[flexcoders] RTE when using itemRenderers in DataGrid.

[michael_ramirez44]

I have been struggling with this issue for about 2 weeks. I was able 
to reproduce it in a small example. I add and remove an itemRenderer 
to a datagrid column at run-time. This only won't cause the RTE but I 
also set the datagrids dataProvider again which causes the error. You 
will need the Flash Player Debug version to actually see the error. 
You can view the example application at 
http://develop.gurufaction.com/flexbug/App.swf . I have also include 
the source with this post.

--- App.mxml ---
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; 
creationComplete="initApp()">
<mx:Script>
<![CDATA[
import mx.collections.*;

public var renderer:ClassFactory;

public function initApp():void
{
loadData(10);
}

public function loadData(rows:uint):void
{
var gridData:ArrayCollection = new ArrayCollection();
for( var x:int = 0; x < rows; x++)
{
var vo:Object = new Object();
vo.fname = "John" ;
vo.lname = "Doe";
vo.job = "Programmer";
gridData.addItem(vo);
}

dg.dataProvider = gridData;
}

public function withRenderer():void
{
renderer = new ClassFactory(LinkRenderer);
fname.itemRenderer = renderer;
loadData(50);
}

public function withOutRenderer():void
{
fname.itemRenderer = null;
loadData(100);
}
]]>
</mx:Script>
<mx:TextArea text="To reproduce bug click 'With Item Renderer' and 
then scroll datagrid!" width="300"/>
<mx:HBox>
<mx:Button id="wBtn" click="withRenderer()" label="With Item 
Renderer"/> 
<mx:Button id="woBtn" click="withOutRenderer()" label="WithOut Item 
Renderer"/>
</mx:HBox>
<mx:DataGrid id="dg" width="300" height="400">
<mx:columns>
<mx:DataGridColumn id="fname" dataField="fname" 
headerText="Firstname" />
<mx:DataGridColumn id="lname" dataField="lname" 
headerText="Lastname" />
<mx:DataGridColumn id="job" dataField="job" headerText="Job 
Description" />
</mx:columns>
</mx:DataGrid>
</mx:Application>

--- LinkRenderer.mxml --
<?xml version="1.0" encoding="utf-8"?>
<mx:HBox xmlns:mx="http://www.adobe.com/2006/mxml"; width="100%" 
height="100%" horizontalAlign="left">
<mx:Script>
<![CDATA[

]]>
</mx:Script>
<mx:LinkButton id="linkBtn" label="John"/>
</mx:HBox>