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 // For compilers that support precompilation, includes "wx/wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 // for all others, include the necessary headers
  28 #ifndef WX_PRECOMP
  29     #include "wx/app.h"
  30     #include "wx/log.h"
  31     #include "wx/frame.h"
  32     #include "wx/panel.h"
  33     #include "wx/stattext.h"
  34     #include "wx/menu.h"
  35     #include "wx/layout.h"
  36     #include "wx/msgdlg.h"
  37     #include "wx/image.h"
  38 #endif
  39
  40 #include "wx/dcclient.h"
  41 #include "wx/image.h"
  42
  43 // ----------------------------------------------------------------------------
  44 // private classes
  45 // ----------------------------------------------------------------------------
  46
  47 // Define a new application type, each program should derive a class from wxApp
  48 class MyApp : public wxApp
  49 {
  50 public:
  51     // override base class virtuals
  52     // ----------------------------
  53
  54     // this one is called on application startup and is a good place for the app
  55     // initialization (doing it here and not in the ctor allows to have an error
  56     // return: if OnInit() returns false, the application terminates)
  57     virtual bool OnInit();
  58 };
  59
  60
  61 // Define a new frame type: this is going to be our main frame
  62 class ShapedFrame : public wxFrame
  63 {
  64 public:
  65     // ctor(s)
  66     ShapedFrame();
  67     void SetWindowShape();
  68
  69     // event handlers (these functions should _not_ be virtual)
  70     void OnDoubleClick(wxMouseEvent& evt);
  71     void OnLeftDown(wxMouseEvent& evt);
  72     void OnLeftUp(wxMouseEvent& evt);
  73     void OnMouseMove(wxMouseEvent& evt);
  74     void OnExit(wxMouseEvent& evt);
  75     void OnPaint(wxPaintEvent& evt);
  76     void OnWindowCreate(wxWindowCreateEvent& evt);
  77
  78 private:
  79     bool     m_hasShape;
  80     wxBitmap m_bmp;
  81     wxPoint  m_delta;
  82
  83     // any class wishing to process wxWidgets events must use this macro
  84     DECLARE_EVENT_TABLE()
  85 };
  86
  87
  88 // ----------------------------------------------------------------------------
  89 // event tables and other macros for wxWidgets
  90 // ----------------------------------------------------------------------------
  91
  92 // the event tables connect the wxWidgets events with the functions (event
  93 // handlers) which process them. It can be also done at run-time, but for the
  94 // simple menu events like this the static method is much simpler.
  95 BEGIN_EVENT_TABLE(ShapedFrame, wxFrame)
  96     EVT_LEFT_DCLICK(ShapedFrame::OnDoubleClick)
  97     EVT_LEFT_DOWN(ShapedFrame::OnLeftDown)
  98     EVT_LEFT_UP(ShapedFrame::OnLeftUp)
  99     EVT_MOTION(ShapedFrame::OnMouseMove)
 100     EVT_RIGHT_UP(ShapedFrame::OnExit)
 101
 102     EVT_PAINT(ShapedFrame::OnPaint)
 103
 104 #ifdef __WXGTK__
 105     EVT_WINDOW_CREATE(ShapedFrame::OnWindowCreate)
 106 #endif
 107 END_EVENT_TABLE()
 108
 109
 110 // Create a new application object: this macro will allow wxWidgets to create
 111 // the application object during program execution (it's better than using a
 112 // static object for many reasons) and also declares the accessor function
 113 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 114 // not wxApp)
 115 IMPLEMENT_APP(MyApp)
 116
 117 // ============================================================================
 118 // implementation
 119 // ============================================================================
 120
 121 // ----------------------------------------------------------------------------
 122 // the application class
 123 // ----------------------------------------------------------------------------
 124
 125 // `Main program' equivalent: the program execution "starts" here
 126 bool MyApp::OnInit()
 127 {
 128     if ( !wxApp::OnInit() )
 129         return false;
 130
 131     wxInitAllImageHandlers();
 132
 133     // Create the main application window
 134     ShapedFrame *frame = new ShapedFrame();
 135     frame->Show(true);
 136     SetTopWindow(frame);
 137
 138     // success: wxApp::OnRun() will be called which will enter the main message
 139     // loop and the application will run. If we returned false here, the
 140     // application would exit immediately.
 141     return true;
 142 }
 143
 144 // ----------------------------------------------------------------------------
 145 // main frame
 146 // ----------------------------------------------------------------------------
 147
 148 // frame constructor
 149 ShapedFrame::ShapedFrame()
 150        : wxFrame((wxFrame *)NULL, wxID_ANY, wxEmptyString,
 151                   wxDefaultPosition, wxSize(100, 100), //wxDefaultSize,
 152                   0
 153                   | wxFRAME_SHAPED
 154                   | wxSIMPLE_BORDER
 155                   | wxFRAME_NO_TASKBAR
 156                   | wxSTAY_ON_TOP
 157             )
 158 {
 159     m_hasShape = false;
 160     m_bmp = wxBitmap(_T("star.png"), wxBITMAP_TYPE_PNG);
 161     SetSize(wxSize(m_bmp.GetWidth(), m_bmp.GetHeight()));
 162     SetToolTip(wxT("Right-click to exit"));
 163
 164 #ifndef __WXGTK__
 165     // On wxGTK we can't do this yet because the window hasn't been created
 166     // yet so we wait until the EVT_WINDOW_CREATE event happens.  On wxMSW and
 167     // wxMac the window has been created at this point so we go ahead and set
 168     // the shape now.
 169     SetWindowShape();
 170 #endif
 171 }
 172
 173 void ShapedFrame::SetWindowShape()
 174 {
 175     wxRegion region(m_bmp, *wxWHITE);
 176     m_hasShape = SetShape(region);
 177 }
 178
 179 void ShapedFrame::OnDoubleClick(wxMouseEvent& WXUNUSED(evt))
 180 {
 181     if (m_hasShape)
 182     {
 183         wxRegion region;
 184         SetShape(region);
 185         m_hasShape = false;
 186     }
 187     else
 188         SetWindowShape();
 189 }
 190
 191 void ShapedFrame::OnLeftDown(wxMouseEvent& evt)
 192 {
 193     CaptureMouse();
 194     //printf("Mouse captured\n");
 195     wxPoint pos = ClientToScreen(evt.GetPosition());
 196     wxPoint origin = GetPosition();
 197     int dx =  pos.x - origin.x;
 198     int dy = pos.y - origin.y;
 199     m_delta = wxPoint(dx, dy);
 200 }
 201
 202 void ShapedFrame::OnLeftUp(wxMouseEvent& WXUNUSED(evt))
 203 {
 204     if (HasCapture())
 205     {
 206         ReleaseMouse();
 207         //printf("Mouse released\n");
 208     }
 209 }
 210
 211 void ShapedFrame::OnMouseMove(wxMouseEvent& evt)
 212 {
 213     wxPoint pt = evt.GetPosition();
 214     //printf("x:%d   y:%d\n", pt.x, pt.y);
 215     if (evt.Dragging() && evt.LeftIsDown())
 216     {
 217         wxPoint pos = ClientToScreen(pt);
 218         Move(wxPoint(pos.x - m_delta.x, pos.y - m_delta.y));
 219     }
 220 }
 221
 222 void ShapedFrame::OnExit(wxMouseEvent& WXUNUSED(evt))
 223 {
 224     Close();
 225 }
 226
 227 void ShapedFrame::OnPaint(wxPaintEvent& WXUNUSED(evt))
 228 {
 229     wxPaintDC dc(this);
 230     dc.DrawBitmap(m_bmp, 0, 0, true);
 231 }
 232
 233 void ShapedFrame::OnWindowCreate(wxWindowCreateEvent& WXUNUSED(evt))
 234 {
 235     SetWindowShape();
 236 }
 237