<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
xmlns:s="library://ns.adobe.com/flex/spark"
creationComplete="handleCreationComplete();">
<mx:Script>
import mx.collections.ArrayCollection;
import spark.core.MaskType;
[Bindable] public var masks:ArrayCollection;
private function handleCreationComplete():void
{
masks = new ArrayCollection( [ MaskType.CLIP,MaskType.ALPHA,MaskType.LUMINOSITY ] );
maskList.selectedIndex = 0;
}
</mx:Script>
<s:DropDownList id="maskList" dataProvider="{masks}" />
<s:Group enabled="{maskList.selectedItem==MaskType.LUMINOSITY}">
<s:layout>
<s:HorizontalLayout />
</s:layout>
<mx:CheckBox label="A" />
<mx:CheckBox label="B" />
</s:Group>
</mx:Application>
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