[vtkusers] Events of vtkCommand under Mac os x

[Yan Pingkun]

Dear all,

I am trying to add observer to the interactor under Mac os x. But by 
far, I only succeeded with LeftButtonReleaseEvent. Everytime when I try 
to get keyboard input with KeyPressEvent or KeyReleaseEvent, it never 
works. It seems I just directly input some characters to the terminal 
window...

Actually what i am trying to do is control view angle through keyboard 
input. Because you can not get an exact angle through mouse 
interaction. Any good idea? Please help!

Thanks!

Rgds,
Pingkun