Added wxWindowBase::CentreOnParent to allow top level windows to be

centered over their parent (if they have one) instead of the entire
screen.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2754 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/window.h

@@ -259,6 +259,8 @@ public:
         // centre with respect to the the parent window
     void Centre( int direction = wxHORIZONTAL );
     void Center( int direction = wxHORIZONTAL ) { Centre(direction); }
+    void CentreOnParent(int direction = wxHORIZONTAL );
+    void CenterOnParent(int direction = wxHORIZONTAL ) { CentreOnParent(direction); }
 
         // set window size to wrap around its children
     virtual void Fit();