[vtkusers] Setup an interactor when using vtkImageViewer

[Gheorghe Postelnicu]

Hi,

I would like to use vtkImageViewer in a Python script, but I have a
hard time using the interactor associated with the renderer.

The method viewer.GetRenderWindow().GetInteractor() returns None and I
see there is a protected member interactor in vtkImageViewer.

Any suggestions?

Thanks,
-- 
Gheorghe Postelnicu, PhD
MGH, Harvard Medical School