[vtkusers] Interaction with vtkRenderWindowInteractor while a callback function is running.

[Aroosha Laghaee]

Dear All,

I wonder if anyone can tell me whether it is possible to interact with 
a vtkRenderWindowInteractor while a callback function is running as a 
result of a previous interaction?

Currently I have a set of functions which run when I interact with my 
scene in certain ways (e.g. I drag a ball about the scene which causes 
a robot arm to reach for it). But while the reaching behaviour function 
is running I can no longer interact with my window until my function 
returns. Is there any way of maintaining interaction before these 
callback functions return (e.g. press key to halt reaching behaviour)?

Many thanks,
        Aroosha