Event Listener - Weak References

programming flash
1

Hi Guys, I’m having trouble understanding the weak reference flag with addEventListener() - specifically, using it seems to cause my listener to not fire. It surely has something to do with how everything is set up:

  1. I am calling a class called “ScrollBar”. This class does NOT extend movieclip, but its constructor takes a reference to a scrollbarMC movie clip.

  2. this ScrollBar class adds an event listener on the scrollbar MC like this:
    _scrollbar.addEventListener(MouseEvent.MOUSE_DOWN, onScrollBarDown, false, 0, true);

  3. my event handler looks like this:
    function onScrollBarDown( e : Event ) {
    trace(“mouse down!”);
    }

With the weak reference flag set, this handler never fires.

If I clear that flag (see below), the handler fires as expected
_scrollbar.addEventListener(MouseEvent.MOUSE_DOWN, onScrollBarDown, false, 0);

What’s up with that?

I don’t truly understand what I’m dealing with here, but I want to make sure my class cleans up after itself, and I won’t have the opportunity to call some kind of destructor method that removes the event listeners (easily).

Thanks for your help!

– Tom