[flexcoders] Figuring out which item within a column was clicked in AdvancedDataGrid

[whatabrain]

Let's say I have a single column which contains an image and some text. 
Then I get a click event from the AdvancedDataGrid. How do I tell 
whether the image was clicked, rather than the text?



<mx:rendererProviders>
<mx:AdvancedDataGridRendererProvider columnIndex="0" columnSpan="0" 
depth="1">
<mx:renderer>
<mx:Component>

<mx:HBox>
<mx:Image id="group_expand" source="img.gif"/>
<mx:Label text="hi"/>                                                   
</mx:HBox>

</mx:Component>
</mx:renderer>
</mx:AdvancedDataGridRendererProvider>
</mx:rendererProviders>