[vtkusers] multiple vtkContourWidgets in a single vtkIMageActor

[Prathamesh Kulkarni]

Hello all,

I want to annotate several layers in a image using vtkContourWidget.

I could add more then one widget and make it stick to the
vtkImageActor. However, I want to be able to interact with both (or
more) widgets using a single callback. That is, when the user
interacts with any of the widgets,  I want the callback to
automatically know which of the two representations to use.

Any help will be highly appreciated.



Prathamesh