Added the forgotten file txtstrm.tex

[wxWidgets.git] / samples / image / image.cpp

diff --git a/samples/image/image.cpp b/samples/image/image.cpp
index c93a84b6a3e08cb899f1dc9f21a06d551ed330da..80d07d6a17e180fcdf8c40edebd8022ffe076327 100644 (file)
--- a/samples/image/image.cpp
+++ b/samples/image/image.cpp
@@ -1,15 +1,27 @@
 /*
  * Program: image
 /*
  * Program: image

- * 
+ *

  * Author: Robert Roebling
  *
  * Copyright: (C) 1998, Robert Roebling
  *
  */
 
  * Author: Robert Roebling
  *
  * Copyright: (C) 1998, Robert Roebling
  *
  */
 

+// For compilers that support precompilation, includes "wx/wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+#pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP

 #include "wx/wx.h"
 #include "wx/wx.h"

+#endif
+

 #include "wx/image.h"
 
 #include "wx/image.h"
 

+#include "wx/file.h"
+

 // derived classes
 
 class MyFrame;
 // derived classes
 
 class MyFrame;


@@ -19,46 +31,46 @@ class MyApp;
 
 class MyCanvas: public wxScrolledWindow
 {
 
 class MyCanvas: public wxScrolledWindow
 {

-  DECLARE_DYNAMIC_CLASS(MyCanvas)
-  
-  public:
-  
-    MyCanvas(void) {};
+public:
+    MyCanvas() {};

     MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
     MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );

-    ~MyCanvas(void);
+    ~MyCanvas();

     void OnPaint( wxPaintEvent &event );
     void OnPaint( wxPaintEvent &event );

-    
-    wxBitmap  *my_horse;
-    
-  DECLARE_EVENT_TABLE()
+    void CreateAntiAliasedBitmap();
+
+    wxBitmap  *my_horse_png;
+    wxBitmap  *my_horse_jpeg;
+    wxBitmap  *my_horse_gif;
+    wxBitmap  *my_horse_bmp;
+    wxBitmap  *my_square;
+    wxBitmap  *my_anti;
+
+    DECLARE_DYNAMIC_CLASS(MyCanvas)
+    DECLARE_EVENT_TABLE()

 };
 
 // MyFrame
 
 class MyFrame: public wxFrame
 {
 };
 
 // MyFrame
 
 class MyFrame: public wxFrame
 {

-  DECLARE_DYNAMIC_CLASS(MyFrame)
+public:
+    MyFrame();

 
 

-  public:
-  
-    MyFrame(void);
-    void OnSize( wxSizeEvent &event );

     void OnAbout( wxCommandEvent &event );
     void OnQuit( wxCommandEvent &event );
     void OnAbout( wxCommandEvent &event );
     void OnQuit( wxCommandEvent &event );

-    
+

     MyCanvas         *m_canvas;
     MyCanvas         *m_canvas;

-    
-  DECLARE_EVENT_TABLE()
+
+    DECLARE_DYNAMIC_CLASS(MyFrame)
+    DECLARE_EVENT_TABLE()

 };
 
 // MyApp
 
 class MyApp: public wxApp
 {
 };
 
 // MyApp
 
 class MyApp: public wxApp
 {

-  public:
-  
-    MyApp(void);
-    virtual bool OnInit(void);
+public:
+    virtual bool OnInit();

 };
 
 // main program
 };
 
 // main program


@@ -69,34 +81,79 @@ IMPLEMENT_APP(MyApp)
 
 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
 
 
 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
 

-BEGIN_EVENT_TABLE(MyCanvas,wxScrolledWindow)
-  EVT_PAINT  (MyCanvas::OnPaint)
+BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
+  EVT_PAINT(MyCanvas::OnPaint)

 END_EVENT_TABLE()
 
 END_EVENT_TABLE()
 

-MyCanvas::MyCanvas( wxWindow *parent, const wxWindowID id, const wxPoint &pos, const wxSize &size ) 
-  : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER ) 
+MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
+                    const wxPoint &pos, const wxSize &size )
+        : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )

 {
 {

-  wxImage image;
+  my_horse_png = (wxBitmap*) NULL;
+  my_horse_jpeg = (wxBitmap*) NULL;
+  my_horse_gif = (wxBitmap*) NULL;
+  my_horse_bmp = (wxBitmap*) NULL;
+  my_square = (wxBitmap*) NULL;
+  my_anti = (wxBitmap*) NULL;
+
+  SetBackgroundColour(* wxWHITE);

 
   wxBitmap bitmap( 100, 100 );
 
   wxBitmap bitmap( 100, 100 );

-  
+

   wxMemoryDC dc;
   dc.SelectObject( bitmap );
   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
   wxMemoryDC dc;
   dc.SelectObject( bitmap );
   dc.SetBrush( wxBrush( "orange", wxSOLID ) );

-  dc.SetPen( *wxTRANSPARENT_PEN );
+  dc.SetPen( *wxWHITE_PEN );

   dc.DrawRectangle( 0, 0, 100, 100 );
   dc.SelectObject( wxNullBitmap );
   dc.DrawRectangle( 0, 0, 100, 100 );
   dc.SelectObject( wxNullBitmap );

+
+  // try to find the directory with our images
+  wxString dir;
+  if ( wxFile::Exists("./horse.png") )
+      dir = "./";
+  else if ( wxFile::Exists("../horse.png") )
+      dir = "../";
+  else
+      wxLogWarning("Can't find image files in either '.' or '..'!");
+
+  wxImage image( bitmap );
+  if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG ) )
+      wxLogError("Can't save file");
+  
+  if ( !image.LoadFile( dir + wxString("horse.png"), wxBITMAP_TYPE_PNG ) )
+      wxLogError("Can't load PNG image");
+  else
+    my_horse_png = new wxBitmap( image.ConvertToBitmap() );

   
   

-  image = bitmap.ConvertToImage();
-  image.SaveFile( "../test.png", wxBITMAP_TYPE_PNG );
+  if ( !image.LoadFile( dir + wxString("horse.jpg"), wxBITMAP_TYPE_JPEG ) )
+      wxLogError("Can't load JPG image");
+  else
+      my_horse_jpeg = new wxBitmap( image.ConvertToBitmap() );

   
   

-  image.LoadFile( "../test.png", wxBITMAP_TYPE_PNG );
-  my_horse = new wxBitmap( image );
+  if ( !image.LoadFile( dir + wxString("horse.gif"), wxBITMAP_TYPE_GIF ) )
+      wxLogError("Can't load GIF image");
+  else
+    my_horse_gif = new wxBitmap( image.ConvertToBitmap() );
+  
+  if ( !image.LoadFile( dir + wxString("horse.bmp"), wxBITMAP_TYPE_BMP ) )
+      wxLogError("Can't load BMP image");
+  else
+    my_horse_bmp = new wxBitmap( image.ConvertToBitmap() );
+  
+  image.LoadFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG );
+  my_square = new wxBitmap( image.ConvertToBitmap() );
+  
+  CreateAntiAliasedBitmap();

 }
 
 }
 

-MyCanvas::~MyCanvas(void)
+MyCanvas::~MyCanvas()

 {
 {

-  delete my_horse;
+  delete my_horse_png;
+  delete my_horse_jpeg;
+  delete my_horse_gif;
+  delete my_horse_bmp;
+  delete my_square;
+  delete my_anti;

 }
 
 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 }
 
 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )


@@ -104,19 +161,82 @@ void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
   wxPaintDC dc( this );
   PrepareDC( dc );
 
   wxPaintDC dc( this );
   PrepareDC( dc );
 

-  dc.DrawText( "Loaded image", 30, 100 );
-  if (my_horse->Ok()) dc.DrawBitmap( *my_horse, 30, 120 );
+  dc.DrawText( "Loaded image", 30, 10 );
+  if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );

   
   

-  dc.DrawText( "Drawn directly", 150, 100 );
+  dc.DrawText( "Drawn directly", 150, 10 );

   dc.SetBrush( wxBrush( "orange", wxSOLID ) );
   dc.SetBrush( wxBrush( "orange", wxSOLID ) );

+  dc.SetPen( *wxWHITE_PEN );
+  dc.DrawRectangle( 150, 30, 100, 100 );
+
+  if (my_anti && my_anti->Ok()) dc.DrawBitmap( *my_anti, 250, 140 );
+  
+  dc.DrawText( "PNG handler", 30, 135 );
+  if (my_horse_png && my_horse_png->Ok()) dc.DrawBitmap( *my_horse_png, 30, 150 );
+  
+  dc.DrawText( "JPEG handler", 30, 365 );
+  if (my_horse_jpeg && my_horse_jpeg->Ok()) dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
+  
+  dc.DrawText( "GIF handler", 30, 595 );
+  if (my_horse_gif && my_horse_gif->Ok()) dc.DrawBitmap( *my_horse_gif, 30, 610 );
+  
+  dc.DrawText( "BMP handler", 30, 815 );
+  if (my_horse_bmp && my_horse_bmp->Ok()) dc.DrawBitmap( *my_horse_bmp, 30, 830 );
+}
+
+void MyCanvas::CreateAntiAliasedBitmap()
+{
+  wxBitmap bitmap( 300, 300 );
+
+  wxMemoryDC dc;
+
+  dc.SelectObject( bitmap );
+
+  dc.Clear();
+  
+  dc.SetFont( wxFont( 24, wxDECORATIVE, wxDEFAULT, wxDEFAULT ) );
+  dc.SetTextForeground( "RED" );
+  dc.DrawText( "This is anti-aliased Text.", 20, 20 );
+  dc.DrawText( "And a Rectangle.", 20, 60 );
+  
+  dc.SetBrush( *wxRED_BRUSH );

   dc.SetPen( *wxTRANSPARENT_PEN );
   dc.SetPen( *wxTRANSPARENT_PEN );

-  dc.DrawRectangle( 150, 120, 100, 100 );
+  dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
+  
+  wxImage original( bitmap );
+  wxImage anti( 150, 150 );
+
+  /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
+  
+  for (int y = 1; y < 149; y++)
+    for (int x = 1; x < 149; x++)
+    {
+       int red = original.GetRed( x*2, y*2 ) +
+                 original.GetRed( x*2-1, y*2 ) + 
+                 original.GetRed( x*2, y*2+1 ) + 
+                 original.GetRed( x*2+1, y*2+1 );
+       red = red/4; 
+       
+       int green = original.GetGreen( x*2, y*2 ) +
+                   original.GetGreen( x*2-1, y*2 ) + 
+                   original.GetGreen( x*2, y*2+1 ) + 
+                   original.GetGreen( x*2+1, y*2+1 );
+       green = green/4; 
+       
+       int blue = original.GetBlue( x*2, y*2 ) +
+                  original.GetBlue( x*2-1, y*2 ) + 
+                  original.GetBlue( x*2, y*2+1 ) + 
+                  original.GetBlue( x*2+1, y*2+1 );
+       blue = blue/4; 
+       anti.SetRGB( x, y, red, green, blue );
+    }
+  my_anti = new wxBitmap( anti.ConvertToBitmap() );

 }
 
 // MyFrame
 
 }
 
 // MyFrame
 

-const  ID_QUIT  = 108;
-const  ID_ABOUT = 109;
+const int ID_QUIT  = 108;
+const int ID_ABOUT = 109;

 
 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 
 
 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 


@@ -125,21 +245,25 @@ BEGIN_EVENT_TABLE(MyFrame,wxFrame)
   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 END_EVENT_TABLE()
 
   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 END_EVENT_TABLE()
 

-MyFrame::MyFrame(void) :
-  wxFrame( (wxFrame *) NULL, -1, "wxImage sample", wxPoint(20,20), wxSize(470,360) )
+MyFrame::MyFrame()
+       : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
+                  wxPoint(20,20), wxSize(470,360) )

 {
   wxMenu *file_menu = new wxMenu();
 {
   wxMenu *file_menu = new wxMenu();

-  file_menu->Append( ID_ABOUT, "About..");
-  file_menu->Append( ID_QUIT, "Exit");
-  
+  file_menu->Append( ID_ABOUT, "&About..");
+  file_menu->Append( ID_QUIT, "E&xit");
+

   wxMenuBar *menu_bar = new wxMenuBar();
   wxMenuBar *menu_bar = new wxMenuBar();

-  menu_bar->Append(file_menu, "File");
-  menu_bar->Show( TRUE );
-  
+  menu_bar->Append(file_menu, "&File");
+

   SetMenuBar( menu_bar );
   SetMenuBar( menu_bar );

-  
-  m_canvas = new MyCanvas( this, -1, wxPoint(2,62), wxSize(300-4,120-4) );
-  m_canvas->SetScrollbars( 10, 10, 50, 50 );
+
+  CreateStatusBar(2);
+  int widths[] = { -1, 100 };
+  SetStatusWidths( 2, widths );
+
+  m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
+  m_canvas->SetScrollbars( 10, 10, 50, 100 );

 }
 
 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 }
 
 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )


@@ -149,29 +273,30 @@ void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 
 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 {
 
 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 {

-  (void) wxMessageBox( "wxImage demo\nRobert Roebling (c) 1998", "About wxImage Demo", wxOK );
+  (void)wxMessageBox( "wxImage demo\n"
+                      "Robert Roebling (c) 1998",
+                      "About wxImage Demo", wxICON_INFORMATION | wxOK );

 }
 
 //-----------------------------------------------------------------------------
 // MyApp
 //-----------------------------------------------------------------------------
 
 }
 
 //-----------------------------------------------------------------------------
 // MyApp
 //-----------------------------------------------------------------------------
 

-MyApp::MyApp(void) : 
-  wxApp( )
-{
-}
-
-bool MyApp::OnInit(void)
+bool MyApp::OnInit()

 {
 {

+#if wxUSE_LIBPNG

   wxImage::AddHandler( new wxPNGHandler );
   wxImage::AddHandler( new wxPNGHandler );

-  
-  wxFrame *frame = new MyFrame();
-  frame->Show( TRUE );
-  
-  return TRUE;
-}
+#endif

 
 

+#if wxUSE_LIBJPEG
+  wxImage::AddHandler( new wxJPEGHandler );
+#endif

 
 

+  wxImage::AddHandler( new wxGIFHandler );

 
 

+  wxFrame *frame = new MyFrame();
+  frame->Show( TRUE );

 
 

+  return TRUE;
+}