[vtkusers] check for pending tk events

[David Gobbi]

Hi All,

I'm looking for a way to abort a render if a user interacts with the
window, and the easiest way seems to be for the window's AbortCheck
method to check if there are any tk events pending.

Is there a way, either in raw tk or within the vtkTkRenderWidget, to
check if there are events pending?  I've searched the tk documentation
with no luck.

 - David

-- 
  David Gobbi, MSc                dgobbi at imaging.robarts.ca
  Advanced Imaging Research Group
  Robarts Research Institute, University of Western Ontario