route_gui.cpp

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/**************************************************************************
 *   Copyright (C) 2022 by David Register                                  *
 *   Copyright (C) 2022 Alec Leamas                                        *
 *   Copyright (C) 2025 NoCodeHummel                                       *
 *                                                                         *
 *   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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
 **************************************************************************/
 
#include <string>
 
#include <wx/colour.h>
#include <wx/gdicmn.h>
#include <wx/pen.h>
#include <wx/string.h>
#include <wx/utils.h>
 
#include "dialog_alert.h"
 
#include "color_handler.h"
#include "chartbase.h"
#include "model/comm_n0183_output.h"
#include "model/georef.h"
#include "gui_lib.h"
#include "model/multiplexer.h"
#include "n0183_ctx_factory.h"
#include "navutil.h"
#include "model/own_ship.h"
#include "model/routeman.h"
#include "route_gui.h"
#include "route_point_gui.h"
#include "glChartCanvas.h"
#include "line_clip.h"
#include "model/route.h"
 
extern Routeman *g_pRouteMan;
extern wxColour g_colourTrackLineColour;
extern Multiplexer *g_pMUX;
 
extern wxColor GetDimColor(wxColor c);
extern bool g_bHighliteTracks;
 
extern ocpnGLOptions g_GLOptions;
 
extern int s_arrow_icon[];
 
static void TestLongitude(double lon, double min, double max, bool &lonl,
                          bool &lonr) {
  double clon = (min + max) / 2;
  if (min - lon > 180) lon += 360;
 
  lonl = lonr = false;
  if (lon < min) {
    if (lon < clon - 180)
      lonr = true;
    else
      lonl = true;
  } else if (lon > max) {
    if (lon > clon + 180)
      lonl = true;
    else
      lonr = true;
  }
}
 
void RouteGui::Draw(ocpnDC &dc, ChartCanvas *canvas, const LLBBox &box) {
  if (m_route.pRoutePointList->empty()) return;
 
  ViewPort vp = canvas->GetVP();
 
  LLBBox test_box = m_route.GetBBox();
  if (box.IntersectOut(test_box))  // Route is wholly outside window
    return;
 
  int width = g_route_line_width;
  if (m_route.m_width != WIDTH_UNDEFINED) width = m_route.m_width;
 
  if (m_route.m_bVisible && m_route.m_bRtIsSelected) {
    wxPen spen = *g_pRouteMan->GetSelectedRoutePen();
    spen.SetWidth(width);
    dc.SetPen(spen);
    dc.SetBrush(*g_pRouteMan->GetSelectedRouteBrush());
  } else if (m_route.m_bVisible) {
    wxPenStyle style = wxPENSTYLE_SOLID;
    wxColour col;
    if (m_route.m_style != wxPENSTYLE_INVALID) style = m_route.m_style;
    if (m_route.m_Colour == wxEmptyString) {
      col = g_pRouteMan->GetRoutePen()->GetColour();
    } else {
      for (unsigned int i = 0; i < sizeof(::GpxxColorNames) / sizeof(wxString);
           i++) {
        if (m_route.m_Colour == ::GpxxColorNames[i]) {
          col = ::GpxxColors[i];
          break;
        }
      }
    }
    dc.SetPen(*wxThePenList->FindOrCreatePen(col, width, style));
    dc.SetBrush(*wxTheBrushList->FindOrCreateBrush(col, wxBRUSHSTYLE_SOLID));
  }
 
  if (m_route.m_bVisible && m_route.m_bRtIsActive) {
    wxPen spen = *g_pRouteMan->GetActiveRoutePen();
    spen.SetWidth(width);
    dc.SetPen(spen);
    dc.SetBrush(*g_pRouteMan->GetActiveRouteBrush());
  }
 
  wxPoint rpt1, rpt2;
  if (m_route.m_bVisible) DrawPointWhich(dc, canvas, 1, &rpt1);
 
  wxRoutePointListNode *node = m_route.pRoutePointList->GetFirst();
  RoutePoint *prp1 = node->GetData();
  node = node->GetNext();
 
  if (m_route.m_bVisible || prp1->IsShared())
    RoutePointGui(*prp1).Draw(dc, canvas,
                              NULL);  // prp1->Draw(dc, canvas, NULL);
 
  while (node) {
    RoutePoint *prp2 = node->GetData();
 
    bool draw_arrow = !(prp2->m_bIsActive && g_bAllowShipToActive);
 
    if (m_route.m_bVisible || prp2->IsShared())
      RoutePointGui(*prp2).Draw(dc, canvas,
                                &rpt2);  // prp2->Draw(dc, canvas, &rpt2);
 
    if (m_route.m_bVisible) {
      //    Handle offscreen points
      bool b_2_on = vp.GetBBox().Contains(prp2->m_lat, prp2->m_lon);
      bool b_1_on = vp.GetBBox().Contains(prp1->m_lat, prp1->m_lon);
 
      // Simple case
      if (b_1_on && b_2_on)
        RenderSegment(dc, rpt1.x, rpt1.y, rpt2.x, rpt2.y, vp, draw_arrow,
                      m_route.m_hiliteWidth);  // with arrows
 
      //    In the cases where one point is on, and one off
      //    we must decide which way to go in longitude
      //     Arbitrarily, we will go the shortest way
 
      double pix_full_circle = WGS84_semimajor_axis_meters * mercator_k0 * 2 *
                               PI * vp.view_scale_ppm;
      double dp =
          pow((double)(rpt1.x - rpt2.x), 2) + pow((double)(rpt1.y - rpt2.y), 2);
      double dtest;
      int adder;
      if (b_1_on && !b_2_on) {
        if (rpt2.x < rpt1.x)
          adder = (int)pix_full_circle;
        else
          adder = -(int)pix_full_circle;
 
        dtest = pow((double)(rpt1.x - (rpt2.x + adder)), 2) +
                pow((double)(rpt1.y - rpt2.y), 2);
 
        if (dp < dtest) adder = 0;
 
        RenderSegment(dc, rpt1.x, rpt1.y, rpt2.x + adder, rpt2.y, vp,
                      draw_arrow, m_route.m_hiliteWidth);
      } else if (!b_1_on) {
        if (rpt1.x < rpt2.x)
          adder = (int)pix_full_circle;
        else
          adder = -(int)pix_full_circle;
 
        float rxd = rpt2.x - (rpt1.x + adder);
        float ryd = rpt1.y - rpt2.y;
        dtest = rxd * rxd + ryd * ryd;
 
        if (dp < dtest) adder = 0;
 
        RenderSegment(dc, rpt1.x + adder, rpt1.y, rpt2.x, rpt2.y, vp,
                      draw_arrow, m_route.m_hiliteWidth);
      }
    }
 
    rpt1 = rpt2;
    prp1 = prp2;
 
    node = node->GetNext();
  }
}
 
void RouteGui::RenderSegment(ocpnDC &dc, int xa, int ya, int xb, int yb,
                             ViewPort &vp, bool bdraw_arrow, int hilite_width) {
  //    Get the dc boundary
  int sx, sy;
  dc.GetSize(&sx, &sy);
 
  //    Try to exit early if the segment is nowhere near the screen
  wxRect r(0, 0, sx, sy);
  wxRect s(xa, ya, 1, 1);
  wxRect t(xb, yb, 1, 1);
  s.Union(t);
  if (!r.Intersects(s)) return;
 
  //    Clip the line segment to the dc boundary
  int x0 = xa;
  int y0 = ya;
  int x1 = xb;
  int y1 = yb;
 
  //    If hilite is desired, use a Native Graphics context to render alpha
  //    colours That is, if wxGraphicsContext is available.....
 
  if (hilite_width) {
    if (Visible ==
        cohen_sutherland_line_clip_i(&x0, &y0, &x1, &y1, 0, sx, 0, sy)) {
      wxPen psave = dc.GetPen();
 
      wxColour y = GetGlobalColor(_T ( "YELO1" ));
      wxColour hilt(y.Red(), y.Green(), y.Blue(), 128);
 
      wxPen HiPen(hilt, hilite_width, wxPENSTYLE_SOLID);
 
      dc.SetPen(HiPen);
      dc.StrokeLine(x0, y0, x1, y1);
 
      dc.SetPen(psave);
      dc.StrokeLine(x0, y0, x1, y1);
    }
  } else {
    if (Visible ==
        cohen_sutherland_line_clip_i(&x0, &y0, &x1, &y1, 0, sx, 0, sy))
      dc.StrokeLine(x0, y0, x1, y1);
  }
 
  if (bdraw_arrow) {
    //    Draw a direction arrow
 
    double theta = atan2((double)(yb - ya), (double)(xb - xa));
    theta -= PI / 2.;
 
    wxPoint icon[10];
    double icon_scale_factor = 100 * vp.view_scale_ppm;
    icon_scale_factor = fmin(icon_scale_factor, 1.5);  // Sets the max size
    icon_scale_factor = fmax(icon_scale_factor, .10);
 
    //    Get the absolute line length
    //    and constrain the arrow to be no more than xx% of the line length
    double nom_arrow_size = 20.;
    double max_arrow_to_leg = .20;
    double lpp = sqrt(pow((double)(xa - xb), 2) + pow((double)(ya - yb), 2));
 
    double icon_size = icon_scale_factor * nom_arrow_size;
    if (icon_size > (lpp * max_arrow_to_leg))
      icon_scale_factor = (lpp * max_arrow_to_leg) / nom_arrow_size;
 
    for (int i = 0; i < 7; i++) {
      int j = i * 2;
      double pxa = (double)(s_arrow_icon[j]);
      double pya = (double)(s_arrow_icon[j + 1]);
 
      pya *= icon_scale_factor;
      pxa *= icon_scale_factor;
 
      double px = (pxa * sin(theta)) + (pya * cos(theta));
      double py = (pya * sin(theta)) - (pxa * cos(theta));
 
      icon[i].x = (int)(px) + xb;
      icon[i].y = (int)(py) + yb;
    }
    wxPen savePen = dc.GetPen();
    dc.SetPen(*wxTRANSPARENT_PEN);
    dc.StrokePolygon(6, &icon[0], 0, 0);
    dc.SetPen(savePen);
  }
}
 
void RouteGui::RenderSegmentArrowsGL(ocpnDC &dc, int xa, int ya, int xb, int yb,
                                     ViewPort &vp) {
#ifdef ocpnUSE_GL
  //    Draw a direction arrow
  float icon_scale_factor = 100 * vp.view_scale_ppm;
  icon_scale_factor = fmin(icon_scale_factor, 1.5);  // Sets the max size
  icon_scale_factor = fmax(icon_scale_factor, .10);
 
  //    Get the absolute line length
  //    and constrain the arrow to be no more than xx% of the line length
  float nom_arrow_size = 20.;
  float max_arrow_to_leg = (float).20;
  float lpp = sqrtf(powf((float)(xa - xb), 2) + powf((float)(ya - yb), 2));
 
  float icon_size = icon_scale_factor * nom_arrow_size;
  if (icon_size > (lpp * max_arrow_to_leg))
    icon_scale_factor = (lpp * max_arrow_to_leg) / nom_arrow_size;
 
  float theta = atan2f((float)yb - ya, (float)xb - xa);
  theta -= (float)PI;
 
  // icon_scale_factor = 5;
  wxPoint pts[3];
  // 0
  pts[0].x = s_arrow_icon[0];
  pts[0].y = s_arrow_icon[1];
  pts[1].x = s_arrow_icon[2];
  pts[1].y = s_arrow_icon[3];
  pts[2].x = s_arrow_icon[6];
  pts[2].y = s_arrow_icon[7];
 
  dc.DrawPolygon(3, pts, xb, yb, icon_scale_factor, theta);
 
  // 1
  pts[0].x = s_arrow_icon[2];
  pts[0].y = s_arrow_icon[3];
  pts[1].x = s_arrow_icon[4];
  pts[1].y = s_arrow_icon[5];
  pts[2].x = s_arrow_icon[6];
  pts[2].y = s_arrow_icon[7];
  dc.DrawPolygon(3, pts, xb, yb, icon_scale_factor, theta);
 
  // 2
  pts[0].x = s_arrow_icon[0];
  pts[0].y = -s_arrow_icon[1];
  pts[1].x = s_arrow_icon[2];
  pts[1].y = -s_arrow_icon[3];
  pts[2].x = s_arrow_icon[6];
  pts[2].y = -s_arrow_icon[7];
  dc.DrawPolygon(3, pts, xb, yb, icon_scale_factor, theta);
 
  // 3
  pts[0].x = s_arrow_icon[2];
  pts[0].y = -s_arrow_icon[3];
  pts[1].x = s_arrow_icon[4];
  pts[1].y = -s_arrow_icon[5];
  pts[2].x = s_arrow_icon[6];
  pts[2].y = -s_arrow_icon[7];
  dc.DrawPolygon(3, pts, xb, yb, icon_scale_factor, theta);
 
#endif
}
 
void RouteGui::DrawPointWhich(ocpnDC &dc, ChartCanvas *canvas, int iPoint,
                              wxPoint *rpn) {
  if (iPoint <= m_route.GetnPoints())
    RoutePointGui(*m_route.GetPoint(iPoint)).Draw(dc, canvas, rpn);
}
 
void RouteGui::DrawSegment(ocpnDC &dc, ChartCanvas *canvas, wxPoint *rp1,
                           wxPoint *rp2, ViewPort &vp, bool bdraw_arrow) {
  if (m_route.m_bRtIsSelected)
    dc.SetPen(*g_pRouteMan->GetSelectedRoutePen());
  else if (m_route.m_bRtIsActive)
    dc.SetPen(*g_pRouteMan->GetActiveRoutePen());
  else
    dc.SetPen(*g_pRouteMan->GetRoutePen());
 
  RenderSegment(dc, rp1->x, rp1->y, rp2->x, rp2->y, vp, bdraw_arrow);
}
 
void RouteGui::DrawGL(ViewPort &vp, ChartCanvas *canvas, ocpnDC &dc) {
#ifdef ocpnUSE_GL
  if (m_route.pRoutePointList->empty()) return;
 
  if (!vp.GetBBox().IntersectOut(m_route.GetBBox()) && m_route.m_bVisible)
    DrawGLRouteLines(vp, canvas, dc);
 
  /*  Route points  */
  for (wxRoutePointListNode *node = m_route.pRoutePointList->GetFirst(); node;
       node = node->GetNext()) {
    RoutePoint *prp = node->GetData();
    // Inflate the bounding box a bit to ensure full drawing in accelerated pan
    // mode.
    // TODO this is a little extravagant, assumming a mark is always a large
    // fixed lat/lon extent.
    //  Maybe better to use the mark's drawn box, once it is known.
    if (vp.GetBBox().ContainsMarge(prp->m_lat, prp->m_lon, .5)) {
      if (m_route.m_bVisible || prp->IsShared())
        RoutePointGui(*prp).DrawGL(vp, canvas, dc);
    }
  }
#endif
}
 
void RouteGui::DrawGLRouteLines(ViewPort &vp, ChartCanvas *canvas, ocpnDC &dc) {
#ifdef ocpnUSE_GL
  //  Hiliting first
  //  Being special case to draw something for a 1 point route....
  if (m_route.m_hiliteWidth) {
    wxColour y = GetGlobalColor(_T ( "YELO1" ));
    wxColour hilt(y.Red(), y.Green(), y.Blue(), 128);
 
    wxPen HiPen(hilt, m_route.m_hiliteWidth, wxPENSTYLE_SOLID);
 
    dc.SetPen(HiPen);
 
    DrawGLLines(vp, &dc, canvas);
  }
 
  /* determine color and width */
  wxColour col;
 
  int width = g_pRouteMan->GetRoutePen()->GetWidth();  // g_route_line_width;
  if (m_route.m_width != wxPENSTYLE_INVALID) width = m_route.m_width;
 
  if (m_route.m_bRtIsActive) {
    col = g_pRouteMan->GetActiveRoutePen()->GetColour();
  } else if (m_route.m_bRtIsSelected) {
    col = g_pRouteMan->GetSelectedRoutePen()->GetColour();
  } else {
    if (m_route.m_Colour == wxEmptyString) {
      col = g_pRouteMan->GetRoutePen()->GetColour();
    } else {
      for (unsigned int i = 0; i < sizeof(::GpxxColorNames) / sizeof(wxString);
           i++) {
        if (m_route.m_Colour == ::GpxxColorNames[i]) {
          col = ::GpxxColors[i];
          break;
        }
      }
    }
  }
 
  wxPenStyle style = wxPENSTYLE_SOLID;
  if (m_route.m_style != wxPENSTYLE_INVALID) style = m_route.m_style;
  wxPen p = *wxThePenList->FindOrCreatePen(col, width, style);
  if (glChartCanvas::dash_map.find(style) != glChartCanvas::dash_map.end()) {
    p.SetDashes(2, &glChartCanvas::dash_map[style][0]);
  }
  dc.SetPen(p);
  dc.SetBrush(*wxTheBrushList->FindOrCreateBrush(col, wxBRUSHSTYLE_SOLID));
 
  glLineWidth(wxMax(g_GLMinSymbolLineWidth, width));
 
  dc.SetGLStipple();
 
  DrawGLLines(vp, &dc, canvas);
 
  glDisable(GL_LINE_STIPPLE);
 
  /* direction arrows.. could probably be further optimized for opengl */
  dc.SetPen(*wxThePenList->FindOrCreatePen(col, 1, wxPENSTYLE_SOLID));
 
  wxRoutePointListNode *node = m_route.pRoutePointList->GetFirst();
  wxPoint rpt1, rpt2;
  while (node) {
    RoutePoint *prp = node->GetData();
    canvas->GetCanvasPointPix(prp->m_lat, prp->m_lon, &rpt2);
    if (node != m_route.pRoutePointList->GetFirst()) {
      if (!prp->m_bIsActive || !g_bAllowShipToActive)
        RenderSegmentArrowsGL(dc, rpt1.x, rpt1.y, rpt2.x, rpt2.y, vp);
    }
    rpt1 = rpt2;
    node = node->GetNext();
  }
#endif
}
 
void RouteGui::DrawGLLines(ViewPort &vp, ocpnDC *dc, ChartCanvas *canvas) {
#ifdef ocpnUSE_GL
  float pix_full_circle =
      WGS84_semimajor_axis_meters * mercator_k0 * 2 * PI * vp.view_scale_ppm;
 
  bool r1valid = false;
  wxPoint2DDouble r1;
  wxPoint2DDouble lastpoint;
 
  wxRoutePointListNode *node = m_route.pRoutePointList->GetFirst();
  RoutePoint *prp2 = node->GetData();
  canvas->GetDoubleCanvasPointPix(prp2->m_lat, prp2->m_lon, &lastpoint);
 
  // single point.. make sure it shows up for highlighting
  if (m_route.GetnPoints() == 1 && dc) {
    canvas->GetDoubleCanvasPointPix(prp2->m_lat, prp2->m_lon, &r1);
    dc->DrawLine(r1.m_x, r1.m_y, r1.m_x + 2, r1.m_y + 2);
    return;
  }
 
  //    Handle offscreen points
  LLBBox bbox = vp.GetBBox();
 
  // dc is passed for thicker highlighted lines (performance not very important)
 
  for (node = node->GetNext(); node; node = node->GetNext()) {
    RoutePoint *prp1 = prp2;
    prp2 = node->GetData();
 
    // Provisional, to properly set status of last point in route
    prp2->m_pos_on_screen = false;
    {
      wxPoint2DDouble r2;
      canvas->GetDoubleCanvasPointPix(prp2->m_lat, prp2->m_lon, &r2);
      if (std::isnan(r2.m_x)) {
        r1valid = false;
        continue;
      }
 
      lastpoint = r2;  // For active track segment to ownship
 
      // don't need to perform calculations or render segment
      // if both points are past any edge of the vp
      // TODO: use these optimizations for dc mode
      bool lat1l = prp1->m_lat < bbox.GetMinLat(),
           lat2l = prp2->m_lat < bbox.GetMinLat();
      bool lat1r = prp1->m_lat > bbox.GetMaxLat(),
           lat2r = prp2->m_lat > bbox.GetMaxLat();
      if ((lat1l && lat2l) || (lat1r && lat2r)) {
        r1valid = false;
        prp1->m_pos_on_screen = false;
        continue;
      }
 
      // Possible optimization, not usable if vp crosses IDL (180 E)
      if (!vp.ContainsIDL()) {
        bool lon1l, lon1r, lon2l, lon2r;
        TestLongitude(prp1->m_lon, bbox.GetMinLon(), bbox.GetMaxLon(), lon1l,
                      lon1r);
        TestLongitude(prp2->m_lon, bbox.GetMinLon(), bbox.GetMaxLon(), lon2l,
                      lon2r);
        if ((lon1l && lon2l) || (lon1r && lon2r)) {
          r1valid = false;
          prp1->m_pos_on_screen = false;
          continue;
        }
      }
 
      if (!r1valid) {
        canvas->GetDoubleCanvasPointPix(prp1->m_lat, prp1->m_lon, &r1);
        if (std::isnan(r1.m_x)) continue;
      }
 
      //  we must decide which way to go in longitude
      //  for projections which wrap, in this case, we will render two lines
      //  (one may often be off screen which would be nice to fix but complicate
      //  things here anyway, in some cases both points are on screen, but the
      //  route wraps to either side so two lines are needed to draw this
      //  properly
 
      double adder = 0;
      if ((vp.m_projection_type == PROJECTION_MERCATOR ||
           vp.m_projection_type == PROJECTION_EQUIRECTANGULAR)) {
        float olon = vp.clon > 0 ? vp.clon - 180 : vp.clon + 180;
 
        if (prp1->m_lon < prp2->m_lon) {
          if (prp2->m_lon - prp1->m_lon < 180) {
            if (olon > prp1->m_lon && olon < prp2->m_lon)
              adder = pix_full_circle;
          } else if (olon < prp1->m_lon || olon > prp2->m_lon)
            adder = -pix_full_circle;
        } else if (prp1->m_lon - prp2->m_lon < 180) {
          if (olon < prp1->m_lon && olon > prp2->m_lon)
            adder = -pix_full_circle;
        } else if (olon > prp1->m_lon || olon < prp2->m_lon)
          adder = pix_full_circle;
      }
 
      if (dc)
        if (adder) {
          float adderc = cos(vp.rotation) * adder,
                adders = sin(vp.rotation) * adder;
          dc->DrawLine(r1.m_x, r1.m_y, r2.m_x + adderc, r2.m_y + adders);
          dc->DrawLine(r1.m_x - adderc, r1.m_y - adders, r2.m_x, r2.m_y);
        } else
          dc->DrawLine(r1.m_x, r1.m_y, r2.m_x, r2.m_y);
      else {
      }
 
      r1 = r2;
      r1valid = true;
    }
  }
 
#endif
}
 
void RouteGui::CalculateDCRect(wxDC &dc_route, ChartCanvas *canvas,
                               wxRect *prect) {
  dc_route.ResetBoundingBox();
  dc_route.DestroyClippingRegion();
 
  wxRect update_rect;
 
  // Draw the route in skeleton form on the dc
  // That is, draw only the route points, assuming that the segements will
  // always be fully contained within the resulting rectangle.
  // Can we prove this?
  if (m_route.m_bVisible) {
    wxRoutePointListNode *node = m_route.pRoutePointList->GetFirst();
    while (node) {
      RoutePoint *prp2 = node->GetData();
      bool blink_save = prp2->m_bBlink;
      prp2->m_bBlink = false;
      ocpnDC odc_route(dc_route);
      odc_route.SetVP(canvas->GetVP());
      RoutePointGui(*prp2).Draw(odc_route, canvas, NULL);
      prp2->m_bBlink = blink_save;
 
      wxRect r = prp2->CurrentRect_in_DC;
      // allow for large hilite circles at segment ends
      r.Inflate(m_route.m_hiliteWidth, m_route.m_hiliteWidth);
 
      update_rect.Union(r);
      node = node->GetNext();
    }
  }
 
  *prect = update_rect;
}
 
int RouteGui::SendToGPS(const wxString &com_name, bool bsend_waypoints,
                        SendToGpsDlg *dialog) {
  int result = 0;
 
  N0183DlgCtx dlg_ctx = GetDialogCtx(dialog);
  ::wxBeginBusyCursor();
  result = SendRouteToGPS_N0183(&m_route, com_name, bsend_waypoints, *g_pMUX,
                                dlg_ctx);
  ::wxEndBusyCursor();
 
  wxString msg;
  if (0 == result)
    msg = _("Route Transmitted.");
  else {
    switch (result) {
      case ERR_GARMIN_INITIALIZE:
        msg = _("Error on Route Upload. Garmin GPS not connected");
        break;
      case ERR_GPS_DRIVER_NOT_AVAILAIBLE:
        msg = _("Error on Route Upload. GPS driver not available");
        break;
      case ERR_GARMIN_SEND_MESSAGE:
      default:
        msg = _("Error on Route Upload. Please check logfiles...");
        break;
    }
  }
  OCPNMessageBox(NULL, msg, _("OpenCPN Info"), wxOK | wxICON_INFORMATION);
 
  return (result == 0);
}
 
// Delete the route.
bool RouteGui::OnDelete(wxWindow *parent, const int count) {
  std::string title = _("Route Delete").ToStdString();
  std::string action = _("Delete").ToStdString();
  std::string msg;
  if (count > 1) {
    wxString str = wxString::Format(
        _("Are you sure you want to delete %d routes?"), count);
    msg = str.c_str();
  } else {
    msg = _("Are you sure you want to delete this route?").ToStdString();
  }
 
  AlertDialog dialog(parent, title, action);
  dialog.SetMessage(msg);
  int result = dialog.ShowModal();
  return result == wxID_OK;
}