Applied wxImage::Scale() patch,

Added testing code for wxSplitterWindow bug.
  Added testing code for OnEraseBackground things.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10542 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/erase/erase.cpp

@@ -0,0 +1,192 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        erase.cpp
+// Purpose:     Erase wxWindows sample
+// Author:      Robert Roebling
+// Modified by:
+// Created:     04/01/98
+// RCS-ID:      $Id$
+// Copyright:   (c) Robert Roebling
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#ifdef __GNUG__
+    #pragma implementation "minimal.cpp"
+    #pragma interface "minimal.cpp"
+#endif
+
+// For compilers that support precompilation, includes "wx/wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+// for all others, include the necessary headers (this file is usually all you
+// need because it includes almost all "standard" wxWindows headers)
+#ifndef WX_PRECOMP
+    #include "wx/wx.h"
+#endif
+
+// ----------------------------------------------------------------------------
+// resources
+// ----------------------------------------------------------------------------
+// the application icon
+#if defined(__WXGTK__) || defined(__WXMOTIF__)
+    #include "mondrian.xpm"
+#endif
+
+// ----------------------------------------------------------------------------
+// private classes
+// ----------------------------------------------------------------------------
+
+class MyApp : public wxApp
+{
+public:
+    virtual bool OnInit();
+};
+
+
+class MyFrame : public wxFrame
+{
+public:
+    MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
+
+    void OnQuit(wxCommandEvent& event);
+    void OnAbout(wxCommandEvent& event);
+
+private:
+    DECLARE_EVENT_TABLE()
+};
+
+
+class MyCanvas : public wxScrolledWindow
+{
+public:
+    MyCanvas( MyFrame *parent );
+    
+    void OnPaint( wxPaintEvent &event );
+    void OnEraseBackground( wxEraseEvent &event );
+
+private:
+    DECLARE_EVENT_TABLE()
+};
+
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------
+
+enum
+{
+    // menu items
+    Minimal_Quit = 1,
+    Minimal_About
+};
+
+
+// ----------------------------------------------------------------------------
+// the application class
+// ----------------------------------------------------------------------------
+
+IMPLEMENT_APP(MyApp)
+
+bool MyApp::OnInit()
+{
+    MyFrame *frame = new MyFrame("Minimal wxWindows App",
+                                 wxPoint(50, 50), wxSize(450, 340));
+
+    frame->Show(TRUE);
+    
+    return TRUE;
+}
+
+// ----------------------------------------------------------------------------
+// main frame
+// ----------------------------------------------------------------------------
+
+BEGIN_EVENT_TABLE(MyFrame, wxFrame)
+    EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
+    EVT_MENU(Minimal_About, MyFrame::OnAbout)
+END_EVENT_TABLE()
+
+// frame constructor
+MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
+       : wxFrame((wxFrame *)NULL, -1, title, pos, size)
+{
+#ifdef __WXMAC__
+    wxApp::s_macAboutMenuItemId = Minimal_About;
+#endif
+
+    SetIcon(wxICON(mondrian));
+
+    wxMenu *menuFile = new wxMenu("", wxMENU_TEAROFF);
+
+    wxMenu *helpMenu = new wxMenu;
+    helpMenu->Append(Minimal_About, "&About...\tCtrl-A", "Show about dialog");
+
+    menuFile->Append(Minimal_Quit, "E&xit\tAlt-X", "Quit this program");
+
+    wxMenuBar *menuBar = new wxMenuBar();
+    menuBar->Append(menuFile, "&File");
+    menuBar->Append(helpMenu, "&Help");
+
+    SetMenuBar(menuBar);
+
+#if wxUSE_STATUSBAR
+    // create a status bar just for fun (by default with 1 pane only)
+    CreateStatusBar(2);
+    SetStatusText("Welcome to wxWindows!");
+#endif // wxUSE_STATUSBAR
+
+    (void)new MyCanvas( this );
+}
+
+
+void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
+{
+    Close(TRUE);
+}
+
+void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
+{
+    wxString msg;
+    msg.Printf( _T("This is the about dialog of minimal sample.\n")
+                _T("Welcome to %s"), wxVERSION_STRING);
+
+    wxMessageBox(msg, "About Minimal", wxOK | wxICON_INFORMATION, this);
+}
+
+
+BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
+    EVT_PAINT(  MyCanvas::OnPaint)
+    EVT_ERASE_BACKGROUND(  MyCanvas::OnEraseBackground)
+END_EVENT_TABLE()
+
+MyCanvas::MyCanvas( MyFrame *parent )
+ : wxScrolledWindow( parent, -1, wxDefaultPosition, wxDefaultSize, 
+                    wxScrolledWindowStyle|wxNO_FULL_REPAINT_ON_RESIZE )
+{
+    SetScrollbars( 10, 10, 40, 100, 0, 0 );
+}
+
+void MyCanvas::OnPaint( wxPaintEvent &event )
+{
+    wxPaintDC dc(this);
+    PrepareDC( dc );
+    
+    dc.SetBrush( *wxRED_BRUSH );
+    dc.DrawRectangle( 100, 100, 300, 500 );
+}
+
+void MyCanvas::OnEraseBackground( wxEraseEvent &event )
+{
+    event.Skip( TRUE );
+}
+