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     wxBitmap  *my_square;
  33
  34   DECLARE_EVENT_TABLE()
  35 };
  36
  37 // MyFrame
  38
  39 class MyFrame: public wxFrame
  40 {
  41   DECLARE_DYNAMIC_CLASS(MyFrame)
  42
  43   public:
  44
  45     MyFrame(void);
  46     void OnSize( wxSizeEvent &event );
  47     void OnAbout( wxCommandEvent &event );
  48     void OnQuit( wxCommandEvent &event );
  49
  50     MyCanvas         *m_canvas;
  51
  52   DECLARE_EVENT_TABLE()
  53 };
  54
  55 // MyApp
  56
  57 class MyApp: public wxApp
  58 {
  59   public:
  60
  61     MyApp(void);
  62     virtual bool OnInit(void);
  63 };
  64
  65 // main program
  66
  67 IMPLEMENT_APP(MyApp)
  68
  69 // MyCanvas
  70
  71 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
  72
  73 BEGIN_EVENT_TABLE(MyCanvas,wxScrolledWindow)
  74   EVT_PAINT  (MyCanvas::OnPaint)
  75 END_EVENT_TABLE()
  76
  77 MyCanvas::MyCanvas( wxWindow *parent, const wxWindowID id, const wxPoint &pos, const wxSize &size )
  78   : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
  79 {
  80   wxImage image;
  81
  82   wxBitmap bitmap( 100, 100 );
  83
  84   wxMemoryDC dc;
  85   dc.SelectObject( bitmap );
  86   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
  87   dc.SetPen( *wxWHITE_PEN );
  88   dc.DrawRectangle( 0, 0, 100, 100 );
  89   dc.SelectObject( wxNullBitmap );
  90
  91   image = bitmap.ConvertToImage();
  92   image.SaveFile( "../test.png", wxBITMAP_TYPE_PNG );
  93
  94   image.LoadFile( "../horse.png", wxBITMAP_TYPE_PNG );
  95   my_horse = new wxBitmap( image );
  96
  97   image.LoadFile( "../test.png", wxBITMAP_TYPE_PNG );
  98   my_square = new wxBitmap( image );
  99 }
 100
 101 MyCanvas::~MyCanvas(void)
 102 {
 103   delete my_horse;
 104   delete my_square;
 105 }
 106
 107 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 108 {
 109   wxPaintDC dc( this );
 110   PrepareDC( dc );
 111
 112   dc.DrawText( "Loaded image", 30, 100 );
 113   if (my_square->Ok()) dc.DrawBitmap( *my_square, 30, 120 );
 114
 115   dc.DrawText( "Drawn directly", 150, 100 );
 116   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 117   dc.SetPen( *wxWHITE_PEN );
 118   dc.DrawRectangle( 150, 120, 100, 100 );
 119
 120   if (my_horse->Ok()) dc.DrawBitmap( *my_horse, 30, 240 );
 121 }
 122
 123 // MyFrame
 124
 125 const  ID_QUIT  = 108;
 126 const  ID_ABOUT = 109;
 127
 128 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 129
 130 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 131   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 132   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 133 END_EVENT_TABLE()
 134
 135 MyFrame::MyFrame(void) :
 136   wxFrame( (wxFrame *) NULL, -1, "wxImage sample", wxPoint(20,20), wxSize(470,360) )
 137 {
 138   wxMenu *file_menu = new wxMenu();
 139   file_menu->Append( ID_ABOUT, "About..");
 140   file_menu->Append( ID_QUIT, "Exit");
 141
 142   wxMenuBar *menu_bar = new wxMenuBar();
 143   menu_bar->Append(file_menu, "File");
 144   menu_bar->Show( TRUE );
 145
 146   SetMenuBar( menu_bar );
 147
 148   CreateStatusBar(2);
 149   int widths[] = { -1, 100 };
 150   SetStatusWidths( 2, widths );
 151
 152   m_canvas = new MyCanvas( this, -1, wxPoint(2,62), wxSize(300-4,120-4) );
 153   m_canvas->SetScrollbars( 10, 10, 50, 50 );
 154 }
 155
 156 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 157 {
 158   Close( TRUE );
 159 }
 160
 161 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 162 {
 163   (void) wxMessageBox( "wxImage demo\nRobert Roebling (c) 1998", "About wxImage Demo", wxOK );
 164 }
 165
 166 //-----------------------------------------------------------------------------
 167 // MyApp
 168 //-----------------------------------------------------------------------------
 169
 170 MyApp::MyApp(void) :
 171   wxApp( )
 172 {
 173 }
 174
 175 bool MyApp::OnInit(void)
 176 {
 177   wxImage::AddHandler( new wxPNGHandler );
 178
 179   wxFrame *frame = new MyFrame();
 180   frame->Show( TRUE );
 181
 182   return TRUE;
 183 }
 184
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 188