Trying to understand wxCanvas.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@8812 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

contrib/samples/canvas/simple/simple.cpp

@@ -0,0 +1,147 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        simple.cpp
+// Author:      XX
+// Created:     XX/XX/XX
+// Copyright:   
+/////////////////////////////////////////////////////////////////////////////
+
+#ifdef __GNUG__
+    #pragma implementation "simple.cpp"
+#endif
+
+// For compilers that support precompilation
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+// Include private headers
+#include "simple.h"
+
+// Include icon header
+#if defined(__WXGTK__) || defined(__WXMOTIF__)
+    #include "mondrian.xpm"
+#endif
+
+// Include image
+#include "smile.xpm"
+    
+// WDR: class implementations
+
+//------------------------------------------------------------------------------
+// MyFrame
+//------------------------------------------------------------------------------
+
+// WDR: event table for MyFrame
+
+BEGIN_EVENT_TABLE(MyFrame,wxFrame)
+    EVT_MENU(ID_QUIT, MyFrame::OnQuit)
+    EVT_CLOSE(MyFrame::OnCloseWindow)
+END_EVENT_TABLE()
+
+MyFrame::MyFrame( wxWindow *parent, wxWindowID id, const wxString &title,
+    const wxPoint &position, const wxSize& size, long style ) :
+    wxFrame( parent, id, title, position, size, style )
+{
+    CreateMyMenuBar();
+    
+    CreateStatusBar(1);
+    SetStatusText( "Welcome!" );
+    
+    SetIcon(wxICON(mondrian));
+
+    // wxCanvas from here
+    
+    m_admin = new wxCanvasAdmin;
+    wxCanvas *canvas = new wxCanvas( m_admin, this, -1 );
+    m_admin->Append( canvas );
+    m_admin->SetActive( canvas );
+    
+
+    wxCanvasObjectGroup *root = new wxCanvasObjectGroup(0,0);
+    root->DeleteContents( TRUE );
+
+    wxCanvasRect *rect;
+    
+    rect = new wxCanvasRect( 120,10,120,140 );
+    rect->SetBrush( *wxRED_BRUSH );
+    root->Append( rect );
+        
+/*
+    wxBitmap bitmap( smile_xpm );
+    wxImage image( bitmap );
+
+    m_smile1 = new wxCanvasImage( image, 0,70,32,32 );
+    root->Append( m_smile1 );
+
+    int i;
+    for (i = 10; i < 300; i+=10)
+    {
+        wxCanvasRect *r = new wxCanvasRect( i,50,3,140 );
+        r->SetBrush( *wxRED_BRUSH );
+        root->Append( r );
+    }
+    
+    m_smile2 = new wxCanvasImage( image, 0,110,32,32 );
+    root->Append( m_smile2 );
+
+    for (i = 15; i < 300; i+=10)
+    {
+        wxCanvasRect *r = new wxCanvasRect( i,50,3,140 );
+        r->SetBrush( *wxRED_BRUSH );
+        root->Append( r );
+    }
+*/
+    
+    canvas->SetRoot( root );
+}
+
+void MyFrame::CreateMyMenuBar()
+{
+    wxMenu *file_menu = new wxMenu;
+    file_menu->Append( ID_QUIT, "Quit...", "Quit program" );
+    
+    wxMenuBar *menu_bar = new wxMenuBar();
+    menu_bar->Append( file_menu, "File" );
+    
+    SetMenuBar( menu_bar );
+}
+
+// WDR: handler implementations for MyFrame
+
+void MyFrame::OnQuit( wxCommandEvent &event )
+{
+     Close( TRUE );
+}
+
+void MyFrame::OnCloseWindow( wxCloseEvent &event )
+{
+    // if ! saved changes -> return
+    
+    Destroy();
+}
+
+//------------------------------------------------------------------------------
+// MyApp
+//------------------------------------------------------------------------------
+
+IMPLEMENT_APP(MyApp)
+
+MyApp::MyApp()
+{
+}
+
+bool MyApp::OnInit()
+{
+    MyFrame *frame = new MyFrame( NULL, -1, "SuperApp", wxPoint(20,20), wxSize(500,340) );
+    frame->Show( TRUE );
+    
+    return TRUE;
+}
+
+int MyApp::OnExit()
+{
+    return 0;
+}
+