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   wxBitmap bitmap( 100, 100 );
  81
  82   wxMemoryDC dc;
  83   dc.SelectObject( bitmap );
  84   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
  85   dc.SetPen( *wxWHITE_PEN );
  86   dc.DrawRectangle( 0, 0, 100, 100 );
  87   dc.SelectObject( wxNullBitmap );
  88
  89   wxImage image( bitmap );
  90   image.SaveFile( "../test.png", wxBITMAP_TYPE_PNG );
  91
  92   image.LoadFile( "../horse.png", wxBITMAP_TYPE_PNG );
  93   my_horse = new wxBitmap( image.ConvertToBitmap() );
  94
  95   image.LoadFile( "../test.png", wxBITMAP_TYPE_PNG );
  96   my_square = new wxBitmap( image.ConvertToBitmap() );
  97 }
  98
  99 MyCanvas::~MyCanvas(void)
 100 {
 101   delete my_horse;
 102   delete my_square;
 103 }
 104
 105 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 106 {
 107   wxPaintDC dc( this );
 108   PrepareDC( dc );
 109
 110   dc.DrawText( "Loaded image", 30, 100 );
 111   if (my_square->Ok()) dc.DrawBitmap( *my_square, 30, 120 );
 112
 113   dc.DrawText( "Drawn directly", 150, 100 );
 114   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 115   dc.SetPen( *wxWHITE_PEN );
 116   dc.DrawRectangle( 150, 120, 100, 100 );
 117
 118   if (my_horse->Ok()) dc.DrawBitmap( *my_horse, 30, 240 );
 119 }
 120
 121 // MyFrame
 122
 123 const int ID_QUIT  = 108;
 124 const int ID_ABOUT = 109;
 125
 126 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 127
 128 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 129   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 130   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 131   EVT_SIZE    (MyFrame::OnSize)
 132 END_EVENT_TABLE()
 133
 134 MyFrame::MyFrame(void) :
 135   wxFrame( (wxFrame *) NULL, -1, "wxImage sample", wxPoint(20,20), wxSize(470,360) )
 136 {
 137   wxMenu *file_menu = new wxMenu();
 138   file_menu->Append( ID_ABOUT, "About..");
 139   file_menu->Append( ID_QUIT, "Exit");
 140
 141   wxMenuBar *menu_bar = new wxMenuBar();
 142   menu_bar->Append(file_menu, "File");
 143   menu_bar->Show( TRUE );
 144
 145   SetMenuBar( menu_bar );
 146
 147   CreateStatusBar(2);
 148   int widths[] = { -1, 100 };
 149   SetStatusWidths( 2, widths );
 150
 151   m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
 152   m_canvas->SetScrollbars( 10, 10, 50, 50 );
 153 }
 154
 155 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 156 {
 157   Close( TRUE );
 158 }
 159
 160 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 161 {
 162   (void) wxMessageBox( "wxImage demo\nRobert Roebling (c) 1998", "About wxImage Demo", wxOK );
 163 }
 164
 165 void MyFrame::OnSize( wxSizeEvent &WXUNUSED(event) )
 166 {
 167   int w,h;
 168   GetClientSize( &w, &h );
 169   m_canvas->SetSize( w, h );
 170 }
 171
 172 //-----------------------------------------------------------------------------
 173 // MyApp
 174 //-----------------------------------------------------------------------------
 175
 176 MyApp::MyApp(void) :
 177   wxApp( )
 178 {
 179 }
 180
 181 bool MyApp::OnInit(void)
 182 {
 183   wxImage::AddHandler( new wxPNGHandler );
 184
 185   wxFrame *frame = new MyFrame();
 186   frame->Show( TRUE );
 187
 188   return TRUE;
 189 }
 190
 191
 192
 193
 194