int tmpPx,tmpPy;
wxVTKRenderWindowInteractor *wxVTKiren = _vtkInteractorStyleBaseView->GetWxVtk2DBaseView()->GetWxVTKRenderWindowInteractor();
wxVTKiren->GetEventPosition( tmpPx , tmpPy );
int tmpPx,tmpPy;
wxVTKRenderWindowInteractor *wxVTKiren = _vtkInteractorStyleBaseView->GetWxVtk2DBaseView()->GetWxVTKRenderWindowInteractor();
wxVTKiren->GetEventPosition( tmpPx , tmpPy );