OCCViewer_ViewWindow* anOCCViewWindow =
dynamic_cast<OCCViewer_ViewWindow*>(theViewWindow);
if ( anOCCViewWindow && anOCCViewWindow->getViewPort() ) {
OCCViewer_ViewWindow* anOCCViewWindow =
dynamic_cast<OCCViewer_ViewWindow*>(theViewWindow);
if ( anOCCViewWindow && anOCCViewWindow->getViewPort() ) {