samples/image/image.cpp

   1 /*
   2  * Program: image
   3  *
   4  * Author: Robert Roebling
   5  *
   6  * Copyright: (C) 1998, Robert Roebling
   7  *
   8  */
   9
  10 // For compilers that support precompilation, includes "wx/wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #ifdef __BORLANDC__
  14 #pragma hdrstop
  15 #endif
  16
  17 #ifndef WX_PRECOMP
  18 #include "wx/wx.h"
  19 #endif
  20
  21 #include "wx/image.h"
  22
  23 // derived classes
  24
  25 class MyFrame;
  26 class MyApp;
  27
  28 // MyCanvas
  29
  30 class MyCanvas: public wxScrolledWindow
  31 {
  32   DECLARE_DYNAMIC_CLASS(MyCanvas)
  33
  34   public:
  35
  36     MyCanvas(void) {};
  37     MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
  38     ~MyCanvas(void);
  39     void OnPaint( wxPaintEvent &event );
  40
  41     wxBitmap  *my_horse;
  42     wxBitmap  *my_square;
  43
  44   DECLARE_EVENT_TABLE()
  45 };
  46
  47 // MyFrame
  48
  49 class MyFrame: public wxFrame
  50 {
  51   DECLARE_DYNAMIC_CLASS(MyFrame)
  52
  53   public:
  54
  55     MyFrame(void);
  56     void OnSize( wxSizeEvent &event );
  57     void OnAbout( wxCommandEvent &event );
  58     void OnQuit( wxCommandEvent &event );
  59
  60     MyCanvas         *m_canvas;
  61
  62   DECLARE_EVENT_TABLE()
  63 };
  64
  65 // MyApp
  66
  67 class MyApp: public wxApp
  68 {
  69   public:
  70
  71     MyApp(void);
  72     virtual bool OnInit(void);
  73 };
  74
  75 // main program
  76
  77 IMPLEMENT_APP(MyApp)
  78
  79 // MyCanvas
  80
  81 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
  82
  83 BEGIN_EVENT_TABLE(MyCanvas,wxScrolledWindow)
  84   EVT_PAINT  (MyCanvas::OnPaint)
  85 END_EVENT_TABLE()
  86
  87 MyCanvas::MyCanvas( wxWindow *parent, const wxWindowID id, const wxPoint &pos, const wxSize &size )
  88   : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
  89 {
  90   SetBackgroundColour(* wxWHITE);
  91
  92   wxBitmap bitmap( 100, 100 );
  93
  94   wxMemoryDC dc;
  95   dc.SelectObject( bitmap );
  96   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
  97   dc.SetPen( *wxWHITE_PEN );
  98   dc.DrawRectangle( 0, 0, 100, 100 );
  99   dc.SelectObject( wxNullBitmap );
 100
 101   wxString dir("");
 102
 103 #ifdef __WXGTK__
 104   dir = wxString("../");
 105 #endif
 106
 107   wxImage image( bitmap );
 108   image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG );
 109
 110   image.LoadFile( dir + wxString("horse.png"), wxBITMAP_TYPE_PNG );
 111   my_horse = new wxBitmap( image.ConvertToBitmap() );
 112
 113   image.LoadFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG );
 114   my_square = new wxBitmap( image.ConvertToBitmap() );
 115 }
 116
 117 MyCanvas::~MyCanvas(void)
 118 {
 119   delete my_horse;
 120   delete my_square;
 121 }
 122
 123 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 124 {
 125   wxPaintDC dc( this );
 126   PrepareDC( dc );
 127
 128   dc.DrawText( "Loaded image", 30, 100 );
 129   if (my_square->Ok()) dc.DrawBitmap( *my_square, 30, 120 );
 130
 131   dc.DrawText( "Drawn directly", 150, 100 );
 132   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 133   dc.SetPen( *wxWHITE_PEN );
 134   dc.DrawRectangle( 150, 120, 100, 100 );
 135
 136   if (my_horse->Ok()) dc.DrawBitmap( *my_horse, 30, 240 );
 137 }
 138
 139 // MyFrame
 140
 141 const int ID_QUIT  = 108;
 142 const int ID_ABOUT = 109;
 143
 144 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 145
 146 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 147   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 148   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 149   EVT_SIZE    (MyFrame::OnSize)
 150 END_EVENT_TABLE()
 151
 152 MyFrame::MyFrame(void) :
 153   wxFrame( (wxFrame *) NULL, -1, "wxImage sample", wxPoint(20,20), wxSize(470,360) )
 154 {
 155   wxMenu *file_menu = new wxMenu();
 156   file_menu->Append( ID_ABOUT, "About..");
 157   file_menu->Append( ID_QUIT, "Exit");
 158
 159   wxMenuBar *menu_bar = new wxMenuBar();
 160   menu_bar->Append(file_menu, "File");
 161
 162   SetMenuBar( menu_bar );
 163
 164   CreateStatusBar(2);
 165   int widths[] = { -1, 100 };
 166   SetStatusWidths( 2, widths );
 167
 168   m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
 169   m_canvas->SetScrollbars( 10, 10, 50, 50 );
 170 }
 171
 172 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 173 {
 174   Close( TRUE );
 175 }
 176
 177 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 178 {
 179   (void) wxMessageBox( "wxImage demo\nRobert Roebling (c) 1998", "About wxImage Demo", wxOK );
 180 }
 181
 182 void MyFrame::OnSize( wxSizeEvent &WXUNUSED(event) )
 183 {
 184   int w,h;
 185   GetClientSize( &w, &h );
 186   if (m_canvas)
 187     m_canvas->SetSize( w, h );
 188 }
 189
 190 //-----------------------------------------------------------------------------
 191 // MyApp
 192 //-----------------------------------------------------------------------------
 193
 194 MyApp::MyApp(void) :
 195   wxApp( )
 196 {
 197 }
 198
 199 bool MyApp::OnInit(void)
 200 {
 201   wxImage::AddHandler( new wxPNGHandler );
 202
 203   wxFrame *frame = new MyFrame();
 204   frame->Show( TRUE );
 205
 206   return TRUE;
 207 }
 208