// 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();