XMLList node items to Class

Question

Hello,
I am using adobe's sample code on how to use a Tree component
and I am trying to make it open a popup TitleWindow on every
selection change. The problem is that I am unable to figure out how
to make the selected item Class and the debugger gives a Type Error
about conversion of XMLList to Class. What am I doing wrong? :(
This is my code:
[Bindable]
public var selectedNode:XML;
public function treeChanged(event:Event):void {
selectedNode=Tree(event.target).selectedItem as XML;
import mx.managers.PopUpManager;
var selectedItem:Class = selectedNode.win;
PopUpManager.createPopUp(this,selectedItem,false);
and on XMLList I have
<node label="Sample Label" win="mmenu"/>
mmenu.mxml exists in my project with a titlewindow to be used
as popup
What am I missing?
the error is like TypeError: Error #1034: Type Coercion
failed: cannot convert XMLList@6d25fd1 to Class.
Thanks in advance...

Answer 1

First, PopUpManager requires a class in that arg, not the
string name of a class. You need to rethink this perhaps. There are
ways to instantiate class instances from a string, try
searching/googling that.
This: "selectedNode.win" returns an XMLList, all e4x
expressions do. Hence the error message when you attempt to assign
it to a var typed Class. Now, used correctly, since that expression
references a text node, it returns text as you expect. I believe
the class is using toString() on the XMLList behind the scenes.
Tracy