[vtkusers] vtkInteractorStyleTrackballActor : How to move the actor along the the Z direction?

[Ashika Umanga Umagiliya]

Greetings all,

I use "vtkInteractorStyleTrackballActor" to move/rotate my vtkActor
objects using mouse.
I can move (pan) the object in XY plane using Shift+LeftMouseButton +
Mouse move.
When I use Right Mouse Button + Move the object get scaled.

How to change this behavior so that,when I press (Right Mouse
Button+Move) the object moves in Z direction ?


Best Regards,
Ashika