Hi,

I'm wondering if it is possible to use the userData field of NSEvent in
MacRuby. I want to add tracking rectangles to a NSView subclass, and store
the object that is mouse has entered in the userData field. Something along
the lines of:

addTrackingRect(rect, owner:self, userData:obj, assumeInside:false)

...

def mouseEntered(event)
obj = event.userData[0]
end

However this produces the runtime error:

can't convert C/Objective-C value `0x800418240' of type `ƿ_\377' to Ruby
object (ArgumentError)

Is it possible to set the NSEvent userData field at all in MacRuby? I can
work around if not, but the userData field would be more efficient.

Thanks,
Kevin.