Changing the background color of a row using itemRendererFunction in Spark

Changing the background color of a cell in a DataGrid is much easier, in my opinion, using the Spark architecture. The itemRenderer I am using is all mxml and uses the Rect graphic as the background. Here is the simple itemRenderer with a gray background and grayed out text.

<?xml version=”1.0″ encoding=”utf-8″?>
<s:GridItemRenderer xmlns:fx=”http://ns.adobe.com/mxml/2009&#8243;
xmlns:s=”library://ns.adobe.com/flex/spark”
xmlns:mx=”library://ns.adobe.com/flex/mx” clipAndEnableScrolling=”true”>

<fx:Script>
<![CDATA[
override public function prepare(hasBeenRecycled:Boolean):void {
lblData.text = data[column.dataField]
}
]]>
</fx:Script>
<s:Rect top=”0″ bottom=”0″ right=”0″ left=”0″>
<s:fill>
<s:SolidColor color=”#E0E0E0″ alpha=”0.5″/>
</s:fill>
</s:Rect>
<s:Label id=”lblData” top=”9″ left=”7″ color=”0x505050″ alpha=”0.5″/>

</s:GridItemRenderer>

Using itemRendererFunction, I am determining whether to use this custom itemRenderer with the gray background, or the DefaultGridItemRenderer. If the item is in stock, use the DefaultGridItemRenderer, if it is not, use the custom itemRenderer. My itemRenderer function looks like this:

private function product_itemRendererFunction(item:Object, column:GridColumn):ClassFactory {

if(item.inStock)
return new ClassFactory(DefaultGridItemRenderer);
else
return new ClassFactory(OutOfStockItemRenderer);
}

Here are the files to download.

Sample Code: DataGrid_itemRendererFunctionExample.mxml, OutOfStockItemRenderer.mxml

Sample SWF: DataGrid_itemRendererFunctionExample.swf