A ButtonBar control automatically adds or removes children based on changes to the dataProvider property
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<!-- dpcontrols\spark\SparkBBarSimpleModDP.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<s:layout>
<s:VerticalLayout />
</s:layout>
<fx:Script>
// Add data item, and button, to the ButtonBar.
private function addFlexToDP():void {
myBB.dataProvider.addItem("Flex");
addFlex.enabled=false;
removeFlex.enabled=true;
}
// Remove data item, and button, from the ButtonBar.
private function removeFlexToDP():void {
myBB.dataProvider.removeItemAt(4);
addFlex.enabled=true;
removeFlex.enabled=false;
}
</fx:Script>
<s:ButtonBar id="myBB">
<mx:ArrayCollection>
<fx:String>Flash</fx:String>
<fx:String>Director</fx:String>
<fx:String>Dreamweaver</fx:String>
<fx:String>ColdFusion</fx:String>
</mx:ArrayCollection>
</s:ButtonBar>
<s:Button id="addFlex" label="Add Flex" click="addFlexToDP();" />
<s:Button id="removeFlex" label="Remove Flex" enabled="false"
click="removeFlexToDP();" />
</s:Application>
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