Sorting Columns in Datagrid

Question

Developing in Flash, AS3.
I have a datagrid that uses a custom cellrenderer class to allow me to use a combobox. I have an invisible column that holds the value returned by the cellrenderer when the combobox value is changed. BUT sorting is wonky. Since what really lives in the combobox column individual cells is an object, it never really sorts properly. Is there a way to fire a sorting event to the column that holds the real value?
Thanks in advance!

Answer 1

Thank you very much for your quick reply. Would you mind providing an example that will work with a combobox?
Right now, I'm using this bit of code, just to track which cel is being interacted with:
          public function gridItemSelected(e:ListEvent):void {
               trace ("***");
               trace( "Row Index: " + e.rowIndex);
               trace( "Column Index: " + e.columnIndex);
               var colName:String  =  e.target.columns[e.columnIndex].dataField;
               trace( "Column Field Name: " +colName);
               trace( "Cell data: " +e.item[colName]);
               trace("***");
which traces out something like this:
Row Index: 0
Column Index: 0
Column Field Name: cname
Cell data: [object Object],[object Object],[object Object],[object Object],[object Object]