Applied patch [ 668155 ] Refresh problem when msgbox is shown

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18904 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/univ/winuniv.cpp

@@ -391,6 +391,19 @@ void wxWindow::Refresh(bool eraseBackground, const wxRect *rectClient)
 #endif // WXDEBUG_REFRESH
 
     wxWindowNative::Refresh(eraseBackground, &rectWin);
+
+    // Refresh all sub controls if any.
+    wxWindowList::Node *node = GetChildren().GetFirst();
+    while ( node )
+    {
+        wxWindow *win = node->GetData();
+        // Only refresh sub controls when it is visible 
+        // and when it is in the update region.
+        if(win->IsShown() && wxRegion(rectWin).Contains(win->GetRect()) != wxOutRegion)
+            win->Refresh(eraseBackground, &rectWin);
+            
+        node = node->GetNext();
+    }
 }
 
 // ----------------------------------------------------------------------------