ActionScript/Flex: Augment MouseEvents with extra information

Posted by David Wolever on Stack Overflow See other posts from Stack Overflow or by David Wolever
Published on 2010-03-12T19:10:26Z Indexed on 2010/03/12 20:17 UTC
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I've got a business class, Spam and the corresponding view class, SpamView.

How can I augment MouseEvents coming out of SpamView so the MouseEvents which come out of it contain a reference to the instance of Spam which the SpamView is displaying?

Here's how I'd like to use it:

class ViewContainer {
    ...
        for each (spam in spams) {
            addChild(new SpamView(spam));
    ...

    function handleMouseMove(event:MouseEvent) {
        if (event is SpamViewMouseEvent)
            trace("The mouse is being moved over spam:", spam)
    }
}

Thanks!

Things I've considered which don't work:

  • Adding event listeners to each SpamView: the book keeping (making sure that they are added/removed properly) is a pain.

  • Using event.target: the event's target may be a child of the SpamView (which isn't very useful)

  • Listening for a MouseEvent, creating a new SpamViewMouseEvent, copying all the fields over, then dispatching that: copying all the fields manually is also a pain.

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