[vtkusers] Responding to custom events with vtkrenderInteractor

[Anja Ende]

Hello,

I am currently using vtkRenderWindowInteractor and this provides me
with most of the functionality that I need. However, I want to extend
it by having it respond to certain other user events (key stokes).
What is the best way to do this? Would I have to inherit from
vtkRenderWindowInteractor and provide these methods or is there a way
to simply "plug in" extra events, if one wants.

many thanks for your help.

Cheers,
Anja