made operator==() and \!=() const (still doesn't make them correct probably)

[wxWidgets.git] / samples / png / pngdemo.cpp

diff --git a/samples/png/pngdemo.cpp b/samples/png/pngdemo.cpp
index edbaea70a2c0c2235451dd38642e90df966a7dd9..186d3c90ac752fb56b46f8b81388c82c692307da 100644 (file)
--- a/samples/png/pngdemo.cpp
+++ b/samples/png/pngdemo.cpp
@@ -6,7 +6,7 @@
 // Created:     04/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Julian Smart and Markus Holzem
-// Licence:    wxWindows license
+// Licence:     wxWindows license
 /////////////////////////////////////////////////////////////////////////////
 
 #ifdef __GNUG__
@@ -20,9 +20,7 @@
 #pragma hdrstop
 #endif
 
-#ifdef __WXMSW__
-#include <wx/pnghand.h>
-#endif
+#include "wx/image.h"
 
 #include "pngdemo.h"
 
@@ -37,9 +35,7 @@ MyApp::MyApp()
 
 bool MyApp::OnInit(void)
 {
-#ifdef __WXMSW__
-  wxBitmap::AddHandler(new wxPNGFileHandler);
-#endif
+  wxImage::AddHandler(new wxPNGHandler);
 
   // Create the main frame window
   frame = new MyFrame((wxFrame *) NULL, "wxPNGBitmap Demo", wxPoint(0, 0), wxSize(300, 300));
@@ -52,6 +48,7 @@ bool MyApp::OnInit(void)
   wxMenu *help_menu = new wxMenu;
 
   file_menu->Append(PNGDEMO_LOAD_FILE, "&Load file",                "Load file");
+  file_menu->Append(PNGDEMO_SAVE_FILE, "&Save file",                "Save file");
   file_menu->Append(PNGDEMO_QUIT, "E&xit",                "Quit program");
   help_menu->Append(PNGDEMO_ABOUT, "&About",              "About PNG demo");
 
@@ -80,6 +77,7 @@ BEGIN_EVENT_TABLE(MyFrame, wxFrame)
     EVT_MENU(PNGDEMO_QUIT,      MyFrame::OnQuit)
     EVT_MENU(PNGDEMO_ABOUT,     MyFrame::OnAbout)
     EVT_MENU(PNGDEMO_LOAD_FILE, MyFrame::OnLoadFile)
+    EVT_MENU(PNGDEMO_SAVE_FILE, MyFrame::OnSaveFile)
 END_EVENT_TABLE()
 
 // Define my frame constructor
@@ -89,6 +87,16 @@ MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos, cons
   canvas = (MyCanvas *) NULL;
 }
 
+// frame destructor
+MyFrame::~MyFrame()
+{
+    if (g_TestBitmap)
+    {
+        delete g_TestBitmap;
+        g_TestBitmap = (wxBitmap *) NULL;
+    }
+}
+
 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 {
     Close(TRUE);
@@ -100,17 +108,47 @@ void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
             "About PNG Demo", wxOK);
 }
 
+void MyFrame::OnSaveFile(wxCommandEvent& WXUNUSED(event))
+{
+  wxString f = wxFileSelector( wxT("Save Image"), (const wxChar *)NULL,
+                               (const wxChar *)NULL,
+                               wxT("png"), wxT("PNG files (*.png)|*.png") );
+
+  if (f == "")  return;
+  
+  wxBitmap *backstore = new wxBitmap( 150, 150 );
+  
+  wxMemoryDC memDC;
+  memDC.SelectObject( *backstore );
+  memDC.Clear();
+  memDC.SetBrush( *wxBLACK_BRUSH );
+  memDC.SetPen( *wxWHITE_PEN );
+  memDC.DrawRectangle( 0, 0, 150, 150 );
+  memDC.SetPen( *wxBLACK_PEN );
+  memDC.DrawLine( 0, 0, 0, 10 );
+  memDC.SetTextForeground( *wxWHITE );
+  memDC.DrawText( "This is a memory dc.", 10, 10 );
+  
+  memDC.SelectObject( wxNullBitmap );
+  
+  backstore->SaveFile( f, wxBITMAP_TYPE_PNG, (wxPalette*)NULL );
+  
+  delete backstore;
+}
+
 void MyFrame::OnLoadFile(wxCommandEvent& WXUNUSED(event))
 {
-       // Show file selector.
-       char *f = wxFileSelector("Open Image", (const char *) NULL, (const char *) NULL,"png",
-                 "PNG files (*.png)|*.png");
+    // Show file selector.
+    wxString f = wxFileSelector(wxT("Open Image"), (const wxChar *) NULL,
+                                    (const wxChar *) NULL, wxT("png"),
+                                    wxT("PNG files (*.png)|*.png"));
 
-       if (!f)
-         return;
+    if (f == "")
+        return;
 
     if ( g_TestBitmap )
         delete g_TestBitmap;
+
     g_TestBitmap = new wxBitmap(f, wxBITMAP_TYPE_PNG);
     if (!g_TestBitmap->Ok())
     {
@@ -139,7 +177,7 @@ MyCanvas::~MyCanvas(void)
 void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
 {
   wxPaintDC dc(this);
-  dc.SetPen(wxRED_PEN);
+  dc.SetPen(* wxRED_PEN);
 
   int i;
   for ( i = 0; i < 500; i += 10)
@@ -149,12 +187,12 @@ void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
   if ( g_TestBitmap && g_TestBitmap->Ok() )
   {
     wxMemoryDC memDC;
-    if ( g_TestBitmap->GetColourMap() )
+    if ( g_TestBitmap->GetPalette() )
     {
-        memDC.SetColourMap(g_TestBitmap->GetColourMap());
-        dc.SetColourMap(g_TestBitmap->GetColourMap());
+        memDC.SetPalette(* g_TestBitmap->GetPalette());
+        dc.SetPalette(* g_TestBitmap->GetPalette());
     }
-    memDC.SelectObject(g_TestBitmap);
+    memDC.SelectObject(* g_TestBitmap);
 
     // Normal, non-transparent blitting
     dc.Blit(20, 20, g_TestBitmap->GetWidth(), g_TestBitmap->GetHeight(), & memDC, 0, 0, wxCOPY, FALSE);
@@ -165,7 +203,7 @@ void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
   if ( g_TestBitmap && g_TestBitmap->Ok() )
   {
     wxMemoryDC memDC;
-    memDC.SelectObject(g_TestBitmap);
+    memDC.SelectObject(* g_TestBitmap);
 
     // Transparent blitting if there's a mask in the bitmap
     dc.Blit(20 + g_TestBitmap->GetWidth() + 20, 20, g_TestBitmap->GetWidth(), g_TestBitmap->GetHeight(), & memDC,
@@ -175,12 +213,4 @@ void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
   }
 }
 
-// Define the behaviour for the frame closing
-// - must delete all frames except for the main one.
-bool MyFrame::OnClose(void)
-{
-  Show(FALSE);
-
-  return TRUE;
-}