chcanv.cpp

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/**************************************************************************
 *   Copyright (C) 2018 by David S. Register                               *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, see <https://www.gnu.org/licenses/>. *
 **************************************************************************/
 
#include <vector>
 
#include "gl_headers.h"  // Must be included before anything using GL stuff
 
// For compilers that support precompilation, includes "wx.h".
#include <wx/wxprec.h>
 
#ifndef WX_PRECOMP
#include <wx/wx.h>
#endif  // precompiled headers
#include <wx/image.h>
#include <wx/graphics.h>
#include <wx/clipbrd.h>
#include <wx/aui/aui.h>
 
#include "config.h"
 
#include "o_sound/o_sound.h"
 
#include "model/ais_decoder.h"
#include "model/ais_state_vars.h"
#include "model/ais_target_data.h"
#include "model/cmdline.h"
#include "model/conn_params.h"
#include "model/geodesic.h"
#include "model/gui.h"
#include "model/gui_vars.h"
#include "model/idents.h"
#include "model/multiplexer.h"
#include "model/notification_manager.h"
#include "model/nav_object_database.h"
#include "model/navobj_db.h"
#include "model/navutil_base.h"
#include "model/own_ship.h"
#include "model/plugin_comm.h"
#include "model/route.h"
#include "model/routeman.h"
#include "model/select.h"
#include "model/select_item.h"
#include "model/track.h"
 
#include "ais.h"
#include "ais_target_alert_dlg.h"
#include "ais_target_query_dlg.h"
#include "canvas_config.h"
#include "canvas_menu.h"
#include "canvas_options.h"
#include "chartdb.h"
#include "chartimg.h"
#include "chcanv.h"
#include "ch_info_win.h"
#include "cm93.h"  // for chart outline draw
#include "compass.h"
#include "concanv.h"
#include "detail_slider.h"
#include "hotkeys_dlg.h"
#include "font_mgr.h"
#include "gl_texture_descr.h"
#include "go_to_position_dlg.h"
#include "gshhs.h"
#include "ienc_toolbar.h"
#include "kml.h"
#include "line_clip.h"
#include "mark_info.h"
#include "mbtiles.h"
#include "mui_bar.h"
#include "navutil.h"
#include "ocpn_aui_manager.h"
#include "ocpndc.h"
#include "ocpn_frame.h"
#include "ocpn_pixel.h"
#include "ocpn_region.h"
#include "options.h"
#include "piano.h"
#include "pluginmanager.h"
#include "quilt.h"
#include "route_gui.h"
#include "routemanagerdialog.h"
#include "route_point_gui.h"
#include "route_prop_dlg_impl.h"
#include "s52plib.h"
#include "s52utils.h"
#include "s57_query_dlg.h"
#include "s57chart.h"  // for ArrayOfS57Obj
#include "shapefile_basemap.h"
#include "styles.h"
#include "tcmgr.h"
#include "tc_win.h"
#include "thumbwin.h"
#include "tide_time.h"
#include "timers.h"
#include "toolbar.h"
#include "track_gui.h"
#include "track_prop_dlg.h"
#include "undo.h"
 
#include "s57_ocpn_utils.h"
 
#ifdef __ANDROID__
#include "androidUTIL.h"
#endif
 
#ifdef ocpnUSE_GL
#include "gl_chart_canvas.h"
#include "notification_manager_gui.h"
#include "model/notification_manager.h"
#endif
 
#ifdef __VISUALC__
#include <wx/msw/msvcrt.h>
#endif
 
#ifndef __WXMSW__
#include <signal.h>
#include <setjmp.h>
#endif
 
#ifdef __WXMSW__
#define printf printf2
 
int __cdecl printf2(const char *format, ...) {
  char str[1024];
 
  va_list argptr;
  va_start(argptr, format);
  int ret = vsnprintf(str, sizeof(str), format, argptr);
  va_end(argptr);
  OutputDebugStringA(str);
  return ret;
}
#endif
 
#if defined(__MSVC__) && (_MSC_VER < 1700)
#define trunc(d) ((d > 0) ? floor(d) : ceil(d))
#endif
 
//  Define to enable the invocation of a temporary menubar by pressing the Alt
//  key. Not implemented for Windows XP, as it interferes with Alt-Tab
//  processing.
#define OCPN_ALT_MENUBAR 1
 
//    Profiling support
// #include "/usr/include/valgrind/callgrind.h"
 
// ----------------------------------------------------------------------------
// Useful Prototypes
// ----------------------------------------------------------------------------
extern ColorScheme global_color_scheme;  // library dependence
extern wxColor GetDimColor(wxColor c);   // library dependence
 
static bool g_bSmoothRecenter = true;
static bool bDrawCurrentValues;
static int mouse_x;
static int mouse_y;
static bool mouse_leftisdown;
static bool g_brouteCreating;
static int r_gamma_mult;
static int g_gamma_mult;
static int b_gamma_mult;
static int gamma_state;
static bool g_brightness_init;
static int last_brightness;
static wxGLContext *g_pGLcontext;  // shared common context
 
// "Curtain" mode parameters
static wxDialog *g_pcurtain;
 
static wxString g_lastS52PLIBPluginMessage;
 
#define MIN_BRIGHT 10
#define MAX_BRIGHT 100
 
//------------------------------------------------------------------------------
//    ChartCanvas Implementation
//------------------------------------------------------------------------------
BEGIN_EVENT_TABLE(ChartCanvas, wxWindow)
EVT_PAINT(ChartCanvas::OnPaint)
EVT_ACTIVATE(ChartCanvas::OnActivate)
EVT_SIZE(ChartCanvas::OnSize)
#ifndef HAVE_WX_GESTURE_EVENTS
EVT_MOUSE_EVENTS(ChartCanvas::MouseEvent)
#endif
EVT_TIMER(DBLCLICK_TIMER, ChartCanvas::MouseTimedEvent)
EVT_TIMER(PAN_TIMER, ChartCanvas::PanTimerEvent)
EVT_TIMER(MOVEMENT_TIMER, ChartCanvas::MovementTimerEvent)
EVT_TIMER(MOVEMENT_STOP_TIMER, ChartCanvas::MovementStopTimerEvent)
EVT_TIMER(CURTRACK_TIMER, ChartCanvas::OnCursorTrackTimerEvent)
EVT_TIMER(ROT_TIMER, ChartCanvas::RotateTimerEvent)
EVT_TIMER(ROPOPUP_TIMER, ChartCanvas::OnRolloverPopupTimerEvent)
EVT_TIMER(ROUTEFINISH_TIMER, ChartCanvas::OnRouteFinishTimerEvent)
EVT_KEY_DOWN(ChartCanvas::OnKeyDown)
EVT_KEY_UP(ChartCanvas::OnKeyUp)
EVT_CHAR(ChartCanvas::OnKeyChar)
EVT_MOUSE_CAPTURE_LOST(ChartCanvas::LostMouseCapture)
EVT_KILL_FOCUS(ChartCanvas::OnKillFocus)
EVT_SET_FOCUS(ChartCanvas::OnSetFocus)
EVT_MENU(-1, ChartCanvas::OnToolLeftClick)
EVT_TIMER(DEFERRED_FOCUS_TIMER, ChartCanvas::OnDeferredFocusTimerEvent)
EVT_TIMER(MOVEMENT_VP_TIMER, ChartCanvas::MovementVPTimerEvent)
EVT_TIMER(DRAG_INERTIA_TIMER, ChartCanvas::OnChartDragInertiaTimer)
EVT_TIMER(JUMP_EASE_TIMER, ChartCanvas::OnJumpEaseTimer)
EVT_TIMER(MENU_TIMER, ChartCanvas::OnMenuTimer)
EVT_TIMER(TAP_TIMER, ChartCanvas::OnTapTimer)
 
END_EVENT_TABLE()
 
// Define a constructor for my canvas
ChartCanvas::ChartCanvas(wxFrame *frame, int canvasIndex, wxWindow *nmea_log)
    : wxWindow(frame, wxID_ANY, wxPoint(20, 20), wxSize(5, 5), wxNO_BORDER),
      m_nmea_log(nmea_log) {
  parent_frame = (MyFrame *)frame;  // save a pointer to parent
  m_canvasIndex = canvasIndex;
 
  pscratch_bm = NULL;
 
  SetBackgroundColour(wxColour(0, 0, 0));
  SetBackgroundStyle(wxBG_STYLE_CUSTOM);  // on WXMSW, this prevents flashing on
                                          // color scheme change
 
  m_groupIndex = 0;
  m_bDrawingRoute = false;
  m_bRouteEditing = false;
  m_bMarkEditing = false;
  m_bRoutePoinDragging = false;
  m_bIsInRadius = false;
  m_bMayToggleMenuBar = true;
 
  m_bFollow = false;
  m_bShowNavobjects = true;
  m_bTCupdate = false;
  m_bAppendingRoute = false;  // was true in MSW, why??
  pThumbDIBShow = NULL;
  m_bShowCurrent = false;
  m_bShowTide = false;
  bShowingCurrent = false;
  pCwin = NULL;
  warp_flag = false;
  m_bzooming = false;
  m_b_paint_enable = true;
  m_routeState = 0;
 
  pss_overlay_bmp = NULL;
  pss_overlay_mask = NULL;
  m_bChartDragging = false;
  m_bMeasure_Active = false;
  m_bMeasure_DistCircle = false;
  m_pMeasureRoute = NULL;
  m_pTrackRolloverWin = NULL;
  m_pRouteRolloverWin = NULL;
  m_pAISRolloverWin = NULL;
  m_bedge_pan = false;
  m_disable_edge_pan = false;
  m_dragoffsetSet = false;
  m_bautofind = false;
  m_bFirstAuto = true;
  m_groupIndex = 0;
  m_singleChart = NULL;
  m_upMode = NORTH_UP_MODE;
  m_bShowAIS = true;
  m_bShowAISScaled = false;
  m_timed_move_vp_active = false;
  m_inPinch = false;
  m_disable_adjust_on_zoom = false;
 
  m_vLat = 0.;
  m_vLon = 0.;
 
  m_pCIWin = NULL;
 
  m_pSelectedRoute = NULL;
  m_pSelectedTrack = NULL;
  m_pRoutePointEditTarget = NULL;
  m_pFoundPoint = NULL;
  m_pMouseRoute = NULL;
  m_prev_pMousePoint = NULL;
  m_pEditRouteArray = NULL;
  m_pFoundRoutePoint = NULL;
  m_FinishRouteOnKillFocus = true;
 
  m_pRolloverRouteSeg = NULL;
  m_pRolloverTrackSeg = NULL;
  m_bsectors_shown = false;
 
  m_bbrightdir = false;
  r_gamma_mult = 1;
  g_gamma_mult = 1;
  b_gamma_mult = 1;
 
  m_pos_image_user_day = NULL;
  m_pos_image_user_dusk = NULL;
  m_pos_image_user_night = NULL;
  m_pos_image_user_grey_day = NULL;
  m_pos_image_user_grey_dusk = NULL;
  m_pos_image_user_grey_night = NULL;
 
  m_zoom_factor = 1;
  m_rotation_speed = 0;
  m_mustmove = 0;
 
  m_OSoffsetx = 0.;
  m_OSoffsety = 0.;
 
  m_pos_image_user_yellow_day = NULL;
  m_pos_image_user_yellow_dusk = NULL;
  m_pos_image_user_yellow_night = NULL;
 
  SetOwnShipState(SHIP_INVALID);
 
  undo = new Undo(this);
 
  VPoint.Invalidate();
 
  m_glcc = NULL;
 
  m_focus_indicator_pix = 1;
 
  m_pCurrentStack = NULL;
  m_bpersistent_quilt = false;
  m_piano_ctx_menu = NULL;
  m_Compass = NULL;
  m_NotificationsList = NULL;
  m_notification_button = NULL;
 
  g_ChartNotRenderScaleFactor = 2.0;
  m_bShowScaleInStatusBar = true;
 
  m_muiBar = NULL;
  m_bShowScaleInStatusBar = false;
  m_show_focus_bar = true;
 
  m_bShowOutlines = false;
  m_bDisplayGrid = false;
  m_bShowDepthUnits = true;
  m_encDisplayCategory = (int)STANDARD;
 
  m_encShowLights = true;
  m_encShowAnchor = true;
  m_encShowDataQual = false;
  m_bShowGPS = true;
  m_pQuilt = new Quilt(this);
  SetQuiltMode(true);
  SetAlertString("");
  m_sector_glat = 0;
  m_sector_glon = 0;
  g_PrintingInProgress = false;
 
#ifdef HAVE_WX_GESTURE_EVENTS
  m_oldVPSScale = -1.0;
  m_popupWanted = false;
  m_leftdown = false;
#endif /* HAVE_WX_GESTURE_EVENTS */
  m_inLongPress = false;
  m_sw_down_time = 0;
  m_sw_up_time = 0;
  m_sw_left_down.Start();
  m_sw_left_up.Start();
 
  SetupGlCanvas();
 
  singleClickEventIsValid = false;
 
  //    Build the cursors
 
  pCursorLeft = NULL;
  pCursorRight = NULL;
  pCursorUp = NULL;
  pCursorDown = NULL;
  pCursorArrow = NULL;
  pCursorPencil = NULL;
  pCursorCross = NULL;
 
  RebuildCursors();
 
  SetCursor(*pCursorArrow);
 
  pPanTimer = new wxTimer(this, m_MouseDragging);
  pPanTimer->Stop();
 
  pMovementTimer = new wxTimer(this, MOVEMENT_TIMER);
  pMovementTimer->Stop();
 
  pMovementStopTimer = new wxTimer(this, MOVEMENT_STOP_TIMER);
  pMovementStopTimer->Stop();
 
  pRotDefTimer = new wxTimer(this, ROT_TIMER);
  pRotDefTimer->Stop();
 
  m_DoubleClickTimer = new wxTimer(this, DBLCLICK_TIMER);
  m_DoubleClickTimer->Stop();
 
  m_VPMovementTimer.SetOwner(this, MOVEMENT_VP_TIMER);
  m_chart_drag_inertia_timer.SetOwner(this, DRAG_INERTIA_TIMER);
  m_chart_drag_inertia_active = false;
 
  m_easeTimer.SetOwner(this, JUMP_EASE_TIMER);
  m_animationActive = false;
  m_menuTimer.SetOwner(this, MENU_TIMER);
  m_tap_timer.SetOwner(this, TAP_TIMER);
 
  m_panx = m_pany = 0;
  m_panspeed = 0;
  m_panx_target_final = m_pany_target_final = 0;
  m_panx_target_now = m_pany_target_now = 0;
  m_DragTrigger = -1;
 
  pCurTrackTimer = new wxTimer(this, CURTRACK_TIMER);
  pCurTrackTimer->Stop();
  m_curtrack_timer_msec = 10;
 
  m_wheelzoom_stop_oneshot = 0;
  m_last_wheel_dir = 0;
 
  m_RolloverPopupTimer.SetOwner(this, ROPOPUP_TIMER);
 
  m_deferredFocusTimer.SetOwner(this, DEFERRED_FOCUS_TIMER);
 
  m_rollover_popup_timer_msec = 20;
 
  m_routeFinishTimer.SetOwner(this, ROUTEFINISH_TIMER);
 
  m_b_rot_hidef = true;
 
  proute_bm = NULL;
  m_prot_bm = NULL;
 
  m_upMode = NORTH_UP_MODE;
  m_bLookAhead = false;
 
  // Set some benign initial values
 
  m_cs = GLOBAL_COLOR_SCHEME_DAY;
  VPoint.clat = 0;
  VPoint.clon = 0;
  VPoint.view_scale_ppm = 1;
  VPoint.Invalidate();
  m_nMeasureState = 0;
  m_ignore_next_leftup = false;
 
  m_canvas_scale_factor = 1.;
 
  m_canvas_width = 1000;
 
  m_overzoomTextWidth = 0;
  m_overzoomTextHeight = 0;
 
  //    Create the default world chart
  pWorldBackgroundChart = new GSHHSChart;
  gShapeBasemap.Reset();
 
  //    Create the default depth unit emboss maps
  m_pEM_Feet = NULL;
  m_pEM_Meters = NULL;
  m_pEM_Fathoms = NULL;
 
  CreateDepthUnitEmbossMaps(GLOBAL_COLOR_SCHEME_DAY);
 
  m_pEM_OverZoom = NULL;
  SetOverzoomFont();
  CreateOZEmbossMapData(GLOBAL_COLOR_SCHEME_DAY);
 
  //    Build icons for tide/current points
  ocpnStyle::Style *style = g_StyleManager->GetCurrentStyle();
  m_bmTideDay =
      style->GetIconScaled("tidesml", 1. / g_Platform->GetDisplayDIPMult(this));
 
  //    Dusk
  m_bmTideDusk = CreateDimBitmap(m_bmTideDay, .50);
 
  //    Night
  m_bmTideNight = CreateDimBitmap(m_bmTideDay, .20);
 
  //    Build Dusk/Night  ownship icons
  double factor_dusk = 0.5;
  double factor_night = 0.25;
 
  // Red
  m_os_image_red_day = style->GetIcon("ship-red").ConvertToImage();
 
  int rimg_width = m_os_image_red_day.GetWidth();
  int rimg_height = m_os_image_red_day.GetHeight();
 
  m_os_image_red_dusk = m_os_image_red_day.Copy();
  m_os_image_red_night = m_os_image_red_day.Copy();
 
  for (int iy = 0; iy < rimg_height; iy++) {
    for (int ix = 0; ix < rimg_width; ix++) {
      if (!m_os_image_red_day.IsTransparent(ix, iy)) {
        wxImage::RGBValue rgb(m_os_image_red_day.GetRed(ix, iy),
                              m_os_image_red_day.GetGreen(ix, iy),
                              m_os_image_red_day.GetBlue(ix, iy));
        wxImage::HSVValue hsv = wxImage::RGBtoHSV(rgb);
        hsv.value = hsv.value * factor_dusk;
        wxImage::RGBValue nrgb = wxImage::HSVtoRGB(hsv);
        m_os_image_red_dusk.SetRGB(ix, iy, nrgb.red, nrgb.green, nrgb.blue);
 
        hsv = wxImage::RGBtoHSV(rgb);
        hsv.value = hsv.value * factor_night;
        nrgb = wxImage::HSVtoRGB(hsv);
        m_os_image_red_night.SetRGB(ix, iy, nrgb.red, nrgb.green, nrgb.blue);
      }
    }
  }
 
  // Grey
  m_os_image_grey_day =
      style->GetIcon("ship-red").ConvertToImage().ConvertToGreyscale();
 
  int gimg_width = m_os_image_grey_day.GetWidth();
  int gimg_height = m_os_image_grey_day.GetHeight();
 
  m_os_image_grey_dusk = m_os_image_grey_day.Copy();
  m_os_image_grey_night = m_os_image_grey_day.Copy();
 
  for (int iy = 0; iy < gimg_height; iy++) {
    for (int ix = 0; ix < gimg_width; ix++) {
      if (!m_os_image_grey_day.IsTransparent(ix, iy)) {
        wxImage::RGBValue rgb(m_os_image_grey_day.GetRed(ix, iy),
                              m_os_image_grey_day.GetGreen(ix, iy),
                              m_os_image_grey_day.GetBlue(ix, iy));
        wxImage::HSVValue hsv = wxImage::RGBtoHSV(rgb);
        hsv.value = hsv.value * factor_dusk;
        wxImage::RGBValue nrgb = wxImage::HSVtoRGB(hsv);
        m_os_image_grey_dusk.SetRGB(ix, iy, nrgb.red, nrgb.green, nrgb.blue);
 
        hsv = wxImage::RGBtoHSV(rgb);
        hsv.value = hsv.value * factor_night;
        nrgb = wxImage::HSVtoRGB(hsv);
        m_os_image_grey_night.SetRGB(ix, iy, nrgb.red, nrgb.green, nrgb.blue);
      }
    }
  }
 
  // Yellow
  m_os_image_yellow_day = m_os_image_red_day.Copy();
 
  gimg_width = m_os_image_yellow_day.GetWidth();
  gimg_height = m_os_image_yellow_day.GetHeight();
 
  m_os_image_yellow_dusk = m_os_image_red_day.Copy();
  m_os_image_yellow_night = m_os_image_red_day.Copy();
 
  for (int iy = 0; iy < gimg_height; iy++) {
    for (int ix = 0; ix < gimg_width; ix++) {
      if (!m_os_image_yellow_day.IsTransparent(ix, iy)) {
        wxImage::RGBValue rgb(m_os_image_yellow_day.GetRed(ix, iy),
                              m_os_image_yellow_day.GetGreen(ix, iy),
                              m_os_image_yellow_day.GetBlue(ix, iy));
        wxImage::HSVValue hsv = wxImage::RGBtoHSV(rgb);
        hsv.hue += 60. / 360.;  // shift to yellow
        wxImage::RGBValue nrgb = wxImage::HSVtoRGB(hsv);
        m_os_image_yellow_day.SetRGB(ix, iy, nrgb.red, nrgb.green, nrgb.blue);
 
        hsv = wxImage::RGBtoHSV(rgb);
        hsv.value = hsv.value * factor_dusk;
        hsv.hue += 60. / 360.;  // shift to yellow
        nrgb = wxImage::HSVtoRGB(hsv);
        m_os_image_yellow_dusk.SetRGB(ix, iy, nrgb.red, nrgb.green, nrgb.blue);
 
        hsv = wxImage::RGBtoHSV(rgb);
        hsv.hue += 60. / 360.;  // shift to yellow
        hsv.value = hsv.value * factor_night;
        nrgb = wxImage::HSVtoRGB(hsv);
        m_os_image_yellow_night.SetRGB(ix, iy, nrgb.red, nrgb.green, nrgb.blue);
      }
    }
  }
 
  //  Set initial pointers to ownship images
  m_pos_image_red = &m_os_image_red_day;
  m_pos_image_yellow = &m_os_image_yellow_day;
  m_pos_image_grey = &m_os_image_grey_day;
 
  SetUserOwnship();
 
  m_pBrightPopup = NULL;
 
#ifdef ocpnUSE_GL
  if (!g_bdisable_opengl) m_pQuilt->EnableHighDefinitionZoom(true);
#endif
 
  SetupGridFont();
 
  m_Piano = new Piano(this);
 
  m_bShowCompassWin = true;
  m_Compass = new ocpnCompass(this);
  m_Compass->SetScaleFactor(g_compass_scalefactor);
  m_Compass->Show(m_bShowCompassWin && g_bShowCompassWin);
 
  if (IsPrimaryCanvas()) {
    m_notification_button = new NotificationButton(this);
    m_notification_button->SetScaleFactor(g_compass_scalefactor);
    m_notification_button->Show(true);
  }
 
  m_pianoFrozen = false;
 
  SetMinSize(wxSize(200, 200));
 
  m_displayScale = 1.0;
#if defined(__WXOSX__) || defined(__WXGTK3__)
  // Support scaled HDPI displays.
  m_displayScale = GetContentScaleFactor();
#endif
  VPoint.SetPixelScale(m_displayScale);
 
#ifdef HAVE_WX_GESTURE_EVENTS
  // if (!m_glcc)
  {
    if (!EnableTouchEvents(wxTOUCH_ZOOM_GESTURE | wxTOUCH_PRESS_GESTURES)) {
      wxLogError("Failed to enable touch events");
    }
 
    // Bind(wxEVT_GESTURE_ZOOM, &ChartCanvas::OnZoom, this);
 
    Bind(wxEVT_LONG_PRESS, &ChartCanvas::OnLongPress, this);
    Bind(wxEVT_PRESS_AND_TAP, &ChartCanvas::OnPressAndTap, this);
 
    Bind(wxEVT_RIGHT_UP, &ChartCanvas::OnRightUp, this);
    Bind(wxEVT_RIGHT_DOWN, &ChartCanvas::OnRightDown, this);
 
    Bind(wxEVT_LEFT_UP, &ChartCanvas::OnLeftUp, this);
    Bind(wxEVT_LEFT_DOWN, &ChartCanvas::OnLeftDown, this);
 
    Bind(wxEVT_MOUSEWHEEL, &ChartCanvas::OnWheel, this);
    Bind(wxEVT_MOTION, &ChartCanvas::OnMotion, this);
  }
#endif
 
  // Listen for notification events
  auto &noteman = NotificationManager::GetInstance();
 
  wxDEFINE_EVENT(EVT_NOTIFICATIONLIST_CHANGE, wxCommandEvent);
  evt_notificationlist_change_listener.Listen(
      noteman.evt_notificationlist_change, this, EVT_NOTIFICATIONLIST_CHANGE);
  Bind(EVT_NOTIFICATIONLIST_CHANGE, [&](wxCommandEvent &) {
    if (m_NotificationsList && m_NotificationsList->IsShown()) {
      m_NotificationsList->ReloadNotificationList();
    }
    Refresh();
  });
}
 
ChartCanvas::~ChartCanvas() {
  delete pThumbDIBShow;
 
  //    Delete Cursors
  delete pCursorLeft;
  delete pCursorRight;
  delete pCursorUp;
  delete pCursorDown;
  delete pCursorArrow;
  delete pCursorPencil;
  delete pCursorCross;
 
  delete pPanTimer;
  delete pMovementTimer;
  delete pMovementStopTimer;
  delete pCurTrackTimer;
  delete pRotDefTimer;
  delete m_DoubleClickTimer;
 
  delete m_pTrackRolloverWin;
  delete m_pRouteRolloverWin;
  delete m_pAISRolloverWin;
  delete m_pBrightPopup;
 
  delete m_pCIWin;
 
  delete pscratch_bm;
 
  m_dc_route.SelectObject(wxNullBitmap);
  delete proute_bm;
 
  delete pWorldBackgroundChart;
  delete pss_overlay_bmp;
 
  delete m_pEM_Feet;
  delete m_pEM_Meters;
  delete m_pEM_Fathoms;
 
  delete m_pEM_OverZoom;
  //        delete m_pEM_CM93Offset;
 
  delete m_prot_bm;
 
  delete m_pos_image_user_day;
  delete m_pos_image_user_dusk;
  delete m_pos_image_user_night;
  delete m_pos_image_user_grey_day;
  delete m_pos_image_user_grey_dusk;
  delete m_pos_image_user_grey_night;
  delete m_pos_image_user_yellow_day;
  delete m_pos_image_user_yellow_dusk;
  delete m_pos_image_user_yellow_night;
 
  delete undo;
#ifdef ocpnUSE_GL
  if (!g_bdisable_opengl) {
    delete m_glcc;
 
#if wxCHECK_VERSION(2, 9, 0)
    if (IsPrimaryCanvas() && g_bopengl) delete g_pGLcontext;
#endif
  }
#endif
 
  // Delete the MUI bar, but make sure there is no pointer to it during destroy.
  // wx tries to deliver events to this canvas during destroy.
  MUIBar *muiBar = m_muiBar;
  m_muiBar = 0;
  delete muiBar;
  delete m_pQuilt;
  delete m_pCurrentStack;
  delete m_Compass;
  delete m_Piano;
  delete m_notification_button;
}
 
void ChartCanvas::SetupGridFont() {
  wxFont *dFont = FontMgr::Get().GetFont(_("GridText"), 0);
  double dpi_factor = 1. / g_BasePlatform->GetDisplayDIPMult(this);
  int gridFontSize = wxMax(10, dFont->GetPointSize() * dpi_factor);
  m_pgridFont = FontMgr::Get().FindOrCreateFont(
      gridFontSize, wxFONTFAMILY_SWISS, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL,
      FALSE, wxString("Arial"));
}
 
void ChartCanvas::RebuildCursors() {
  delete pCursorLeft;
  delete pCursorRight;
  delete pCursorUp;
  delete pCursorDown;
  delete pCursorArrow;
  delete pCursorPencil;
  delete pCursorCross;
 
  ocpnStyle::Style *style = g_StyleManager->GetCurrentStyle();
  double cursorScale = exp(g_GUIScaleFactor * (0.693 / 5.0));
 
  double pencilScale = 1.0 / g_Platform->GetDisplayDIPMult(gFrame);
 
  wxImage ICursorLeft = style->GetIcon("left").ConvertToImage();
  wxImage ICursorRight = style->GetIcon("right").ConvertToImage();
  wxImage ICursorUp = style->GetIcon("up").ConvertToImage();
  wxImage ICursorDown = style->GetIcon("down").ConvertToImage();
  wxImage ICursorPencil =
      style->GetIconScaled("pencil", pencilScale).ConvertToImage();
  wxImage ICursorCross = style->GetIcon("cross").ConvertToImage();
 
#if !defined(__WXMSW__) && !defined(__WXQT__)
  ICursorLeft.ConvertAlphaToMask(128);
  ICursorRight.ConvertAlphaToMask(128);
  ICursorUp.ConvertAlphaToMask(128);
  ICursorDown.ConvertAlphaToMask(128);
  ICursorPencil.ConvertAlphaToMask(10);
  ICursorCross.ConvertAlphaToMask(10);
#endif
 
  if (ICursorLeft.Ok()) {
    ICursorLeft.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0);
    ICursorLeft.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 15);
    pCursorLeft = new wxCursor(ICursorLeft);
  } else
    pCursorLeft = new wxCursor(wxCURSOR_ARROW);
 
  if (ICursorRight.Ok()) {
    ICursorRight.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 31);
    ICursorRight.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 15);
    pCursorRight = new wxCursor(ICursorRight);
  } else
    pCursorRight = new wxCursor(wxCURSOR_ARROW);
 
  if (ICursorUp.Ok()) {
    ICursorUp.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 15);
    ICursorUp.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 0);
    pCursorUp = new wxCursor(ICursorUp);
  } else
    pCursorUp = new wxCursor(wxCURSOR_ARROW);
 
  if (ICursorDown.Ok()) {
    ICursorDown.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 15);
    ICursorDown.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 31);
    pCursorDown = new wxCursor(ICursorDown);
  } else
    pCursorDown = new wxCursor(wxCURSOR_ARROW);
 
  if (ICursorPencil.Ok()) {
    ICursorPencil.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0 * pencilScale);
    ICursorPencil.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 16 * pencilScale);
    pCursorPencil = new wxCursor(ICursorPencil);
  } else
    pCursorPencil = new wxCursor(wxCURSOR_ARROW);
 
  if (ICursorCross.Ok()) {
    ICursorCross.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 13);
    ICursorCross.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 12);
    pCursorCross = new wxCursor(ICursorCross);
  } else
    pCursorCross = new wxCursor(wxCURSOR_ARROW);
 
  pCursorArrow = new wxCursor(wxCURSOR_ARROW);
  pPlugIn_Cursor = NULL;
}
 
void ChartCanvas::CanvasApplyLocale() {
  CreateDepthUnitEmbossMaps(m_cs);
  CreateOZEmbossMapData(m_cs);
}
 
void ChartCanvas::SetupGlCanvas() {
#ifndef __ANDROID__
#ifdef ocpnUSE_GL
  if (!g_bdisable_opengl) {
    if (g_bopengl) {
      wxLogMessage("Creating glChartCanvas");
      m_glcc = new glChartCanvas(this);
 
      // We use one context for all GL windows, so that textures etc will be
      // automatically shared
      if (IsPrimaryCanvas()) {
        // qDebug() << "Creating Primary Context";
 
        //             wxGLContextAttrs ctxAttr;
        //             ctxAttr.PlatformDefaults().CoreProfile().OGLVersion(3,
        //             2).EndList(); wxGLContext *pctx = new wxGLContext(m_glcc,
        //             NULL, &ctxAttr);
        wxGLContext *pctx = new wxGLContext(m_glcc);
        m_glcc->SetContext(pctx);
        g_pGLcontext = pctx;  // Save a copy of the common context
      } else {
#ifdef __WXOSX__
        m_glcc->SetContext(new wxGLContext(m_glcc, g_pGLcontext));
#else
        m_glcc->SetContext(g_pGLcontext);  // If not primary canvas, use the
                                           // saved common context
#endif
      }
    }
  }
#endif
#endif
 
#ifdef __ANDROID__  // ocpnUSE_GL
  if (!g_bdisable_opengl) {
    if (g_bopengl) {
      // qDebug() << "SetupGlCanvas";
      wxLogMessage("Creating glChartCanvas");
 
      // We use one context for all GL windows, so that textures etc will be
      // automatically shared
      if (IsPrimaryCanvas()) {
        qDebug() << "Creating Primary glChartCanvas";
 
        //             wxGLContextAttrs ctxAttr;
        //             ctxAttr.PlatformDefaults().CoreProfile().OGLVersion(3,
        //             2).EndList(); wxGLContext *pctx = new wxGLContext(m_glcc,
        //             NULL, &ctxAttr);
        m_glcc = new glChartCanvas(this);
 
        wxGLContext *pctx = new wxGLContext(m_glcc);
        m_glcc->SetContext(pctx);
        g_pGLcontext = pctx;  // Save a copy of the common context
        m_glcc->m_pParentCanvas = this;
        // m_glcc->Reparent(this);
      } else {
        qDebug() << "Creating Secondary glChartCanvas";
        // QGLContext *pctx =
        // gFrame->GetPrimaryCanvas()->GetglCanvas()->GetQGLContext(); qDebug()
        // << "pctx: " << pctx;
 
        m_glcc = new glChartCanvas(
            gFrame, gFrame->GetPrimaryCanvas()->GetglCanvas());  // Shared
        //                 m_glcc = new glChartCanvas(this, pctx);   //Shared
        //                 m_glcc = new glChartCanvas(this, wxPoint(900, 0));
        wxGLContext *pwxctx = new wxGLContext(m_glcc);
        m_glcc->SetContext(pwxctx);
        m_glcc->m_pParentCanvas = this;
        // m_glcc->Reparent(this);
      }
    }
  }
#endif
}
 
void ChartCanvas::OnKillFocus(wxFocusEvent &WXUNUSED(event)) {
  RefreshRect(wxRect(0, 0, GetClientSize().x, m_focus_indicator_pix), false);
 
  // On Android, we get a KillFocus on just about every keystroke.
  //  Why?
#ifdef __ANDROID__
  return;
#endif
 
  // Special logic:
  //  On OSX in GL mode, each mouse click causes a kill and immediate regain of
  //  canvas focus.  Why???  Who knows... So, we provide for this case by
  //  starting a timer if required to actually Finish() a route on a legitimate
  //  focus change, but not if the focus is quickly regained ( <20 msec.) on
  //  this canvas.
#ifdef __WXOSX__
  if (m_routeState && m_FinishRouteOnKillFocus)
    m_routeFinishTimer.Start(20, wxTIMER_ONE_SHOT);
#else
  if (m_routeState && m_FinishRouteOnKillFocus) FinishRoute();
#endif
}
 
void ChartCanvas::OnSetFocus(wxFocusEvent &WXUNUSED(event)) {
  m_routeFinishTimer.Stop();
 
  // Try to keep the global top-line menubar selections up to date with the
  // current "focus" canvas
  gFrame->UpdateGlobalMenuItems(this);
 
  RefreshRect(wxRect(0, 0, GetClientSize().x, m_focus_indicator_pix), false);
}
 
void ChartCanvas::OnRouteFinishTimerEvent(wxTimerEvent &event) {
  if (m_routeState && m_FinishRouteOnKillFocus) FinishRoute();
}
 
#ifdef HAVE_WX_GESTURE_EVENTS
void ChartCanvas::OnLongPress(wxLongPressEvent &event) {
#ifdef __ANDROID__
  /* we defer the popup menu call upon the leftup event
  else the menu disappears immediately,
  (see
  http://wxwidgets.10942.n7.nabble.com/Popupmenu-disappears-immediately-if-called-from-QueueEvent-td92572.html)
  */
  m_popupWanted = true;
#else
  m_inLongPress = !g_bhide_context_menus;
 
  //  Send a synthetic mouse left-up event to sync the mouse pan logic.
  m_menuPos = event.GetPosition();
  wxMouseEvent ev(wxEVT_LEFT_UP);
  ev.m_x = m_menuPos.x;
  ev.m_y = m_menuPos.y;
  wxPostEvent(this, ev);
 
  // In touch mode, send a "RIGHT CLICK" event, for plugins
  if (g_btouch) {
    wxMouseEvent ev_right_click(wxEVT_RIGHT_DOWN);
    ev_right_click.m_x = m_menuPos.x;
    ev_right_click.m_y = m_menuPos.y;
    MouseEvent(ev_right_click);
  }
#endif
}
 
void ChartCanvas::OnPressAndTap(wxPressAndTapEvent &event) {
  // not implemented yet
}
 
void ChartCanvas::OnRightUp(wxMouseEvent &event) { MouseEvent(event); }
 
void ChartCanvas::OnRightDown(wxMouseEvent &event) { MouseEvent(event); }
 
void ChartCanvas::OnLeftUp(wxMouseEvent &event) {
#ifdef __WXGTK__
  long dt = m_sw_left_up.Time() - m_sw_up_time;
  m_sw_up_time = m_sw_left_up.Time();
 
  // printf("  dt %ld\n",dt);
  if (dt < 5) {
    // printf("  Ignored %ld\n",dt );// This is a duplicate emulated event,
    // ignore it.
    return;
  }
#endif
  // printf("Left_UP\n");
 
  wxPoint pos = event.GetPosition();
 
  m_leftdown = false;
 
  if (!m_popupWanted) {
    wxMouseEvent ev(wxEVT_LEFT_UP);
    ev.m_x = pos.x;
    ev.m_y = pos.y;
    MouseEvent(ev);
    return;
  }
 
  m_popupWanted = false;
 
  wxMouseEvent ev(wxEVT_RIGHT_DOWN);
  ev.m_x = pos.x;
  ev.m_y = pos.y;
 
  MouseEvent(ev);
}
 
void ChartCanvas::OnLeftDown(wxMouseEvent &event) {
  m_leftdown = true;
 
  //  Detect and manage multiple left-downs coming from GTK mouse emulation
#ifdef __WXGTK__
  long dt = m_sw_left_down.Time() - m_sw_down_time;
  m_sw_down_time = m_sw_left_down.Time();
 
  // printf("Left_DOWN_Entry:  dt: %ld\n", dt);
 
  // In touch mode, GTK mouse emulation will send duplicate mouse-down events.
  // The timing between the two events is dependent upon the wxWidgets
  // message queue status, and the processing time required for intervening
  // events.
  // We detect and remove the duplicate events by measuring the elapsed time
  // between arrival of events.
  // Choose a duplicate detection time long enough to catch worst case time lag
  // between duplicating events, but considerably shorter than the nominal
  // "intentional double-click" time interval defined generally as 350 msec.
  if (dt < 100) {  // 10 taps per sec. is about the maximum human rate.
    // printf("  Ignored %ld\n",dt );// This is a duplicate emulated event,
    // ignore it.
    return;
  }
#endif
 
  // printf("Left_DOWN\n");
 
  // detect and manage double-tap
#ifdef __WXGTK__
  int max_double_click_distance = wxSystemSettings::GetMetric(wxSYS_DCLICK_X) *
                                  2;  // Use system setting for distance
  wxRect tap_area(m_lastTapPos.x - max_double_click_distance,
                  m_lastTapPos.y - max_double_click_distance,
                  max_double_click_distance * 2, max_double_click_distance * 2);
 
  // A new tap has started, check if it's close enough and in time
  if (m_tap_timer.IsRunning() && tap_area.Contains(event.GetPosition())) {
    // printf("    TapBump 1\n");
    m_tap_count += 1;
  } else {
    // printf("    TapSet 1\n");
    m_tap_count = 1;
    m_lastTapPos = event.GetPosition();
    m_tap_timer.StartOnce(
        350);  //(wxSystemSettings::GetMetric(wxSYS_DCLICK_MSEC));
  }
 
  if (m_tap_count == 2) {
    // printf("    Doubletap detected\n");
    m_tap_count = 0;  // Reset after a double-tap
 
    wxMouseEvent ev(wxEVT_LEFT_DCLICK);
    ev.m_x = event.m_x;
    ev.m_y = event.m_y;
    // wxPostEvent(this, ev);
    MouseEvent(ev);
    return;
  }
 
#endif
 
  MouseEvent(event);
}
 
void ChartCanvas::OnMotion(wxMouseEvent &event) {
  /* This is a workaround, to the fact that on touchscreen, OnMotion comes with
     dragging, upon simple click, and without the OnLeftDown event before Thus,
     this consists in skiping it, and setting the leftdown bit according to a
     status that we trust */
  event.m_leftDown = m_leftdown;
  MouseEvent(event);
}
 
void ChartCanvas::OnZoom(wxZoomGestureEvent &event) {
  /* there are spurious end zoom events upon right-click */
  if (event.IsGestureEnd()) return;
 
  double factor = event.GetZoomFactor();
 
  if (event.IsGestureStart() || m_oldVPSScale < 0) {
    m_oldVPSScale = GetVPScale();
  }
 
  double current_vps = GetVPScale();
  double wanted_factor = m_oldVPSScale / current_vps * factor;
 
  ZoomCanvas(wanted_factor, true, false);
 
  //  Allow combined zoom/pan operation
  if (event.IsGestureStart()) {
    m_zoomStartPoint = event.GetPosition();
  } else {
    wxPoint delta = event.GetPosition() - m_zoomStartPoint;
    PanCanvas(-delta.x, -delta.y);
    m_zoomStartPoint = event.GetPosition();
  }
}
 
void ChartCanvas::OnWheel(wxMouseEvent &event) { MouseEvent(event); }
 
void ChartCanvas::OnDoubleLeftClick(wxMouseEvent &event) {
  DoRotateCanvas(0.0);
}
#endif /* HAVE_WX_GESTURE_EVENTS */
 
void ChartCanvas::OnTapTimer(wxTimerEvent &event) {
  // printf("tap timer %d\n", m_tap_count);
  m_tap_count = 0;
}
 
void ChartCanvas::OnMenuTimer(wxTimerEvent &event) {
  m_FinishRouteOnKillFocus = false;
  CallPopupMenu(m_menuPos.x, m_menuPos.y);
  m_FinishRouteOnKillFocus = true;
}
 
void ChartCanvas::ApplyCanvasConfig(canvasConfig *pcc) {
  SetViewPoint(pcc->iLat, pcc->iLon, pcc->iScale, 0., pcc->iRotation);
  m_vLat = pcc->iLat;
  m_vLon = pcc->iLon;
 
  m_restore_dbindex = pcc->DBindex;
  m_bFollow = pcc->bFollow;
  if (pcc->GroupID < 0) pcc->GroupID = 0;
 
  if (pcc->GroupID > (int)g_pGroupArray->GetCount())
    m_groupIndex = 0;
  else
    m_groupIndex = pcc->GroupID;
 
  if (pcc->bQuilt != GetQuiltMode()) ToggleCanvasQuiltMode();
 
  ShowTides(pcc->bShowTides);
  ShowCurrents(pcc->bShowCurrents);
 
  SetShowDepthUnits(pcc->bShowDepthUnits);
  SetShowGrid(pcc->bShowGrid);
  SetShowOutlines(pcc->bShowOutlines);
 
  SetShowAIS(pcc->bShowAIS);
  SetAttenAIS(pcc->bAttenAIS);
 
  // ENC options
  SetShowENCText(pcc->bShowENCText);
  m_encDisplayCategory = pcc->nENCDisplayCategory;
  m_encShowDepth = pcc->bShowENCDepths;
  m_encShowLightDesc = pcc->bShowENCLightDescriptions;
  m_encShowBuoyLabels = pcc->bShowENCBuoyLabels;
  m_encShowLights = pcc->bShowENCLights;
  m_bShowVisibleSectors = pcc->bShowENCVisibleSectorLights;
  m_encShowAnchor = pcc->bShowENCAnchorInfo;
  m_encShowDataQual = pcc->bShowENCDataQuality;
 
  bool courseUp = pcc->bCourseUp;
  bool headUp = pcc->bHeadUp;
  m_upMode = NORTH_UP_MODE;
  if (courseUp)
    m_upMode = COURSE_UP_MODE;
  else if (headUp)
    m_upMode = HEAD_UP_MODE;
 
  m_bLookAhead = pcc->bLookahead;
 
  m_singleChart = NULL;
}
 
void ChartCanvas::ApplyGlobalSettings() {
  // GPS compas window
  if (m_Compass) {
    m_Compass->Show(m_bShowCompassWin && g_bShowCompassWin);
    if (m_bShowCompassWin && g_bShowCompassWin) m_Compass->UpdateStatus();
  }
  if (m_notification_button) m_notification_button->UpdateStatus();
}
 
void ChartCanvas::CheckGroupValid(bool showMessage, bool switchGroup0) {
  bool groupOK = CheckGroup(m_groupIndex);
 
  if (!groupOK) {
    SetGroupIndex(m_groupIndex, true);
  }
}
 
void ChartCanvas::SetShowGPS(bool bshow) {
  if (m_bShowGPS != bshow) {
    delete m_Compass;
    m_Compass = new ocpnCompass(this, bshow);
    m_Compass->SetScaleFactor(g_compass_scalefactor);
    m_Compass->Show(m_bShowCompassWin && g_bShowCompassWin);
  }
  m_bShowGPS = bshow;
}
 
void ChartCanvas::SetShowGPSCompassWindow(bool bshow) {
  m_bShowCompassWin = bshow;
  if (m_Compass) {
    m_Compass->Show(m_bShowCompassWin && g_bShowCompassWin);
    if (m_bShowCompassWin && g_bShowCompassWin) m_Compass->UpdateStatus();
  }
}
 
int ChartCanvas::GetPianoHeight() {
  int height = 0;
  if (g_bShowChartBar && GetPiano()) height = m_Piano->GetHeight();
 
  return height;
}
 
void ChartCanvas::ConfigureChartBar() {
  ocpnStyle::Style *style = g_StyleManager->GetCurrentStyle();
 
  m_Piano->SetVizIcon(new wxBitmap(style->GetIcon("viz")));
  m_Piano->SetInVizIcon(new wxBitmap(style->GetIcon("redX")));
 
  if (GetQuiltMode()) {
    m_Piano->SetRoundedRectangles(true);
  }
  m_Piano->SetTMercIcon(new wxBitmap(style->GetIcon("tmercprj")));
  m_Piano->SetPolyIcon(new wxBitmap(style->GetIcon("polyprj")));
  m_Piano->SetSkewIcon(new wxBitmap(style->GetIcon("skewprj")));
}
 
void ChartCanvas::ShowTides(bool bShow) {
  gFrame->LoadHarmonics();
 
  if (ptcmgr->IsReady()) {
    SetbShowTide(bShow);
 
    parent_frame->SetMenubarItemState(ID_MENU_SHOW_TIDES, bShow);
  } else {
    wxLogMessage("Chart1::Event...TCMgr Not Available");
    SetbShowTide(false);
    parent_frame->SetMenubarItemState(ID_MENU_SHOW_TIDES, false);
  }
 
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
 
  // TODO
  //     if( GetbShowTide() ) {
  //         FrameTCTimer.Start( TIMER_TC_VALUE_SECONDS * 1000,
  //         wxTIMER_CONTINUOUS ); SetbTCUpdate( true ); // force immediate
  //         update
  //     } else
  //         FrameTCTimer.Stop();
}
 
void ChartCanvas::ShowCurrents(bool bShow) {
  gFrame->LoadHarmonics();
 
  if (ptcmgr->IsReady()) {
    SetbShowCurrent(bShow);
    parent_frame->SetMenubarItemState(ID_MENU_SHOW_CURRENTS, bShow);
  } else {
    wxLogMessage("Chart1::Event...TCMgr Not Available");
    SetbShowCurrent(false);
    parent_frame->SetMenubarItemState(ID_MENU_SHOW_CURRENTS, false);
  }
 
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
 
  // TODO
  //     if( GetbShowCurrent() ) {
  //         FrameTCTimer.Start( TIMER_TC_VALUE_SECONDS * 1000,
  //         wxTIMER_CONTINUOUS ); SetbTCUpdate( true ); // force immediate
  //         update
  //     } else
  //         FrameTCTimer.Stop();
}
 
// TODO
static ChartDummy *pDummyChart;
 
ChartCanvas *g_overlayCanvas;
ChartCanvas *g_focusCanvas;
 
void ChartCanvas::canvasRefreshGroupIndex() { SetGroupIndex(m_groupIndex); }
 
void ChartCanvas::SetGroupIndex(int index, bool autoSwitch) {
  SetAlertString("");
 
  int new_index = index;
  if (index > (int)g_pGroupArray->GetCount()) new_index = 0;
 
  bool bgroup_override = false;
  int old_group_index = new_index;
 
  if (!CheckGroup(new_index)) {
    new_index = 0;
    bgroup_override = true;
  }
 
  if (!autoSwitch && (index <= (int)g_pGroupArray->GetCount()))
    new_index = index;
 
  //    Get the currently displayed chart native scale, and the current ViewPort
  int current_chart_native_scale = GetCanvasChartNativeScale();
  ViewPort vp = GetVP();
 
  m_groupIndex = new_index;
 
  // Are there  ENCs in this group
  if (ChartData) m_bENCGroup = ChartData->IsENCInGroup(m_groupIndex);
 
  //  Update the MUIBar for ENC availability
  if (m_muiBar) m_muiBar->SetCanvasENCAvailable(m_bENCGroup);
 
  //  Allow the chart database to pre-calculate the MBTile inclusion test
  //  boolean...
  ChartData->CheckExclusiveTileGroup(m_canvasIndex);
 
  //  Invalidate the "sticky" chart on group change, since it might not be in
  //  the new group
  g_sticky_chart = -1;
 
  //    We need a chartstack and quilt to figure out which chart to open in the
  //    new group
  UpdateCanvasOnGroupChange();
 
  int dbi_now = -1;
  if (GetQuiltMode()) dbi_now = GetQuiltReferenceChartIndex();
 
  int dbi_hint = FindClosestCanvasChartdbIndex(current_chart_native_scale);
 
  // If a new reference chart is indicated, set a good scale for it.
  if ((dbi_now != dbi_hint) || !GetQuiltMode()) {
    double best_scale = GetBestStartScale(dbi_hint, vp);
    SetVPScale(best_scale);
  }
 
  if (GetQuiltMode()) dbi_hint = GetQuiltReferenceChartIndex();
 
  //    Refresh the canvas, selecting the "best" chart,
  //    applying the prior ViewPort exactly
  canvasChartsRefresh(dbi_hint);
 
  UpdateCanvasControlBar();
 
  if (!autoSwitch && bgroup_override) {
    // show a short timed message box
    wxString msg(_("Group \""));
 
    ChartGroup *pGroup = g_pGroupArray->Item(new_index - 1);
    msg += pGroup->m_group_name;
 
    msg += _("\" is empty.");
 
    OCPNMessageBox(this, msg, _("OpenCPN Group Notice"), wxICON_INFORMATION, 2);
 
    return;
  }
 
  //    Message box is deferred so that canvas refresh occurs properly before
  //    dialog
  if (bgroup_override) {
    wxString msg(_("Group \""));
 
    ChartGroup *pGroup = g_pGroupArray->Item(old_group_index - 1);
    msg += pGroup->m_group_name;
 
    msg += _("\" is empty, switching to \"All Active Charts\" group.");
 
    OCPNMessageBox(this, msg, _("OpenCPN Group Notice"), wxOK, 5);
  }
}
 
bool ChartCanvas::CheckGroup(int igroup) {
  if (!ChartData) return true;  //  Not known yet...
 
  if (igroup == 0) return true;  // "all charts" is always OK
 
  if (igroup < 0)  // negative group is an error
    return false;
 
  ChartGroup *pGroup = g_pGroupArray->Item(igroup - 1);
 
  if (pGroup->m_element_array.empty())  //  truly empty group prompts a warning,
                                        //  and auto-shift to group 0
    return false;
 
  for (const auto &elem : pGroup->m_element_array) {
    for (unsigned int ic = 0;
         ic < (unsigned int)ChartData->GetChartTableEntries(); ic++) {
      ChartTableEntry *pcte = ChartData->GetpChartTableEntry(ic);
      wxString chart_full_path(pcte->GetpFullPath(), wxConvUTF8);
 
      if (chart_full_path.StartsWith(elem.m_element_name)) return true;
    }
  }
 
  //  If necessary, check for GSHHS
  for (const auto &elem : pGroup->m_element_array) {
    const wxString &element_root = elem.m_element_name;
    wxString test_string = "GSHH";
    if (element_root.Upper().Contains(test_string)) return true;
  }
 
  return false;
}
 
void ChartCanvas::canvasChartsRefresh(int dbi_hint) {
  if (!ChartData) return;
 
  AbstractPlatform::ShowBusySpinner();
 
  double old_scale = GetVPScale();
  InvalidateQuilt();
  SetQuiltRefChart(-1);
 
  m_singleChart = NULL;
 
  // delete m_pCurrentStack;
  // m_pCurrentStack = NULL;
 
  //    Build a new ChartStack
  if (!m_pCurrentStack) {
    m_pCurrentStack = new ChartStack;
    ChartData->BuildChartStack(m_pCurrentStack, m_vLat, m_vLon, m_groupIndex);
  }
 
  if (-1 != dbi_hint) {
    if (GetQuiltMode()) {
      GetpCurrentStack()->SetCurrentEntryFromdbIndex(dbi_hint);
      SetQuiltRefChart(dbi_hint);
    } else {
      //      Open the saved chart
      ChartBase *pTentative_Chart;
      pTentative_Chart = ChartData->OpenChartFromDB(dbi_hint, FULL_INIT);
 
      if (pTentative_Chart) {
        /* m_singleChart is always NULL here, (set above) should this go before
         * that? */
        if (m_singleChart) m_singleChart->Deactivate();
 
        m_singleChart = pTentative_Chart;
        m_singleChart->Activate();
 
        GetpCurrentStack()->CurrentStackEntry = ChartData->GetStackEntry(
            GetpCurrentStack(), m_singleChart->GetFullPath());
      }
    }
 
    // refresh_Piano();
  } else {
    //    Select reference chart from the stack, as though clicked by user
    //    Make it the smallest scale chart on the stack
    GetpCurrentStack()->CurrentStackEntry = GetpCurrentStack()->nEntry - 1;
    int selected_index = GetpCurrentStack()->GetCurrentEntrydbIndex();
    SetQuiltRefChart(selected_index);
  }
 
  //    Validate the correct single chart, or set the quilt mode as appropriate
  SetupCanvasQuiltMode();
  if (!GetQuiltMode() && m_singleChart == 0) {
    // use a dummy like in DoChartUpdate
    if (NULL == pDummyChart) pDummyChart = new ChartDummy;
    m_singleChart = pDummyChart;
    SetVPScale(old_scale);
  }
 
  ReloadVP();
 
  UpdateCanvasControlBar();
  UpdateGPSCompassStatusBox(true);
 
  SetCursor(wxCURSOR_ARROW);
 
  AbstractPlatform::HideBusySpinner();
}
 
bool ChartCanvas::DoCanvasUpdate() {
  double tLat, tLon;    // Chart Stack location
  double vpLat, vpLon;  // ViewPort location
  bool blong_jump = false;
  meters_to_shift = 0;
  dir_to_shift = 0;
 
  bool bNewChart = false;
  bool bNewView = false;
  bool bCanvasChartAutoOpen = true;  // debugging
 
  bool bNewPiano = false;
  bool bOpenSpecified;
  ChartStack LastStack;
  ChartBase *pLast_Ch;
 
  ChartStack WorkStack;
 
  if (bDBUpdateInProgress) return false;
  if (!ChartData) return false;
 
  if (ChartData->IsBusy()) return false;
  if (m_chart_drag_inertia_active) return false;
 
  //    Startup case:
  //    Quilting is enabled, but the last chart seen was not quiltable
  //    In this case, drop to single chart mode, set persistence flag,
  //    And open the specified chart
  // TODO implement this
  //     if( m_bFirstAuto && ( g_restore_dbindex >= 0 ) ) {
  //         if( GetQuiltMode() ) {
  //             if( !IsChartQuiltableRef( g_restore_dbindex ) ) {
  //                 gFrame->ToggleQuiltMode();
  //                 m_bpersistent_quilt = true;
  //                 m_singleChart = NULL;
  //             }
  //         }
  //     }
 
  //      If in auto-follow mode, use the current glat,glon to build chart
  //      stack. Otherwise, use vLat, vLon gotten from click on chart canvas, or
  //      other means
 
  if (m_bFollow) {
    tLat = gLat;
    tLon = gLon;
 
    // Set the ViewPort center based on the OWNSHIP offset
    double dx = m_OSoffsetx;
    double dy = m_OSoffsety;
    double d_east = dx / GetVP().view_scale_ppm;
    double d_north = dy / GetVP().view_scale_ppm;
 
    if (GetUpMode() == NORTH_UP_MODE) {
      fromSM(d_east, d_north, gLat, gLon, &vpLat, &vpLon);
    } else {
      double offset_angle = atan2(d_north, d_east);
      double offset_distance = sqrt((d_north * d_north) + (d_east * d_east));
      double chart_angle = GetVPRotation();
      double target_angle = chart_angle + offset_angle;
      double d_east_mod = offset_distance * cos(target_angle);
      double d_north_mod = offset_distance * sin(target_angle);
      fromSM(d_east_mod, d_north_mod, gLat, gLon, &vpLat, &vpLon);
    }
 
    // on lookahead mode, adjust the vp center point
    if (m_bLookAhead && bGPSValid && !m_MouseDragging) {
      double cog_to_use = gCog;
      if (g_btenhertz &&
          (fabs(gCog - gCog_gt) > 20)) {  // big COG change in process
        cog_to_use = gCog_gt;
        blong_jump = true;
      }
      if (!g_btenhertz) cog_to_use = g_COGAvg;
 
      double angle = cog_to_use + (GetVPRotation() * 180. / PI);
 
      double pixel_deltay = (cos(angle * PI / 180.)) * GetCanvasHeight() / 4;
      double pixel_deltax = (sin(angle * PI / 180.)) * GetCanvasWidth() / 4;
 
      double pixel_delta_tent =
          sqrt((pixel_deltay * pixel_deltay) + (pixel_deltax * pixel_deltax));
 
      double pixel_delta = 0;
 
      //    The idea here is to cancel the effect of LookAhead for slow gSog, to
      //    avoid jumping of the vp center point during slow maneuvering, or at
      //    anchor....
      if (!std::isnan(gSog)) {
        if (gSog < 2.0)
          pixel_delta = 0.;
        else
          pixel_delta = pixel_delta_tent;
      }
 
      meters_to_shift = 0;
      dir_to_shift = 0;
      if (!std::isnan(gCog)) {
        meters_to_shift = cos(gLat * PI / 180.) * pixel_delta / GetVPScale();
        dir_to_shift = cog_to_use;
        ll_gc_ll(gLat, gLon, dir_to_shift, meters_to_shift / 1852., &vpLat,
                 &vpLon);
      } else {
        vpLat = gLat;
        vpLon = gLon;
      }
    } else if (m_bLookAhead && (!bGPSValid || m_MouseDragging)) {
      m_OSoffsetx = 0;  // center ownship on loss of GPS
      m_OSoffsety = 0;
      vpLat = gLat;
      vpLon = gLon;
    }
 
  } else {
    tLat = m_vLat;
    tLon = m_vLon;
    vpLat = m_vLat;
    vpLon = m_vLon;
  }
 
  if (GetQuiltMode()) {
    int current_db_index = -1;
    if (m_pCurrentStack)
      current_db_index =
          m_pCurrentStack
              ->GetCurrentEntrydbIndex();  // capture the currently selected Ref
                                           // chart dbIndex
    else
      m_pCurrentStack = new ChartStack;
 
    //  This logic added to enable opening a chart when there is no
    //  previous chart indication, either from inital startup, or from adding
    //  new chart directory
    if (m_bautofind && (-1 == GetQuiltReferenceChartIndex()) &&
        m_pCurrentStack) {
      if (m_pCurrentStack->nEntry) {
        int new_dbIndex = m_pCurrentStack->GetDBIndex(m_pCurrentStack->nEntry -
                                                      1);  // smallest scale
        SelectQuiltRefdbChart(new_dbIndex, true);
        m_bautofind = false;
      }
    }
 
    ChartData->BuildChartStack(m_pCurrentStack, tLat, tLon, m_groupIndex);
    m_pCurrentStack->SetCurrentEntryFromdbIndex(current_db_index);
 
    if (m_bFirstAuto) {
      //  Allow the chart database to pre-calculate the MBTile inclusion test
      //  boolean...
      ChartData->CheckExclusiveTileGroup(m_canvasIndex);
 
      // Calculate DPI compensation scale, i.e., the ratio of logical pixels to
      // physical pixels. On standard DPI displays where logical = physical
      // pixels, this ratio would be 1.0. On Retina displays where physical = 2x
      // logical pixels, this ratio would be 0.5.
      double proposed_scale_onscreen =
          GetCanvasScaleFactor() / GetVPScale();  // as set from config load
 
      int initial_db_index = m_restore_dbindex;
      if (initial_db_index < 0) {
        if (m_pCurrentStack->nEntry) {
          initial_db_index =
              m_pCurrentStack->GetDBIndex(m_pCurrentStack->nEntry - 1);
        } else
          m_bautofind = true;  // initial_db_index = 0;
      }
 
      if (m_pCurrentStack->nEntry) {
        int initial_type = ChartData->GetDBChartType(initial_db_index);
 
        //    Check to see if the target new chart is quiltable as a reference
        //    chart
 
        if (!IsChartQuiltableRef(initial_db_index)) {
          // If it is not quiltable, then walk the stack up looking for a
          // satisfactory chart i.e. one that is quiltable and of the same type
          // XXX if there's none?
          int stack_index = 0;
 
          if (stack_index >= 0) {
            while ((stack_index < m_pCurrentStack->nEntry - 1)) {
              int test_db_index = m_pCurrentStack->GetDBIndex(stack_index);
              if (IsChartQuiltableRef(test_db_index) &&
                  (initial_type ==
                   ChartData->GetDBChartType(initial_db_index))) {
                initial_db_index = test_db_index;
                break;
              }
              stack_index++;
            }
          }
        }
 
        ChartBase *pc = ChartData->OpenChartFromDB(initial_db_index, FULL_INIT);
        if (pc) {
          SetQuiltRefChart(initial_db_index);
          m_pCurrentStack->SetCurrentEntryFromdbIndex(initial_db_index);
        }
      }
      // TODO: GetCanvasScaleFactor() / proposed_scale_onscreen simplifies to
      // just GetVPScale(), so I'm not sure why it's necessary to define the
      // proposed_scale_onscreen variable.
      bNewView |= SetViewPoint(vpLat, vpLon,
                               GetCanvasScaleFactor() / proposed_scale_onscreen,
                               0, GetVPRotation());
    }
    // Measure rough jump distance if in bfollow mode
    // No good reason to do smooth pan for
    // jump distance more than one screen width at scale.
    bool super_jump = false;
    if (m_bFollow) {
      double pixlt = fabs(vpLat - m_vLat) * 1852 * 60 * GetVPScale();
      double pixlg = fabs(vpLon - m_vLon) * 1852 * 60 * GetVPScale();
      if (wxMax(pixlt, pixlg) > GetCanvasWidth()) super_jump = true;
    }
#if 0
    if (m_bFollow && g_btenhertz && !super_jump && !m_bLookAhead && !g_btouch && !m_bzooming) {
      int nstep = 5;
      if (blong_jump) nstep = 20;
      StartTimedMovementVP(vpLat, vpLon, nstep);
    } else
#endif
    {
      bNewView |= SetViewPoint(vpLat, vpLon, GetVPScale(), 0, GetVPRotation());
    }
 
    goto update_finish;
  }
 
  //  Single Chart Mode from here....
  pLast_Ch = m_singleChart;
  ChartTypeEnum new_open_type;
  ChartFamilyEnum new_open_family;
  if (pLast_Ch) {
    new_open_type = pLast_Ch->GetChartType();
    new_open_family = pLast_Ch->GetChartFamily();
  } else {
    new_open_type = CHART_TYPE_KAP;
    new_open_family = CHART_FAMILY_RASTER;
  }
 
  bOpenSpecified = m_bFirstAuto;
 
  //  Make sure the target stack is valid
  if (NULL == m_pCurrentStack) m_pCurrentStack = new ChartStack;
 
  // Build a chart stack based on tLat, tLon
  if (0 == ChartData->BuildChartStack(&WorkStack, tLat, tLon, g_sticky_chart,
                                      m_groupIndex)) {  // Bogus Lat, Lon?
    if (NULL == pDummyChart) {
      pDummyChart = new ChartDummy;
      bNewChart = true;
    }
 
    if (m_singleChart)
      if (m_singleChart->GetChartType() != CHART_TYPE_DUMMY) bNewChart = true;
 
    m_singleChart = pDummyChart;
 
    //    If the current viewpoint is invalid, set the default scale to
    //    something reasonable.
    double set_scale = GetVPScale();
    if (!GetVP().IsValid()) set_scale = 1. / 20000.;
 
    bNewView |= SetViewPoint(tLat, tLon, set_scale, 0, GetVPRotation());
 
    //      If the chart stack has just changed, there is new status
    if (WorkStack.nEntry && m_pCurrentStack->nEntry) {
      if (!ChartData->EqualStacks(&WorkStack, m_pCurrentStack)) {
        bNewPiano = true;
        bNewChart = true;
      }
    }
 
    //      Copy the new (by definition empty) stack into the target stack
    ChartData->CopyStack(m_pCurrentStack, &WorkStack);
 
    goto update_finish;
  }
 
  //              Check to see if Chart Stack has changed
  if (!ChartData->EqualStacks(&WorkStack, m_pCurrentStack)) {
    //      New chart stack, so...
    bNewPiano = true;
 
    //      Save a copy of the current stack
    ChartData->CopyStack(&LastStack, m_pCurrentStack);
 
    //      Copy the new stack into the target stack
    ChartData->CopyStack(m_pCurrentStack, &WorkStack);
 
    //  Is Current Chart in new stack?
 
    int tEntry = -1;
    if (NULL != m_singleChart)  // this handles startup case
      tEntry = ChartData->GetStackEntry(m_pCurrentStack,
                                        m_singleChart->GetFullPath());
 
    if (tEntry != -1) {  // m_singleChart is in the new stack
      m_pCurrentStack->CurrentStackEntry = tEntry;
      bNewChart = false;
    }
 
    else  // m_singleChart is NOT in new stack
    {     // So, need to open a new chart
      //      Find the largest scale raster chart that opens OK
 
      ChartBase *pProposed = NULL;
 
      if (bCanvasChartAutoOpen) {
        bool search_direction =
            false;  // default is to search from lowest to highest
        int start_index = 0;
 
        //    A special case:  If panning at high scale, open largest scale
        //    chart first
        if ((LastStack.CurrentStackEntry == LastStack.nEntry - 1) ||
            (LastStack.nEntry == 0)) {
          search_direction = true;
          start_index = m_pCurrentStack->nEntry - 1;
        }
 
        //    Another special case, open specified index on program start
        if (bOpenSpecified) {
          search_direction = false;
          start_index = 0;
          if ((start_index < 0) | (start_index >= m_pCurrentStack->nEntry))
            start_index = 0;
 
          new_open_type = CHART_TYPE_DONTCARE;
        }
 
        pProposed = ChartData->OpenStackChartConditional(
            m_pCurrentStack, start_index, search_direction, new_open_type,
            new_open_family);
 
        //    Try to open other types/families of chart in some priority
        if (NULL == pProposed)
          pProposed = ChartData->OpenStackChartConditional(
              m_pCurrentStack, start_index, search_direction,
              CHART_TYPE_CM93COMP, CHART_FAMILY_VECTOR);
 
        if (NULL == pProposed)
          pProposed = ChartData->OpenStackChartConditional(
              m_pCurrentStack, start_index, search_direction,
              CHART_TYPE_CM93COMP, CHART_FAMILY_RASTER);
 
        bNewChart = true;
 
      }  // bCanvasChartAutoOpen
 
      else
        pProposed = NULL;
 
      //  If no go, then
      //  Open a Dummy Chart
      if (NULL == pProposed) {
        if (NULL == pDummyChart) {
          pDummyChart = new ChartDummy;
          bNewChart = true;
        }
 
        if (pLast_Ch)
          if (pLast_Ch->GetChartType() != CHART_TYPE_DUMMY) bNewChart = true;
 
        pProposed = pDummyChart;
      }
 
      // Arriving here, pProposed points to an opened chart, or NULL.
      if (m_singleChart) m_singleChart->Deactivate();
      m_singleChart = pProposed;
 
      if (m_singleChart) {
        m_singleChart->Activate();
        m_pCurrentStack->CurrentStackEntry = ChartData->GetStackEntry(
            m_pCurrentStack, m_singleChart->GetFullPath());
      }
    }  // need new chart
 
    // Arriving here, m_singleChart is opened and OK, or NULL
    if (NULL != m_singleChart) {
      //      Setup the view using the current scale
      double set_scale = GetVPScale();
 
      //    If the current viewpoint is invalid, set the default scale to
      //    something reasonable.
      if (!GetVP().IsValid())
        set_scale = 1. / 20000.;
      else {  // otherwise, match scale if elected.
        double proposed_scale_onscreen;
 
        if (m_bFollow) {  // autoset the scale only if in autofollow
          double new_scale_ppm =
              m_singleChart->GetNearestPreferredScalePPM(GetVPScale());
          proposed_scale_onscreen = GetCanvasScaleFactor() / new_scale_ppm;
        } else
          proposed_scale_onscreen = GetCanvasScaleFactor() / set_scale;
 
        //  This logic will bring a new chart onscreen at roughly twice the true
        //  paper scale equivalent. Note that first chart opened on application
        //  startup (bOpenSpecified = true) will open at the config saved scale
        if (bNewChart && !g_bPreserveScaleOnX && !bOpenSpecified) {
          proposed_scale_onscreen = m_singleChart->GetNativeScale() / 2;
          double equivalent_vp_scale =
              GetCanvasScaleFactor() / proposed_scale_onscreen;
          double new_scale_ppm =
              m_singleChart->GetNearestPreferredScalePPM(equivalent_vp_scale);
          proposed_scale_onscreen = GetCanvasScaleFactor() / new_scale_ppm;
        }
 
        if (m_bFollow) {  // bounds-check the scale only if in autofollow
          proposed_scale_onscreen =
              wxMin(proposed_scale_onscreen,
                    m_singleChart->GetNormalScaleMax(GetCanvasScaleFactor(),
                                                     GetCanvasWidth()));
          proposed_scale_onscreen =
              wxMax(proposed_scale_onscreen,
                    m_singleChart->GetNormalScaleMin(GetCanvasScaleFactor(),
                                                     g_b_overzoom_x));
        }
 
        set_scale = GetCanvasScaleFactor() / proposed_scale_onscreen;
      }
 
      bNewView |= SetViewPoint(vpLat, vpLon, set_scale,
                               m_singleChart->GetChartSkew() * PI / 180.,
                               GetVPRotation());
    }
  }  // new stack
 
  else  // No change in Chart Stack
  {
    if ((m_bFollow) && m_singleChart)
      bNewView |= SetViewPoint(vpLat, vpLon, GetVPScale(),
                               m_singleChart->GetChartSkew() * PI / 180.,
                               GetVPRotation());
  }
 
update_finish:
 
  // TODO
  //     if( bNewPiano ) UpdateControlBar();
 
  m_bFirstAuto = false;  // Auto open on program start
 
  //  If we need a Refresh(), do it here...
  //  But don't duplicate a Refresh() done by SetViewPoint()
  if (bNewChart && !bNewView) Refresh(false);
 
#ifdef ocpnUSE_GL
  // If a new chart, need to invalidate gl viewport for refresh
  // so the fbo gets flushed
  if (m_glcc && g_bopengl && bNewChart) GetglCanvas()->Invalidate();
#endif
 
  return bNewChart | bNewView;
}
 
void ChartCanvas::SelectQuiltRefdbChart(int db_index, bool b_autoscale) {
  if (m_pCurrentStack) m_pCurrentStack->SetCurrentEntryFromdbIndex(db_index);
 
  SetQuiltRefChart(db_index);
  if (ChartData) {
    ChartBase *pc = ChartData->OpenChartFromDB(db_index, FULL_INIT);
    if (pc) {
      if (b_autoscale) {
        double best_scale_ppm = GetBestVPScale(pc);
        SetVPScale(best_scale_ppm);
      }
    } else
      SetQuiltRefChart(-1);
  } else
    SetQuiltRefChart(-1);
}
 
void ChartCanvas::SelectQuiltRefChart(int selected_index) {
  std::vector<int> piano_chart_index_array =
      GetQuiltExtendedStackdbIndexArray();
  int current_db_index = piano_chart_index_array[selected_index];
 
  SelectQuiltRefdbChart(current_db_index);
}
 
double ChartCanvas::GetBestVPScale(ChartBase *pchart) {
  if (pchart) {
    double proposed_scale_onscreen = GetCanvasScaleFactor() / GetVPScale();
 
    if ((g_bPreserveScaleOnX) ||
        (CHART_TYPE_CM93COMP == pchart->GetChartType())) {
      double new_scale_ppm = GetVPScale();
      proposed_scale_onscreen = GetCanvasScaleFactor() / new_scale_ppm;
    } else {
      //  This logic will bring the new chart onscreen at roughly twice the true
      //  paper scale equivalent.
      proposed_scale_onscreen = pchart->GetNativeScale() / 2;
      double equivalent_vp_scale =
          GetCanvasScaleFactor() / proposed_scale_onscreen;
      double new_scale_ppm =
          pchart->GetNearestPreferredScalePPM(equivalent_vp_scale);
      proposed_scale_onscreen = GetCanvasScaleFactor() / new_scale_ppm;
    }
 
    // Do not allow excessive underzoom, even if the g_bPreserveScaleOnX flag is
    // set. Otherwise, we get severe performance problems on all platforms
 
    double max_underzoom_multiplier = 2.0;
    if (GetVP().b_quilt) {
      double scale_max = m_pQuilt->GetNomScaleMin(pchart->GetNativeScale(),
                                                  pchart->GetChartType(),
                                                  pchart->GetChartFamily());
      max_underzoom_multiplier = scale_max / pchart->GetNativeScale();
    }
 
    proposed_scale_onscreen = wxMin(
        proposed_scale_onscreen,
        pchart->GetNormalScaleMax(GetCanvasScaleFactor(), GetCanvasWidth()) *
            max_underzoom_multiplier);
 
    //  And, do not allow excessive overzoom either
    proposed_scale_onscreen =
        wxMax(proposed_scale_onscreen,
              pchart->GetNormalScaleMin(GetCanvasScaleFactor(), false));
 
    return GetCanvasScaleFactor() / proposed_scale_onscreen;
  } else
    return 1.0;
}
 
void ChartCanvas::SetupCanvasQuiltMode() {
  if (GetQuiltMode())  // going to quilt mode
  {
    ChartData->LockCache();
 
    m_Piano->SetNoshowIndexArray(m_quilt_noshow_index_array);
 
    ocpnStyle::Style *style = g_StyleManager->GetCurrentStyle();
 
    m_Piano->SetVizIcon(new wxBitmap(style->GetIcon("viz")));
    m_Piano->SetInVizIcon(new wxBitmap(style->GetIcon("redX")));
    m_Piano->SetTMercIcon(new wxBitmap(style->GetIcon("tmercprj")));
    m_Piano->SetSkewIcon(new wxBitmap(style->GetIcon("skewprj")));
 
    m_Piano->SetRoundedRectangles(true);
 
    //    Select the proper Ref chart
    int target_new_dbindex = -1;
    if (m_pCurrentStack) {
      target_new_dbindex =
          GetQuiltReferenceChartIndex();  // m_pCurrentStack->GetCurrentEntrydbIndex();
 
      if (-1 != target_new_dbindex) {
        if (!IsChartQuiltableRef(target_new_dbindex)) {
          int proj = ChartData->GetDBChartProj(target_new_dbindex);
          int type = ChartData->GetDBChartType(target_new_dbindex);
 
          // walk the stack up looking for a satisfactory chart
          int stack_index = m_pCurrentStack->CurrentStackEntry;
 
          while ((stack_index < m_pCurrentStack->nEntry - 1) &&
                 (stack_index >= 0)) {
            int proj_tent = ChartData->GetDBChartProj(
                m_pCurrentStack->GetDBIndex(stack_index));
            int type_tent = ChartData->GetDBChartType(
                m_pCurrentStack->GetDBIndex(stack_index));
 
            if (IsChartQuiltableRef(m_pCurrentStack->GetDBIndex(stack_index))) {
              if ((proj == proj_tent) && (type_tent == type)) {
                target_new_dbindex = m_pCurrentStack->GetDBIndex(stack_index);
                break;
              }
            }
            stack_index++;
          }
        }
      }
    }
 
    if (IsChartQuiltableRef(target_new_dbindex))
      SelectQuiltRefdbChart(target_new_dbindex,
                            false);  // Try not to allow a scale change
    else
      SelectQuiltRefdbChart(-1, false);
 
    m_singleChart = NULL;  // Bye....
 
    //  Re-qualify the quilt reference chart selection
    AdjustQuiltRefChart();
 
    //  Restore projection type saved on last quilt mode toggle
    // TODO
    //             if(g_sticky_projection != -1)
    //                 GetVP().SetProjectionType(g_sticky_projection);
    //             else
    //                 GetVP().SetProjectionType(PROJECTION_MERCATOR);
    GetVP().SetProjectionType(PROJECTION_UNKNOWN);
 
  } else  // going to SC Mode
  {
    std::vector<int> empty_array;
    m_Piano->SetActiveKeyArray(empty_array);
    m_Piano->SetNoshowIndexArray(empty_array);
    m_Piano->SetEclipsedIndexArray(empty_array);
 
    ocpnStyle::Style *style = g_StyleManager->GetCurrentStyle();
    m_Piano->SetVizIcon(new wxBitmap(style->GetIcon("viz")));
    m_Piano->SetInVizIcon(new wxBitmap(style->GetIcon("redX")));
    m_Piano->SetTMercIcon(new wxBitmap(style->GetIcon("tmercprj")));
    m_Piano->SetSkewIcon(new wxBitmap(style->GetIcon("skewprj")));
 
    m_Piano->SetRoundedRectangles(false);
    // TODO  Make this a member g_sticky_projection = GetVP().m_projection_type;
  }
 
  //    When shifting from quilt to single chart mode, select the "best" single
  //    chart to show
  if (!GetQuiltMode()) {
    if (ChartData && ChartData->IsValid()) {
      UnlockQuilt();
 
      double tLat, tLon;
      if (m_bFollow == true) {
        tLat = gLat;
        tLon = gLon;
      } else {
        tLat = m_vLat;
        tLon = m_vLon;
      }
 
      if (!m_singleChart) {
        // Build a temporary chart stack based on tLat, tLon
        ChartStack TempStack;
        ChartData->BuildChartStack(&TempStack, tLat, tLon, g_sticky_chart,
                                   m_groupIndex);
 
        //    Iterate over the quilt charts actually shown, looking for the
        //    largest scale chart that will be in the new chartstack.... This
        //    will (almost?) always be the reference chart....
 
        ChartBase *Candidate_Chart = NULL;
        int cur_max_scale = (int)1e8;
 
        ChartBase *pChart = GetFirstQuiltChart();
        while (pChart) {
          //  Is this pChart in new stack?
          int tEntry =
              ChartData->GetStackEntry(&TempStack, pChart->GetFullPath());
          if (tEntry != -1) {
            if (pChart->GetNativeScale() < cur_max_scale) {
              Candidate_Chart = pChart;
              cur_max_scale = pChart->GetNativeScale();
            }
          }
          pChart = GetNextQuiltChart();
        }
 
        m_singleChart = Candidate_Chart;
 
        //    If the quilt is empty, there is no "best" chart.
        //    So, open the smallest scale chart in the current stack
        if (NULL == m_singleChart) {
          m_singleChart = ChartData->OpenStackChartConditional(
              &TempStack, TempStack.nEntry - 1, true, CHART_TYPE_DONTCARE,
              CHART_FAMILY_DONTCARE);
        }
      }
 
      //  Invalidate all the charts in the quilt,
      // as any cached data may be region based and not have fullscreen coverage
      InvalidateAllQuiltPatchs();
 
      if (m_singleChart) {
        int dbi = ChartData->FinddbIndex(m_singleChart->GetFullPath());
        std::vector<int> one_array;
        one_array.push_back(dbi);
        m_Piano->SetActiveKeyArray(one_array);
      }
 
      if (m_singleChart) {
        GetVP().SetProjectionType(m_singleChart->GetChartProjectionType());
      }
    }
    //    Invalidate the current stack so that it will be rebuilt on next tick
    if (m_pCurrentStack) m_pCurrentStack->b_valid = false;
  }
}
 
bool ChartCanvas::IsTempMenuBarEnabled() {
#ifdef __WXMSW__
  int major;
  wxGetOsVersion(&major);
  return (major >
          5);  //  For Windows, function is only available on Vista and above
#else
  return true;
#endif
}
 
double ChartCanvas::GetCanvasRangeMeters() {
  int width, height;
  GetSize(&width, &height);
  int minDimension = wxMin(width, height);
 
  double range = (minDimension / GetVP().view_scale_ppm) / 2;
  range *= cos(GetVP().clat * PI / 180.);
  return range;
}
 
void ChartCanvas::SetCanvasRangeMeters(double range) {
  int width, height;
  GetSize(&width, &height);
  int minDimension = wxMin(width, height);
 
  double scale_ppm = minDimension / (range / cos(GetVP().clat * PI / 180.));
  SetVPScale(scale_ppm / 2);
}
 
bool ChartCanvas::SetUserOwnship() {
  //  Look for user defined ownship image
  //  This may be found in the shared data location along with other user
  //  defined icons. and will be called "ownship.xpm" or "ownship.png"
  if (pWayPointMan && pWayPointMan->DoesIconExist("ownship")) {
    double factor_dusk = 0.5;
    double factor_night = 0.25;
 
    wxBitmap *pbmp = pWayPointMan->GetIconBitmap("ownship");
    m_pos_image_user_day = new wxImage;
    *m_pos_image_user_day = pbmp->ConvertToImage();
    if (!m_pos_image_user_day->HasAlpha()) m_pos_image_user_day->InitAlpha();
 
    int gimg_width = m_pos_image_user_day->GetWidth();
    int gimg_height = m_pos_image_user_day->GetHeight();
 
    // Make dusk and night images
    m_pos_image_user_dusk = new wxImage;
    m_pos_image_user_night = new wxImage;
 
    *m_pos_image_user_dusk = m_pos_image_user_day->Copy();
    *m_pos_image_user_night = m_pos_image_user_day->Copy();
 
    for (int iy = 0; iy < gimg_height; iy++) {
      for (int ix = 0; ix < gimg_width; ix++) {
        if (!m_pos_image_user_day->IsTransparent(ix, iy)) {
          wxImage::RGBValue rgb(m_pos_image_user_day->GetRed(ix, iy),
                                m_pos_image_user_day->GetGreen(ix, iy),
                                m_pos_image_user_day->GetBlue(ix, iy));
          wxImage::HSVValue hsv = wxImage::RGBtoHSV(rgb);
          hsv.value = hsv.value * factor_dusk;
          wxImage::RGBValue nrgb = wxImage::HSVtoRGB(hsv);
          m_pos_image_user_dusk->SetRGB(ix, iy, nrgb.red, nrgb.green,
                                        nrgb.blue);
 
          hsv = wxImage::RGBtoHSV(rgb);
          hsv.value = hsv.value * factor_night;
          nrgb = wxImage::HSVtoRGB(hsv);
          m_pos_image_user_night->SetRGB(ix, iy, nrgb.red, nrgb.green,
                                         nrgb.blue);
        }
      }
    }
 
    //  Make some alternate greyed out day/dusk/night images
    m_pos_image_user_grey_day = new wxImage;
    *m_pos_image_user_grey_day = m_pos_image_user_day->ConvertToGreyscale();
 
    m_pos_image_user_grey_dusk = new wxImage;
    m_pos_image_user_grey_night = new wxImage;
 
    *m_pos_image_user_grey_dusk = m_pos_image_user_grey_day->Copy();
    *m_pos_image_user_grey_night = m_pos_image_user_grey_day->Copy();
 
    for (int iy = 0; iy < gimg_height; iy++) {
      for (int ix = 0; ix < gimg_width; ix++) {
        if (!m_pos_image_user_grey_day->IsTransparent(ix, iy)) {
          wxImage::RGBValue rgb(m_pos_image_user_grey_day->GetRed(ix, iy),
                                m_pos_image_user_grey_day->GetGreen(ix, iy),
                                m_pos_image_user_grey_day->GetBlue(ix, iy));
          wxImage::HSVValue hsv = wxImage::RGBtoHSV(rgb);
          hsv.value = hsv.value * factor_dusk;
          wxImage::RGBValue nrgb = wxImage::HSVtoRGB(hsv);
          m_pos_image_user_grey_dusk->SetRGB(ix, iy, nrgb.red, nrgb.green,
                                             nrgb.blue);
 
          hsv = wxImage::RGBtoHSV(rgb);
          hsv.value = hsv.value * factor_night;
          nrgb = wxImage::HSVtoRGB(hsv);
          m_pos_image_user_grey_night->SetRGB(ix, iy, nrgb.red, nrgb.green,
                                              nrgb.blue);
        }
      }
    }
 
    //  Make a yellow image for rendering under low accuracy chart conditions
    m_pos_image_user_yellow_day = new wxImage;
    m_pos_image_user_yellow_dusk = new wxImage;
    m_pos_image_user_yellow_night = new wxImage;
 
    *m_pos_image_user_yellow_day = m_pos_image_user_grey_day->Copy();
    *m_pos_image_user_yellow_dusk = m_pos_image_user_grey_day->Copy();
    *m_pos_image_user_yellow_night = m_pos_image_user_grey_day->Copy();
 
    for (int iy = 0; iy < gimg_height; iy++) {
      for (int ix = 0; ix < gimg_width; ix++) {
        if (!m_pos_image_user_grey_day->IsTransparent(ix, iy)) {
          wxImage::RGBValue rgb(m_pos_image_user_grey_day->GetRed(ix, iy),
                                m_pos_image_user_grey_day->GetGreen(ix, iy),
                                m_pos_image_user_grey_day->GetBlue(ix, iy));
 
          //  Simply remove all "blue" from the greyscaled image...
          //  so, what is not black becomes yellow.
          wxImage::HSVValue hsv = wxImage::RGBtoHSV(rgb);
          wxImage::RGBValue nrgb = wxImage::HSVtoRGB(hsv);
          m_pos_image_user_yellow_day->SetRGB(ix, iy, nrgb.red, nrgb.green, 0);
 
          hsv = wxImage::RGBtoHSV(rgb);
          hsv.value = hsv.value * factor_dusk;
          nrgb = wxImage::HSVtoRGB(hsv);
          m_pos_image_user_yellow_dusk->SetRGB(ix, iy, nrgb.red, nrgb.green, 0);
 
          hsv = wxImage::RGBtoHSV(rgb);
          hsv.value = hsv.value * factor_night;
          nrgb = wxImage::HSVtoRGB(hsv);
          m_pos_image_user_yellow_night->SetRGB(ix, iy, nrgb.red, nrgb.green,
                                                0);
        }
      }
    }
 
    return true;
  } else
    return false;
}
 
void ChartCanvas::SetDisplaySizeMM(double size) {
  m_display_size_mm = size;
 
  // int sx, sy;
  // wxDisplaySize( &sx, &sy );
 
  // Calculate logical pixels per mm for later reference.
  wxSize sd = g_Platform->getDisplaySize();
  double horizontal = sd.x;
  // Set DPI (Win) scale factor
  g_scaler = g_Platform->GetDisplayDIPMult(this);
 
  m_pix_per_mm = (horizontal) / ((double)m_display_size_mm);
  m_canvas_scale_factor = (horizontal) / (m_display_size_mm / 1000.);
 
  if (ps52plib) {
    ps52plib->SetDisplayWidth(g_monitor_info[g_current_monitor].width);
    ps52plib->SetPPMM(m_pix_per_mm);
  }
 
  wxString msg;
  msg.Printf(
      "Metrics:  m_display_size_mm: %g     g_Platform->getDisplaySize():  "
      "%d:%d   ",
      m_display_size_mm, sd.x, sd.y);
  wxLogDebug(msg);
 
  int ssx, ssy;
  ssx = g_monitor_info[g_current_monitor].width;
  ssy = g_monitor_info[g_current_monitor].height;
  msg.Printf("monitor size: %d %d", ssx, ssy);
  wxLogDebug(msg);
 
  m_focus_indicator_pix = /*std::round*/ wxRound(1 * GetPixPerMM());
}
#if 0
void ChartCanvas::OnEvtCompressProgress( OCPN_CompressProgressEvent & event )
{
    wxString msg(event.m_string.c_str(), wxConvUTF8);
    // if cpus are removed between runs
    if(pprog_threads > 0 && compress_msg_array.GetCount() >  (unsigned int)pprog_threads) {
        compress_msg_array.RemoveAt(pprog_threads, compress_msg_array.GetCount() - pprog_threads);
    }
 
    if(compress_msg_array.GetCount() > (unsigned int)event.thread )
    {
        compress_msg_array.RemoveAt(event.thread);
        compress_msg_array.Insert( msg, event.thread);
    }
    else
        compress_msg_array.Add(msg);
 
 
    wxString combined_msg;
    for(unsigned int i=0 ; i < compress_msg_array.GetCount() ; i++) {
        combined_msg += compress_msg_array[i];
        combined_msg += "\n";
    }
 
    bool skip = false;
    pprog->Update(pprog_count, combined_msg, &skip );
    pprog->SetSize(pprog_size);
    if(skip)
        b_skipout = skip;
}
#endif
void ChartCanvas::InvalidateGL() {
  if (!m_glcc) return;
#ifdef ocpnUSE_GL
  if (g_bopengl) m_glcc->Invalidate();
#endif
  if (m_Compass) m_Compass->UpdateStatus(true);
}
 
int ChartCanvas::GetCanvasChartNativeScale() {
  int ret = 1;
  if (!VPoint.b_quilt) {
    if (m_singleChart) ret = m_singleChart->GetNativeScale();
  } else
    ret = (int)m_pQuilt->GetRefNativeScale();
 
  return ret;
}
 
ChartBase *ChartCanvas::GetChartAtCursor() {
  ChartBase *target_chart;
  if (m_singleChart && (m_singleChart->GetChartFamily() == CHART_FAMILY_VECTOR))
    target_chart = m_singleChart;
  else if (VPoint.b_quilt)
    target_chart = m_pQuilt->GetChartAtPix(VPoint, wxPoint(mouse_x, mouse_y));
  else
    target_chart = NULL;
  return target_chart;
}
 
ChartBase *ChartCanvas::GetOverlayChartAtCursor() {
  ChartBase *target_chart;
  if (VPoint.b_quilt)
    target_chart =
        m_pQuilt->GetOverlayChartAtPix(VPoint, wxPoint(mouse_x, mouse_y));
  else
    target_chart = NULL;
  return target_chart;
}
 
int ChartCanvas::FindClosestCanvasChartdbIndex(int scale) {
  int new_dbIndex = -1;
  if (!VPoint.b_quilt) {
    if (m_pCurrentStack) {
      for (int i = 0; i < m_pCurrentStack->nEntry; i++) {
        int sc = ChartData->GetStackChartScale(m_pCurrentStack, i, NULL, 0);
        if (sc >= scale) {
          new_dbIndex = m_pCurrentStack->GetDBIndex(i);
          break;
        }
      }
    }
  } else {
    //    Using the current quilt, select a useable reference chart
    //    Said chart will be in the extended (possibly full-screen) stack,
    //    And will have a scale equal to or just greater than the stipulated
    //    value
    unsigned int im = m_pQuilt->GetExtendedStackIndexArray().size();
    if (im > 0) {
      for (unsigned int is = 0; is < im; is++) {
        const ChartTableEntry &m = ChartData->GetChartTableEntry(
            m_pQuilt->GetExtendedStackIndexArray()[is]);
        if ((m.Scale_ge(
                scale)) /* && (m_reference_family == m.GetChartFamily())*/) {
          new_dbIndex = m_pQuilt->GetExtendedStackIndexArray()[is];
          break;
        }
      }
    }
  }
 
  return new_dbIndex;
}
 
void ChartCanvas::EnablePaint(bool b_enable) {
  m_b_paint_enable = b_enable;
#ifdef ocpnUSE_GL
  if (m_glcc) m_glcc->EnablePaint(b_enable);
#endif
}
 
bool ChartCanvas::IsQuiltDelta() { return m_pQuilt->IsQuiltDelta(VPoint); }
 
void ChartCanvas::UnlockQuilt() { m_pQuilt->UnlockQuilt(); }
 
std::vector<int> ChartCanvas::GetQuiltIndexArray() {
  return m_pQuilt->GetQuiltIndexArray();
  ;
}
 
void ChartCanvas::SetQuiltMode(bool b_quilt) {
  VPoint.b_quilt = b_quilt;
  VPoint.b_FullScreenQuilt = g_bFullScreenQuilt;
}
 
bool ChartCanvas::GetQuiltMode() { return VPoint.b_quilt; }
 
int ChartCanvas::GetQuiltReferenceChartIndex() {
  return m_pQuilt->GetRefChartdbIndex();
}
 
void ChartCanvas::InvalidateAllQuiltPatchs() {
  m_pQuilt->InvalidateAllQuiltPatchs();
}
 
ChartBase *ChartCanvas::GetLargestScaleQuiltChart() {
  return m_pQuilt->GetLargestScaleChart();
}
 
ChartBase *ChartCanvas::GetFirstQuiltChart() {
  return m_pQuilt->GetFirstChart();
}
 
ChartBase *ChartCanvas::GetNextQuiltChart() { return m_pQuilt->GetNextChart(); }
 
int ChartCanvas::GetQuiltChartCount() { return m_pQuilt->GetnCharts(); }
 
void ChartCanvas::SetQuiltChartHiLiteIndex(int dbIndex) {
  m_pQuilt->SetHiliteIndex(dbIndex);
}
 
void ChartCanvas::SetQuiltChartHiLiteIndexArray(std::vector<int> hilite_array) {
  m_pQuilt->SetHiliteIndexArray(hilite_array);
}
 
void ChartCanvas::ClearQuiltChartHiLiteIndexArray() {
  m_pQuilt->ClearHiliteIndexArray();
}
 
std::vector<int> ChartCanvas::GetQuiltCandidatedbIndexArray(bool flag1,
                                                            bool flag2) {
  return m_pQuilt->GetCandidatedbIndexArray(flag1, flag2);
}
 
int ChartCanvas::GetQuiltRefChartdbIndex() {
  return m_pQuilt->GetRefChartdbIndex();
}
 
std::vector<int> &ChartCanvas::GetQuiltExtendedStackdbIndexArray() {
  return m_pQuilt->GetExtendedStackIndexArray();
}
 
std::vector<int> &ChartCanvas::GetQuiltFullScreendbIndexArray() {
  return m_pQuilt->GetFullscreenIndexArray();
}
 
std::vector<int> ChartCanvas::GetQuiltEclipsedStackdbIndexArray() {
  return m_pQuilt->GetEclipsedStackIndexArray();
}
 
void ChartCanvas::InvalidateQuilt() { return m_pQuilt->Invalidate(); }
 
double ChartCanvas::GetQuiltMaxErrorFactor() {
  return m_pQuilt->GetMaxErrorFactor();
}
 
bool ChartCanvas::IsChartQuiltableRef(int db_index) {
  return m_pQuilt->IsChartQuiltableRef(db_index);
}
 
bool ChartCanvas::IsChartLargeEnoughToRender(ChartBase *chart, ViewPort &vp) {
  double chartMaxScale =
      chart->GetNormalScaleMax(GetCanvasScaleFactor(), GetCanvasWidth());
  return (chartMaxScale * g_ChartNotRenderScaleFactor > vp.chart_scale);
}
 
void ChartCanvas::StartMeasureRoute() {
  if (!m_routeState) {  // no measure tool if currently creating route
    if (m_bMeasure_Active) {
      g_pRouteMan->DeleteRoute(m_pMeasureRoute);
      m_pMeasureRoute = NULL;
    }
 
    m_bMeasure_Active = true;
    m_nMeasureState = 1;
    m_bDrawingRoute = false;
 
    SetCursor(*pCursorPencil);
    Refresh();
  }
}
 
void ChartCanvas::CancelMeasureRoute() {
  m_bMeasure_Active = false;
  m_nMeasureState = 0;
  m_bDrawingRoute = false;
 
  g_pRouteMan->DeleteRoute(m_pMeasureRoute);
  m_pMeasureRoute = NULL;
 
  SetCursor(*pCursorArrow);
}
 
ViewPort &ChartCanvas::GetVP() { return VPoint; }
 
void ChartCanvas::SetVP(ViewPort &vp) {
  VPoint = vp;
  VPoint.SetPixelScale(m_displayScale);
}
 
// void ChartCanvas::SetFocus()
// {
//     printf("set %d\n", m_canvasIndex);
//     //wxWindow:SetFocus();
// }
 
void ChartCanvas::TriggerDeferredFocus() {
  // #if defined(__WXGTK__) || defined(__WXOSX__)
 
  m_deferredFocusTimer.Start(20, true);
 
#if defined(__WXGTK__) || defined(__WXOSX__)
  gFrame->Raise();
#endif
 
  //    gFrame->Raise();
  // #else
  //    SetFocus();
  //    Refresh(true);
  // #endif
}
 
void ChartCanvas::OnDeferredFocusTimerEvent(wxTimerEvent &event) {
  SetFocus();
  Refresh(true);
}
 
void ChartCanvas::OnKeyChar(wxKeyEvent &event) {
  if (SendKeyEventToPlugins(event))
    return;  // PlugIn did something, and does not want the canvas to do
             // anything else
 
  int key_char = event.GetKeyCode();
  switch (key_char) {
    case '?':
      HotkeysDlg(wxWindow::FindWindowByName("MainWindow")).ShowModal();
      break;
    case '+':
      ZoomCanvas(g_plus_minus_zoom_factor, false);
      break;
    case '-':
      ZoomCanvas(1.0 / g_plus_minus_zoom_factor, false);
      break;
    default:
      break;
  }
  if (g_benable_rotate) {
    switch (key_char) {
      case ']':
        RotateCanvas(1);
        Refresh();
        break;
 
      case '[':
        RotateCanvas(-1);
        Refresh();
        break;
 
      case '\\':
        DoRotateCanvas(0);
        break;
    }
  }
 
  event.Skip();
}
 
void ChartCanvas::OnKeyDown(wxKeyEvent &event) {
  if (SendKeyEventToPlugins(event))
    return;  // PlugIn did something, and does not want the canvas to do
             // anything else
 
  bool b_handled = false;
 
  m_modkeys = event.GetModifiers();
 
  int panspeed = m_modkeys == wxMOD_ALT ? 1 : 100;
 
#ifdef OCPN_ALT_MENUBAR
#ifndef __WXOSX__
  // If the permanent menubar is disabled, we show it temporarily when Alt is
  // pressed or when Alt + a letter is presssed (for the top-menu-level
  // hotkeys). The toggling normally takes place in OnKeyUp, but here we handle
  // some special cases.
  if (IsTempMenuBarEnabled() && event.AltDown() && !g_bShowMenuBar) {
    // If Alt + a letter is pressed, and the menubar is hidden, show it now
    if (event.GetKeyCode() >= 'A' && event.GetKeyCode() <= 'Z') {
      if (!g_bTempShowMenuBar) {
        g_bTempShowMenuBar = true;
        parent_frame->ApplyGlobalSettings(false);
      }
      m_bMayToggleMenuBar = false;  // don't hide it again when we release Alt
      event.Skip();
      return;
    }
    // If another key is pressed while Alt is down, do NOT toggle the menus when
    // Alt is released
    if (event.GetKeyCode() != WXK_ALT) {
      m_bMayToggleMenuBar = false;
    }
  }
#endif
#endif
 
  // HOTKEYS
  switch (event.GetKeyCode()) {
    case WXK_TAB:
      // parent_frame->SwitchKBFocus( this );
      break;
 
    case WXK_MENU:
      int x, y;
      event.GetPosition(&x, &y);
      m_FinishRouteOnKillFocus = false;
      CallPopupMenu(x, y);
      m_FinishRouteOnKillFocus = true;
      break;
 
    case WXK_ALT:
      m_modkeys |= wxMOD_ALT;
      break;
 
    case WXK_CONTROL:
      m_modkeys |= wxMOD_CONTROL;
      break;
 
#ifdef __WXOSX__
    // On macOS Cmd generates WXK_CONTROL and Ctrl generates WXK_RAW_CONTROL
    case WXK_RAW_CONTROL:
      m_modkeys |= wxMOD_RAW_CONTROL;
      break;
#endif
 
    case WXK_LEFT:
      if (m_modkeys == wxMOD_CONTROL)
        parent_frame->DoStackDown(this);
      else if (g_bsmoothpanzoom) {
        StartTimedMovement();
        m_panx = -1;
      } else {
        PanCanvas(-panspeed, 0);
      }
      b_handled = true;
      break;
 
    case WXK_UP:
      if (g_bsmoothpanzoom) {
        StartTimedMovement();
        m_pany = -1;
      } else
        PanCanvas(0, -panspeed);
      b_handled = true;
      break;
 
    case WXK_RIGHT:
      if (m_modkeys == wxMOD_CONTROL)
        parent_frame->DoStackUp(this);
      else if (g_bsmoothpanzoom) {
        StartTimedMovement();
        m_panx = 1;
      } else
        PanCanvas(panspeed, 0);
      b_handled = true;
 
      break;
 
    case WXK_DOWN:
      if (g_bsmoothpanzoom) {
        StartTimedMovement();
        m_pany = 1;
      } else
        PanCanvas(0, panspeed);
      b_handled = true;
      break;
 
    case WXK_F2: {
      // TogglebFollow();
      if (event.ShiftDown()) {
        double scale = GetVP().view_scale_ppm;
        auto current_family = m_pQuilt->GetRefFamily();
        auto target_family = CHART_FAMILY_UNKNOWN;
        if (current_family == CHART_FAMILY_RASTER)
          target_family = CHART_FAMILY_VECTOR;
        else
          target_family = CHART_FAMILY_RASTER;
 
        std::shared_ptr<HostApi> host_api;
        host_api = GetHostApi();
        auto api_121 = std::dynamic_pointer_cast<HostApi121>(host_api);
 
        if (api_121)
          api_121->SelectChartFamily(m_canvasIndex,
                                     (ChartFamilyEnumPI)target_family);
 
      } else
        TogglebFollow();
      break;
    }
    case WXK_F3: {
      SetShowENCText(!GetShowENCText());
      Refresh(true);
      InvalidateGL();
      break;
    }
    case WXK_F4:
      if (!m_bMeasure_Active) {
        if (event.ShiftDown())
          m_bMeasure_DistCircle = true;
        else
          m_bMeasure_DistCircle = false;
 
        StartMeasureRoute();
      } else {
        CancelMeasureRoute();
 
        SetCursor(*pCursorArrow);
 
        // SurfaceToolbar();
        InvalidateGL();
        Refresh(false);
      }
 
      break;
 
    case WXK_F5:
      parent_frame->ToggleColorScheme();
      gFrame->Raise();
      TriggerDeferredFocus();
      break;
 
    case WXK_F6: {
      int mod = m_modkeys & wxMOD_SHIFT;
      if (mod != m_brightmod) {
        m_brightmod = mod;
        m_bbrightdir = !m_bbrightdir;
      }
 
      if (!m_bbrightdir) {
        g_nbrightness -= 10;
        if (g_nbrightness <= MIN_BRIGHT) {
          g_nbrightness = MIN_BRIGHT;
          m_bbrightdir = true;
        }
      } else {
        g_nbrightness += 10;
        if (g_nbrightness >= MAX_BRIGHT) {
          g_nbrightness = MAX_BRIGHT;
          m_bbrightdir = false;
        }
      }
 
      SetScreenBrightness(g_nbrightness);
      ShowBrightnessLevelTimedPopup(g_nbrightness / 10, 1, 10);
 
      SetFocus();       // just in case the external program steals it....
      gFrame->Raise();  // And reactivate the application main
 
      break;
    }
 
    case WXK_F7:
      parent_frame->DoStackDown(this);
      break;
 
    case WXK_F8:
      parent_frame->DoStackUp(this);
      break;
 
#ifndef __WXOSX__
    case WXK_F9: {
      ToggleCanvasQuiltMode();
      break;
    }
#endif
 
    case WXK_F11:
      parent_frame->ToggleFullScreen();
      b_handled = true;
      break;
 
    case WXK_F12: {
      if (m_modkeys == wxMOD_ALT) {
        // m_nMeasureState = *(volatile int *)(0);  // generate a fault for
      } else {
        ToggleChartOutlines();
      }
      break;
    }
 
    case WXK_PAUSE:  // Drop MOB
      parent_frame->ActivateMOB();
      break;
 
    // NUMERIC PAD
    case WXK_NUMPAD_ADD:  // '+' on NUM PAD
    case WXK_PAGEUP: {
      ZoomCanvas(g_plus_minus_zoom_factor, false);
      break;
    }
    case WXK_NUMPAD_SUBTRACT:  // '-' on NUM PAD
    case WXK_PAGEDOWN: {
      ZoomCanvas(1.0 / g_plus_minus_zoom_factor, false);
      break;
    }
    case WXK_DELETE:
    case WXK_BACK:
      if (m_bMeasure_Active) {
        if (m_nMeasureState > 2) {
          m_pMeasureRoute->DeletePoint(m_pMeasureRoute->GetLastPoint());
          m_pMeasureRoute->m_lastMousePointIndex =
              m_pMeasureRoute->GetnPoints();
          m_nMeasureState--;
          gFrame->RefreshAllCanvas();
        } else {
          CancelMeasureRoute();
          StartMeasureRoute();
        }
      }
      break;
    default:
      break;
  }
 
  if (event.GetKeyCode() < 128)  // ascii
  {
    int key_char = event.GetKeyCode();
 
    //      Handle both QWERTY and AZERTY keyboard separately for a few control
    //      codes
    if (!g_b_assume_azerty) {
#ifdef __WXMAC__
      if (g_benable_rotate) {
        switch (key_char) {
            // On other platforms these are handled in OnKeyChar, which
            // (apparently) works better in some locales. On OS X it is better
            // to handle them here, since pressing Alt (which should change the
            // rotation speed) changes the key char and so prevents the keys
            // from working.
          case ']':
            RotateCanvas(1);
            b_handled = true;
            break;
 
          case '[':
            RotateCanvas(-1);
            b_handled = true;
            break;
 
          case '\\':
            DoRotateCanvas(0);
            b_handled = true;
            break;
        }
      }
#endif
    } else {  // AZERTY
      switch (key_char) {
        case 43:
          ZoomCanvas(g_plus_minus_zoom_factor, false);
          break;
 
        case 54:  // '-'  alpha/num pad
          //            case 56:                     // '_'  alpha/num pad
          ZoomCanvas(1.0 / g_plus_minus_zoom_factor, false);
          break;
      }
    }
 
#ifdef __WXOSX__
    // Ctrl+Cmd+F toggles fullscreen on macOS
    if (key_char == 'F' && m_modkeys & wxMOD_CONTROL &&
        m_modkeys & wxMOD_RAW_CONTROL) {
      parent_frame->ToggleFullScreen();
      return;
    }
#endif
 
    if (event.ControlDown()) key_char -= 64;
 
    if (key_char >= '0' && key_char <= '9')
      SetGroupIndex(key_char - '0');
    else
 
      switch (key_char) {
        case 'A':
          SetShowENCAnchor(!GetShowENCAnchor());
          ReloadVP();
 
          break;
 
        case 'C':
          parent_frame->ToggleColorScheme();
          break;
 
        case 'D': {
          int x, y;
          event.GetPosition(&x, &y);
          ChartTypeEnum ChartType = CHART_TYPE_UNKNOWN;
          ChartFamilyEnum ChartFam = CHART_FAMILY_UNKNOWN;
          // First find out what kind of chart is being used
          if (!pPopupDetailSlider) {
            if (VPoint.b_quilt) {
              if (m_pQuilt) {
                if (m_pQuilt->GetChartAtPix(
                        VPoint,
                        wxPoint(
                            x, y)))  // = null if no chart loaded for this point
                {
                  ChartType = m_pQuilt->GetChartAtPix(VPoint, wxPoint(x, y))
                                  ->GetChartType();
                  ChartFam = m_pQuilt->GetChartAtPix(VPoint, wxPoint(x, y))
                                 ->GetChartFamily();
                }
              }
            } else {
              if (m_singleChart) {
                ChartType = m_singleChart->GetChartType();
                ChartFam = m_singleChart->GetChartFamily();
              }
            }
            // If a charttype is found show the popupslider
            if ((ChartType != CHART_TYPE_UNKNOWN) ||
                (ChartFam != CHART_FAMILY_UNKNOWN)) {
              pPopupDetailSlider = new PopUpDSlide(
                  this, -1, ChartType, ChartFam,
                  wxPoint(g_detailslider_dialog_x, g_detailslider_dialog_y),
                  wxDefaultSize, wxSIMPLE_BORDER, "");
              if (pPopupDetailSlider) pPopupDetailSlider->Show();
            }
          } else  //( !pPopupDetailSlider ) close popupslider
          {
            if (pPopupDetailSlider) pPopupDetailSlider->Close();
            pPopupDetailSlider = NULL;
          }
          break;
        }
 
        case 'E':
          m_nmea_log->Show();
          m_nmea_log->Raise();
          break;
 
        case 'L':
          SetShowENCLights(!GetShowENCLights());
          ReloadVP();
 
          break;
 
        case 'M':
          if (event.ShiftDown())
            m_bMeasure_DistCircle = true;
          else
            m_bMeasure_DistCircle = false;
 
          StartMeasureRoute();
          break;
 
        case 'N':
          if (g_bInlandEcdis && ps52plib) {
            SetENCDisplayCategory((_DisCat)STANDARD);
          }
          break;
 
        case 'O':
          ToggleChartOutlines();
          break;
 
        case 'Q':
          ToggleCanvasQuiltMode();
          break;
 
        case 'P':
          parent_frame->ToggleTestPause();
          break;
        case 'R':
          g_bNavAidRadarRingsShown = !g_bNavAidRadarRingsShown;
          if (g_bNavAidRadarRingsShown && g_iNavAidRadarRingsNumberVisible == 0)
            g_iNavAidRadarRingsNumberVisible = 1;
          else if (!g_bNavAidRadarRingsShown &&
                   g_iNavAidRadarRingsNumberVisible == 1)
            g_iNavAidRadarRingsNumberVisible = 0;
          break;
        case 'S':
          SetShowENCDepth(!m_encShowDepth);
          ReloadVP();
          break;
 
        case 'T':
          SetShowENCText(!GetShowENCText());
          ReloadVP();
          break;
 
        case 'U':
          SetShowENCDataQual(!GetShowENCDataQual());
          ReloadVP();
          break;
 
        case 'V':
          m_bShowNavobjects = !m_bShowNavobjects;
          Refresh(true);
          break;
 
        case 'W':  // W Toggle CPA alarm
          ToggleCPAWarn();
 
          break;
 
        case 1:  // Ctrl A
          TogglebFollow();
 
          break;
 
        case 2:  // Ctrl B
          if (g_bShowMenuBar == false) parent_frame->ToggleChartBar(this);
          break;
 
        case 13:  // Ctrl M // Drop Marker at cursor
        {
          if (event.ControlDown()) gFrame->DropMarker(false);
          break;
        }
 
        case 14:  // Ctrl N - Activate next waypoint in a route
        {
          if (Route *r = g_pRouteMan->GetpActiveRoute()) {
            int indexActive = r->GetIndexOf(r->m_pRouteActivePoint);
            if ((indexActive + 1) <= r->GetnPoints()) {
              g_pRouteMan->ActivateNextPoint(r, true);
              InvalidateGL();
              Refresh(false);
            }
          }
          break;
        }
 
        case 15:  // Ctrl O - Drop Marker at boat's position
        {
          if (!g_bShowMenuBar) gFrame->DropMarker(true);
          break;
        }
 
        case 32:  // Special needs use space bar
        {
          if (g_bSpaceDropMark) gFrame->DropMarker(true);
          break;
        }
 
        case -32:  // Ctrl Space            //    Drop MOB
        {
          if (m_modkeys == wxMOD_CONTROL) parent_frame->ActivateMOB();
 
          break;
        }
 
        case -20:  // Ctrl ,
        {
          parent_frame->DoSettings();
          break;
        }
        case 17:  // Ctrl Q
          parent_frame->Close();
          return;
 
        case 18:  // Ctrl R
          StartRoute();
          return;
 
        case 20:                            // Ctrl T
          if (NULL == pGoToPositionDialog)  // There is one global instance of
                                            // the Go To Position Dialog
            pGoToPositionDialog = new GoToPositionDialog(this);
          pGoToPositionDialog->SetCanvas(this);
          pGoToPositionDialog->Show();
          break;
 
        case 25:  // Ctrl Y
          if (undo->AnythingToRedo()) {
            undo->RedoNextAction();
            InvalidateGL();
            Refresh(false);
          }
          break;
 
        case 26:
          if (event.ShiftDown()) {  // Shift-Ctrl-Z
            if (undo->AnythingToRedo()) {
              undo->RedoNextAction();
              InvalidateGL();
              Refresh(false);
            }
          } else {  // Ctrl Z
            if (undo->AnythingToUndo()) {
              undo->UndoLastAction();
              InvalidateGL();
              Refresh(false);
            }
          }
          break;
 
        case 27:
          // Generic break
          if (m_bMeasure_Active) {
            CancelMeasureRoute();
 
            SetCursor(*pCursorArrow);
 
            // SurfaceToolbar();
            gFrame->RefreshAllCanvas();
          }
 
          if (m_routeState)  // creating route?
          {
            FinishRoute();
            // SurfaceToolbar();
            InvalidateGL();
            Refresh(false);
          }
 
          break;
 
        case 7:  // Ctrl G
          switch (gamma_state) {
            case (0):
              r_gamma_mult = 0;
              g_gamma_mult = 1;
              b_gamma_mult = 0;
              gamma_state = 1;
              break;
            case (1):
              r_gamma_mult = 1;
              g_gamma_mult = 0;
              b_gamma_mult = 0;
              gamma_state = 2;
              break;
            case (2):
              r_gamma_mult = 1;
              g_gamma_mult = 1;
              b_gamma_mult = 1;
              gamma_state = 0;
              break;
          }
          SetScreenBrightness(g_nbrightness);
 
          break;
 
        case 9:  // Ctrl I
          if (event.ControlDown()) {
            m_bShowCompassWin = !m_bShowCompassWin;
            SetShowGPSCompassWindow(m_bShowCompassWin);
            Refresh(false);
          }
          break;
 
        default:
          break;
 
      }  // switch
  }
 
  // Allow OnKeyChar to catch the key events too.
  if (!b_handled) {
    event.Skip();
  }
}
 
void ChartCanvas::OnKeyUp(wxKeyEvent &event) {
  if (SendKeyEventToPlugins(event))
    return;  // PlugIn did something, and does not want the canvas to do
             // anything else
 
  switch (event.GetKeyCode()) {
    case WXK_TAB:
      parent_frame->SwitchKBFocus(this);
      break;
 
    case WXK_LEFT:
    case WXK_RIGHT:
      m_panx = 0;
      if (!m_pany) m_panspeed = 0;
      break;
 
    case WXK_UP:
    case WXK_DOWN:
      m_pany = 0;
      if (!m_panx) m_panspeed = 0;
      break;
 
    case WXK_NUMPAD_ADD:       // '+' on NUM PAD
    case WXK_NUMPAD_SUBTRACT:  // '-' on NUM PAD
    case WXK_PAGEUP:
    case WXK_PAGEDOWN:
      if (m_mustmove) DoMovement(m_mustmove);
 
      m_zoom_factor = 1;
      break;
 
    case WXK_ALT:
      m_modkeys &= ~wxMOD_ALT;
#ifdef OCPN_ALT_MENUBAR
#ifndef __WXOSX__
      // If the permanent menu bar is disabled, and we are not in the middle of
      // another key combo, then show the menu bar temporarily when Alt is
      // released (or hide it if already visible).
      if (IsTempMenuBarEnabled() && !g_bShowMenuBar && m_bMayToggleMenuBar) {
        g_bTempShowMenuBar = !g_bTempShowMenuBar;
        parent_frame->ApplyGlobalSettings(false);
      }
      m_bMayToggleMenuBar = true;
#endif
#endif
      break;
 
    case WXK_CONTROL:
      m_modkeys &= ~wxMOD_CONTROL;
      break;
  }
 
  if (event.GetKeyCode() < 128)  // ascii
  {
    int key_char = event.GetKeyCode();
 
    //      Handle both QWERTY and AZERTY keyboard separately for a few control
    //      codes
    if (!g_b_assume_azerty) {
      switch (key_char) {
        case '+':
        case '=':
        case '-':
        case '_':
        case 54:
        case 56:  // '_'  alpha/num pad
          DoMovement(m_mustmove);
 
          // m_zoom_factor = 1;
          break;
        case '[':
        case ']':
          DoMovement(m_mustmove);
          m_rotation_speed = 0;
          break;
      }
    } else {
      switch (key_char) {
        case 43:
        case 54:  // '-'  alpha/num pad
        case 56:  // '_'  alpha/num pad
          DoMovement(m_mustmove);
 
          m_zoom_factor = 1;
          break;
      }
    }
  }
  event.Skip();
}
 
void ChartCanvas::ToggleChartOutlines() {
  m_bShowOutlines = !m_bShowOutlines;
 
  Refresh(false);
 
#ifdef ocpnUSE_GL  // opengl renders chart outlines as part of the chart this
                   // needs a full refresh
  if (g_bopengl) InvalidateGL();
#endif
}
 
void ChartCanvas::ToggleLookahead() {
  m_bLookAhead = !m_bLookAhead;
  m_OSoffsetx = 0;  // center ownship
  m_OSoffsety = 0;
}
 
void ChartCanvas::SetUpMode(int mode) {
  m_upMode = mode;
 
  if (mode != NORTH_UP_MODE) {
    //    Stuff the COGAvg table in case COGUp is selected
    double stuff = 0;
    if (!std::isnan(gCog)) stuff = gCog;
 
    if (g_COGAvgSec > 0) {
      for (int i = 0; i < g_COGAvgSec; i++) gFrame->COGTable[i] = stuff;
    }
    g_COGAvg = stuff;
    gFrame->FrameCOGTimer.Start(100, wxTIMER_CONTINUOUS);
  } else {
    if (!g_bskew_comp && (fabs(GetVPSkew()) > 0.0001))
      SetVPRotation(GetVPSkew());
    else
      SetVPRotation(0); /* reset to north up */
  }
 
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
 
  UpdateGPSCompassStatusBox(true);
  gFrame->DoChartUpdate();
}
 
bool ChartCanvas::DoCanvasCOGSet() {
  if (GetUpMode() == NORTH_UP_MODE) return false;
  double cog_use = g_COGAvg;
  if (g_btenhertz) cog_use = gCog;
 
  double rotation = 0;
  if ((GetUpMode() == HEAD_UP_MODE) && !std::isnan(gHdt)) {
    rotation = -gHdt * PI / 180.;
  } else if ((GetUpMode() == COURSE_UP_MODE) && !std::isnan(cog_use))
    rotation = -cog_use * PI / 180.;
 
  SetVPRotation(rotation);
  return true;
}
 
double easeOutCubic(double t) {
  // Starts quickly and slows down toward the end
  return 1.0 - pow(1.0 - t, 3.0);
}
 
void ChartCanvas::StartChartDragInertia() {
  m_bChartDragging = false;
 
  // Set some parameters
  m_chart_drag_inertia_time = 750;  // msec
  m_chart_drag_inertia_start_time = wxGetLocalTimeMillis();
  m_last_elapsed = 0;
 
  // Calculate ending drag velocity
  size_t n_vel = 10;
  n_vel = wxMin(n_vel, m_drag_vec_t.size());
  int xacc = 0;
  int yacc = 0;
  double tacc = 0;
  size_t length = m_drag_vec_t.size();
  for (size_t i = 0; i < n_vel; i++) {
    xacc += m_drag_vec_x.at(length - 1 - i);
    yacc += m_drag_vec_y.at(length - 1 - i);
    tacc += m_drag_vec_t.at(length - 1 - i);
  }
 
  if (tacc == 0) return;
 
  double drag_velocity_x = xacc / tacc;
  double drag_velocity_y = yacc / tacc;
  // printf("drag total  %d  %d  %g %g %g\n", xacc, yacc, tacc, drag_velocity_x,
  // drag_velocity_y);
 
  // Abort inertia drag if velocity is very slow, preventing jitters on sloppy
  // touch tap.
  if ((fabs(drag_velocity_x) < 200) && (fabs(drag_velocity_y) < 200)) return;
 
  m_chart_drag_velocity_x = drag_velocity_x;
  m_chart_drag_velocity_y = drag_velocity_y;
 
  m_chart_drag_inertia_active = true;
  // First callback as fast as possible.
  m_chart_drag_inertia_timer.Start(1, wxTIMER_ONE_SHOT);
}
 
void ChartCanvas::OnChartDragInertiaTimer(wxTimerEvent &event) {
  if (!m_chart_drag_inertia_active) return;
  // Calculate time fraction from 0..1
  wxLongLong now = wxGetLocalTimeMillis();
  double elapsed = (now - m_chart_drag_inertia_start_time).ToDouble();
  double t = elapsed / m_chart_drag_inertia_time.ToDouble();
  if (t > 1.0) t = 1.0;
  double e = 1.0 - easeOutCubic(t);  // 0..1
 
  double dx =
      m_chart_drag_velocity_x * ((elapsed - m_last_elapsed) / 1000.) * e;
  double dy =
      m_chart_drag_velocity_y * ((elapsed - m_last_elapsed) / 1000.) * e;
 
  m_last_elapsed = elapsed;
 
  // Ensure that target destination lies on whole-pixel boundary
  // This allows the render engine to use a faster FBO copy method for drawing
  double destination_x = (GetCanvasWidth() / 2) + wxRound(dx);
  double destination_y = (GetCanvasHeight() / 2) + wxRound(dy);
  double inertia_lat, inertia_lon;
  GetCanvasPixPoint(destination_x, destination_y, inertia_lat, inertia_lon);
  SetViewPoint(inertia_lat, inertia_lon);  // about 1 msec
  // Check if ownship has moved off-screen
  if (!IsOwnshipOnScreen()) {
    m_bFollow = false;  // update the follow flag
    parent_frame->SetMenubarItemState(ID_MENU_NAV_FOLLOW, false);
    UpdateFollowButtonState();
    m_OSoffsetx = 0;
    m_OSoffsety = 0;
  } else {
    m_OSoffsetx += dx;
    m_OSoffsety -= dy;
  }
 
  Refresh(false);
 
  // Stop condition
  if ((t >= 1) || (fabs(dx) < 1) || (fabs(dy) < 1)) {
    m_chart_drag_inertia_timer.Stop();
 
    // Disable chart pan movement logic
    m_target_lat = GetVP().clat;
    m_target_lon = GetVP().clon;
    m_pan_drag.x = m_pan_drag.y = 0;
    m_panx = m_pany = 0;
    m_chart_drag_inertia_active = false;
    DoCanvasUpdate();
 
  } else {
    int target_redraw_interval = 40;  // msec
    m_chart_drag_inertia_timer.Start(target_redraw_interval, wxTIMER_ONE_SHOT);
  }
}
 
void ChartCanvas::StopMovement() {
  m_panx = m_pany = 0;
  m_panspeed = 0;
  m_zoom_factor = 1;
  m_rotation_speed = 0;
  m_mustmove = 0;
#if 0
#if !defined(__WXGTK__) && !defined(__WXQT__)
    SetFocus();
    gFrame->Raise();
#endif
#endif
}
 
/* instead of integrating in timer callbacks
   (which do not always get called fast enough)
   we can perform the integration of movement
   at each render frame based on the time change */
bool ChartCanvas::StartTimedMovement(bool stoptimer) {
  // Start/restart the stop movement timer
  if (stoptimer) pMovementStopTimer->Start(800, wxTIMER_ONE_SHOT);
 
  if (!pMovementTimer->IsRunning()) {
    pMovementTimer->Start(1, wxTIMER_ONE_SHOT);
  }
 
  if (m_panx || m_pany || m_zoom_factor != 1 || m_rotation_speed) {
    // already moving, gets called again because of key-repeat event
    return false;
  }
 
  m_last_movement_time = wxDateTime::UNow();
 
  return true;
}
void ChartCanvas::StartTimedMovementVP(double target_lat, double target_lon,
                                       int nstep) {
  // Save the target
  m_target_lat = target_lat;
  m_target_lon = target_lon;
 
  // Save the start point
  m_start_lat = GetVP().clat;
  m_start_lon = GetVP().clon;
 
  m_VPMovementTimer.Start(1, true);  // oneshot
  m_timed_move_vp_active = true;
  m_stvpc = 0;
  m_timedVP_step = nstep;
}
 
void ChartCanvas::DoTimedMovementVP() {
  if (!m_timed_move_vp_active) return;   // not active
  if (m_stvpc++ > m_timedVP_step * 2) {  // Backstop
    StopMovement();
    return;
  }
  // Stop condition
  double one_pix = (1. / (1852 * 60)) / GetVP().view_scale_ppm;
  double d2 =
      pow(m_run_lat - m_target_lat, 2) + pow(m_run_lon - m_target_lon, 2);
  d2 = pow(d2, 0.5);
 
  if (d2 < one_pix) {
    SetViewPoint(m_target_lat, m_target_lon);  // Embeds a refresh
    StopMovementVP();
    return;
  }
 
  // if ((fabs(m_run_lat - m_target_lat) < one_pix) &&
  //     (fabs(m_run_lon - m_target_lon) < one_pix)) {
  //   StopMovementVP();
  //   return;
  // }
 
  double new_lat = GetVP().clat + (m_target_lat - m_start_lat) / m_timedVP_step;
  double new_lon = GetVP().clon + (m_target_lon - m_start_lon) / m_timedVP_step;
 
  m_run_lat = new_lat;
  m_run_lon = new_lon;
 
  SetViewPoint(new_lat, new_lon);  // Embeds a refresh
}
 
void ChartCanvas::StopMovementVP() { m_timed_move_vp_active = false; }
 
void ChartCanvas::MovementVPTimerEvent(wxTimerEvent &) { DoTimedMovementVP(); }
 
void ChartCanvas::StartTimedMovementTarget() {}
 
void ChartCanvas::DoTimedMovementTarget() {}
 
void ChartCanvas::StopMovementTarget() {}
int ntm;
 
void ChartCanvas::DoTimedMovement() {
  if (m_pan_drag == wxPoint(0, 0) && !m_panx && !m_pany && m_zoom_factor == 1 &&
      !m_rotation_speed)
    return; /* not moving */
 
  wxDateTime now = wxDateTime::UNow();
  long dt = 0;
  if (m_last_movement_time.IsValid())
    dt = (now - m_last_movement_time).GetMilliseconds().ToLong();
 
  m_last_movement_time = now;
 
  if (dt > 500) /* if we are running very slow, don't integrate too fast */
    dt = 500;
 
  DoMovement(dt);
}
 
void ChartCanvas::DoMovement(long dt) {
  /* if we get here quickly assume 1ms so that some movement occurs */
  if (dt == 0) dt = 1;
 
  m_mustmove -= dt;
  if (m_mustmove < 0) m_mustmove = 0;
 
  if (!m_inPinch) {  // this stops compound zoom/pan
    if (m_pan_drag.x || m_pan_drag.y) {
      PanCanvas(m_pan_drag.x, m_pan_drag.y);
      m_pan_drag.x = m_pan_drag.y = 0;
    }
 
    if (m_panx || m_pany) {
      const double slowpan = .1, maxpan = 2;
      if (m_modkeys == wxMOD_ALT)
        m_panspeed = slowpan;
      else {
        m_panspeed += (double)dt / 500; /* apply acceleration */
        m_panspeed = wxMin(maxpan, m_panspeed);
      }
      PanCanvas(m_panspeed * m_panx * dt, m_panspeed * m_pany * dt);
    }
  }
  if (m_zoom_factor != 1) {
    double alpha = 400, beta = 1.5;
    double zoom_factor = (exp(dt / alpha) - 1) / beta + 1;
 
    if (m_modkeys == wxMOD_ALT) zoom_factor = pow(zoom_factor, .15);
 
    if (m_zoom_factor < 1) zoom_factor = 1 / zoom_factor;
 
    //  Try to hit the zoom target exactly.
    // if(m_wheelzoom_stop_oneshot > 0)
    {
      if (zoom_factor > 1) {
        if (VPoint.chart_scale / zoom_factor <= m_zoom_target)
          zoom_factor = VPoint.chart_scale / m_zoom_target;
      }
 
      else if (zoom_factor < 1) {
        if (VPoint.chart_scale / zoom_factor >= m_zoom_target)
          zoom_factor = VPoint.chart_scale / m_zoom_target;
      }
    }
 
    if (fabs(zoom_factor - 1) > 1e-4) {
      DoZoomCanvas(zoom_factor, m_bzooming_to_cursor);
    } else {
      StopMovement();
    }
 
    if (m_wheelzoom_stop_oneshot > 0) {
      if (m_wheelstopwatch.Time() > m_wheelzoom_stop_oneshot) {
        m_wheelzoom_stop_oneshot = 0;
        StopMovement();
      }
 
      //      Don't overshoot the zoom target.
      if (zoom_factor > 1) {
        if (VPoint.chart_scale <= m_zoom_target) {
          m_wheelzoom_stop_oneshot = 0;
          StopMovement();
        }
      } else if (zoom_factor < 1) {
        if (VPoint.chart_scale >= m_zoom_target) {
          m_wheelzoom_stop_oneshot = 0;
          StopMovement();
        }
      }
    }
  }
 
  if (m_rotation_speed) { /* in degrees per second */
    double speed = m_rotation_speed;
    if (m_modkeys == wxMOD_ALT) speed /= 10;
    DoRotateCanvas(VPoint.rotation + speed * PI / 180 * dt / 1000.0);
  }
}
 
void ChartCanvas::SetColorScheme(ColorScheme cs) {
  SetAlertString("");
 
  //    Setup ownship image pointers
  switch (cs) {
    case GLOBAL_COLOR_SCHEME_DAY:
      m_pos_image_red = &m_os_image_red_day;
      m_pos_image_grey = &m_os_image_grey_day;
      m_pos_image_yellow = &m_os_image_yellow_day;
      m_pos_image_user = m_pos_image_user_day;
      m_pos_image_user_grey = m_pos_image_user_grey_day;
      m_pos_image_user_yellow = m_pos_image_user_yellow_day;
      m_cTideBitmap = m_bmTideDay;
      m_cCurrentBitmap = m_bmCurrentDay;
 
      break;
    case GLOBAL_COLOR_SCHEME_DUSK:
      m_pos_image_red = &m_os_image_red_dusk;
      m_pos_image_grey = &m_os_image_grey_dusk;
      m_pos_image_yellow = &m_os_image_yellow_dusk;
      m_pos_image_user = m_pos_image_user_dusk;
      m_pos_image_user_grey = m_pos_image_user_grey_dusk;
      m_pos_image_user_yellow = m_pos_image_user_yellow_dusk;
      m_cTideBitmap = m_bmTideDusk;
      m_cCurrentBitmap = m_bmCurrentDusk;
      break;
    case GLOBAL_COLOR_SCHEME_NIGHT:
      m_pos_image_red = &m_os_image_red_night;
      m_pos_image_grey = &m_os_image_grey_night;
      m_pos_image_yellow = &m_os_image_yellow_night;
      m_pos_image_user = m_pos_image_user_night;
      m_pos_image_user_grey = m_pos_image_user_grey_night;
      m_pos_image_user_yellow = m_pos_image_user_yellow_night;
      m_cTideBitmap = m_bmTideNight;
      m_cCurrentBitmap = m_bmCurrentNight;
      break;
    default:
      m_pos_image_red = &m_os_image_red_day;
      m_pos_image_grey = &m_os_image_grey_day;
      m_pos_image_yellow = &m_os_image_yellow_day;
      m_pos_image_user = m_pos_image_user_day;
      m_pos_image_user_grey = m_pos_image_user_grey_day;
      m_pos_image_user_yellow = m_pos_image_user_yellow_day;
      m_cTideBitmap = m_bmTideDay;
      m_cCurrentBitmap = m_bmCurrentDay;
      break;
  }
 
  CreateDepthUnitEmbossMaps(cs);
  CreateOZEmbossMapData(cs);
 
  //  Set up fog effect base color
  m_fog_color = wxColor(
      170, 195, 240);  // this is gshhs (backgound world chart) ocean color
  float dim = 1.0;
  switch (cs) {
    case GLOBAL_COLOR_SCHEME_DUSK:
      dim = 0.5;
      break;
    case GLOBAL_COLOR_SCHEME_NIGHT:
      dim = 0.25;
      break;
    default:
      break;
  }
  m_fog_color.Set(m_fog_color.Red() * dim, m_fog_color.Green() * dim,
                  m_fog_color.Blue() * dim);
 
  //  Really dark
#if 0
    if( cs == GLOBAL_COLOR_SCHEME_DUSK || cs == GLOBAL_COLOR_SCHEME_NIGHT ) {
        SetBackgroundColour( wxColour(0,0,0) );
 
        SetWindowStyleFlag( (GetWindowStyleFlag() & ~wxSIMPLE_BORDER) | wxNO_BORDER);
    }
    else{
        SetWindowStyleFlag( (GetWindowStyleFlag() & ~wxNO_BORDER) | wxSIMPLE_BORDER);
#ifndef __WXMAC__
        SetBackgroundColour( wxNullColour );
#endif
    }
#endif
 
  // UpdateToolbarColorScheme(cs);
 
  m_Piano->SetColorScheme(cs);
 
  m_Compass->SetColorScheme(cs);
 
  if (m_muiBar) m_muiBar->SetColorScheme(cs);
 
  if (pWorldBackgroundChart) pWorldBackgroundChart->SetColorScheme(cs);
 
  if (m_NotificationsList) m_NotificationsList->SetColorScheme();
  if (m_notification_button) {
    m_notification_button->SetColorScheme(cs);
  }
 
#ifdef ocpnUSE_GL
  if (g_bopengl && m_glcc) {
    m_glcc->SetColorScheme(cs);
    g_glTextureManager->ClearAllRasterTextures();
    // m_glcc->FlushFBO();
  }
#endif
  SetbTCUpdate(true);  // force re-render of tide/current locators
  m_brepaint_piano = true;
 
  ReloadVP();
 
  m_cs = cs;
}
 
wxBitmap ChartCanvas::CreateDimBitmap(wxBitmap &Bitmap, double factor) {
  wxImage img = Bitmap.ConvertToImage();
  int sx = img.GetWidth();
  int sy = img.GetHeight();
 
  wxImage new_img(img);
 
  for (int i = 0; i < sx; i++) {
    for (int j = 0; j < sy; j++) {
      if (!img.IsTransparent(i, j)) {
        new_img.SetRGB(i, j, (unsigned char)(img.GetRed(i, j) * factor),
                       (unsigned char)(img.GetGreen(i, j) * factor),
                       (unsigned char)(img.GetBlue(i, j) * factor));
      }
    }
  }
 
  wxBitmap ret = wxBitmap(new_img);
 
  return ret;
}
 
void ChartCanvas::ShowBrightnessLevelTimedPopup(int brightness, int min,
                                                int max) {
  wxFont *pfont = FontMgr::Get().FindOrCreateFont(
      40, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_BOLD);
 
  if (!m_pBrightPopup) {
    //    Calculate size
    int x, y;
    GetTextExtent("MAX", &x, &y, NULL, NULL, pfont);
 
    m_pBrightPopup = new TimedPopupWin(this, 3);
 
    m_pBrightPopup->SetSize(x, y);
    m_pBrightPopup->Move(120, 120);
  }
 
  int bmpsx = m_pBrightPopup->GetSize().x;
  int bmpsy = m_pBrightPopup->GetSize().y;
 
  wxBitmap bmp(bmpsx, bmpsx);
  wxMemoryDC mdc(bmp);
 
  mdc.SetTextForeground(GetGlobalColor("GREEN4"));
  mdc.SetBackground(wxBrush(GetGlobalColor("UINFD")));
  mdc.SetPen(wxPen(wxColour(0, 0, 0)));
  mdc.SetBrush(wxBrush(GetGlobalColor("UINFD")));
  mdc.Clear();
 
  mdc.DrawRectangle(0, 0, bmpsx, bmpsy);
 
  mdc.SetFont(*pfont);
  wxString val;
 
  if (brightness == max)
    val = "MAX";
  else if (brightness == min)
    val = "MIN";
  else
    val.Printf("%3d", brightness);
 
  mdc.DrawText(val, 0, 0);
 
  mdc.SelectObject(wxNullBitmap);
 
  m_pBrightPopup->SetBitmap(bmp);
  m_pBrightPopup->Show();
  m_pBrightPopup->Refresh();
}
 
void ChartCanvas::RotateTimerEvent(wxTimerEvent &event) {
  m_b_rot_hidef = true;
  ReloadVP();
}
 
void ChartCanvas::OnRolloverPopupTimerEvent(wxTimerEvent &event) {
  if (!g_bRollover) return;
 
  bool b_need_refresh = false;
 
  wxSize win_size = GetSize() * m_displayScale;
  if (console && console->IsShown()) win_size.x -= console->GetSize().x;
 
  //  Handle the AIS Rollover Window first
  bool showAISRollover = false;
  if (g_pAIS && g_pAIS->GetNumTargets() && m_bShowAIS) {
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    SelectItem *pFind = pSelectAIS->FindSelection(
        ctx, m_cursor_lat, m_cursor_lon, SELTYPE_AISTARGET);
    if (pFind) {
      int FoundAIS_MMSI = (wxIntPtr)pFind->m_pData1;
      auto ptarget = g_pAIS->Get_Target_Data_From_MMSI(FoundAIS_MMSI);
 
      if (ptarget) {
        showAISRollover = true;
 
        if (NULL == m_pAISRolloverWin) {
          m_pAISRolloverWin = new RolloverWin(this);
          m_pAISRolloverWin->IsActive(false);
          b_need_refresh = true;
        } else if (m_pAISRolloverWin->IsActive() && m_AISRollover_MMSI &&
                   m_AISRollover_MMSI != FoundAIS_MMSI) {
          //      Sometimes the mouse moves fast enough to get over a new AIS
          //      target before the one-shot has fired to remove the old target.
          //      Result:  wrong target data is shown.
          //      Detect this case,close the existing rollover ASAP, and restart
          //      the timer.
          m_RolloverPopupTimer.Start(50, wxTIMER_ONE_SHOT);
          m_pAISRolloverWin->IsActive(false);
          m_AISRollover_MMSI = 0;
          Refresh();
          return;
        }
 
        m_AISRollover_MMSI = FoundAIS_MMSI;
 
        if (!m_pAISRolloverWin->IsActive()) {
          wxString s = ptarget->GetRolloverString();
          m_pAISRolloverWin->SetString(s);
 
          m_pAISRolloverWin->SetBestPosition(mouse_x, mouse_y, 16, 16,
                                             AIS_ROLLOVER, win_size);
          m_pAISRolloverWin->SetBitmap(AIS_ROLLOVER);
          m_pAISRolloverWin->IsActive(true);
          b_need_refresh = true;
        }
      }
    } else {
      m_AISRollover_MMSI = 0;
      showAISRollover = false;
    }
  }
 
  //  Maybe turn the rollover off
  if (m_pAISRolloverWin && m_pAISRolloverWin->IsActive() && !showAISRollover) {
    m_pAISRolloverWin->IsActive(false);
    m_AISRollover_MMSI = 0;
    b_need_refresh = true;
  }
 
  // Now the Route info rollover
  // Show the route segment info
  bool showRouteRollover = false;
 
  if (NULL == m_pRolloverRouteSeg) {
    //    Get a list of all selectable sgements, and search for the first
    //    visible segment as the rollover target.
 
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    SelectableItemList SelList = pSelect->FindSelectionList(
        ctx, m_cursor_lat, m_cursor_lon, SELTYPE_ROUTESEGMENT);
    auto node = SelList.begin();
    while (node != SelList.end()) {
      SelectItem *pFindSel = *node;
 
      Route *pr = (Route *)pFindSel->m_pData3;  // candidate
 
      if (pr && pr->IsVisible()) {
        m_pRolloverRouteSeg = pFindSel;
        showRouteRollover = true;
 
        if (NULL == m_pRouteRolloverWin) {
          m_pRouteRolloverWin = new RolloverWin(this, 10);
          m_pRouteRolloverWin->IsActive(false);
        }
 
        if (!m_pRouteRolloverWin->IsActive()) {
          wxString s;
          RoutePoint *segShow_point_a =
              (RoutePoint *)m_pRolloverRouteSeg->m_pData1;
          RoutePoint *segShow_point_b =
              (RoutePoint *)m_pRolloverRouteSeg->m_pData2;
 
          double brg, dist;
          DistanceBearingMercator(
              segShow_point_b->m_lat, segShow_point_b->m_lon,
              segShow_point_a->m_lat, segShow_point_a->m_lon, &brg, &dist);
 
          if (!pr->m_bIsInLayer)
            s.Append(_("Route") + ": ");
          else
            s.Append(_("Layer Route: "));
 
          if (pr->m_RouteNameString.IsEmpty())
            s.Append(_("(unnamed)"));
          else
            s.Append(pr->m_RouteNameString);
 
          s << "\n"
            << _("Total Length: ") << FormatDistanceAdaptive(pr->m_route_length)
            << "\n"
            << _("Leg: from ") << segShow_point_a->GetName() << _(" to ")
            << segShow_point_b->GetName() << "\n";
 
          if (g_bShowTrue)
            s << wxString::Format(wxString("%03d%c(T) ", wxConvUTF8),
                                  (int)floor(brg + 0.5), 0x00B0);
          if (g_bShowMag) {
            double latAverage =
                (segShow_point_b->m_lat + segShow_point_a->m_lat) / 2;
            double lonAverage =
                (segShow_point_b->m_lon + segShow_point_a->m_lon) / 2;
            double varBrg = gFrame->GetMag(brg, latAverage, lonAverage);
 
            s << wxString::Format(wxString("%03d%c(M) ", wxConvUTF8),
                                  (int)floor(varBrg + 0.5), 0x00B0);
          }
 
          s << FormatDistanceAdaptive(dist);
 
          // Compute and display cumulative distance from route start point to
          // current leg end point and RNG,TTG,ETA from ship to current leg end
          // point for active route
          double shiptoEndLeg = 0.;
          bool validActive = false;
          if (pr->IsActive() && (*pr->pRoutePointList->begin())->m_bIsActive)
            validActive = true;
 
          if (segShow_point_a != *pr->pRoutePointList->begin()) {
            auto node = pr->pRoutePointList->begin();
            RoutePoint *prp;
            float dist_to_endleg = 0;
            wxString t;
 
            for (++node; node != pr->pRoutePointList->end(); ++node) {
              prp = *node;
              if (validActive)
                shiptoEndLeg += prp->m_seg_len;
              else if (prp->m_bIsActive)
                validActive = true;
              dist_to_endleg += prp->m_seg_len;
              if (prp->IsSame(segShow_point_a)) break;
            }
            s << " (+" << FormatDistanceAdaptive(dist_to_endleg) << ")";
          }
          // write from ship to end selected leg point data if the route is
          // active
          if (validActive) {
            s << "\n"
              << _("From Ship To") << " " << segShow_point_b->GetName() << "\n";
            shiptoEndLeg +=
                g_pRouteMan
                    ->GetCurrentRngToActivePoint();  // add distance from ship
                                                     // to active point
            shiptoEndLeg +=
                segShow_point_b
                    ->m_seg_len;  // add the lenght of the selected leg
            s << FormatDistanceAdaptive(shiptoEndLeg);
            // ensure sog/cog are valid and vmg is positive to keep data
            // coherent
            double vmg = 0.;
            if (!std::isnan(gCog) && !std::isnan(gSog))
              vmg = gSog *
                    cos((g_pRouteMan->GetCurrentBrgToActivePoint() - gCog) *
                        PI / 180.);
            if (vmg > 0.) {
              float ttg_sec = (shiptoEndLeg / gSog) * 3600.;
              wxTimeSpan ttg_span = wxTimeSpan::Seconds((long)ttg_sec);
              s << " - "
                << wxString(ttg_sec > SECONDS_PER_DAY
                                ? ttg_span.Format(_("%Dd %H:%M"))
                                : ttg_span.Format(_("%H:%M")));
              wxDateTime dtnow, eta;
              eta = dtnow.SetToCurrent().Add(ttg_span);
              s << " - " << eta.Format("%b").Mid(0, 4)
                << eta.Format(" %d %H:%M");
            } else
              s << "   ----   ----";
          }
          m_pRouteRolloverWin->SetString(s);
 
          m_pRouteRolloverWin->SetBestPosition(mouse_x, mouse_y, 16, 16,
                                               LEG_ROLLOVER, win_size);
          m_pRouteRolloverWin->SetBitmap(LEG_ROLLOVER);
          m_pRouteRolloverWin->IsActive(true);
          b_need_refresh = true;
          showRouteRollover = true;
          break;
        }
      } else {
        ++node;
      }
    }
  } else {
    //    Is the cursor still in select radius, and not timed out?
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    if (!pSelect->IsSelectableSegmentSelected(ctx, m_cursor_lat, m_cursor_lon,
                                              m_pRolloverRouteSeg))
      showRouteRollover = false;
    else if (m_pRouteRolloverWin && !m_pRouteRolloverWin->IsActive())
      showRouteRollover = false;
    else
      showRouteRollover = true;
  }
 
  //    If currently creating a route, do not show this rollover window
  if (m_routeState) showRouteRollover = false;
 
  //    Similar for AIS target rollover window
  if (m_pAISRolloverWin && m_pAISRolloverWin->IsActive())
    showRouteRollover = false;
 
  if (m_pRouteRolloverWin /*&& m_pRouteRolloverWin->IsActive()*/ &&
      !showRouteRollover) {
    m_pRouteRolloverWin->IsActive(false);
    m_pRolloverRouteSeg = NULL;
    m_pRouteRolloverWin->Destroy();
    m_pRouteRolloverWin = NULL;
    b_need_refresh = true;
  } else if (m_pRouteRolloverWin && showRouteRollover) {
    m_pRouteRolloverWin->IsActive(true);
    b_need_refresh = true;
  }
 
  // Now the Track info rollover
  // Show the track segment info
  bool showTrackRollover = false;
 
  if (NULL == m_pRolloverTrackSeg) {
    //    Get a list of all selectable sgements, and search for the first
    //    visible segment as the rollover target.
 
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    SelectableItemList SelList = pSelect->FindSelectionList(
        ctx, m_cursor_lat, m_cursor_lon, SELTYPE_TRACKSEGMENT);
 
    auto node = SelList.begin();
    while (node != SelList.end()) {
      SelectItem *pFindSel = *node;
 
      Track *pt = (Track *)pFindSel->m_pData3;  // candidate
 
      if (pt && pt->IsVisible()) {
        m_pRolloverTrackSeg = pFindSel;
        showTrackRollover = true;
 
        if (NULL == m_pTrackRolloverWin) {
          m_pTrackRolloverWin = new RolloverWin(this, 10);
          m_pTrackRolloverWin->IsActive(false);
        }
 
        if (!m_pTrackRolloverWin->IsActive()) {
          wxString s;
          TrackPoint *segShow_point_a =
              (TrackPoint *)m_pRolloverTrackSeg->m_pData1;
          TrackPoint *segShow_point_b =
              (TrackPoint *)m_pRolloverTrackSeg->m_pData2;
 
          double brg, dist;
          DistanceBearingMercator(
              segShow_point_b->m_lat, segShow_point_b->m_lon,
              segShow_point_a->m_lat, segShow_point_a->m_lon, &brg, &dist);
 
          if (!pt->m_bIsInLayer)
            s.Append(_("Track") + ": ");
          else
            s.Append(_("Layer Track: "));
 
          if (pt->GetName().IsEmpty())
            s.Append(_("(unnamed)"));
          else
            s.Append(pt->GetName());
          double tlenght = pt->Length();
          s << "\n" << _("Total Track: ") << FormatDistanceAdaptive(tlenght);
          if (pt->GetLastPoint()->GetTimeString() &&
              pt->GetPoint(0)->GetTimeString()) {
            wxDateTime lastPointTime = pt->GetLastPoint()->GetCreateTime();
            wxDateTime zeroPointTime = pt->GetPoint(0)->GetCreateTime();
            if (lastPointTime.IsValid() && zeroPointTime.IsValid()) {
              wxTimeSpan ttime = lastPointTime - zeroPointTime;
              double htime = ttime.GetSeconds().ToDouble() / 3600.;
              s << wxString::Format("  %.1f ", (float)(tlenght / htime))
                << getUsrSpeedUnit();
              s << wxString(htime > 24. ? ttime.Format("  %Dd %H:%M")
                                        : ttime.Format("  %H:%M"));
            }
          }
 
          if (g_bShowTrackPointTime &&
              strlen(segShow_point_b->GetTimeString())) {
            wxString stamp = segShow_point_b->GetTimeString();
            wxDateTime timestamp = segShow_point_b->GetCreateTime();
            if (timestamp.IsValid()) {
              // Format track rollover timestamp to OCPN global TZ setting
              DateTimeFormatOptions opts =
                  DateTimeFormatOptions().SetTimezone("");
              stamp = ocpn::toUsrDateTimeFormat(timestamp.FromUTC(), opts);
            }
            s << "\n" << _("Segment Created: ") << stamp;
          }
 
          s << "\n";
          if (g_bShowTrue)
            s << wxString::Format(wxString("%03d%c ", wxConvUTF8), (int)brg,
                                  0x00B0);
 
          if (g_bShowMag) {
            double latAverage =
                (segShow_point_b->m_lat + segShow_point_a->m_lat) / 2;
            double lonAverage =
                (segShow_point_b->m_lon + segShow_point_a->m_lon) / 2;
            double varBrg = gFrame->GetMag(brg, latAverage, lonAverage);
 
            s << wxString::Format(wxString("%03d%c ", wxConvUTF8), (int)varBrg,
                                  0x00B0);
          }
 
          s << FormatDistanceAdaptive(dist);
 
          if (segShow_point_a->GetTimeString() &&
              segShow_point_b->GetTimeString()) {
            wxDateTime apoint = segShow_point_a->GetCreateTime();
            wxDateTime bpoint = segShow_point_b->GetCreateTime();
            if (apoint.IsValid() && bpoint.IsValid()) {
              double segmentSpeed = toUsrSpeed(
                  dist / ((bpoint - apoint).GetSeconds().ToDouble() / 3600.));
              s << wxString::Format("  %.1f ", (float)segmentSpeed)
                << getUsrSpeedUnit();
            }
          }
 
          m_pTrackRolloverWin->SetString(s);
 
          m_pTrackRolloverWin->SetBestPosition(mouse_x, mouse_y, 16, 16,
                                               LEG_ROLLOVER, win_size);
          m_pTrackRolloverWin->SetBitmap(LEG_ROLLOVER);
          m_pTrackRolloverWin->IsActive(true);
          b_need_refresh = true;
          showTrackRollover = true;
          break;
        }
      } else {
        ++node;
      }
    }
  } else {
    //    Is the cursor still in select radius, and not timed out?
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    if (!pSelect->IsSelectableSegmentSelected(ctx, m_cursor_lat, m_cursor_lon,
                                              m_pRolloverTrackSeg))
      showTrackRollover = false;
    else if (m_pTrackRolloverWin && !m_pTrackRolloverWin->IsActive())
      showTrackRollover = false;
    else
      showTrackRollover = true;
  }
 
  //    Similar for AIS target rollover window
  if (m_pAISRolloverWin && m_pAISRolloverWin->IsActive())
    showTrackRollover = false;
 
  //    Similar for route rollover window
  if (m_pRouteRolloverWin && m_pRouteRolloverWin->IsActive())
    showTrackRollover = false;
 
  // TODO  We onlt show tracks on primary canvas....
  // if(!IsPrimaryCanvas())
  //    showTrackRollover = false;
 
  if (m_pTrackRolloverWin /*&& m_pTrackRolloverWin->IsActive()*/ &&
      !showTrackRollover) {
    m_pTrackRolloverWin->IsActive(false);
    m_pRolloverTrackSeg = NULL;
    m_pTrackRolloverWin->Destroy();
    m_pTrackRolloverWin = NULL;
    b_need_refresh = true;
  } else if (m_pTrackRolloverWin && showTrackRollover) {
    m_pTrackRolloverWin->IsActive(true);
    b_need_refresh = true;
  }
 
  if (b_need_refresh) Refresh();
}
 
void ChartCanvas::OnCursorTrackTimerEvent(wxTimerEvent &event) {
  if ((GetShowENCLights() || m_bsectors_shown) &&
      s57_CheckExtendedLightSectors(this, mouse_x, mouse_y, VPoint,
                                    extendedSectorLegs)) {
    if (!m_bsectors_shown) {
      ReloadVP(false);
      m_bsectors_shown = true;
    }
  } else {
    if (m_bsectors_shown) {
      ReloadVP(false);
      m_bsectors_shown = false;
    }
  }
 
//      This is here because GTK status window update is expensive..
//            cairo using pango rebuilds the font every time so is very
//            inefficient
//      Anyway, only update the status bar when this timer expires
#if defined(__WXGTK__) || defined(__WXQT__)
  {
    //    Check the absolute range of the cursor position
    //    There could be a window wherein the chart geoereferencing is not
    //    valid....
    double cursor_lat, cursor_lon;
    GetCanvasPixPoint(mouse_x, mouse_y, cursor_lat, cursor_lon);
 
    if ((fabs(cursor_lat) < 90.) && (fabs(cursor_lon) < 360.)) {
      while (cursor_lon < -180.) cursor_lon += 360.;
 
      while (cursor_lon > 180.) cursor_lon -= 360.;
 
      SetCursorStatus(cursor_lat, cursor_lon);
    }
  }
#endif
}
 
void ChartCanvas::SetCursorStatus(double cursor_lat, double cursor_lon) {
  if (!parent_frame->m_pStatusBar) return;
 
  wxString s1;
  s1 += " ";
  s1 += toSDMM(1, cursor_lat);
  s1 += "   ";
  s1 += toSDMM(2, cursor_lon);
 
  if (STAT_FIELD_CURSOR_LL >= 0)
    parent_frame->SetStatusText(s1, STAT_FIELD_CURSOR_LL);
 
  if (STAT_FIELD_CURSOR_BRGRNG < 0) return;
 
  double brg, dist;
  wxString sm;
  wxString st;
  DistanceBearingMercator(cursor_lat, cursor_lon, gLat, gLon, &brg, &dist);
  if (g_bShowMag) sm.Printf("%03d%c(M)  ", (int)toMagnetic(brg), 0x00B0);
  if (g_bShowTrue) st.Printf("%03d%c(T)  ", (int)brg, 0x00B0);
 
  wxString s = st + sm;
  s << FormatDistanceAdaptive(dist);
 
  // CUSTOMIZATION - LIVE ETA OPTION
  // -------------------------------------------------------
  // Calculate an "live" ETA based on route starting from the current
  // position of the boat and goes to the cursor of the mouse.
  // In any case, an standard ETA will be calculated with a default speed
  // of the boat to give an estimation of the route (in particular if GPS
  // is off).
 
  // Display only if option "live ETA" is selected in Settings > Display >
  // General.
  if (g_bShowLiveETA) {
    float realTimeETA;
    float boatSpeed;
    float boatSpeedDefault = g_defaultBoatSpeed;
 
    // Calculate Estimate Time to Arrival (ETA) in minutes
    // Check before is value not closed to zero (it will make an very big
    // number...)
    if (!std::isnan(gSog)) {
      boatSpeed = gSog;
      if (boatSpeed < 0.5) {
        realTimeETA = 0;
      } else {
        realTimeETA = dist / boatSpeed * 60;
      }
    } else {
      realTimeETA = 0;
    }
 
    // Add space after distance display
    s << " ";
    // Display ETA
    s << minutesToHoursDays(realTimeETA);
 
    // In any case, display also an ETA with default speed at 6knts
 
    s << " [@";
    s << wxString::Format("%d", (int)toUsrSpeed(boatSpeedDefault, -1));
    s << wxString::Format("%s", getUsrSpeedUnit(-1));
    s << " ";
    s << minutesToHoursDays(dist / boatSpeedDefault * 60);
    s << "]";
  }
  // END OF - LIVE ETA OPTION
 
  parent_frame->SetStatusText(s, STAT_FIELD_CURSOR_BRGRNG);
}
 
// CUSTOMIZATION - FORMAT MINUTES
// -------------------------------------------------------
// New function to format minutes into a more readable format:
//  * Hours + minutes, or
//  * Days + hours.
wxString minutesToHoursDays(float timeInMinutes) {
  wxString s;
 
  if (timeInMinutes == 0) {
    s << "--min";
  }
 
  // Less than 60min, keep time in minutes
  else if (timeInMinutes < 60 && timeInMinutes != 0) {
    s << wxString::Format("%d", (int)timeInMinutes);
    s << "min";
  }
 
  // Between 1h and less than 24h, display time in hours, minutes
  else if (timeInMinutes >= 60 && timeInMinutes < 24 * 60) {
    int hours;
    int min;
    hours = (int)timeInMinutes / 60;
    min = (int)timeInMinutes % 60;
 
    if (min == 0) {
      s << wxString::Format("%d", hours);
      s << "h";
    } else {
      s << wxString::Format("%d", hours);
      s << "h";
      s << wxString::Format("%d", min);
      s << "min";
    }
 
  }
 
  // More than 24h, display time in days, hours
  else if (timeInMinutes > 24 * 60) {
    int days;
    int hours;
    days = (int)(timeInMinutes / 60) / 24;
    hours = (int)(timeInMinutes / 60) % 24;
 
    if (hours == 0) {
      s << wxString::Format("%d", days);
      s << "d";
    } else {
      s << wxString::Format("%d", days);
      s << "d";
      s << wxString::Format("%d", hours);
      s << "h";
    }
  }
 
  return s;
}
 
// END OF CUSTOMIZATION - FORMAT MINUTES
// Thanks open source code ;-)
// -------------------------------------------------------
 
void ChartCanvas::GetCursorLatLon(double *lat, double *lon) {
  double clat, clon;
  GetCanvasPixPoint(mouse_x, mouse_y, clat, clon);
  *lat = clat;
  *lon = clon;
}
 
void ChartCanvas::GetDoubleCanvasPointPix(double rlat, double rlon,
                                          wxPoint2DDouble *r) {
  return GetDoubleCanvasPointPixVP(GetVP(), rlat, rlon, r);
}
 
void ChartCanvas::GetDoubleCanvasPointPixVP(ViewPort &vp, double rlat,
                                            double rlon, wxPoint2DDouble *r) {
  // If the Current Chart is a raster chart, and the
  // requested lat/long is within the boundaries of the chart,
  // and the VP is not rotated,
  // then use the embedded BSB chart georeferencing algorithm
  // for greater accuracy
  // Additionally, use chart embedded georef if the projection is TMERC
  //  i.e. NOT MERCATOR and NOT POLYCONIC
 
  // If for some reason the chart rejects the request by returning an error,
  // then fall back to Viewport Projection estimate from canvas parameters
  if (!g_bopengl && m_singleChart &&
      (m_singleChart->GetChartFamily() == CHART_FAMILY_RASTER) &&
      (((fabs(vp.rotation) < .0001) && (fabs(vp.skew) < .0001)) ||
       ((m_singleChart->GetChartProjectionType() != PROJECTION_MERCATOR) &&
        (m_singleChart->GetChartProjectionType() !=
         PROJECTION_TRANSVERSE_MERCATOR) &&
        (m_singleChart->GetChartProjectionType() != PROJECTION_POLYCONIC))) &&
      (m_singleChart->GetChartProjectionType() == vp.m_projection_type) &&
      (m_singleChart->GetChartType() != CHART_TYPE_PLUGIN)) {
    ChartBaseBSB *Cur_BSB_Ch = dynamic_cast<ChartBaseBSB *>(m_singleChart);
    //                        bool bInside = G_FloatPtInPolygon ( ( MyFlPoint *
    //                        ) Cur_BSB_Ch->GetCOVRTableHead ( 0 ),
    //                                                            Cur_BSB_Ch->GetCOVRTablenPoints
    //                                                            ( 0 ), rlon,
    //                                                            rlat );
    //                        bInside = true;
    //                        if ( bInside )
    if (Cur_BSB_Ch) {
      //    This is a Raster chart....
      //    If the VP is changing, the raster chart parameters may not yet be
      //    setup So do that before accessing the chart's embedded
      //    georeferencing
      Cur_BSB_Ch->SetVPRasterParms(vp);
      double rpixxd, rpixyd;
      if (0 == Cur_BSB_Ch->latlong_to_pix_vp(rlat, rlon, rpixxd, rpixyd, vp)) {
        r->m_x = rpixxd;
        r->m_y = rpixyd;
        return;
      }
    }
  }
 
  //    if needed, use the VPoint scaling estimator,
  *r = vp.GetDoublePixFromLL(rlat, rlon);
}
 
// This routine might be deleted and all of the rendering improved
// to have floating point accuracy
bool ChartCanvas::GetCanvasPointPix(double rlat, double rlon, wxPoint *r) {
  return GetCanvasPointPixVP(GetVP(), rlat, rlon, r);
}
 
bool ChartCanvas::GetCanvasPointPixVP(ViewPort &vp, double rlat, double rlon,
                                      wxPoint *r) {
  wxPoint2DDouble p;
  GetDoubleCanvasPointPixVP(vp, rlat, rlon, &p);
 
  // some projections give nan values when invisible values (other side of
  // world) are requested we should stop using integer coordinates or return
  // false here (and test it everywhere)
  if (std::isnan(p.m_x)) {
    *r = wxPoint(INVALID_COORD, INVALID_COORD);
    return false;
  }
 
  if ((abs(p.m_x) < 1e6) && (abs(p.m_y) < 1e6))
    *r = wxPoint(wxRound(p.m_x), wxRound(p.m_y));
  else
    *r = wxPoint(INVALID_COORD, INVALID_COORD);
 
  return true;
}
 
void ChartCanvas::GetCanvasPixPoint(double x, double y, double &lat,
                                    double &lon) {
  // If the Current Chart is a raster chart, and the
  // requested x,y is within the boundaries of the chart,
  // and the VP is not rotated,
  // then use the embedded BSB chart georeferencing algorithm
  // for greater accuracy
  // Additionally, use chart embedded georef if the projection is TMERC
  //  i.e. NOT MERCATOR and NOT POLYCONIC
 
  // If for some reason the chart rejects the request by returning an error,
  // then fall back to Viewport Projection  estimate from canvas parameters
  bool bUseVP = true;
 
  if (!g_bopengl && m_singleChart &&
      (m_singleChart->GetChartFamily() == CHART_FAMILY_RASTER) &&
      (((fabs(GetVP().rotation) < .0001) && (fabs(GetVP().skew) < .0001)) ||
       ((m_singleChart->GetChartProjectionType() != PROJECTION_MERCATOR) &&
        (m_singleChart->GetChartProjectionType() !=
         PROJECTION_TRANSVERSE_MERCATOR) &&
        (m_singleChart->GetChartProjectionType() != PROJECTION_POLYCONIC))) &&
      (m_singleChart->GetChartProjectionType() == GetVP().m_projection_type) &&
      (m_singleChart->GetChartType() != CHART_TYPE_PLUGIN)) {
    ChartBaseBSB *Cur_BSB_Ch = dynamic_cast<ChartBaseBSB *>(m_singleChart);
 
    // TODO     maybe need iterative process to validate bInside
    //          first pass is mercator, then check chart boundaries
 
    if (Cur_BSB_Ch) {
      //    This is a Raster chart....
      //    If the VP is changing, the raster chart parameters may not yet be
      //    setup So do that before accessing the chart's embedded
      //    georeferencing
      Cur_BSB_Ch->SetVPRasterParms(GetVP());
 
      double slat, slon;
      if (0 == Cur_BSB_Ch->vp_pix_to_latlong(GetVP(), x, y, &slat, &slon)) {
        lat = slat;
 
        if (slon < -180.)
          slon += 360.;
        else if (slon > 180.)
          slon -= 360.;
 
        lon = slon;
        bUseVP = false;
      }
    }
  }
 
  //    if needed, use the VPoint scaling estimator
  if (bUseVP) {
    GetVP().GetLLFromPix(wxPoint2DDouble(x, y), &lat, &lon);
  }
}
 
void ChartCanvas::ZoomCanvasSimple(double factor) {
  StopMovement();
  DoZoomCanvas(factor, false);
  extendedSectorLegs.clear();
}
 
void ChartCanvas::ZoomCanvas(double factor, bool can_zoom_to_cursor,
                             bool stoptimer) {
  m_bzooming_to_cursor = can_zoom_to_cursor && g_bEnableZoomToCursor;
 
  if (g_bsmoothpanzoom) {
    if (StartTimedMovement(stoptimer)) {
      m_mustmove += 150; /* for quick presses register as 200 ms duration */
      m_zoom_factor = factor;
    }
 
    m_zoom_target = VPoint.chart_scale / factor;
  } else {
    if (m_modkeys == wxMOD_ALT) factor = pow(factor, .15);
 
    DoZoomCanvas(factor, can_zoom_to_cursor);
  }
 
  extendedSectorLegs.clear();
}
 
void ChartCanvas::DoZoomCanvas(double factor, bool can_zoom_to_cursor) {
  // possible on startup
  if (!ChartData) return;
  if (!m_pCurrentStack) return;
 
  /* TODO: queue the quilted loading code to a background thread
     so yield is never called from here, and also rendering is not delayed */
 
  //    Cannot allow Yield() re-entrancy here
  if (m_bzooming) return;
  m_bzooming = true;
 
  double old_ppm = GetVP().view_scale_ppm;
 
  //  Capture current cursor position for zoom to cursor
  double zlat = m_cursor_lat;
  double zlon = m_cursor_lon;
 
  double proposed_scale_onscreen =
      GetVP().chart_scale /
      factor;  // GetCanvasScaleFactor() / ( GetVPScale() * factor );
  bool b_do_zoom = false;
 
  if (factor > 1) {
    b_do_zoom = true;
 
    // double zoom_factor = factor;
 
    ChartBase *pc = NULL;
 
    if (!VPoint.b_quilt) {
      pc = m_singleChart;
    } else {
      if (!m_disable_adjust_on_zoom) {
        int new_db_index = m_pQuilt->AdjustRefOnZoomIn(proposed_scale_onscreen);
        if (new_db_index >= 0)
          pc = ChartData->OpenChartFromDB(new_db_index, FULL_INIT);
        else {  // for whatever reason, no reference chart is known
                // Choose the smallest scale chart on the current stack
                // and then adjust for scale range
          int current_ref_stack_index = -1;
          if (m_pCurrentStack->nEntry) {
            int trial_index =
                m_pCurrentStack->GetDBIndex(m_pCurrentStack->nEntry - 1);
            m_pQuilt->SetReferenceChart(trial_index);
            new_db_index = m_pQuilt->AdjustRefOnZoomIn(proposed_scale_onscreen);
            if (new_db_index >= 0)
              pc = ChartData->OpenChartFromDB(new_db_index, FULL_INIT);
          }
        }
 
        if (m_pCurrentStack)
          m_pCurrentStack->SetCurrentEntryFromdbIndex(
              new_db_index);  // highlite the correct bar entry
      }
    }
 
    if (pc) {
      //             double target_scale_ppm = GetVPScale() * zoom_factor;
      //             proposed_scale_onscreen = GetCanvasScaleFactor() /
      //             target_scale_ppm;
 
      //  Query the chart to determine the appropriate zoom range
      double min_allowed_scale =
          g_maxzoomin;  // Roughly, latitude dependent for mercator charts
 
      if (proposed_scale_onscreen < min_allowed_scale) {
        if (min_allowed_scale == GetCanvasScaleFactor() / (GetVPScale())) {
          m_zoom_factor = 1; /* stop zooming */
          b_do_zoom = false;
        } else
          proposed_scale_onscreen = min_allowed_scale;
      }
 
    } else {
      proposed_scale_onscreen = wxMax(proposed_scale_onscreen, g_maxzoomin);
    }
 
  } else if (factor < 1) {
    b_do_zoom = true;
 
    ChartBase *pc = NULL;
 
    bool b_smallest = false;
 
    if (!VPoint.b_quilt) {  // not quilted
      pc = m_singleChart;
 
      if (pc) {
        //      If m_singleChart is not on the screen, unbound the zoomout
        LLBBox viewbox = VPoint.GetBBox();
        //                BoundingBox chart_box;
        int current_index = ChartData->FinddbIndex(pc->GetFullPath());
        double max_allowed_scale;
 
        max_allowed_scale = GetCanvasScaleFactor() / m_absolute_min_scale_ppm;
 
        //  We can allow essentially unbounded zoomout in single chart mode
        //                if( ChartData->GetDBBoundingBox( current_index,
        //                &chart_box ) &&
        //                    !viewbox.IntersectOut( chart_box ) )
        //                    //  Clamp the minimum scale zoom-out to the value
        //                    specified by the chart max_allowed_scale =
        //                    wxMin(max_allowed_scale, 4.0 *
        //                                              pc->GetNormalScaleMax(
        //                                              GetCanvasScaleFactor(),
        //                                                                     GetCanvasWidth() ) );
        if (proposed_scale_onscreen > max_allowed_scale) {
          m_zoom_factor = 1; /* stop zooming */
          proposed_scale_onscreen = max_allowed_scale;
        }
      }
 
    } else {
      if (!m_disable_adjust_on_zoom) {
        int new_db_index =
            m_pQuilt->AdjustRefOnZoomOut(proposed_scale_onscreen);
        if (new_db_index >= 0)
          pc = ChartData->OpenChartFromDB(new_db_index, FULL_INIT);
 
        if (m_pCurrentStack)
          m_pCurrentStack->SetCurrentEntryFromdbIndex(
              new_db_index);  // highlite the correct bar entry
 
        b_smallest = m_pQuilt->IsChartSmallestScale(new_db_index);
 
        if (b_smallest || (0 == m_pQuilt->GetExtendedStackCount()))
          proposed_scale_onscreen =
              wxMin(proposed_scale_onscreen,
                    GetCanvasScaleFactor() / m_absolute_min_scale_ppm);
      }
 
      // set a minimum scale
      if ((GetCanvasScaleFactor() / proposed_scale_onscreen) <
          m_absolute_min_scale_ppm)
        proposed_scale_onscreen =
            GetCanvasScaleFactor() / m_absolute_min_scale_ppm;
    }
  }
  double new_scale =
      GetVPScale() * (GetVP().chart_scale / proposed_scale_onscreen);
 
  if (b_do_zoom) {
    // Disable ZTC if lookahead is ON, and currently b_follow is active
    bool b_allow_ztc = true;
    if (m_bFollow && m_bLookAhead) b_allow_ztc = false;
    if (can_zoom_to_cursor && g_bEnableZoomToCursor && b_allow_ztc) {
      if (m_bLookAhead) {
        double brg, distance;
        ll_gc_ll_reverse(gLat, gLon, GetVP().clat, GetVP().clon, &brg,
                         &distance);
        dir_to_shift = brg;
        meters_to_shift = distance * 1852;
      }
      //  Arrange to combine the zoom and pan into one operation for smoother
      //  appearance
      SetVPScale(new_scale, false);  // adjust, but deferred refresh
      wxPoint r;
      GetCanvasPointPix(zlat, zlon, &r);
      // this will emit the Refresh()
      PanCanvas(r.x - mouse_x, r.y - mouse_y);
    } else {
      SetVPScale(new_scale);
      if (m_bFollow) DoCanvasUpdate();
    }
  }
 
  m_bzooming = false;
}
 
void ChartCanvas::SetAbsoluteMinScale(double min_scale) {
  double x_scale_ppm = GetCanvasScaleFactor() / min_scale;
  m_absolute_min_scale_ppm = wxMax(m_absolute_min_scale_ppm, x_scale_ppm);
}
 
int rot;
void ChartCanvas::RotateCanvas(double dir) {
  // SetUpMode(NORTH_UP_MODE);
 
  if (g_bsmoothpanzoom) {
    if (StartTimedMovement()) {
      m_mustmove += 150; /* for quick presses register as 200 ms duration */
      m_rotation_speed = dir * 60;
    }
  } else {
    double speed = dir * 10;
    if (m_modkeys == wxMOD_ALT) speed /= 20;
    DoRotateCanvas(VPoint.rotation + PI / 180 * speed);
  }
}
 
void ChartCanvas::DoRotateCanvas(double rotation) {
  while (rotation < 0) rotation += 2 * PI;
  while (rotation > 2 * PI) rotation -= 2 * PI;
 
  if (rotation == VPoint.rotation || std::isnan(rotation)) return;
 
  SetVPRotation(rotation);
  parent_frame->UpdateRotationState(VPoint.rotation);
}
 
void ChartCanvas::DoTiltCanvas(double tilt) {
  while (tilt < 0) tilt = 0;
  while (tilt > .95) tilt = .95;
 
  if (tilt == VPoint.tilt || std::isnan(tilt)) return;
 
  VPoint.tilt = tilt;
  Refresh(false);
}
 
void ChartCanvas::TogglebFollow() {
  if (!m_bFollow)
    SetbFollow();
  else
    ClearbFollow();
}
 
void ChartCanvas::ClearbFollow() {
  m_bFollow = false;  // update the follow flag
 
  parent_frame->SetMenubarItemState(ID_MENU_NAV_FOLLOW, false);
 
  UpdateFollowButtonState();
 
  DoCanvasUpdate();
  ReloadVP();
  parent_frame->SetChartUpdatePeriod();
}
 
void ChartCanvas::SetbFollow() {
  // Is the OWNSHIP on-screen?
  // If not, then reset the OWNSHIP offset to 0 (center screen)
  if ((fabs(m_OSoffsetx) > VPoint.pix_width / 2) ||
      (fabs(m_OSoffsety) > VPoint.pix_height / 2)) {
    m_OSoffsetx = 0;
    m_OSoffsety = 0;
  }
 
  // Apply the present b_follow offset values to ship position
  wxPoint2DDouble p;
  GetDoubleCanvasPointPix(gLat, gLon, &p);
  p.m_x += m_OSoffsetx;
  p.m_y -= m_OSoffsety;
 
  // compute the target center screen lat/lon
  double dlat, dlon;
  GetCanvasPixPoint(p.m_x, p.m_y, dlat, dlon);
 
  JumpToPosition(dlat, dlon, GetVPScale());
  m_bFollow = true;
 
  parent_frame->SetMenubarItemState(ID_MENU_NAV_FOLLOW, true);
  UpdateFollowButtonState();
 
  if (!g_bSmoothRecenter) {
    DoCanvasUpdate();
    ReloadVP();
  }
  parent_frame->SetChartUpdatePeriod();
}
 
void ChartCanvas::UpdateFollowButtonState() {
  if (m_muiBar) {
    if (!m_bFollow)
      m_muiBar->SetFollowButtonState(0);
    else {
      if (m_bLookAhead)
        m_muiBar->SetFollowButtonState(2);
      else
        m_muiBar->SetFollowButtonState(1);
    }
  }
 
#ifdef __ANDROID__
  if (!m_bFollow)
    androidSetFollowTool(0);
  else {
    if (m_bLookAhead)
      androidSetFollowTool(2);
    else
      androidSetFollowTool(1);
  }
#endif
 
  //        Look for plugin using API-121 or later
  //        If found, make the follow state callback.
  if (g_pi_manager) {
    for (auto pic : *PluginLoader::GetInstance()->GetPlugInArray()) {
      if (pic->m_enabled && pic->m_init_state) {
        switch (pic->m_api_version) {
          case 121: {
            auto *ppi = dynamic_cast<opencpn_plugin_121 *>(pic->m_pplugin);
            if (ppi) ppi->UpdateFollowState(m_canvasIndex, m_bFollow);
            break;
          }
          default:
            break;
        }
      }
    }
  }
}
 
void ChartCanvas::JumpToPosition(double lat, double lon, double scale_ppm) {
  if (g_bSmoothRecenter && !m_routeState) {
    if (StartSmoothJump(lat, lon, scale_ppm))
      return;
    else {
      // move closer to the target destination, and try again
      double gcDist, gcBearingEnd;
      Geodesic::GreatCircleDistBear(m_vLon, m_vLat, lon, lat, &gcDist, NULL,
                                    &gcBearingEnd);
      gcBearingEnd += 180;
      double lat_offset = cos(gcBearingEnd * PI / 180.) * 0.5 *
                          GetCanvasWidth() / GetVPScale();  // meters
      double lon_offset =
          sin(gcBearingEnd * PI / 180.) * 0.5 * GetCanvasWidth() / GetVPScale();
      double new_lat = lat + (lat_offset / (1852 * 60));
      double new_lon = lon + (lon_offset / (1852 * 60));
      SetViewPoint(new_lat, new_lon);
      ReloadVP();
      StartSmoothJump(lat, lon, scale_ppm);
      return;
    }
  }
 
  if (lon > 180.0) lon -= 360.0;
  m_vLat = lat;
  m_vLon = lon;
  StopMovement();
  m_bFollow = false;
 
  if (!GetQuiltMode()) {
    double skew = 0;
    if (m_singleChart) skew = m_singleChart->GetChartSkew() * PI / 180.;
    SetViewPoint(lat, lon, scale_ppm, skew, GetVPRotation());
  } else {
    if (scale_ppm != GetVPScale()) {
      // XXX should be done in SetViewPoint
      VPoint.chart_scale = m_canvas_scale_factor / (scale_ppm);
      AdjustQuiltRefChart();
    }
    SetViewPoint(lat, lon, scale_ppm, 0, GetVPRotation());
  }
 
  ReloadVP();
 
  UpdateFollowButtonState();
 
  // TODO
  //    if( g_pi_manager ) {
  //        g_pi_manager->SendViewPortToRequestingPlugIns( cc1->GetVP() );
  //    }
}
 
bool ChartCanvas::StartSmoothJump(double lat, double lon, double scale_ppm) {
  // Check distance to jump, in pixels at current chart scale
  //  Modify smooth jump dynamics if jump distance is greater than 0.5x screen
  //  width.
  double gcDist;
  Geodesic::GreatCircleDistBear(m_vLon, m_vLat, lon, lat, &gcDist, NULL, NULL);
  double distance_pixels = gcDist * GetVPScale();
  if (distance_pixels > 0.5 * GetCanvasWidth()) {
    // Jump is too far, try again
    return false;
  }
 
  // Save where we're coming from
  m_startLat = m_vLat;
  m_startLon = m_vLon;
  m_startScale = GetVPScale();  // or VPoint.view_scale_ppm
 
  // Save where we want to end up
  m_endLat = lat;
  m_endLon = (lon > 180.0) ? (lon - 360.0) : lon;
  m_endScale = scale_ppm;
 
  // Setup timing
  m_animationDuration = 600;  // ms
  m_animationStart = wxGetLocalTimeMillis();
 
  // Stop any previous movement, ensure no conflicts
  StopMovement();
  m_bFollow = false;
 
  // Start the timer with ~60 FPS (16 ms). Tweak as needed.
  m_easeTimer.Start(16, wxTIMER_CONTINUOUS);
  m_animationActive = true;
 
  return true;
}
 
void ChartCanvas::OnJumpEaseTimer(wxTimerEvent &event) {
  // Calculate time fraction from 0..1
  wxLongLong now = wxGetLocalTimeMillis();
  double elapsed = (now - m_animationStart).ToDouble();
  double t = elapsed / m_animationDuration.ToDouble();
  if (t > 1.0) t = 1.0;
 
  // Ease function for smoother movement
  double e = easeOutCubic(t);
 
  // Interpolate lat/lon/scale
  double curLat = m_startLat + (m_endLat - m_startLat) * e;
  double curLon = m_startLon + (m_endLon - m_startLon) * e;
  double curScale = m_startScale + (m_endScale - m_startScale) * e;
 
  // Update viewpoint
  // (Essentially the same code used in JumpToPosition, but skipping the "snap"
  // portion)
  SetViewPoint(curLat, curLon, curScale, 0.0, GetVPRotation());
  ReloadVP();
 
  // If we reached the end, stop the timer and finalize
  if (t >= 1.0) {
    m_easeTimer.Stop();
    m_animationActive = false;
    UpdateFollowButtonState();
    ZoomCanvasSimple(1.0001);
    DoCanvasUpdate();
    ReloadVP();
  }
}
 
bool ChartCanvas::PanCanvas(double dx, double dy) {
  if (!ChartData) return false;
  extendedSectorLegs.clear();
 
  double dlat, dlon;
  wxPoint2DDouble p(VPoint.pix_width / 2.0, VPoint.pix_height / 2.0);
 
  int iters = 0;
  for (;;) {
    GetCanvasPixPoint(p.m_x + trunc(dx), p.m_y + trunc(dy), dlat, dlon);
 
    if (iters++ > 5) return false;
    if (!std::isnan(dlat)) break;
 
    dx *= .5, dy *= .5;
    if (fabs(dx) < 1 && fabs(dy) < 1) return false;
  }
 
  // avoid overshooting the poles
  if (dlat > 90)
    dlat = 90;
  else if (dlat < -90)
    dlat = -90;
 
  if (dlon > 360.) dlon -= 360.;
  if (dlon < -360.) dlon += 360.;
 
  //    This should not really be necessary, but round-trip georef on some
  //    charts is not perfect, So we can get creep on repeated unidimensional
  //    pans, and corrupt chart cacheing.......
 
  //    But this only works on north-up projections
  // TODO: can we remove this now?
  //     if( ( ( fabs( GetVP().skew ) < .001 ) ) && ( fabs( GetVP().rotation ) <
  //     .001 ) ) {
  //
  //         if( dx == 0 ) dlon = clon;
  //         if( dy == 0 ) dlat = clat;
  //     }
 
  int cur_ref_dbIndex = m_pQuilt->GetRefChartdbIndex();
 
  SetViewPoint(dlat, dlon, VPoint.view_scale_ppm, VPoint.skew, VPoint.rotation);
 
  if (VPoint.b_quilt) {
    int new_ref_dbIndex = m_pQuilt->GetRefChartdbIndex();
    if ((new_ref_dbIndex != cur_ref_dbIndex) && (new_ref_dbIndex != -1)) {
      // Tweak the scale slightly for a new ref chart
      ChartBase *pc = ChartData->OpenChartFromDB(new_ref_dbIndex, FULL_INIT);
      if (pc) {
        double tweak_scale_ppm =
            pc->GetNearestPreferredScalePPM(VPoint.view_scale_ppm);
        SetVPScale(tweak_scale_ppm);
      }
    }
 
    if (new_ref_dbIndex == -1) {
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Warray-bounds"
      // The compiler sees a -1 index being used. Does not happen, though.
 
      // for whatever reason, no reference chart is known
      // Probably panned out of the coverage region
      // If any charts are anywhere on-screen, choose the smallest
      // scale chart on the screen to be a new reference chart.
      int trial_index = -1;
      if (m_pCurrentStack->nEntry) {
        int trial_index =
            m_pCurrentStack->GetDBIndex(m_pCurrentStack->nEntry - 1);
      }
 
      if (trial_index < 0) {
        auto full_screen_array = GetQuiltFullScreendbIndexArray();
        if (full_screen_array.size())
          trial_index = full_screen_array[full_screen_array.size() - 1];
      }
 
      if (trial_index >= 0) {
        m_pQuilt->SetReferenceChart(trial_index);
        SetViewPoint(dlat, dlon, VPoint.view_scale_ppm, VPoint.skew,
                     VPoint.rotation);
        ReloadVP();
      }
#pragma GCC diagnostic pop
    }
  }
 
  //  Turn off bFollow only if the ownship has left the screen
  if (m_bFollow) {
    double offx, offy;
    toSM(dlat, dlon, gLat, gLon, &offx, &offy);
 
    double offset_angle = atan2(offy, offx);
    double offset_distance = sqrt((offy * offy) + (offx * offx));
    double chart_angle = GetVPRotation();
    double target_angle = chart_angle - offset_angle;
    double d_east_mod = offset_distance * cos(target_angle);
    double d_north_mod = offset_distance * sin(target_angle);
 
    m_OSoffsetx = d_east_mod * VPoint.view_scale_ppm;
    m_OSoffsety = -d_north_mod * VPoint.view_scale_ppm;
 
    if (m_bFollow && ((fabs(m_OSoffsetx) > VPoint.pix_width / 2) ||
                      (fabs(m_OSoffsety) > VPoint.pix_height / 2))) {
      m_bFollow = false;  // update the follow flag
      UpdateFollowButtonState();
    }
  }
 
  Refresh(false);
 
  pCurTrackTimer->Start(m_curtrack_timer_msec, wxTIMER_ONE_SHOT);
 
  return true;
}
 
bool ChartCanvas::IsOwnshipOnScreen() {
  wxPoint r;
  GetCanvasPointPix(gLat, gLon, &r);
  if (((r.x > 0) && r.x < GetCanvasWidth()) &&
      ((r.y > 0) && r.y < GetCanvasHeight()))
    return true;
  else
    return false;
}
 
void ChartCanvas::ReloadVP(bool b_adjust) {
  if (g_brightness_init) SetScreenBrightness(g_nbrightness);
 
  LoadVP(VPoint, b_adjust);
}
 
void ChartCanvas::LoadVP(ViewPort &vp, bool b_adjust) {
#ifdef ocpnUSE_GL
  if (g_bopengl && m_glcc) {
    m_glcc->Invalidate();
    if (m_glcc->GetSize() != GetSize()) {
      m_glcc->SetSize(GetSize());
    }
  } else
#endif
  {
    m_cache_vp.Invalidate();
    m_bm_cache_vp.Invalidate();
  }
 
  VPoint.Invalidate();
 
  if (m_pQuilt) m_pQuilt->Invalidate();
 
  //  Make sure that the Selected Group is sensible...
  //    if( m_groupIndex > (int) g_pGroupArray->GetCount() )
  //        m_groupIndex = 0;
  //    if( !CheckGroup( m_groupIndex ) )
  //        m_groupIndex = 0;
 
  SetViewPoint(vp.clat, vp.clon, vp.view_scale_ppm, vp.skew, vp.rotation,
               vp.m_projection_type, b_adjust);
}
 
void ChartCanvas::SetQuiltRefChart(int dbIndex) {
  m_pQuilt->SetReferenceChart(dbIndex);
  VPoint.Invalidate();
  m_pQuilt->Invalidate();
}
 
double ChartCanvas::GetBestStartScale(int dbi_hint, const ViewPort &vp) {
  if (m_pQuilt)
    return m_pQuilt->GetBestStartScale(dbi_hint, vp);
  else
    return vp.view_scale_ppm;
}
 
//      Verify and adjust the current reference chart,
//      so that it will not lead to excessive overzoom or underzoom onscreen
int ChartCanvas::AdjustQuiltRefChart() {
  int ret = -1;
  if (m_pQuilt) {
    wxASSERT(ChartData);
    ChartBase *pc =
        ChartData->OpenChartFromDB(m_pQuilt->GetRefChartdbIndex(), FULL_INIT);
    if (pc) {
      double min_ref_scale =
          pc->GetNormalScaleMin(m_canvas_scale_factor, false);
      double max_ref_scale =
          pc->GetNormalScaleMax(m_canvas_scale_factor, m_canvas_width);
 
      if (VPoint.chart_scale < min_ref_scale) {
        ret = m_pQuilt->AdjustRefOnZoomIn(VPoint.chart_scale);
      } else if (VPoint.chart_scale > max_ref_scale * 64) {
        ret = m_pQuilt->AdjustRefOnZoomOut(VPoint.chart_scale);
      } else {
        bool brender_ok = IsChartLargeEnoughToRender(pc, VPoint);
 
        if (!brender_ok) {
          int target_stack_index = wxNOT_FOUND;
          int il = 0;
          for (auto index : m_pQuilt->GetExtendedStackIndexArray()) {
            if (index == m_pQuilt->GetRefChartdbIndex()) {
              target_stack_index = il;
              break;
            }
            il++;
          }
          if (wxNOT_FOUND == target_stack_index)  // should never happen...
            target_stack_index = 0;
 
          int ref_family = pc->GetChartFamily();
          int extended_array_count =
              m_pQuilt->GetExtendedStackIndexArray().size();
          while ((!brender_ok) &&
                 ((int)target_stack_index < (extended_array_count - 1))) {
            target_stack_index++;
            int test_db_index =
                m_pQuilt->GetExtendedStackIndexArray()[target_stack_index];
 
            if ((ref_family == ChartData->GetDBChartFamily(test_db_index)) &&
                IsChartQuiltableRef(test_db_index)) {
              //    open the target, and check the min_scale
              ChartBase *ptest_chart =
                  ChartData->OpenChartFromDB(test_db_index, FULL_INIT);
              if (ptest_chart) {
                brender_ok = IsChartLargeEnoughToRender(ptest_chart, VPoint);
              }
            }
          }
 
          if (brender_ok) {  // found a better reference chart
            int new_db_index =
                m_pQuilt->GetExtendedStackIndexArray()[target_stack_index];
            if ((ref_family == ChartData->GetDBChartFamily(new_db_index)) &&
                IsChartQuiltableRef(new_db_index)) {
              m_pQuilt->SetReferenceChart(new_db_index);
              ret = new_db_index;
            } else
              ret = m_pQuilt->GetRefChartdbIndex();
          } else
            ret = m_pQuilt->GetRefChartdbIndex();
 
        } else
          ret = m_pQuilt->GetRefChartdbIndex();
      }
    } else
      ret = -1;
  }
 
  return ret;
}
 
void ChartCanvas::UpdateCanvasOnGroupChange() {
  delete m_pCurrentStack;
  m_pCurrentStack = new ChartStack;
  wxASSERT(ChartData);
  ChartData->BuildChartStack(m_pCurrentStack, VPoint.clat, VPoint.clon,
                             m_groupIndex);
 
  if (m_pQuilt) {
    m_pQuilt->Compose(VPoint);
    SetFocus();
  }
}
 
bool ChartCanvas::SetViewPointByCorners(double latSW, double lonSW,
                                        double latNE, double lonNE) {
  // Center Point
  double latc = (latSW + latNE) / 2.0;
  double lonc = (lonSW + lonNE) / 2.0;
 
  // Get scale in ppm (latitude)
  double ne_easting, ne_northing;
  toSM(latNE, lonNE, latc, lonc, &ne_easting, &ne_northing);
 
  double sw_easting, sw_northing;
  toSM(latSW, lonSW, latc, lonc, &sw_easting, &sw_northing);
 
  double scale_ppm = VPoint.pix_height / fabs(ne_northing - sw_northing);
 
  return SetViewPoint(latc, lonc, scale_ppm, VPoint.skew, VPoint.rotation);
}
 
bool ChartCanvas::SetVPScale(double scale, bool refresh) {
  return SetViewPoint(VPoint.clat, VPoint.clon, scale, VPoint.skew,
                      VPoint.rotation, VPoint.m_projection_type, true, refresh);
}
 
bool ChartCanvas::SetVPProjection(int projection) {
  if (!g_bopengl)  // alternative projections require opengl
    return false;
 
  // the view scale varies depending on geographic location and projection
  // rescale to keep the relative scale on the screen the same
  double prev_true_scale_ppm = m_true_scale_ppm;
  return SetViewPoint(VPoint.clat, VPoint.clon, VPoint.view_scale_ppm,
                      VPoint.skew, VPoint.rotation, projection) &&
         SetVPScale(wxMax(
             VPoint.view_scale_ppm * prev_true_scale_ppm / m_true_scale_ppm,
             m_absolute_min_scale_ppm));
}
 
bool ChartCanvas::SetViewPoint(double lat, double lon) {
  return SetViewPoint(lat, lon, VPoint.view_scale_ppm, VPoint.skew,
                      VPoint.rotation);
}
 
bool ChartCanvas::SetVPRotation(double angle) {
  return SetViewPoint(VPoint.clat, VPoint.clon, VPoint.view_scale_ppm,
                      VPoint.skew, angle);
}
bool ChartCanvas::SetViewPoint(double lat, double lon, double scale_ppm,
                               double skew, double rotation, int projection,
                               bool b_adjust, bool b_refresh) {
  bool b_ret = false;
  if (skew > PI) /* so our difference tests work, put in range of +-Pi */
    skew -= 2 * PI;
  //  Any sensible change?
  if (VPoint.IsValid()) {
    if ((fabs(VPoint.view_scale_ppm - scale_ppm) / scale_ppm < 1e-5) &&
        (fabs(VPoint.skew - skew) < 1e-9) &&
        (fabs(VPoint.rotation - rotation) < 1e-9) &&
        (fabs(VPoint.clat - lat) < 1e-9) && (fabs(VPoint.clon - lon) < 1e-9) &&
        (VPoint.m_projection_type == projection ||
         projection == PROJECTION_UNKNOWN))
      return false;
  }
  if (VPoint.m_projection_type != projection)
    VPoint.InvalidateTransformCache();  // invalidate
 
  //    Take a local copy of the last viewport
  ViewPort last_vp = VPoint;
 
  VPoint.skew = skew;
  VPoint.clat = lat;
  VPoint.clon = lon;
  VPoint.rotation = rotation;
  VPoint.view_scale_ppm = scale_ppm;
  if (projection != PROJECTION_UNKNOWN)
    VPoint.SetProjectionType(projection);
  else if (VPoint.m_projection_type == PROJECTION_UNKNOWN)
    VPoint.SetProjectionType(PROJECTION_MERCATOR);
 
  // don't allow latitude above 88 for mercator (90 is infinity)
  if (VPoint.m_projection_type == PROJECTION_MERCATOR ||
      VPoint.m_projection_type == PROJECTION_TRANSVERSE_MERCATOR) {
    if (VPoint.clat > 89.5)
      VPoint.clat = 89.5;
    else if (VPoint.clat < -89.5)
      VPoint.clat = -89.5;
  }
 
  // don't zoom out too far for transverse mercator polyconic until we resolve
  // issues
  if (VPoint.m_projection_type == PROJECTION_POLYCONIC ||
      VPoint.m_projection_type == PROJECTION_TRANSVERSE_MERCATOR)
    VPoint.view_scale_ppm = wxMax(VPoint.view_scale_ppm, 2e-4);
 
  // SetVPRotation(rotation);
 
  if (!g_bopengl)  // tilt is not possible without opengl
    VPoint.tilt = 0;
 
  if ((VPoint.pix_width <= 0) ||
      (VPoint.pix_height <= 0))  // Canvas parameters not yet set
    return false;
 
  bool bwasValid = VPoint.IsValid();
  VPoint.Validate();  // Mark this ViewPoint as OK
 
  //  Has the Viewport scale changed?  If so, invalidate the vp
  if (last_vp.view_scale_ppm != scale_ppm) {
    m_cache_vp.Invalidate();
    InvalidateGL();
  }
 
  //  A preliminary value, may be tweaked below
  VPoint.chart_scale = m_canvas_scale_factor / (scale_ppm);
 
  // recompute cursor position
  // and send to interested plugins if the mouse is actually in this window
  int mouseX = mouse_x;
  int mouseY = mouse_y;
  if ((mouseX > 0) && (mouseX < VPoint.pix_width) && (mouseY > 0) &&
      (mouseY < VPoint.pix_height)) {
    double lat, lon;
    GetCanvasPixPoint(mouseX, mouseY, lat, lon);
    m_cursor_lat = lat;
    m_cursor_lon = lon;
    SendCursorLatLonToAllPlugIns(lat, lon);
  }
 
  if (!VPoint.b_quilt && m_singleChart) {
    VPoint.SetBoxes();
 
    //  Allow the chart to adjust the new ViewPort for performance optimization
    //  This will normally be only a fractional (i.e.sub-pixel) adjustment...
    if (b_adjust) m_singleChart->AdjustVP(last_vp, VPoint);
 
    // If there is a sensible change in the chart render, refresh the whole
    // screen
    if ((!m_cache_vp.IsValid()) ||
        (m_cache_vp.view_scale_ppm != VPoint.view_scale_ppm)) {
      Refresh(false);
      b_ret = true;
    } else {
      wxPoint cp_last, cp_this;
      GetCanvasPointPix(m_cache_vp.clat, m_cache_vp.clon, &cp_last);
      GetCanvasPointPix(VPoint.clat, VPoint.clon, &cp_this);
 
      if (cp_last != cp_this) {
        Refresh(false);
        b_ret = true;
      }
    }
    //  Create the stack
    if (m_pCurrentStack) {
      assert(ChartData != 0);
      int current_db_index;
      current_db_index =
          m_pCurrentStack->GetCurrentEntrydbIndex();  // capture the current
 
      ChartData->BuildChartStack(m_pCurrentStack, lat, lon, current_db_index,
                                 m_groupIndex);
      m_pCurrentStack->SetCurrentEntryFromdbIndex(current_db_index);
    }
 
    if (!g_bopengl) VPoint.b_MercatorProjectionOverride = false;
  }
 
  //  Handle the quilted case
  if (VPoint.b_quilt) {
    VPoint.SetBoxes();
 
    if (last_vp.view_scale_ppm != scale_ppm)
      m_pQuilt->InvalidateAllQuiltPatchs();
 
    //  Create the quilt
    if (ChartData /*&& ChartData->IsValid()*/) {
      if (!m_pCurrentStack) return false;
 
      int current_db_index;
      current_db_index =
          m_pCurrentStack->GetCurrentEntrydbIndex();  // capture the current
 
      ChartData->BuildChartStack(m_pCurrentStack, lat, lon, m_groupIndex);
      m_pCurrentStack->SetCurrentEntryFromdbIndex(current_db_index);
 
      //   Check to see if the current quilt reference chart is in the new stack
      int current_ref_stack_index = -1;
      for (int i = 0; i < m_pCurrentStack->nEntry; i++) {
        if (m_pQuilt->GetRefChartdbIndex() == m_pCurrentStack->GetDBIndex(i))
          current_ref_stack_index = i;
      }
 
      if (g_bFullScreenQuilt) {
        current_ref_stack_index = m_pQuilt->GetRefChartdbIndex();
      }
 
      // We might need a new Reference Chart
      bool b_needNewRef = false;
 
      //    If the new stack does not contain the current ref chart....
      if ((-1 == current_ref_stack_index) &&
          (m_pQuilt->GetRefChartdbIndex() >= 0))
        b_needNewRef = true;
 
      // Would the current Ref Chart be excessively underzoomed?
      // We need to check this here to be sure, since we cannot know where the
      // reference chart was assigned. For instance, the reference chart may
      // have been selected from the config file, or from a long jump with a
      // chart family switch implicit. Anyway, we check to be sure....
      bool renderable = true;
      ChartBase *referenceChart =
          ChartData->OpenChartFromDB(m_pQuilt->GetRefChartdbIndex(), FULL_INIT);
      if (referenceChart) {
        double chartMaxScale = referenceChart->GetNormalScaleMax(
            GetCanvasScaleFactor(), GetCanvasWidth());
        renderable = chartMaxScale * 64 >= VPoint.chart_scale;
      }
      if (!renderable) b_needNewRef = true;
 
      //    Need new refchart?
      if (b_needNewRef && !m_disable_adjust_on_zoom) {
        const ChartTableEntry &cte_ref =
            ChartData->GetChartTableEntry(m_pQuilt->GetRefChartdbIndex());
        int target_scale = cte_ref.GetScale();
        int target_type = cte_ref.GetChartType();
        int candidate_stack_index;
 
        //    reset the ref chart in a way that does not lead to excessive
        //    underzoom, for performance reasons Try to find a chart that is the
        //    same type, and has a scale of just smaller than the current ref
        //    chart
 
        candidate_stack_index = 0;
        while (candidate_stack_index <= m_pCurrentStack->nEntry - 1) {
          const ChartTableEntry &cte_candidate = ChartData->GetChartTableEntry(
              m_pCurrentStack->GetDBIndex(candidate_stack_index));
          int candidate_scale = cte_candidate.GetScale();
          int candidate_type = cte_candidate.GetChartType();
 
          if ((candidate_scale >= target_scale) &&
              (candidate_type == target_type)) {
            bool renderable = true;
            ChartBase *tentative_referenceChart = ChartData->OpenChartFromDB(
                m_pCurrentStack->GetDBIndex(candidate_stack_index), FULL_INIT);
            if (tentative_referenceChart) {
              double chartMaxScale =
                  tentative_referenceChart->GetNormalScaleMax(
                      GetCanvasScaleFactor(), GetCanvasWidth());
              renderable = chartMaxScale * 1.5 > VPoint.chart_scale;
            }
 
            if (renderable) break;
          }
 
          candidate_stack_index++;
        }
 
        //    If that did not work, look for a chart of just larger scale and
        //    same type
        if (candidate_stack_index >= m_pCurrentStack->nEntry) {
          candidate_stack_index = m_pCurrentStack->nEntry - 1;
          while (candidate_stack_index >= 0) {
            int idx = m_pCurrentStack->GetDBIndex(candidate_stack_index);
            if (idx >= 0) {
              const ChartTableEntry &cte_candidate =
                  ChartData->GetChartTableEntry(idx);
              int candidate_scale = cte_candidate.GetScale();
              int candidate_type = cte_candidate.GetChartType();
 
              if ((candidate_scale <= target_scale) &&
                  (candidate_type == target_type))
                break;
            }
            candidate_stack_index--;
          }
        }
 
        // and if that did not work, chose stack entry 0
        if ((candidate_stack_index >= m_pCurrentStack->nEntry) ||
            (candidate_stack_index < 0))
          candidate_stack_index = 0;
 
        int new_ref_index = m_pCurrentStack->GetDBIndex(candidate_stack_index);
 
        m_pQuilt->SetReferenceChart(new_ref_index);  // maybe???
      }
 
      if (!g_bopengl) {
        // Preset the VPoint projection type to match what the quilt projection
        // type will be
        int ref_db_index = m_pQuilt->GetRefChartdbIndex(), proj;
 
        // Always keep the default Mercator projection if the reference chart is
        // not in the PatchList or the scale is too small for it to render.
 
        bool renderable = true;
        ChartBase *referenceChart =
            ChartData->OpenChartFromDB(ref_db_index, FULL_INIT);
        if (referenceChart) {
          double chartMaxScale = referenceChart->GetNormalScaleMax(
              GetCanvasScaleFactor(), GetCanvasWidth());
          renderable = chartMaxScale * 1.5 > VPoint.chart_scale;
          proj = ChartData->GetDBChartProj(ref_db_index);
        } else
          proj = PROJECTION_MERCATOR;
 
        VPoint.b_MercatorProjectionOverride =
            (m_pQuilt->GetnCharts() == 0 || !renderable);
 
        if (VPoint.b_MercatorProjectionOverride) proj = PROJECTION_MERCATOR;
 
        VPoint.SetProjectionType(proj);
      }
 
      //    If this quilt will be a perceptible delta from the existing quilt,
      //    then refresh the entire screen
      if (m_pQuilt->IsQuiltDelta(VPoint)) {
        //  Allow the quilt to adjust the new ViewPort for performance
        //  optimization This will normally be only a fractional (i.e.
        //  sub-pixel) adjustment...
        if (b_adjust) {
          m_pQuilt->AdjustQuiltVP(last_vp, VPoint);
        }
 
        //                ChartData->ClearCacheInUseFlags();
        //                unsigned long hash1 = m_pQuilt->GetXStackHash();
 
        //                wxStopWatch sw;
 
#ifdef __ANDROID__
        // This is an optimization for panning on touch screen systems.
        //  The quilt composition is deferred until the OnPaint() message gets
        //  finally removed and processed from the message queue.
        // Takes advantage of the fact that touch-screen pan gestures are
        // usually short in distance,
        //  so not requiring a full quilt rebuild until the pan gesture is
        //  complete.
        if ((last_vp.view_scale_ppm != scale_ppm) || !bwasValid) {
          //                   qDebug() << "Force compose";
          m_pQuilt->Compose(VPoint);
        } else {
          m_pQuilt->Invalidate();
        }
#else
        m_pQuilt->Compose(VPoint);
#endif
 
        //                printf("comp time %ld\n", sw.Time());
 
        //      If the extended chart stack has changed, invalidate any cached
        //      render bitmap
        //                if(m_pQuilt->GetXStackHash() != hash1) {
        //                    m_bm_cache_vp.Invalidate();
        //                    InvalidateGL();
        //                }
 
        ChartData->PurgeCacheUnusedCharts(0.7);
 
        if (b_refresh) Refresh(false);
 
        b_ret = true;
      }
    }
 
    VPoint.skew = 0.;  // Quilting supports 0 Skew
  } else if (!g_bopengl) {
    OcpnProjType projection = PROJECTION_UNKNOWN;
    if (m_singleChart)  // viewport projection must match chart projection
                        // without opengl
      projection = m_singleChart->GetChartProjectionType();
    if (projection == PROJECTION_UNKNOWN) projection = PROJECTION_MERCATOR;
    VPoint.SetProjectionType(projection);
  }
 
  //  Has the Viewport projection changed?  If so, invalidate the vp
  if (last_vp.m_projection_type != VPoint.m_projection_type) {
    m_cache_vp.Invalidate();
    InvalidateGL();
  }
 
  UpdateCanvasControlBar();  // Refresh the Piano
 
  VPoint.chart_scale = 1.0;  // fallback default value
 
  if (VPoint.GetBBox().GetValid()) {
    //      Update the viewpoint reference scale
    if (m_singleChart)
      VPoint.ref_scale = m_singleChart->GetNativeScale();
    else {
#ifdef __ANDROID__
      // This is an optimization for panning on touch screen systems.
      // See above.
      // Quilt might not be fully composed at this point, so for cm93
      // the reference scale may not be known.
      // In this case, do not update the VP ref_scale.
      if ((last_vp.view_scale_ppm != scale_ppm) || !bwasValid) {
        VPoint.ref_scale = m_pQuilt->GetRefNativeScale();
      }
#else
      VPoint.ref_scale = m_pQuilt->GetRefNativeScale();
#endif
    }
 
    //    Calculate the on-screen displayed actual scale
    //    by a simple traverse northward from the center point
    //    of roughly one eighth of the canvas height
    wxPoint2DDouble r, r1;  // Screen coordinates in physical pixels.
 
    double delta_check =
        (VPoint.pix_height / VPoint.view_scale_ppm) / (1852. * 60);
    delta_check /= 8.;
 
    double check_point = wxMin(89., VPoint.clat);
 
    while ((delta_check + check_point) > 90.) delta_check /= 2.;
 
    double rhumbDist;
    DistanceBearingMercator(check_point, VPoint.clon, check_point + delta_check,
                            VPoint.clon, 0, &rhumbDist);
 
    GetDoubleCanvasPointPix(check_point, VPoint.clon, &r1);
    GetDoubleCanvasPointPix(check_point + delta_check, VPoint.clon, &r);
    // Calculate the distance between r1 and r in physical pixels.
    double delta_p = sqrt(((r1.m_y - r.m_y) * (r1.m_y - r.m_y)) +
                          ((r1.m_x - r.m_x) * (r1.m_x - r.m_x)));
 
    m_true_scale_ppm = delta_p / (rhumbDist * 1852);
 
    //        A fall back in case of very high zoom-out, giving delta_y == 0
    //        which can probably only happen with vector charts
    if (0.0 == m_true_scale_ppm) m_true_scale_ppm = scale_ppm;
 
    //        Another fallback, for highly zoomed out charts
    //        This adjustment makes the displayed TrueScale correspond to the
    //        same algorithm used to calculate the chart zoom-out limit for
    //        ChartDummy.
    if (scale_ppm < 1e-4) m_true_scale_ppm = scale_ppm;
 
    if (m_true_scale_ppm)
      VPoint.chart_scale = m_canvas_scale_factor / (m_true_scale_ppm);
    else
      VPoint.chart_scale = 1.0;
 
    // Create a nice renderable string
    double round_factor = 1000.;
    if (VPoint.chart_scale <= 1000.)
      round_factor = 10.;
    else if (VPoint.chart_scale <= 10000.)
      round_factor = 100.;
    else if (VPoint.chart_scale <= 100000.)
      round_factor = 1000.;
 
    // Fixme: Workaround the wrongly calculated scale on Retina displays (#3117)
    double retina_coef = 1;
#ifdef ocpnUSE_GL
#ifdef __WXOSX__
    if (g_bopengl) {
      retina_coef = GetContentScaleFactor();
    }
#endif
#endif
 
    // The chart scale denominator (e.g., 50000 if the scale is 1:50000),
    // rounded to the nearest 10, 100 or 1000.
    //
    // @todo: on MacOS there is 2x ratio between VPoint.chart_scale and
    // true_scale_display. That does not make sense. The chart scale should be
    // the same as the true scale within the limits of the rounding factor.
    double true_scale_display =
        wxRound(VPoint.chart_scale / round_factor) * round_factor * retina_coef;
    wxString text;
 
    m_displayed_scale_factor = VPoint.ref_scale / VPoint.chart_scale;
 
    if (m_displayed_scale_factor > 10.0)
      text.Printf("%s %4.0f (%1.0fx)", _("Scale"), true_scale_display,
                  m_displayed_scale_factor);
    else if (m_displayed_scale_factor > 1.0)
      text.Printf("%s %4.0f (%1.1fx)", _("Scale"), true_scale_display,
                  m_displayed_scale_factor);
    else if (m_displayed_scale_factor > 0.1) {
      double sfr = wxRound(m_displayed_scale_factor * 10.) / 10.;
      text.Printf("%s %4.0f (%1.2fx)", _("Scale"), true_scale_display, sfr);
    } else if (m_displayed_scale_factor > 0.01) {
      double sfr = wxRound(m_displayed_scale_factor * 100.) / 100.;
      text.Printf("%s %4.0f (%1.2fx)", _("Scale"), true_scale_display, sfr);
    } else {
      text.Printf(
          "%s %4.0f (---)", _("Scale"),
          true_scale_display);  // Generally, no chart, so no chart scale factor
    }
 
    m_scaleValue = true_scale_display;
    m_scaleText = text;
    if (m_muiBar) m_muiBar->UpdateDynamicValues();
 
    if (m_bShowScaleInStatusBar && parent_frame->GetStatusBar() &&
        (parent_frame->GetStatusBar()->GetFieldsCount() > STAT_FIELD_SCALE)) {
      // Check to see if the text will fit in the StatusBar field...
      bool b_noshow = false;
      {
        int w = 0;
        int h;
        wxClientDC dc(parent_frame->GetStatusBar());
        if (dc.IsOk()) {
          wxFont *templateFont = FontMgr::Get().GetFont(_("StatusBar"), 0);
          dc.SetFont(*templateFont);
          dc.GetTextExtent(text, &w, &h);
 
          // If text is too long for the allocated field, try to reduce the text
          // string a bit.
          wxRect rect;
          parent_frame->GetStatusBar()->GetFieldRect(STAT_FIELD_SCALE, rect);
          if (w && w > rect.width) {
            text.Printf("%s (%1.1fx)", _("Scale"), m_displayed_scale_factor);
          }
 
          //  Test again...if too big still, then give it up.
          dc.GetTextExtent(text, &w, &h);
 
          if (w && w > rect.width) {
            b_noshow = true;
          }
        }
      }
 
      if (!b_noshow) parent_frame->SetStatusText(text, STAT_FIELD_SCALE);
    }
  }
 
  //  Maintain member vLat/vLon
  m_vLat = VPoint.clat;
  m_vLon = VPoint.clon;
 
  return b_ret;
}
 
//          Static Icon definitions for some symbols requiring
//          scaling/rotation/translation Very specific wxDC draw commands are
//          necessary to properly render these icons...See the code in
//          ShipDraw()
 
//      This icon was adapted and scaled from the S52 Presentation Library
//      version 3_03.
//     Symbol VECGND02
 
static int s_png_pred_icon[] = {-10, -10, -10, 10, 10, 10, 10, -10};
 
//      This ownship icon was adapted and scaled from the S52 Presentation
//      Library version 3_03 Symbol OWNSHP05
static int s_ownship_icon[] = {5,  -42, 11,  -28, 11, 42, -11, 42, -11, -28,
                               -5, -42, -11, 0,   11, 0,  0,   42, 0,   -42};
 
wxColour ChartCanvas::PredColor() {
  //  RAdjust predictor color change on LOW_ACCURACY ship state in interests of
  //  visibility.
  if (SHIP_NORMAL == m_ownship_state)
    return GetGlobalColor("URED");
 
  else if (SHIP_LOWACCURACY == m_ownship_state)
    return GetGlobalColor("YELO1");
 
  return GetGlobalColor("NODTA");
}
 
wxColour ChartCanvas::ShipColor() {
  //      Establish ship color
  //     It changes color based on GPS and Chart accuracy/availability
 
  if (SHIP_NORMAL != m_ownship_state) return GetGlobalColor("GREY1");
 
  if (SHIP_LOWACCURACY == m_ownship_state) return GetGlobalColor("YELO1");
 
  return GetGlobalColor("URED");  // default is OK
}
 
void ChartCanvas::ShipDrawLargeScale(ocpnDC &dc,
                                     wxPoint2DDouble lShipMidPoint) {
  dc.SetPen(wxPen(PredColor(), 2));
 
  if (SHIP_NORMAL == m_ownship_state)
    dc.SetBrush(wxBrush(ShipColor(), wxBRUSHSTYLE_TRANSPARENT));
  else
    dc.SetBrush(wxBrush(GetGlobalColor("YELO1")));
 
  dc.DrawEllipse(lShipMidPoint.m_x - 10, lShipMidPoint.m_y - 10, 20, 20);
  dc.DrawEllipse(lShipMidPoint.m_x - 6, lShipMidPoint.m_y - 6, 12, 12);
 
  dc.DrawLine(lShipMidPoint.m_x - 12, lShipMidPoint.m_y, lShipMidPoint.m_x + 12,
              lShipMidPoint.m_y);
  dc.DrawLine(lShipMidPoint.m_x, lShipMidPoint.m_y - 12, lShipMidPoint.m_x,
              lShipMidPoint.m_y + 12);
}
 
void ChartCanvas::ShipIndicatorsDraw(ocpnDC &dc, int img_height,
                                     wxPoint GPSOffsetPixels,
                                     wxPoint2DDouble lGPSPoint) {
  // if (m_animationActive) return;
  //  Develop a uniform length for course predictor line dash length, based on
  //  physical display size Use this reference length to size all other graphics
  //  elements
  float ref_dim = m_display_size_mm / 24;
  ref_dim = wxMin(ref_dim, 12);
  ref_dim = wxMax(ref_dim, 6);
 
  wxColour cPred;
  cPred.Set(g_cog_predictor_color);
  if (cPred == wxNullColour) cPred = PredColor();
 
  //  Establish some graphic element line widths dependent on the platform
  //  display resolution
  // double nominal_line_width_pix = wxMax(1.0,
  // floor(g_Platform->GetDisplayDPmm() / 2));             //0.5 mm nominal, but
  // not less than 1 pixel
  double nominal_line_width_pix = wxMax(
      1.0,
      floor(m_pix_per_mm / 2));  // 0.5 mm nominal, but not less than 1 pixel
 
  // If the calculated value is greater than the config file spec value, then
  // use it.
  if (nominal_line_width_pix > g_cog_predictor_width)
    g_cog_predictor_width = nominal_line_width_pix;
 
  //    Calculate ownship Position Predictor
  wxPoint lPredPoint, lHeadPoint;
 
  float pCog = std::isnan(gCog) ? 0 : gCog;
  float pSog = std::isnan(gSog) ? 0 : gSog;
 
  double pred_lat, pred_lon;
  ll_gc_ll(gLat, gLon, pCog, pSog * g_ownship_predictor_minutes / 60.,
           &pred_lat, &pred_lon);
  GetCanvasPointPix(pred_lat, pred_lon, &lPredPoint);
 
  // test to catch the case where COG/HDG line crosses the screen
  LLBBox box;
 
  //    Should we draw the Head vector?
  //    Compare the points lHeadPoint and lPredPoint
  //    If they differ by more than n pixels, and the head vector is valid, then
  //    render the head vector
 
  float ndelta_pix = 10.;
  double hdg_pred_lat, hdg_pred_lon;
  bool b_render_hdt = false;
  if (!std::isnan(gHdt)) {
    //    Calculate ownship Heading pointer as a predictor
    ll_gc_ll(gLat, gLon, gHdt, g_ownship_HDTpredictor_miles, &hdg_pred_lat,
             &hdg_pred_lon);
    GetCanvasPointPix(hdg_pred_lat, hdg_pred_lon, &lHeadPoint);
    float dist = sqrtf(powf((float)(lHeadPoint.x - lPredPoint.x), 2) +
                       powf((float)(lHeadPoint.y - lPredPoint.y), 2));
    if (dist > ndelta_pix /*&& !std::isnan(gSog)*/) {
      box.SetFromSegment(gLat, gLon, hdg_pred_lat, hdg_pred_lon);
      if (!GetVP().GetBBox().IntersectOut(box)) b_render_hdt = true;
    }
  }
 
  // draw course over ground if they are longer than the ship
  wxPoint lShipMidPoint;
  lShipMidPoint.x = lGPSPoint.m_x + GPSOffsetPixels.x;
  lShipMidPoint.y = lGPSPoint.m_y + GPSOffsetPixels.y;
  float lpp = sqrtf(powf((float)(lPredPoint.x - lShipMidPoint.x), 2) +
                    powf((float)(lPredPoint.y - lShipMidPoint.y), 2));
 
  if (lpp >= img_height / 2) {
    box.SetFromSegment(gLat, gLon, pred_lat, pred_lon);
    if (!GetVP().GetBBox().IntersectOut(box) && !std::isnan(gCog) &&
        !std::isnan(gSog)) {
      //      COG Predictor
      float dash_length = ref_dim;
      wxDash dash_long[2];
      dash_long[0] =
          (int)(floor(g_Platform->GetDisplayDPmm() * dash_length) /
                g_cog_predictor_width);   // Long dash , in mm <---------+
      dash_long[1] = dash_long[0] / 2.0;  // Short gap
 
      // On ultra-hi-res displays, do not allow the dashes to be greater than
      // 250, since it is defined as (char)
      if (dash_length > 250.) {
        dash_long[0] = 250. / g_cog_predictor_width;
        dash_long[1] = dash_long[0] / 2;
      }
 
      wxPen ppPen2(cPred, g_cog_predictor_width,
                   (wxPenStyle)g_cog_predictor_style);
      if (g_cog_predictor_style == (wxPenStyle)wxUSER_DASH)
        ppPen2.SetDashes(2, dash_long);
      dc.SetPen(ppPen2);
      dc.StrokeLine(
          lGPSPoint.m_x + GPSOffsetPixels.x, lGPSPoint.m_y + GPSOffsetPixels.y,
          lPredPoint.x + GPSOffsetPixels.x, lPredPoint.y + GPSOffsetPixels.y);
 
      if (g_cog_predictor_width > 1) {
        float line_width = g_cog_predictor_width / 3.;
 
        wxDash dash_long3[2];
        dash_long3[0] = g_cog_predictor_width / line_width * dash_long[0];
        dash_long3[1] = g_cog_predictor_width / line_width * dash_long[1];
 
        wxPen ppPen3(GetGlobalColor("UBLCK"), wxMax(1, line_width),
                     (wxPenStyle)g_cog_predictor_style);
        if (g_cog_predictor_style == (wxPenStyle)wxUSER_DASH)
          ppPen3.SetDashes(2, dash_long3);
        dc.SetPen(ppPen3);
        dc.StrokeLine(lGPSPoint.m_x + GPSOffsetPixels.x,
                      lGPSPoint.m_y + GPSOffsetPixels.y,
                      lPredPoint.x + GPSOffsetPixels.x,
                      lPredPoint.y + GPSOffsetPixels.y);
      }
 
      if (g_cog_predictor_endmarker) {
        // Prepare COG predictor endpoint icon
        double png_pred_icon_scale_factor = .4;
        if (g_ShipScaleFactorExp > 1.0)
          png_pred_icon_scale_factor *= (log(g_ShipScaleFactorExp) + 1.0) * 1.1;
        if (g_scaler) png_pred_icon_scale_factor *= 1.0 / g_scaler;
 
        wxPoint icon[4];
 
        float cog_rad = atan2f((float)(lPredPoint.y - lShipMidPoint.y),
                               (float)(lPredPoint.x - lShipMidPoint.x));
        cog_rad += (float)PI;
 
        for (int i = 0; i < 4; i++) {
          int j = i * 2;
          double pxa = (double)(s_png_pred_icon[j]);
          double pya = (double)(s_png_pred_icon[j + 1]);
 
          pya *= png_pred_icon_scale_factor;
          pxa *= png_pred_icon_scale_factor;
 
          double px = (pxa * sin(cog_rad)) + (pya * cos(cog_rad));
          double py = (pya * sin(cog_rad)) - (pxa * cos(cog_rad));
 
          icon[i].x = (int)wxRound(px) + lPredPoint.x + GPSOffsetPixels.x;
          icon[i].y = (int)wxRound(py) + lPredPoint.y + GPSOffsetPixels.y;
        }
 
        // Render COG endpoint icon
        wxPen ppPen1(GetGlobalColor("UBLCK"), g_cog_predictor_width / 2,
                     wxPENSTYLE_SOLID);
        dc.SetPen(ppPen1);
        dc.SetBrush(wxBrush(cPred));
 
        dc.StrokePolygon(4, icon);
      }
    }
  }
 
  //      HDT Predictor
  if (b_render_hdt) {
    float hdt_dash_length = ref_dim * 0.4;
 
    cPred.Set(g_ownship_HDTpredictor_color);
    if (cPred == wxNullColour) cPred = PredColor();
    float hdt_width =
        (g_ownship_HDTpredictor_width > 0 ? g_ownship_HDTpredictor_width
                                          : g_cog_predictor_width * 0.8);
    wxDash dash_short[2];
    dash_short[0] =
        (int)(floor(g_Platform->GetDisplayDPmm() * hdt_dash_length) /
              hdt_width);  // Short dash , in mm <---------+
    dash_short[1] =
        (int)(floor(g_Platform->GetDisplayDPmm() * hdt_dash_length * 0.9) /
              hdt_width);  // Short gap            |
 
    wxPen ppPen2(cPred, hdt_width, (wxPenStyle)g_ownship_HDTpredictor_style);
    if (g_ownship_HDTpredictor_style == (wxPenStyle)wxUSER_DASH)
      ppPen2.SetDashes(2, dash_short);
 
    dc.SetPen(ppPen2);
    dc.StrokeLine(
        lGPSPoint.m_x + GPSOffsetPixels.x, lGPSPoint.m_y + GPSOffsetPixels.y,
        lHeadPoint.x + GPSOffsetPixels.x, lHeadPoint.y + GPSOffsetPixels.y);
 
    wxPen ppPen1(cPred, g_cog_predictor_width / 3, wxPENSTYLE_SOLID);
    dc.SetPen(ppPen1);
    dc.SetBrush(wxBrush(GetGlobalColor("GREY2")));
 
    if (g_ownship_HDTpredictor_endmarker) {
      double nominal_circle_size_pixels = wxMax(
          4.0, floor(m_pix_per_mm * (ref_dim / 5.0)));  // not less than 4 pixel
 
      // Scale the circle to ChartScaleFactor, slightly softened....
      if (g_ShipScaleFactorExp > 1.0)
        nominal_circle_size_pixels *= (log(g_ShipScaleFactorExp) + 1.0) * 1.1;
 
      dc.StrokeCircle(lHeadPoint.x + GPSOffsetPixels.x,
                      lHeadPoint.y + GPSOffsetPixels.y,
                      nominal_circle_size_pixels / 2);
    }
  }
 
  // Draw radar rings if activated
  if (g_bNavAidRadarRingsShown && g_iNavAidRadarRingsNumberVisible > 0) {
    double factor = 1.00;
    if (g_pNavAidRadarRingsStepUnits == 1)  // kilometers
      factor = 1 / 1.852;
    else if (g_pNavAidRadarRingsStepUnits == 2) {  // minutes (time)
      if (std::isnan(gSog))
        factor = 0.0;
      else
        factor = gSog / 60;
    }
    factor *= g_fNavAidRadarRingsStep;
 
    double tlat, tlon;
    wxPoint r;
    ll_gc_ll(gLat, gLon, 0, factor, &tlat, &tlon);
    GetCanvasPointPix(tlat, tlon, &r);
 
    double lpp = sqrt(pow((double)(lGPSPoint.m_x - r.x), 2) +
                      pow((double)(lGPSPoint.m_y - r.y), 2));
    int pix_radius = (int)lpp;
 
    wxColor rangeringcolour = GetDimColor(g_colourOwnshipRangeRingsColour);
 
    wxPen ppPen1(rangeringcolour, g_cog_predictor_width);
 
    dc.SetPen(ppPen1);
    dc.SetBrush(wxBrush(rangeringcolour, wxBRUSHSTYLE_TRANSPARENT));
 
    for (int i = 1; i <= g_iNavAidRadarRingsNumberVisible; i++)
      dc.StrokeCircle(lGPSPoint.m_x, lGPSPoint.m_y, i * pix_radius);
  }
}
 
void ChartCanvas::ComputeShipScaleFactor(
    float icon_hdt, int ownShipWidth, int ownShipLength,
    wxPoint2DDouble &lShipMidPoint, wxPoint &GPSOffsetPixels,
    wxPoint2DDouble lGPSPoint, float &scale_factor_x, float &scale_factor_y) {
  float screenResolution = m_pix_per_mm;
 
  //  Calculate the true ship length in exact pixels
  double ship_bow_lat, ship_bow_lon;
  ll_gc_ll(gLat, gLon, icon_hdt, g_n_ownship_length_meters / 1852.,
           &ship_bow_lat, &ship_bow_lon);
  wxPoint lShipBowPoint;
  wxPoint2DDouble b_point =
      GetVP().GetDoublePixFromLL(ship_bow_lat, ship_bow_lon);
  wxPoint2DDouble a_point = GetVP().GetDoublePixFromLL(gLat, gLon);
 
  float shipLength_px = sqrtf(powf((float)(b_point.m_x - a_point.m_x), 2) +
                              powf((float)(b_point.m_y - a_point.m_y), 2));
 
  //  And in mm
  float shipLength_mm = shipLength_px / screenResolution;
 
  //  Set minimum ownship drawing size
  float ownship_min_mm = g_n_ownship_min_mm;
  ownship_min_mm = wxMax(ownship_min_mm, 1.0);
 
  //  Calculate Nautical Miles distance from midships to gps antenna
  float hdt_ant = icon_hdt + 180.;
  float dy = (g_n_ownship_length_meters / 2 - g_n_gps_antenna_offset_y) / 1852.;
  float dx = g_n_gps_antenna_offset_x / 1852.;
  if (g_n_gps_antenna_offset_y > g_n_ownship_length_meters / 2)  // reverse?
  {
    hdt_ant = icon_hdt;
    dy = -dy;
  }
 
  //  If the drawn ship size is going to be clamped, adjust the gps antenna
  //  offsets
  if (shipLength_mm < ownship_min_mm) {
    dy /= shipLength_mm / ownship_min_mm;
    dx /= shipLength_mm / ownship_min_mm;
  }
 
  double ship_mid_lat, ship_mid_lon, ship_mid_lat1, ship_mid_lon1;
 
  ll_gc_ll(gLat, gLon, hdt_ant, dy, &ship_mid_lat, &ship_mid_lon);
  ll_gc_ll(ship_mid_lat, ship_mid_lon, icon_hdt - 90., dx, &ship_mid_lat1,
           &ship_mid_lon1);
 
  GetDoubleCanvasPointPixVP(GetVP(), ship_mid_lat1, ship_mid_lon1,
                            &lShipMidPoint);
 
  GPSOffsetPixels.x = lShipMidPoint.m_x - lGPSPoint.m_x;
  GPSOffsetPixels.y = lShipMidPoint.m_y - lGPSPoint.m_y;
 
  float scale_factor = shipLength_px / ownShipLength;
 
  //  Calculate a scale factor that would produce a reasonably sized icon
  float scale_factor_min = ownship_min_mm / (ownShipLength / screenResolution);
 
  //  And choose the correct one
  scale_factor = wxMax(scale_factor, scale_factor_min);
 
  scale_factor_y = scale_factor;
  scale_factor_x = scale_factor_y * ((float)ownShipLength / ownShipWidth) /
                   ((float)g_n_ownship_length_meters / g_n_ownship_beam_meters);
}
 
void ChartCanvas::ShipDraw(ocpnDC &dc) {
  if (!GetVP().IsValid()) return;
 
  wxPoint GPSOffsetPixels(0, 0);
  wxPoint2DDouble lGPSPoint, lShipMidPoint;
 
  //  COG/SOG may be undefined in NMEA data stream
  float pCog = std::isnan(gCog) ? 0 : gCog;
  float pSog = std::isnan(gSog) ? 0 : gSog;
 
  GetDoubleCanvasPointPixVP(GetVP(), gLat, gLon, &lGPSPoint);
 
  lShipMidPoint = lGPSPoint;
 
  //  Draw the icon rotated to the COG
  //  or to the Hdt if available
  float icon_hdt = pCog;
  if (!std::isnan(gHdt)) icon_hdt = gHdt;
 
  //  COG may be undefined in NMEA data stream
  if (std::isnan(icon_hdt)) icon_hdt = 0.0;
 
  //    Calculate the ownship drawing angle icon_rad using an assumed 10 minute
  //    predictor
  double osd_head_lat, osd_head_lon;
  wxPoint osd_head_point;
 
  ll_gc_ll(gLat, gLon, icon_hdt, pSog * 10. / 60., &osd_head_lat,
           &osd_head_lon);
 
  GetCanvasPointPix(osd_head_lat, osd_head_lon, &osd_head_point);
 
  float icon_rad = atan2f((float)(osd_head_point.y - lShipMidPoint.m_y),
                          (float)(osd_head_point.x - lShipMidPoint.m_x));
  icon_rad += (float)PI;
 
  if (pSog < 0.2) icon_rad = ((icon_hdt + 90.) * PI / 180) + GetVP().rotation;
 
  //    Another draw test ,based on pixels, assuming the ship icon is a fixed
  //    nominal size and is just barely outside the viewport        ....
  BoundingBox bb_screen(0, 0, GetVP().pix_width, GetVP().pix_height);
 
  // TODO: fix to include actual size of boat that will be rendered
  int img_height = 0;
  if (bb_screen.PointInBox(lShipMidPoint, 20)) {
    if (GetVP().chart_scale >
        300000)  // According to S52, this should be 50,000
    {
      ShipDrawLargeScale(dc, lShipMidPoint);
      img_height = 20;
    } else {
      wxImage pos_image;
 
      //      Substitute user ownship image if found
      if (m_pos_image_user)
        pos_image = m_pos_image_user->Copy();
      else if (SHIP_NORMAL == m_ownship_state)
        pos_image = m_pos_image_red->Copy();
      if (SHIP_LOWACCURACY == m_ownship_state)
        pos_image = m_pos_image_yellow->Copy();
      else if (SHIP_NORMAL != m_ownship_state)
        pos_image = m_pos_image_grey->Copy();
 
      //      Substitute user ownship image if found
      if (m_pos_image_user) {
        pos_image = m_pos_image_user->Copy();
 
        if (SHIP_LOWACCURACY == m_ownship_state)
          pos_image = m_pos_image_user_yellow->Copy();
        else if (SHIP_NORMAL != m_ownship_state)
          pos_image = m_pos_image_user_grey->Copy();
      }
 
      img_height = pos_image.GetHeight();
 
      if (g_n_ownship_beam_meters > 0.0 && g_n_ownship_length_meters > 0.0 &&
          g_OwnShipIconType > 0)  // use large ship
      {
        int ownShipWidth = 22;  // Default values from s_ownship_icon
        int ownShipLength = 84;
        if (g_OwnShipIconType == 1) {
          ownShipWidth = pos_image.GetWidth();
          ownShipLength = pos_image.GetHeight();
        }
 
        float scale_factor_x, scale_factor_y;
        ComputeShipScaleFactor(icon_hdt, ownShipWidth, ownShipLength,
                               lShipMidPoint, GPSOffsetPixels, lGPSPoint,
                               scale_factor_x, scale_factor_y);
 
        if (g_OwnShipIconType == 1) {  // Scaled bitmap
          pos_image.Rescale(ownShipWidth * scale_factor_x,
                            ownShipLength * scale_factor_y,
                            wxIMAGE_QUALITY_HIGH);
          wxPoint rot_ctr(pos_image.GetWidth() / 2, pos_image.GetHeight() / 2);
          wxImage rot_image =
              pos_image.Rotate(-(icon_rad - (PI / 2.)), rot_ctr, true);
 
          // Simple sharpening algorithm.....
          for (int ip = 0; ip < rot_image.GetWidth(); ip++)
            for (int jp = 0; jp < rot_image.GetHeight(); jp++)
              if (rot_image.GetAlpha(ip, jp) > 64)
                rot_image.SetAlpha(ip, jp, 255);
 
          wxBitmap os_bm(rot_image);
 
          int w = os_bm.GetWidth();
          int h = os_bm.GetHeight();
          img_height = h;
 
          dc.DrawBitmap(os_bm, lShipMidPoint.m_x - w / 2,
                        lShipMidPoint.m_y - h / 2, true);
 
          // Maintain dirty box,, missing in __WXMSW__ library
          dc.CalcBoundingBox(lShipMidPoint.m_x - w / 2,
                             lShipMidPoint.m_y - h / 2);
          dc.CalcBoundingBox(lShipMidPoint.m_x - w / 2 + w,
                             lShipMidPoint.m_y - h / 2 + h);
        }
 
        else if (g_OwnShipIconType == 2) {  // Scaled Vector
          wxPoint ownship_icon[10];
 
          for (int i = 0; i < 10; i++) {
            int j = i * 2;
            float pxa = (float)(s_ownship_icon[j]);
            float pya = (float)(s_ownship_icon[j + 1]);
            pya *= scale_factor_y;
            pxa *= scale_factor_x;
 
            float px = (pxa * sinf(icon_rad)) + (pya * cosf(icon_rad));
            float py = (pya * sinf(icon_rad)) - (pxa * cosf(icon_rad));
 
            ownship_icon[i].x = (int)(px) + lShipMidPoint.m_x;
            ownship_icon[i].y = (int)(py) + lShipMidPoint.m_y;
          }
 
          wxPen ppPen1(GetGlobalColor("UBLCK"), 1, wxPENSTYLE_SOLID);
          dc.SetPen(ppPen1);
          dc.SetBrush(wxBrush(ShipColor()));
 
          dc.StrokePolygon(6, &ownship_icon[0], 0, 0);
 
          //     draw reference point (midships) cross
          dc.StrokeLine(ownship_icon[6].x, ownship_icon[6].y, ownship_icon[7].x,
                        ownship_icon[7].y);
          dc.StrokeLine(ownship_icon[8].x, ownship_icon[8].y, ownship_icon[9].x,
                        ownship_icon[9].y);
        }
 
        img_height = ownShipLength * scale_factor_y;
 
        //      Reference point, where the GPS antenna is
        int circle_rad = 3;
        if (m_pos_image_user) circle_rad = 1;
 
        dc.SetPen(wxPen(GetGlobalColor("UBLCK"), 1));
        dc.SetBrush(wxBrush(GetGlobalColor("UIBCK")));
        dc.StrokeCircle(lGPSPoint.m_x, lGPSPoint.m_y, circle_rad);
      } else {  // Fixed bitmap icon.
        /* non opengl, or suboptimal opengl via ocpndc: */
        wxPoint rot_ctr(pos_image.GetWidth() / 2, pos_image.GetHeight() / 2);
        wxImage rot_image =
            pos_image.Rotate(-(icon_rad - (PI / 2.)), rot_ctr, true);
 
        // Simple sharpening algorithm.....
        for (int ip = 0; ip < rot_image.GetWidth(); ip++)
          for (int jp = 0; jp < rot_image.GetHeight(); jp++)
            if (rot_image.GetAlpha(ip, jp) > 64)
              rot_image.SetAlpha(ip, jp, 255);
 
        wxBitmap os_bm(rot_image);
 
        if (g_ShipScaleFactorExp > 1) {
          wxImage scaled_image = os_bm.ConvertToImage();
          double factor = (log(g_ShipScaleFactorExp) + 1.0) *
                          1.0;  // soften the scale factor a bit
          os_bm = wxBitmap(scaled_image.Scale(scaled_image.GetWidth() * factor,
                                              scaled_image.GetHeight() * factor,
                                              wxIMAGE_QUALITY_HIGH));
        }
        int w = os_bm.GetWidth();
        int h = os_bm.GetHeight();
        img_height = h;
 
        dc.DrawBitmap(os_bm, lShipMidPoint.m_x - w / 2,
                      lShipMidPoint.m_y - h / 2, true);
 
        //      Reference point, where the GPS antenna is
        int circle_rad = 3;
        if (m_pos_image_user) circle_rad = 1;
 
        dc.SetPen(wxPen(GetGlobalColor("UBLCK"), 1));
        dc.SetBrush(wxBrush(GetGlobalColor("UIBCK")));
        dc.StrokeCircle(lShipMidPoint.m_x, lShipMidPoint.m_y, circle_rad);
 
        // Maintain dirty box,, missing in __WXMSW__ library
        dc.CalcBoundingBox(lShipMidPoint.m_x - w / 2,
                           lShipMidPoint.m_y - h / 2);
        dc.CalcBoundingBox(lShipMidPoint.m_x - w / 2 + w,
                           lShipMidPoint.m_y - h / 2 + h);
      }
    }  // ownship draw
  }
 
  ShipIndicatorsDraw(dc, img_height, GPSOffsetPixels, lGPSPoint);
}
 
/* @ChartCanvas::CalcGridSpacing
 **
 ** Calculate the major and minor spacing between the lat/lon grid
 **
 ** @param [r] WindowDegrees [float] displayed number of lat or lan in the
 *window
 ** @param [w] MajorSpacing [float &] Major distance between grid lines
 ** @param [w] MinorSpacing [float &] Minor distance between grid lines
 ** @return [void]
 */
void CalcGridSpacing(float view_scale_ppm, float &MajorSpacing,
                     float &MinorSpacing) {
  // table for calculating the distance between the grids
  // [0] view_scale ppm
  // [1] spacing between major grid lines in degrees
  // [2] spacing between minor grid lines in degrees
  const float lltab[][3] = {{0.0f, 90.0f, 30.0f},
                            {.000001f, 45.0f, 15.0f},
                            {.0002f, 30.0f, 10.0f},
                            {.0003f, 10.0f, 2.0f},
                            {.0008f, 5.0f, 1.0f},
                            {.001f, 2.0f, 30.0f / 60.0f},
                            {.003f, 1.0f, 20.0f / 60.0f},
                            {.006f, 0.5f, 10.0f / 60.0f},
                            {.03f, 15.0f / 60.0f, 5.0f / 60.0f},
                            {.01f, 10.0f / 60.0f, 2.0f / 60.0f},
                            {.06f, 5.0f / 60.0f, 1.0f / 60.0f},
                            {.1f, 2.0f / 60.0f, 1.0f / 60.0f},
                            {.4f, 1.0f / 60.0f, 0.5f / 60.0f},
                            {.6f, 0.5f / 60.0f, 0.1f / 60.0f},
                            {1.0f, 0.2f / 60.0f, 0.1f / 60.0f},
                            {1e10f, 0.1f / 60.0f, 0.05f / 60.0f}};
 
  unsigned int tabi;
  for (tabi = 0; tabi < ((sizeof lltab) / (sizeof *lltab)) - 1; tabi++)
    if (view_scale_ppm < lltab[tabi][0]) break;
  MajorSpacing = lltab[tabi][1];  // major latitude distance
  MinorSpacing = lltab[tabi][2];  // minor latitude distance
  return;
}
/* @ChartCanvas::CalcGridText *************************************
 **
 ** Calculates text to display at the major grid lines
 **
 ** @param [r] latlon [float] latitude or longitude of grid line
 ** @param [r] spacing [float] distance between two major grid lines
 ** @param [r] bPostfix [bool] true for latitudes, false for longitudes
 **
 ** @return
 */
 
wxString CalcGridText(float latlon, float spacing, bool bPostfix) {
  int deg = (int)fabs(latlon);                    // degrees
  float min = fabs((fabs(latlon) - deg) * 60.0);  // Minutes
  char postfix;
 
  // calculate postfix letter (NSEW)
  if (latlon > 0.0) {
    if (bPostfix) {
      postfix = 'N';
    } else {
      postfix = 'E';
    }
  } else if (latlon < 0.0) {
    if (bPostfix) {
      postfix = 'S';
    } else {
      postfix = 'W';
    }
  } else {
    postfix = ' ';  // no postfix for equator and greenwich
  }
  // calculate text, display minutes only if spacing is smaller than one degree
 
  wxString ret;
  if (spacing >= 1.0) {
    ret.Printf("%3d%c %c", deg, 0x00b0, postfix);
  } else if (spacing >= (1.0 / 60.0)) {
    ret.Printf("%3d%c%02.0f %c", deg, 0x00b0, min, postfix);
  } else {
    ret.Printf("%3d%c%02.2f %c", deg, 0x00b0, min, postfix);
  }
 
  return ret;
}
 
/* @ChartCanvas::GridDraw *****************************************
 **
 ** Draws major and minor Lat/Lon Grid on the chart
 ** - distance between Grid-lm ines are calculated automatic
 ** - major grid lines will be across the whole chart window
 ** - minor grid lines will be 10 pixel at each edge of the chart window.
 **
 ** @param [w] dc [wxDC&] the wx drawing context
 **
 ** @return [void]
 ************************************************************************/
void ChartCanvas::GridDraw(ocpnDC &dc) {
  if (!(m_bDisplayGrid && (fabs(GetVP().rotation) < 1e-5))) return;
 
  double nlat, elon, slat, wlon;
  float lat, lon;
  float dlon;
  float gridlatMajor, gridlatMinor, gridlonMajor, gridlonMinor;
  wxCoord w, h;
  wxPen GridPen(GetGlobalColor("SNDG1"), 1, wxPENSTYLE_SOLID);
  dc.SetPen(GridPen);
  if (!m_pgridFont) SetupGridFont();
  dc.SetFont(*m_pgridFont);
  dc.SetTextForeground(GetGlobalColor("SNDG1"));
 
  w = m_canvas_width;
  h = m_canvas_height;
 
  GetCanvasPixPoint(0, 0, nlat,
                    wlon);  // get lat/lon of upper left point of the window
  GetCanvasPixPoint(w, h, slat,
                    elon);  // get lat/lon of lower right point of the window
  dlon =
      elon -
      wlon;  // calculate how many degrees of longitude are shown in the window
  if (dlon < 0.0)  // concider datum border at 180 degrees longitude
  {
    dlon = dlon + 360.0;
  }
  // calculate distance between latitude grid lines
  CalcGridSpacing(GetVP().view_scale_ppm, gridlatMajor, gridlatMinor);
 
  // calculate position of first major latitude grid line
  lat = ceil(slat / gridlatMajor) * gridlatMajor;
 
  // Draw Major latitude grid lines and text
  while (lat < nlat) {
    wxPoint r;
    wxString st =
        CalcGridText(lat, gridlatMajor, true);  // get text for grid line
    GetCanvasPointPix(lat, (elon + wlon) / 2, &r);
    dc.DrawLine(0, r.y, w, r.y, false);  // draw grid line
    dc.DrawText(st, 0, r.y);             // draw text
    lat = lat + gridlatMajor;
 
    if (fabs(lat - wxRound(lat)) < 1e-5) lat = wxRound(lat);
  }
 
  // calculate position of first minor latitude grid line
  lat = ceil(slat / gridlatMinor) * gridlatMinor;
 
  // Draw minor latitude grid lines
  while (lat < nlat) {
    wxPoint r;
    GetCanvasPointPix(lat, (elon + wlon) / 2, &r);
    dc.DrawLine(0, r.y, 10, r.y, false);
    dc.DrawLine(w - 10, r.y, w, r.y, false);
    lat = lat + gridlatMinor;
  }
 
  // calculate distance between grid lines
  CalcGridSpacing(GetVP().view_scale_ppm, gridlonMajor, gridlonMinor);
 
  // calculate position of first major latitude grid line
  lon = ceil(wlon / gridlonMajor) * gridlonMajor;
 
  // draw major longitude grid lines
  for (int i = 0, itermax = (int)(dlon / gridlonMajor); i <= itermax; i++) {
    wxPoint r;
    wxString st = CalcGridText(lon, gridlonMajor, false);
    GetCanvasPointPix((nlat + slat) / 2, lon, &r);
    dc.DrawLine(r.x, 0, r.x, h, false);
    dc.DrawText(st, r.x, 0);
    lon = lon + gridlonMajor;
    if (lon > 180.0) {
      lon = lon - 360.0;
    }
 
    if (fabs(lon - wxRound(lon)) < 1e-5) lon = wxRound(lon);
  }
 
  // calculate position of first minor longitude grid line
  lon = ceil(wlon / gridlonMinor) * gridlonMinor;
  // draw minor longitude grid lines
  for (int i = 0, itermax = (int)(dlon / gridlonMinor); i <= itermax; i++) {
    wxPoint r;
    GetCanvasPointPix((nlat + slat) / 2, lon, &r);
    dc.DrawLine(r.x, 0, r.x, 10, false);
    dc.DrawLine(r.x, h - 10, r.x, h, false);
    lon = lon + gridlonMinor;
    if (lon > 180.0) {
      lon = lon - 360.0;
    }
  }
}
 
void ChartCanvas::ScaleBarDraw(ocpnDC &dc) {
  if (0 ) {
    double blat, blon, tlat, tlon;
    wxPoint r;
 
    int x_origin = m_bDisplayGrid ? 60 : 20;
    int y_origin = m_canvas_height - 50;
 
    float dist;
    int count;
    wxPen pen1, pen2;
 
    if (GetVP().chart_scale > 80000)  // Draw 10 mile scale as SCALEB11
    {
      dist = 10.0;
      count = 5;
      pen1 = wxPen(GetGlobalColor("SNDG2"), 3, wxPENSTYLE_SOLID);
      pen2 = wxPen(GetGlobalColor("SNDG1"), 3, wxPENSTYLE_SOLID);
    } else  // Draw 1 mile scale as SCALEB10
    {
      dist = 1.0;
      count = 10;
      pen1 = wxPen(GetGlobalColor("SCLBR"), 3, wxPENSTYLE_SOLID);
      pen2 = wxPen(GetGlobalColor("CHGRD"), 3, wxPENSTYLE_SOLID);
    }
 
    GetCanvasPixPoint(x_origin, y_origin, blat, blon);
    double rotation = -VPoint.rotation;
 
    ll_gc_ll(blat, blon, rotation * 180 / PI, dist, &tlat, &tlon);
    GetCanvasPointPix(tlat, tlon, &r);
    int l1 = (y_origin - r.y) / count;
 
    for (int i = 0; i < count; i++) {
      int y = l1 * i;
      if (i & 1)
        dc.SetPen(pen1);
      else
        dc.SetPen(pen2);
 
      dc.DrawLine(x_origin, y_origin - y, x_origin, y_origin - (y + l1));
    }
  } else {
    double blat, blon, tlat, tlon;
 
    int x_origin = 5.0 * GetPixPerMM();
    int chartbar_height = GetChartbarHeight();
    //         ocpnStyle::Style* style = g_StyleManager->GetCurrentStyle();
    //         if (style->chartStatusWindowTransparent)
    //             chartbar_height = 0;
    int y_origin = m_canvas_height - chartbar_height - 5;
#ifdef __WXOSX__
    if (!g_bopengl)
      y_origin =
          m_canvas_height / GetContentScaleFactor() - chartbar_height - 5;
#endif
 
    GetCanvasPixPoint(x_origin, y_origin, blat, blon);
    GetCanvasPixPoint(x_origin + m_canvas_width, y_origin, tlat, tlon);
 
    double d;
    ll_gc_ll_reverse(blat, blon, tlat, tlon, 0, &d);
    d /= 2;
 
    int unit = g_iDistanceFormat;
    if (d < .5 &&
        (unit == DISTANCE_KM || unit == DISTANCE_MI || unit == DISTANCE_NMI))
      unit = (unit == DISTANCE_MI) ? DISTANCE_FT : DISTANCE_M;
 
    // nice number
    float dist = toUsrDistance(d, unit), logdist = log(dist) / log(10.F);
    float places = floor(logdist), rem = logdist - places;
    dist = pow(10, places);
 
    if (rem < .2)
      dist /= 5;
    else if (rem < .5)
      dist /= 2;
 
    wxString s = wxString::Format("%g ", dist) + getUsrDistanceUnit(unit);
    wxPen pen1 = wxPen(GetGlobalColor("UBLCK"), 3, wxPENSTYLE_SOLID);
    double rotation = -VPoint.rotation;
 
    ll_gc_ll(blat, blon, rotation * 180 / PI + 90, fromUsrDistance(dist, unit),
             &tlat, &tlon);
    wxPoint r;
    GetCanvasPointPix(tlat, tlon, &r);
    int l1 = r.x - x_origin;
 
    m_scaleBarRect = wxRect(x_origin, y_origin - 12, l1,
                            12);  // Store this for later reference
 
    dc.SetPen(pen1);
 
    dc.DrawLine(x_origin, y_origin, x_origin, y_origin - 12);
    dc.DrawLine(x_origin, y_origin, x_origin + l1, y_origin);
    dc.DrawLine(x_origin + l1, y_origin, x_origin + l1, y_origin - 12);
 
    if (!m_pgridFont) SetupGridFont();
    dc.SetFont(*m_pgridFont);
    dc.SetTextForeground(GetGlobalColor("UBLCK"));
    int w, h;
    dc.GetTextExtent(s, &w, &h);
    double dpi_factor = 1. / g_BasePlatform->GetDisplayDIPMult(this);
    if (g_bopengl) {
      w /= dpi_factor;
      h /= dpi_factor;
    }
    dc.DrawText(s, x_origin + l1 / 2 - w / 2, y_origin - h - 1);
  }
}
 
void ChartCanvas::JaggyCircle(ocpnDC &dc, wxPen pen, int x, int y, int radius) {
  //    Constants?
  double da_min = 2.;
  double da_max = 6.;
  double ra_min = 0.;
  double ra_max = 40.;
 
  wxPen pen_save = dc.GetPen();
 
  wxDateTime now = wxDateTime::Now();
 
  dc.SetPen(pen);
 
  int x0, y0, x1, y1;
 
  x0 = x1 = x + radius;  // Start point
  y0 = y1 = y;
  double angle = 0.;
  int i = 0;
 
  while (angle < 360.) {
    double da = da_min + (((double)rand() / RAND_MAX) * (da_max - da_min));
    angle += da;
 
    if (angle > 360.) angle = 360.;
 
    double ra = ra_min + (((double)rand() / RAND_MAX) * (ra_max - ra_min));
 
    double r;
    if (i & 1)
      r = radius + ra;
    else
      r = radius - ra;
 
    x1 = (int)(x + cos(angle * PI / 180.) * r);
    y1 = (int)(y + sin(angle * PI / 180.) * r);
 
    dc.DrawLine(x0, y0, x1, y1);
 
    x0 = x1;
    y0 = y1;
 
    i++;
  }
 
  dc.DrawLine(x + radius, y, x1, y1);  // closure
 
  dc.SetPen(pen_save);
}
 
static bool bAnchorSoundPlaying = false;
 
static void onAnchorSoundFinished(void *ptr) {
  o_sound::g_anchorwatch_sound->UnLoad();
  bAnchorSoundPlaying = false;
}
 
void ChartCanvas::AlertDraw(ocpnDC &dc) {
  using namespace o_sound;
  // Visual and audio alert for anchorwatch goes here
  bool play_sound = false;
  if (pAnchorWatchPoint1 && AnchorAlertOn1) {
    if (AnchorAlertOn1) {
      wxPoint TargetPoint;
      GetCanvasPointPix(pAnchorWatchPoint1->m_lat, pAnchorWatchPoint1->m_lon,
                        &TargetPoint);
      JaggyCircle(dc, wxPen(GetGlobalColor("URED"), 2), TargetPoint.x,
                  TargetPoint.y, 100);
      play_sound = true;
    }
  } else
    AnchorAlertOn1 = false;
 
  if (pAnchorWatchPoint2 && AnchorAlertOn2) {
    if (AnchorAlertOn2) {
      wxPoint TargetPoint;
      GetCanvasPointPix(pAnchorWatchPoint2->m_lat, pAnchorWatchPoint2->m_lon,
                        &TargetPoint);
      JaggyCircle(dc, wxPen(GetGlobalColor("URED"), 2), TargetPoint.x,
                  TargetPoint.y, 100);
      play_sound = true;
    }
  } else
    AnchorAlertOn2 = false;
 
  if (play_sound) {
    if (!bAnchorSoundPlaying) {
      auto cmd_sound = dynamic_cast<SystemCmdSound *>(g_anchorwatch_sound);
      if (cmd_sound) cmd_sound->SetCmd(g_CmdSoundString.mb_str(wxConvUTF8));
      g_anchorwatch_sound->Load(g_anchorwatch_sound_file);
      if (g_anchorwatch_sound->IsOk()) {
        bAnchorSoundPlaying = true;
        g_anchorwatch_sound->SetFinishedCallback(onAnchorSoundFinished, NULL);
        g_anchorwatch_sound->Play();
      }
    }
  }
}
 
void ChartCanvas::UpdateShips() {
  //  Get the rectangle in the current dc which bounds the "ownship" symbol
 
  wxClientDC dc(this);
  if (!dc.IsOk()) return;
 
  wxBitmap test_bitmap(dc.GetSize().x, dc.GetSize().y);
  if (!test_bitmap.IsOk()) return;
 
  wxMemoryDC temp_dc(test_bitmap);
 
  temp_dc.ResetBoundingBox();
  temp_dc.DestroyClippingRegion();
  temp_dc.SetClippingRegion(0, 0, dc.GetSize().x, dc.GetSize().y);
 
  // Draw the ownship on the temp_dc
  ocpnDC ocpndc = ocpnDC(temp_dc);
  ShipDraw(ocpndc);
 
  if (g_pActiveTrack && g_pActiveTrack->IsRunning()) {
    TrackPoint *p = g_pActiveTrack->GetLastPoint();
    if (p) {
      wxPoint px;
      GetCanvasPointPix(p->m_lat, p->m_lon, &px);
      ocpndc.CalcBoundingBox(px.x, px.y);
    }
  }
 
  ship_draw_rect =
      wxRect(temp_dc.MinX(), temp_dc.MinY(), temp_dc.MaxX() - temp_dc.MinX(),
             temp_dc.MaxY() - temp_dc.MinY());
 
  wxRect own_ship_update_rect = ship_draw_rect;
 
  if (!own_ship_update_rect.IsEmpty()) {
    //  The required invalidate rectangle is the union of the last drawn
    //  rectangle and this drawn rectangle
    own_ship_update_rect.Union(ship_draw_last_rect);
    own_ship_update_rect.Inflate(2);
  }
 
  if (!own_ship_update_rect.IsEmpty()) RefreshRect(own_ship_update_rect, false);
 
  ship_draw_last_rect = ship_draw_rect;
 
  temp_dc.SelectObject(wxNullBitmap);
}
 
void ChartCanvas::UpdateAlerts() {
  //  Get the rectangle in the current dc which bounds the detected Alert
  //  targets
 
  //  Use this dc
  wxClientDC dc(this);
 
  // Get dc boundary
  int sx, sy;
  dc.GetSize(&sx, &sy);
 
  //  Need a bitmap
  wxBitmap test_bitmap(sx, sy, -1);
 
  // Create a memory DC
  wxMemoryDC temp_dc;
  temp_dc.SelectObject(test_bitmap);
 
  temp_dc.ResetBoundingBox();
  temp_dc.DestroyClippingRegion();
  temp_dc.SetClippingRegion(wxRect(0, 0, sx, sy));
 
  // Draw the Alert Targets on the temp_dc
  ocpnDC ocpndc = ocpnDC(temp_dc);
  AlertDraw(ocpndc);
 
  //  Retrieve the drawing extents
  wxRect alert_rect(temp_dc.MinX(), temp_dc.MinY(),
                    temp_dc.MaxX() - temp_dc.MinX(),
                    temp_dc.MaxY() - temp_dc.MinY());
 
  if (!alert_rect.IsEmpty())
    alert_rect.Inflate(2);  // clear all drawing artifacts
 
  if (!alert_rect.IsEmpty() || !alert_draw_rect.IsEmpty()) {
    //  The required invalidate rectangle is the union of the last drawn
    //  rectangle and this drawn rectangle
    wxRect alert_update_rect = alert_draw_rect;
    alert_update_rect.Union(alert_rect);
 
    //  Invalidate the rectangular region
    RefreshRect(alert_update_rect, false);
  }
 
  //  Save this rectangle for next time
  alert_draw_rect = alert_rect;
 
  temp_dc.SelectObject(wxNullBitmap);  // clean up
}
 
void ChartCanvas::UpdateAIS() {
  if (!g_pAIS) return;
 
  //  Get the rectangle in the current dc which bounds the detected AIS targets
 
  //  Use this dc
  wxClientDC dc(this);
 
  // Get dc boundary
  int sx, sy;
  dc.GetSize(&sx, &sy);
 
  wxRect ais_rect;
 
  //  How many targets are there?
 
  //  If more than "some number", it will be cheaper to refresh the entire
  //  screen than to build update rectangles for each target.
  if (g_pAIS->GetTargetList().size() > 10) {
    ais_rect = wxRect(0, 0, sx, sy);  // full screen
  } else {
    //  Need a bitmap
    wxBitmap test_bitmap(sx, sy, -1);
 
    // Create a memory DC
    wxMemoryDC temp_dc;
    temp_dc.SelectObject(test_bitmap);
 
    temp_dc.ResetBoundingBox();
    temp_dc.DestroyClippingRegion();
    temp_dc.SetClippingRegion(wxRect(0, 0, sx, sy));
 
    // Draw the AIS Targets on the temp_dc
    ocpnDC ocpndc = ocpnDC(temp_dc);
    AISDraw(ocpndc, GetVP(), this);
    AISDrawAreaNotices(ocpndc, GetVP(), this);
 
    //  Retrieve the drawing extents
    ais_rect =
        wxRect(temp_dc.MinX(), temp_dc.MinY(), temp_dc.MaxX() - temp_dc.MinX(),
               temp_dc.MaxY() - temp_dc.MinY());
 
    if (!ais_rect.IsEmpty())
      ais_rect.Inflate(2);  // clear all drawing artifacts
 
    temp_dc.SelectObject(wxNullBitmap);  // clean up
  }
 
  if (!ais_rect.IsEmpty() || !ais_draw_rect.IsEmpty()) {
    //  The required invalidate rectangle is the union of the last drawn
    //  rectangle and this drawn rectangle
    wxRect ais_update_rect = ais_draw_rect;
    ais_update_rect.Union(ais_rect);
 
    //  Invalidate the rectangular region
    RefreshRect(ais_update_rect, false);
  }
 
  //  Save this rectangle for next time
  ais_draw_rect = ais_rect;
}
 
void ChartCanvas::ToggleCPAWarn() {
  if (!g_AisFirstTimeUse) g_bCPAWarn = !g_bCPAWarn;
  wxString mess;
  if (g_bCPAWarn) {
    g_bTCPA_Max = true;
    mess = _("ON");
  } else {
    g_bTCPA_Max = false;
    mess = _("OFF");
  }
  // Print to status bar if available.
  if (STAT_FIELD_SCALE >= 4 && parent_frame->GetStatusBar()) {
    parent_frame->SetStatusText(_("CPA alarm ") + mess, STAT_FIELD_SCALE);
  } else {
    if (!g_AisFirstTimeUse) {
      OCPNMessageBox(this, _("CPA Alarm is switched") + " " + mess.MakeLower(),
                     _("CPA") + " " + mess, 4, 4);
    }
  }
}
 
void ChartCanvas::OnActivate(wxActivateEvent &event) { ReloadVP(); }
 
void ChartCanvas::OnSize(wxSizeEvent &event) {
  if ((event.m_size.GetWidth() < 1) || (event.m_size.GetHeight() < 1)) return;
  // GetClientSize returns the size of the canvas area in logical pixels.
  GetClientSize(&m_canvas_width, &m_canvas_height);
 
#ifdef __WXOSX__
  // Support scaled HDPI displays.
  m_displayScale = GetContentScaleFactor();
#endif
 
  // Convert to physical pixels.
  m_canvas_width *= m_displayScale;
  m_canvas_height *= m_displayScale;
 
  //    Resize the current viewport
  VPoint.pix_width = m_canvas_width;
  VPoint.pix_height = m_canvas_height;
  VPoint.SetPixelScale(m_displayScale);
 
  //    Get some canvas metrics
 
  //          Rescale to current value, in order to rebuild VPoint data
  //          structures for new canvas size
  SetVPScale(GetVPScale());
 
  m_absolute_min_scale_ppm =
      m_canvas_width /
      (1.2 * WGS84_semimajor_axis_meters * PI);  // something like 180 degrees
 
  //  Inform the parent Frame that I am being resized...
  gFrame->ProcessCanvasResize();
 
  //  if MUIBar is active, size the bar
  //     if(g_useMUI && !m_muiBar){                          // rebuild if
  //     necessary
  //         m_muiBar = new MUIBar(this, wxHORIZONTAL);
  //         m_muiBarHOSize = m_muiBar->GetSize();
  //     }
 
  if (m_muiBar) {
    SetMUIBarPosition();
    UpdateFollowButtonState();
    m_muiBar->SetCanvasENCAvailable(m_bENCGroup);
  }
 
  //    Set up the scroll margins
  xr_margin = m_canvas_width * 95 / 100;
  xl_margin = m_canvas_width * 5 / 100;
  yt_margin = m_canvas_height * 5 / 100;
  yb_margin = m_canvas_height * 95 / 100;
 
  if (m_pQuilt)
    m_pQuilt->SetQuiltParameters(m_canvas_scale_factor, m_canvas_width);
 
  // Resize the scratch BM
  delete pscratch_bm;
  pscratch_bm = new wxBitmap(VPoint.pix_width, VPoint.pix_height, -1);
  m_brepaint_piano = true;
 
  // Resize the Route Calculation BM
  m_dc_route.SelectObject(wxNullBitmap);
  delete proute_bm;
  proute_bm = new wxBitmap(VPoint.pix_width, VPoint.pix_height, -1);
  m_dc_route.SelectObject(*proute_bm);
 
  //  Resize the saved Bitmap
  m_cached_chart_bm.Create(VPoint.pix_width, VPoint.pix_height, -1);
 
  //  Resize the working Bitmap
  m_working_bm.Create(VPoint.pix_width, VPoint.pix_height, -1);
 
  //  Rescale again, to capture all the changes for new canvas size
  SetVPScale(GetVPScale());
 
#ifdef ocpnUSE_GL
  if (/*g_bopengl &&*/ m_glcc) {
    // FIXME (dave)  This can go away?
    m_glcc->OnSize(event);
  }
#endif
 
  FormatPianoKeys();
  //  Invalidate the whole window
  ReloadVP();
}
 
void ChartCanvas::ProcessNewGUIScale() {
  // m_muiBar->Hide();
  delete m_muiBar;
  m_muiBar = 0;
 
  CreateMUIBar();
}
 
void ChartCanvas::CreateMUIBar() {
  if (g_useMUI && !m_muiBar) {  // rebuild if necessary
    m_muiBar = new MUIBar(this, wxHORIZONTAL, g_toolbar_scalefactor);
    m_muiBar->SetColorScheme(m_cs);
    m_muiBarHOSize = m_muiBar->m_size;
  }
 
  if (m_muiBar) {
    // We need to update the m_bENCGroup flag, not least for the initial
    // creation of a MUIBar
    if (ChartData) m_bENCGroup = ChartData->IsENCInGroup(m_groupIndex);
 
    SetMUIBarPosition();
    UpdateFollowButtonState();
    m_muiBar->UpdateDynamicValues();
    m_muiBar->SetCanvasENCAvailable(m_bENCGroup);
  }
}
 
void ChartCanvas::SetMUIBarPosition() {
  //  if MUIBar is active, size the bar
  if (m_muiBar) {
    // We estimate the piano width based on the canvas width
    int pianoWidth = GetClientSize().x * 0.6f;
    // If the piano already exists, we can use its exact width
    // if(m_Piano)
    // pianoWidth = m_Piano->GetWidth();
 
    if ((m_muiBar->GetOrientation() == wxHORIZONTAL)) {
      if (m_muiBarHOSize.x > (GetClientSize().x - pianoWidth)) {
        delete m_muiBar;
        m_muiBar = new MUIBar(this, wxVERTICAL, g_toolbar_scalefactor);
        m_muiBar->SetColorScheme(m_cs);
      }
    }
 
    if ((m_muiBar->GetOrientation() == wxVERTICAL)) {
      if (m_muiBarHOSize.x < (GetClientSize().x - pianoWidth)) {
        delete m_muiBar;
        m_muiBar = new MUIBar(this, wxHORIZONTAL, g_toolbar_scalefactor);
        m_muiBar->SetColorScheme(m_cs);
      }
    }
 
    m_muiBar->SetBestPosition();
  }
}
 
void ChartCanvas::DestroyMuiBar() {
  if (m_muiBar) {
    delete m_muiBar;
    m_muiBar = NULL;
  }
}
 
void ChartCanvas::ShowCompositeInfoWindow(
    int x, int n_charts, int scale, const std::vector<int> &index_vector) {
  if (n_charts > 0) {
    if (NULL == m_pCIWin) {
      m_pCIWin = new ChInfoWin(this);
      m_pCIWin->Hide();
    }
 
    if (!m_pCIWin->IsShown() || (m_pCIWin->chart_scale != scale)) {
      wxString s;
 
      s = _("Composite of ");
 
      wxString s1;
      s1.Printf("%d ", n_charts);
      if (n_charts > 1)
        s1 += _("charts");
      else
        s1 += _("chart");
      s += s1;
      s += '\n';
 
      s1.Printf(_("Chart scale"));
      s1 += ": ";
      wxString s2;
      s2.Printf("1:%d\n", scale);
      s += s1;
      s += s2;
 
      s1 = _("Zoom in for more information");
      s += s1;
      s += '\n';
 
      int char_width = s1.Length();
      int char_height = 3;
 
      if (g_bChartBarEx) {
        s += '\n';
        int j = 0;
        for (int i : index_vector) {
          const ChartTableEntry &cte = ChartData->GetChartTableEntry(i);
          wxString path = cte.GetFullSystemPath();
          s += path;
          s += '\n';
          char_height++;
          char_width = wxMax(char_width, path.Length());
          if (j++ >= 9) break;
        }
        if (j >= 9) {
          s += "   .\n   .\n   .\n";
          char_height += 3;
        }
        s += '\n';
        char_height += 1;
 
        char_width += 4;  // Fluff
      }
 
      m_pCIWin->SetString(s);
 
      m_pCIWin->FitToChars(char_width, char_height);
 
      wxPoint p;
      p.x = x / GetContentScaleFactor();
      if ((p.x + m_pCIWin->GetWinSize().x) >
          (m_canvas_width / GetContentScaleFactor()))
        p.x = ((m_canvas_width / GetContentScaleFactor()) -
               m_pCIWin->GetWinSize().x) /
              2;  // centered
 
      p.y = (m_canvas_height - m_Piano->GetHeight()) / GetContentScaleFactor() -
            4 - m_pCIWin->GetWinSize().y;
 
      m_pCIWin->dbIndex = 0;
      m_pCIWin->chart_scale = 0;
      m_pCIWin->SetPosition(p);
      m_pCIWin->SetBitmap();
      m_pCIWin->Refresh();
      m_pCIWin->Show();
    }
  } else {
    HideChartInfoWindow();
  }
}
 
void ChartCanvas::ShowChartInfoWindow(int x, int dbIndex) {
  if (dbIndex >= 0) {
    if (NULL == m_pCIWin) {
      m_pCIWin = new ChInfoWin(this);
      m_pCIWin->Hide();
    }
 
    if (!m_pCIWin->IsShown() || (m_pCIWin->dbIndex != dbIndex)) {
      wxString s;
      ChartBase *pc = NULL;
 
      // TOCTOU race but worst case will reload chart.
      // need to lock it or the background spooler may evict charts in
      // OpenChartFromDBAndLock
      if ((ChartData->IsChartInCache(dbIndex)) && ChartData->IsValid())
        pc = ChartData->OpenChartFromDBAndLock(
            dbIndex, FULL_INIT);  // this must come from cache
 
      int char_width, char_height;
      s = ChartData->GetFullChartInfo(pc, dbIndex, &char_width, &char_height);
      if (pc) ChartData->UnLockCacheChart(dbIndex);
 
      m_pCIWin->SetString(s);
      m_pCIWin->FitToChars(char_width, char_height);
 
      wxPoint p;
      p.x = x / GetContentScaleFactor();
      if ((p.x + m_pCIWin->GetWinSize().x) >
          (m_canvas_width / GetContentScaleFactor()))
        p.x = ((m_canvas_width / GetContentScaleFactor()) -
               m_pCIWin->GetWinSize().x) /
              2;  // centered
 
      p.y = (m_canvas_height - m_Piano->GetHeight()) / GetContentScaleFactor() -
            4 - m_pCIWin->GetWinSize().y;
 
      m_pCIWin->dbIndex = dbIndex;
      m_pCIWin->SetPosition(p);
      m_pCIWin->SetBitmap();
      m_pCIWin->Refresh();
      m_pCIWin->Show();
    }
  } else {
    HideChartInfoWindow();
  }
}
 
void ChartCanvas::HideChartInfoWindow() {
  if (m_pCIWin /*&& m_pCIWin->IsShown()*/) {
    m_pCIWin->Hide();
    m_pCIWin->Destroy();
    m_pCIWin = NULL;
 
#ifdef __ANDROID__
    androidForceFullRepaint();
#endif
  }
}
 
void ChartCanvas::PanTimerEvent(wxTimerEvent &event) {
  wxMouseEvent ev(wxEVT_MOTION);
  ev.m_x = mouse_x;
  ev.m_y = mouse_y;
  ev.m_leftDown = mouse_leftisdown;
 
  wxEvtHandler *evthp = GetEventHandler();
 
  ::wxPostEvent(evthp, ev);
}
 
void ChartCanvas::MovementTimerEvent(wxTimerEvent &) {
  if ((m_panx_target_final - m_panx_target_now) ||
      (m_pany_target_final - m_pany_target_now)) {
    DoTimedMovementTarget();
  } else
    DoTimedMovement();
}
 
void ChartCanvas::MovementStopTimerEvent(wxTimerEvent &) { StopMovement(); }
 
bool ChartCanvas::CheckEdgePan(int x, int y, bool bdragging, int margin,
                               int delta) {
  if (m_disable_edge_pan) return false;
 
  bool bft = false;
  int pan_margin = m_canvas_width * margin / 100;
  int pan_timer_set = 200;
  double pan_delta = GetVP().pix_width * delta / 100;
  int pan_x = 0;
  int pan_y = 0;
 
  if (x > m_canvas_width - pan_margin) {
    bft = true;
    pan_x = pan_delta;
  }
 
  else if (x < pan_margin) {
    bft = true;
    pan_x = -pan_delta;
  }
 
  if (y < pan_margin) {
    bft = true;
    pan_y = -pan_delta;
  }
 
  else if (y > m_canvas_height - pan_margin) {
    bft = true;
    pan_y = pan_delta;
  }
 
  //    Of course, if dragging, and the mouse left button is not down, we must
  //    stop the event injection
  if (bdragging) {
    if (!g_btouch) {
      wxMouseState state = ::wxGetMouseState();
#if wxCHECK_VERSION(3, 0, 0)
      if (!state.LeftIsDown())
#else
      if (!state.LeftDown())
#endif
        bft = false;
    }
  }
  if ((bft) && !pPanTimer->IsRunning()) {
    PanCanvas(pan_x, pan_y);
    pPanTimer->Start(pan_timer_set, wxTIMER_ONE_SHOT);
    return true;
  }
 
  //    This mouse event must not be due to pan timer event injector
  //    Mouse is out of the pan zone, so prevent any orphan event injection
  if ((!bft) && pPanTimer->IsRunning()) {
    pPanTimer->Stop();
  }
 
  return (false);
}
 
// Look for waypoints at the current position.
// Used to determine what a mouse event should act on.
 
void ChartCanvas::FindRoutePointsAtCursor(float selectRadius,
                                          bool setBeingEdited) {
  m_lastRoutePointEditTarget = m_pRoutePointEditTarget;  // save a copy
  m_pRoutePointEditTarget = NULL;
  m_pFoundPoint = NULL;
 
  SelectItem *pFind = NULL;
  SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
  SelectableItemList SelList = pSelect->FindSelectionList(
      ctx, m_cursor_lat, m_cursor_lon, SELTYPE_ROUTEPOINT);
  for (SelectItem *pFind : SelList) {
    RoutePoint *frp = (RoutePoint *)pFind->m_pData1;
 
    //    Get an array of all routes using this point
    m_pEditRouteArray = g_pRouteMan->GetRouteArrayContaining(frp);
    // TODO: delete m_pEditRouteArray after use?
 
    // Use route array to determine actual visibility for the point
    bool brp_viz = false;
    if (m_pEditRouteArray) {
      for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount(); ir++) {
        Route *pr = (Route *)m_pEditRouteArray->Item(ir);
        if (pr->IsVisible()) {
          brp_viz = true;
          break;
        }
      }
    } else
      brp_viz = frp->IsVisible();  // isolated point
 
    if (brp_viz) {
      //    Use route array to rubberband all affected routes
      if (m_pEditRouteArray)  // Editing Waypoint as part of route
      {
        for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount(); ir++) {
          Route *pr = (Route *)m_pEditRouteArray->Item(ir);
          pr->m_bIsBeingEdited = setBeingEdited;
        }
        m_bRouteEditing = setBeingEdited;
      } else  // editing Mark
      {
        frp->m_bRPIsBeingEdited = setBeingEdited;
        m_bMarkEditing = setBeingEdited;
      }
 
      m_pRoutePointEditTarget = frp;
      m_pFoundPoint = pFind;
      break;  // out of the while(node)
    }
  }  // for (SelectItem...
}
std::shared_ptr<HostApi121::PiPointContext>
ChartCanvas::GetCanvasContextAtPoint(int x, int y) {
  // General Right Click
  // Look for selectable objects
  double slat, slon;
  GetCanvasPixPoint(x, y, slat, slon);
 
  SelectItem *pFindAIS;
  SelectItem *pFindRP;
  SelectItem *pFindRouteSeg;
  SelectItem *pFindTrackSeg;
  SelectItem *pFindCurrent = NULL;
  SelectItem *pFindTide = NULL;
 
  //      Get all the selectable things at the selected point
  SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
  pFindAIS = pSelectAIS->FindSelection(ctx, slat, slon, SELTYPE_AISTARGET);
  pFindRP = pSelect->FindSelection(ctx, slat, slon, SELTYPE_ROUTEPOINT);
  pFindRouteSeg = pSelect->FindSelection(ctx, slat, slon, SELTYPE_ROUTESEGMENT);
  pFindTrackSeg = pSelect->FindSelection(ctx, slat, slon, SELTYPE_TRACKSEGMENT);
 
  if (m_bShowCurrent)
    pFindCurrent =
        pSelectTC->FindSelection(ctx, slat, slon, SELTYPE_CURRENTPOINT);
 
  if (m_bShowTide)  // look for tide stations
    pFindTide = pSelectTC->FindSelection(ctx, slat, slon, SELTYPE_TIDEPOINT);
 
  int seltype = 0;
 
  //    Try for AIS targets first
  int FoundAIS_MMSI = 0;
  if (pFindAIS) {
    FoundAIS_MMSI = pFindAIS->GetUserData();
 
    //      Make sure the target data is available
    if (g_pAIS->Get_Target_Data_From_MMSI(FoundAIS_MMSI))
      seltype |= SELTYPE_AISTARGET;
  }
 
  //    Now the various Route Parts
 
  RoutePoint *FoundRoutePoint = NULL;
  Route *SelectedRoute = NULL;
 
  if (pFindRP) {
    RoutePoint *pFirstVizPoint = NULL;
    RoutePoint *pFoundActiveRoutePoint = NULL;
    RoutePoint *pFoundVizRoutePoint = NULL;
    Route *pSelectedActiveRoute = NULL;
    Route *pSelectedVizRoute = NULL;
 
    // There is at least one routepoint, so get the whole list
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    SelectableItemList SelList =
        pSelect->FindSelectionList(ctx, slat, slon, SELTYPE_ROUTEPOINT);
    for (SelectItem *pFindSel : SelList) {
      RoutePoint *prp = (RoutePoint *)pFindSel->m_pData1;  // candidate
 
      //    Get an array of all routes using this point
      wxArrayPtrVoid *proute_array = g_pRouteMan->GetRouteArrayContaining(prp);
 
      // Use route array (if any) to determine actual visibility for this point
      bool brp_viz = false;
      if (proute_array) {
        for (unsigned int ir = 0; ir < proute_array->GetCount(); ir++) {
          Route *pr = (Route *)proute_array->Item(ir);
          if (pr->IsVisible()) {
            brp_viz = true;
            break;
          }
        }
        if (!brp_viz && prp->IsShared())  // is not visible as part of route,
                                          // but still exists as a waypoint
          brp_viz = prp->IsVisible();     //  so treat as isolated point
 
      } else
        brp_viz = prp->IsVisible();  // isolated point
 
      if ((NULL == pFirstVizPoint) && brp_viz) pFirstVizPoint = prp;
 
      // Use route array to choose the appropriate route
      // Give preference to any active route, otherwise select the first visible
      // route in the array for this point
      if (proute_array) {
        for (unsigned int ir = 0; ir < proute_array->GetCount(); ir++) {
          Route *pr = (Route *)proute_array->Item(ir);
          if (pr->m_bRtIsActive) {
            pSelectedActiveRoute = pr;
            pFoundActiveRoutePoint = prp;
            break;
          }
        }
 
        if (NULL == pSelectedVizRoute) {
          for (unsigned int ir = 0; ir < proute_array->GetCount(); ir++) {
            Route *pr = (Route *)proute_array->Item(ir);
            if (pr->IsVisible()) {
              pSelectedVizRoute = pr;
              pFoundVizRoutePoint = prp;
              break;
            }
          }
        }
 
        delete proute_array;
      }
    }
 
    //      Now choose the "best" selections
    if (pFoundActiveRoutePoint) {
      FoundRoutePoint = pFoundActiveRoutePoint;
      SelectedRoute = pSelectedActiveRoute;
    } else if (pFoundVizRoutePoint) {
      FoundRoutePoint = pFoundVizRoutePoint;
      SelectedRoute = pSelectedVizRoute;
    } else
      // default is first visible point in list
      FoundRoutePoint = pFirstVizPoint;
 
    if (SelectedRoute) {
      if (SelectedRoute->IsVisible()) seltype |= SELTYPE_ROUTEPOINT;
    } else if (FoundRoutePoint) {
      seltype |= SELTYPE_MARKPOINT;
    }
 
    // Highlight the selected point, to verify the proper right click selection
#if 0
    if (m_pFoundRoutePoint) {
      m_pFoundRoutePoint->m_bPtIsSelected = true;
      wxRect wp_rect;
      RoutePointGui(*m_pFoundRoutePoint)
          .CalculateDCRect(m_dc_route, this, &wp_rect);
      RefreshRect(wp_rect, true);
    }
#endif
  }
 
  // Note here that we use SELTYPE_ROUTESEGMENT to select tracks as well as
  // routes But call the popup handler with identifier appropriate to the type
  if (pFindRouteSeg)  // there is at least one select item
  {
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    SelectableItemList SelList =
        pSelect->FindSelectionList(ctx, slat, slon, SELTYPE_ROUTESEGMENT);
 
    if (NULL == SelectedRoute)  // the case where a segment only is selected
    {
      //  Choose the first visible route containing segment in the list
      for (SelectItem *pFindSel : SelList) {
        Route *pr = (Route *)pFindSel->m_pData3;
        if (pr->IsVisible()) {
          SelectedRoute = pr;
          break;
        }
      }
    }
 
    if (SelectedRoute) {
      if (NULL == FoundRoutePoint)
        FoundRoutePoint = (RoutePoint *)pFindRouteSeg->m_pData1;
 
      SelectedRoute->m_bRtIsSelected = !(seltype & SELTYPE_ROUTEPOINT);
      seltype |= SELTYPE_ROUTESEGMENT;
    }
  }
 
  if (pFindTrackSeg) {
    m_pSelectedTrack = NULL;
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    SelectableItemList SelList =
        pSelect->FindSelectionList(ctx, slat, slon, SELTYPE_TRACKSEGMENT);
 
    //  Choose the first visible track containing segment in the list
    for (SelectItem *pFindSel : SelList) {
      Track *pt = (Track *)pFindSel->m_pData3;
      if (pt->IsVisible()) {
        m_pSelectedTrack = pt;
        break;
      }
    }
    if (m_pSelectedTrack) seltype |= SELTYPE_TRACKSEGMENT;
  }
 
  if (0 == seltype) seltype |= SELTYPE_UNKNOWN;
 
  // Populate the return struct
  auto rstruct = std::make_shared<HostApi121::PiPointContext>();
  rstruct->object_type = HostApi121::PiContextObjectType::kObjectChart;
  rstruct->object_ident = "";
 
  if (seltype == SELTYPE_AISTARGET) {
    rstruct->object_type = HostApi121::PiContextObjectType::kObjectAisTarget;
    wxString val;
    val.Printf("%d", FoundAIS_MMSI);
    rstruct->object_ident = val.ToStdString();
  } else if (seltype & SELTYPE_MARKPOINT) {
    if (FoundRoutePoint) {
      rstruct->object_type = HostApi121::PiContextObjectType::kObjectRoutepoint;
      rstruct->object_ident = FoundRoutePoint->m_GUID.ToStdString();
    }
  } else if (seltype & SELTYPE_ROUTESEGMENT) {
    if (SelectedRoute) {
      rstruct->object_type =
          HostApi121::PiContextObjectType::kObjectRoutesegment;
      rstruct->object_ident = SelectedRoute->m_GUID.ToStdString();
    }
  } else if (seltype & SELTYPE_TRACKSEGMENT) {
    if (m_pSelectedTrack) {
      rstruct->object_type =
          HostApi121::PiContextObjectType::kObjectTracksegment;
      rstruct->object_ident = m_pSelectedTrack->m_GUID.ToStdString();
    }
  }
 
  return rstruct;
}
 
void ChartCanvas::MouseTimedEvent(wxTimerEvent &event) {
  if (singleClickEventIsValid) MouseEvent(singleClickEvent);
  singleClickEventIsValid = false;
  m_DoubleClickTimer->Stop();
}
 
bool leftIsDown;
 
bool ChartCanvas::MouseEventOverlayWindows(wxMouseEvent &event) {
  if (!m_bChartDragging && !m_bDrawingRoute) {
    /*
     * The m_Compass->GetRect() coordinates are in physical pixels, whereas the
     * mouse event coordinates are in logical pixels.
     */
    if (m_Compass && m_Compass->IsShown()) {
      wxRect logicalRect = m_Compass->GetLogicalRect();
      bool isInCompass = logicalRect.Contains(event.GetPosition());
      if (isInCompass || m_mouseWasInCompass) {
        if (m_Compass->MouseEvent(event)) {
          cursor_region = CENTER;
          if (!g_btouch) SetCanvasCursor(event);
          m_mouseWasInCompass = isInCompass;
          return true;
        }
      }
      m_mouseWasInCompass = isInCompass;
    }
 
    if (m_notification_button && m_notification_button->IsShown()) {
      wxRect logicalRect = m_notification_button->GetLogicalRect();
      bool isinButton = logicalRect.Contains(event.GetPosition());
      if (isinButton) {
        SetCursor(*pCursorArrow);
        if (event.LeftDown()) HandleNotificationMouseClick();
        return true;
      }
    }
 
    if (MouseEventToolbar(event)) return true;
 
    if (MouseEventChartBar(event)) return true;
 
    if (MouseEventMUIBar(event)) return true;
 
    if (MouseEventIENCBar(event)) return true;
  }
  return false;
}
 
void ChartCanvas::HandleNotificationMouseClick() {
  if (!m_NotificationsList) {
    m_NotificationsList = new NotificationsList(this);
 
    // calculate best size for Notification list
    m_NotificationsList->RecalculateSize();
    m_NotificationsList->Hide();
  }
 
  if (m_NotificationsList->IsShown()) {
    m_NotificationsList->Hide();
  } else {
    m_NotificationsList->RecalculateSize();
    m_NotificationsList->ReloadNotificationList();
    m_NotificationsList->Show();
  }
}
bool ChartCanvas::MouseEventChartBar(wxMouseEvent &event) {
  if (!g_bShowChartBar) return false;
 
  if (!m_Piano->MouseEvent(event)) return false;
 
  cursor_region = CENTER;
  if (!g_btouch) SetCanvasCursor(event);
  return true;
}
 
bool ChartCanvas::MouseEventToolbar(wxMouseEvent &event) {
  if (!IsPrimaryCanvas()) return false;
 
  if (g_MainToolbar) {
    if (!g_MainToolbar->MouseEvent(event))
      return false;
    else
      g_MainToolbar->RefreshToolbar();
  }
 
  cursor_region = CENTER;
  if (!g_btouch) SetCanvasCursor(event);
  return true;
}
 
bool ChartCanvas::MouseEventIENCBar(wxMouseEvent &event) {
  if (!IsPrimaryCanvas()) return false;
 
  if (g_iENCToolbar) {
    if (!g_iENCToolbar->MouseEvent(event))
      return false;
    else {
      g_iENCToolbar->RefreshToolbar();
      return true;
    }
  }
  return false;
}
 
bool ChartCanvas::MouseEventMUIBar(wxMouseEvent &event) {
  if (m_muiBar) {
    if (!m_muiBar->MouseEvent(event)) return false;
  }
 
  cursor_region = CENTER;
  if (!g_btouch) SetCanvasCursor(event);
  if (m_muiBar)
    return true;
  else
    return false;
}
 
bool ChartCanvas::MouseEventSetup(wxMouseEvent &event, bool b_handle_dclick) {
  int x, y;
 
  bool bret = false;
 
  event.GetPosition(&x, &y);
 
  x *= m_displayScale;
  y *= m_displayScale;
 
  m_MouseDragging = event.Dragging();
 
  //  Some systems produce null drag events, where the pointer position has not
  //  changed from the previous value. Detect this case, and abort further
  //  processing (FS#1748)
#ifdef __WXMSW__
  if (event.Dragging()) {
    if ((x == mouse_x) && (y == mouse_y)) return true;
  }
#endif
 
  mouse_x = x;
  mouse_y = y;
  mouse_leftisdown = event.LeftDown();
  GetCanvasPixPoint(x, y, m_cursor_lat, m_cursor_lon);
 
  //  Establish the event region
  cursor_region = CENTER;
 
  int chartbar_height = GetChartbarHeight();
 
  if (m_Compass && m_Compass->IsShown() &&
      m_Compass->GetRect().Contains(event.GetPosition())) {
    cursor_region = CENTER;
  } else if (x > xr_margin) {
    cursor_region = MID_RIGHT;
  } else if (x < xl_margin) {
    cursor_region = MID_LEFT;
  } else if (y > yb_margin - chartbar_height &&
             y < m_canvas_height - chartbar_height) {
    cursor_region = MID_TOP;
  } else if (y < yt_margin) {
    cursor_region = MID_BOT;
  } else {
    cursor_region = CENTER;
  }
 
  if (!g_btouch) SetCanvasCursor(event);
 
  // Protect from leftUp's coming from event handlers in child
  // windows who return focus to the canvas.
  leftIsDown = event.LeftDown();
 
#ifndef __WXOSX__
  if (event.LeftDown()) {
    if (g_bShowMenuBar == false && g_bTempShowMenuBar == true) {
      // The menu bar is temporarily visible due to alt having been pressed.
      // Clicking will hide it, and do nothing else.
      g_bTempShowMenuBar = false;
      parent_frame->ApplyGlobalSettings(false);
      return (true);
    }
  }
#endif
 
  // Update modifiers here; some window managers never send the key event
  m_modkeys = 0;
  if (event.ControlDown()) m_modkeys |= wxMOD_CONTROL;
  if (event.AltDown()) m_modkeys |= wxMOD_ALT;
 
#ifdef __WXMSW__
  // TODO Test carefully in other platforms, remove ifdef....
  if (event.ButtonDown() && !HasCapture()) CaptureMouse();
  if (event.ButtonUp() && HasCapture()) ReleaseMouse();
#endif
 
  event.SetEventObject(this);
  if (SendMouseEventToPlugins(event))
    return (true);  // PlugIn did something, and does not want the canvas to
                    // do anything else
 
  // Capture LeftUp's and time them, unless it already came from the timer.
 
  // Detect end of chart dragging
  if (g_btouch && !m_inPinch && m_bChartDragging && event.LeftUp()) {
    StartChartDragInertia();
  }
 
  if (!g_btouch && b_handle_dclick && event.LeftUp() &&
      !singleClickEventIsValid) {
    // Ignore the second LeftUp after the DClick.
    if (m_DoubleClickTimer->IsRunning()) {
      m_DoubleClickTimer->Stop();
      return (true);
    }
 
    // Save the event for later running if there is no DClick.
    m_DoubleClickTimer->Start(350, wxTIMER_ONE_SHOT);
    singleClickEvent = event;
    singleClickEventIsValid = true;
    return (true);
  }
 
  //  This logic is necessary on MSW to handle the case where
  //  a context (right-click) menu is dismissed without action
  //  by clicking on the chart surface.
  //  We need to avoid an unintentional pan by eating some clicks...
#ifdef __WXMSW__
  if (event.LeftDown() || event.LeftUp() || event.Dragging()) {
    if (g_click_stop > 0) {
      g_click_stop--;
      return (true);
    }
  }
#endif
 
  //  Kick off the Rotation control timer
  if (GetUpMode() == COURSE_UP_MODE) {
    m_b_rot_hidef = false;
    pRotDefTimer->Start(500, wxTIMER_ONE_SHOT);
  } else
    pRotDefTimer->Stop();
 
  //      Retrigger the route leg / AIS target popup timer
  bool bRoll = !g_btouch;
#ifdef __ANDROID__
  bRoll = g_bRollover;
#endif
  if (bRoll) {
    if ((m_pRouteRolloverWin && m_pRouteRolloverWin->IsActive()) ||
        (m_pTrackRolloverWin && m_pTrackRolloverWin->IsActive()) ||
        (m_pAISRolloverWin && m_pAISRolloverWin->IsActive()))
      m_RolloverPopupTimer.Start(
          10,
          wxTIMER_ONE_SHOT);  // faster response while the rollover is turned on
    else
      m_RolloverPopupTimer.Start(m_rollover_popup_timer_msec, wxTIMER_ONE_SHOT);
  }
 
  //  Retrigger the cursor tracking timer
  pCurTrackTimer->Start(m_curtrack_timer_msec, wxTIMER_ONE_SHOT);
 
//      Show cursor position on Status Bar, if present
//      except for GTK, under which status bar updates are very slow
//      due to Update() call.
//      In this case, as a workaround, update the status window
//      after an interval timer (pCurTrackTimer) pops, which will happen
//      whenever the mouse has stopped moving for specified interval.
//      See the method OnCursorTrackTimerEvent()
#if !defined(__WXGTK__) && !defined(__WXQT__)
  SetCursorStatus(m_cursor_lat, m_cursor_lon);
#endif
 
  //  Send the current cursor lat/lon to all PlugIns requesting it
  if (g_pi_manager) {
    //  Occasionally, MSW will produce nonsense events on right click....
    //  This results in an error in cursor geo position, so we skip this case
    if ((x >= 0) && (y >= 0))
      SendCursorLatLonToAllPlugIns(m_cursor_lat, m_cursor_lon);
  }
 
  if (!g_btouch) {
    if ((m_bMeasure_Active && (m_nMeasureState >= 2)) || (m_routeState > 1)) {
      wxPoint p = ClientToScreen(wxPoint(x, y));
    }
  }
 
  if (1 ) {
    //    Route Creation Rubber Banding
    if (m_routeState >= 2) {
      r_rband.x = x;
      r_rband.y = y;
      m_bDrawingRoute = true;
 
      if (!g_btouch) CheckEdgePan(x, y, event.Dragging(), 5, 2);
      Refresh(false);
    }
 
    //    Measure Tool Rubber Banding
    if (m_bMeasure_Active && (m_nMeasureState >= 2)) {
      r_rband.x = x;
      r_rband.y = y;
      m_bDrawingRoute = true;
 
      if (!g_btouch) CheckEdgePan(x, y, event.Dragging(), 5, 2);
      Refresh(false);
    }
  }
  return bret;
}
 
int ChartCanvas::PrepareContextSelections(double lat, double lon) {
  // On general Right Click
  // Look for selectable objects
  double slat = lat;
  double slon = lon;
 
#if defined(__WXMAC__) || defined(__ANDROID__)
  wxScreenDC sdc;
  ocpnDC dc(sdc);
#else
  wxClientDC cdc(GetParent());
  ocpnDC dc(cdc);
#endif
 
  SelectItem *pFindAIS;
  SelectItem *pFindRP;
  SelectItem *pFindRouteSeg;
  SelectItem *pFindTrackSeg;
  SelectItem *pFindCurrent = NULL;
  SelectItem *pFindTide = NULL;
 
  //    Deselect any current objects
  if (m_pSelectedRoute) {
    m_pSelectedRoute->m_bRtIsSelected = false;  // Only one selection at a time
    m_pSelectedRoute->DeSelectRoute();
#ifdef ocpnUSE_GL
    if (g_bopengl && m_glcc) {
      InvalidateGL();
      Update();
    } else
#endif
      RouteGui(*m_pSelectedRoute).Draw(dc, this, GetVP().GetBBox());
  }
 
  if (m_pFoundRoutePoint) {
    m_pFoundRoutePoint->m_bPtIsSelected = false;
    RoutePointGui(*m_pFoundRoutePoint).Draw(dc, this);
    RefreshRect(m_pFoundRoutePoint->CurrentRect_in_DC);
  }
 
  if (g_btouch && m_pRoutePointEditTarget) {
    m_pRoutePointEditTarget->m_bRPIsBeingEdited = false;
    m_pRoutePointEditTarget->m_bPtIsSelected = false;
    RoutePointGui(*m_pRoutePointEditTarget).EnableDragHandle(false);
  }
 
  //      Get all the selectable things at the cursor
  SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
  pFindAIS = pSelectAIS->FindSelection(ctx, slat, slon, SELTYPE_AISTARGET);
  pFindRP = pSelect->FindSelection(ctx, slat, slon, SELTYPE_ROUTEPOINT);
  pFindRouteSeg = pSelect->FindSelection(ctx, slat, slon, SELTYPE_ROUTESEGMENT);
  pFindTrackSeg = pSelect->FindSelection(ctx, slat, slon, SELTYPE_TRACKSEGMENT);
 
  if (m_bShowCurrent)
    pFindCurrent =
        pSelectTC->FindSelection(ctx, slat, slon, SELTYPE_CURRENTPOINT);
 
  if (m_bShowTide)  // look for tide stations
    pFindTide = pSelectTC->FindSelection(ctx, slat, slon, SELTYPE_TIDEPOINT);
 
  int seltype = 0;
 
  //    Try for AIS targets first
  if (pFindAIS) {
    m_FoundAIS_MMSI = pFindAIS->GetUserData();
 
    //      Make sure the target data is available
    if (g_pAIS->Get_Target_Data_From_MMSI(m_FoundAIS_MMSI))
      seltype |= SELTYPE_AISTARGET;
  }
 
  //    Now examine the various Route parts
 
  m_pFoundRoutePoint = NULL;
  if (pFindRP) {
    RoutePoint *pFirstVizPoint = NULL;
    RoutePoint *pFoundActiveRoutePoint = NULL;
    RoutePoint *pFoundVizRoutePoint = NULL;
    Route *pSelectedActiveRoute = NULL;
    Route *pSelectedVizRoute = NULL;
 
    // There is at least one routepoint, so get the whole list
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    SelectableItemList SelList =
        pSelect->FindSelectionList(ctx, slat, slon, SELTYPE_ROUTEPOINT);
    for (SelectItem *pFindSel : SelList) {
      RoutePoint *prp = (RoutePoint *)pFindSel->m_pData1;  // candidate
 
      //    Get an array of all routes using this point
      wxArrayPtrVoid *proute_array = g_pRouteMan->GetRouteArrayContaining(prp);
 
      // Use route array (if any) to determine actual visibility for this point
      bool brp_viz = false;
      if (proute_array) {
        for (unsigned int ir = 0; ir < proute_array->GetCount(); ir++) {
          Route *pr = (Route *)proute_array->Item(ir);
          if (pr->IsVisible()) {
            brp_viz = true;
            break;
          }
        }
        if (!brp_viz && prp->IsShared())  // is not visible as part of route,
                                          // but still exists as a waypoint
          brp_viz = prp->IsVisible();     //  so treat as isolated point
 
      } else
        brp_viz = prp->IsVisible();  // isolated point
 
      if ((NULL == pFirstVizPoint) && brp_viz) pFirstVizPoint = prp;
 
      // Use route array to choose the appropriate route
      // Give preference to any active route, otherwise select the first visible
      // route in the array for this point
      m_pSelectedRoute = NULL;
      if (proute_array) {
        for (unsigned int ir = 0; ir < proute_array->GetCount(); ir++) {
          Route *pr = (Route *)proute_array->Item(ir);
          if (pr->m_bRtIsActive) {
            pSelectedActiveRoute = pr;
            pFoundActiveRoutePoint = prp;
            break;
          }
        }
 
        if (NULL == pSelectedVizRoute) {
          for (unsigned int ir = 0; ir < proute_array->GetCount(); ir++) {
            Route *pr = (Route *)proute_array->Item(ir);
            if (pr->IsVisible()) {
              pSelectedVizRoute = pr;
              pFoundVizRoutePoint = prp;
              break;
            }
          }
        }
 
        delete proute_array;
      }
    }
 
    //      Now choose the "best" selections
    if (pFoundActiveRoutePoint) {
      m_pFoundRoutePoint = pFoundActiveRoutePoint;
      m_pSelectedRoute = pSelectedActiveRoute;
    } else if (pFoundVizRoutePoint) {
      m_pFoundRoutePoint = pFoundVizRoutePoint;
      m_pSelectedRoute = pSelectedVizRoute;
    } else
      // default is first visible point in list
      m_pFoundRoutePoint = pFirstVizPoint;
 
    if (m_pSelectedRoute) {
      if (m_pSelectedRoute->IsVisible()) seltype |= SELTYPE_ROUTEPOINT;
    } else if (m_pFoundRoutePoint) {
      seltype |= SELTYPE_MARKPOINT;
    }
 
    // Highlight the selected point, to verify the proper right click selection
    if (m_pFoundRoutePoint) {
      m_pFoundRoutePoint->m_bPtIsSelected = true;
      wxRect wp_rect;
      RoutePointGui(*m_pFoundRoutePoint)
          .CalculateDCRect(m_dc_route, this, &wp_rect);
      RefreshRect(wp_rect, true);
    }
  }
 
  // Note here that we use SELTYPE_ROUTESEGMENT to select tracks as well as
  // routes But call the popup handler with identifier appropriate to the type
  if (pFindRouteSeg)  // there is at least one select item
  {
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    SelectableItemList SelList =
        pSelect->FindSelectionList(ctx, slat, slon, SELTYPE_ROUTESEGMENT);
 
    if (NULL == m_pSelectedRoute)  // the case where a segment only is selected
    {
      //  Choose the first visible route containing segment in the list
      for (SelectItem *pFindSel : SelList) {
        Route *pr = (Route *)pFindSel->m_pData3;
        if (pr->IsVisible()) {
          m_pSelectedRoute = pr;
          break;
        }
      }
    }
 
    if (m_pSelectedRoute) {
      if (NULL == m_pFoundRoutePoint)
        m_pFoundRoutePoint = (RoutePoint *)pFindRouteSeg->m_pData1;
 
      m_pSelectedRoute->m_bRtIsSelected = !(seltype & SELTYPE_ROUTEPOINT);
      if (m_pSelectedRoute->m_bRtIsSelected) {
#ifdef ocpnUSE_GL
        if (g_bopengl && m_glcc) {
          InvalidateGL();
          Update();
        } else
#endif
          RouteGui(*m_pSelectedRoute).Draw(dc, this, GetVP().GetBBox());
      }
      seltype |= SELTYPE_ROUTESEGMENT;
    }
  }
 
  if (pFindTrackSeg) {
    m_pSelectedTrack = NULL;
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    SelectableItemList SelList =
        pSelect->FindSelectionList(ctx, slat, slon, SELTYPE_TRACKSEGMENT);
 
    //  Choose the first visible track containing segment in the list
    for (SelectItem *pFindSel : SelList) {
      Track *pt = (Track *)pFindSel->m_pData3;
      if (pt->IsVisible()) {
        m_pSelectedTrack = pt;
        break;
      }
    }
    if (m_pSelectedTrack) seltype |= SELTYPE_TRACKSEGMENT;
  }
 
#if 0  // disable tide and current graph on right click
  {
    if (pFindCurrent) {
      m_pIDXCandidate = FindBestCurrentObject(slat, slon);
      seltype |= SELTYPE_CURRENTPOINT;
    }
 
    else if (pFindTide) {
      m_pIDXCandidate = (IDX_entry *)pFindTide->m_pData1;
      seltype |= SELTYPE_TIDEPOINT;
    }
  }
#endif
 
  if (0 == seltype) seltype |= SELTYPE_UNKNOWN;
 
  return seltype;
}
 
IDX_entry *ChartCanvas::FindBestCurrentObject(double lat, double lon) {
  // There may be multiple current entries at the same point.
  // For example, there often is a current substation (with directions
  // specified) co-located with its master.  We want to select the
  // substation, so that the direction will be properly indicated on the
  // graphic. So, we search the select list looking for IDX_type == 'c' (i.e
  // substation)
  IDX_entry *pIDX_best_candidate;
 
  SelectItem *pFind = NULL;
  SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
  SelectableItemList SelList =
      pSelectTC->FindSelectionList(ctx, lat, lon, SELTYPE_CURRENTPOINT);
 
  //      Default is first entry
  pFind = *SelList.begin();
  pIDX_best_candidate = (IDX_entry *)(pFind->m_pData1);
 
  auto node = SelList.begin();
  if (SelList.size() > 1) {
    for (++node; node != SelList.end(); ++node) {
      pFind = *node;
      IDX_entry *pIDX_candidate = (IDX_entry *)(pFind->m_pData1);
      if (pIDX_candidate->IDX_type == 'c') {
        pIDX_best_candidate = pIDX_candidate;
        break;
      }
    }  // while (node)
  } else {
    pFind = *SelList.begin();
    pIDX_best_candidate = (IDX_entry *)(pFind->m_pData1);
  }
 
  return pIDX_best_candidate;
}
void ChartCanvas::CallPopupMenu(int x, int y) {
  last_drag.x = x;
  last_drag.y = y;
  if (m_routeState) {  // creating route?
    InvokeCanvasMenu(x, y, SELTYPE_ROUTECREATE);
    return;
  }
 
  int seltype = PrepareContextSelections(m_cursor_lat, m_cursor_lon);
 
  // If tide or current point is selected, then show the TC dialog immediately
  // without context menu
  if (SELTYPE_CURRENTPOINT == seltype) {
    DrawTCWindow(x, y, (void *)m_pIDXCandidate);
    Refresh(false);
    return;
  }
 
  if (SELTYPE_TIDEPOINT == seltype) {
    DrawTCWindow(x, y, (void *)m_pIDXCandidate);
    Refresh(false);
    return;
  }
 
  InvokeCanvasMenu(x, y, seltype);
 
  // Clean up if not deleted in InvokeCanvasMenu
  if (m_pSelectedRoute && g_pRouteMan->IsRouteValid(m_pSelectedRoute)) {
    m_pSelectedRoute->m_bRtIsSelected = false;
  }
 
  m_pSelectedRoute = NULL;
 
  if (m_pFoundRoutePoint) {
    if (pSelect->IsSelectableRoutePointValid(m_pFoundRoutePoint))
      m_pFoundRoutePoint->m_bPtIsSelected = false;
  }
  m_pFoundRoutePoint = NULL;
 
  Refresh(true);
  // Refresh(false);  // needed for MSW, not GTK  Why??
}
 
bool ChartCanvas::MouseEventProcessObjects(wxMouseEvent &event) {
  // For now just bail out completely if the point clicked is not on the chart
  if (std::isnan(m_cursor_lat)) return false;
 
  //          Mouse Clicks
  bool ret = false;  // return true if processed
 
  int x, y, mx, my;
  event.GetPosition(&x, &y);
  mx = x;
  my = y;
 
  //    Calculate meaningful SelectRadius
  float SelectRadius;
  SelectRadius = g_Platform->GetSelectRadiusPix() /
                 (m_true_scale_ppm * 1852 * 60);  // Degrees, approximately
 
  // We start with Double Click processing. The first left click just starts a
  // timer and is remembered, then we actually do something if there is a
  // LeftDClick. If there is, the two single clicks are ignored.
 
  if (event.LeftDClick() && (cursor_region == CENTER)) {
    m_DoubleClickTimer->Start();
    singleClickEventIsValid = false;
 
    double zlat, zlon;
    GetCanvasPixPoint(x * g_current_monitor_dip_px_ratio,
                      y * g_current_monitor_dip_px_ratio, zlat, zlon);
 
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    if (m_bShowAIS) {
      SelectItem *pFindAIS;
      pFindAIS = pSelectAIS->FindSelection(ctx, zlat, zlon, SELTYPE_AISTARGET);
 
      if (pFindAIS) {
        m_FoundAIS_MMSI = pFindAIS->GetUserData();
        if (g_pAIS->Get_Target_Data_From_MMSI(m_FoundAIS_MMSI)) {
          ShowAISTargetQueryDialog(this, m_FoundAIS_MMSI);
        }
        return true;
      }
    }
 
    SelectableItemList rpSelList =
        pSelect->FindSelectionList(ctx, zlat, zlon, SELTYPE_ROUTEPOINT);
    bool b_onRPtarget = false;
    for (SelectItem *pFind : rpSelList) {
      RoutePoint *frp = (RoutePoint *)pFind->m_pData1;
      if (m_pRoutePointEditTarget && (frp == m_pRoutePointEditTarget)) {
        b_onRPtarget = true;
        break;
      }
    }
 
    //      Double tap with selected RoutePoint or Mark or Track or AISTarget
 
    // Get and honor the plugin API ContextMenuMask
    std::unique_ptr<HostApi> host_api = GetHostApi();
    auto *api_121 = dynamic_cast<HostApi121 *>(host_api.get());
 
    if (m_pRoutePointEditTarget) {
      if (b_onRPtarget) {
        if ((api_121->GetContextMenuMask() &
             api_121->kContextMenuDisableWaypoint))
          return true;
        ShowMarkPropertiesDialog(m_pRoutePointEditTarget);
        return true;
      } else {
        m_pRoutePointEditTarget->m_bRPIsBeingEdited = false;
        m_pRoutePointEditTarget->m_bPtIsSelected = false;
        if (g_btouch)
          RoutePointGui(*m_pRoutePointEditTarget).EnableDragHandle(false);
        wxRect wp_rect;
        RoutePointGui(*m_pRoutePointEditTarget)
            .CalculateDCRect(m_dc_route, this, &wp_rect);
        m_pRoutePointEditTarget = NULL;  // cancel selection
        RefreshRect(wp_rect, true);
        return true;
      }
    } else {
      auto node = rpSelList.begin();
      if (node != rpSelList.end()) {
        SelectItem *pFind = *node;
        RoutePoint *frp = (RoutePoint *)pFind->m_pData1;
        if (frp) {
          wxArrayPtrVoid *proute_array =
              g_pRouteMan->GetRouteArrayContaining(frp);
 
          // Use route array (if any) to determine actual visibility for this
          // point
          bool brp_viz = false;
          if (proute_array) {
            for (unsigned int ir = 0; ir < proute_array->GetCount(); ir++) {
              Route *pr = (Route *)proute_array->Item(ir);
              if (pr->IsVisible()) {
                brp_viz = true;
                break;
              }
            }
            delete proute_array;
            if (!brp_viz &&
                frp->IsShared())  // is not visible as part of route, but
                                  // still exists as a waypoint
              brp_viz = frp->IsVisible();  // so treat as isolated point
          } else
            brp_viz = frp->IsVisible();  // isolated point
 
          if (brp_viz) {
            if ((api_121->GetContextMenuMask() &
                 api_121->kContextMenuDisableWaypoint))
              return true;
 
            ShowMarkPropertiesDialog(frp);
            return true;
          }
        }
      }
    }
 
    SelectItem *cursorItem;
 
    cursorItem = pSelect->FindSelection(ctx, zlat, zlon, SELTYPE_ROUTESEGMENT);
    if (cursorItem) {
      if ((api_121->GetContextMenuMask() & api_121->kContextMenuDisableRoute))
        return true;
      Route *pr = (Route *)cursorItem->m_pData3;
      if (pr->IsVisible()) {
        ShowRoutePropertiesDialog(_("Route Properties"), pr);
        return true;
      }
    }
 
    cursorItem = pSelect->FindSelection(ctx, zlat, zlon, SELTYPE_TRACKSEGMENT);
    if (cursorItem) {
      if ((api_121->GetContextMenuMask() & api_121->kContextMenuDisableTrack))
        return true;
      Track *pt = (Track *)cursorItem->m_pData3;
      if (pt->IsVisible()) {
        ShowTrackPropertiesDialog(pt);
        return true;
      }
    }
 
    //  Tide and current points
    SelectItem *pFindCurrent = NULL;
    SelectItem *pFindTide = NULL;
 
    if (m_bShowCurrent) {  // look for current stations
      pFindCurrent =
          pSelectTC->FindSelection(ctx, zlat, zlon, SELTYPE_CURRENTPOINT);
      if (pFindCurrent) {
        m_pIDXCandidate = FindBestCurrentObject(zlat, zlon);
        DrawTCWindow(x, y, (void *)m_pIDXCandidate);
        Refresh(false);
        return true;
      }
    }
 
    if (m_bShowTide) {  // look for tide stations
      pFindTide = pSelectTC->FindSelection(ctx, zlat, zlon, SELTYPE_TIDEPOINT);
      if (pFindTide) {
        m_pIDXCandidate = (IDX_entry *)pFindTide->m_pData1;
        DrawTCWindow(x, y, (void *)m_pIDXCandidate);
        Refresh(false);
        return true;
      }
    }
 
    // Found no object to act on, so show chart info.
    ShowObjectQueryWindow(x, y, zlat, zlon);
    return true;
  }
 
  if (event.LeftDown()) {
    //  This really should not be needed, but....
    //  on Windows, when using wxAUIManager, sometimes the focus is lost
    //  when clicking into another pane, e.g.the AIS target list, and then back
    //  to this pane. Oddly, some mouse events are not lost, however.  Like this
    //  one....
    SetFocus();
 
    last_drag.x = mx;
    last_drag.y = my;
    leftIsDown = true;
 
    if (!g_btouch) {
      if (m_routeState)  // creating route?
      {
        double rlat, rlon;
        bool appending = false;
        bool inserting = false;
        Route *tail = 0;
 
        SetCursor(*pCursorPencil);
        rlat = m_cursor_lat;
        rlon = m_cursor_lon;
 
        m_bRouteEditing = true;
 
        if (m_routeState == 1) {
          m_pMouseRoute = new Route();
          NavObj_dB::GetInstance().InsertRoute(m_pMouseRoute);
          pRouteList->push_back(m_pMouseRoute);
          r_rband.x = x;
          r_rband.y = y;
        }
 
        //    Check to see if there is a nearby point which may be reused
        RoutePoint *pMousePoint = NULL;
 
        //    Calculate meaningful SelectRadius
        double nearby_radius_meters =
            g_Platform->GetSelectRadiusPix() / m_true_scale_ppm;
 
        RoutePoint *pNearbyPoint =
            pWayPointMan->GetNearbyWaypoint(rlat, rlon, nearby_radius_meters);
        if (pNearbyPoint && (pNearbyPoint != m_prev_pMousePoint) &&
            !pNearbyPoint->m_bIsInLayer && pNearbyPoint->IsVisible()) {
          wxArrayPtrVoid *proute_array =
              g_pRouteMan->GetRouteArrayContaining(pNearbyPoint);
 
          // Use route array (if any) to determine actual visibility for this
          // point
          bool brp_viz = false;
          if (proute_array) {
            for (unsigned int ir = 0; ir < proute_array->GetCount(); ir++) {
              Route *pr = (Route *)proute_array->Item(ir);
              if (pr->IsVisible()) {
                brp_viz = true;
                break;
              }
            }
            delete proute_array;
            if (!brp_viz &&
                pNearbyPoint->IsShared())  // is not visible as part of route,
                                           // but still exists as a waypoint
              brp_viz =
                  pNearbyPoint->IsVisible();  // so treat as isolated point
          } else
            brp_viz = pNearbyPoint->IsVisible();  // isolated point
 
          if (brp_viz) {
            wxString msg = _("Use nearby waypoint?");
            // Don't add a mark without name to the route. Name it if needed
            const bool noname(pNearbyPoint->GetName() == "");
            if (noname) {
              msg =
                  _("Use nearby nameless waypoint and name it M with"
                    " a unique number?");
            }
            // Avoid route finish on focus change for message dialog
            m_FinishRouteOnKillFocus = false;
            int dlg_return =
                OCPNMessageBox(this, msg, _("OpenCPN Route Create"),
                               (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
            m_FinishRouteOnKillFocus = true;
            if (dlg_return == wxID_YES) {
              if (noname) {
                if (m_pMouseRoute) {
                  int last_wp_num = m_pMouseRoute->GetnPoints();
                  // AP-ECRMB will truncate to 6 characters
                  wxString guid_short = m_pMouseRoute->GetGUID().Left(2);
                  wxString wp_name = wxString::Format(
                      "M%002i-%s", last_wp_num + 1, guid_short);
                  pNearbyPoint->SetName(wp_name);
                } else
                  pNearbyPoint->SetName("WPXX");
              }
              pMousePoint = pNearbyPoint;
 
              // Using existing waypoint, so nothing to delete for undo.
              if (m_routeState > 1)
                undo->BeforeUndoableAction(Undo_AppendWaypoint, pMousePoint,
                                           Undo_HasParent, NULL);
 
              tail =
                  g_pRouteMan->FindVisibleRouteContainingWaypoint(pMousePoint);
              bool procede = false;
              if (tail) {
                procede = true;
                // if (pMousePoint == tail->GetLastPoint()) procede = false;
                if (m_routeState > 1 && m_pMouseRoute && tail == m_pMouseRoute)
                  procede = false;
              }
 
              if (procede) {
                int dlg_return;
                m_FinishRouteOnKillFocus = false;
                if (m_routeState ==
                    1) {  // first point in new route, preceeding route to be
                          // added?  Not touch case
 
                  wxString dmsg =
                      _("Insert first part of this route in the new route?");
                  if (tail->GetIndexOf(pMousePoint) ==
                      tail->GetnPoints())  // Starting on last point of another
                                           // route?
                    dmsg = _("Insert this route in the new route?");
 
                  if (tail->GetIndexOf(pMousePoint) != 1) {  // Anything to do?
                    dlg_return = OCPNMessageBox(
                        this, dmsg, _("OpenCPN Route Create"),
                        (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                    m_FinishRouteOnKillFocus = true;
 
                    if (dlg_return == wxID_YES) {
                      inserting = true;  // part of the other route will be
                                         // preceeding the new route
                    }
                  }
                } else {
                  wxString dmsg =
                      _("Append last part of this route to the new route?");
                  if (tail->GetIndexOf(pMousePoint) == 1)
                    dmsg = _(
                        "Append this route to the new route?");  // Picking the
                                                                 // first point
                                                                 // of another
                                                                 // route?
 
                  if (tail->GetLastPoint() != pMousePoint) {  // Anything to do?
                    dlg_return = OCPNMessageBox(
                        this, dmsg, _("OpenCPN Route Create"),
                        (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                    m_FinishRouteOnKillFocus = true;
 
                    if (dlg_return == wxID_YES) {
                      appending = true;  // part of the other route will be
                                         // appended to the new route
                    }
                  }
                }
              }
 
              // check all other routes to see if this point appears in any
              // other route If it appears in NO other route, then it should e
              // considered an isolated mark
              if (!FindRouteContainingWaypoint(pMousePoint))
                pMousePoint->SetShared(true);
            }
          }
        }
 
        if (NULL == pMousePoint) {  // need a new point
          pMousePoint = new RoutePoint(rlat, rlon, g_default_routepoint_icon,
                                       "", wxEmptyString);
          pMousePoint->SetNameShown(false);
 
          // pConfig->AddNewWayPoint(pMousePoint, -1);  // use auto next num
 
          pSelect->AddSelectableRoutePoint(rlat, rlon, pMousePoint);
 
          if (m_routeState > 1)
            undo->BeforeUndoableAction(Undo_AppendWaypoint, pMousePoint,
                                       Undo_IsOrphanded, NULL);
        }
 
        if (m_pMouseRoute) {
          if (m_routeState == 1) {
            // First point in the route.
            m_pMouseRoute->AddPoint(pMousePoint);
            // NavObj_dB::GetInstance().UpdateRoute(m_pMouseRoute);
          } else {
            if (m_pMouseRoute->m_NextLegGreatCircle) {
              double rhumbBearing, rhumbDist, gcBearing, gcDist;
              DistanceBearingMercator(rlat, rlon, m_prev_rlat, m_prev_rlon,
                                      &rhumbBearing, &rhumbDist);
              Geodesic::GreatCircleDistBear(m_prev_rlon, m_prev_rlat, rlon,
                                            rlat, &gcDist, &gcBearing, NULL);
              double gcDistNM = gcDist / 1852.0;
 
              // Empirically found expression to get reasonable route segments.
              int segmentCount = (3.0 + (rhumbDist - gcDistNM)) /
                                 pow(rhumbDist - gcDistNM - 1, 0.5);
 
              wxString msg;
              msg << _("For this leg the Great Circle route is ")
                  << FormatDistanceAdaptive(rhumbDist - gcDistNM)
                  << _(" shorter than rhumbline.\n\n")
                  << _("Would you like include the Great Circle routing points "
                       "for this leg?");
 
              m_FinishRouteOnKillFocus = false;
              m_disable_edge_pan = true;  // This helps on OS X if MessageBox
                                          // does not fully capture mouse
 
              int answer = OCPNMessageBox(this, msg, _("OpenCPN Route Create"),
                                          wxYES_NO | wxNO_DEFAULT);
 
              m_disable_edge_pan = false;
              m_FinishRouteOnKillFocus = true;
 
              if (answer == wxID_YES) {
                RoutePoint *gcPoint;
                RoutePoint *prevGcPoint = m_prev_pMousePoint;
                wxRealPoint gcCoord;
 
                for (int i = 1; i <= segmentCount; i++) {
                  double fraction = (double)i * (1.0 / (double)segmentCount);
                  Geodesic::GreatCircleTravel(m_prev_rlon, m_prev_rlat,
                                              gcDist * fraction, gcBearing,
                                              &gcCoord.x, &gcCoord.y, NULL);
 
                  if (i < segmentCount) {
                    gcPoint = new RoutePoint(gcCoord.y, gcCoord.x, "xmblue", "",
                                             wxEmptyString);
                    gcPoint->SetNameShown(false);
                    // pConfig->AddNewWayPoint(gcPoint, -1);
                    NavObj_dB::GetInstance().InsertRoutePoint(gcPoint);
 
                    pSelect->AddSelectableRoutePoint(gcCoord.y, gcCoord.x,
                                                     gcPoint);
                  } else {
                    gcPoint = pMousePoint;  // Last point, previously exsisting!
                  }
 
                  m_pMouseRoute->AddPoint(gcPoint);
                  pSelect->AddSelectableRouteSegment(
                      prevGcPoint->m_lat, prevGcPoint->m_lon, gcPoint->m_lat,
                      gcPoint->m_lon, prevGcPoint, gcPoint, m_pMouseRoute);
                  prevGcPoint = gcPoint;
                }
 
                undo->CancelUndoableAction(true);
 
              } else {
                m_pMouseRoute->AddPoint(pMousePoint);
                pSelect->AddSelectableRouteSegment(
                    m_prev_rlat, m_prev_rlon, rlat, rlon, m_prev_pMousePoint,
                    pMousePoint, m_pMouseRoute);
                undo->AfterUndoableAction(m_pMouseRoute);
              }
            } else {
              // Ordinary rhumblinesegment.
              m_pMouseRoute->AddPoint(pMousePoint);
              pSelect->AddSelectableRouteSegment(m_prev_rlat, m_prev_rlon, rlat,
                                                 rlon, m_prev_pMousePoint,
                                                 pMousePoint, m_pMouseRoute);
              undo->AfterUndoableAction(m_pMouseRoute);
            }
          }
        }
        m_prev_rlat = rlat;
        m_prev_rlon = rlon;
        m_prev_pMousePoint = pMousePoint;
        if (m_pMouseRoute)
          m_pMouseRoute->m_lastMousePointIndex = m_pMouseRoute->GetnPoints();
 
        m_routeState++;
 
        if (appending ||
            inserting) {  // Appending a route or making a new route
          int connect = tail->GetIndexOf(pMousePoint);
          if (connect == 1) {
            inserting = false;  // there is nothing to insert
            appending = true;   // so append
          }
          int length = tail->GetnPoints();
 
          int i;
          int start, stop;
          if (appending) {
            start = connect + 1;
            stop = length;
          } else {  // inserting
            start = 1;
            stop = connect;
            m_pMouseRoute->RemovePoint(
                m_pMouseRoute
                    ->GetLastPoint());  // Remove the first and only point
          }
          for (i = start; i <= stop; i++) {
            m_pMouseRoute->AddPointAndSegment(tail->GetPoint(i), false);
            if (m_pMouseRoute)
              m_pMouseRoute->m_lastMousePointIndex =
                  m_pMouseRoute->GetnPoints();
            m_routeState++;
            gFrame->RefreshAllCanvas();
            ret = true;
          }
          m_prev_rlat =
              m_pMouseRoute->GetPoint(m_pMouseRoute->GetnPoints())->m_lat;
          m_prev_rlon =
              m_pMouseRoute->GetPoint(m_pMouseRoute->GetnPoints())->m_lon;
          m_pMouseRoute->FinalizeForRendering();
        }
        gFrame->RefreshAllCanvas();
        ret = true;
      }
 
      else if (m_bMeasure_Active && (m_nMeasureState >= 1))  // measure tool?
      {
        SetCursor(*pCursorPencil);
 
        if (!m_pMeasureRoute) {
          m_pMeasureRoute = new Route();
          pRouteList->push_back(m_pMeasureRoute);
        }
 
        if (m_nMeasureState == 1) {
          r_rband.x = x;
          r_rband.y = y;
        }
 
        RoutePoint *pMousePoint =
            new RoutePoint(m_cursor_lat, m_cursor_lon, wxString("circle"),
                           wxEmptyString, wxEmptyString);
        pMousePoint->m_bShowName = false;
        pMousePoint->SetShowWaypointRangeRings(false);
 
        m_pMeasureRoute->AddPoint(pMousePoint);
 
        m_prev_rlat = m_cursor_lat;
        m_prev_rlon = m_cursor_lon;
        m_prev_pMousePoint = pMousePoint;
        m_pMeasureRoute->m_lastMousePointIndex = m_pMeasureRoute->GetnPoints();
 
        m_nMeasureState++;
        gFrame->RefreshAllCanvas();
        ret = true;
      }
 
      else {
        FindRoutePointsAtCursor(SelectRadius, true);  // Not creating Route
      }
    }  // !g_btouch
    else {  // g_btouch
      m_last_touch_down_pos = event.GetPosition();
 
      if ((m_bMeasure_Active && m_nMeasureState) || (m_routeState)) {
        // if near screen edge, pan with injection
        //                if( CheckEdgePan( x, y, true, 5, 10 ) ) {
        //                    return;
        //                }
      }
    }
 
    if (ret) return true;
  }
 
  if (event.Dragging()) {
    // in touch screen mode ensure the finger/cursor is on the selected point's
    // radius to allow dragging
    SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
    if (g_btouch) {
      if (m_pRoutePointEditTarget && !m_bIsInRadius) {
        SelectItem *pFind = NULL;
        SelectableItemList SelList = pSelect->FindSelectionList(
            ctx, m_cursor_lat, m_cursor_lon, SELTYPE_ROUTEPOINT);
        for (SelectItem *pFind : SelList) {
          RoutePoint *frp = (RoutePoint *)pFind->m_pData1;
          if (m_pRoutePointEditTarget == frp) m_bIsInRadius = true;
        }
      }
 
      // Check for use of dragHandle
      if (m_pRoutePointEditTarget &&
          m_pRoutePointEditTarget->IsDragHandleEnabled()) {
        SelectItem *pFind = NULL;
        SelectableItemList SelList = pSelect->FindSelectionList(
            ctx, m_cursor_lat, m_cursor_lon, SELTYPE_DRAGHANDLE);
        for (SelectItem *pFind : SelList) {
          RoutePoint *frp = (RoutePoint *)pFind->m_pData1;
          if (m_pRoutePointEditTarget == frp) {
            m_bIsInRadius = true;
            break;
          }
        }
 
        if (!m_dragoffsetSet) {
          RoutePointGui(*m_pRoutePointEditTarget)
              .PresetDragOffset(this, mouse_x, mouse_y);
          m_dragoffsetSet = true;
        }
      }
    }
 
    if (m_bRouteEditing && m_pRoutePointEditTarget) {
      bool DraggingAllowed = g_btouch ? m_bIsInRadius : true;
 
      if (NULL == g_pMarkInfoDialog) {
        if (g_bWayPointPreventDragging) DraggingAllowed = false;
      } else if (!g_pMarkInfoDialog->IsShown() && g_bWayPointPreventDragging)
        DraggingAllowed = false;
 
      if (m_pRoutePointEditTarget &&
          (m_pRoutePointEditTarget->GetIconName() == "mob"))
        DraggingAllowed = false;
 
      if (m_pRoutePointEditTarget->m_bIsInLayer) DraggingAllowed = false;
 
      if (DraggingAllowed) {
        if (!undo->InUndoableAction()) {
          undo->BeforeUndoableAction(Undo_MoveWaypoint, m_pRoutePointEditTarget,
                                     Undo_NeedsCopy, m_pFoundPoint);
        }
 
        // Get the update rectangle for the union of the un-edited routes
        wxRect pre_rect;
 
        if (!g_bopengl && m_pEditRouteArray) {
          for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount(); ir++) {
            Route *pr = (Route *)m_pEditRouteArray->Item(ir);
            //      Need to validate route pointer
            //      Route may be gone due to drgging close to ownship with
            //      "Delete On Arrival" state set, as in the case of
            //      navigating to an isolated waypoint on a temporary route
            if (g_pRouteMan->IsRouteValid(pr)) {
              wxRect route_rect;
              RouteGui(*pr).CalculateDCRect(m_dc_route, this, &route_rect);
              pre_rect.Union(route_rect);
            }
          }
        }
 
        double new_cursor_lat = m_cursor_lat;
        double new_cursor_lon = m_cursor_lon;
 
        if (CheckEdgePan(x, y, true, 5, 2))
          GetCanvasPixPoint(x, y, new_cursor_lat, new_cursor_lon);
 
        // update the point itself
        if (g_btouch) {
          // m_pRoutePointEditTarget->SetPointFromDraghandlePoint(VPoint,
          // new_cursor_lat, new_cursor_lon);
          RoutePointGui(*m_pRoutePointEditTarget)
              .SetPointFromDraghandlePoint(this, mouse_x, mouse_y);
          // update the Drag Handle entry in the pSelect list
          pSelect->ModifySelectablePoint(new_cursor_lat, new_cursor_lon,
                                         m_pRoutePointEditTarget,
                                         SELTYPE_DRAGHANDLE);
          m_pFoundPoint->m_slat =
              m_pRoutePointEditTarget->m_lat;  // update the SelectList entry
          m_pFoundPoint->m_slon = m_pRoutePointEditTarget->m_lon;
        } else {
          m_pRoutePointEditTarget->m_lat =
              new_cursor_lat;  // update the RoutePoint entry
          m_pRoutePointEditTarget->m_lon = new_cursor_lon;
          m_pRoutePointEditTarget->m_wpBBox.Invalidate();
          m_pFoundPoint->m_slat =
              new_cursor_lat;  // update the SelectList entry
          m_pFoundPoint->m_slon = new_cursor_lon;
        }
 
        //    Update the MarkProperties Dialog, if currently shown
        if ((NULL != g_pMarkInfoDialog) && (g_pMarkInfoDialog->IsShown())) {
          if (m_pRoutePointEditTarget == g_pMarkInfoDialog->GetRoutePoint())
            g_pMarkInfoDialog->UpdateProperties(true);
        }
 
        if (g_bopengl) {
          // InvalidateGL();
          Refresh(false);
        } else {
          // Get the update rectangle for the edited route
          wxRect post_rect;
 
          if (m_pEditRouteArray) {
            for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount();
                 ir++) {
              Route *pr = (Route *)m_pEditRouteArray->Item(ir);
              if (g_pRouteMan->IsRouteValid(pr)) {
                wxRect route_rect;
                RouteGui(*pr).CalculateDCRect(m_dc_route, this, &route_rect);
                post_rect.Union(route_rect);
              }
            }
          }
 
          //    Invalidate the union region
          pre_rect.Union(post_rect);
          RefreshRect(pre_rect, false);
        }
        gFrame->RefreshCanvasOther(this);
        m_bRoutePoinDragging = true;
      }
      ret = true;
    }  // if Route Editing
 
    else if (m_bMarkEditing && m_pRoutePointEditTarget) {
      bool DraggingAllowed = g_btouch ? m_bIsInRadius : true;
 
      if (NULL == g_pMarkInfoDialog) {
        if (g_bWayPointPreventDragging) DraggingAllowed = false;
      } else if (!g_pMarkInfoDialog->IsShown() && g_bWayPointPreventDragging)
        DraggingAllowed = false;
 
      if (m_pRoutePointEditTarget &&
          (m_pRoutePointEditTarget->GetIconName() == "mob"))
        DraggingAllowed = false;
 
      if (m_pRoutePointEditTarget->m_bIsInLayer) DraggingAllowed = false;
 
      if (DraggingAllowed) {
        if (!undo->InUndoableAction()) {
          undo->BeforeUndoableAction(Undo_MoveWaypoint, m_pRoutePointEditTarget,
                                     Undo_NeedsCopy, m_pFoundPoint);
        }
 
        //      The mark may be an anchorwatch
        double lpp1 = 0.;
        double lpp2 = 0.;
        double lppmax;
 
        if (pAnchorWatchPoint1 == m_pRoutePointEditTarget) {
          lpp1 = fabs(GetAnchorWatchRadiusPixels(pAnchorWatchPoint1));
        }
        if (pAnchorWatchPoint2 == m_pRoutePointEditTarget) {
          lpp2 = fabs(GetAnchorWatchRadiusPixels(pAnchorWatchPoint2));
        }
        lppmax = wxMax(lpp1 + 10, lpp2 + 10);  // allow for cruft
 
        // Get the update rectangle for the un-edited mark
        wxRect pre_rect;
        if (!g_bopengl) {
          RoutePointGui(*m_pRoutePointEditTarget)
              .CalculateDCRect(m_dc_route, this, &pre_rect);
          if ((lppmax > pre_rect.width / 2) || (lppmax > pre_rect.height / 2))
            pre_rect.Inflate((int)(lppmax - (pre_rect.width / 2)),
                             (int)(lppmax - (pre_rect.height / 2)));
        }
 
        // update the point itself
        if (g_btouch) {
          //                            m_pRoutePointEditTarget->SetPointFromDraghandlePoint(VPoint,
          //                            m_cursor_lat, m_cursor_lon);
          RoutePointGui(*m_pRoutePointEditTarget)
              .SetPointFromDraghandlePoint(this, mouse_x, mouse_y);
          // update the Drag Handle entry in the pSelect list
          pSelect->ModifySelectablePoint(m_cursor_lat, m_cursor_lon,
                                         m_pRoutePointEditTarget,
                                         SELTYPE_DRAGHANDLE);
          m_pFoundPoint->m_slat =
              m_pRoutePointEditTarget->m_lat;  // update the SelectList entry
          m_pFoundPoint->m_slon = m_pRoutePointEditTarget->m_lon;
        } else {
          m_pRoutePointEditTarget->m_lat =
              m_cursor_lat;  // update the RoutePoint entry
          m_pRoutePointEditTarget->m_lon = m_cursor_lon;
          m_pRoutePointEditTarget->m_wpBBox.Invalidate();
          m_pFoundPoint->m_slat = m_cursor_lat;  // update the SelectList entry
          m_pFoundPoint->m_slon = m_cursor_lon;
        }
 
        //    Update the MarkProperties Dialog, if currently shown
        if ((NULL != g_pMarkInfoDialog) && (g_pMarkInfoDialog->IsShown())) {
          if (m_pRoutePointEditTarget == g_pMarkInfoDialog->GetRoutePoint())
            g_pMarkInfoDialog->UpdateProperties(true);
        }
 
        //    Invalidate the union region
        if (g_bopengl) {
          if (!g_btouch) InvalidateGL();
          Refresh(false);
        } else {
          // Get the update rectangle for the edited mark
          wxRect post_rect;
          RoutePointGui(*m_pRoutePointEditTarget)
              .CalculateDCRect(m_dc_route, this, &post_rect);
          if ((lppmax > post_rect.width / 2) || (lppmax > post_rect.height / 2))
            post_rect.Inflate((int)(lppmax - (post_rect.width / 2)),
                              (int)(lppmax - (post_rect.height / 2)));
 
          //    Invalidate the union region
          pre_rect.Union(post_rect);
          RefreshRect(pre_rect, false);
        }
        gFrame->RefreshCanvasOther(this);
        m_bRoutePoinDragging = true;
      }
      ret = g_btouch ? m_bRoutePoinDragging : true;
    }
 
    if (ret) return true;
  }  // dragging
 
  if (event.LeftUp()) {
    bool b_startedit_route = false;
    m_dragoffsetSet = false;
 
    if (g_btouch) {
      m_bChartDragging = false;
      m_bIsInRadius = false;
 
      if (m_routeState)  // creating route?
      {
        if (m_ignore_next_leftup) {
          m_ignore_next_leftup = false;
          return false;
        }
 
        if (m_bedge_pan) {
          m_bedge_pan = false;
          return false;
        }
 
        double rlat, rlon;
        bool appending = false;
        bool inserting = false;
        Route *tail = 0;
 
        rlat = m_cursor_lat;
        rlon = m_cursor_lon;
 
        if (m_pRoutePointEditTarget) {
          m_pRoutePointEditTarget->m_bRPIsBeingEdited = false;
          m_pRoutePointEditTarget->m_bPtIsSelected = false;
          if (!g_bopengl) {
            wxRect wp_rect;
            RoutePointGui(*m_pRoutePointEditTarget)
                .CalculateDCRect(m_dc_route, this, &wp_rect);
            RefreshRect(wp_rect, true);
          }
          m_pRoutePointEditTarget = NULL;
        }
        m_bRouteEditing = true;
 
        if (m_routeState == 1) {
          m_pMouseRoute = new Route();
          m_pMouseRoute->SetHiLite(50);
          pRouteList->push_back(m_pMouseRoute);
          r_rband.x = x;
          r_rband.y = y;
          NavObj_dB::GetInstance().InsertRoute(m_pMouseRoute);
        }
 
        //    Check to see if there is a nearby point which may be reused
        RoutePoint *pMousePoint = NULL;
 
        //    Calculate meaningful SelectRadius
        double nearby_radius_meters =
            g_Platform->GetSelectRadiusPix() / m_true_scale_ppm;
 
        RoutePoint *pNearbyPoint =
            pWayPointMan->GetNearbyWaypoint(rlat, rlon, nearby_radius_meters);
        if (pNearbyPoint && (pNearbyPoint != m_prev_pMousePoint) &&
            !pNearbyPoint->m_bIsInLayer && pNearbyPoint->IsVisible()) {
          int dlg_return;
#ifndef __WXOSX__
          m_FinishRouteOnKillFocus =
              false;  // Avoid route finish on focus change for message dialog
          dlg_return = OCPNMessageBox(
              this, _("Use nearby waypoint?"), _("OpenCPN Route Create"),
              (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
          m_FinishRouteOnKillFocus = true;
#else
          dlg_return = wxID_YES;
#endif
          if (dlg_return == wxID_YES) {
            pMousePoint = pNearbyPoint;
 
            // Using existing waypoint, so nothing to delete for undo.
            if (m_routeState > 1)
              undo->BeforeUndoableAction(Undo_AppendWaypoint, pMousePoint,
                                         Undo_HasParent, NULL);
            tail = g_pRouteMan->FindVisibleRouteContainingWaypoint(pMousePoint);
 
            bool procede = false;
            if (tail) {
              procede = true;
              // if (pMousePoint == tail->GetLastPoint()) procede = false;
              if (m_routeState > 1 && m_pMouseRoute && tail == m_pMouseRoute)
                procede = false;
            }
 
            if (procede) {
              int dlg_return;
              m_FinishRouteOnKillFocus = false;
              if (m_routeState == 1) {  // first point in new route, preceeding
                                        // route to be added?  touch case
 
                wxString dmsg =
                    _("Insert first part of this route in the new route?");
                if (tail->GetIndexOf(pMousePoint) ==
                    tail->GetnPoints())  // Starting on last point of another
                                         // route?
                  dmsg = _("Insert this route in the new route?");
 
                if (tail->GetIndexOf(pMousePoint) != 1) {  // Anything to do?
                  dlg_return =
                      OCPNMessageBox(this, dmsg, _("OpenCPN Route Create"),
                                     (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                  m_FinishRouteOnKillFocus = true;
 
                  if (dlg_return == wxID_YES) {
                    inserting = true;  // part of the other route will be
                                       // preceeding the new route
                  }
                }
              } else {
                wxString dmsg =
                    _("Append last part of this route to the new route?");
                if (tail->GetIndexOf(pMousePoint) == 1)
                  dmsg = _(
                      "Append this route to the new route?");  // Picking the
                                                               // first point of
                                                               // another route?
 
                if (tail->GetLastPoint() != pMousePoint) {  // Anything to do?
                  dlg_return =
                      OCPNMessageBox(this, dmsg, _("OpenCPN Route Create"),
                                     (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                  m_FinishRouteOnKillFocus = true;
 
                  if (dlg_return == wxID_YES) {
                    appending = true;  // part of the other route will be
                                       // appended to the new route
                  }
                }
              }
            }
 
            // check all other routes to see if this point appears in any other
            // route If it appears in NO other route, then it should e
            // considered an isolated mark
            if (!FindRouteContainingWaypoint(pMousePoint))
              pMousePoint->SetShared(true);
          }
        }
 
        if (NULL == pMousePoint) {  // need a new point
          pMousePoint = new RoutePoint(rlat, rlon, g_default_routepoint_icon,
                                       "", wxEmptyString);
          pMousePoint->SetNameShown(false);
 
          pSelect->AddSelectableRoutePoint(rlat, rlon, pMousePoint);
 
          if (m_routeState > 1)
            undo->BeforeUndoableAction(Undo_AppendWaypoint, pMousePoint,
                                       Undo_IsOrphanded, NULL);
        }
 
        if (m_routeState == 1) {
          // First point in the route.
          m_pMouseRoute->AddPoint(pMousePoint);
          NavObj_dB::GetInstance().UpdateRoute(m_pMouseRoute);
 
        } else {
          if (m_pMouseRoute->m_NextLegGreatCircle) {
            double rhumbBearing, rhumbDist, gcBearing, gcDist;
            DistanceBearingMercator(rlat, rlon, m_prev_rlat, m_prev_rlon,
                                    &rhumbBearing, &rhumbDist);
            Geodesic::GreatCircleDistBear(m_prev_rlon, m_prev_rlat, rlon, rlat,
                                          &gcDist, &gcBearing, NULL);
            double gcDistNM = gcDist / 1852.0;
 
            // Empirically found expression to get reasonable route segments.
            int segmentCount = (3.0 + (rhumbDist - gcDistNM)) /
                               pow(rhumbDist - gcDistNM - 1, 0.5);
 
            wxString msg;
            msg << _("For this leg the Great Circle route is ")
                << FormatDistanceAdaptive(rhumbDist - gcDistNM)
                << _(" shorter than rhumbline.\n\n")
                << _("Would you like include the Great Circle routing points "
                     "for this leg?");
 
#ifndef __WXOSX__
            m_FinishRouteOnKillFocus = false;
            int answer = OCPNMessageBox(this, msg, _("OpenCPN Route Create"),
                                        wxYES_NO | wxNO_DEFAULT);
            m_FinishRouteOnKillFocus = true;
#else
            int answer = wxID_NO;
#endif
 
            if (answer == wxID_YES) {
              RoutePoint *gcPoint;
              RoutePoint *prevGcPoint = m_prev_pMousePoint;
              wxRealPoint gcCoord;
 
              for (int i = 1; i <= segmentCount; i++) {
                double fraction = (double)i * (1.0 / (double)segmentCount);
                Geodesic::GreatCircleTravel(m_prev_rlon, m_prev_rlat,
                                            gcDist * fraction, gcBearing,
                                            &gcCoord.x, &gcCoord.y, NULL);
 
                if (i < segmentCount) {
                  gcPoint = new RoutePoint(gcCoord.y, gcCoord.x, "xmblue", "",
                                           wxEmptyString);
                  gcPoint->SetNameShown(false);
                  pSelect->AddSelectableRoutePoint(gcCoord.y, gcCoord.x,
                                                   gcPoint);
                } else {
                  gcPoint = pMousePoint;  // Last point, previously exsisting!
                }
 
                m_pMouseRoute->AddPoint(gcPoint);
                NavObj_dB::GetInstance().UpdateRoute(m_pMouseRoute);
 
                pSelect->AddSelectableRouteSegment(
                    prevGcPoint->m_lat, prevGcPoint->m_lon, gcPoint->m_lat,
                    gcPoint->m_lon, prevGcPoint, gcPoint, m_pMouseRoute);
                prevGcPoint = gcPoint;
              }
 
              undo->CancelUndoableAction(true);
 
            } else {
              m_pMouseRoute->AddPoint(pMousePoint);
              NavObj_dB::GetInstance().UpdateRoute(m_pMouseRoute);
              pSelect->AddSelectableRouteSegment(m_prev_rlat, m_prev_rlon, rlat,
                                                 rlon, m_prev_pMousePoint,
                                                 pMousePoint, m_pMouseRoute);
              undo->AfterUndoableAction(m_pMouseRoute);
            }
          } else {
            // Ordinary rhumblinesegment.
            m_pMouseRoute->AddPoint(pMousePoint);
            NavObj_dB::GetInstance().UpdateRoute(m_pMouseRoute);
 
            pSelect->AddSelectableRouteSegment(m_prev_rlat, m_prev_rlon, rlat,
                                               rlon, m_prev_pMousePoint,
                                               pMousePoint, m_pMouseRoute);
            undo->AfterUndoableAction(m_pMouseRoute);
          }
        }
 
        m_prev_rlat = rlat;
        m_prev_rlon = rlon;
        m_prev_pMousePoint = pMousePoint;
        m_pMouseRoute->m_lastMousePointIndex = m_pMouseRoute->GetnPoints();
 
        m_routeState++;
 
        if (appending ||
            inserting) {  // Appending a route or making a new route
          int connect = tail->GetIndexOf(pMousePoint);
          if (connect == 1) {
            inserting = false;  // there is nothing to insert
            appending = true;   // so append
          }
          int length = tail->GetnPoints();
 
          int i;
          int start, stop;
          if (appending) {
            start = connect + 1;
            stop = length;
          } else {  // inserting
            start = 1;
            stop = connect;
            m_pMouseRoute->RemovePoint(
                m_pMouseRoute
                    ->GetLastPoint());  // Remove the first and only point
          }
          for (i = start; i <= stop; i++) {
            m_pMouseRoute->AddPointAndSegment(tail->GetPoint(i), false);
            if (m_pMouseRoute)
              m_pMouseRoute->m_lastMousePointIndex =
                  m_pMouseRoute->GetnPoints();
            m_routeState++;
            gFrame->RefreshAllCanvas();
            ret = true;
          }
          m_prev_rlat =
              m_pMouseRoute->GetPoint(m_pMouseRoute->GetnPoints())->m_lat;
          m_prev_rlon =
              m_pMouseRoute->GetPoint(m_pMouseRoute->GetnPoints())->m_lon;
          m_pMouseRoute->FinalizeForRendering();
        }
 
        Refresh(true);
        ret = true;
      } else if (m_bMeasure_Active && m_nMeasureState)  // measure tool?
      {
        if (m_bedge_pan) {
          m_bedge_pan = false;
          return false;
        }
 
        if (m_ignore_next_leftup) {
          m_ignore_next_leftup = false;
          return false;
        }
 
        if (m_nMeasureState == 1) {
          m_pMeasureRoute = new Route();
          pRouteList->push_back(m_pMeasureRoute);
          r_rband.x = x;
          r_rband.y = y;
        }
 
        if (m_pMeasureRoute) {
          RoutePoint *pMousePoint =
              new RoutePoint(m_cursor_lat, m_cursor_lon, wxString("circle"),
                             wxEmptyString, wxEmptyString);
          pMousePoint->m_bShowName = false;
 
          m_pMeasureRoute->AddPoint(pMousePoint);
 
          m_prev_rlat = m_cursor_lat;
          m_prev_rlon = m_cursor_lon;
          m_prev_pMousePoint = pMousePoint;
          m_pMeasureRoute->m_lastMousePointIndex =
              m_pMeasureRoute->GetnPoints();
 
          m_nMeasureState++;
        } else {
          CancelMeasureRoute();
        }
 
        Refresh(true);
        ret = true;
      } else {
        bool bSelectAllowed = true;
        if (NULL == g_pMarkInfoDialog) {
          if (g_bWayPointPreventDragging) bSelectAllowed = false;
        } else if (!g_pMarkInfoDialog->IsShown() && g_bWayPointPreventDragging)
          bSelectAllowed = false;
 
        // Avoid accidental selection of routepoint if last touchdown started
        // a significant chart drag operation
        int significant_drag = g_Platform->GetSelectRadiusPix() * 2;
        if ((abs(m_last_touch_down_pos.x - event.GetPosition().x) >
             significant_drag) ||
            (abs(m_last_touch_down_pos.y - event.GetPosition().y) >
             significant_drag)) {
          bSelectAllowed = false;
        }
 
        /*if this left up happens at the end of a route point dragging and if
        the cursor/thumb is on the draghandle icon, not on the point iself a new
        selection will select nothing and the drag will never be ended, so the
        legs around this point never selectable. At this step we don't need a
        new selection, just keep the previoulsly selected and dragged point */
        if (m_bRoutePoinDragging) bSelectAllowed = false;
 
        if (bSelectAllowed) {
          bool b_was_editing_mark = m_bMarkEditing;
          bool b_was_editing_route = m_bRouteEditing;
          FindRoutePointsAtCursor(SelectRadius,
                                  true);  // Possibly selecting a point in a
                                          // route for later dragging
 
          /*route and a mark points in layer can't be dragged so should't be
           * selected and no draghandle icon*/
          if (m_pRoutePointEditTarget && m_pRoutePointEditTarget->m_bIsInLayer)
            m_pRoutePointEditTarget = NULL;
 
          if (!b_was_editing_route) {
            if (m_pEditRouteArray) {
              b_startedit_route = true;
 
              //  Hide the track and route rollover during route point edit, not
              //  needed, and may be confusing
              if (m_pTrackRolloverWin && m_pTrackRolloverWin->IsActive()) {
                m_pTrackRolloverWin->IsActive(false);
              }
              if (m_pRouteRolloverWin && m_pRouteRolloverWin->IsActive()) {
                m_pRouteRolloverWin->IsActive(false);
              }
 
              wxRect pre_rect;
              for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount();
                   ir++) {
                Route *pr = (Route *)m_pEditRouteArray->Item(ir);
                //      Need to validate route pointer
                //      Route may be gone due to drgging close to ownship with
                //      "Delete On Arrival" state set, as in the case of
                //      navigating to an isolated waypoint on a temporary route
                if (g_pRouteMan->IsRouteValid(pr)) {
                  //                                pr->SetHiLite(50);
                  wxRect route_rect;
                  RouteGui(*pr).CalculateDCRect(m_dc_route, this, &route_rect);
                  pre_rect.Union(route_rect);
                }
              }
              RefreshRect(pre_rect, true);
            }
          } else {
            b_startedit_route = false;
          }
 
          //  Mark editing in touch mode, left-up event.
          if (m_pRoutePointEditTarget) {
            if (b_was_editing_mark ||
                b_was_editing_route) {  // kill previous hilight
              if (m_lastRoutePointEditTarget) {
                m_lastRoutePointEditTarget->m_bRPIsBeingEdited = false;
                m_lastRoutePointEditTarget->m_bPtIsSelected = false;
                RoutePointGui(*m_lastRoutePointEditTarget)
                    .EnableDragHandle(false);
                pSelect->DeleteSelectablePoint(m_lastRoutePointEditTarget,
                                               SELTYPE_DRAGHANDLE);
              }
            }
 
            if (m_pRoutePointEditTarget) {
              m_pRoutePointEditTarget->m_bRPIsBeingEdited = true;
              m_pRoutePointEditTarget->m_bPtIsSelected = true;
              RoutePointGui(*m_pRoutePointEditTarget).EnableDragHandle(true);
              wxPoint2DDouble dragHandlePoint =
                  RoutePointGui(*m_pRoutePointEditTarget)
                      .GetDragHandlePoint(this);
              pSelect->AddSelectablePoint(
                  dragHandlePoint.m_y, dragHandlePoint.m_x,
                  m_pRoutePointEditTarget, SELTYPE_DRAGHANDLE);
            }
          } else {  // Deselect everything
            if (m_lastRoutePointEditTarget) {
              m_lastRoutePointEditTarget->m_bRPIsBeingEdited = false;
              m_lastRoutePointEditTarget->m_bPtIsSelected = false;
              RoutePointGui(*m_lastRoutePointEditTarget)
                  .EnableDragHandle(false);
              pSelect->DeleteSelectablePoint(m_lastRoutePointEditTarget,
                                             SELTYPE_DRAGHANDLE);
 
              //  Clear any routes being edited, probably orphans
              wxArrayPtrVoid *lastEditRouteArray =
                  g_pRouteMan->GetRouteArrayContaining(
                      m_lastRoutePointEditTarget);
              if (lastEditRouteArray) {
                for (unsigned int ir = 0; ir < lastEditRouteArray->GetCount();
                     ir++) {
                  Route *pr = (Route *)lastEditRouteArray->Item(ir);
                  if (g_pRouteMan->IsRouteValid(pr)) {
                    pr->m_bIsBeingEdited = false;
                  }
                }
                delete lastEditRouteArray;
              }
            }
          }
 
          //  Do the refresh
 
          if (g_bopengl) {
            InvalidateGL();
            Refresh(false);
          } else {
            if (m_lastRoutePointEditTarget) {
              wxRect wp_rect;
              RoutePointGui(*m_lastRoutePointEditTarget)
                  .CalculateDCRect(m_dc_route, this, &wp_rect);
              RefreshRect(wp_rect, true);
            }
 
            if (m_pRoutePointEditTarget) {
              wxRect wp_rect;
              RoutePointGui(*m_pRoutePointEditTarget)
                  .CalculateDCRect(m_dc_route, this, &wp_rect);
              RefreshRect(wp_rect, true);
            }
          }
        }
      }  //  bSelectAllowed
 
      //      Check to see if there is a route or AIS target under the cursor
      //      If so, start the rollover timer which creates the popup
      SelectCtx ctx(m_bShowNavobjects, GetCanvasTrueScale(), GetScaleValue());
      bool b_start_rollover = false;
      if (g_pAIS && g_pAIS->GetNumTargets() && m_bShowAIS) {
        SelectItem *pFind = pSelectAIS->FindSelection(
            ctx, m_cursor_lat, m_cursor_lon, SELTYPE_AISTARGET);
        if (pFind) b_start_rollover = true;
      }
 
      if (!b_start_rollover && !b_startedit_route) {
        SelectableItemList SelList = pSelect->FindSelectionList(
            ctx, m_cursor_lat, m_cursor_lon, SELTYPE_ROUTESEGMENT);
        for (SelectItem *pFindSel : SelList) {
          Route *pr = (Route *)pFindSel->m_pData3;  // candidate
          if (pr && pr->IsVisible()) {
            b_start_rollover = true;
            break;
          }
        }  // while
      }
 
      if (!b_start_rollover && !b_startedit_route) {
        SelectableItemList SelList = pSelect->FindSelectionList(
            ctx, m_cursor_lat, m_cursor_lon, SELTYPE_TRACKSEGMENT);
        for (SelectItem *pFindSel : SelList) {
          Track *tr = (Track *)pFindSel->m_pData3;  // candidate
          if (tr && tr->IsVisible()) {
            b_start_rollover = true;
            break;
          }
        }  // while
      }
 
      if (b_start_rollover)
        m_RolloverPopupTimer.Start(m_rollover_popup_timer_msec,
                                   wxTIMER_ONE_SHOT);
      Route *tail = 0;
      Route *current = 0;
      bool appending = false;
      bool inserting = false;
      int connect = 0;
      if (m_bRouteEditing /* && !b_startedit_route*/) {  // End of RoutePoint
                                                         // drag
        if (m_pRoutePointEditTarget) {
          // Check to see if there is a nearby point which may replace the
          // dragged one
          RoutePoint *pMousePoint = NULL;
 
          int index_last;
          if (m_bRoutePoinDragging && !m_pRoutePointEditTarget->m_bIsActive) {
            double nearby_radius_meters =
                g_Platform->GetSelectRadiusPix() / m_true_scale_ppm;
            RoutePoint *pNearbyPoint = pWayPointMan->GetOtherNearbyWaypoint(
                m_pRoutePointEditTarget->m_lat, m_pRoutePointEditTarget->m_lon,
                nearby_radius_meters, m_pRoutePointEditTarget->m_GUID);
            if (pNearbyPoint && !pNearbyPoint->m_bIsInLayer &&
                pWayPointMan->IsReallyVisible(pNearbyPoint)) {
              bool duplicate =
                  false;  // ensure we won't create duplicate point in routes
              if (m_pEditRouteArray && !pNearbyPoint->m_bIsolatedMark) {
                for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount();
                     ir++) {
                  Route *pr = (Route *)m_pEditRouteArray->Item(ir);
                  if (pr && pr->pRoutePointList) {
                    auto *list = pr->pRoutePointList;
                    auto pos =
                        std::find(list->begin(), list->end(), pNearbyPoint);
                    if (pos != list->end()) {
                      duplicate = true;
                      break;
                    }
                  }
                }
              }
 
              // Special case:
              // Allow "re-use" of a route's waypoints iff it is a simple
              // isolated route. This allows, for instance, creation of a closed
              // polygon route
              if (m_pEditRouteArray->GetCount() == 1) duplicate = false;
 
              if (!duplicate) {
                int dlg_return;
                dlg_return =
                    OCPNMessageBox(this,
                                   _("Replace this RoutePoint by the nearby "
                                     "Waypoint?"),
                                   _("OpenCPN RoutePoint change"),
                                   (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                if (dlg_return == wxID_YES) {
                  /*double confirmation if the dragged point has been manually
                   * created which can be important and could be deleted
                   * unintentionally*/
 
                  tail = g_pRouteMan->FindVisibleRouteContainingWaypoint(
                      pNearbyPoint);
                  current =
                      FindRouteContainingWaypoint(m_pRoutePointEditTarget);
 
                  if (tail && current && (tail != current)) {
                    int dlg_return1;
                    connect = tail->GetIndexOf(pNearbyPoint);
                    int index_current_route =
                        current->GetIndexOf(m_pRoutePointEditTarget);
                    index_last = current->GetIndexOf(current->GetLastPoint());
                    dlg_return1 = wxID_NO;
                    if (index_last ==
                        index_current_route) {  // we are dragging the last
                                                // point of the route
                      if (connect != tail->GetnPoints()) {  // anything to do?
 
                        wxString dmsg(
                            _("Last part of route to be appended to dragged "
                              "route?"));
                        if (connect == 1)
                          dmsg =
                              _("Full route to be appended to dragged route?");
 
                        dlg_return1 = OCPNMessageBox(
                            this, dmsg, _("OpenCPN Route Create"),
                            (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                        if (dlg_return1 == wxID_YES) {
                          appending = true;
                        }
                      }
                    } else if (index_current_route ==
                               1) {  // dragging the first point of the route
                      if (connect != 1) {  // anything to do?
 
                        wxString dmsg(
                            _("First part of route to be inserted into dragged "
                              "route?"));
                        if (connect == tail->GetnPoints())
                          dmsg = _(
                              "Full route to be inserted into dragged route?");
 
                        dlg_return1 = OCPNMessageBox(
                            this, dmsg, _("OpenCPN Route Create"),
                            (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                        if (dlg_return1 == wxID_YES) {
                          inserting = true;
                        }
                      }
                    }
                  }
 
                  if (m_pRoutePointEditTarget->IsShared()) {
                    //  dlg_return = wxID_NO;
                    dlg_return = OCPNMessageBox(
                        this,
                        _("Do you really want to delete and replace this "
                          "WayPoint") +
                            "\n" + _("which has been created manually?"),
                        ("OpenCPN RoutePoint warning"),
                        (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                  }
                }
                if (dlg_return == wxID_YES) {
                  pMousePoint = pNearbyPoint;
                  if (pMousePoint->m_bIsolatedMark) {
                    pMousePoint->SetShared(true);
                  }
                  pMousePoint->m_bIsolatedMark =
                      false;  // definitely no longer isolated
                  pMousePoint->m_bIsInRoute = true;
                }
              }
            }
          }
          if (!pMousePoint)
            pSelect->UpdateSelectableRouteSegments(m_pRoutePointEditTarget);
 
          if (m_pEditRouteArray) {
            for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount();
                 ir++) {
              Route *pr = (Route *)m_pEditRouteArray->Item(ir);
              if (g_pRouteMan->IsRouteValid(pr)) {
                if (pMousePoint) {  // remove the dragged point and insert the
                                    // nearby
                  auto *list = pr->pRoutePointList;
                  auto pos = std::find(list->begin(), list->end(),
                                       m_pRoutePointEditTarget);
 
                  pSelect->DeleteAllSelectableRoutePoints(pr);
                  pSelect->DeleteAllSelectableRouteSegments(pr);
 
                  pr->pRoutePointList->insert(pos, pMousePoint);
                  pos = std::find(list->begin(), list->end(),
                                  m_pRoutePointEditTarget);
                  pr->pRoutePointList->erase(pos);
 
                  pSelect->AddAllSelectableRouteSegments(pr);
                  pSelect->AddAllSelectableRoutePoints(pr);
                }
                pr->FinalizeForRendering();
                pr->UpdateSegmentDistances();
                if (m_bRoutePoinDragging) {
                  // pConfig->UpdateRoute(pr);
                  NavObj_dB::GetInstance().UpdateRoute(pr);
                }
              }
            }
          }
 
          //    Update the RouteProperties Dialog, if currently shown
          if (pRoutePropDialog && pRoutePropDialog->IsShown()) {
            if (m_pEditRouteArray) {
              for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount();
                   ir++) {
                Route *pr = (Route *)m_pEditRouteArray->Item(ir);
                if (g_pRouteMan->IsRouteValid(pr)) {
                  if (pRoutePropDialog->GetRoute() == pr) {
                    pRoutePropDialog->SetRouteAndUpdate(pr, true);
                  }
                  /* cannot edit track points anyway
                                                  else if ( ( NULL !=
                     pTrackPropDialog ) && ( pTrackPropDialog->IsShown() ) &&
                     pTrackPropDialog->m_pTrack == pr ) {
                                                      pTrackPropDialog->SetTrackAndUpdate(
                     pr );
                                                  }
                  */
                }
              }
            }
          }
          if (pMousePoint) {  // clear all about the dragged point
            // pConfig->DeleteWayPoint(m_pRoutePointEditTarget);
            NavObj_dB::GetInstance().DeleteRoutePoint(m_pRoutePointEditTarget);
            pWayPointMan->RemoveRoutePoint(m_pRoutePointEditTarget);
            // Hide mark properties dialog if open on the replaced point
            if ((NULL != g_pMarkInfoDialog) && (g_pMarkInfoDialog->IsShown()))
              if (m_pRoutePointEditTarget == g_pMarkInfoDialog->GetRoutePoint())
                g_pMarkInfoDialog->Hide();
 
            delete m_pRoutePointEditTarget;
            m_lastRoutePointEditTarget = NULL;
            m_pRoutePointEditTarget = NULL;
            undo->AfterUndoableAction(pMousePoint);
            undo->InvalidateUndo();
          }
        }
      }
 
      else if (m_bMarkEditing) {  // End of way point drag
        if (m_pRoutePointEditTarget)
          if (m_bRoutePoinDragging) {
            // pConfig->UpdateWayPoint(m_pRoutePointEditTarget);
            NavObj_dB::GetInstance().UpdateRoutePoint(m_pRoutePointEditTarget);
          }
      }
 
      if (m_pRoutePointEditTarget)
        undo->AfterUndoableAction(m_pRoutePointEditTarget);
 
      if (!m_pRoutePointEditTarget) {
        delete m_pEditRouteArray;
        m_pEditRouteArray = NULL;
        m_bRouteEditing = false;
      }
      m_bRoutePoinDragging = false;
 
      if (appending) {  // Appending to the route of which the last point is
                        // dragged onto another route
 
        // copy tail from connect until length to end of current after dragging
 
        int length = tail->GetnPoints();
        for (int i = connect + 1; i <= length; i++) {
          current->AddPointAndSegment(tail->GetPoint(i), false);
          if (current) current->m_lastMousePointIndex = current->GetnPoints();
          m_routeState++;
          gFrame->RefreshAllCanvas();
          ret = true;
        }
        current->FinalizeForRendering();
        current->m_bIsBeingEdited = false;
        FinishRoute();
        g_pRouteMan->DeleteRoute(tail);
      }
      if (inserting) {
        pSelect->DeleteAllSelectableRoutePoints(current);
        pSelect->DeleteAllSelectableRouteSegments(current);
        for (int i = 1; i < connect; i++) {  // numbering in the tail route
          current->InsertPointAndSegment(tail->GetPoint(i), i - 1, false);
        }
        pSelect->AddAllSelectableRouteSegments(current);
        pSelect->AddAllSelectableRoutePoints(current);
        current->FinalizeForRendering();
        current->m_bIsBeingEdited = false;
        g_pRouteMan->DeleteRoute(tail);
      }
 
      //    Update the RouteProperties Dialog, if currently shown
      if (pRoutePropDialog && pRoutePropDialog->IsShown()) {
        if (m_pEditRouteArray) {
          for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount(); ir++) {
            Route *pr = (Route *)m_pEditRouteArray->Item(ir);
            if (g_pRouteMan->IsRouteValid(pr)) {
              if (pRoutePropDialog->GetRoute() == pr) {
                pRoutePropDialog->SetRouteAndUpdate(pr, true);
              }
            }
          }
        }
      }
 
    }  // g_btouch
 
    else {                    // !g_btouch
      if (m_bRouteEditing) {  // End of RoutePoint drag
        Route *tail = 0;
        Route *current = 0;
        bool appending = false;
        bool inserting = false;
        int connect = 0;
        int index_last;
        if (m_pRoutePointEditTarget) {
          m_pRoutePointEditTarget->m_bBlink = false;
          // Check to see if there is a nearby point which may replace the
          // dragged one
          RoutePoint *pMousePoint = NULL;
          if (m_bRoutePoinDragging && !m_pRoutePointEditTarget->m_bIsActive) {
            double nearby_radius_meters =
                g_Platform->GetSelectRadiusPix() / m_true_scale_ppm;
            RoutePoint *pNearbyPoint = pWayPointMan->GetOtherNearbyWaypoint(
                m_pRoutePointEditTarget->m_lat, m_pRoutePointEditTarget->m_lon,
                nearby_radius_meters, m_pRoutePointEditTarget->m_GUID);
            if (pNearbyPoint && !pNearbyPoint->m_bIsInLayer &&
                pWayPointMan->IsReallyVisible(pNearbyPoint)) {
              bool duplicate = false;  // don't create duplicate point in routes
              if (m_pEditRouteArray && !pNearbyPoint->m_bIsolatedMark) {
                for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount();
                     ir++) {
                  Route *pr = (Route *)m_pEditRouteArray->Item(ir);
                  if (pr && pr->pRoutePointList) {
                    auto *list = pr->pRoutePointList;
                    auto pos =
                        std::find(list->begin(), list->end(), pNearbyPoint);
                    if (pos != list->end()) {
                      duplicate = true;
                      break;
                    }
                  }
                }
              }
 
              // Special case:
              // Allow "re-use" of a route's waypoints iff it is a simple
              // isolated route. This allows, for instance, creation of a closed
              // polygon route
              if (m_pEditRouteArray->GetCount() == 1) duplicate = false;
 
              if (!duplicate) {
                int dlg_return;
                dlg_return =
                    OCPNMessageBox(this,
                                   _("Replace this RoutePoint by the nearby "
                                     "Waypoint?"),
                                   _("OpenCPN RoutePoint change"),
                                   (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                if (dlg_return == wxID_YES) {
                  /*double confirmation if the dragged point has been manually
                   * created which can be important and could be deleted
                   * unintentionally*/
                  tail = g_pRouteMan->FindVisibleRouteContainingWaypoint(
                      pNearbyPoint);
                  current =
                      FindRouteContainingWaypoint(m_pRoutePointEditTarget);
 
                  if (tail && current && (tail != current)) {
                    int dlg_return1;
                    connect = tail->GetIndexOf(pNearbyPoint);
                    int index_current_route =
                        current->GetIndexOf(m_pRoutePointEditTarget);
                    index_last = current->GetIndexOf(current->GetLastPoint());
                    dlg_return1 = wxID_NO;
                    if (index_last ==
                        index_current_route) {  // we are dragging the last
                                                // point of the route
                      if (connect != tail->GetnPoints()) {  // anything to do?
 
                        wxString dmsg(
                            _("Last part of route to be appended to dragged "
                              "route?"));
                        if (connect == 1)
                          dmsg =
                              _("Full route to be appended to dragged route?");
 
                        dlg_return1 = OCPNMessageBox(
                            this, dmsg, _("OpenCPN Route Create"),
                            (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                        if (dlg_return1 == wxID_YES) {
                          appending = true;
                        }
                      }
                    } else if (index_current_route ==
                               1) {  // dragging the first point of the route
                      if (connect != 1) {  // anything to do?
 
                        wxString dmsg(
                            _("First part of route to be inserted into dragged "
                              "route?"));
                        if (connect == tail->GetnPoints())
                          dmsg = _(
                              "Full route to be inserted into dragged route?");
 
                        dlg_return1 = OCPNMessageBox(
                            this, dmsg, _("OpenCPN Route Create"),
                            (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                        if (dlg_return1 == wxID_YES) {
                          inserting = true;
                        }
                      }
                    }
                  }
 
                  if (m_pRoutePointEditTarget->IsShared()) {
                    dlg_return = wxID_NO;
                    dlg_return = OCPNMessageBox(
                        this,
                        _("Do you really want to delete and replace this "
                          "WayPoint") +
                            "\n" + _("which has been created manually?"),
                        ("OpenCPN RoutePoint warning"),
                        (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
                  }
                }
                if (dlg_return == wxID_YES) {
                  pMousePoint = pNearbyPoint;
                  if (pMousePoint->m_bIsolatedMark) {
                    pMousePoint->SetShared(true);
                  }
                  pMousePoint->m_bIsolatedMark =
                      false;  // definitely no longer isolated
                  pMousePoint->m_bIsInRoute = true;
                }
              }
            }
          }
          if (!pMousePoint)
            pSelect->UpdateSelectableRouteSegments(m_pRoutePointEditTarget);
 
          if (m_pEditRouteArray) {
            for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount();
                 ir++) {
              Route *pr = (Route *)m_pEditRouteArray->Item(ir);
              if (g_pRouteMan->IsRouteValid(pr)) {
                if (pMousePoint) {  // replace dragged point by nearby one
                  auto *list = pr->pRoutePointList;
                  auto pos = std::find(list->begin(), list->end(),
                                       m_pRoutePointEditTarget);
 
                  pSelect->DeleteAllSelectableRoutePoints(pr);
                  pSelect->DeleteAllSelectableRouteSegments(pr);
 
                  pr->pRoutePointList->insert(pos, pMousePoint);
                  pos = std::find(list->begin(), list->end(),
                                  m_pRoutePointEditTarget);
                  if (pos != list->end()) list->erase(pos);
                  // pr->pRoutePointList->erase(pos + 1);
 
                  pSelect->AddAllSelectableRouteSegments(pr);
                  pSelect->AddAllSelectableRoutePoints(pr);
                }
                pr->FinalizeForRendering();
                pr->UpdateSegmentDistances();
                pr->m_bIsBeingEdited = false;
 
                if (m_bRoutePoinDragging) {
                  // Special case optimization.
                  // Dragging a single point of a route
                  // without any point additions or re-ordering
                  if (!pMousePoint)
                    NavObj_dB::GetInstance().UpdateRoutePoint(
                        m_pRoutePointEditTarget);
                  else
                    NavObj_dB::GetInstance().UpdateRoute(pr);
                }
                pr->SetHiLite(0);
              }
            }
            Refresh(false);
          }
 
          if (appending) {
            // copy tail from connect until length to end of current after
            // dragging
 
            int length = tail->GetnPoints();
            for (int i = connect + 1; i <= length; i++) {
              current->AddPointAndSegment(tail->GetPoint(i), false);
              if (current)
                current->m_lastMousePointIndex = current->GetnPoints();
              m_routeState++;
              gFrame->RefreshAllCanvas();
              ret = true;
            }
            current->FinalizeForRendering();
            current->m_bIsBeingEdited = false;
            FinishRoute();
            g_pRouteMan->DeleteRoute(tail);
          }
          if (inserting) {
            pSelect->DeleteAllSelectableRoutePoints(current);
            pSelect->DeleteAllSelectableRouteSegments(current);
            for (int i = 1; i < connect; i++) {  // numbering in the tail route
              current->InsertPointAndSegment(tail->GetPoint(i), i - 1, false);
            }
            pSelect->AddAllSelectableRouteSegments(current);
            pSelect->AddAllSelectableRoutePoints(current);
            current->FinalizeForRendering();
            current->m_bIsBeingEdited = false;
            g_pRouteMan->DeleteRoute(tail);
          }
 
          //    Update the RouteProperties Dialog, if currently shown
          if (pRoutePropDialog && pRoutePropDialog->IsShown()) {
            if (m_pEditRouteArray) {
              for (unsigned int ir = 0; ir < m_pEditRouteArray->GetCount();
                   ir++) {
                Route *pr = (Route *)m_pEditRouteArray->Item(ir);
                if (g_pRouteMan->IsRouteValid(pr)) {
                  if (pRoutePropDialog->GetRoute() == pr) {
                    pRoutePropDialog->SetRouteAndUpdate(pr, true);
                  }
                }
              }
            }
          }
 
          if (pMousePoint) {
            // pConfig->DeleteWayPoint(m_pRoutePointEditTarget);
            NavObj_dB::GetInstance().DeleteRoutePoint(m_pRoutePointEditTarget);
            pWayPointMan->RemoveRoutePoint(m_pRoutePointEditTarget);
            // Hide mark properties dialog if open on the replaced point
            if ((NULL != g_pMarkInfoDialog) && (g_pMarkInfoDialog->IsShown()))
              if (m_pRoutePointEditTarget == g_pMarkInfoDialog->GetRoutePoint())
                g_pMarkInfoDialog->Hide();
 
            delete m_pRoutePointEditTarget;
            m_lastRoutePointEditTarget = NULL;
            undo->AfterUndoableAction(pMousePoint);
            undo->InvalidateUndo();
          } else {
            m_pRoutePointEditTarget->m_bPtIsSelected = false;
            m_pRoutePointEditTarget->m_bRPIsBeingEdited = false;
 
            undo->AfterUndoableAction(m_pRoutePointEditTarget);
          }
 
          delete m_pEditRouteArray;
          m_pEditRouteArray = NULL;
        }
 
        InvalidateGL();
        m_bRouteEditing = false;
        m_pRoutePointEditTarget = NULL;
 
        // if (m_toolBar && !m_toolBar->IsToolbarShown()) SurfaceToolbar();
        ret = true;
      }
 
      else if (m_bMarkEditing) {  // end of Waypoint drag
        if (m_pRoutePointEditTarget) {
          if (m_bRoutePoinDragging) {
            // pConfig->UpdateWayPoint(m_pRoutePointEditTarget);
            NavObj_dB::GetInstance().UpdateRoutePoint(m_pRoutePointEditTarget);
          }
          undo->AfterUndoableAction(m_pRoutePointEditTarget);
          m_pRoutePointEditTarget->m_bRPIsBeingEdited = false;
          if (!g_bopengl) {
            wxRect wp_rect;
            RoutePointGui(*m_pRoutePointEditTarget)
                .CalculateDCRect(m_dc_route, this, &wp_rect);
            m_pRoutePointEditTarget->m_bPtIsSelected = false;
            RefreshRect(wp_rect, true);
          }
        }
        m_pRoutePointEditTarget = NULL;
        m_bMarkEditing = false;
        // if (m_toolBar && !m_toolBar->IsToolbarShown()) SurfaceToolbar();
        ret = true;
      }
 
      else if (leftIsDown) {  // left click for chart center
        leftIsDown = false;
        ret = false;
 
        if (!g_btouch) {
          if (!m_bChartDragging && !m_bMeasure_Active) {
          } else {
            m_bChartDragging = false;
          }
        }
      }
      m_bRoutePoinDragging = false;
    }  // !btouch
 
    if (ret) return true;
  }  // left up
 
  if (event.RightDown()) {
    SetFocus();  //  This is to let a plugin know which canvas is right-clicked
    last_drag.x = mx;
    last_drag.y = my;
 
    if (g_btouch) {
      //            if( m_pRoutePointEditTarget )
      //                return false;
    }
 
    ret = true;
    m_FinishRouteOnKillFocus = false;
    CallPopupMenu(mx, my);
    m_FinishRouteOnKillFocus = true;
  }  // Right down
 
  return ret;
}
 
bool panleftIsDown;
bool ChartCanvas::MouseEventProcessCanvas(wxMouseEvent &event) {
  // Skip all mouse processing if shift is held.
  // This allows plugins to implement shift+drag behaviors.
  if (event.ShiftDown()) {
    return false;
  }
  int x, y;
  event.GetPosition(&x, &y);
 
  x *= m_displayScale;
  y *= m_displayScale;
 
  //        Check for wheel rotation
  // ideally, should be just longer than the time between
  // processing accumulated mouse events from the event queue
  // as would happen during screen redraws.
  int wheel_dir = event.GetWheelRotation();
 
  if (wheel_dir) {
    int mouse_wheel_oneshot = abs(wheel_dir) * 4;  // msec
    wheel_dir = wheel_dir > 0 ? 1 : -1;            // normalize
 
    double factor = g_mouse_zoom_sensitivity;
    if (wheel_dir < 0) factor = 1 / factor;
 
    if (g_bsmoothpanzoom) {
      if ((m_wheelstopwatch.Time() < m_wheelzoom_stop_oneshot)) {
        if (wheel_dir == m_last_wheel_dir) {
          m_wheelzoom_stop_oneshot += mouse_wheel_oneshot;
          //                    m_zoom_target /= factor;
        } else
          StopMovement();
      } else {
        m_wheelzoom_stop_oneshot = mouse_wheel_oneshot;
        m_wheelstopwatch.Start(0);
        //                m_zoom_target =  VPoint.chart_scale / factor;
      }
    }
 
    m_last_wheel_dir = wheel_dir;
 
    ZoomCanvas(factor, true, false);
  }
 
  if (event.LeftDown()) {
    // Skip the first left click if it will cause a canvas focus shift
    if ((GetCanvasCount() > 1) && (this != g_focusCanvas)) {
      return false;
    }
 
    last_drag.x = x, last_drag.y = y;
    panleftIsDown = true;
  }
 
  if (event.LeftUp()) {
    if (panleftIsDown) {  // leftUp for chart center, but only after a leftDown
                          // seen here.
      panleftIsDown = false;
 
      if (!g_btouch) {
        if (!m_bChartDragging && !m_bMeasure_Active) {
          switch (cursor_region) {
            case MID_RIGHT: {
              PanCanvas(100, 0);
              break;
            }
 
            case MID_LEFT: {
              PanCanvas(-100, 0);
              break;
            }
 
            case MID_TOP: {
              PanCanvas(0, 100);
              break;
            }
 
            case MID_BOT: {
              PanCanvas(0, -100);
              break;
            }
 
            case CENTER: {
              PanCanvas(x - GetVP().pix_width / 2, y - GetVP().pix_height / 2);
              break;
            }
          }
        } else {
          m_bChartDragging = false;
        }
      }
    }
  }
 
  if (event.Dragging() && event.LeftIsDown()) {
    /*
     * fixed dragging.
     * On my Surface Pro 3 running Arch Linux there is no mouse down event
     * before the drag event. Hence, as there is no mouse down event, last_drag
     * is not reset before the drag. And that results in one single drag
     * session, meaning you cannot drag the map a few miles north, lift your
     * finger, and the go even further north. Instead, the map resets itself
     * always to the very first drag start (since there is not reset of
     * last_drag).
     *
     * Besides, should not left down and dragging be enough of a situation to
     * start a drag procedure?
     *
     * Anyways, guarded it to be active in touch situations only.
     */
    if (g_btouch && !m_inPinch) {
      struct timespec now;
      clock_gettime(CLOCK_MONOTONIC, &now);
      uint64_t tnow = (1e9 * now.tv_sec) + now.tv_nsec;
 
      bool trigger_hold = false;
      if (false == m_bChartDragging) {
        if (m_DragTrigger < 0) {
          // printf("\ntrigger1\n");
          m_DragTrigger = 0;
          m_DragTriggerStartTime = tnow;
          trigger_hold = true;
        } else {
          if (((tnow - m_DragTriggerStartTime) / 1e6) > 20) {  // m sec
            m_DragTrigger = -1;                                // Reset trigger
            // printf("trigger fired\n");
          }
        }
      }
      if (trigger_hold) return true;
 
      if (false == m_bChartDragging) {
        // printf("starting drag\n");
        //  Reset drag calculation members
        last_drag.x = x - 1, last_drag.y = y - 1;
        m_bChartDragging = true;
        m_chart_drag_total_time = 0;
        m_chart_drag_total_x = 0;
        m_chart_drag_total_y = 0;
        m_inertia_last_drag_x = x;
        m_inertia_last_drag_y = y;
        m_drag_vec_x.clear();
        m_drag_vec_y.clear();
        m_drag_vec_t.clear();
        m_last_drag_time = tnow;
      }
 
      // Calculate and store drag dynamics.
      uint64_t delta_t = tnow - m_last_drag_time;
      double delta_tf = delta_t / 1e9;
 
      m_chart_drag_total_time += delta_tf;
      m_chart_drag_total_x += m_inertia_last_drag_x - x;
      m_chart_drag_total_y += m_inertia_last_drag_y - y;
 
      m_drag_vec_x.push_back(m_inertia_last_drag_x - x);
      m_drag_vec_y.push_back(m_inertia_last_drag_y - y);
      m_drag_vec_t.push_back(delta_tf);
 
      m_inertia_last_drag_x = x;
      m_inertia_last_drag_y = y;
      m_last_drag_time = tnow;
 
      if ((abs(last_drag.x - x) > 2) || (abs(last_drag.y - y) > 2)) {
        m_bChartDragging = true;
        StartTimedMovement();
        m_pan_drag.x += last_drag.x - x;
        m_pan_drag.y += last_drag.y - y;
        last_drag.x = x, last_drag.y = y;
      }
    } else if (!g_btouch) {
      if ((last_drag.x != x) || (last_drag.y != y)) {
        if (!m_routeState) {  // Correct fault on wx32/gtk3, uncommanded
                              // dragging on route create.
                              //   github #2994
          m_bChartDragging = true;
          StartTimedMovement();
          m_pan_drag.x += last_drag.x - x;
          m_pan_drag.y += last_drag.y - y;
          last_drag.x = x, last_drag.y = y;
        }
      }
    }
 
    // Handle some special cases
    if (g_btouch) {
      if ((m_bMeasure_Active && m_nMeasureState) || (m_routeState)) {
        // deactivate next LeftUp to ovoid creating an unexpected point
        m_ignore_next_leftup = true;
        m_DoubleClickTimer->Start();
        singleClickEventIsValid = false;
      }
    }
  }
 
  return true;
}
 
void ChartCanvas::MouseEvent(wxMouseEvent &event) {
  if (MouseEventOverlayWindows(event)) return;
 
  if (MouseEventSetup(event)) return;  // handled, no further action required
 
  bool nm = MouseEventProcessObjects(event);
  if (!nm) MouseEventProcessCanvas(event);
}
 
void ChartCanvas::SetCanvasCursor(wxMouseEvent &event) {
  //    Switch to the appropriate cursor on mouse movement
 
  wxCursor *ptarget_cursor = pCursorArrow;
  if (!pPlugIn_Cursor) {
    ptarget_cursor = pCursorArrow;
    if ((!m_routeState) &&
        (!m_bMeasure_Active) /*&& ( !m_bCM93MeasureOffset_Active )*/) {
      if (cursor_region == MID_RIGHT) {
        ptarget_cursor = pCursorRight;
      } else if (cursor_region == MID_LEFT) {
        ptarget_cursor = pCursorLeft;
      } else if (cursor_region == MID_TOP) {
        ptarget_cursor = pCursorDown;
      } else if (cursor_region == MID_BOT) {
        ptarget_cursor = pCursorUp;
      } else {
        ptarget_cursor = pCursorArrow;
      }
    } else if (m_bMeasure_Active ||
               m_routeState)  // If Measure tool use Pencil Cursor
      ptarget_cursor = pCursorPencil;
  } else {
    ptarget_cursor = pPlugIn_Cursor;
  }
 
  SetCursor(*ptarget_cursor);
}
 
void ChartCanvas::LostMouseCapture(wxMouseCaptureLostEvent &event) {
  SetCursor(*pCursorArrow);
}
 
void ChartCanvas::ShowObjectQueryWindow(int x, int y, float zlat, float zlon) {
  ChartPlugInWrapper *target_plugin_chart = NULL;
  s57chart *Chs57 = NULL;
  wxFileName file;
  wxArrayString files;
 
  ChartBase *target_chart = GetChartAtCursor();
  if (target_chart) {
    file.Assign(target_chart->GetFullPath());
    if ((target_chart->GetChartType() == CHART_TYPE_PLUGIN) &&
        (target_chart->GetChartFamily() == CHART_FAMILY_VECTOR))
      target_plugin_chart = dynamic_cast<ChartPlugInWrapper *>(target_chart);
    else
      Chs57 = dynamic_cast<s57chart *>(target_chart);
  } else {  // target_chart = null, might be  mbtiles
    std::vector<int> stackIndexArray = m_pQuilt->GetExtendedStackIndexArray();
    unsigned int im = stackIndexArray.size();
    int scale = 2147483647;  // max 32b integer
    if (VPoint.b_quilt && im > 0) {
      for (unsigned int is = 0; is < im; is++) {
        if (ChartData->GetDBChartType(stackIndexArray[is]) ==
            CHART_TYPE_MBTILES) {
          if (IsTileOverlayIndexInNoShow(stackIndexArray[is])) continue;
          double lat, lon;
          VPoint.GetLLFromPix(wxPoint(mouse_x, mouse_y), &lat, &lon);
          if (ChartData->GetChartTableEntry(stackIndexArray[is])
                  .GetBBox()
                  .Contains(lat, lon)) {
            if (ChartData->GetChartTableEntry(stackIndexArray[is]).GetScale() <
                scale) {
              scale =
                  ChartData->GetChartTableEntry(stackIndexArray[is]).GetScale();
              file.Assign(ChartData->GetDBChartFileName(stackIndexArray[is]));
            }
          }
        }
      }
    }
  }
 
  std::vector<Ais8_001_22 *> area_notices;
 
  if (g_pAIS && m_bShowAIS && g_bShowAreaNotices) {
    float vp_scale = GetVPScale();
 
    for (const auto &target : g_pAIS->GetAreaNoticeSourcesList()) {
      auto target_data = target.second;
      if (!target_data->area_notices.empty()) {
        for (auto &ani : target_data->area_notices) {
          Ais8_001_22 &area_notice = ani.second;
 
          BoundingBox bbox;
 
          for (Ais8_001_22_SubAreaList::iterator sa =
                   area_notice.sub_areas.begin();
               sa != area_notice.sub_areas.end(); ++sa) {
            switch (sa->shape) {
              case AIS8_001_22_SHAPE_CIRCLE: {
                wxPoint target_point;
                GetCanvasPointPix(sa->latitude, sa->longitude, &target_point);
                bbox.Expand(target_point);
                if (sa->radius_m > 0.0) bbox.EnLarge(sa->radius_m * vp_scale);
                break;
              }
              case AIS8_001_22_SHAPE_RECT: {
                wxPoint target_point;
                GetCanvasPointPix(sa->latitude, sa->longitude, &target_point);
                bbox.Expand(target_point);
                if (sa->e_dim_m > sa->n_dim_m)
                  bbox.EnLarge(sa->e_dim_m * vp_scale);
                else
                  bbox.EnLarge(sa->n_dim_m * vp_scale);
                break;
              }
              case AIS8_001_22_SHAPE_POLYGON:
              case AIS8_001_22_SHAPE_POLYLINE: {
                for (int i = 0; i < 4; ++i) {
                  double lat = sa->latitude;
                  double lon = sa->longitude;
                  ll_gc_ll(lat, lon, sa->angles[i], sa->dists_m[i] / 1852.0,
                           &lat, &lon);
                  wxPoint target_point;
                  GetCanvasPointPix(lat, lon, &target_point);
                  bbox.Expand(target_point);
                }
                break;
              }
              case AIS8_001_22_SHAPE_SECTOR: {
                double lat1 = sa->latitude;
                double lon1 = sa->longitude;
                double lat, lon;
                wxPoint target_point;
                GetCanvasPointPix(lat1, lon1, &target_point);
                bbox.Expand(target_point);
                for (int i = 0; i < 18; ++i) {
                  ll_gc_ll(
                      lat1, lon1,
                      sa->left_bound_deg +
                          i * (sa->right_bound_deg - sa->left_bound_deg) / 18,
                      sa->radius_m / 1852.0, &lat, &lon);
                  GetCanvasPointPix(lat, lon, &target_point);
                  bbox.Expand(target_point);
                }
                ll_gc_ll(lat1, lon1, sa->right_bound_deg, sa->radius_m / 1852.0,
                         &lat, &lon);
                GetCanvasPointPix(lat, lon, &target_point);
                bbox.Expand(target_point);
                break;
              }
            }
          }
 
          if (bbox.GetValid() && bbox.PointInBox(x, y)) {
            area_notices.push_back(&area_notice);
          }
        }
      }
    }
  }
 
  if (target_chart || !area_notices.empty() || file.HasName()) {
    // Go get the array of all objects at the cursor lat/lon
    int sel_rad_pix = 5;
    float SelectRadius = sel_rad_pix / (GetVP().view_scale_ppm * 1852 * 60);
 
    // Make sure we always get the lights from an object, even if we are
    // currently not displaying lights on the chart.
 
    SetCursor(wxCURSOR_WAIT);
    bool lightsVis = m_encShowLights;  // gFrame->ToggleLights( false );
    if (!lightsVis) SetShowENCLights(true);
    ;
 
    ListOfObjRazRules *rule_list = NULL;
    ListOfPI_S57Obj *pi_rule_list = NULL;
    if (Chs57)
      rule_list =
          Chs57->GetObjRuleListAtLatLon(zlat, zlon, SelectRadius, &GetVP());
    else if (target_plugin_chart)
      pi_rule_list = g_pi_manager->GetPlugInObjRuleListAtLatLon(
          target_plugin_chart, zlat, zlon, SelectRadius, GetVP());
 
    ListOfObjRazRules *overlay_rule_list = NULL;
    ChartBase *overlay_chart = GetOverlayChartAtCursor();
    s57chart *CHs57_Overlay = dynamic_cast<s57chart *>(overlay_chart);
 
    if (CHs57_Overlay) {
      overlay_rule_list = CHs57_Overlay->GetObjRuleListAtLatLon(
          zlat, zlon, SelectRadius, &GetVP());
    }
 
    if (!lightsVis) SetShowENCLights(false);
 
    wxString objText;
    wxFont *dFont = FontMgr::Get().GetFont(_("ObjectQuery"));
    wxString face = dFont->GetFaceName();
 
    if (NULL == g_pObjectQueryDialog) {
      g_pObjectQueryDialog =
          new S57QueryDialog(this, -1, _("Object Query"), wxDefaultPosition,
                             wxSize(g_S57_dialog_sx, g_S57_dialog_sy));
    }
 
    wxColor bg = g_pObjectQueryDialog->GetBackgroundColour();
    wxColor fg = FontMgr::Get().GetFontColor(_("ObjectQuery"));
 
#ifdef __WXOSX__
    // Auto Adjustment for dark mode
    fg = g_pObjectQueryDialog->GetForegroundColour();
#endif
 
    objText.Printf(
        "<html><body bgcolor=#%02x%02x%02x><font color=#%02x%02x%02x>",
        bg.Red(), bg.Green(), bg.Blue(), fg.Red(), fg.Green(), fg.Blue());
 
#ifdef __WXOSX__
    int points = dFont->GetPointSize();
#else
    int points = dFont->GetPointSize() + 1;
#endif
 
    int sizes[7];
    for (int i = -2; i < 5; i++) {
      sizes[i + 2] = points + i + (i > 0 ? i : 0);
    }
    g_pObjectQueryDialog->m_phtml->SetFonts(face, face, sizes);
 
    if (wxFONTSTYLE_ITALIC == dFont->GetStyle()) objText += "<i>";
 
    if (overlay_rule_list && CHs57_Overlay) {
      objText << CHs57_Overlay->CreateObjDescriptions(overlay_rule_list);
      objText << "<hr noshade>";
    }
 
    for (std::vector<Ais8_001_22 *>::iterator an = area_notices.begin();
         an != area_notices.end(); ++an) {
      objText << "<b>AIS Area Notice:</b> ";
      objText << ais8_001_22_notice_names[(*an)->notice_type];
      for (std::vector<Ais8_001_22_SubArea>::iterator sa =
               (*an)->sub_areas.begin();
           sa != (*an)->sub_areas.end(); ++sa)
        if (!sa->text.empty()) objText << sa->text;
      objText << "<br>expires: " << (*an)->expiry_time.Format();
      objText << "<hr noshade>";
    }
 
    if (Chs57)
      objText << Chs57->CreateObjDescriptions(rule_list);
    else if (target_plugin_chart)
      objText << g_pi_manager->CreateObjDescriptions(target_plugin_chart,
                                                     pi_rule_list);
 
    if (wxFONTSTYLE_ITALIC == dFont->GetStyle()) objText << "</i>";
 
    // Add the additional info files
    wxString AddFiles, filenameOK;
    int filecount = 0;
    if (!target_plugin_chart) {  // plugincharts shoud take care of this in the
                                 // plugin
 
      AddFiles = wxString::Format(
          "<hr noshade><br><b>Additional info files attached to: </b> "
          "<font "
          "size=-2>%s</font><br><table border=0 cellspacing=0 "
          "cellpadding=3>",
          file.GetFullName());
      file.Normalize();
      file.Assign(file.GetPath(), "");
      wxDir dir(file.GetFullPath());
      wxString filename;
      bool cont = dir.GetFirst(&filename, "", wxDIR_FILES);
      while (cont) {
        file.Assign(dir.GetNameWithSep().append(filename));
        wxString FormatString =
            "<td valign=top><font size=-2><a "
            "href=\"%s\">%s</a></font></td>";
        if (g_ObjQFileExt.Find(file.GetExt().Lower()) != wxNOT_FOUND) {
          filenameOK = file.GetFullPath();  // remember last valid name
          // we are making a 3 columns table. New row only every third file
          if (3 * ((int)filecount / 3) == filecount)
            FormatString.Prepend("<tr>");  // new row
          else
            FormatString.Prepend(
                "<td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp</td>");  // an empty
                                                            // spacer column
 
          AddFiles << wxString::Format(FormatString, file.GetFullPath(),
                                       file.GetFullName());
          filecount++;
        }
        cont = dir.GetNext(&filename);
      }
      objText << AddFiles << "</table>";
    }
    objText << "</font>";
    objText << "</body></html>";
 
    if (Chs57 || target_plugin_chart || (filecount > 1)) {
      g_pObjectQueryDialog->SetHTMLPage(objText);
      g_pObjectQueryDialog->Show();
    }
    if ((!Chs57 && filecount == 1)) {  // only one file?, show direktly
      // generate an event to avoid double code
      wxHtmlLinkInfo hli(filenameOK);
      wxHtmlLinkEvent hle(1, hli);
      g_pObjectQueryDialog->OnHtmlLinkClicked(hle);
    }
 
    if (rule_list) rule_list->Clear();
    delete rule_list;
 
    if (overlay_rule_list) overlay_rule_list->Clear();
    delete overlay_rule_list;
 
    if (pi_rule_list) pi_rule_list->Clear();
    delete pi_rule_list;
 
    SetCursor(wxCURSOR_ARROW);
  }
}
 
void ChartCanvas::ShowMarkPropertiesDialog(RoutePoint *markPoint) {
  bool bNew = false;
  if (!g_pMarkInfoDialog) {  // There is one global instance of the MarkProp
                             // Dialog
    g_pMarkInfoDialog = new MarkInfoDlg(this);
    bNew = true;
  }
 
  if (1 /*g_bresponsive*/) {
    wxSize canvas_size = GetSize();
 
    int best_size_y = wxMin(400 / OCPN_GetWinDIPScaleFactor(), canvas_size.y);
    g_pMarkInfoDialog->SetMinSize(wxSize(-1, best_size_y));
 
    g_pMarkInfoDialog->Layout();
 
    wxPoint canvas_pos = GetPosition();
    wxSize fitted_size = g_pMarkInfoDialog->GetSize();
 
    bool newFit = false;
    if (canvas_size.x < fitted_size.x) {
      fitted_size.x = canvas_size.x - 40;
      if (canvas_size.y < fitted_size.y)
        fitted_size.y -= 40;  // scrollbar added
    }
    if (canvas_size.y < fitted_size.y) {
      fitted_size.y = canvas_size.y - 40;
      if (canvas_size.x < fitted_size.x)
        fitted_size.x -= 40;  // scrollbar added
    }
 
    if (newFit) {
      g_pMarkInfoDialog->SetSize(fitted_size);
      g_pMarkInfoDialog->Centre();
    }
  }
 
  markPoint->m_bRPIsBeingEdited = false;
 
  wxString title_base = _("Mark Properties");
  if (markPoint->m_bIsInRoute) {
    title_base = _("Waypoint Properties");
  }
  g_pMarkInfoDialog->SetRoutePoint(markPoint);
  g_pMarkInfoDialog->UpdateProperties();
  if (markPoint->m_bIsInLayer) {
    wxString caption(wxString::Format("%s, %s: %s", title_base, _("Layer"),
                                      GetLayerName(markPoint->m_LayerID)));
    g_pMarkInfoDialog->SetDialogTitle(caption);
  } else
    g_pMarkInfoDialog->SetDialogTitle(title_base);
 
  g_pMarkInfoDialog->Show();
  g_pMarkInfoDialog->Raise();
  g_pMarkInfoDialog->InitialFocus();
  if (bNew) g_pMarkInfoDialog->CenterOnScreen();
}
 
void ChartCanvas::ShowRoutePropertiesDialog(wxString title, Route *selected) {
  pRoutePropDialog = RoutePropDlgImpl::getInstance(this);
  pRoutePropDialog->SetRouteAndUpdate(selected);
  // pNew->UpdateProperties();
  pRoutePropDialog->Show();
  pRoutePropDialog->Raise();
  return;
  pRoutePropDialog = RoutePropDlgImpl::getInstance(
      this);  // There is one global instance of the RouteProp Dialog
 
  if (g_bresponsive) {
    wxSize canvas_size = GetSize();
    wxPoint canvas_pos = GetPosition();
    wxSize fitted_size = pRoutePropDialog->GetSize();
    ;
 
    if (canvas_size.x < fitted_size.x) {
      fitted_size.x = canvas_size.x;
      if (canvas_size.y < fitted_size.y)
        fitted_size.y -= 20;  // scrollbar added
    }
    if (canvas_size.y < fitted_size.y) {
      fitted_size.y = canvas_size.y;
      if (canvas_size.x < fitted_size.x)
        fitted_size.x -= 20;  // scrollbar added
    }
 
    pRoutePropDialog->SetSize(fitted_size);
    pRoutePropDialog->Centre();
 
    //        int xp = (canvas_size.x - fitted_size.x)/2;
    //        int yp = (canvas_size.y - fitted_size.y)/2;
 
    wxPoint xxp = ClientToScreen(canvas_pos);
    //        pRoutePropDialog->Move(xxp.x + xp, xxp.y + yp);
  }
 
  pRoutePropDialog->SetRouteAndUpdate(selected);
 
  pRoutePropDialog->Show();
 
  Refresh(false);
}
 
void ChartCanvas::ShowTrackPropertiesDialog(Track *selected) {
  pTrackPropDialog = TrackPropDlg::getInstance(
      this);  // There is one global instance of the RouteProp Dialog
 
  pTrackPropDialog->SetTrackAndUpdate(selected);
  pTrackPropDialog->UpdateProperties();
 
  pTrackPropDialog->Show();
 
  Refresh(false);
}
 
void pupHandler_PasteWaypoint() {
  Kml kml;
 
  int pasteBuffer = kml.ParsePasteBuffer();
  RoutePoint *pasted = kml.GetParsedRoutePoint();
  if (!pasted) return;
 
  double nearby_radius_meters =
      g_Platform->GetSelectRadiusPix() /
      gFrame->GetPrimaryCanvas()->GetCanvasTrueScale();
 
  RoutePoint *nearPoint = pWayPointMan->GetNearbyWaypoint(
      pasted->m_lat, pasted->m_lon, nearby_radius_meters);
 
  int answer = wxID_NO;
  if (nearPoint && !nearPoint->m_bIsInLayer) {
    wxString msg;
    msg << _(
        "There is an existing waypoint at the same location as the one you are "
        "pasting. Would you like to merge the pasted data with it?\n\n");
    msg << _("Answering 'No' will create a new waypoint at the same location.");
    answer = OCPNMessageBox(NULL, msg, _("Merge waypoint?"),
                            (long)wxYES_NO | wxCANCEL | wxNO_DEFAULT);
  }
 
  if (answer == wxID_YES) {
    nearPoint->SetName(pasted->GetName());
    nearPoint->m_MarkDescription = pasted->m_MarkDescription;
    if (pRouteManagerDialog && pRouteManagerDialog->IsShown())
      pRouteManagerDialog->UpdateWptListCtrl();
  }
 
  if (answer == wxID_NO) {
    RoutePoint *newPoint = new RoutePoint(pasted);
    newPoint->m_bIsolatedMark = true;
    pSelect->AddSelectableRoutePoint(newPoint->m_lat, newPoint->m_lon,
                                     newPoint);
    // pConfig->AddNewWayPoint(newPoint, -1);
    NavObj_dB::GetInstance().InsertRoutePoint(newPoint);
 
    pWayPointMan->AddRoutePoint(newPoint);
    if (pRouteManagerDialog && pRouteManagerDialog->IsShown())
      pRouteManagerDialog->UpdateWptListCtrl();
    if (RoutePointGui(*newPoint).IsVisibleSelectable(g_focusCanvas))
      RoutePointGui(*newPoint).ShowScaleWarningMessage(g_focusCanvas);
  }
 
  gFrame->InvalidateAllGL();
  gFrame->RefreshAllCanvas(false);
}
 
void pupHandler_PasteRoute() {
  Kml kml;
 
  int pasteBuffer = kml.ParsePasteBuffer();
  Route *pasted = kml.GetParsedRoute();
  if (!pasted) return;
 
  double nearby_radius_meters =
      g_Platform->GetSelectRadiusPix() /
      gFrame->GetPrimaryCanvas()->GetCanvasTrueScale();
 
  RoutePoint *curPoint;
  RoutePoint *nearPoint;
  RoutePoint *prevPoint = NULL;
 
  bool mergepoints = false;
  bool createNewRoute = true;
  int existingWaypointCounter = 0;
 
  for (int i = 1; i <= pasted->GetnPoints(); i++) {
    curPoint = pasted->GetPoint(i);  // NB! n starts at 1 !
    nearPoint = pWayPointMan->GetNearbyWaypoint(
        curPoint->m_lat, curPoint->m_lon, nearby_radius_meters);
    if (nearPoint) {
      mergepoints = true;
      existingWaypointCounter++;
      // Small hack here to avoid both extending RoutePoint and repeating all
      // the GetNearbyWaypoint calculations. Use existin data field in
      // RoutePoint as temporary storage.
      curPoint->m_bPtIsSelected = true;
    }
  }
 
  int answer = wxID_NO;
  if (mergepoints) {
    wxString msg;
    msg << _(
        "There are existing waypoints at the same location as some of the ones "
        "you are pasting. Would you like to just merge the pasted data into "
        "them?\n\n");
    msg << _("Answering 'No' will create all new waypoints for this route.");
    answer = OCPNMessageBox(NULL, msg, _("Merge waypoints?"),
                            (long)wxYES_NO | wxCANCEL | wxYES_DEFAULT);
 
    if (answer == wxID_CANCEL) {
      return;
    }
  }
 
  // If all waypoints exist since before, and a route with the same name, we
  // don't create a new route.
  if (mergepoints && answer == wxID_YES &&
      existingWaypointCounter == pasted->GetnPoints()) {
    for (Route *proute : *pRouteList) {
      if (pasted->m_RouteNameString == proute->m_RouteNameString) {
        createNewRoute = false;
        break;
      }
    }
  }
 
  Route *newRoute = 0;
  RoutePoint *newPoint = 0;
 
  if (createNewRoute) {
    newRoute = new Route();
    newRoute->m_RouteNameString = pasted->m_RouteNameString;
  }
 
  for (int i = 1; i <= pasted->GetnPoints(); i++) {
    curPoint = pasted->GetPoint(i);
    if (answer == wxID_YES && curPoint->m_bPtIsSelected) {
      curPoint->m_bPtIsSelected = false;
      newPoint = pWayPointMan->GetNearbyWaypoint(
          curPoint->m_lat, curPoint->m_lon, nearby_radius_meters);
      newPoint->SetName(curPoint->GetName());
      newPoint->m_MarkDescription = curPoint->m_MarkDescription;
 
      if (createNewRoute) newRoute->AddPoint(newPoint);
    } else {
      curPoint->m_bPtIsSelected = false;
 
      newPoint = new RoutePoint(curPoint);
      newPoint->m_bIsolatedMark = false;
      newPoint->SetIconName("circle");
      newPoint->m_bIsVisible = true;
      newPoint->m_bShowName = false;
      newPoint->SetShared(false);
 
      newRoute->AddPoint(newPoint);
      pSelect->AddSelectableRoutePoint(newPoint->m_lat, newPoint->m_lon,
                                       newPoint);
      // pConfig->AddNewWayPoint(newPoint, -1);
      NavObj_dB::GetInstance().InsertRoutePoint(newPoint);
      pWayPointMan->AddRoutePoint(newPoint);
    }
    if (i > 1 && createNewRoute)
      pSelect->AddSelectableRouteSegment(prevPoint->m_lat, prevPoint->m_lon,
                                         curPoint->m_lat, curPoint->m_lon,
                                         prevPoint, newPoint, newRoute);
    prevPoint = newPoint;
  }
 
  if (createNewRoute) {
    pRouteList->push_back(newRoute);
    // pConfig->AddNewRoute(newRoute);  // use auto next num
    NavObj_dB::GetInstance().InsertRoute(newRoute);
 
    if (pRoutePropDialog && pRoutePropDialog->IsShown()) {
      pRoutePropDialog->SetRouteAndUpdate(newRoute);
    }
 
    if (pRouteManagerDialog && pRouteManagerDialog->IsShown()) {
      pRouteManagerDialog->UpdateRouteListCtrl();
      pRouteManagerDialog->UpdateWptListCtrl();
    }
    gFrame->InvalidateAllGL();
    gFrame->RefreshAllCanvas(false);
  }
  if (RoutePointGui(*newPoint).IsVisibleSelectable(g_focusCanvas))
    RoutePointGui(*newPoint).ShowScaleWarningMessage(g_focusCanvas);
}
 
void pupHandler_PasteTrack() {
  Kml kml;
 
  int pasteBuffer = kml.ParsePasteBuffer();
  Track *pasted = kml.GetParsedTrack();
  if (!pasted) return;
 
  TrackPoint *curPoint;
 
  Track *newTrack = new Track();
  TrackPoint *newPoint;
  TrackPoint *prevPoint = NULL;
 
  newTrack->SetName(pasted->GetName());
 
  for (int i = 0; i < pasted->GetnPoints(); i++) {
    curPoint = pasted->GetPoint(i);
 
    newPoint = new TrackPoint(curPoint);
 
    wxDateTime now = wxDateTime::Now();
    newPoint->SetCreateTime(curPoint->GetCreateTime());
 
    newTrack->AddPoint(newPoint);
 
    if (prevPoint)
      pSelect->AddSelectableTrackSegment(prevPoint->m_lat, prevPoint->m_lon,
                                         newPoint->m_lat, newPoint->m_lon,
                                         prevPoint, newPoint, newTrack);
 
    prevPoint = newPoint;
  }
 
  g_TrackList.push_back(newTrack);
  // pConfig->AddNewTrack(newTrack);
  NavObj_dB::GetInstance().InsertTrack(newTrack);
 
  gFrame->InvalidateAllGL();
  gFrame->RefreshAllCanvas(false);
}
 
bool ChartCanvas::InvokeCanvasMenu(int x, int y, int seltype) {
  wxJSONValue v;
  v["CanvasIndex"] = GetCanvasIndexUnderMouse();
  v["CursorPosition_x"] = x;
  v["CursorPosition_y"] = y;
  // Send a limited set of selection types depending on what is
  // found under the mouse point.
  if (seltype & SELTYPE_UNKNOWN) v["SelectionType"] = "Canvas";
  if (seltype & SELTYPE_ROUTEPOINT) v["SelectionType"] = "RoutePoint";
  if (seltype & SELTYPE_AISTARGET) v["SelectionType"] = "AISTarget";
 
  wxJSONWriter w;
  wxString out;
  w.Write(v, out);
  SendMessageToAllPlugins("OCPN_CONTEXT_CLICK", out);
 
  json_msg.Notify(std::make_shared<wxJSONValue>(v), "OCPN_CONTEXT_CLICK");
 
#if 0
#define SELTYPE_UNKNOWN 0x0001
#define SELTYPE_ROUTEPOINT 0x0002
#define SELTYPE_ROUTESEGMENT 0x0004
#define SELTYPE_TIDEPOINT 0x0008
#define SELTYPE_CURRENTPOINT 0x0010
#define SELTYPE_ROUTECREATE 0x0020
#define SELTYPE_AISTARGET 0x0040
#define SELTYPE_MARKPOINT 0x0080
#define SELTYPE_TRACKSEGMENT 0x0100
#define SELTYPE_DRAGHANDLE 0x0200
#endif
 
  if (g_bhide_context_menus) return true;
  m_canvasMenu = new CanvasMenuHandler(this, m_pSelectedRoute, m_pSelectedTrack,
                                       m_pFoundRoutePoint, m_FoundAIS_MMSI,
                                       m_pIDXCandidate, m_nmea_log);
 
  Connect(
      wxEVT_COMMAND_MENU_SELECTED,
      (wxObjectEventFunction)(wxEventFunction)&ChartCanvas::PopupMenuHandler);
 
#ifdef __WXGTK__
  // Funny requirement here for gtk, to clear the menu trigger event
  // TODO
  //  Causes a slight "flasH" of the menu,
  if (m_inLongPress) {
    m_canvasMenu->CanvasPopupMenu(x, y, seltype);
    m_inLongPress = false;
  }
#endif
 
  m_canvasMenu->CanvasPopupMenu(x, y, seltype);
 
  Disconnect(
      wxEVT_COMMAND_MENU_SELECTED,
      (wxObjectEventFunction)(wxEventFunction)&ChartCanvas::PopupMenuHandler);
 
  delete m_canvasMenu;
  m_canvasMenu = NULL;
 
#ifdef __WXQT__
  // gFrame->SurfaceToolbar();
  // g_MainToolbar->Raise();
#endif
 
  return true;
}
 
void ChartCanvas::PopupMenuHandler(wxCommandEvent &event) {
  //  Pass menu events from the canvas to the menu handler
  //  This is necessarily in ChartCanvas since that is the menu's parent.
  if (m_canvasMenu) {
    m_canvasMenu->PopupMenuHandler(event);
  }
  return;
}
 
void ChartCanvas::StartRoute() {
  // Do not allow more than one canvas to create a route at one time.
  if (g_brouteCreating) return;
 
  if (g_MainToolbar) g_MainToolbar->DisableTooltips();
 
  g_brouteCreating = true;
  m_routeState = 1;
  m_bDrawingRoute = false;
  SetCursor(*pCursorPencil);
  // SetCanvasToolbarItemState(ID_ROUTE, true);
  gFrame->SetMasterToolbarItemState(ID_MENU_ROUTE_NEW, true);
 
  HideGlobalToolbar();
 
#ifdef __ANDROID__
  androidSetRouteAnnunciator(true);
#endif
}
 
wxString ChartCanvas::FinishRoute() {
  m_routeState = 0;
  m_prev_pMousePoint = NULL;
  m_bDrawingRoute = false;
  wxString rv = "";
  if (m_pMouseRoute) rv = m_pMouseRoute->m_GUID;
 
  // SetCanvasToolbarItemState(ID_ROUTE, false);
  gFrame->SetMasterToolbarItemState(ID_MENU_ROUTE_NEW, false);
#ifdef __ANDROID__
  androidSetRouteAnnunciator(false);
#endif
 
  SetCursor(*pCursorArrow);
 
  if (m_pMouseRoute) {
    if (m_bAppendingRoute) {
      // pConfig->UpdateRoute(m_pMouseRoute);
      NavObj_dB::GetInstance().UpdateRoute(m_pMouseRoute);
    } else {
      if (m_pMouseRoute->GetnPoints() > 1) {
        // pConfig->AddNewRoute(m_pMouseRoute);
        NavObj_dB::GetInstance().UpdateRoute(m_pMouseRoute);
      } else {
        g_pRouteMan->DeleteRoute(m_pMouseRoute);
        m_pMouseRoute = NULL;
      }
    }
    if (m_pMouseRoute) m_pMouseRoute->SetHiLite(0);
 
    if (RoutePropDlgImpl::getInstanceFlag() && pRoutePropDialog &&
        (pRoutePropDialog->IsShown())) {
      pRoutePropDialog->SetRouteAndUpdate(m_pMouseRoute, true);
    }
 
    if (RouteManagerDialog::getInstanceFlag() && pRouteManagerDialog) {
      if (pRouteManagerDialog && pRouteManagerDialog->IsShown())
        pRouteManagerDialog->UpdateRouteListCtrl();
    }
  }
  m_bAppendingRoute = false;
  m_pMouseRoute = NULL;
 
  m_pSelectedRoute = NULL;
 
  undo->InvalidateUndo();
  gFrame->RefreshAllCanvas(true);
 
  if (g_MainToolbar) g_MainToolbar->EnableTooltips();
 
  ShowGlobalToolbar();
 
  g_brouteCreating = false;
 
  return rv;
}
 
void ChartCanvas::HideGlobalToolbar() {
  if (m_canvasIndex == 0) {
    m_last_TBviz = gFrame->SetGlobalToolbarViz(false);
  }
}
 
void ChartCanvas::ShowGlobalToolbar() {
  if (m_canvasIndex == 0) {
    if (m_last_TBviz) gFrame->SetGlobalToolbarViz(true);
  }
}
 
void ChartCanvas::ShowAISTargetList() {
  if (NULL == g_pAISTargetList) {  // There is one global instance of the Dialog
    g_pAISTargetList = new AISTargetListDialog(parent_frame, g_pauimgr, g_pAIS);
  }
 
  g_pAISTargetList->UpdateAISTargetList();
}
 
void ChartCanvas::RenderAllChartOutlines(ocpnDC &dc, ViewPort &vp) {
  if (!m_bShowOutlines) return;
 
  if (!ChartData) return;
 
  int nEntry = ChartData->GetChartTableEntries();
 
  for (int i = 0; i < nEntry; i++) {
    ChartTableEntry *pt = (ChartTableEntry *)&ChartData->GetChartTableEntry(i);
 
    //    Check to see if the candidate chart is in the currently active group
    bool b_group_draw = false;
    if (m_groupIndex > 0) {
      for (unsigned int ig = 0; ig < pt->GetGroupArray().size(); ig++) {
        int index = pt->GetGroupArray()[ig];
        if (m_groupIndex == index) {
          b_group_draw = true;
          break;
        }
      }
    } else
      b_group_draw = true;
 
    if (b_group_draw) RenderChartOutline(dc, i, vp);
  }
 
  //        On CM93 Composite Charts, draw the outlines of the next smaller
  //        scale cell
  cm93compchart *pcm93 = NULL;
  if (VPoint.b_quilt) {
    for (ChartBase *pch = GetFirstQuiltChart(); pch; pch = GetNextQuiltChart())
      if (pch->GetChartType() == CHART_TYPE_CM93COMP) {
        pcm93 = (cm93compchart *)pch;
        break;
      }
  } else if (m_singleChart &&
             (m_singleChart->GetChartType() == CHART_TYPE_CM93COMP))
    pcm93 = (cm93compchart *)m_singleChart;
 
  if (pcm93) {
    double chart_native_ppm = m_canvas_scale_factor / pcm93->GetNativeScale();
    double zoom_factor = GetVP().view_scale_ppm / chart_native_ppm;
 
    if (zoom_factor > 8.0) {
      wxPen mPen(GetGlobalColor("UINFM"), 2, wxPENSTYLE_SHORT_DASH);
      dc.SetPen(mPen);
    } else {
      wxPen mPen(GetGlobalColor("UINFM"), 1, wxPENSTYLE_SOLID);
      dc.SetPen(mPen);
    }
 
    pcm93->RenderNextSmallerCellOutlines(dc, vp, this);
  }
}
 
void ChartCanvas::RenderChartOutline(ocpnDC &dc, int dbIndex, ViewPort &vp) {
#ifdef ocpnUSE_GL
  if (g_bopengl && m_glcc) {
    /* opengl version specially optimized */
    m_glcc->RenderChartOutline(dc, dbIndex, vp);
    return;
  }
#endif
 
  if (ChartData->GetDBChartType(dbIndex) == CHART_TYPE_PLUGIN) {
    if (!ChartData->IsChartAvailable(dbIndex)) return;
  }
 
  float plylat, plylon;
  float plylat1, plylon1;
 
  int pixx, pixy, pixx1, pixy1;
 
  LLBBox box;
  ChartData->GetDBBoundingBox(dbIndex, box);
 
  // Don't draw an outline in the case where the chart covers the entire world
  // */
  if (box.GetLonRange() == 360) return;
 
  double lon_bias = 0;
  // chart is outside of viewport lat/lon bounding box
  if (box.IntersectOutGetBias(vp.GetBBox(), lon_bias)) return;
 
  int nPly = ChartData->GetDBPlyPoint(dbIndex, 0, &plylat, &plylon);
 
  if (ChartData->GetDBChartType(dbIndex) == CHART_TYPE_CM93)
    dc.SetPen(wxPen(GetGlobalColor("YELO1"), 1, wxPENSTYLE_SOLID));
 
  else if (ChartData->GetDBChartFamily(dbIndex) == CHART_FAMILY_VECTOR)
    dc.SetPen(wxPen(GetGlobalColor("UINFG"), 1, wxPENSTYLE_SOLID));
 
  else
    dc.SetPen(wxPen(GetGlobalColor("UINFR"), 1, wxPENSTYLE_SOLID));
 
  //        Are there any aux ply entries?
  int nAuxPlyEntries = ChartData->GetnAuxPlyEntries(dbIndex);
  if (0 == nAuxPlyEntries)  // There are no aux Ply Point entries
  {
    wxPoint r, r1;
 
    ChartData->GetDBPlyPoint(dbIndex, 0, &plylat, &plylon);
    plylon += lon_bias;
 
    GetCanvasPointPix(plylat, plylon, &r);
    pixx = r.x;
    pixy = r.y;
 
    for (int i = 0; i < nPly - 1; i++) {
      ChartData->GetDBPlyPoint(dbIndex, i + 1, &plylat1, &plylon1);
      plylon1 += lon_bias;
 
      GetCanvasPointPix(plylat1, plylon1, &r1);
      pixx1 = r1.x;
      pixy1 = r1.y;
 
      int pixxs1 = pixx1;
      int pixys1 = pixy1;
 
      bool b_skip = false;
 
      if (vp.chart_scale > 5e7) {
        //    calculate projected distance between these two points in meters
        double dist = sqrt(pow((double)(pixx1 - pixx), 2) +
                           pow((double)(pixy1 - pixy), 2)) /
                      vp.view_scale_ppm;
 
        if (dist > 0.0) {
          //    calculate GC distance between these two points in meters
          double distgc =
              DistGreatCircle(plylat, plylon, plylat1, plylon1) * 1852.;
 
          //    If the distances are nonsense, it means that the scale is very
          //    small and the segment wrapped the world So skip it....
          //    TODO improve this to draw two segments
          if (fabs(dist - distgc) > 10000. * 1852.)  // lotsa miles
            b_skip = true;
        } else
          b_skip = true;
      }
 
      ClipResult res = cohen_sutherland_line_clip_i(
          &pixx, &pixy, &pixx1, &pixy1, 0, vp.pix_width, 0, vp.pix_height);
      if (res != Invisible && !b_skip)
        dc.DrawLine(pixx, pixy, pixx1, pixy1, false);
 
      plylat = plylat1;
      plylon = plylon1;
      pixx = pixxs1;
      pixy = pixys1;
    }
 
    ChartData->GetDBPlyPoint(dbIndex, 0, &plylat1, &plylon1);
    plylon1 += lon_bias;
 
    GetCanvasPointPix(plylat1, plylon1, &r1);
    pixx1 = r1.x;
    pixy1 = r1.y;
 
    ClipResult res = cohen_sutherland_line_clip_i(
        &pixx, &pixy, &pixx1, &pixy1, 0, vp.pix_width, 0, vp.pix_height);
    if (res != Invisible) dc.DrawLine(pixx, pixy, pixx1, pixy1, false);
  }
 
  else  // Use Aux PlyPoints
  {
    wxPoint r, r1;
 
    int nAuxPlyEntries = ChartData->GetnAuxPlyEntries(dbIndex);
    for (int j = 0; j < nAuxPlyEntries; j++) {
      int nAuxPly =
          ChartData->GetDBAuxPlyPoint(dbIndex, 0, j, &plylat, &plylon);
      GetCanvasPointPix(plylat, plylon, &r);
      pixx = r.x;
      pixy = r.y;
 
      for (int i = 0; i < nAuxPly - 1; i++) {
        ChartData->GetDBAuxPlyPoint(dbIndex, i + 1, j, &plylat1, &plylon1);
 
        GetCanvasPointPix(plylat1, plylon1, &r1);
        pixx1 = r1.x;
        pixy1 = r1.y;
 
        int pixxs1 = pixx1;
        int pixys1 = pixy1;
 
        bool b_skip = false;
 
        if (vp.chart_scale > 5e7) {
          //    calculate projected distance between these two points in meters
          double dist = sqrt((double)((pixx1 - pixx) * (pixx1 - pixx)) +
                             ((pixy1 - pixy) * (pixy1 - pixy))) /
                        vp.view_scale_ppm;
          if (dist > 0.0) {
            //    calculate GC distance between these two points in meters
            double distgc =
                DistGreatCircle(plylat, plylon, plylat1, plylon1) * 1852.;
 
            //    If the distances are nonsense, it means that the scale is very
            //    small and the segment wrapped the world So skip it....
            //    TODO improve this to draw two segments
            if (fabs(dist - distgc) > 10000. * 1852.)  // lotsa miles
              b_skip = true;
          } else
            b_skip = true;
        }
 
        ClipResult res = cohen_sutherland_line_clip_i(
            &pixx, &pixy, &pixx1, &pixy1, 0, vp.pix_width, 0, vp.pix_height);
        if (res != Invisible && !b_skip) dc.DrawLine(pixx, pixy, pixx1, pixy1);
 
        plylat = plylat1;
        plylon = plylon1;
        pixx = pixxs1;
        pixy = pixys1;
      }
 
      ChartData->GetDBAuxPlyPoint(dbIndex, 0, j, &plylat1, &plylon1);
      GetCanvasPointPix(plylat1, plylon1, &r1);
      pixx1 = r1.x;
      pixy1 = r1.y;
 
      ClipResult res = cohen_sutherland_line_clip_i(
          &pixx, &pixy, &pixx1, &pixy1, 0, vp.pix_width, 0, vp.pix_height);
      if (res != Invisible) dc.DrawLine(pixx, pixy, pixx1, pixy1, false);
    }
  }
}
 
static void RouteLegInfo(ocpnDC &dc, wxPoint ref_point,
                         const wxArrayString &legend) {
  wxFont *dFont = FontMgr::Get().GetFont(_("RouteLegInfoRollover"));
 
  int pointsize = dFont->GetPointSize();
  pointsize /= OCPN_GetWinDIPScaleFactor();
 
  wxFont *psRLI_font = FontMgr::Get().FindOrCreateFont(
      pointsize, dFont->GetFamily(), dFont->GetStyle(), dFont->GetWeight(),
      false, dFont->GetFaceName());
 
  dc.SetFont(*psRLI_font);
 
  int h = 0;
  int w = 0;
  int hl, wl;
 
  int xp, yp;
  int hilite_offset = 3;
 
  for (wxString line : legend) {
#ifdef __WXMAC__
    wxScreenDC sdc;
    sdc.GetTextExtent(line, &wl, &hl, NULL, NULL, psRLI_font);
#else
    dc.GetTextExtent(line, &wl, &hl);
    hl *= (OCPN_GetWinDIPScaleFactor() * 100.) / 100;
    wl *= (OCPN_GetWinDIPScaleFactor() * 100.) / 100;
#endif
    h += hl;
    w = wxMax(w, wl);
  }
  w += (hl / 2);  // Add a little right pad
 
  xp = ref_point.x - w;
  yp = ref_point.y;
  yp += hilite_offset;
 
  AlphaBlending(dc, xp, yp, w, h, 0.0, GetGlobalColor("YELO1"), 172);
 
  dc.SetPen(wxPen(GetGlobalColor("UBLCK")));
  dc.SetTextForeground(GetGlobalColor("UBLCK"));
 
  for (wxString line : legend) {
    dc.DrawText(line, xp, yp);
    yp += hl;
  }
}
 
void ChartCanvas::RenderShipToActive(ocpnDC &dc, bool Use_Opengl) {
  if (!g_bAllowShipToActive) return;
 
  Route *rt = g_pRouteMan->GetpActiveRoute();
  if (!rt) return;
 
  if (RoutePoint *rp = g_pRouteMan->GetpActivePoint()) {
    wxPoint2DDouble pa, pb;
    GetDoubleCanvasPointPix(gLat, gLon, &pa);
    GetDoubleCanvasPointPix(rp->m_lat, rp->m_lon, &pb);
 
    // set pen
    int width =
        g_pRouteMan->GetRoutePen()->GetWidth();  // get default route pen with
    if (rt->m_width != wxPENSTYLE_INVALID)
      width = rt->m_width;  // set route pen style if any
    wxPenStyle style = (wxPenStyle)::StyleValues[wxMin(
        g_shipToActiveStyle, 5)];  // get setting pen style
    if (style == wxPENSTYLE_INVALID) style = wxPENSTYLE_SOLID;  // default style
    wxColour color =
        g_shipToActiveColor > 0 ? GpxxColors[wxMin(g_shipToActiveColor - 1, 15)]
                                :  // set setting route pen color
            g_pRouteMan->GetActiveRoutePen()->GetColour();  // default color
    wxPen *mypen = wxThePenList->FindOrCreatePen(color, width, style);
 
    dc.SetPen(*mypen);
    dc.SetBrush(wxBrush(color, wxBRUSHSTYLE_SOLID));
 
    if (!Use_Opengl)
      RouteGui(*rt).RenderSegment(dc, (int)pa.m_x, (int)pa.m_y, (int)pb.m_x,
                                  (int)pb.m_y, GetVP(), true);
 
#ifdef ocpnUSE_GL
    else {
#ifdef USE_ANDROID_GLES2
      dc.DrawLine(pa.m_x, pa.m_y, pb.m_x, pb.m_y);
#else
      if (style != wxPENSTYLE_SOLID) {
        if (glChartCanvas::dash_map.find(style) !=
            glChartCanvas::dash_map.end()) {
          mypen->SetDashes(2, &glChartCanvas::dash_map[style][0]);
          dc.SetPen(*mypen);
        }
      }
      dc.DrawLine(pa.m_x, pa.m_y, pb.m_x, pb.m_y);
#endif
 
      RouteGui(*rt).RenderSegmentArrowsGL(dc, (int)pa.m_x, (int)pa.m_y,
                                          (int)pb.m_x, (int)pb.m_y, GetVP());
    }
#endif
  }
}
 
void ChartCanvas::RenderRouteLegs(ocpnDC &dc) {
  Route *route = 0;
  if (m_routeState >= 2) route = m_pMouseRoute;
  if (m_pMeasureRoute && m_bMeasure_Active && (m_nMeasureState >= 2))
    route = m_pMeasureRoute;
 
  if (!route) return;
 
  //      Validate route pointer
  if (!g_pRouteMan->IsRouteValid(route)) return;
 
  double render_lat = m_cursor_lat;
  double render_lon = m_cursor_lon;
 
  int np = route->GetnPoints();
  if (np) {
    if (g_btouch && (np > 1)) np--;
    RoutePoint rp = route->GetPoint(np);
    render_lat = rp.m_lat;
    render_lon = rp.m_lon;
  }
 
  double rhumbBearing, rhumbDist;
  DistanceBearingMercator(m_cursor_lat, m_cursor_lon, render_lat, render_lon,
                          &rhumbBearing, &rhumbDist);
  double brg = rhumbBearing;
  double dist = rhumbDist;
 
  // Skip GreatCircle rubberbanding on touch devices.
  if (!g_btouch) {
    double gcBearing, gcBearing2, gcDist;
    Geodesic::GreatCircleDistBear(render_lon, render_lat, m_cursor_lon,
                                  m_cursor_lat, &gcDist, &gcBearing,
                                  &gcBearing2);
    double gcDistm = gcDist / 1852.0;
 
    if ((render_lat == m_cursor_lat) && (render_lon == m_cursor_lon))
      rhumbBearing = 90.;
 
    wxPoint destPoint, lastPoint;
 
    route->m_NextLegGreatCircle = false;
    int milesDiff = rhumbDist - gcDistm;
    if (milesDiff > 1) {
      brg = gcBearing;
      dist = gcDistm;
      route->m_NextLegGreatCircle = true;
    }
 
    // FIXME  (MacOS, the first segment is rendered wrong)
    RouteGui(*route).DrawPointWhich(dc, this, route->m_lastMousePointIndex,
                                    &lastPoint);
 
    if (route->m_NextLegGreatCircle) {
      for (int i = 1; i <= milesDiff; i++) {
        double p = (double)i * (1.0 / (double)milesDiff);
        double pLat, pLon;
        Geodesic::GreatCircleTravel(render_lon, render_lat, gcDist * p, brg,
                                    &pLon, &pLat, &gcBearing2);
        destPoint = VPoint.GetPixFromLL(pLat, pLon);
        RouteGui(*route).DrawSegment(dc, this, &lastPoint, &destPoint, GetVP(),
                                     false);
        lastPoint = destPoint;
      }
    } else {
      if (r_rband.x && r_rband.y) {  // RubberBand disabled?
        RouteGui(*route).DrawSegment(dc, this, &lastPoint, &r_rband, GetVP(),
                                     false);
        if (m_bMeasure_DistCircle) {
          double distanceRad = sqrtf(powf((float)(r_rband.x - lastPoint.x), 2) +
                                     powf((float)(r_rband.y - lastPoint.y), 2));
 
          dc.SetPen(*g_pRouteMan->GetRoutePen());
          dc.SetBrush(*wxTRANSPARENT_BRUSH);
          dc.StrokeCircle(lastPoint.x, lastPoint.y, distanceRad);
        }
      }
    }
  }
 
  wxString routeInfo;
  wxArrayString infoArray;
  double varBrg = 0;
  if (g_bShowTrue)
    routeInfo << wxString::Format(wxString("%03d%c(T) ", wxConvUTF8), (int)brg,
                                  0x00B0);
 
  if (g_bShowMag) {
    double latAverage = (m_cursor_lat + render_lat) / 2;
    double lonAverage = (m_cursor_lon + render_lon) / 2;
    varBrg = gFrame->GetMag(brg, latAverage, lonAverage);
 
    routeInfo << wxString::Format(wxString("%03d%c(M) ", wxConvUTF8),
                                  (int)varBrg, 0x00B0);
  }
  routeInfo << " " << FormatDistanceAdaptive(dist);
  infoArray.Add(routeInfo);
  routeInfo.Clear();
 
  // To make it easier to use a route as a bearing on a charted object add for
  // the first leg also the reverse bearing.
  if (np == 1) {
    routeInfo << "Reverse: ";
    if (g_bShowTrue)
      routeInfo << wxString::Format(wxString("%03d%c(T) ", wxConvUTF8),
                                    (int)(brg + 180.) % 360, 0x00B0);
    if (g_bShowMag)
      routeInfo << wxString::Format(wxString("%03d%c(M) ", wxConvUTF8),
                                    (int)(varBrg + 180.) % 360, 0x00B0);
    infoArray.Add(routeInfo);
    routeInfo.Clear();
  }
 
  wxString s0;
  if (!route->m_bIsInLayer)
    s0.Append(_("Route") + ": ");
  else
    s0.Append(_("Layer Route: "));
 
  double disp_length = route->m_route_length;
  if (!g_btouch) disp_length += dist;  // Add in the to-be-created leg.
  s0 += FormatDistanceAdaptive(disp_length);
 
  infoArray.Add(s0);
  routeInfo.Clear();
 
  RouteLegInfo(dc, r_rband, infoArray);
 
  m_brepaint_piano = true;
}
 
void ChartCanvas::RenderVisibleSectorLights(ocpnDC &dc) {
  if (!m_bShowVisibleSectors) return;
 
  if (g_bDeferredInitDone) {
    // need to re-evaluate sectors?
    double rhumbBearing, rhumbDist;
    DistanceBearingMercator(gLat, gLon, m_sector_glat, m_sector_glon,
                            &rhumbBearing, &rhumbDist);
 
    if (rhumbDist > 0.05)  // miles
    {
      s57_GetVisibleLightSectors(this, gLat, gLon, GetVP(),
                                 m_sectorlegsVisible);
      m_sector_glat = gLat;
      m_sector_glon = gLon;
    }
    s57_DrawExtendedLightSectors(dc, VPoint, m_sectorlegsVisible);
  }
}
 
void ChartCanvas::WarpPointerDeferred(int x, int y) {
  warp_x = x;
  warp_y = y;
  warp_flag = true;
}
 
int s_msg;
 
void ChartCanvas::UpdateCanvasS52PLIBConfig() {
  if (!ps52plib) return;
 
  if (VPoint.b_quilt) {                                // quilted
    if (!m_pQuilt || !m_pQuilt->IsComposed()) return;  // not ready
 
    if (m_pQuilt->IsQuiltVector()) {
      if (ps52plib->GetStateHash() != m_s52StateHash) {
        UpdateS52State();
        m_s52StateHash = ps52plib->GetStateHash();
      }
    }
  } else {
    if (ps52plib->GetStateHash() != m_s52StateHash) {
      UpdateS52State();
      m_s52StateHash = ps52plib->GetStateHash();
    }
  }
 
  // Plugin charts
  bool bSendPlibState = true;
  if (VPoint.b_quilt) {  // quilted
    if (!m_pQuilt->DoesQuiltContainPlugins()) bSendPlibState = false;
  }
 
  if (bSendPlibState) {
    wxJSONValue v;
    v["OpenCPN Version Major"] = VERSION_MAJOR;
    v["OpenCPN Version Minor"] = VERSION_MINOR;
    v["OpenCPN Version Patch"] = VERSION_PATCH;
    v["OpenCPN Version Date"] = VERSION_DATE;
    v["OpenCPN Version Full"] = VERSION_FULL;
 
    //  S52PLIB state
    v["OpenCPN S52PLIB ShowText"] = GetShowENCText();
    v["OpenCPN S52PLIB ShowSoundings"] = GetShowENCDepth();
    v["OpenCPN S52PLIB ShowLights"] = GetShowENCLights();
    v["OpenCPN S52PLIB ShowAnchorConditions"] = m_encShowAnchor;
    v["OpenCPN S52PLIB ShowQualityOfData"] = GetShowENCDataQual();
    v["OpenCPN S52PLIB ShowATONLabel"] = GetShowENCBuoyLabels();
    v["OpenCPN S52PLIB ShowLightDescription"] = GetShowENCLightDesc();
 
    v["OpenCPN S52PLIB DisplayCategory"] = GetENCDisplayCategory();
 
    v["OpenCPN S52PLIB SoundingsFactor"] = g_ENCSoundingScaleFactor;
    v["OpenCPN S52PLIB TextFactor"] = g_ENCTextScaleFactor;
 
    // Global S52 options
 
    v["OpenCPN S52PLIB MetaDisplay"] = ps52plib->m_bShowMeta;
    v["OpenCPN S52PLIB DeclutterText"] = ps52plib->m_bDeClutterText;
    v["OpenCPN S52PLIB ShowNationalText"] = ps52plib->m_bShowNationalTexts;
    v["OpenCPN S52PLIB ShowImportantTextOnly"] =
        ps52plib->m_bShowS57ImportantTextOnly;
    v["OpenCPN S52PLIB UseSCAMIN"] = ps52plib->m_bUseSCAMIN;
    v["OpenCPN S52PLIB UseSUPER_SCAMIN"] = ps52plib->m_bUseSUPER_SCAMIN;
    v["OpenCPN S52PLIB SymbolStyle"] = ps52plib->m_nSymbolStyle;
    v["OpenCPN S52PLIB BoundaryStyle"] = ps52plib->m_nBoundaryStyle;
    v["OpenCPN S52PLIB ColorShades"] = S52_getMarinerParam(S52_MAR_TWO_SHADES);
 
    // Some global GUI parameters, for completeness
    v["OpenCPN Zoom Mod Vector"] = g_chart_zoom_modifier_vector;
    v["OpenCPN Zoom Mod Other"] = g_chart_zoom_modifier_raster;
    v["OpenCPN Scale Factor Exp"] =
        g_Platform->GetChartScaleFactorExp(g_ChartScaleFactor);
    v["OpenCPN Display Width"] = (int)g_display_size_mm;
 
    wxJSONWriter w;
    wxString out;
    w.Write(v, out);
 
    if (!g_lastS52PLIBPluginMessage.IsSameAs(out)) {
      SendMessageToAllPlugins(wxString("OpenCPN Config"), out);
      g_lastS52PLIBPluginMessage = out;
    }
  }
}
int spaint;
int s_in_update;
void ChartCanvas::OnPaint(wxPaintEvent &event) {
  wxPaintDC dc(this);
 
  // GetToolbar()->Show( m_bToolbarEnable );
 
  //  Paint updates may have been externally disabled (temporarily, to avoid
  //  Yield() recursion performance loss) It is important that the wxPaintDC is
  //  built, even if we elect to not process this paint message. Otherwise, the
  //  paint message may not be removed from the message queue, esp on Windows.
  //  (FS#1213) This would lead to a deadlock condition in ::wxYield()
 
  if (!m_b_paint_enable) {
    return;
  }
 
  //  If necessary, reconfigure the S52 PLIB
 
#ifdef ocpnUSE_GL
  if (!g_bdisable_opengl && m_glcc) m_glcc->Show(g_bopengl);
 
  if (m_glcc && g_bopengl) {
    if (!s_in_update) {  // no recursion allowed, seen on lo-spec Mac
      s_in_update++;
      m_glcc->Update();
      s_in_update--;
    }
 
    return;
  }
#endif
 
  if ((GetVP().pix_width == 0) || (GetVP().pix_height == 0)) return;
 
  wxRegion ru = GetUpdateRegion();
 
  int rx, ry, rwidth, rheight;
  ru.GetBox(rx, ry, rwidth, rheight);
 
#ifdef ocpnUSE_DIBSECTION
  ocpnMemDC temp_dc;
#else
  wxMemoryDC temp_dc;
#endif
 
  long height = GetVP().pix_height;
 
#ifdef __WXMAC__
  // On OS X we have to explicitly extend the region for the piano area
  ocpnStyle::Style *style = g_StyleManager->GetCurrentStyle();
  if (!style->chartStatusWindowTransparent && g_bShowChartBar)
    height += m_Piano->GetHeight();
#endif  // __WXMAC__
  wxRegion rgn_chart(0, 0, GetVP().pix_width, height);
 
  //    In case Thumbnail is shown, set up dc clipper and blt iterator regions
  if (pthumbwin) {
    int thumbx, thumby, thumbsx, thumbsy;
    pthumbwin->GetPosition(&thumbx, &thumby);
    pthumbwin->GetSize(&thumbsx, &thumbsy);
    wxRegion rgn_thumbwin(thumbx, thumby, thumbsx - 1, thumbsy - 1);
 
    if (pthumbwin->IsShown()) {
      rgn_chart.Subtract(rgn_thumbwin);
      ru.Subtract(rgn_thumbwin);
    }
  }
 
  // subtract the chart bar if it isn't transparent, and determine if we need to
  // paint it
  wxRegion rgn_blit = ru;
  if (g_bShowChartBar) {
    wxRect chart_bar_rect(0, GetClientSize().y - m_Piano->GetHeight(),
                          GetClientSize().x, m_Piano->GetHeight());
 
    ocpnStyle::Style *style = g_StyleManager->GetCurrentStyle();
    if (ru.Contains(chart_bar_rect) != wxOutRegion) {
      if (style->chartStatusWindowTransparent)
        m_brepaint_piano = true;
      else
        ru.Subtract(chart_bar_rect);
    }
  }
 
  if (m_Compass && m_Compass->IsShown()) {
    wxRect compassRect = m_Compass->GetRect();
    if (ru.Contains(compassRect) != wxOutRegion) {
      ru.Subtract(compassRect);
    }
  }
 
  if (m_notification_button) {
    wxRect noteRect = m_notification_button->GetRect();
    if (ru.Contains(noteRect) != wxOutRegion) {
      ru.Subtract(noteRect);
    }
  }
 
  //  Is this viewpoint the same as the previously painted one?
  bool b_newview = true;
 
  if ((m_cache_vp.view_scale_ppm == VPoint.view_scale_ppm) &&
      (m_cache_vp.rotation == VPoint.rotation) &&
      (m_cache_vp.clat == VPoint.clat) && (m_cache_vp.clon == VPoint.clon) &&
      m_cache_vp.IsValid()) {
    b_newview = false;
  }
 
  //  If the ViewPort is skewed or rotated, we may be able to use the cached
  //  rotated bitmap.
  bool b_rcache_ok = false;
  if (fabs(VPoint.skew) > 0.01 || fabs(VPoint.rotation) > 0.01)
    b_rcache_ok = !b_newview;
 
  //  Make a special VP
  if (VPoint.b_MercatorProjectionOverride)
    VPoint.SetProjectionType(PROJECTION_MERCATOR);
  ViewPort svp = VPoint;
 
  svp.pix_width = svp.rv_rect.width;
  svp.pix_height = svp.rv_rect.height;
 
  //        printf("Onpaint pix %d %d\n", VPoint.pix_width, VPoint.pix_height);
  //        printf("OnPaint rv_rect %d %d\n", VPoint.rv_rect.width,
  //        VPoint.rv_rect.height);
 
  OCPNRegion chart_get_region(wxRect(0, 0, svp.pix_width, svp.pix_height));
 
  //  If we are going to use the cached rotated image, there is no need to fetch
  //  any chart data and this will do it...
  if (b_rcache_ok) chart_get_region.Clear();
 
  //  Blit pan acceleration
  if (VPoint.b_quilt)  // quilted
  {
    if (!m_pQuilt || !m_pQuilt->IsComposed()) return;  // not ready
 
    bool bvectorQuilt = m_pQuilt->IsQuiltVector();
 
    bool busy = false;
    if (bvectorQuilt && (m_cache_vp.view_scale_ppm != VPoint.view_scale_ppm ||
                         m_cache_vp.rotation != VPoint.rotation)) {
      AbstractPlatform::ShowBusySpinner();
      busy = true;
    }
 
    if ((m_working_bm.GetWidth() != svp.pix_width) ||
        (m_working_bm.GetHeight() != svp.pix_height))
      m_working_bm.Create(svp.pix_width, svp.pix_height,
                          -1);  // make sure the target is big enoug
 
    if (fabs(VPoint.rotation) < 0.01) {
      bool b_save = true;
 
      if (g_SencThreadManager) {
        if (g_SencThreadManager->GetJobCount()) {
          b_save = false;
          m_cache_vp.Invalidate();
        }
      }
 
      //  If the saved wxBitmap from last OnPaint is useable
      //  calculate the blit parameters
 
      //  We can only do screen blit painting if subsequent ViewPorts differ by
      //  whole pixels So, in small scale bFollow mode, force the full screen
      //  render. This seems a hack....There may be better logic here.....
 
      //                  if(m_bFollow)
      //                        b_save = false;
 
      if (m_bm_cache_vp.IsValid() && m_cache_vp.IsValid() /*&& !m_bFollow*/) {
        if (b_newview) {
          wxPoint c_old = VPoint.GetPixFromLL(VPoint.clat, VPoint.clon);
          wxPoint c_new = m_bm_cache_vp.GetPixFromLL(VPoint.clat, VPoint.clon);
 
          int dy = c_new.y - c_old.y;
          int dx = c_new.x - c_old.x;
 
          //                              printf("In OnPaint Trying Blit dx: %d
          //                              dy:%d\n\n", dx, dy);
 
          if (m_pQuilt->IsVPBlittable(VPoint, dx, dy, true)) {
            if (dx || dy) {
              //  Blit the reuseable portion of the cached wxBitmap to a working
              //  bitmap
              temp_dc.SelectObject(m_working_bm);
 
              wxMemoryDC cache_dc;
              cache_dc.SelectObject(m_cached_chart_bm);
 
              if (dy > 0) {
                if (dx > 0) {
                  temp_dc.Blit(0, 0, VPoint.pix_width - dx,
                               VPoint.pix_height - dy, &cache_dc, dx, dy);
                } else {
                  temp_dc.Blit(-dx, 0, VPoint.pix_width + dx,
                               VPoint.pix_height - dy, &cache_dc, 0, dy);
                }
 
              } else {
                if (dx > 0) {
                  temp_dc.Blit(0, -dy, VPoint.pix_width - dx,
                               VPoint.pix_height + dy, &cache_dc, dx, 0);
                } else {
                  temp_dc.Blit(-dx, -dy, VPoint.pix_width + dx,
                               VPoint.pix_height + dy, &cache_dc, 0, 0);
                }
              }
 
              OCPNRegion update_region;
              if (dy) {
                if (dy > 0)
                  update_region.Union(
                      wxRect(0, VPoint.pix_height - dy, VPoint.pix_width, dy));
                else
                  update_region.Union(wxRect(0, 0, VPoint.pix_width, -dy));
              }
 
              if (dx) {
                if (dx > 0)
                  update_region.Union(
                      wxRect(VPoint.pix_width - dx, 0, dx, VPoint.pix_height));
                else
                  update_region.Union(wxRect(0, 0, -dx, VPoint.pix_height));
              }
 
              //  Render the new region
              m_pQuilt->RenderQuiltRegionViewOnDCNoText(temp_dc, svp,
                                                        update_region);
              cache_dc.SelectObject(wxNullBitmap);
            } else {
              //    No sensible (dx, dy) change in the view, so use the cached
              //    member bitmap
              temp_dc.SelectObject(m_cached_chart_bm);
              b_save = false;
            }
            m_pQuilt->ComputeRenderRegion(svp, chart_get_region);
 
          } else  // not blitable
          {
            temp_dc.SelectObject(m_working_bm);
            m_pQuilt->RenderQuiltRegionViewOnDCNoText(temp_dc, svp,
                                                      chart_get_region);
          }
        } else {
          //    No change in the view, so use the cached member bitmap2
          temp_dc.SelectObject(m_cached_chart_bm);
          b_save = false;
        }
      } else  // cached bitmap is not yet valid
      {
        temp_dc.SelectObject(m_working_bm);
        m_pQuilt->RenderQuiltRegionViewOnDCNoText(temp_dc, svp,
                                                  chart_get_region);
      }
 
      //  Save the fully rendered quilt image as a wxBitmap member of this class
      if (b_save) {
        //                        if((m_cached_chart_bm.GetWidth() !=
        //                        svp.pix_width) ||
        //                        (m_cached_chart_bm.GetHeight() !=
        //                        svp.pix_height))
        //                              m_cached_chart_bm.Create(svp.pix_width,
        //                              svp.pix_height, -1); // target wxBitmap
        //                              is big enough
        wxMemoryDC scratch_dc_0;
        scratch_dc_0.SelectObject(m_cached_chart_bm);
        scratch_dc_0.Blit(0, 0, svp.pix_width, svp.pix_height, &temp_dc, 0, 0);
 
        scratch_dc_0.SelectObject(wxNullBitmap);
 
        m_bm_cache_vp =
            VPoint;  // save the ViewPort associated with the cached wxBitmap
      }
    }
 
    else  // quilted, rotated
    {
      temp_dc.SelectObject(m_working_bm);
      OCPNRegion chart_get_all_region(
          wxRect(0, 0, svp.pix_width, svp.pix_height));
      m_pQuilt->RenderQuiltRegionViewOnDCNoText(temp_dc, svp,
                                                chart_get_all_region);
    }
 
    AbstractPlatform::HideBusySpinner();
 
  }
 
  else  // not quilted
  {
    if (!m_singleChart) {
      dc.SetBackground(wxBrush(*wxLIGHT_GREY));
      dc.Clear();
      return;
    }
 
    if (!chart_get_region.IsEmpty()) {
      m_singleChart->RenderRegionViewOnDC(temp_dc, svp, chart_get_region);
    }
  }
 
  if (temp_dc.IsOk()) {
    //    Arrange to render the World Chart vector data behind the rendered
    //    current chart so that uncovered canvas areas show at least the world
    //    chart.
    OCPNRegion chartValidRegion;
    if (!VPoint.b_quilt) {
      // Make a region covering the current chart on the canvas
 
      if (m_singleChart->GetChartFamily() == CHART_FAMILY_VECTOR)
        m_singleChart->GetValidCanvasRegion(svp, &chartValidRegion);
      else {
        // The raster calculations  in ChartBaseBSB::ComputeSourceRectangle
        // require that the viewport passed here have pix_width and pix_height
        // set to the actual display, not the virtual (rv_rect) sizes
        // (the vector calculations require the virtual sizes in svp)
 
        m_singleChart->GetValidCanvasRegion(VPoint, &chartValidRegion);
        chartValidRegion.Offset(-VPoint.rv_rect.x, -VPoint.rv_rect.y);
      }
    } else
      chartValidRegion = m_pQuilt->GetFullQuiltRenderedRegion();
 
    temp_dc.DestroyClippingRegion();
 
    //    Copy current chart region
    OCPNRegion backgroundRegion(wxRect(0, 0, svp.pix_width, svp.pix_height));
 
    if (chartValidRegion.IsOk()) backgroundRegion.Subtract(chartValidRegion);
 
    if (!backgroundRegion.IsEmpty()) {
      //    Draw the Background Chart only in the areas NOT covered by the
      //    current chart view
 
      /* unfortunately wxDC::DrawRectangle and wxDC::Clear do not respect
         clipping regions with more than 1 rectangle so... */
      wxColour water = pWorldBackgroundChart->water;
      if (water.IsOk()) {
        temp_dc.SetPen(*wxTRANSPARENT_PEN);
        temp_dc.SetBrush(wxBrush(water));
        OCPNRegionIterator upd(backgroundRegion);  // get the update rect list
        while (upd.HaveRects()) {
          wxRect rect = upd.GetRect();
          temp_dc.DrawRectangle(rect);
          upd.NextRect();
        }
      }
      //    Associate with temp_dc
      wxRegion *clip_region = backgroundRegion.GetNew_wxRegion();
      temp_dc.SetDeviceClippingRegion(*clip_region);
      delete clip_region;
 
      ocpnDC bgdc(temp_dc);
      double r = VPoint.rotation;
      SetVPRotation(VPoint.skew);
 
      // pWorldBackgroundChart->RenderViewOnDC(bgdc, VPoint);
      gShapeBasemap.RenderViewOnDC(bgdc, VPoint);
 
      SetVPRotation(r);
    }
  }  // temp_dc.IsOk();
 
  wxMemoryDC *pChartDC = &temp_dc;
  wxMemoryDC rotd_dc;
 
  if (((fabs(GetVP().rotation) > 0.01)) || (fabs(GetVP().skew) > 0.01)) {
    //  Can we use the current rotated image cache?
    if (!b_rcache_ok) {
#ifdef __WXMSW__
      wxMemoryDC tbase_dc;
      wxBitmap bm_base(svp.pix_width, svp.pix_height, -1);
      tbase_dc.SelectObject(bm_base);
      tbase_dc.Blit(0, 0, svp.pix_width, svp.pix_height, &temp_dc, 0, 0);
      tbase_dc.SelectObject(wxNullBitmap);
#else
      const wxBitmap &bm_base = temp_dc.GetSelectedBitmap();
#endif
 
      wxImage base_image;
      if (bm_base.IsOk()) base_image = bm_base.ConvertToImage();
 
      //    Use a local static image rotator to improve wxWidgets code profile
      //    Especially, on GTK the wxRound and wxRealPoint functions are very
      //    expensive.....
 
      double angle = GetVP().skew - GetVP().rotation;
      wxImage ri;
      bool b_rot_ok = false;
      if (base_image.IsOk()) {
        ViewPort rot_vp = GetVP();
 
        m_b_rot_hidef = false;
 
        ri = Image_Rotate(
            base_image, angle,
            wxPoint(GetVP().rv_rect.width / 2, GetVP().rv_rect.height / 2),
            m_b_rot_hidef, &m_roffset);
 
        if ((rot_vp.view_scale_ppm == VPoint.view_scale_ppm) &&
            (rot_vp.rotation == VPoint.rotation) &&
            (rot_vp.clat == VPoint.clat) && (rot_vp.clon == VPoint.clon) &&
            rot_vp.IsValid() && (ri.IsOk())) {
          b_rot_ok = true;
        }
      }
 
      if (b_rot_ok) {
        delete m_prot_bm;
        m_prot_bm = new wxBitmap(ri);
      }
 
      m_roffset.x += VPoint.rv_rect.x;
      m_roffset.y += VPoint.rv_rect.y;
    }
 
    if (m_prot_bm && m_prot_bm->IsOk()) {
      rotd_dc.SelectObject(*m_prot_bm);
      pChartDC = &rotd_dc;
    } else {
      pChartDC = &temp_dc;
      m_roffset = wxPoint(0, 0);
    }
  } else {  // unrotated
    pChartDC = &temp_dc;
    m_roffset = wxPoint(0, 0);
  }
 
  wxPoint offset = m_roffset;
 
  //        Save the PixelCache viewpoint for next time
  m_cache_vp = VPoint;
 
  //    Set up a scratch DC for overlay objects
  wxMemoryDC mscratch_dc;
  mscratch_dc.SelectObject(*pscratch_bm);
 
  mscratch_dc.ResetBoundingBox();
  mscratch_dc.DestroyClippingRegion();
  mscratch_dc.SetDeviceClippingRegion(rgn_chart);
 
  //    Blit the externally invalidated areas of the chart onto the scratch dc
  wxRegionIterator upd(rgn_blit);  // get the update rect list
  while (upd) {
    wxRect rect = upd.GetRect();
 
    mscratch_dc.Blit(rect.x, rect.y, rect.width, rect.height, pChartDC,
                     rect.x - offset.x, rect.y - offset.y);
    upd++;
  }
 
  // If multi-canvas, indicate which canvas has keyboard focus
  // by drawing a simple blue bar at the top.
  if (m_show_focus_bar && (g_canvasConfig != 0)) {  // multi-canvas?
    if (this == wxWindow::FindFocus()) {
      g_focusCanvas = this;
 
      wxColour colour = GetGlobalColor("BLUE4");
      mscratch_dc.SetPen(wxPen(colour));
      mscratch_dc.SetBrush(wxBrush(colour));
 
      wxRect activeRect(0, 0, GetClientSize().x, m_focus_indicator_pix);
      mscratch_dc.DrawRectangle(activeRect);
    }
  }
 
  // Any MBtiles?
  std::vector<int> stackIndexArray = m_pQuilt->GetExtendedStackIndexArray();
  unsigned int im = stackIndexArray.size();
  if (VPoint.b_quilt && im > 0) {
    std::vector<int> tiles_to_show;
    for (unsigned int is = 0; is < im; is++) {
      const ChartTableEntry &cte =
          ChartData->GetChartTableEntry(stackIndexArray[is]);
      if (IsTileOverlayIndexInNoShow(stackIndexArray[is])) {
        continue;
      }
      if (cte.GetChartType() == CHART_TYPE_MBTILES) {
        tiles_to_show.push_back(stackIndexArray[is]);
      }
    }
 
    if (tiles_to_show.size())
      SetAlertString(_("MBTile requires OpenGL to be enabled"));
  }
 
  // May get an unexpected OnPaint call while switching display modes
  // Guard for that.
  if (!g_bopengl) {
    ocpnDC scratch_dc(mscratch_dc);
    RenderAlertMessage(mscratch_dc, GetVP());
  }
 
#if 0
  // quiting?
  if (g_bquiting) {
#ifdef ocpnUSE_DIBSECTION
    ocpnMemDC q_dc;
#else
    wxMemoryDC q_dc;
#endif
    wxBitmap qbm(GetVP().pix_width, GetVP().pix_height);
    q_dc.SelectObject(qbm);
 
    // Get a copy of the screen
    q_dc.Blit(0, 0, GetVP().pix_width, GetVP().pix_height, &mscratch_dc, 0, 0);
 
    //  Draw a rectangle over the screen with a stipple brush
    wxBrush qbr(*wxBLACK, wxBRUSHSTYLE_FDIAGONAL_HATCH);
    q_dc.SetBrush(qbr);
    q_dc.DrawRectangle(0, 0, GetVP().pix_width, GetVP().pix_height);
 
    // Blit back into source
    mscratch_dc.Blit(0, 0, GetVP().pix_width, GetVP().pix_height, &q_dc, 0, 0,
                     wxCOPY);
 
    q_dc.SelectObject(wxNullBitmap);
  }
#endif
 
#if 0
    //  It is possible that this two-step method may be reuired for some platforms.
    //  So, retain in the code base to aid recovery if necessary
 
    // Create and Render the Vector quilt decluttered text overlay, omitting CM93 composite
    if( VPoint.b_quilt ) {
        if(m_pQuilt->IsQuiltVector() && ps52plib && ps52plib->GetShowS57Text()){
            ChartBase *chart = m_pQuilt->GetRefChart();
            if( chart && chart->GetChartType() != CHART_TYPE_CM93COMP){
 
                //        Clear the text Global declutter list
                ChartPlugInWrapper *ChPI = dynamic_cast<ChartPlugInWrapper*>( chart );
                if(ChPI)
                    ChPI->ClearPLIBTextList();
                else{
                    if(ps52plib)
                        ps52plib->ClearTextList();
                }
 
                wxMemoryDC t_dc;
                wxBitmap qbm(  GetVP().pix_width, GetVP().pix_height );
 
                wxColor maskBackground = wxColour(1,0,0);
                t_dc.SelectObject( qbm );
                t_dc.SetBackground(wxBrush(maskBackground));
                t_dc.Clear();
 
                //  Copy the scratch DC into the new bitmap
                t_dc.Blit( 0, 0, GetVP().pix_width, GetVP().pix_height, scratch_dc.GetDC(), 0, 0, wxCOPY );
 
                //  Render the text to the new bitmap
                OCPNRegion chart_all_text_region( wxRect( 0, 0, GetVP().pix_width, GetVP().pix_height ) );
                m_pQuilt->RenderQuiltRegionViewOnDCTextOnly( t_dc, svp, chart_all_text_region );
 
                //  Copy the new bitmap back to the scratch dc
                wxRegionIterator upd_final( ru );
                while( upd_final ) {
                    wxRect rect = upd_final.GetRect();
                    scratch_dc.GetDC()->Blit( rect.x, rect.y, rect.width, rect.height, &t_dc, rect.x, rect.y, wxCOPY, true );
                    upd_final++;
                }
 
                t_dc.SelectObject( wxNullBitmap );
            }
        }
    }
#endif
  // Direct rendering model...
  if (VPoint.b_quilt) {
    if (m_pQuilt->IsQuiltVector() && ps52plib && ps52plib->GetShowS57Text()) {
      ChartBase *chart = m_pQuilt->GetRefChart();
      if (chart && chart->GetChartType() != CHART_TYPE_CM93COMP) {
        //        Clear the text Global declutter list
        ChartPlugInWrapper *ChPI = dynamic_cast<ChartPlugInWrapper *>(chart);
        if (ChPI)
          ChPI->ClearPLIBTextList();
        else {
          if (ps52plib) ps52plib->ClearTextList();
        }
 
        //  Render the text directly to the scratch bitmap
        OCPNRegion chart_all_text_region(
            wxRect(0, 0, GetVP().pix_width, GetVP().pix_height));
 
        if (g_bShowChartBar && m_Piano) {
          wxRect chart_bar_rect(0, GetVP().pix_height - m_Piano->GetHeight(),
                                GetVP().pix_width, m_Piano->GetHeight());
 
          ocpnStyle::Style *style = g_StyleManager->GetCurrentStyle();
          if (!style->chartStatusWindowTransparent)
            chart_all_text_region.Subtract(chart_bar_rect);
        }
 
        if (m_Compass && m_Compass->IsShown()) {
          wxRect compassRect = m_Compass->GetRect();
          if (chart_all_text_region.Contains(compassRect) != wxOutRegion) {
            chart_all_text_region.Subtract(compassRect);
          }
        }
 
        mscratch_dc.DestroyClippingRegion();
 
        m_pQuilt->RenderQuiltRegionViewOnDCTextOnly(mscratch_dc, svp,
                                                    chart_all_text_region);
      }
    }
  }
 
  //  Now that charts are fully rendered, apply the overlay objects as decals.
  ocpnDC scratch_dc(mscratch_dc);
  DrawOverlayObjects(scratch_dc, ru);
 
  //    And finally, blit the scratch dc onto the physical dc
  wxRegionIterator upd_final(rgn_blit);
  while (upd_final) {
    wxRect rect = upd_final.GetRect();
    dc.Blit(rect.x, rect.y, rect.width, rect.height, &mscratch_dc, rect.x,
            rect.y);
    upd_final++;
  }
 
  //    Deselect the chart bitmap from the temp_dc, so that it will not be
  //    destroyed in the temp_dc dtor
  temp_dc.SelectObject(wxNullBitmap);
  //    And for the scratch bitmap
  mscratch_dc.SelectObject(wxNullBitmap);
 
  dc.DestroyClippingRegion();
 
  PaintCleanup();
}
 
void ChartCanvas::PaintCleanup() {
  //    Handle the current graphic window, if present
  if (m_inPinch) return;
 
  if (pCwin) {
    pCwin->Show();
    if (m_bTCupdate) {
      pCwin->Refresh();
      pCwin->Update();
    }
  }
 
  //    And set flags for next time
  m_bTCupdate = false;
 
  //    Handle deferred WarpPointer
  if (warp_flag) {
    WarpPointer(warp_x, warp_y);
    warp_flag = false;
  }
 
  // Start movement timers, this runs nearly immediately.
  // the reason we cannot simply call it directly is the
  // refresh events it emits may be blocked from this paint event
  pMovementTimer->Start(1, wxTIMER_ONE_SHOT);
  m_VPMovementTimer.Start(1, wxTIMER_ONE_SHOT);
}
 
#if 0
wxColour GetErrorGraphicColor(double val)
{
    /*
     double valm = wxMin(val_max, val);
 
     unsigned char green = (unsigned char)(255 * (1 - (valm/val_max)));
     unsigned char red   = (unsigned char)(255 * (valm/val_max));
 
     wxImage::HSVValue hv = wxImage::RGBtoHSV(wxImage::RGBValue(red, green, 0));
 
     hv.saturation = 1.0;
     hv.value = 1.0;
 
     wxImage::RGBValue rv = wxImage::HSVtoRGB(hv);
     return wxColour(rv.red, rv.green, rv.blue);
     */
 
    //    HTML colors taken from NOAA WW3 Web representation
    wxColour c;
    if((val > 0) && (val < 1)) c.Set("#002ad9");
    else if((val >= 1) && (val < 2)) c.Set("#006ed9");
    else if((val >= 2) && (val < 3)) c.Set("#00b2d9");
    else if((val >= 3) && (val < 4)) c.Set("#00d4d4");
    else if((val >= 4) && (val < 5)) c.Set("#00d9a6");
    else if((val >= 5) && (val < 7)) c.Set("#00d900");
    else if((val >= 7) && (val < 9)) c.Set("#95d900");
    else if((val >= 9) && (val < 12)) c.Set("#d9d900");
    else if((val >= 12) && (val < 15)) c.Set("#d9ae00");
    else if((val >= 15) && (val < 18)) c.Set("#d98300");
    else if((val >= 18) && (val < 21)) c.Set("#d95700");
    else if((val >= 21) && (val < 24)) c.Set("#d90000");
    else if((val >= 24) && (val < 27)) c.Set("#ae0000");
    else if((val >= 27) && (val < 30)) c.Set("#8c0000");
    else if((val >= 30) && (val < 36)) c.Set("#870000");
    else if((val >= 36) && (val < 42)) c.Set("#690000");
    else if((val >= 42) && (val < 48)) c.Set("#550000");
    else if( val >= 48) c.Set("#410000");
 
    return c;
}
 
void ChartCanvas::RenderGeorefErrorMap( wxMemoryDC *pmdc, ViewPort *vp)
{
    wxImage gr_image(vp->pix_width, vp->pix_height);
    gr_image.InitAlpha();
 
    double maxval = -10000;
    double minval = 10000;
 
    double rlat, rlon;
    double glat, glon;
 
    GetCanvasPixPoint(0, 0, rlat, rlon);
 
    for(int i=1; i < vp->pix_height-1; i++)
    {
        for(int j=0; j < vp->pix_width; j++)
        {
            // Reference mercator value
//                  vp->GetMercatorLLFromPix(wxPoint(j, i), &rlat, &rlon);
 
            // Georef value
            GetCanvasPixPoint(j, i, glat, glon);
 
            maxval = wxMax(maxval, (glat - rlat));
            minval = wxMin(minval, (glat - rlat));
 
        }
        rlat = glat;
    }
 
    GetCanvasPixPoint(0, 0, rlat, rlon);
    for(int i=1; i < vp->pix_height-1; i++)
    {
        for(int j=0; j < vp->pix_width; j++)
        {
            // Reference mercator value
//                  vp->GetMercatorLLFromPix(wxPoint(j, i), &rlat, &rlon);
 
            // Georef value
            GetCanvasPixPoint(j, i, glat, glon);
 
            double f = ((glat - rlat)-minval)/(maxval - minval);
 
            double dy = (f * 40);
 
            wxColour c = GetErrorGraphicColor(dy);
            unsigned char r = c.Red();
            unsigned char g = c.Green();
            unsigned char b = c.Blue();
 
            gr_image.SetRGB(j, i, r,g,b);
            if((glat - rlat )!= 0)
                gr_image.SetAlpha(j, i, 128);
            else
                gr_image.SetAlpha(j, i, 255);
 
        }
        rlat = glat;
    }
 
    //    Create a Bitmap
    wxBitmap *pbm = new wxBitmap(gr_image);
    wxMask *gr_mask = new wxMask(*pbm, wxColour(0,0,0));
    pbm->SetMask(gr_mask);
 
    pmdc->DrawBitmap(*pbm, 0,0);
 
    delete pbm;
 
}
 
#endif
 
void ChartCanvas::CancelMouseRoute() {
  m_routeState = 0;
  m_pMouseRoute = NULL;
  m_bDrawingRoute = false;
}
 
int ChartCanvas::GetNextContextMenuId() {
  return CanvasMenuHandler::GetNextContextMenuId();
}
 
bool ChartCanvas::SetCursor(const wxCursor &c) {
#ifdef ocpnUSE_GL
  if (g_bopengl && m_glcc)
    return m_glcc->SetCursor(c);
  else
#endif
    return wxWindow::SetCursor(c);
}
 
void ChartCanvas::Refresh(bool eraseBackground, const wxRect *rect) {
  if (g_bquiting) return;
  //  Keep the mouse position members up to date
  GetCanvasPixPoint(mouse_x, mouse_y, m_cursor_lat, m_cursor_lon);
 
  //      Retrigger the route leg popup timer
  //      This handles the case when the chart is moving in auto-follow mode,
  //      but no user mouse input is made. The timer handler may Hide() the
  //      popup if the chart moved enough n.b.  We use slightly longer oneshot
  //      value to allow this method's Refresh() to complete before potentially
  //      getting another Refresh() in the popup timer handler.
  if (!m_RolloverPopupTimer.IsRunning() &&
      ((m_pRouteRolloverWin && m_pRouteRolloverWin->IsActive()) ||
       (m_pTrackRolloverWin && m_pTrackRolloverWin->IsActive()) ||
       (m_pAISRolloverWin && m_pAISRolloverWin->IsActive())))
    m_RolloverPopupTimer.Start(500, wxTIMER_ONE_SHOT);
 
#ifdef ocpnUSE_GL
  if (m_glcc && g_bopengl) {
    //      We need to invalidate the FBO cache to ensure repaint of "grounded"
    //      overlay objects.
    if (eraseBackground && m_glcc->UsingFBO()) m_glcc->Invalidate();
 
    m_glcc->Refresh(eraseBackground,
                    NULL);  // We always are going to render the entire screen
                            // anyway, so make
    // sure that the window managers understand the invalid area
    // is actually the entire client area.
 
    //  We need to selectively Refresh some child windows, if they are visible.
    //  Note that some children are refreshed elsewhere on timer ticks, so don't
    //  need attention here.
 
    //      Thumbnail chart
    if (pthumbwin && pthumbwin->IsShown()) {
      pthumbwin->Raise();
      pthumbwin->Refresh(false);
    }
 
    //      ChartInfo window
    if (m_pCIWin && m_pCIWin->IsShown()) {
      m_pCIWin->Raise();
      m_pCIWin->Refresh(false);
    }
 
    //        if(g_MainToolbar)
    //            g_MainToolbar->UpdateRecoveryWindow(g_bshowToolbar);
 
  } else
#endif
    wxWindow::Refresh(eraseBackground, rect);
}
 
void ChartCanvas::Update() {
  if (m_glcc && g_bopengl) {
#ifdef ocpnUSE_GL
    m_glcc->Update();
#endif
  } else
    wxWindow::Update();
}
 
void ChartCanvas::DrawEmboss(ocpnDC &dc, emboss_data *pemboss) {
  if (!pemboss) return;
  int x = pemboss->x, y = pemboss->y;
  const double factor = 200;
 
  wxASSERT_MSG(dc.GetDC(), "DrawEmboss has no dc (opengl?)");
  wxMemoryDC *pmdc = dynamic_cast<wxMemoryDC *>(dc.GetDC());
  wxASSERT_MSG(pmdc, "dc to EmbossCanvas not a memory dc");
 
  // Grab a snipped image out of the chart
  wxMemoryDC snip_dc;
  wxBitmap snip_bmp(pemboss->width, pemboss->height, -1);
  snip_dc.SelectObject(snip_bmp);
 
  snip_dc.Blit(0, 0, pemboss->width, pemboss->height, pmdc, x, y);
  snip_dc.SelectObject(wxNullBitmap);
 
  wxImage snip_img = snip_bmp.ConvertToImage();
 
  //  Apply Emboss map to the snip image
  unsigned char *pdata = snip_img.GetData();
  if (pdata) {
    for (int y = 0; y < pemboss->height; y++) {
      int map_index = (y * pemboss->width);
      for (int x = 0; x < pemboss->width; x++) {
        double val = (pemboss->pmap[map_index] * factor) / 256.;
 
        int nred = (int)((*pdata) + val);
        nred = nred > 255 ? 255 : (nred < 0 ? 0 : nred);
        *pdata++ = (unsigned char)nred;
 
        int ngreen = (int)((*pdata) + val);
        ngreen = ngreen > 255 ? 255 : (ngreen < 0 ? 0 : ngreen);
        *pdata++ = (unsigned char)ngreen;
 
        int nblue = (int)((*pdata) + val);
        nblue = nblue > 255 ? 255 : (nblue < 0 ? 0 : nblue);
        *pdata++ = (unsigned char)nblue;
 
        map_index++;
      }
    }
  }
 
  //  Convert embossed snip to a bitmap
  wxBitmap emb_bmp(snip_img);
 
  //  Map to another memoryDC
  wxMemoryDC result_dc;
  result_dc.SelectObject(emb_bmp);
 
  //  Blit to target
  pmdc->Blit(x, y, pemboss->width, pemboss->height, &result_dc, 0, 0);
 
  result_dc.SelectObject(wxNullBitmap);
}
 
emboss_data *ChartCanvas::EmbossOverzoomIndicator(ocpnDC &dc) {
  double zoom_factor = GetVP().ref_scale / GetVP().chart_scale;
 
  if (GetQuiltMode()) {
    // disable Overzoom indicator for MBTiles
    int refIndex = GetQuiltRefChartdbIndex();
    if (refIndex >= 0) {
      const ChartTableEntry &cte = ChartData->GetChartTableEntry(refIndex);
      ChartTypeEnum current_type = (ChartTypeEnum)cte.GetChartType();
      if (current_type == CHART_TYPE_MBTILES) {
        ChartBase *pChart = m_pQuilt->GetRefChart();
        ChartMbTiles *ptc = dynamic_cast<ChartMbTiles *>(pChart);
        if (ptc) {
          zoom_factor = ptc->GetZoomFactor();
        }
      }
    }
 
    if (zoom_factor <= 3.9) return NULL;
  } else {
    if (m_singleChart) {
      if (zoom_factor <= 3.9) return NULL;
    } else
      return NULL;
  }
 
  if (m_pEM_OverZoom) {
    m_pEM_OverZoom->x = 4;
    m_pEM_OverZoom->y = 0;
    if (g_MainToolbar && IsPrimaryCanvas()) {
      wxRect masterToolbarRect = g_MainToolbar->GetToolbarRect();
      m_pEM_OverZoom->x = masterToolbarRect.width + 4;
    }
  }
  return m_pEM_OverZoom;
}
 
void ChartCanvas::DrawOverlayObjects(ocpnDC &dc, const wxRegion &ru) {
  GridDraw(dc);
 
  //     bool pluginOverlayRender = true;
  //
  //     if(g_canvasConfig > 0){     // Multi canvas
  //         if(IsPrimaryCanvas())
  //             pluginOverlayRender = false;
  //     }
 
  g_overlayCanvas = this;
 
  if (g_pi_manager) {
    g_pi_manager->SendViewPortToRequestingPlugIns(GetVP());
    g_pi_manager->RenderAllCanvasOverlayPlugIns(dc, GetVP(), m_canvasIndex,
                                                OVERLAY_LEGACY);
  }
 
  AISDrawAreaNotices(dc, GetVP(), this);
 
  wxDC *pdc = dc.GetDC();
  if (pdc) {
    pdc->DestroyClippingRegion();
    wxDCClipper(*pdc, ru);
  }
 
  if (m_bShowNavobjects) {
    DrawAllTracksInBBox(dc, GetVP().GetBBox());
    DrawAllRoutesInBBox(dc, GetVP().GetBBox());
    DrawAllWaypointsInBBox(dc, GetVP().GetBBox());
    DrawAnchorWatchPoints(dc);
  } else {
    DrawActiveTrackInBBox(dc, GetVP().GetBBox());
    DrawActiveRouteInBBox(dc, GetVP().GetBBox());
  }
 
  AISDraw(dc, GetVP(), this);
  ShipDraw(dc);
  AlertDraw(dc);
 
  RenderVisibleSectorLights(dc);
 
  RenderAllChartOutlines(dc, GetVP());
  RenderRouteLegs(dc);
  RenderShipToActive(dc, false);
  ScaleBarDraw(dc);
  s57_DrawExtendedLightSectors(dc, VPoint, extendedSectorLegs);
  if (g_pi_manager) {
    g_pi_manager->RenderAllCanvasOverlayPlugIns(dc, GetVP(), m_canvasIndex,
                                                OVERLAY_OVER_SHIPS);
  }
 
  if (!g_bhide_depth_units) DrawEmboss(dc, EmbossDepthScale());
  if (!g_bhide_overzoom_flag) DrawEmboss(dc, EmbossOverzoomIndicator(dc));
 
  if (g_pi_manager) {
    g_pi_manager->RenderAllCanvasOverlayPlugIns(dc, GetVP(), m_canvasIndex,
                                                OVERLAY_OVER_EMBOSS);
  }
 
  if (m_bShowTide) {
    RebuildTideSelectList(GetVP().GetBBox());
    DrawAllTidesInBBox(dc, GetVP().GetBBox());
  }
 
  if (m_bShowCurrent) {
    RebuildCurrentSelectList(GetVP().GetBBox());
    DrawAllCurrentsInBBox(dc, GetVP().GetBBox());
  }
 
  if (!g_PrintingInProgress) {
    if (IsPrimaryCanvas()) {
      if (g_MainToolbar) g_MainToolbar->DrawDC(dc, 1.0);
    }
 
    if (IsPrimaryCanvas()) {
      if (g_iENCToolbar) g_iENCToolbar->DrawDC(dc, 1.0);
    }
 
    if (m_muiBar) m_muiBar->DrawDC(dc, 1.0);
 
    if (m_pTrackRolloverWin) {
      m_pTrackRolloverWin->Draw(dc);
      m_brepaint_piano = true;
    }
 
    if (m_pRouteRolloverWin) {
      m_pRouteRolloverWin->Draw(dc);
      m_brepaint_piano = true;
    }
 
    if (m_pAISRolloverWin) {
      m_pAISRolloverWin->Draw(dc);
      m_brepaint_piano = true;
    }
    if (m_brepaint_piano && g_bShowChartBar) {
      m_Piano->Paint(GetClientSize().y - m_Piano->GetHeight(), dc);
    }
 
    if (m_Compass) m_Compass->Paint(dc);
 
    if (!g_CanvasHideNotificationIcon) {
      if (IsPrimaryCanvas()) {
        auto &noteman = NotificationManager::GetInstance();
        if (noteman.GetNotificationCount()) {
          m_notification_button->SetIconSeverity(noteman.GetMaxSeverity());
          if (m_notification_button->UpdateStatus()) Refresh();
          m_notification_button->Show(true);
          m_notification_button->Paint(dc);
        } else {
          m_notification_button->Show(false);
        }
      }
    }
  }
  if (g_pi_manager) {
    g_pi_manager->RenderAllCanvasOverlayPlugIns(dc, GetVP(), m_canvasIndex,
                                                OVERLAY_OVER_UI);
  }
}
 
emboss_data *ChartCanvas::EmbossDepthScale() {
  if (!m_bShowDepthUnits) return NULL;
 
  int depth_unit_type = DEPTH_UNIT_UNKNOWN;
 
  if (GetQuiltMode()) {
    wxString s = m_pQuilt->GetQuiltDepthUnit();
    s.MakeUpper();
    if (s == "FEET")
      depth_unit_type = DEPTH_UNIT_FEET;
    else if (s.StartsWith("FATHOMS"))
      depth_unit_type = DEPTH_UNIT_FATHOMS;
    else if (s.StartsWith("METERS"))
      depth_unit_type = DEPTH_UNIT_METERS;
    else if (s.StartsWith("METRES"))
      depth_unit_type = DEPTH_UNIT_METERS;
    else if (s.StartsWith("METRIC"))
      depth_unit_type = DEPTH_UNIT_METERS;
    else if (s.StartsWith("METER"))
      depth_unit_type = DEPTH_UNIT_METERS;
 
  } else {
    if (m_singleChart) {
      depth_unit_type = m_singleChart->GetDepthUnitType();
      if (m_singleChart->GetChartFamily() == CHART_FAMILY_VECTOR)
        depth_unit_type = ps52plib->m_nDepthUnitDisplay + 1;
    }
  }
 
  emboss_data *ped = NULL;
  switch (depth_unit_type) {
    case DEPTH_UNIT_FEET:
      ped = m_pEM_Feet;
      break;
    case DEPTH_UNIT_METERS:
      ped = m_pEM_Meters;
      break;
    case DEPTH_UNIT_FATHOMS:
      ped = m_pEM_Fathoms;
      break;
    default:
      return NULL;
  }
 
  ped->x = (GetVP().pix_width - ped->width);
 
  if (m_Compass && m_bShowCompassWin && g_bShowCompassWin) {
    wxRect r = m_Compass->GetRect();
    ped->y = r.y + r.height;
  } else {
    ped->y = 40;
  }
  return ped;
}
 
void ChartCanvas::CreateDepthUnitEmbossMaps(ColorScheme cs) {
  ocpnStyle::Style *style = g_StyleManager->GetCurrentStyle();
  wxFont font;
  if (style->embossFont == wxEmptyString) {
    wxFont *dFont = FontMgr::Get().GetFont(_("Dialog"), 0);
    font = *dFont;
    font.SetPointSize(60);
    font.SetWeight(wxFONTWEIGHT_BOLD);
  } else
    font = wxFont(style->embossHeight, wxFONTFAMILY_SWISS, wxFONTSTYLE_NORMAL,
                  wxFONTWEIGHT_BOLD, false, style->embossFont);
 
  int emboss_width = 500;
  int emboss_height = 200;
 
  // Free any existing emboss maps
  delete m_pEM_Feet;
  delete m_pEM_Meters;
  delete m_pEM_Fathoms;
 
  // Create the 3 DepthUnit emboss map structures
  m_pEM_Feet =
      CreateEmbossMapData(font, emboss_width, emboss_height, _("Feet"), cs);
  m_pEM_Meters =
      CreateEmbossMapData(font, emboss_width, emboss_height, _("Meters"), cs);
  m_pEM_Fathoms =
      CreateEmbossMapData(font, emboss_width, emboss_height, _("Fathoms"), cs);
}
 
#define OVERZOOM_TEXT _("OverZoom")
 
void ChartCanvas::SetOverzoomFont() {
  ocpnStyle::Style *style = g_StyleManager->GetCurrentStyle();
  int w, h;
 
  wxFont font;
  if (style->embossFont == wxEmptyString) {
    wxFont *dFont = FontMgr::Get().GetFont(_("Dialog"), 0);
    font = *dFont;
    font.SetPointSize(40);
    font.SetWeight(wxFONTWEIGHT_BOLD);
  } else
    font = wxFont(style->embossHeight, wxFONTFAMILY_SWISS, wxFONTSTYLE_NORMAL,
                  wxFONTWEIGHT_BOLD, false, style->embossFont);
 
  wxClientDC dc(this);
  dc.SetFont(font);
  dc.GetTextExtent(OVERZOOM_TEXT, &w, &h);
 
  while (font.GetPointSize() > 10 && (w > 500 || h > 100)) {
    font.SetPointSize(font.GetPointSize() - 1);
    dc.SetFont(font);
    dc.GetTextExtent(OVERZOOM_TEXT, &w, &h);
  }
  m_overzoomFont = font;
  m_overzoomTextWidth = w;
  m_overzoomTextHeight = h;
}
 
void ChartCanvas::CreateOZEmbossMapData(ColorScheme cs) {
  delete m_pEM_OverZoom;
 
  if (m_overzoomTextWidth > 0 && m_overzoomTextHeight > 0)
    m_pEM_OverZoom =
        CreateEmbossMapData(m_overzoomFont, m_overzoomTextWidth + 10,
                            m_overzoomTextHeight + 10, OVERZOOM_TEXT, cs);
}
 
emboss_data *ChartCanvas::CreateEmbossMapData(wxFont &font, int width,
                                              int height, const wxString &str,
                                              ColorScheme cs) {
  int *pmap;
 
  //  Create a temporary bitmap
  wxBitmap bmp(width, height, -1);
 
  // Create a memory DC
  wxMemoryDC temp_dc;
  temp_dc.SelectObject(bmp);
 
  //  Paint on it
  temp_dc.SetBackground(*wxWHITE_BRUSH);
  temp_dc.SetTextBackground(*wxWHITE);
  temp_dc.SetTextForeground(*wxBLACK);
 
  temp_dc.Clear();
 
  temp_dc.SetFont(font);
 
  int str_w, str_h;
  temp_dc.GetTextExtent(str, &str_w, &str_h);
  //    temp_dc.DrawText( str, width - str_w - 10, 10 );
  temp_dc.DrawText(str, 1, 1);
 
  //  Deselect the bitmap
  temp_dc.SelectObject(wxNullBitmap);
 
  //  Convert bitmap the wxImage for manipulation
  wxImage img = bmp.ConvertToImage();
 
  int image_width = str_w * 105 / 100;
  int image_height = str_h * 105 / 100;
  wxRect r(0, 0, wxMin(image_width, img.GetWidth()),
           wxMin(image_height, img.GetHeight()));
  wxImage imgs = img.GetSubImage(r);
 
  double val_factor;
  switch (cs) {
    case GLOBAL_COLOR_SCHEME_DAY:
    default:
      val_factor = 1;
      break;
    case GLOBAL_COLOR_SCHEME_DUSK:
      val_factor = .5;
      break;
    case GLOBAL_COLOR_SCHEME_NIGHT:
      val_factor = .25;
      break;
  }
 
  int val;
  int index;
  const int w = imgs.GetWidth();
  const int h = imgs.GetHeight();
  pmap = (int *)calloc(w * h * sizeof(int), 1);
  //  Create emboss map by differentiating the emboss image
  //  and storing integer results in pmap
  //  n.b. since the image is B/W, it is sufficient to check
  //  one channel (i.e. red) only
  for (int y = 1; y < h - 1; y++) {
    for (int x = 1; x < w - 1; x++) {
      val =
          img.GetRed(x + 1, y + 1) - img.GetRed(x - 1, y - 1);  // range +/- 256
      val = (int)(val * val_factor);
      index = (y * w) + x;
      pmap[index] = val;
    }
  }
 
  emboss_data *pret = new emboss_data;
  pret->pmap = pmap;
  pret->width = w;
  pret->height = h;
 
  return pret;
}
 
void ChartCanvas::DrawAllTracksInBBox(ocpnDC &dc, LLBBox &BltBBox) {
  Track *active_track = NULL;
  for (Track *pTrackDraw : g_TrackList) {
    if (g_pActiveTrack == pTrackDraw) {
      active_track = pTrackDraw;
      continue;
    }
 
    TrackGui(*pTrackDraw).Draw(this, dc, GetVP(), BltBBox);
  }
 
  if (active_track) TrackGui(*active_track).Draw(this, dc, GetVP(), BltBBox);
}
 
void ChartCanvas::DrawActiveTrackInBBox(ocpnDC &dc, LLBBox &BltBBox) {
  Track *active_track = NULL;
  for (Track *pTrackDraw : g_TrackList) {
    if (g_pActiveTrack == pTrackDraw) {
      active_track = pTrackDraw;
      break;
    }
  }
  if (active_track) TrackGui(*active_track).Draw(this, dc, GetVP(), BltBBox);
}
 
void ChartCanvas::DrawAllRoutesInBBox(ocpnDC &dc, LLBBox &BltBBox) {
  Route *active_route = NULL;
  for (Route *pRouteDraw : *pRouteList) {
    if (pRouteDraw->IsActive() || pRouteDraw->IsSelected()) {
      active_route = pRouteDraw;
      continue;
    }
 
    //        if(m_canvasIndex == 1)
    RouteGui(*pRouteDraw).Draw(dc, this, BltBBox);
  }
 
  //  Draw any active or selected route (or track) last, so that is is always on
  //  top
  if (active_route) RouteGui(*active_route).Draw(dc, this, BltBBox);
}
 
void ChartCanvas::DrawActiveRouteInBBox(ocpnDC &dc, LLBBox &BltBBox) {
  Route *active_route = NULL;
 
  for (Route *pRouteDraw : *pRouteList) {
    if (pRouteDraw->IsActive() || pRouteDraw->IsSelected()) {
      active_route = pRouteDraw;
      break;
    }
  }
  if (active_route) RouteGui(*active_route).Draw(dc, this, BltBBox);
}
 
void ChartCanvas::DrawAllWaypointsInBBox(ocpnDC &dc, LLBBox &BltBBox) {
  if (!pWayPointMan) return;
 
  auto node = pWayPointMan->GetWaypointList()->begin();
 
  while (node != pWayPointMan->GetWaypointList()->end()) {
    RoutePoint *pWP = *node;
    if (pWP) {
      if (pWP->m_bIsInRoute) {
        ++node;
        continue;
      }
 
      /* technically incorrect... waypoint has bounding box */
      if (BltBBox.Contains(pWP->m_lat, pWP->m_lon))
        RoutePointGui(*pWP).Draw(dc, this, NULL);
      else {
        // Are Range Rings enabled?
        if (pWP->GetShowWaypointRangeRings() &&
            (pWP->GetWaypointRangeRingsNumber() > 0)) {
          double factor = 1.00;
          if (pWP->GetWaypointRangeRingsStepUnits() ==
              1)  // convert kilometers to NMi
            factor = 1 / 1.852;
 
          double radius = factor * pWP->GetWaypointRangeRingsNumber() *
                          pWP->GetWaypointRangeRingsStep() / 60.;
          radius *= 2;  // Fudge factor
 
          LLBBox radar_box;
          radar_box.Set(pWP->m_lat - radius, pWP->m_lon - radius,
                        pWP->m_lat + radius, pWP->m_lon + radius);
          if (!BltBBox.IntersectOut(radar_box)) {
            RoutePointGui(*pWP).Draw(dc, this, NULL);
          }
        }
      }
    }
 
    ++node;
  }
}
 
void ChartCanvas::DrawBlinkObjects() {
  //  All RoutePoints
  wxRect update_rect;
 
  if (!pWayPointMan) return;
 
  for (RoutePoint *pWP : *pWayPointMan->GetWaypointList()) {
    if (pWP) {
      if (pWP->m_bBlink) {
        update_rect.Union(pWP->CurrentRect_in_DC);
      }
    }
  }
  if (!update_rect.IsEmpty()) RefreshRect(update_rect);
}
 
void ChartCanvas::DrawAnchorWatchPoints(ocpnDC &dc) {
  // draw anchor watch rings, if activated
 
  if (pAnchorWatchPoint1 || pAnchorWatchPoint2) {
    wxPoint r1, r2;
    wxPoint lAnchorPoint1, lAnchorPoint2;
    double lpp1 = 0.0;
    double lpp2 = 0.0;
    if (pAnchorWatchPoint1) {
      lpp1 = GetAnchorWatchRadiusPixels(pAnchorWatchPoint1);
      GetCanvasPointPix(pAnchorWatchPoint1->m_lat, pAnchorWatchPoint1->m_lon,
                        &lAnchorPoint1);
    }
    if (pAnchorWatchPoint2) {
      lpp2 = GetAnchorWatchRadiusPixels(pAnchorWatchPoint2);
      GetCanvasPointPix(pAnchorWatchPoint2->m_lat, pAnchorWatchPoint2->m_lon,
                        &lAnchorPoint2);
    }
 
    wxPen ppPeng(GetGlobalColor("UGREN"), 2);
    wxPen ppPenr(GetGlobalColor("URED"), 2);
 
    wxBrush *ppBrush = wxTheBrushList->FindOrCreateBrush(
        wxColour(0, 0, 0), wxBRUSHSTYLE_TRANSPARENT);
    dc.SetBrush(*ppBrush);
 
    if (lpp1 > 0) {
      dc.SetPen(ppPeng);
      dc.StrokeCircle(lAnchorPoint1.x, lAnchorPoint1.y, fabs(lpp1));
    }
 
    if (lpp2 > 0) {
      dc.SetPen(ppPeng);
      dc.StrokeCircle(lAnchorPoint2.x, lAnchorPoint2.y, fabs(lpp2));
    }
 
    if (lpp1 < 0) {
      dc.SetPen(ppPenr);
      dc.StrokeCircle(lAnchorPoint1.x, lAnchorPoint1.y, fabs(lpp1));
    }
 
    if (lpp2 < 0) {
      dc.SetPen(ppPenr);
      dc.StrokeCircle(lAnchorPoint2.x, lAnchorPoint2.y, fabs(lpp2));
    }
  }
}
 
double ChartCanvas::GetAnchorWatchRadiusPixels(RoutePoint *pAnchorWatchPoint) {
  double lpp = 0.;
  wxPoint r1;
  wxPoint lAnchorPoint;
  double d1 = 0.0;
  double dabs;
  double tlat1, tlon1;
 
  if (pAnchorWatchPoint) {
    (pAnchorWatchPoint->GetName()).ToDouble(&d1);
    d1 = AnchorDistFix(d1, AnchorPointMinDist, g_nAWMax);
    dabs = fabs(d1 / 1852.);
    ll_gc_ll(pAnchorWatchPoint->m_lat, pAnchorWatchPoint->m_lon, 0, dabs,
             &tlat1, &tlon1);
    GetCanvasPointPix(tlat1, tlon1, &r1);
    GetCanvasPointPix(pAnchorWatchPoint->m_lat, pAnchorWatchPoint->m_lon,
                      &lAnchorPoint);
    lpp = sqrt(pow((double)(lAnchorPoint.x - r1.x), 2) +
               pow((double)(lAnchorPoint.y - r1.y), 2));
 
    //    This is an entry watch
    if (d1 < 0) lpp = -lpp;
  }
  return lpp;
}
 
//------------------------------------------------------------------------------------------
//    Tides Support
//------------------------------------------------------------------------------------------
void ChartCanvas::RebuildTideSelectList(LLBBox &BBox) {
  if (!ptcmgr) return;
 
  pSelectTC->DeleteAllSelectableTypePoints(SELTYPE_TIDEPOINT);
 
  for (int i = 1; i < ptcmgr->Get_max_IDX() + 1; i++) {
    const IDX_entry *pIDX = ptcmgr->GetIDX_entry(i);
    double lon = pIDX->IDX_lon;
    double lat = pIDX->IDX_lat;
 
    char type = pIDX->IDX_type;  // Entry "TCtcIUu" identifier
    if ((type == 't') || (type == 'T')) {
      if (BBox.Contains(lat, lon)) {
        //    Manage the point selection list
        pSelectTC->AddSelectablePoint(lat, lon, pIDX, SELTYPE_TIDEPOINT);
      }
    }
  }
}
 
void ChartCanvas::DrawAllTidesInBBox(ocpnDC &dc, LLBBox &BBox) {
  if (!ptcmgr) return;
 
  wxDateTime this_now = gTimeSource;
  bool cur_time = !gTimeSource.IsValid();
  if (cur_time) this_now = wxDateTime::Now();
  time_t t_this_now = this_now.GetTicks();
 
  wxPen *pblack_pen = wxThePenList->FindOrCreatePen(GetGlobalColor("UINFD"), 1,
                                                    wxPENSTYLE_SOLID);
  wxPen *pyelo_pen = wxThePenList->FindOrCreatePen(
      GetGlobalColor(cur_time ? "YELO1" : "YELO2"), 1, wxPENSTYLE_SOLID);
  wxPen *pblue_pen = wxThePenList->FindOrCreatePen(
      GetGlobalColor(cur_time ? "BLUE2" : "BLUE3"), 1, wxPENSTYLE_SOLID);
 
  wxBrush *pgreen_brush = wxTheBrushList->FindOrCreateBrush(
      GetGlobalColor("GREEN1"), wxBRUSHSTYLE_SOLID);
  wxBrush *pblue_brush = wxTheBrushList->FindOrCreateBrush(
      GetGlobalColor(cur_time ? "BLUE2" : "BLUE3"), wxBRUSHSTYLE_SOLID);
  wxBrush *pyelo_brush = wxTheBrushList->FindOrCreateBrush(
      GetGlobalColor(cur_time ? "YELO1" : "YELO2"), wxBRUSHSTYLE_SOLID);
 
  wxFont *dFont = FontMgr::Get().GetFont(_("ExtendedTideIcon"));
  dc.SetTextForeground(FontMgr::Get().GetFontColor(_("ExtendedTideIcon")));
  int font_size = wxMax(10, dFont->GetPointSize());
  font_size /= g_Platform->GetDisplayDIPMult(this);
  wxFont *plabelFont = FontMgr::Get().FindOrCreateFont(
      font_size, dFont->GetFamily(), dFont->GetStyle(), dFont->GetWeight(),
      false, dFont->GetFaceName());
 
  dc.SetPen(*pblack_pen);
  dc.SetBrush(*pgreen_brush);
 
  wxBitmap bm;
  switch (m_cs) {
    case GLOBAL_COLOR_SCHEME_DAY:
      bm = m_bmTideDay;
      break;
    case GLOBAL_COLOR_SCHEME_DUSK:
      bm = m_bmTideDusk;
      break;
    case GLOBAL_COLOR_SCHEME_NIGHT:
      bm = m_bmTideNight;
      break;
    default:
      bm = m_bmTideDay;
      break;
  }
 
  int bmw = bm.GetWidth();
  int bmh = bm.GetHeight();
 
  float scale_factor = 1.0;
 
  //  Set the onscreen size of the symbol
  //  Compensate for various display resolutions
  float icon_pixelRefDim = 45;
 
  // Tidal report graphic is scaled by the text size of the label in use
  wxScreenDC sdc;
  int height;
  sdc.GetTextExtent("M", NULL, &height, NULL, NULL, plabelFont);
  height *= g_Platform->GetDisplayDIPMult(this);
  float pix_factor = (1.5 * height) / icon_pixelRefDim;
 
  scale_factor *= pix_factor;
 
  float user_scale_factor = g_ChartScaleFactorExp;
  if (g_ChartScaleFactorExp > 1.0)
    user_scale_factor = (log(g_ChartScaleFactorExp) + 1.0) *
                        1.2;  // soften the scale factor a bit
 
  scale_factor *= user_scale_factor;
  scale_factor *= GetContentScaleFactor();
 
  {
    double marge = 0.05;
    std::vector<LLBBox> drawn_boxes;
    for (int i = 1; i < ptcmgr->Get_max_IDX() + 1; i++) {
      const IDX_entry *pIDX = ptcmgr->GetIDX_entry(i);
 
      char type = pIDX->IDX_type;          // Entry "TCtcIUu" identifier
      if ((type == 't') || (type == 'T'))  // only Tides
      {
        double lon = pIDX->IDX_lon;
        double lat = pIDX->IDX_lat;
 
        if (BBox.ContainsMarge(lat, lon, marge)) {
          // Avoid drawing detailed graphic for duplicate tide stations
          if (GetVP().chart_scale < 500000) {
            bool bdrawn = false;
            for (size_t i = 0; i < drawn_boxes.size(); i++) {
              if (drawn_boxes[i].Contains(lat, lon)) {
                bdrawn = true;
                break;
              }
            }
            if (bdrawn) continue;  // the station loop
 
            LLBBox this_box;
            this_box.Set(lat, lon, lat, lon);
            this_box.EnLarge(.005);
            drawn_boxes.push_back(this_box);
          }
 
          wxPoint r;
          GetCanvasPointPix(lat, lon, &r);
          // draw standard icons
          if (GetVP().chart_scale > 500000) {
            dc.DrawBitmap(bm, r.x - bmw / 2, r.y - bmh / 2, true);
          }
          // draw "extended" icons
          else {
            dc.SetFont(*plabelFont);
            {
              {
                float val, nowlev;
                float ltleve = 0.;
                float htleve = 0.;
                time_t tctime;
                time_t lttime = 0;
                time_t httime = 0;
                bool wt;
                // define if flood or ebb in the last ten minutes and verify if
                // data are useable
                if (ptcmgr->GetTideFlowSens(
                        t_this_now, BACKWARD_TEN_MINUTES_STEP,
                        pIDX->IDX_rec_num, nowlev, val, wt)) {
                  // search forward the first HW or LW near "now" ( starting at
                  // "now" - ten minutes )
                  ptcmgr->GetHightOrLowTide(
                      t_this_now + BACKWARD_TEN_MINUTES_STEP,
                      FORWARD_TEN_MINUTES_STEP, FORWARD_ONE_MINUTES_STEP, val,
                      wt, pIDX->IDX_rec_num, val, tctime);
                  if (wt) {
                    httime = tctime;
                    htleve = val;
                  } else {
                    lttime = tctime;
                    ltleve = val;
                  }
                  wt = !wt;
 
                  // then search opposite tide near "now"
                  if (tctime > t_this_now)  // search backward
                    ptcmgr->GetHightOrLowTide(
                        t_this_now, BACKWARD_TEN_MINUTES_STEP,
                        BACKWARD_ONE_MINUTES_STEP, nowlev, wt,
                        pIDX->IDX_rec_num, val, tctime);
                  else
                    // or search forward
                    ptcmgr->GetHightOrLowTide(
                        t_this_now, FORWARD_TEN_MINUTES_STEP,
                        FORWARD_ONE_MINUTES_STEP, nowlev, wt, pIDX->IDX_rec_num,
                        val, tctime);
                  if (wt) {
                    httime = tctime;
                    htleve = val;
                  } else {
                    lttime = tctime;
                    ltleve = val;
                  }
 
                  // draw the tide rectangle:
 
                  // tide icon rectangle has default pre-scaled width = 12 ,
                  // height = 45
                  int width = (int)(12 * scale_factor + 0.5);
                  int height = (int)(45 * scale_factor + 0.5);
                  int linew = wxMax(1, (int)(scale_factor));
                  int xDraw = r.x - (width / 2);
                  int yDraw = r.y - (height / 2);
 
                  // process tide state  ( %height and flow sens )
                  float ts = 1 - ((nowlev - ltleve) / (htleve - ltleve));
                  int hs = (httime > lttime) ? -4 : 4;
                  hs *= (int)(scale_factor + 0.5);
                  if (ts > 0.995 || ts < 0.005) hs = 0;
                  int ht_y = (int)(height * ts);
 
                  // draw yellow tide rectangle outlined in black
                  pblack_pen->SetWidth(linew);
                  dc.SetPen(*pblack_pen);
                  dc.SetBrush(*pyelo_brush);
                  dc.DrawRectangle(xDraw, yDraw, width, height);
 
                  // draw blue rectangle as water height, smaller in width than
                  // yellow rectangle
                  dc.SetPen(*pblue_pen);
                  dc.SetBrush(*pblue_brush);
                  dc.DrawRectangle((xDraw + 2 * linew), yDraw + ht_y,
                                   (width - (4 * linew)), height - ht_y);
 
                  // draw sens arrows (ensure they are not "under-drawn" by top
                  // line of blue rectangle )
                  int hl;
                  wxPoint arrow[3];
                  arrow[0].x = xDraw + 2 * linew;
                  arrow[1].x = xDraw + width / 2;
                  arrow[2].x = xDraw + width - 2 * linew;
                  pyelo_pen->SetWidth(linew);
                  pblue_pen->SetWidth(linew);
                  if (ts > 0.35 || ts < 0.15)  // one arrow at 3/4 hight tide
                  {
                    hl = (int)(height * 0.25) + yDraw;
                    arrow[0].y = hl;
                    arrow[1].y = hl + hs;
                    arrow[2].y = hl;
                    if (ts < 0.15)
                      dc.SetPen(*pyelo_pen);
                    else
                      dc.SetPen(*pblue_pen);
                    dc.DrawLines(3, arrow);
                  }
                  if (ts > 0.60 || ts < 0.40)  // one arrow at 1/2 hight tide
                  {
                    hl = (int)(height * 0.5) + yDraw;
                    arrow[0].y = hl;
                    arrow[1].y = hl + hs;
                    arrow[2].y = hl;
                    if (ts < 0.40)
                      dc.SetPen(*pyelo_pen);
                    else
                      dc.SetPen(*pblue_pen);
                    dc.DrawLines(3, arrow);
                  }
                  if (ts < 0.65 || ts > 0.85)  // one arrow at 1/4 Hight tide
                  {
                    hl = (int)(height * 0.75) + yDraw;
                    arrow[0].y = hl;
                    arrow[1].y = hl + hs;
                    arrow[2].y = hl;
                    if (ts < 0.65)
                      dc.SetPen(*pyelo_pen);
                    else
                      dc.SetPen(*pblue_pen);
                    dc.DrawLines(3, arrow);
                  }
                  // draw tide level text
                  wxString s;
                  s.Printf("%3.1f", nowlev);
                  Station_Data *pmsd = pIDX->pref_sta_data;  // write unit
                  if (pmsd) s.Append(wxString(pmsd->units_abbrv, wxConvUTF8));
                  int wx1;
                  dc.GetTextExtent(s, &wx1, NULL);
                  wx1 *= g_Platform->GetDisplayDIPMult(this);
                  dc.DrawText(s, r.x - (wx1 / 2), yDraw + height);
                }
              }
            }
          }
        }
      }
    }
  }
}
 
//------------------------------------------------------------------------------------------
//    Currents Support
//------------------------------------------------------------------------------------------
 
void ChartCanvas::RebuildCurrentSelectList(LLBBox &BBox) {
  if (!ptcmgr) return;
 
  pSelectTC->DeleteAllSelectableTypePoints(SELTYPE_CURRENTPOINT);
 
  for (int i = 1; i < ptcmgr->Get_max_IDX() + 1; i++) {
    const IDX_entry *pIDX = ptcmgr->GetIDX_entry(i);
    double lon = pIDX->IDX_lon;
    double lat = pIDX->IDX_lat;
 
    char type = pIDX->IDX_type;  // Entry "TCtcIUu" identifier
    if (((type == 'c') || (type == 'C')) && (!pIDX->b_skipTooDeep)) {
      if ((BBox.Contains(lat, lon))) {
        //    Manage the point selection list
        pSelectTC->AddSelectablePoint(lat, lon, pIDX, SELTYPE_CURRENTPOINT);
      }
    }
  }
}
 
void ChartCanvas::DrawAllCurrentsInBBox(ocpnDC &dc, LLBBox &BBox) {
  if (!ptcmgr) return;
 
  float tcvalue, dir;
  bool bnew_val;
  char sbuf[20];
  wxFont *pTCFont;
  double lon_last = 0.;
  double lat_last = 0.;
  // arrow size for Raz Blanchard : 12 knots north
  double marge = 0.2;
  bool cur_time = !gTimeSource.IsValid();
 
  double true_scale_display = floor(VPoint.chart_scale / 100.) * 100.;
  bDrawCurrentValues = true_scale_display < g_Show_Target_Name_Scale;
 
  wxPen *pblack_pen = wxThePenList->FindOrCreatePen(GetGlobalColor("UINFD"), 1,
                                                    wxPENSTYLE_SOLID);
  wxPen *porange_pen = wxThePenList->FindOrCreatePen(
      GetGlobalColor(cur_time ? "UINFO" : "UINFB"), 1, wxPENSTYLE_SOLID);
  wxBrush *porange_brush = wxTheBrushList->FindOrCreateBrush(
      GetGlobalColor(cur_time ? "UINFO" : "UINFB"), wxBRUSHSTYLE_SOLID);
  wxBrush *pgray_brush = wxTheBrushList->FindOrCreateBrush(
      GetGlobalColor("UIBDR"), wxBRUSHSTYLE_SOLID);
  wxBrush *pblack_brush = wxTheBrushList->FindOrCreateBrush(
      GetGlobalColor("UINFD"), wxBRUSHSTYLE_SOLID);
 
  double skew_angle = GetVPRotation();
 
  wxFont *dFont = FontMgr::Get().GetFont(_("CurrentValue"));
  dc.SetTextForeground(FontMgr::Get().GetFontColor(_("CurrentValue")));
  int font_size = wxMax(10, dFont->GetPointSize());
  font_size /= g_Platform->GetDisplayDIPMult(this);
  pTCFont = FontMgr::Get().FindOrCreateFont(
      font_size, dFont->GetFamily(), dFont->GetStyle(), dFont->GetWeight(),
      false, dFont->GetFaceName());
 
  float scale_factor = 1.0;
 
  //  Set the onscreen size of the symbol
  // Current report graphic is scaled by the text size of the label in use
  wxScreenDC sdc;
  int height;
  sdc.GetTextExtent("M", NULL, &height, NULL, NULL, pTCFont);
  height *= g_Platform->GetDisplayDIPMult(this);
  float nominal_icon_size_pixels = 15;
  float pix_factor = (1 * height) / nominal_icon_size_pixels;
 
  scale_factor *= pix_factor;
 
  float user_scale_factor = g_ChartScaleFactorExp;
  if (g_ChartScaleFactorExp > 1.0)
    user_scale_factor = (log(g_ChartScaleFactorExp) + 1.0) *
                        1.2;  // soften the scale factor a bit
 
  scale_factor *= user_scale_factor;
 
  scale_factor *= GetContentScaleFactor();
 
  {
    for (int i = 1; i < ptcmgr->Get_max_IDX() + 1; i++) {
      const IDX_entry *pIDX = ptcmgr->GetIDX_entry(i);
      double lon = pIDX->IDX_lon;
      double lat = pIDX->IDX_lat;
 
      char type = pIDX->IDX_type;  // Entry "TCtcIUu" identifier
      if (((type == 'c') || (type == 'C')) && (1 /*pIDX->IDX_Useable*/)) {
        if (!pIDX->b_skipTooDeep && (BBox.ContainsMarge(lat, lon, marge))) {
          wxPoint r;
          GetCanvasPointPix(lat, lon, &r);
 
          wxPoint d[4];  // points of a diamond at the current station location
          int dd = (int)(5.0 * scale_factor + 0.5);
          d[0].x = r.x;
          d[0].y = r.y + dd;
          d[1].x = r.x + dd;
          d[1].y = r.y;
          d[2].x = r.x;
          d[2].y = r.y - dd;
          d[3].x = r.x - dd;
          d[3].y = r.y;
 
          if (1) {
            pblack_pen->SetWidth(wxMax(2, (int)(scale_factor + 0.5)));
            dc.SetPen(*pblack_pen);
            dc.SetBrush(*porange_brush);
            dc.DrawPolygon(4, d);
 
            if (type == 'C') {
              dc.SetBrush(*pblack_brush);
              dc.DrawCircle(r.x, r.y, (int)(2 * scale_factor));
            }
 
            if (GetVP().chart_scale < 1000000) {
              if (!ptcmgr->GetTideOrCurrent15(0, i, tcvalue, dir, bnew_val))
                continue;
            } else
              continue;
 
            if (1 /*type == 'c'*/) {
              {
                //    Get the display pixel location of the current station
                int pixxc, pixyc;
                pixxc = r.x;
                pixyc = r.y;
 
                //    Adjust drawing size using logarithmic scale. tcvalue is
                //    current in knots
                double a1 = fabs(tcvalue) * 10.;
                // Current values <= 0.1 knot will have no arrow
                a1 = wxMax(1.0, a1);
                double a2 = log10(a1);
 
                float cscale = scale_factor * a2 * 0.3;
 
                porange_pen->SetWidth(wxMax(2, (int)(scale_factor + 0.5)));
                dc.SetPen(*porange_pen);
                DrawArrow(dc, pixxc, pixyc, dir - 90 + (skew_angle * 180. / PI),
                          cscale);
                // Draw text, if enabled
 
                if (bDrawCurrentValues) {
                  dc.SetFont(*pTCFont);
                  snprintf(sbuf, 19, "%3.1f", fabs(tcvalue));
                  dc.DrawText(wxString(sbuf, wxConvUTF8), pixxc, pixyc);
                }
              }
            }  // scale
          }
          /*          This is useful for debugging the TC database
           else
           {
           dc.SetPen ( *porange_pen );
           dc.SetBrush ( *pgray_brush );
           dc.DrawPolygon ( 4, d );
           }
           */
        }
        lon_last = lon;
        lat_last = lat;
      }
    }
  }
}
 
void ChartCanvas::DrawTCWindow(int x, int y, void *pvIDX) {
  ShowSingleTideDialog(x, y, pvIDX);
}
 
void ChartCanvas::ShowSingleTideDialog(int x, int y, void *pvIDX) {
  if (!pvIDX) return;  // Validate input
 
  IDX_entry *pNewIDX = (IDX_entry *)pvIDX;
 
  // Check if a tide dialog is already open and visible
  if (pCwin && pCwin->IsShown()) {
    // Same tide station: bring existing dialog to front (preserves user
    // context)
    if (pCwin->GetCurrentIDX() == pNewIDX) {
      pCwin->Raise();
      pCwin->SetFocus();
 
      // Provide subtle visual feedback that dialog is already open
      pCwin->RequestUserAttention(wxUSER_ATTENTION_INFO);
      return;
    }
 
    // Different tide station: close current dialog before opening new one
    pCwin->Close();  // This sets pCwin = NULL in OnCloseWindow
  }
 
  if (pCwin) {
    // This shouldn't happen but ensures clean state
    pCwin->Destroy();
    pCwin = NULL;
  }
 
  // Create and display new tide dialog
  pCwin = new TCWin(this, x, y, pvIDX);
 
  // Ensure the dialog is properly shown and focused
  if (pCwin) {
    pCwin->Show();
    pCwin->Raise();
    pCwin->SetFocus();
  }
}
 
bool ChartCanvas::IsTideDialogOpen() const { return pCwin && pCwin->IsShown(); }
 
void ChartCanvas::CloseTideDialog() {
  if (pCwin) {
    pCwin->Close();  // This will set pCwin = NULL via OnCloseWindow
  }
}
 
#define NUM_CURRENT_ARROW_POINTS 9
static wxPoint CurrentArrowArray[NUM_CURRENT_ARROW_POINTS] = {
    wxPoint(0, 0),    wxPoint(0, -10), wxPoint(55, -10),
    wxPoint(55, -25), wxPoint(100, 0), wxPoint(55, 25),
    wxPoint(55, 10),  wxPoint(0, 10),  wxPoint(0, 0)};
 
void ChartCanvas::DrawArrow(ocpnDC &dc, int x, int y, double rot_angle,
                            double scale) {
  if (scale > 1e-2) {
    float sin_rot = sin(rot_angle * PI / 180.);
    float cos_rot = cos(rot_angle * PI / 180.);
 
    // Move to the first point
 
    float xt = CurrentArrowArray[0].x;
    float yt = CurrentArrowArray[0].y;
 
    float xp = (xt * cos_rot) - (yt * sin_rot);
    float yp = (xt * sin_rot) + (yt * cos_rot);
    int x1 = (int)(xp * scale);
    int y1 = (int)(yp * scale);
 
    // Walk thru the point list
    for (int ip = 1; ip < NUM_CURRENT_ARROW_POINTS; ip++) {
      xt = CurrentArrowArray[ip].x;
      yt = CurrentArrowArray[ip].y;
 
      float xp = (xt * cos_rot) - (yt * sin_rot);
      float yp = (xt * sin_rot) + (yt * cos_rot);
      int x2 = (int)(xp * scale);
      int y2 = (int)(yp * scale);
 
      dc.DrawLine(x1 + x, y1 + y, x2 + x, y2 + y);
 
      x1 = x2;
      y1 = y2;
    }
  }
}
 
wxString ChartCanvas::FindValidUploadPort() {
  wxString port;
  //  Try to use the saved persistent upload port first
  if (!g_uploadConnection.IsEmpty() &&
      g_uploadConnection.StartsWith("Serial")) {
    port = g_uploadConnection;
  }
 
  else {
    // If there is no persistent upload port recorded (yet)
    // then use the first available serial connection which has output defined.
    for (auto *cp : TheConnectionParams()) {
      if ((cp->IOSelect != DS_TYPE_INPUT) && cp->Type == SERIAL)
        port << "Serial:" << cp->Port;
    }
  }
  return port;
}
 
void ShowAISTargetQueryDialog(wxWindow *win, int mmsi) {
  if (!win) return;
 
  if (NULL == g_pais_query_dialog_active) {
    int pos_x = g_ais_query_dialog_x;
    int pos_y = g_ais_query_dialog_y;
 
    if (g_pais_query_dialog_active) {
      g_pais_query_dialog_active->Destroy();
      g_pais_query_dialog_active = new AISTargetQueryDialog();
    } else {
      g_pais_query_dialog_active = new AISTargetQueryDialog();
    }
 
    g_pais_query_dialog_active->Create(win, -1, _("AIS Target Query"),
                                       wxPoint(pos_x, pos_y));
 
    g_pais_query_dialog_active->SetAutoCentre(g_btouch);
    g_pais_query_dialog_active->SetAutoSize(g_bresponsive);
    g_pais_query_dialog_active->SetMMSI(mmsi);
    g_pais_query_dialog_active->UpdateText();
    wxSize sz = g_pais_query_dialog_active->GetSize();
 
    bool b_reset_pos = false;
#ifdef __WXMSW__
    //  Support MultiMonitor setups which an allow negative window positions.
    //  If the requested window title bar does not intersect any installed
    //  monitor, then default to simple primary monitor positioning.
    RECT frame_title_rect;
    frame_title_rect.left = pos_x;
    frame_title_rect.top = pos_y;
    frame_title_rect.right = pos_x + sz.x;
    frame_title_rect.bottom = pos_y + 30;
 
    if (NULL == MonitorFromRect(&frame_title_rect, MONITOR_DEFAULTTONULL))
      b_reset_pos = true;
#else
 
    //    Make sure drag bar (title bar) of window intersects wxClient Area of
    //    screen, with a little slop...
    wxRect window_title_rect;  // conservative estimate
    window_title_rect.x = pos_x;
    window_title_rect.y = pos_y;
    window_title_rect.width = sz.x;
    window_title_rect.height = 30;
 
    wxRect ClientRect = wxGetClientDisplayRect();
    ClientRect.Deflate(
        60, 60);  // Prevent the new window from being too close to the edge
    if (!ClientRect.Intersects(window_title_rect)) b_reset_pos = true;
 
#endif
 
    if (b_reset_pos) g_pais_query_dialog_active->Move(50, 200);
 
  } else {
    g_pais_query_dialog_active->SetMMSI(mmsi);
    g_pais_query_dialog_active->UpdateText();
  }
 
  g_pais_query_dialog_active->Show();
}
 
void ChartCanvas::ToggleCanvasQuiltMode() {
  bool cur_mode = GetQuiltMode();
 
  if (!GetQuiltMode())
    SetQuiltMode(true);
  else if (GetQuiltMode()) {
    SetQuiltMode(false);
    g_sticky_chart = GetQuiltReferenceChartIndex();
  }
 
  if (cur_mode != GetQuiltMode()) {
    SetupCanvasQuiltMode();
    DoCanvasUpdate();
    InvalidateGL();
    Refresh();
  }
  //  TODO What to do about this?
  // g_bQuiltEnable = GetQuiltMode();
 
  // Recycle the S52 PLIB so that vector charts will flush caches and re-render
  if (ps52plib) ps52plib->GenerateStateHash();
 
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
}
 
void ChartCanvas::DoCanvasStackDelta(int direction) {
  if (!GetQuiltMode()) {
    int current_stack_index = GetpCurrentStack()->CurrentStackEntry;
    if ((current_stack_index + direction) >= GetpCurrentStack()->nEntry) return;
    if ((current_stack_index + direction) < 0) return;
 
    if (m_bpersistent_quilt /*&& g_bQuiltEnable*/) {
      int new_dbIndex =
          GetpCurrentStack()->GetDBIndex(current_stack_index + direction);
 
      if (IsChartQuiltableRef(new_dbIndex)) {
        ToggleCanvasQuiltMode();
        SelectQuiltRefdbChart(new_dbIndex);
        m_bpersistent_quilt = false;
      }
    } else {
      SelectChartFromStack(current_stack_index + direction);
    }
  } else {
    std::vector<int> piano_chart_index_array =
        GetQuiltExtendedStackdbIndexArray();
    int refdb = GetQuiltRefChartdbIndex();
 
    //      Find the ref chart in the stack
    int current_index = -1;
    for (unsigned int i = 0; i < piano_chart_index_array.size(); i++) {
      if (refdb == piano_chart_index_array[i]) {
        current_index = i;
        break;
      }
    }
    if (current_index == -1) return;
 
    const ChartTableEntry &ctet = ChartData->GetChartTableEntry(refdb);
    int target_family = ctet.GetChartFamily();
 
    int new_index = -1;
    int check_index = current_index + direction;
    bool found = false;
    int check_dbIndex = -1;
    int new_dbIndex = -1;
 
    //      When quilted. switch within the same chart family
    while (!found &&
           (unsigned int)check_index < piano_chart_index_array.size() &&
           (check_index >= 0)) {
      check_dbIndex = piano_chart_index_array[check_index];
      const ChartTableEntry &cte = ChartData->GetChartTableEntry(check_dbIndex);
      if (target_family == cte.GetChartFamily()) {
        found = true;
        new_index = check_index;
        new_dbIndex = check_dbIndex;
        break;
      }
 
      check_index += direction;
    }
 
    if (!found) return;
 
    if (!IsChartQuiltableRef(new_dbIndex)) {
      ToggleCanvasQuiltMode();
      SelectdbChart(new_dbIndex);
      m_bpersistent_quilt = true;
    } else {
      SelectQuiltRefChart(new_index);
    }
  }
 
  gFrame->UpdateGlobalMenuItems();  // update the state of the menu items
                                    // (checkmarks etc)
  SetQuiltChartHiLiteIndex(-1);
 
  ReloadVP();
}
 
//--------------------------------------------------------------------------------------------------------
//
//      Toolbar support
//
//--------------------------------------------------------------------------------------------------------
 
void ChartCanvas::OnToolLeftClick(wxCommandEvent &event) {
  //  Handle the per-canvas toolbar clicks here
 
  switch (event.GetId()) {
    case ID_ZOOMIN: {
      ZoomCanvasSimple(g_plus_minus_zoom_factor);
      break;
    }
 
    case ID_ZOOMOUT: {
      ZoomCanvasSimple(1.0 / g_plus_minus_zoom_factor);
      break;
    }
 
    case ID_STKUP:
      DoCanvasStackDelta(1);
      DoCanvasUpdate();
      break;
 
    case ID_STKDN:
      DoCanvasStackDelta(-1);
      DoCanvasUpdate();
      break;
 
    case ID_FOLLOW: {
      TogglebFollow();
      break;
    }
 
    case ID_CURRENT: {
      ShowCurrents(!GetbShowCurrent());
      ReloadVP();
      Refresh(false);
      break;
    }
 
    case ID_TIDE: {
      ShowTides(!GetbShowTide());
      ReloadVP();
      Refresh(false);
      break;
    }
 
    case ID_ROUTE: {
      if (0 == m_routeState) {
        StartRoute();
      } else {
        FinishRoute();
      }
 
#ifdef __ANDROID__
      androidSetRouteAnnunciator(m_routeState == 1);
#endif
      break;
    }
 
    case ID_AIS: {
      SetAISCanvasDisplayStyle(-1);
      break;
    }
 
    default:
      break;
  }
 
  //  And then let  gFrame handle the rest....
  event.Skip();
}
 
void ChartCanvas::SetShowAIS(bool show) {
  m_bShowAIS = show;
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
}
 
void ChartCanvas::SetAttenAIS(bool show) {
  m_bShowAISScaled = show;
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
}
 
void ChartCanvas::SetAISCanvasDisplayStyle(int StyleIndx) {
  // make some arrays to hold the dfferences between cycle steps
  // show all, scaled, hide all
  bool bShowAIS_Array[3] = {true, true, false};
  bool bShowScaled_Array[3] = {false, true, true};
  wxString ToolShortHelp_Array[3] = {_("Show all AIS Targets"),
                                     _("Attenuate less critical AIS targets"),
                                     _("Hide AIS Targets")};
  wxString iconName_Array[3] = {"AIS", "AIS_Suppressed", "AIS_Disabled"};
  int ArraySize = 3;
  int AIS_Toolbar_Switch = 0;
  if (StyleIndx == -1) {  // -1 means coming from toolbar button
    // find current state of switch
    for (int i = 1; i < ArraySize; i++) {
      if ((bShowAIS_Array[i] == m_bShowAIS) &&
          (bShowScaled_Array[i] == m_bShowAISScaled))
        AIS_Toolbar_Switch = i;
    }
    AIS_Toolbar_Switch++;  // we did click so continu with next item
    if ((!g_bAllowShowScaled) && (AIS_Toolbar_Switch == 1))
      AIS_Toolbar_Switch++;
 
  } else {  // coming from menu bar.
    AIS_Toolbar_Switch = StyleIndx;
  }
  // make sure we are not above array
  if (AIS_Toolbar_Switch >= ArraySize) AIS_Toolbar_Switch = 0;
 
  int AIS_Toolbar_Switch_Next =
      AIS_Toolbar_Switch + 1;  // Find out what will happen at next click
  if ((!g_bAllowShowScaled) && (AIS_Toolbar_Switch_Next == 1))
    AIS_Toolbar_Switch_Next++;
  if (AIS_Toolbar_Switch_Next >= ArraySize)
    AIS_Toolbar_Switch_Next = 0;  // If at end of cycle start at 0
 
  // Set found values to global and member variables
  m_bShowAIS = bShowAIS_Array[AIS_Toolbar_Switch];
  m_bShowAISScaled = bShowScaled_Array[AIS_Toolbar_Switch];
}
 
void ChartCanvas::TouchAISToolActive() {}
 
void ChartCanvas::UpdateAISTBTool() {}
 
//---------------------------------------------------------------------------------
//
//      Compass/GPS status icon support
//
//---------------------------------------------------------------------------------
 
void ChartCanvas::UpdateGPSCompassStatusBox(bool b_force_new) {
  //    Look for change in overlap or positions
  bool b_update = false;
  int cc1_edge_comp = 2;
  wxRect rect = m_Compass->GetRect();
  wxSize parent_size = GetSize();
 
  parent_size *= m_displayScale;
 
  // check to see if it would overlap if it was in its home position (upper
  // right)
  wxPoint compass_pt(parent_size.x - rect.width - cc1_edge_comp,
                     g_StyleManager->GetCurrentStyle()->GetCompassYOffset());
  wxRect compass_rect(compass_pt, rect.GetSize());
 
  m_Compass->Move(compass_pt);
 
  if (m_Compass && m_Compass->IsShown())
    m_Compass->UpdateStatus(b_force_new | b_update);
 
  double scaler = g_Platform->GetCompassScaleFactor(g_GUIScaleFactor);
  scaler = wxMax(scaler, 1.0);
  wxPoint note_point = wxPoint(
      parent_size.x - (scaler * 20 * wxWindow::GetCharWidth()), compass_rect.y);
  if (m_notification_button) {
    m_notification_button->Move(note_point);
    m_notification_button->UpdateStatus();
  }
 
  if (b_force_new | b_update) Refresh();
}
 
void ChartCanvas::SelectChartFromStack(int index, bool bDir,
                                       ChartTypeEnum New_Type,
                                       ChartFamilyEnum New_Family) {
  if (!GetpCurrentStack()) return;
  if (!ChartData) return;
 
  if (index < GetpCurrentStack()->nEntry) {
    //      Open the new chart
    ChartBase *pTentative_Chart;
    pTentative_Chart = ChartData->OpenStackChartConditional(
        GetpCurrentStack(), index, bDir, New_Type, New_Family);
 
    if (pTentative_Chart) {
      if (m_singleChart) m_singleChart->Deactivate();
 
      m_singleChart = pTentative_Chart;
      m_singleChart->Activate();
 
      GetpCurrentStack()->CurrentStackEntry = ChartData->GetStackEntry(
          GetpCurrentStack(), m_singleChart->GetFullPath());
    }
 
    //      Setup the view
    double zLat, zLon;
    if (m_bFollow) {
      zLat = gLat;
      zLon = gLon;
    } else {
      zLat = m_vLat;
      zLon = m_vLon;
    }
 
    double best_scale_ppm = GetBestVPScale(m_singleChart);
    double rotation = GetVPRotation();
    double oldskew = GetVPSkew();
    double newskew = m_singleChart->GetChartSkew() * PI / 180.0;
 
    if (!g_bskew_comp && (GetUpMode() == NORTH_UP_MODE)) {
      if (fabs(oldskew) > 0.0001) rotation = 0.0;
      if (fabs(newskew) > 0.0001) rotation = newskew;
    }
 
    SetViewPoint(zLat, zLon, best_scale_ppm, newskew, rotation);
 
    UpdateGPSCompassStatusBox(true);  // Pick up the rotation
  }
 
  //  refresh Piano
  int idx = GetpCurrentStack()->GetCurrentEntrydbIndex();
  if (idx < 0) return;
 
  std::vector<int> piano_active_chart_index_array;
  piano_active_chart_index_array.push_back(
      GetpCurrentStack()->GetCurrentEntrydbIndex());
  m_Piano->SetActiveKeyArray(piano_active_chart_index_array);
}
 
void ChartCanvas::SelectdbChart(int dbindex) {
  if (!GetpCurrentStack()) return;
  if (!ChartData) return;
 
  if (dbindex >= 0) {
    //      Open the new chart
    ChartBase *pTentative_Chart;
    pTentative_Chart = ChartData->OpenChartFromDB(dbindex, FULL_INIT);
 
    if (pTentative_Chart) {
      if (m_singleChart) m_singleChart->Deactivate();
 
      m_singleChart = pTentative_Chart;
      m_singleChart->Activate();
 
      GetpCurrentStack()->CurrentStackEntry = ChartData->GetStackEntry(
          GetpCurrentStack(), m_singleChart->GetFullPath());
    }
 
    //      Setup the view
    double zLat, zLon;
    if (m_bFollow) {
      zLat = gLat;
      zLon = gLon;
    } else {
      zLat = m_vLat;
      zLon = m_vLon;
    }
 
    double best_scale_ppm = GetBestVPScale(m_singleChart);
 
    if (m_singleChart)
      SetViewPoint(zLat, zLon, best_scale_ppm,
                   m_singleChart->GetChartSkew() * PI / 180., GetVPRotation());
 
    // SetChartUpdatePeriod( );
 
    // UpdateGPSCompassStatusBox();           // Pick up the rotation
  }
 
  // TODO refresh_Piano();
}
 
void ChartCanvas::selectCanvasChartDisplay(int type, int family) {
  double target_scale = GetVP().view_scale_ppm;
 
  if (!GetQuiltMode()) {
    if (GetpCurrentStack()) {
      int stack_index = -1;
      for (int i = 0; i < GetpCurrentStack()->nEntry; i++) {
        int check_dbIndex = GetpCurrentStack()->GetDBIndex(i);
        if (check_dbIndex < 0) continue;
        const ChartTableEntry &cte =
            ChartData->GetChartTableEntry(check_dbIndex);
        if (type == cte.GetChartType()) {
          stack_index = i;
          break;
        } else if (family == cte.GetChartFamily()) {
          stack_index = i;
          break;
        }
      }
 
      if (stack_index >= 0) {
        SelectChartFromStack(stack_index);
      }
    }
  } else {
    int sel_dbIndex = -1;
    std::vector<int> piano_chart_index_array =
        GetQuiltExtendedStackdbIndexArray();
    for (unsigned int i = 0; i < piano_chart_index_array.size(); i++) {
      int check_dbIndex = piano_chart_index_array[i];
      const ChartTableEntry &cte = ChartData->GetChartTableEntry(check_dbIndex);
      if (type == cte.GetChartType()) {
        if (IsChartQuiltableRef(check_dbIndex)) {
          sel_dbIndex = check_dbIndex;
          break;
        }
      } else if (family == cte.GetChartFamily()) {
        if (IsChartQuiltableRef(check_dbIndex)) {
          sel_dbIndex = check_dbIndex;
          break;
        }
      }
    }
 
    if (sel_dbIndex >= 0) {
      SelectQuiltRefdbChart(sel_dbIndex, false);  // no autoscale
      //  Re-qualify the quilt reference chart selection
      AdjustQuiltRefChart();
    }
 
    //  Now reset the scale to the target...
    SetVPScale(target_scale);
  }
 
  SetQuiltChartHiLiteIndex(-1);
 
  ReloadVP();
}
 
bool ChartCanvas::IsTileOverlayIndexInYesShow(int index) {
  return std::find(m_tile_yesshow_index_array.begin(),
                   m_tile_yesshow_index_array.end(),
                   index) != m_tile_yesshow_index_array.end();
}
 
bool ChartCanvas::IsTileOverlayIndexInNoShow(int index) {
  return std::find(m_tile_noshow_index_array.begin(),
                   m_tile_noshow_index_array.end(),
                   index) != m_tile_noshow_index_array.end();
}
 
void ChartCanvas::AddTileOverlayIndexToNoShow(int index) {
  if (std::find(m_tile_noshow_index_array.begin(),
                m_tile_noshow_index_array.end(),
                index) == m_tile_noshow_index_array.end()) {
    m_tile_noshow_index_array.push_back(index);
  }
}
 
//-------------------------------------------------------------------------------------------------------
//
//      Piano support
//
//-------------------------------------------------------------------------------------------------------
 
void ChartCanvas::HandlePianoClick(
    int selected_index, const std::vector<int> &selected_dbIndex_array) {
  if (g_options && g_options->IsShown())
    return;  // Piano might be invalid due to chartset updates.
  if (!m_pCurrentStack) return;
  if (!ChartData) return;
 
  // stop movement or on slow computer we may get something like :
  // zoom out with the wheel (timer is set)
  // quickly click and display a chart, which may zoom in
  // but the delayed timer fires first and it zooms out again!
  StopMovement();
 
  //  When switching by piano key click, we may appoint the new target chart to
  //  be any chart in the composite array.
  // As an improvement to UX, find the chart that is "closest" to the current
  // vp,
  //  and select that chart.  This will cause a jump to the centroid of that
  //  chart
 
  double distance = 25000;  // RTW
  int closest_index = -1;
  for (int chart_index : selected_dbIndex_array) {
    const ChartTableEntry &cte = ChartData->GetChartTableEntry(chart_index);
    double chart_lat = (cte.GetLatMax() + cte.GetLatMin()) / 2;
    double chart_lon = (cte.GetLonMax() + cte.GetLonMin()) / 2;
 
    // measure distance as Manhattan style
    double test_distance = abs(m_vLat - chart_lat) + abs(m_vLon - chart_lon);
    if (test_distance < distance) {
      distance = test_distance;
      closest_index = chart_index;
    }
  }
 
  int selected_dbIndex = selected_dbIndex_array[0];
  if (closest_index >= 0) selected_dbIndex = closest_index;
 
  if (!GetQuiltMode()) {
    if (m_bpersistent_quilt /* && g_bQuiltEnable*/) {
      if (IsChartQuiltableRef(selected_dbIndex)) {
        ToggleCanvasQuiltMode();
        SelectQuiltRefdbChart(selected_dbIndex);
        m_bpersistent_quilt = false;
      } else {
        SelectChartFromStack(selected_index);
      }
    } else {
      SelectChartFromStack(selected_index);
      g_sticky_chart = selected_dbIndex;
    }
 
    if (m_singleChart)
      GetVP().SetProjectionType(m_singleChart->GetChartProjectionType());
  } else {
    // Handle MBTiles overlays first
    // Left click simply toggles the noshow array index entry
    if (CHART_TYPE_MBTILES == ChartData->GetDBChartType(selected_dbIndex)) {
      bool bfound = false;
      for (unsigned int i = 0; i < m_tile_noshow_index_array.size(); i++) {
        if (m_tile_noshow_index_array[i] ==
            selected_dbIndex) {  // chart is in the noshow list
          m_tile_noshow_index_array.erase(m_tile_noshow_index_array.begin() +
                                          i);  // erase it
          bfound = true;
          break;
        }
      }
      if (!bfound) {
        m_tile_noshow_index_array.push_back(selected_dbIndex);
      }
 
      // If not already present, add this tileset to the "yes_show" array.
      if (!IsTileOverlayIndexInYesShow(selected_dbIndex))
        m_tile_yesshow_index_array.push_back(selected_dbIndex);
    }
 
    else {
      if (IsChartQuiltableRef(selected_dbIndex)) {
        //            if( ChartData ) ChartData->PurgeCache();
 
        //  If the chart is a vector chart, and of very large scale,
        //  then we had better set the new scale directly to avoid excessive
        //  underzoom on, eg, Inland ENCs
        bool set_scale = false;
        if (CHART_TYPE_S57 == ChartData->GetDBChartType(selected_dbIndex)) {
          if (ChartData->GetDBChartScale(selected_dbIndex) < 5000) {
            set_scale = true;
          }
        }
 
        if (!set_scale) {
          SelectQuiltRefdbChart(selected_dbIndex, true);  // autoscale
        } else {
          SelectQuiltRefdbChart(selected_dbIndex, false);  // no autoscale
 
          //  Adjust scale so that the selected chart is underzoomed/overzoomed
          //  by a controlled amount
          ChartBase *pc =
              ChartData->OpenChartFromDB(selected_dbIndex, FULL_INIT);
          if (pc) {
            double proposed_scale_onscreen =
                GetCanvasScaleFactor() / GetVPScale();
 
            if (g_bPreserveScaleOnX) {
              proposed_scale_onscreen =
                  wxMin(proposed_scale_onscreen,
                        100 * pc->GetNormalScaleMax(GetCanvasScaleFactor(),
                                                    GetCanvasWidth()));
            } else {
              proposed_scale_onscreen =
                  wxMin(proposed_scale_onscreen,
                        20 * pc->GetNormalScaleMax(GetCanvasScaleFactor(),
                                                   GetCanvasWidth()));
 
              proposed_scale_onscreen =
                  wxMax(proposed_scale_onscreen,
                        pc->GetNormalScaleMin(GetCanvasScaleFactor(),
                                              g_b_overzoom_x));
            }
 
            SetVPScale(GetCanvasScaleFactor() / proposed_scale_onscreen);
          }
        }
      } else {
        ToggleCanvasQuiltMode();
        SelectdbChart(selected_dbIndex);
        m_bpersistent_quilt = true;
      }
    }
  }
 
  SetQuiltChartHiLiteIndex(-1);
  gFrame->UpdateGlobalMenuItems();  // update the state of the menu items
                                    // (checkmarks etc)
  HideChartInfoWindow();
  DoCanvasUpdate();
  ReloadVP();  // Pick up the new selections
}
 
void ChartCanvas::HandlePianoRClick(
    int x, int y, int selected_index,
    const std::vector<int> &selected_dbIndex_array) {
  if (g_options && g_options->IsShown())
    return;  // Piano might be invalid due to chartset updates.
  if (!GetpCurrentStack()) return;
 
  PianoPopupMenu(x, y, selected_index, selected_dbIndex_array);
  UpdateCanvasControlBar();
 
  SetQuiltChartHiLiteIndex(-1);
}
 
void ChartCanvas::HandlePianoRollover(
    int selected_index, const std::vector<int> &selected_dbIndex_array,
    int n_charts, int scale) {
  if (g_options && g_options->IsShown())
    return;  // Piano might be invalid due to chartset updates.
  if (!GetpCurrentStack()) return;
  if (!ChartData) return;
 
  if (ChartData->IsBusy()) return;
 
  wxPoint key_location = m_Piano->GetKeyOrigin(selected_index);
 
  if (!GetQuiltMode()) {
    ShowChartInfoWindow(key_location.x, selected_dbIndex_array[0]);
  } else {
    // Select the correct vector
    std::vector<int> piano_chart_index_array;
    if (m_Piano->GetPianoMode() == PIANO_MODE_LEGACY) {
      piano_chart_index_array = GetQuiltExtendedStackdbIndexArray();
      if ((GetpCurrentStack()->nEntry > 1) ||
          (piano_chart_index_array.size() >= 1)) {
        ShowChartInfoWindow(key_location.x, selected_dbIndex_array[0]);
 
        SetQuiltChartHiLiteIndexArray(selected_dbIndex_array);
        ReloadVP(false);  // no VP adjustment allowed
      } else if (GetpCurrentStack()->nEntry == 1) {
        const ChartTableEntry &cte =
            ChartData->GetChartTableEntry(GetpCurrentStack()->GetDBIndex(0));
        if (CHART_TYPE_CM93COMP != cte.GetChartType()) {
          ShowChartInfoWindow(key_location.x, selected_dbIndex_array[0]);
          ReloadVP(false);
        } else if ((-1 == selected_index) &&
                   (0 == selected_dbIndex_array.size())) {
          ShowChartInfoWindow(key_location.x, -1);
        }
      }
    } else {
      piano_chart_index_array = GetQuiltFullScreendbIndexArray();
 
      if ((GetpCurrentStack()->nEntry > 1) ||
          (piano_chart_index_array.size() >= 1)) {
        if (n_charts > 1)
          ShowCompositeInfoWindow(key_location.x, n_charts, scale,
                                  selected_dbIndex_array);
        else if (n_charts == 1)
          ShowChartInfoWindow(key_location.x, selected_dbIndex_array[0]);
 
        SetQuiltChartHiLiteIndexArray(selected_dbIndex_array);
        ReloadVP(false);  // no VP adjustment allowed
      }
    }
  }
}
 
void ChartCanvas::ClearPianoRollover() {
  ClearQuiltChartHiLiteIndexArray();
  ShowChartInfoWindow(0, -1);
  std::vector<int> vec;
  ShowCompositeInfoWindow(0, 0, 0, vec);
  ReloadVP(false);
}
 
void ChartCanvas::UpdateCanvasControlBar() {
  if (m_pianoFrozen) return;
 
  if (!GetpCurrentStack()) return;
  if (!ChartData) return;
  if (!g_bShowChartBar) return;
 
  int sel_type = -1;
  int sel_family = -1;
 
  std::vector<int> piano_chart_index_array;
  std::vector<int> empty_piano_chart_index_array;
 
  wxString old_hash = m_Piano->GetStoredHash();
 
  if (GetQuiltMode()) {
    m_Piano->SetKeyArray(GetQuiltExtendedStackdbIndexArray(),
                         GetQuiltFullScreendbIndexArray());
 
    std::vector<int> piano_active_chart_index_array =
        GetQuiltCandidatedbIndexArray();
    m_Piano->SetActiveKeyArray(piano_active_chart_index_array);
 
    std::vector<int> piano_eclipsed_chart_index_array =
        GetQuiltEclipsedStackdbIndexArray();
    m_Piano->SetEclipsedIndexArray(piano_eclipsed_chart_index_array);
 
    m_Piano->SetNoshowIndexArray(m_quilt_noshow_index_array);
    m_Piano->AddNoshowIndexArray(m_tile_noshow_index_array);
 
    sel_type = ChartData->GetDBChartType(GetQuiltReferenceChartIndex());
    sel_family = ChartData->GetDBChartFamily(GetQuiltReferenceChartIndex());
  } else {
    piano_chart_index_array = ChartData->GetCSArray(GetpCurrentStack());
    m_Piano->SetKeyArray(piano_chart_index_array, piano_chart_index_array);
    // TODO refresh_Piano();
 
    if (m_singleChart) {
      sel_type = m_singleChart->GetChartType();
      sel_family = m_singleChart->GetChartFamily();
    }
  }
 
  //    Set up the TMerc and Skew arrays
  std::vector<int> piano_skew_chart_index_array;
  std::vector<int> piano_tmerc_chart_index_array;
  std::vector<int> piano_poly_chart_index_array;
 
  for (unsigned int ino = 0; ino < piano_chart_index_array.size(); ino++) {
    const ChartTableEntry &ctei =
        ChartData->GetChartTableEntry(piano_chart_index_array[ino]);
    double skew_norm = ctei.GetChartSkew();
    if (skew_norm > 180.) skew_norm -= 360.;
 
    if (ctei.GetChartProjectionType() == PROJECTION_TRANSVERSE_MERCATOR)
      piano_tmerc_chart_index_array.push_back(piano_chart_index_array[ino]);
 
    //    Polyconic skewed charts should show as skewed
    else if (ctei.GetChartProjectionType() == PROJECTION_POLYCONIC) {
      if (fabs(skew_norm) > 1.)
        piano_skew_chart_index_array.push_back(piano_chart_index_array[ino]);
      else
        piano_poly_chart_index_array.push_back(piano_chart_index_array[ino]);
    } else if (fabs(skew_norm) > 1.)
      piano_skew_chart_index_array.push_back(piano_chart_index_array[ino]);
  }
  m_Piano->SetSkewIndexArray(piano_skew_chart_index_array);
  m_Piano->SetTmercIndexArray(piano_tmerc_chart_index_array);
  m_Piano->SetPolyIndexArray(piano_poly_chart_index_array);
 
  wxString new_hash = m_Piano->GenerateAndStoreNewHash();
  if (new_hash != old_hash) {
    m_Piano->FormatKeys();
    HideChartInfoWindow();
    m_Piano->ResetRollover();
    SetQuiltChartHiLiteIndex(-1);
    m_brepaint_piano = true;
  }
 
  // Create a bitmask int that describes what Family/Type of charts are shown in
  // the bar, and notify the platform.
  int mask = 0;
  for (unsigned int ino = 0; ino < piano_chart_index_array.size(); ino++) {
    const ChartTableEntry &ctei =
        ChartData->GetChartTableEntry(piano_chart_index_array[ino]);
    ChartFamilyEnum e = (ChartFamilyEnum)ctei.GetChartFamily();
    ChartTypeEnum t = (ChartTypeEnum)ctei.GetChartType();
    if (e == CHART_FAMILY_RASTER) mask |= 1;
    if (e == CHART_FAMILY_VECTOR) {
      if (t == CHART_TYPE_CM93COMP)
        mask |= 4;
      else
        mask |= 2;
    }
  }
 
  wxString s_indicated;
  if (sel_type == CHART_TYPE_CM93COMP)
    s_indicated = "cm93";
  else {
    if (sel_family == CHART_FAMILY_RASTER)
      s_indicated = "raster";
    else if (sel_family == CHART_FAMILY_VECTOR)
      s_indicated = "vector";
  }
 
  g_Platform->setChartTypeMaskSel(mask, s_indicated);
}
 
void ChartCanvas::FormatPianoKeys() { m_Piano->FormatKeys(); }
 
void ChartCanvas::PianoPopupMenu(
    int x, int y, int selected_index,
    const std::vector<int> &selected_dbIndex_array) {
  if (!GetpCurrentStack()) return;
 
  //    No context menu if quilting is disabled
  if (!GetQuiltMode()) return;
 
  m_piano_ctx_menu = new wxMenu();
 
  if (m_Piano->GetPianoMode() == PIANO_MODE_COMPOSITE) {
    //    m_piano_ctx_menu->Append(ID_PIANO_EXPAND_PIANO, _("Legacy chartbar"));
    //    Connect(ID_PIANO_EXPAND_PIANO, wxEVT_COMMAND_MENU_SELECTED,
    //            wxCommandEventHandler(ChartCanvas::OnPianoMenuExpandChartbar));
  } else {
    //    m_piano_ctx_menu->Append(ID_PIANO_CONTRACT_PIANO, _("Fullscreen
    //    chartbar")); Connect(ID_PIANO_CONTRACT_PIANO,
    //    wxEVT_COMMAND_MENU_SELECTED,
    //            wxCommandEventHandler(ChartCanvas::OnPianoMenuContractChartbar));
 
    menu_selected_dbIndex = selected_dbIndex_array[0];
    menu_selected_index = selected_index;
 
    //    Search the no-show array
    bool b_is_in_noshow = false;
    for (unsigned int i = 0; i < m_quilt_noshow_index_array.size(); i++) {
      if (m_quilt_noshow_index_array[i] ==
          menu_selected_dbIndex)  // chart is in the noshow list
      {
        b_is_in_noshow = true;
        break;
      }
    }
 
    if (b_is_in_noshow) {
      m_piano_ctx_menu->Append(ID_PIANO_ENABLE_QUILT_CHART,
                               _("Show This Chart"));
      Connect(ID_PIANO_ENABLE_QUILT_CHART, wxEVT_COMMAND_MENU_SELECTED,
              wxCommandEventHandler(ChartCanvas::OnPianoMenuEnableChart));
    } else if (GetpCurrentStack()->nEntry > 1) {
      m_piano_ctx_menu->Append(ID_PIANO_DISABLE_QUILT_CHART,
                               _("Hide This Chart"));
      Connect(ID_PIANO_DISABLE_QUILT_CHART, wxEVT_COMMAND_MENU_SELECTED,
              wxCommandEventHandler(ChartCanvas::OnPianoMenuDisableChart));
    }
  }
 
  wxPoint pos = wxPoint(x, y - 30);
 
  //        Invoke the drop-down menu
  if (m_piano_ctx_menu->GetMenuItems().GetCount())
    PopupMenu(m_piano_ctx_menu, pos);
 
  delete m_piano_ctx_menu;
  m_piano_ctx_menu = NULL;
 
  HideChartInfoWindow();
  m_Piano->ResetRollover();
 
  SetQuiltChartHiLiteIndex(-1);
  ClearQuiltChartHiLiteIndexArray();
 
  ReloadVP();
}
 
void ChartCanvas::OnPianoMenuEnableChart(wxCommandEvent &event) {
  for (unsigned int i = 0; i < m_quilt_noshow_index_array.size(); i++) {
    if (m_quilt_noshow_index_array[i] ==
        menu_selected_dbIndex)  // chart is in the noshow list
    {
      m_quilt_noshow_index_array.erase(m_quilt_noshow_index_array.begin() + i);
      break;
    }
  }
}
 
void ChartCanvas::OnPianoMenuDisableChart(wxCommandEvent &event) {
  if (!GetpCurrentStack()) return;
  if (!ChartData) return;
 
  RemoveChartFromQuilt(menu_selected_dbIndex);
 
  //      It could happen that the chart being disabled is the reference
  //      chart....
  if (menu_selected_dbIndex == GetQuiltRefChartdbIndex()) {
    int type = ChartData->GetDBChartType(menu_selected_dbIndex);
 
    int i = menu_selected_index + 1;  // select next smaller scale chart
    bool b_success = false;
    while (i < GetpCurrentStack()->nEntry - 1) {
      int dbIndex = GetpCurrentStack()->GetDBIndex(i);
      if (type == ChartData->GetDBChartType(dbIndex)) {
        SelectQuiltRefChart(i);
        b_success = true;
        break;
      }
      i++;
    }
 
    //    If that did not work, try to select the next larger scale compatible
    //    chart
    if (!b_success) {
      i = menu_selected_index - 1;
      while (i > 0) {
        int dbIndex = GetpCurrentStack()->GetDBIndex(i);
        if (type == ChartData->GetDBChartType(dbIndex)) {
          SelectQuiltRefChart(i);
          b_success = true;
          break;
        }
        i--;
      }
    }
  }
}
 
void ChartCanvas::RemoveChartFromQuilt(int dbIndex) {
  //    Remove the item from the list (if it appears) to avoid multiple addition
  for (unsigned int i = 0; i < m_quilt_noshow_index_array.size(); i++) {
    if (m_quilt_noshow_index_array[i] ==
        dbIndex)  // chart is already in the noshow list
    {
      m_quilt_noshow_index_array.erase(m_quilt_noshow_index_array.begin() + i);
      break;
    }
  }
 
  m_quilt_noshow_index_array.push_back(dbIndex);
}
 
bool ChartCanvas::UpdateS52State() {
  bool retval = false;
 
  if (ps52plib) {
    ps52plib->SetShowS57Text(m_encShowText);
    ps52plib->SetDisplayCategory((DisCat)m_encDisplayCategory);
    ps52plib->m_bShowSoundg = m_encShowDepth;
    ps52plib->m_bShowAtonText = m_encShowBuoyLabels;
    ps52plib->m_bShowLdisText = m_encShowLightDesc;
 
    // Lights
    if (!m_encShowLights)  // On, going off
      ps52plib->AddObjNoshow("LIGHTS");
    else  // Off, going on
      ps52plib->RemoveObjNoshow("LIGHTS");
    ps52plib->SetLightsOff(!m_encShowLights);
    ps52plib->m_bExtendLightSectors = true;
 
    // TODO ps52plib->m_bShowAtons = m_encShowBuoys;
    ps52plib->SetAnchorOn(m_encShowAnchor);
    ps52plib->SetQualityOfData(m_encShowDataQual);
  }
 
  return retval;
}
 
void ChartCanvas::SetShowENCDataQual(bool show) {
  m_encShowDataQual = show;
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
 
  m_s52StateHash = 0;  // Force a S52 PLIB re-configure
}
 
void ChartCanvas::SetShowENCText(bool show) {
  m_encShowText = show;
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
 
  m_s52StateHash = 0;  // Force a S52 PLIB re-configure
}
 
void ChartCanvas::SetENCDisplayCategory(int category) {
  m_encDisplayCategory = category;
  m_s52StateHash = 0;  // Force a S52 PLIB re-configure
}
 
void ChartCanvas::SetShowENCDepth(bool show) {
  m_encShowDepth = show;
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
 
  m_s52StateHash = 0;  // Force a S52 PLIB re-configure
}
 
void ChartCanvas::SetShowENCLightDesc(bool show) {
  m_encShowLightDesc = show;
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
 
  m_s52StateHash = 0;  // Force a S52 PLIB re-configure
}
 
void ChartCanvas::SetShowENCBuoyLabels(bool show) {
  m_encShowBuoyLabels = show;
  m_s52StateHash = 0;  // Force a S52 PLIB re-configure
}
 
void ChartCanvas::SetShowENCLights(bool show) {
  m_encShowLights = show;
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
 
  m_s52StateHash = 0;  // Force a S52 PLIB re-configure
}
 
void ChartCanvas::SetShowENCAnchor(bool show) {
  m_encShowAnchor = show;
  if (GetMUIBar() && GetMUIBar()->GetCanvasOptions())
    GetMUIBar()->GetCanvasOptions()->RefreshControlValues();
 
  m_s52StateHash = 0;  // Force a S52 PLIB re-configure
}
 
wxRect ChartCanvas::GetMUIBarRect() {
  wxRect rv;
  if (m_muiBar) {
    rv = m_muiBar->GetRect();
  }
 
  return rv;
}
 
void ChartCanvas::RenderAlertMessage(wxDC &dc, const ViewPort &vp) {
  if (!GetAlertString().IsEmpty()) {
    wxFont *pfont = wxTheFontList->FindOrCreateFont(
        10, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
 
    dc.SetFont(*pfont);
    dc.SetPen(*wxTRANSPARENT_PEN);
 
    dc.SetBrush(wxColour(243, 229, 47));
    int w, h;
    dc.GetMultiLineTextExtent(GetAlertString(), &w, &h);
    h += 2;
    // int yp = vp.pix_height - 20 - h;
 
    wxRect sbr = GetScaleBarRect();
    int xp = sbr.x + sbr.width + 10;
    int yp = (sbr.y + sbr.height) - h;
 
    int wdraw = w + 10;
    dc.DrawRectangle(xp, yp, wdraw, h);
    dc.DrawLabel(GetAlertString(), wxRect(xp, yp, wdraw, h),
                 wxALIGN_CENTRE_HORIZONTAL | wxALIGN_CENTRE_VERTICAL);
  }
}
 
//--------------------------------------------------------------------------------------------------------
//    Screen Brightness Control Support Routines
//
//--------------------------------------------------------------------------------------------------------
 
#ifdef __UNIX__
#define BRIGHT_XCALIB
#define __OPCPN_USEICC__
#endif
 
#ifdef __OPCPN_USEICC__
int CreateSimpleICCProfileFile(const char *file_name, double co_red,
                               double co_green, double co_blue);
 
wxString temp_file_name;
#endif
 
#if 0
class ocpnCurtain: public wxDialog
{
    DECLARE_CLASS( ocpnCurtain )
    DECLARE_EVENT_TABLE()
 
public:
    ocpnCurtain( wxWindow *parent, wxPoint position, wxSize size, long wstyle );
    ~ocpnCurtain( );
    bool ProcessEvent(wxEvent& event);
 
};
 
IMPLEMENT_CLASS ( ocpnCurtain, wxDialog )
 
BEGIN_EVENT_TABLE(ocpnCurtain, wxDialog)
END_EVENT_TABLE()
 
ocpnCurtain::ocpnCurtain( wxWindow *parent, wxPoint position, wxSize size, long wstyle )
{
    wxDialog::Create( parent, -1, "ocpnCurtain", position, size, wxNO_BORDER | wxSTAY_ON_TOP );
}
 
ocpnCurtain::~ocpnCurtain()
{
}
 
bool ocpnCurtain::ProcessEvent(wxEvent& event)
{
    GetParent()->GetEventHandler()->SetEvtHandlerEnabled(true);
    return GetParent()->GetEventHandler()->ProcessEvent(event);
}
#endif
 
#ifdef _WIN32
#include <windows.h>
 
HMODULE hGDI32DLL;
typedef BOOL(WINAPI *SetDeviceGammaRamp_ptr_type)(HDC hDC, LPVOID lpRampTable);
typedef BOOL(WINAPI *GetDeviceGammaRamp_ptr_type)(HDC hDC, LPVOID lpRampTable);
SetDeviceGammaRamp_ptr_type
    g_pSetDeviceGammaRamp;  // the API entry points in the dll
GetDeviceGammaRamp_ptr_type g_pGetDeviceGammaRamp;
 
WORD *g_pSavedGammaMap;
 
#endif
 
int InitScreenBrightness() {
#ifdef _WIN32
#ifdef ocpnUSE_GL
  if (gFrame->GetPrimaryCanvas()->GetglCanvas() && g_bopengl) {
    HDC hDC;
    BOOL bbr;
 
    if (NULL == hGDI32DLL) {
      hGDI32DLL = LoadLibrary(TEXT("gdi32.dll"));
 
      if (NULL != hGDI32DLL) {
        // Get the entry points of the required functions
        g_pSetDeviceGammaRamp = (SetDeviceGammaRamp_ptr_type)GetProcAddress(
            hGDI32DLL, "SetDeviceGammaRamp");
        g_pGetDeviceGammaRamp = (GetDeviceGammaRamp_ptr_type)GetProcAddress(
            hGDI32DLL, "GetDeviceGammaRamp");
 
        //    If the functions are not found, unload the DLL and return false
        if ((NULL == g_pSetDeviceGammaRamp) ||
            (NULL == g_pGetDeviceGammaRamp)) {
          FreeLibrary(hGDI32DLL);
          hGDI32DLL = NULL;
          return 0;
        }
      }
    }
 
    //    Interface is ready, so....
    //    Get some storage
    if (!g_pSavedGammaMap) {
      g_pSavedGammaMap = (WORD *)malloc(3 * 256 * sizeof(WORD));
 
      hDC = GetDC(NULL);  // Get the full screen DC
      bbr = g_pGetDeviceGammaRamp(
          hDC, g_pSavedGammaMap);  // Get the existing ramp table
      ReleaseDC(NULL, hDC);        // Release the DC
    }
 
    //    On Windows hosts, try to adjust the registry to allow full range
    //    setting of Gamma table This is an undocumented Windows hack.....
    wxRegKey *pRegKey = new wxRegKey(
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows "
        "NT\\CurrentVersion\\ICM");
    if (!pRegKey->Exists()) pRegKey->Create();
    pRegKey->SetValue("GdiIcmGammaRange", 256);
 
    g_brightness_init = true;
    return 1;
  }
#endif
 
  {
    if (NULL == g_pcurtain) {
      if (gFrame->CanSetTransparent()) {
        //    Build the curtain window
        g_pcurtain = new wxDialog(gFrame->GetPrimaryCanvas(), -1, "",
                                  wxPoint(0, 0), ::wxGetDisplaySize(),
                                  wxNO_BORDER | wxTRANSPARENT_WINDOW |
                                      wxSTAY_ON_TOP | wxDIALOG_NO_PARENT);
 
        //                  g_pcurtain = new ocpnCurtain(gFrame,
        //                  wxPoint(0,0),::wxGetDisplaySize(),
        //                      wxNO_BORDER | wxTRANSPARENT_WINDOW
        //                      |wxSTAY_ON_TOP | wxDIALOG_NO_PARENT);
 
        g_pcurtain->Hide();
 
        HWND hWnd = GetHwndOf(g_pcurtain);
        SetWindowLong(hWnd, GWL_EXSTYLE,
                      GetWindowLong(hWnd, GWL_EXSTYLE) | ~WS_EX_APPWINDOW);
        g_pcurtain->SetBackgroundColour(wxColour(0, 0, 0));
        g_pcurtain->SetTransparent(0);
 
        g_pcurtain->Maximize();
        g_pcurtain->Show();
 
        //    All of this is obtuse, but necessary for Windows...
        g_pcurtain->Enable();
        g_pcurtain->Disable();
 
        gFrame->Disable();
        gFrame->Enable();
        // SetFocus();
      }
    }
    g_brightness_init = true;
 
    return 1;
  }
#else
  //    Look for "xcalib" application
  wxString cmd("xcalib -version");
 
  wxArrayString output;
  long r = wxExecute(cmd, output);
  if (0 != r)
    wxLogMessage(
        "   External application \"xcalib\" not found. Screen brightness "
        "not changed.");
 
  g_brightness_init = true;
  return 0;
#endif
}
 
int RestoreScreenBrightness() {
#ifdef _WIN32
 
  if (g_pSavedGammaMap) {
    HDC hDC = GetDC(NULL);  // Get the full screen DC
    g_pSetDeviceGammaRamp(hDC,
                          g_pSavedGammaMap);  // Restore the saved ramp table
    ReleaseDC(NULL, hDC);                     // Release the DC
 
    free(g_pSavedGammaMap);
    g_pSavedGammaMap = NULL;
  }
 
  if (g_pcurtain) {
    g_pcurtain->Close();
    g_pcurtain->Destroy();
    g_pcurtain = NULL;
  }
 
  g_brightness_init = false;
  return 1;
 
#endif
 
#ifdef BRIGHT_XCALIB
  if (g_brightness_init) {
    wxString cmd;
    cmd = "xcalib -clear";
    wxExecute(cmd, wxEXEC_ASYNC);
    g_brightness_init = false;
  }
 
  return 1;
#endif
 
  return 0;
}
 
//    Set brightness. [0..100]
int SetScreenBrightness(int brightness) {
#ifdef _WIN32
 
  //    Under Windows, we use the SetDeviceGammaRamp function which exists in
  //    some (most modern?) versions of gdi32.dll Load the required library dll,
  //    if not already in place
#ifdef ocpnUSE_GL
  if (gFrame->GetPrimaryCanvas()->GetglCanvas() && g_bopengl) {
    if (g_pcurtain) {
      g_pcurtain->Close();
      g_pcurtain->Destroy();
      g_pcurtain = NULL;
    }
 
    InitScreenBrightness();
 
    if (NULL == hGDI32DLL) {
      // Unicode stuff.....
      wchar_t wdll_name[80];
      MultiByteToWideChar(0, 0, "gdi32.dll", -1, wdll_name, 80);
      LPCWSTR cstr = wdll_name;
 
      hGDI32DLL = LoadLibrary(cstr);
 
      if (NULL != hGDI32DLL) {
        // Get the entry points of the required functions
        g_pSetDeviceGammaRamp = (SetDeviceGammaRamp_ptr_type)GetProcAddress(
            hGDI32DLL, "SetDeviceGammaRamp");
        g_pGetDeviceGammaRamp = (GetDeviceGammaRamp_ptr_type)GetProcAddress(
            hGDI32DLL, "GetDeviceGammaRamp");
 
        //    If the functions are not found, unload the DLL and return false
        if ((NULL == g_pSetDeviceGammaRamp) ||
            (NULL == g_pGetDeviceGammaRamp)) {
          FreeLibrary(hGDI32DLL);
          hGDI32DLL = NULL;
          return 0;
        }
      }
    }
 
    HDC hDC = GetDC(NULL);  // Get the full screen DC
 
    /*
     int cmcap = GetDeviceCaps(hDC, COLORMGMTCAPS);
     if (cmcap != CM_GAMMA_RAMP)
     {
     wxLogMessage("    Video hardware does not support brightness control by
     gamma ramp adjustment."); return false;
     }
     */
 
    int increment = brightness * 256 / 100;
 
    // Build the Gamma Ramp table
    WORD GammaTable[3][256];
 
    int table_val = 0;
    for (int i = 0; i < 256; i++) {
      GammaTable[0][i] = r_gamma_mult * (WORD)table_val;
      GammaTable[1][i] = g_gamma_mult * (WORD)table_val;
      GammaTable[2][i] = b_gamma_mult * (WORD)table_val;
 
      table_val += increment;
 
      if (table_val > 65535) table_val = 65535;
    }
 
    g_pSetDeviceGammaRamp(hDC, GammaTable);  // Set the ramp table
    ReleaseDC(NULL, hDC);                    // Release the DC
 
    return 1;
  }
#endif
 
  {
    if (g_pSavedGammaMap) {
      HDC hDC = GetDC(NULL);  // Get the full screen DC
      g_pSetDeviceGammaRamp(hDC,
                            g_pSavedGammaMap);  // Restore the saved ramp table
      ReleaseDC(NULL, hDC);                     // Release the DC
    }
 
    if (brightness < 100) {
      if (NULL == g_pcurtain) InitScreenBrightness();
 
      if (g_pcurtain) {
        int sbrite = wxMax(1, brightness);
        sbrite = wxMin(100, sbrite);
 
        g_pcurtain->SetTransparent((100 - sbrite) * 256 / 100);
      }
    } else {
      if (g_pcurtain) {
        g_pcurtain->Close();
        g_pcurtain->Destroy();
        g_pcurtain = NULL;
      }
    }
 
    return 1;
  }
 
#endif
 
#ifdef BRIGHT_XCALIB
 
  if (!g_brightness_init) {
    last_brightness = 100;
    g_brightness_init = true;
    temp_file_name = wxFileName::CreateTempFileName("");
    InitScreenBrightness();
  }
 
#ifdef __OPCPN_USEICC__
  //  Create a dead simple temporary ICC profile file, with gamma ramps set as
  //  desired, and then activate this temporary profile using xcalib <filename>
  if (!CreateSimpleICCProfileFile(
          (const char *)temp_file_name.fn_str(), brightness * r_gamma_mult,
          brightness * g_gamma_mult, brightness * b_gamma_mult)) {
    wxString cmd("xcalib ");
    cmd += temp_file_name;
 
    wxExecute(cmd, wxEXEC_ASYNC);
  }
 
#else
  //    Or, use "xcalib -co" to set overall contrast value
  //    This is not as nice, since the -co parameter wants to be a fraction of
  //    the current contrast, and values greater than 100 are not allowed.  As a
  //    result, increases of contrast must do a "-clear" step first, which
  //    produces objectionable flashing.
  if (brightness > last_brightness) {
    wxString cmd;
    cmd = "xcalib -clear";
    wxExecute(cmd, wxEXEC_ASYNC);
 
    ::wxMilliSleep(10);
 
    int brite_adj = wxMax(1, brightness);
    cmd.Printf("xcalib -co %2d -a", brite_adj);
    wxExecute(cmd, wxEXEC_ASYNC);
  } else {
    int brite_adj = wxMax(1, brightness);
    int factor = (brite_adj * 100) / last_brightness;
    factor = wxMax(1, factor);
    wxString cmd;
    cmd.Printf("xcalib -co %2d -a", factor);
    wxExecute(cmd, wxEXEC_ASYNC);
  }
 
#endif
 
  last_brightness = brightness;
 
#endif
 
  return 0;
}
 
#ifdef __OPCPN_USEICC__
 
#define MLUT_TAG 0x6d4c5554L
#define VCGT_TAG 0x76636774L
 
int GetIntEndian(unsigned char *s) {
  int ret;
  unsigned char *p;
  int i;
 
  p = (unsigned char *)&ret;
 
  if (1)
    for (i = sizeof(int) - 1; i > -1; --i) *p++ = s[i];
  else
    for (i = 0; i < (int)sizeof(int); ++i) *p++ = s[i];
 
  return ret;
}
 
unsigned short GetShortEndian(unsigned char *s) {
  unsigned short ret;
  unsigned char *p;
  int i;
 
  p = (unsigned char *)&ret;
 
  if (1)
    for (i = sizeof(unsigned short) - 1; i > -1; --i) *p++ = s[i];
  else
    for (i = 0; i < (int)sizeof(unsigned short); ++i) *p++ = s[i];
 
  return ret;
}
 
//    Create a very simple Gamma correction file readable by xcalib
int CreateSimpleICCProfileFile(const char *file_name, double co_red,
                               double co_green, double co_blue) {
  FILE *fp;
 
  if (file_name) {
    fp = fopen(file_name, "wb");
    if (!fp) return -1; /* file can not be created */
  } else
    return -1; /* filename char pointer not valid */
 
  //    Write header
  char header[128];
  for (int i = 0; i < 128; i++) header[i] = 0;
 
  fwrite(header, 128, 1, fp);
 
  //    Num tags
  int numTags0 = 1;
  int numTags = GetIntEndian((unsigned char *)&numTags0);
  fwrite(&numTags, 1, 4, fp);
 
  int tagName0 = VCGT_TAG;
  int tagName = GetIntEndian((unsigned char *)&tagName0);
  fwrite(&tagName, 1, 4, fp);
 
  int tagOffset0 = 128 + 4 * sizeof(int);
  int tagOffset = GetIntEndian((unsigned char *)&tagOffset0);
  fwrite(&tagOffset, 1, 4, fp);
 
  int tagSize0 = 1;
  int tagSize = GetIntEndian((unsigned char *)&tagSize0);
  fwrite(&tagSize, 1, 4, fp);
 
  fwrite(&tagName, 1, 4, fp);  // another copy of tag
 
  fwrite(&tagName, 1, 4, fp);  // dummy
 
  //  Table type
 
  /* VideoCardGammaTable (The simplest type) */
  int gammatype0 = 0;
  int gammatype = GetIntEndian((unsigned char *)&gammatype0);
  fwrite(&gammatype, 1, 4, fp);
 
  int numChannels0 = 3;
  unsigned short numChannels = GetShortEndian((unsigned char *)&numChannels0);
  fwrite(&numChannels, 1, 2, fp);
 
  int numEntries0 = 256;
  unsigned short numEntries = GetShortEndian((unsigned char *)&numEntries0);
  fwrite(&numEntries, 1, 2, fp);
 
  int entrySize0 = 1;
  unsigned short entrySize = GetShortEndian((unsigned char *)&entrySize0);
  fwrite(&entrySize, 1, 2, fp);
 
  unsigned char ramp[256];
 
  //    Red ramp
  for (int i = 0; i < 256; i++) ramp[i] = i * co_red / 100.;
  fwrite(ramp, 256, 1, fp);
 
  //    Green ramp
  for (int i = 0; i < 256; i++) ramp[i] = i * co_green / 100.;
  fwrite(ramp, 256, 1, fp);
 
  //    Blue ramp
  for (int i = 0; i < 256; i++) ramp[i] = i * co_blue / 100.;
  fwrite(ramp, 256, 1, fp);
 
  fclose(fp);
 
  return 0;
}
#endif  // __OPCPN_USEICC__