[flexcoders] DataGrid.selectedItem assignment sometimes does nothing

Pan Troglodytes Wed, 01 Nov 2006 14:00:56 -0800

I'm running into a strange problem. I'm trying to catch the right-click on a DataGrid row and assign the selectedItem value of the DataGrid to it. Below is the even handler for the context menu popup:

    public function contextMenuPopup(e:ContextMenuEvent):void
    {
      if (e && e.mouseTarget && e.mouseTarget is DataGridItemRenderer &&
          DataGridItemRenderer( e.mouseTarget).data is ActivityAlert)
      {
        var data:ActivityAlert = ActivityAlert(DataGridItemRenderer( e.mouseTarget).data);
        var i:int = ArrayCollection(grid.dataProvider).getItemIndex(data);
        grid.selectedItem = data;
      }
    }

This works fine until I click to sort the grid. Then when I right-click on the row and step through it, I find that the "grid.selectedItem = data" line does nothing. The data var is set to a valid object that can be found in the dataprovider (as shown by the test line that does the getItemIndex). After this code, the grid.SelectedItemIndex is set properly. But grid.selectedItem always equals null. I've tried tracing through the DataGrid code for this but it's fairly complex.

Any idea on why this doesn't work?

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[flexcoders] DataGrid.selectedItem assignment sometimes does nothing

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