[flexcoders] Problem with DataGrid ItemRenderer

[pasflex]

We have a datagrid that is using an item renderer that consists of an 
HBox implementing IDropInListItemRenderer with a few components in 
it.  One of these components is a Text component used so some text 
can be wrapped.

The problem is there are a few cases were the datagrid does not seem 
to size the cell properly to the item renderer.  The easiest case to 
demonstrate is sorting the datagrid.  The datagrid renders fine when 
first loaded but if a column is sorted the row heights no longer are 
variable, they are all the same height.  Is there something else that 
needs to be in the item renderer?

Here's some simplified code that demonstrates the problem (run it, 
then sort the columns to see the issue):

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml";>
        <mx:Script>
                <![CDATA[
                        import mx.collections.ArrayCollection;
                        
                        [Bindable]
                        private var dataSet:ArrayCollection = new 
ArrayCollection([{item:1, text:"Some text"},
                                              {item:2, text:"Some 
really long text that should wrap."}]);
                ]]>
        </mx:Script>
        <mx:DataGrid dataProvider="{dataSet}" 
variableRowHeight="true" width="200">
                <mx:columns>
                        <mx:DataGridColumn dataField="item"/>
                        <mx:DataGridColumn dataField="text" 
itemRenderer="MyRenderer"/>
                </mx:columns>
        </mx:DataGrid>
</mx:Application>

<?xml version="1.0" encoding="utf-8"?>
<mx:HBox xmlns:mx="http://www.adobe.com/2006/mxml";
             
implements="mx.controls.listClasses.IDropInListItemRenderer" >
        <mx:Text id="myText" width="100%"/>
        <mx:Script>
                <![CDATA[
                        import 
mx.controls.dataGridClasses.DataGridListData;
                        import mx.controls.listClasses.BaseListData;
                        import mx.events.FlexEvent;
                        
                    [Bindable("dataChange")]                    
        
                    private var _listData:BaseListData;
                    
                    public function get listData():BaseListData
                    {
                      return _listData;
                    }
                    
                    public function set listData
(value:BaseListData):void
                    {
                      _listData = value;                    
                      dispatchEvent(new FlexEvent
(FlexEvent.DATA_CHANGE));
                    }
                        
                        override protected function updateDisplayList
(w:Number, h:Number):void
                        {
                                super.updateDisplayList(w, h);
                                if (data != null )
                                {
                                        var ld:DataGridListData = 
DataGridListData(_listData);
                                        myText.text = ld.label;
                                        
                                }
                        }
                
                ]]>
        </mx:Script>
</mx:HBox>