use wxDC::GetMultiLineTextExtent() instead of duplicating its code in wxButton::DoGet...

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

diff --git a/samples/png/pngdemo.cpp b/samples/png/pngdemo.cpp
index 0106b34ed951dda758dc08f9f8323cbfdebbd749..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:      $Id$
 // 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__
 /////////////////////////////////////////////////////////////////////////////
 
 #ifdef __GNUG__


@@ -20,45 +20,40 @@
 #pragma hdrstop
 #endif
 
 #pragma hdrstop
 #endif
 

-#ifdef __WINDOWS__
-#include <wx/pnghand.h>
-#endif
+#include "wx/image.h"

 
 #include "pngdemo.h"
 
 
 #include "pngdemo.h"
 

-MyFrame   *frame = NULL;
-wxBitmap  *g_TestBitmap = NULL;
+MyFrame   *frame = (MyFrame *) NULL;
+wxBitmap  *g_TestBitmap = (wxBitmap *) NULL;

 
 IMPLEMENT_APP(MyApp)
 
 
 IMPLEMENT_APP(MyApp)
 

-MyApp::MyApp()
-{
-}
-

 bool MyApp::OnInit(void)
 {
 bool MyApp::OnInit(void)
 {

-#ifdef __WINDOWS__
-  wxBitmap::AddHandler(new wxPNGFileHandler);
-#endif
+  wxImage::AddHandler(new wxPNGHandler);

 
   // Create the main frame window
 
   // Create the main frame window

-  frame = new MyFrame(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);
   // Give it a status line
   frame->CreateStatusBar(2);

+#endif // wxUSE_STATUSBAR

 
   // Make a menubar
   wxMenu *file_menu = new wxMenu;
   wxMenu *help_menu = new wxMenu;
 
 
   // 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_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;
 
 
   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);
 
   // Associate the menu bar with the frame
   frame->SetMenuBar(menu_bar);


@@ -69,53 +64,96 @@ bool MyApp::OnInit(void)
 //  canvas->SetScrollbars(20, 20, 50, 50, 4, 4);
   frame->canvas = canvas;
 
 //  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)
     EVT_MENU(PNGDEMO_QUIT,      MyFrame::OnQuit)
     EVT_MENU(PNGDEMO_ABOUT,     MyFrame::OnAbout)
     EVT_MENU(PNGDEMO_LOAD_FILE, MyFrame::OnLoadFile)
 }
 
 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
 MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size):
 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()

 {
 {

-  canvas = NULL;
+    if (g_TestBitmap)
+    {
+        delete g_TestBitmap;
+        g_TestBitmap = (wxBitmap *) NULL;
+    }

 }
 
 }
 

-void MyFrame::OnQuit(wxCommandEvent& event)
+void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))

 {
 {

-    Close(TRUE);
+    Close(true);

 }
 
 }
 

-void MyFrame::OnAbout(wxCommandEvent& event)
+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::OnLoadFile(wxCommandEvent& event)
+void MyFrame::OnSaveFile(wxCommandEvent& WXUNUSED(event))

 {
 {

-       // Show file selector.
-       char *f = wxFileSelector("Open Image", NULL, 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;
+
+  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( _T("This is a memory dc."), 10, 10 );

 
 

-       if (!f)
-         return;
+  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(wxT("Open Image"), (const wxChar *) NULL,
+                                    (const wxChar *) NULL, wxT("png"),
+                                    wxT("PNG files (*.png)|*.png"));
+
+    if (f == _T(""))
+        return;

 
     if ( g_TestBitmap )
         delete g_TestBitmap;
 
     if ( g_TestBitmap )
         delete g_TestBitmap;

+

     g_TestBitmap = new wxBitmap(f, wxBITMAP_TYPE_PNG);
     if (!g_TestBitmap->Ok())
     {
         delete g_TestBitmap;
     g_TestBitmap = new wxBitmap(f, wxBITMAP_TYPE_PNG);
     if (!g_TestBitmap->Ok())
     {
         delete g_TestBitmap;

-        g_TestBitmap = NULL;
+        g_TestBitmap = (wxBitmap *) NULL;

     }
 
     canvas->Refresh();
     }
 
     canvas->Refresh();


@@ -127,19 +165,15 @@ END_EVENT_TABLE()
 
 // Define a constructor for my canvas
 MyCanvas::MyCanvas(wxWindow *parent, const wxPoint& pos, const wxSize& size):
 
 // 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)

 {
 }
 
 // Define the repainting behaviour
 {
 }
 
 // Define the repainting behaviour

-void MyCanvas::OnPaint(wxPaintEvent& event)
+void MyCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))

 {
   wxPaintDC dc(this);
 {
   wxPaintDC dc(this);

-  dc.SetPen(wxRED_PEN);
+  dc.SetPen(* wxRED_PEN);

 
   int i;
   for ( i = 0; i < 500; i += 10)
 
   int i;
   for ( i = 0; i < 500; i += 10)


@@ -149,38 +183,30 @@ void MyCanvas::OnPaint(wxPaintEvent& event)
   if ( g_TestBitmap && g_TestBitmap->Ok() )
   {
     wxMemoryDC memDC;
   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
 
     // 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(NULL);
+    memDC.SelectObject(wxNullBitmap);

   }
 
   if ( g_TestBitmap && g_TestBitmap->Ok() )
   {
     wxMemoryDC memDC;
   }
 
   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,
 
     // 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(NULL);
+    memDC.SelectObject(wxNullBitmap);

   }
 }
 
   }
 }
 

-// Define the behaviour for the frame closing
-// - must delete all frames except for the main one.
-bool MyFrame::OnClose(void)
-{
-  Show(FALSE);
-
-  return TRUE;
-}