[vtkusers] How to remove points/handle from one vtkDistanceWidget or vtkAngleWidget?

[Arnaud GELAS]

Hi all,

I would like to be able to
  * delete points/handles from these widgets with a key
  * reinitialize these widgets without any points/handle on the screen.

I could not figure out how to proceed?
Is it possible with the existing code?

Thanks,

Best Regards,
Arnaud