HP Touchpad issues in Umbrello

The problem with controlling the zoom seems to stem from the fact that 
the underlying library (Qt) is interpreting touchpad gestures as mouse 
wheel events.

In the file umbrello/umlview.cpp I edited the overloaded wheelEvent() 
function to simply return at the top of the method. Up to now, this 
seems to work OK.

I would suggest that there should be a configuration option for this 
(i.e. whether or not to respond to wheel events)?