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

diff --git a/samples/png/pngdemo.cpp b/samples/png/pngdemo.cpp
index 520bb10fd10b2e3f7f883998647543259a42c1dc..5ae070ba07bdb682c2e8650565820252ce50bd60 100644 (file)
--- a/samples/png/pngdemo.cpp
+++ b/samples/png/pngdemo.cpp
@@ -5,8 +5,8 @@
 // Modified by:
 // Created:     04/01/98
 // RCS-ID:      $Id$
-// Copyright:   (c) Julian Smart and Markus Holzem
-// Licence:    wxWindows license
+// Copyright:   (c) Julian Smart
+// Licence:     wxWindows license
 /////////////////////////////////////////////////////////////////////////////
 
 #ifdef __GNUG__
@@ -20,12 +20,7 @@
 #pragma hdrstop
 #endif
 
-#ifdef __WXMSW__
-#include "wx/pnghand.h"
-#endif
-#ifdef __WXGTK__
 #include "wx/image.h"
-#endif
 
 #include "pngdemo.h"
 
@@ -34,33 +29,31 @@ wxBitmap  *g_TestBitmap = (wxBitmap *) NULL;
 
 IMPLEMENT_APP(MyApp)
 
-MyApp::MyApp()
-{
-}
-
 bool MyApp::OnInit(void)
 {
   wxImage::AddHandler(new wxPNGHandler);
 
   // Create the main frame window
-  frame = new MyFrame((wxFrame *) NULL, "wxPNGBitmap Demo", wxPoint(0, 0), wxSize(300, 300));
+  frame = new MyFrame((wxFrame *) NULL, _T("wxPNGBitmap Demo"), wxPoint(0, 0), wxSize(300, 300));
 
+#if wxUSE_STATUSBAR
   // Give it a status line
   frame->CreateStatusBar(2);
+#endif // wxUSE_STATUSBAR
 
   // Make a menubar
   wxMenu *file_menu = new wxMenu;
   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");
+  file_menu->Append(PNGDEMO_LOAD_FILE, _T("&Load file"),                _T("Load file"));
+  file_menu->Append(PNGDEMO_SAVE_FILE, _T("&Save file"),                _T("Save file"));
+  file_menu->Append(PNGDEMO_QUIT, _T("E&xit"),                _T("Quit program"));
+  help_menu->Append(PNGDEMO_ABOUT, _T("&About"),              _T("About PNG demo"));
 
   wxMenuBar *menu_bar = new wxMenuBar;
 
-  menu_bar->Append(file_menu, "&File");
-  menu_bar->Append(help_menu, "&Help");
+  menu_bar->Append(file_menu, _T("&File"));
+  menu_bar->Append(help_menu, _T("&Help"));
 
   // Associate the menu bar with the frame
   frame->SetMenuBar(menu_bar);
@@ -71,11 +64,13 @@ bool MyApp::OnInit(void)
 //  canvas->SetScrollbars(20, 20, 50, 50, 4, 4);
   frame->canvas = canvas;
 
-  frame->Show(TRUE);
+  frame->Show(true);
 
-  frame->SetStatusText("Hello, wxWindows");
+#if wxUSE_STATUSBAR
+  frame->SetStatusText(_T("Hello, wxWidgets"));
+#endif // wxUSE_STATUSBAR
 
-  return TRUE;
+  return true;
 }
 
 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
@@ -87,31 +82,42 @@ END_EVENT_TABLE()
 
 // Define my frame constructor
 MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size):
-  wxFrame(frame, -1, title, pos, size)
+  wxFrame(frame, wxID_ANY, title, pos, size)
 {
   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);
+    Close(true);
 }
 
 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 {
-    (void)wxMessageBox("PNG demo\nJulian Smart (c) 1998",
-            "About PNG Demo", wxOK);
+    (void)wxMessageBox(_T("PNG demo\nJulian Smart (c) 1998"),
+            _T("About PNG Demo"), wxOK);
 }
 
 void MyFrame::OnSaveFile(wxCommandEvent& WXUNUSED(event))
 {
-  wxString f = wxFileSelector( "Save Image", (const char *)NULL, (const char *)NULL,
-                            "png", "PNG files (*.png)|*.png" );
+  wxString f = wxFileSelector( wxT("Save Image"), (const wxChar *)NULL,
+                               (const wxChar *)NULL,
+                               wxT("png"), wxT("PNG files (*.png)|*.png") );
+
+  if (f == _T(""))  return;
 
-  if (f == "")  return;
-  
   wxBitmap *backstore = new wxBitmap( 150, 150 );
-  
+
   wxMemoryDC memDC;
   memDC.SelectObject( *backstore );
   memDC.Clear();
@@ -121,26 +127,28 @@ void MyFrame::OnSaveFile(wxCommandEvent& WXUNUSED(event))
   memDC.SetPen( *wxBLACK_PEN );
   memDC.DrawLine( 0, 0, 0, 10 );
   memDC.SetTextForeground( *wxWHITE );
-  memDC.DrawText( "This is a memory dc.", 10, 10 );
-  
+  memDC.DrawText( _T("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.
-       wxString 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 == _T(""))
+        return;
 
     if ( g_TestBitmap )
         delete g_TestBitmap;
+
     g_TestBitmap = new wxBitmap(f, wxBITMAP_TYPE_PNG);
     if (!g_TestBitmap->Ok())
     {
@@ -157,11 +165,7 @@ END_EVENT_TABLE()
 
 // Define a constructor for my canvas
 MyCanvas::MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size):
- wxScrolledWindow(parent, -1, pos, size)
-{
-}
-
-MyCanvas::~MyCanvas(void)
+ wxScrolledWindow(parent, wxID_ANY, pos, size)
 {
 }
 
@@ -187,7 +191,7 @@ void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
     memDC.SelectObject(* g_TestBitmap);
 
     // Normal, non-transparent blitting
-    dc.Blit(20, 20, g_TestBitmap->GetWidth(), g_TestBitmap->GetHeight(), & memDC, 0, 0, wxCOPY, FALSE);
+    dc.Blit(20, 20, g_TestBitmap->GetWidth(), g_TestBitmap->GetHeight(), & memDC, 0, 0, wxCOPY, false);
 
     memDC.SelectObject(wxNullBitmap);
   }
@@ -199,7 +203,7 @@ void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
 
     // 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,
-      0, 0, wxCOPY, TRUE);
+      0, 0, wxCOPY, true);
 
     memDC.SelectObject(wxNullBitmap);
   }