Knowing if a scroll view is being scrolled

FROM : Half Activist
DATE : Wed Feb 14 22:27:07 2007

Hi All,
   Is there a way to know if a scroll view is being scrolled?
   I mean, I'm have a rather big view, that draws shadings, and there 
can be a lot of them,
   and it slows down everything.
   What I'd like to do, is when drawing, change my drawing technics 
while scrolling
   and at the end draw in full quality, somewhat like the 
isInLiveResize feature of NSView.

Regards