Set the default leaf icon to null to hide it, and uses custom icons for the folder open and closed icons
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<!-- dpcontrols/adg/SimpleHierarchicalADGTreeIcons.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark">
<fx:Script>
import mx.collections.ArrayCollection;
[Bindable]
private var dpHierarchy:ArrayCollection = new ArrayCollection([
{Region:"Southwest", children: [
{Region:"Arizona", children: [
{Territory_Rep:"Barbara Jennings", Actual:38865, Estimate:40000},
{Territory_Rep:"Dana Binn", Actual:29885, Estimate:30000}]},
{Region:"Central California", children: [
{Territory_Rep:"Joe Smith", Actual:29134, Estimate:30000}]},
{Region:"Nevada", children: [
{Territory_Rep:"Bethany Pittman", Actual:52888, Estimate:45000}]},
{Region:"Northern California", children: [
{Territory_Rep:"Lauren Ipsum", Actual:38805, Estimate:40000},
{Territory_Rep:"T.R. Smith", Actual:55498, Estimate:40000}]},
{Region:"Southern California", children: [
{Territory_Rep:"Alice Treu", Actual:44985, Estimate:45000},
{Territory_Rep:"Jane Grove", Actual:44913, Estimate:45000}]}
]}
]);
</fx:Script>
<mx:AdvancedDataGrid width="100%" height="100%"
defaultLeafIcon="{null}" folderOpenIcon="@Embed(source='a.jpg')"
folderClosedIcon="@Embed(source='a.jpg')">
<mx:dataProvider>
<mx:HierarchicalData source="{dpHierarchy}" />
</mx:dataProvider>
<mx:columns>
<mx:AdvancedDataGridColumn dataField="Region" />
<mx:AdvancedDataGridColumn dataField="Territory_Rep"
headerText="Territory Rep" />
<mx:AdvancedDataGridColumn dataField="Actual" />
<mx:AdvancedDataGridColumn dataField="Estimate" />
</mx:columns>
</mx:AdvancedDataGrid>
</s:Application>
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