}
- if (_state==true)
+ if ( (_state==true) && (_layerImageBase->GetActorPresent()) )
{
wxVtk2DBaseView *wxvtk2Dbaseview = (wxVtk2DBaseView*) _vtkInteractorStyleBaseView->GetWxVtk2DBaseView();
wxVTKRenderWindowInteractor *wxVTKiren = wxvtk2Dbaseview->GetWxVTKRenderWindowInteractor();