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