backported: when a window inside scrolled window receives focus, make sure the parent is scrolled so that the window with focus is visible

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@50864 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/scrolwin.h

@@ -163,6 +163,10 @@ public:
     void HandleOnMouseWheel(wxMouseEvent& event);
 #endif // wxUSE_MOUSEWHEEL
 
+#if wxABI_VERSION >= 20808
+    void HandleOnChildFocus(wxChildFocusEvent& event);
+#endif
+
     // FIXME: this is needed for now for wxPlot compilation, should be removed
     //        once it is fixed!
     void OnScroll(wxScrollWinEvent& event) { HandleOnScroll(event); }