A new functionality has been introduced that allows users who are familiar with the Spark itemRenderer functionality to use a similar approach to create itemRenderer for Halo DataGrid and Tree (since there is not currently a Spark DataGrid or Tree).
This is accomplished using the MXItemRenderer class. For DataGrid, the MXDataGridItemRenderer is used, for Tree, the MXTreeItemRenderer. In both cases, Spark Components can be used in there Halo components in an almost identical manner as they in Spark components. Here is an example of what an MXDataGridItemRenderer looks like: