_boxWidgetVolume->PlaceWidget();
_boxWidgetVolume->AddObserver( vtkCommand::InteractionEvent, _vtkclipping3Ddataviewer->GetObserverV() );
_boxWidgetVolume->HandlesOn ();
_boxWidgetVolume->PlaceWidget();
_boxWidgetVolume->AddObserver( vtkCommand::InteractionEvent, _vtkclipping3Ddataviewer->GetObserverV() );
_boxWidgetVolume->HandlesOn ();