GrabberWin.cpp

Go to the documentation of this file.

/***************************************************************************
 *   Copyright (C) 2010 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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
 ***************************************************************************/
#include "wx/wx.h"
 
#include "folder.xpm"
 
#include "GrabberWin.h"
 
//----------------------------------------------------------------------------
// GrabberWindow Implementation
//----------------------------------------------------------------------------
BEGIN_EVENT_TABLE(GribGrabberWin, wxPanel)
EVT_MOUSE_EVENTS(GribGrabberWin::OnMouseEvent)
EVT_PAINT(GribGrabberWin::OnPaint)
END_EVENT_TABLE()
 
GribGrabberWin::GribGrabberWin(wxWindow* parent) {
  Create(parent);
 
  m_bLeftDown = false;
}
 
void GribGrabberWin::OnMouseEvent(wxMouseEvent& event) {
  if (event.RightDown()) {
    wxMouseEvent evt(event);
    ((wxEvtHandler*)GetParent())->ProcessEvent(evt);
    return;
  }
 
  static wxPoint s_gspt;
  int x, y;
 
  event.GetPosition(&x, &y);
  wxPoint spt = ClientToScreen(wxPoint(x, y));
 
#ifdef __WXOSX__
  if (!m_bLeftDown && event.LeftIsDown()) {
    m_bLeftDown = true;
    s_gspt = spt;
    if (!HasCapture()) CaptureMouse();
  } else if (m_bLeftDown && !event.LeftIsDown()) {
    // GetParent()->Move( GetParent()->GetPosition() );
    m_bLeftDown = false;
    if (HasCapture()) ReleaseMouse();
  }
#else
 
  if (event.LeftDown()) {
    s_gspt = spt;
    CaptureMouse();
  }
 
  if (event.LeftUp()) {
    // GetParent()->Move( GetParent()->GetPosition() );
    if (HasCapture()) ReleaseMouse();
  }
#endif
 
  if (event.Dragging()) {
    wxPoint par_pos_old = GetParent()->GetPosition();
 
    wxPoint par_pos = par_pos_old;
    par_pos.x += spt.x - s_gspt.x;
    par_pos.y += spt.y - s_gspt.y;
 
    wxPoint pos_in_parent = GetOCPNCanvasWindow()->ScreenToClient(par_pos);
    wxPoint pos_in_parent_old =
        GetOCPNCanvasWindow()->ScreenToClient(par_pos_old);
 
    // X
    if (pos_in_parent.x < pos_in_parent_old.x) {  // moving left
      if (pos_in_parent.x < 10) {
        pos_in_parent.x = 0;
      }
    } else if (pos_in_parent.x > pos_in_parent_old.x) {  // moving right
      int max_right =
          GetOCPNCanvasWindow()->GetClientSize().x - GetParent()->GetSize().x;
      if (pos_in_parent.x > (max_right - 10)) {
        pos_in_parent.x = max_right;
      }
    }
 
    // Y
    if (pos_in_parent.y < pos_in_parent_old.y) {  // moving up
      if (pos_in_parent.y < 10) {
        pos_in_parent.y = 0;
      }
    } else if (pos_in_parent.y > pos_in_parent_old.y) {  // moving dow
      int max_down =
          GetOCPNCanvasWindow()->GetClientSize().y - GetParent()->GetSize().y;
      if (pos_in_parent.y > (max_down - 10)) {
        pos_in_parent.y = max_down;
      }
    }
 
    wxPoint final_pos = GetOCPNCanvasWindow()->ClientToScreen(pos_in_parent);
 
    GetParent()->Move(final_pos);
 
    s_gspt = spt;
  }
}
 
void GribGrabberWin::OnPaint(wxPaintEvent& event) {
  wxPaintDC dc(this);
  dc.DrawBitmap(m_bitmap, 0, 1, true);
}
 
void GribGrabberWin::Size() {
  wxBitmap bitmap = (wxBitmap(grabber));
  int height = GetParent()->GetSize().y - 2;  // keep a small margin of 2
  int width = height / 2;
 
  wxImage scaled_image = bitmap.ConvertToImage();
  m_bitmap = wxBitmap(scaled_image.Scale(width, height, wxIMAGE_QUALITY_HIGH));
 
  SetSize(wxSize(width, height));
  SetMinSize(wxSize(width, height));
}