Added more wxRegion tests to erase sample.

Implemented "clear now, paint later".
  Corrected colour-by-name lookup.
  Corrected DrawRectangle code which produced
    redraw garbage under wxX11.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14297 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/x11/window.h

@@ -120,8 +120,11 @@ public:
     // arrange status bar, toolbar etc.
     virtual bool PreResize();
     
-    // Generates paint events
-    void X11SendPaintEvents();
+    // Generates paint events from m_updateRegion
+    void SendPaintEvents();
+    
+    // Generates erase events from m_clearRegion
+    void SendEraseEvents();
     
     // Clip to paint region?
     bool GetClipPaintRegion() { return m_clipPaintRegion; }