[flexcoders] Detecting List width from its itemRenderer

[Alexander]

Hello,

I have an itemRenderer for a List displaying
avatars for users in chat rooms - up to 3 of them.
It works ok (code below), but since the List
itself is inside of a HDividedBox and its width
can be changed, I would like to detect this
event and let my itemRenderer to display
bigger avatars (increase their scaleX, scaleY).

How do I detect this event and where can
I read-access the parent List width property?

Thank you
Alex

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"; 
width="100%" height="100%" xmlns:my="*" 
verticalScrollPolicy="off" horizontalScrollPolicy="off">

<mx:Script>
<![CDATA[

override public function set data(xlist:Object):void {
    var i:int;

    super.data = xlist;

    for (i = _user.length - 1; i >= 0; i--)
        _user[i].visible = false;

    if (xlist != null) {
        for (i = xlist.user.length() - 1; i >= 0; i--) {
            var xml:XML = xlist.user[i];
            _user[i].userid = x...@id;
            _user[i].avatar = x...@avatar;
            _user[i].nick = x...@name;
            _user[i].visible = true;
        }
    }
}

]]>
</mx:Script>

<mx:HBox width="100%" horizontalAlign="center">
<mx:Repeater id="_rpt" dataProvider="{[0, 1, 2]}">

<my:User id="_user" width="160" height="140" 
    scaleX="0.8" scaleY="0.8"/>

</mx:Repeater>
</mx:HBox>
</mx:Canvas>