samples/image/image.cpp

   1 /*
   2  * Program: image
   3  *
   4  * Author: Robert Roebling
   5  *
   6  * Copyright: (C) 1998, Robert Roebling
   7  *
   8  */
   9
  10 #include "wx/wx.h"
  11 #include "wx/image.h"
  12
  13 // derived classes
  14
  15 class MyFrame;
  16 class MyApp;
  17
  18 // MyCanvas
  19
  20 class MyCanvas: public wxScrolledWindow
  21 {
  22   DECLARE_DYNAMIC_CLASS(MyCanvas)
  23
  24   public:
  25
  26     MyCanvas(void) {};
  27     MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
  28     ~MyCanvas(void);
  29     void OnPaint( wxPaintEvent &event );
  30
  31     wxBitmap  *my_horse;
  32
  33   DECLARE_EVENT_TABLE()
  34 };
  35
  36 // MyFrame
  37
  38 class MyFrame: public wxFrame
  39 {
  40   DECLARE_DYNAMIC_CLASS(MyFrame)
  41
  42   public:
  43
  44     MyFrame(void);
  45     void OnSize( wxSizeEvent &event );
  46     void OnAbout( wxCommandEvent &event );
  47     void OnQuit( wxCommandEvent &event );
  48
  49     MyCanvas         *m_canvas;
  50
  51   DECLARE_EVENT_TABLE()
  52 };
  53
  54 // MyApp
  55
  56 class MyApp: public wxApp
  57 {
  58   public:
  59
  60     MyApp(void);
  61     virtual bool OnInit(void);
  62 };
  63
  64 // main program
  65
  66 IMPLEMENT_APP(MyApp)
  67
  68 // MyCanvas
  69
  70 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
  71
  72 BEGIN_EVENT_TABLE(MyCanvas,wxScrolledWindow)
  73   EVT_PAINT  (MyCanvas::OnPaint)
  74 END_EVENT_TABLE()
  75
  76 MyCanvas::MyCanvas( wxWindow *parent, const wxWindowID id, const wxPoint &pos, const wxSize &size )
  77   : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
  78 {
  79   wxImage image;
  80
  81   wxBitmap bitmap( 100, 100 );
  82
  83   wxMemoryDC dc;
  84   dc.SelectObject( bitmap );
  85   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
  86   dc.SetPen( *wxTRANSPARENT_PEN );
  87   dc.DrawRectangle( 0, 0, 100, 100 );
  88   dc.SelectObject( wxNullBitmap );
  89
  90   image = bitmap.ConvertToImage();
  91   image.SaveFile( "../test.png", wxBITMAP_TYPE_PNG );
  92
  93   image.LoadFile( "../test.png", wxBITMAP_TYPE_PNG );
  94   my_horse = new wxBitmap( image );
  95 }
  96
  97 MyCanvas::~MyCanvas(void)
  98 {
  99   delete my_horse;
 100 }
 101
 102 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 103 {
 104   wxPaintDC dc( this );
 105   PrepareDC( dc );
 106
 107   dc.DrawText( "Loaded image", 30, 100 );
 108   if (my_horse->Ok()) dc.DrawBitmap( *my_horse, 30, 120 );
 109
 110   dc.DrawText( "Drawn directly", 150, 100 );
 111   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 112   dc.SetPen( *wxTRANSPARENT_PEN );
 113   dc.DrawRectangle( 150, 120, 100, 100 );
 114 }
 115
 116 // MyFrame
 117
 118 const  ID_QUIT  = 108;
 119 const  ID_ABOUT = 109;
 120
 121 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 122
 123 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 124   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 125   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 126 END_EVENT_TABLE()
 127
 128 MyFrame::MyFrame(void) :
 129   wxFrame( (wxFrame *) NULL, -1, "wxImage sample", wxPoint(20,20), wxSize(470,360) )
 130 {
 131   wxMenu *file_menu = new wxMenu();
 132   file_menu->Append( ID_ABOUT, "About..");
 133   file_menu->Append( ID_QUIT, "Exit");
 134
 135   wxMenuBar *menu_bar = new wxMenuBar();
 136   menu_bar->Append(file_menu, "File");
 137   menu_bar->Show( TRUE );
 138
 139   SetMenuBar( menu_bar );
 140
 141   m_canvas = new MyCanvas( this, -1, wxPoint(2,62), wxSize(300-4,120-4) );
 142   m_canvas->SetScrollbars( 10, 10, 50, 50 );
 143 }
 144
 145 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 146 {
 147   Close( TRUE );
 148 }
 149
 150 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 151 {
 152   (void) wxMessageBox( "wxImage demo\nRobert Roebling (c) 1998", "About wxImage Demo", wxOK );
 153 }
 154
 155 //-----------------------------------------------------------------------------
 156 // MyApp
 157 //-----------------------------------------------------------------------------
 158
 159 MyApp::MyApp(void) :
 160   wxApp( )
 161 {
 162 }
 163
 164 bool MyApp::OnInit(void)
 165 {
 166   wxImage::AddHandler( new wxPNGHandler );
 167
 168   wxFrame *frame = new MyFrame();
 169   frame->Show( TRUE );
 170
 171   return TRUE;
 172 }
 173
 174
 175
 176
 177