Question

I want to run some code whenever a DisplayObject is added as a child to a DisplayObjectContainer.
Or to put in other words, to catch the addedToStage event of all DisplayObjects, even ones I don’t know about.

Is it possible? and if not, any ideas on how to do something similar?

Answer 1

An ‘added’ event is dispatched whenever a child display object is added to the display list via addChild() or addChildAt(). In the DisplayObjectContainer class add the listener:

addEventListener(Event.ADDED, onAdded);

and the handler:

private function onAdded(e:Event):void
{
    trace('number of children is now ' + numChildren);
}