Not able to pass values to variables in extended Tree class

Question

Hi,
I have a as class that extends from Tree, additionally this
custom class defines
new class level variables as follows:
public class MyTree extends Tree {
public var arrayColl:ArrayCollection;
and i call this tree from mxml as follows:
<customTree:MyTree
arrayColl={list}
xmlns:customTree="../../.*"/>
Though my 'list' collections is not null, when i place an
alert in the constructor of extended tree class
it shows as null.
Please advice.
Thanks,
Lucky

Answer 1

below is the canvas:
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="
http://www.adobe.com/2006/mxml">
<mx:Script>
<![CDATA[
import mx.collections.IViewCursor;
import mx.collections.ArrayCollection;
import com.citi.ascript.TreeData;
import mx.controls.Alert;
import com.citi.ascript.CitiTree;
public var availableTreeDataColl:ArrayCollection;
public var selectedTreeDataColl:ArrayCollection;
public var treeData:TreeData;
public var srcTree:CitiTree;
public var availableTreeDataArray:Array = [{a:1},
{b:2},
{c:3}
public function formTreeData():void {
var tempColl:ArrayCollection = new
ArrayCollection(availableTreeDataArray);
availableTreeDataColl = new ArrayCollection();
for (var i:int=0; i<tempColl.length; i++) {
var tempTreeData:Object = tempColl
treeData = new TreeData();
treeData.a = tempTreeData.a;
treeData.b = tempTreeData.b;
treeData.c = tempTreeData.c;
availableTreeDataColl.addItem(treeData);
]]>
</mx:Script>
<mx:VBox>
<mx:Label text="Drag &amp; Drop the analysis sections
that you would like to include in the report" width="450"
height="20"/>
<mx:HBox id="treeContainer"
creationComplete="formTreeData();">
<customTree:MyTree treeList={availableTreeDataColl} //
here collection becomes null.
</customTree:MyTree>
</mx:HBox>
</mx:VBox>
</mx:Canvas>
The collection of TreeData is iterated in the customTree to
form xml which will act as dataprovider for tree.
and this canvas is added as a child for a panel in my main
application.
Hope this gives an idea.
Thanks,
Lucky