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 public:
  33     MyCanvas() {};
  34     MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
  35     ~MyCanvas();
  36     void OnPaint( wxPaintEvent &event );
  37
  38     wxBitmap  *my_horse;
  39     wxBitmap  *my_square;
  40
  41     DECLARE_DYNAMIC_CLASS(MyCanvas)
  42     DECLARE_EVENT_TABLE()
  43 };
  44
  45 // MyFrame
  46
  47 class MyFrame: public wxFrame
  48 {
  49 public:
  50     MyFrame();
  51
  52     void OnAbout( wxCommandEvent &event );
  53     void OnQuit( wxCommandEvent &event );
  54
  55     MyCanvas         *m_canvas;
  56
  57     DECLARE_DYNAMIC_CLASS(MyFrame)
  58     DECLARE_EVENT_TABLE()
  59 };
  60
  61 // MyApp
  62
  63 class MyApp: public wxApp
  64 {
  65 public:
  66     virtual bool OnInit();
  67 };
  68
  69 // main program
  70
  71 IMPLEMENT_APP(MyApp)
  72
  73 // MyCanvas
  74
  75 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
  76
  77 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
  78   EVT_PAINT(MyCanvas::OnPaint)
  79 END_EVENT_TABLE()
  80
  81 MyCanvas::MyCanvas( wxWindow *parent, const wxWindowID id,
  82                     const wxPoint &pos, const wxSize &size )
  83         : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
  84 {
  85   SetBackgroundColour(* wxWHITE);
  86
  87   wxBitmap bitmap( 100, 100 );
  88
  89   wxMemoryDC dc;
  90   dc.SelectObject( bitmap );
  91   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
  92   dc.SetPen( *wxWHITE_PEN );
  93   dc.DrawRectangle( 0, 0, 100, 100 );
  94   dc.SelectObject( wxNullBitmap );
  95
  96   wxString dir("");
  97
  98 #ifdef __WXGTK__
  99   dir = wxString("../");
 100 #endif
 101
 102   wxImage image( bitmap );
 103   image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG );
 104
 105   image.LoadFile( dir + wxString("horse.png"), wxBITMAP_TYPE_PNG );
 106   image.SetRGB( 0, 0, 250, 0, 0 );
 107   image.SetRGB( 1, 0, 100, 100, 100 );
 108   image.SetRGB( 2, 0, 250, 250, 250 );
 109   my_horse = new wxBitmap( image.ConvertToBitmap() );
 110
 111   image.LoadFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG );
 112   my_square = new wxBitmap( image.ConvertToBitmap() );
 113 }
 114
 115 MyCanvas::~MyCanvas()
 116 {
 117   delete my_horse;
 118   delete my_square;
 119 }
 120
 121 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 122 {
 123   wxPaintDC dc( this );
 124   PrepareDC( dc );
 125
 126   dc.DrawText( "Loaded image", 30, 100 );
 127   if (my_square->Ok()) dc.DrawBitmap( *my_square, 30, 120 );
 128
 129   dc.DrawText( "Drawn directly", 150, 100 );
 130   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 131   dc.SetPen( *wxWHITE_PEN );
 132   dc.DrawRectangle( 150, 120, 100, 100 );
 133
 134   if (my_horse->Ok()) dc.DrawBitmap( *my_horse, 30, 240 );
 135 }
 136
 137 // MyFrame
 138
 139 const int ID_QUIT  = 108;
 140 const int ID_ABOUT = 109;
 141
 142 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 143
 144 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 145   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 146   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 147 END_EVENT_TABLE()
 148
 149 MyFrame::MyFrame()
 150        : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
 151                   wxPoint(20,20), wxSize(470,360) )
 152 {
 153   wxMenu *file_menu = new wxMenu();
 154   file_menu->Append( ID_ABOUT, "About..");
 155   file_menu->Append( ID_QUIT, "Exit");
 156
 157   wxMenuBar *menu_bar = new wxMenuBar();
 158   menu_bar->Append(file_menu, "File");
 159
 160   SetMenuBar( menu_bar );
 161
 162   CreateStatusBar(2);
 163   int widths[] = { -1, 100 };
 164   SetStatusWidths( 2, widths );
 165
 166   m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
 167   m_canvas->SetScrollbars( 10, 10, 50, 50 );
 168 }
 169
 170 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 171 {
 172   Close( TRUE );
 173 }
 174
 175 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 176 {
 177   (void)wxMessageBox( "wxImage demo\n"
 178                       "Robert Roebling (c) 1998",
 179                       "About wxImage Demo", wxICON_INFORMATION | wxOK );
 180 }
 181
 182 //-----------------------------------------------------------------------------
 183 // MyApp
 184 //-----------------------------------------------------------------------------
 185
 186 bool MyApp::OnInit()
 187 {
 188   wxImage::AddHandler( new wxPNGHandler );
 189
 190   wxFrame *frame = new MyFrame();
 191   frame->Show( TRUE );
 192
 193   return TRUE;
 194 }
 195