samples/shaped/shaped.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        shaped.cpp
   3 // Purpose:     Shaped Window sample
   4 // Author:      Robin Dunn
   5 // Modified by:
   6 // Created:     28-Mar-2003
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Robin Dunn
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(__APPLE__)
  21     #pragma implementation "shaped.cpp"
  22     #pragma interface "shaped.cpp"
  23 #endif
  24
  25 // For compilers that support precompilation, includes "wx/wx.h".
  26 #include "wx/wxprec.h"
  27
  28 #ifdef __BORLANDC__
  29     #pragma hdrstop
  30 #endif
  31
  32 // for all others, include the necessary headers
  33 #ifndef WX_PRECOMP
  34     #include "wx/app.h"
  35     #include "wx/log.h"
  36     #include "wx/frame.h"
  37     #include "wx/panel.h"
  38     #include "wx/stattext.h"
  39     #include "wx/menu.h"
  40     #include "wx/layout.h"
  41     #include "wx/msgdlg.h"
  42 #endif
  43
  44 #include "wx/dcclient.h"
  45
  46 // ----------------------------------------------------------------------------
  47 // private classes
  48 // ----------------------------------------------------------------------------
  49
  50 // Define a new application type, each program should derive a class from wxApp
  51 class MyApp : public wxApp
  52 {
  53 public:
  54     // override base class virtuals
  55     // ----------------------------
  56
  57     // this one is called on application startup and is a good place for the app
  58     // initialization (doing it here and not in the ctor allows to have an error
  59     // return: if OnInit() returns false, the application terminates)
  60     virtual bool OnInit();
  61 };
  62
  63
  64 // Define a new frame type: this is going to be our main frame
  65 class ShapedFrame : public wxFrame
  66 {
  67 public:
  68     // ctor(s)
  69     ShapedFrame();
  70     void SetWindowShape();
  71
  72     // event handlers (these functions should _not_ be virtual)
  73     void OnDoubleClick(wxMouseEvent& evt);
  74     void OnLeftDown(wxMouseEvent& evt);
  75     void OnLeftUp(wxMouseEvent& evt);
  76     void OnMouseMove(wxMouseEvent& evt);
  77     void OnExit(wxMouseEvent& evt);
  78     void OnPaint(wxPaintEvent& evt);
  79     void OnWindowCreate(wxWindowCreateEvent& evt);
  80
  81 private:
  82     bool     m_hasShape;
  83     wxBitmap m_bmp;
  84     wxPoint  m_delta;
  85
  86     // any class wishing to process wxWindows events must use this macro
  87     DECLARE_EVENT_TABLE()
  88 };
  89
  90
  91 // ----------------------------------------------------------------------------
  92 // event tables and other macros for wxWindows
  93 // ----------------------------------------------------------------------------
  94
  95 // the event tables connect the wxWindows events with the functions (event
  96 // handlers) which process them. It can be also done at run-time, but for the
  97 // simple menu events like this the static method is much simpler.
  98 BEGIN_EVENT_TABLE(ShapedFrame, wxFrame)
  99     EVT_LEFT_DCLICK(ShapedFrame::OnDoubleClick)
 100     EVT_LEFT_DOWN(ShapedFrame::OnLeftDown)
 101     EVT_LEFT_UP(ShapedFrame::OnLeftUp)
 102     EVT_MOTION(ShapedFrame::OnMouseMove)
 103     EVT_RIGHT_UP(ShapedFrame::OnExit)
 104
 105     EVT_PAINT(ShapedFrame::OnPaint)
 106
 107 #ifdef __WXGTK__
 108     EVT_WINDOW_CREATE(ShapedFrame::OnWindowCreate)
 109 #endif
 110 END_EVENT_TABLE()
 111
 112
 113 // Create a new application object: this macro will allow wxWindows to create
 114 // the application object during program execution (it's better than using a
 115 // static object for many reasons) and also declares the accessor function
 116 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 117 // not wxApp)
 118 IMPLEMENT_APP(MyApp)
 119
 120 // ============================================================================
 121 // implementation
 122 // ============================================================================
 123
 124 // ----------------------------------------------------------------------------
 125 // the application class
 126 // ----------------------------------------------------------------------------
 127
 128 // `Main program' equivalent: the program execution "starts" here
 129 bool MyApp::OnInit()
 130 {
 131     wxInitAllImageHandlers();
 132
 133     // Create the main application window
 134     ShapedFrame *frame = new ShapedFrame();
 135     frame->Show(TRUE);
 136
 137     // success: wxApp::OnRun() will be called which will enter the main message
 138     // loop and the application will run. If we returned FALSE here, the
 139     // application would exit immediately.
 140     return TRUE;
 141 }
 142
 143 // ----------------------------------------------------------------------------
 144 // main frame
 145 // ----------------------------------------------------------------------------
 146
 147 // frame constructor
 148 ShapedFrame::ShapedFrame()
 149        : wxFrame((wxFrame *)NULL, -1, wxEmptyString,
 150                  wxDefaultPosition, wxDefaultSize,
 151                  wxSIMPLE_BORDER | wxFRAME_NO_TASKBAR)
 152 {
 153     m_hasShape = FALSE;
 154     m_bmp = wxBitmap("star.png", wxBITMAP_TYPE_PNG);
 155     SetSize(wxSize(m_bmp.GetWidth(), m_bmp.GetHeight()));
 156     SetToolTip(wxT("Right-click to exit"));
 157 #ifdef __wxMSW__
 158     // On wxGTK we can't do this yet because the window hasn't been created
 159     // yet so we wait until the EVT_WINDOW_CREATE event happens.  On wxMSW it
 160     // has been created so we set the shape now.
 161     SetWindowShape();
 162 #endif
 163 }
 164
 165 void ShapedFrame::SetWindowShape()
 166 {
 167     wxRegion region(m_bmp, *wxWHITE);
 168     m_hasShape = SetShape(region);
 169 }
 170
 171 void ShapedFrame::OnDoubleClick(wxMouseEvent& evt)
 172 {
 173     if (m_hasShape)
 174     {
 175         wxRegion region;
 176         SetShape(region);
 177         m_hasShape = FALSE;
 178     }
 179     else
 180         SetWindowShape();
 181 }
 182
 183 void ShapedFrame::OnLeftDown(wxMouseEvent& evt)
 184 {
 185     CaptureMouse();
 186     wxPoint pos = ClientToScreen(evt.GetPosition());
 187     wxPoint origin = GetPosition();
 188     int dx =  pos.x - origin.x;
 189     int dy = pos.y - origin.y;
 190     m_delta = wxPoint(dx, dy);
 191 }
 192
 193 void ShapedFrame::OnLeftUp(wxMouseEvent& evt)
 194 {
 195     if (HasCapture())
 196         ReleaseMouse();
 197 }
 198
 199 void ShapedFrame::OnMouseMove(wxMouseEvent& evt)
 200 {
 201     if (evt.Dragging() && evt.LeftIsDown())
 202     {
 203         wxPoint pos = ClientToScreen(evt.GetPosition());
 204         Move(wxPoint(pos.x - m_delta.x, pos.y - m_delta.y));
 205     }
 206 }
 207
 208 void ShapedFrame::OnExit(wxMouseEvent& evt)
 209 {
 210     Close();
 211 }
 212
 213 void ShapedFrame::OnPaint(wxPaintEvent& evt)
 214 {
 215     wxPaintDC dc(this);
 216     dc.DrawBitmap(m_bmp, 0, 0, TRUE);
 217 }
 218
 219 void ShapedFrame::OnWindowCreate(wxWindowCreateEvent& evt)
 220 {
 221     SetWindowShape();
 222 }
 223