Hi Tom,
I'm working with V8.5. Maybe I'm missing something but I don't see how to hook a mouse wheel event like one would hook say a mouse move event:
imageView primaryWidget
addEventHandler: PointerMotionMask
receiver: receiver
selector: #pointerMotion:clientData:callData:
clientData: self.
where imageView is something like an AbtDrawingAreaView.
If there was a wheel event mask like PointerMotionMask, I would have been all set.
I'm now playing with an extension to OSWidget and a sub-class to OSInput that I can piggy back on a ButtonReleaseMask get rid of my other sub-classes.
Lou