Setting a DataProvider to a custom itemRenderer in a DataGrid

Question

Hi,
I've got a DataGrid, with one column using a custom AS itemRenderer to display a ComboBox.  Everything works, but there are various "wierd" behaviors occuring (when I remove a row, the ComboBox of the next row in line resets to it's label, but none of the others do...  When I add a row, various apparently random comboboxes change their selectedItem, etc...)
Anyways, I had some luck isolating each of these individual bugs and squashing them, but each time I do, others seem to pop up.  I suspect the main issue is the way I'm setting the ComboBox's dataProvider.  The dataProvider is dynamic - an XML file generated from a MySQL table using PHP.  Knowing no other way to do so, I'm overriding the set data method and explicitly setting it there, like so:
override public function set data(value:Object):void{
  super.data = value;
  dataProvider = value.uom;  // value.uom is the XML
Is there a better way to set the data provider - an approach where I can set it once and therefor avoid the override entirely?  Again, the itemRenderer is an ActionScript class, and not implemented with XML...
<mx:DataGridColumn itemRenderer="renderers.UOMBox" dataField="uom" headerText="UOM" />
and...
package renderers{
  public class UOMBox extends ComboBox{
    ... etc ...
Thanks in advance.

Answer 1

How does this code work for you:
override public function set data(value:Object):void{
  if(value != null)  {
    super.data = value;
    dataProvider = value.uom;  // value.uom is the XML
  super.invalidateDisplayList();
The missing invalidateDisplayList in your code might be what will help with your problems.
Chris