Fixed Refresh to clip update rectangles to the visible area of a

(scrolled) window. If there are many invisible/partly visible
        rectangles in the update region GTK+-1.2.10 starts complaining
        about bad match errors and soon crashes.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@20966 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/window.cpp

@@ -3627,6 +3627,16 @@ void wxWindowGTK::Refresh( bool eraseBackground, const wxRect *rect )
 #ifndef __WXGTK20__
     if (g_isIdle)
         wxapp_install_idle_handler();
+    wxRect myRect (0, 0, m_wxwindow->allocation.width,
+		   m_wxwindow->allocation.height);
+    
+    if (rect){
+      myRect.Intersect(*rect);
+      if (!myRect.width || !myRect.height)
+	// nothing to do, rectangle is empty
+	return;
+      rect = &myRect;
+    }
 
     if (eraseBackground && m_wxwindow && m_wxwindow->window)
     {

src/gtk1/window.cpp

@@ -3627,6 +3627,16 @@ void wxWindowGTK::Refresh( bool eraseBackground, const wxRect *rect )
 #ifndef __WXGTK20__
     if (g_isIdle)
         wxapp_install_idle_handler();
+    wxRect myRect (0, 0, m_wxwindow->allocation.width,
+		   m_wxwindow->allocation.height);
+    
+    if (rect){
+      myRect.Intersect(*rect);
+      if (!myRect.width || !myRect.height)
+	// nothing to do, rectangle is empty
+	return;
+      rect = &myRect;
+    }
 
     if (eraseBackground && m_wxwindow && m_wxwindow->window)
     {