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Code from Flex 4 Documentation "Using Adobe Flex 4".
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<!-- dpcontrols\XMLListCollectionWithList.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"
width="550">
<fx:Script>
import mx.collections.XMLListCollection;
import mx.collections.ArrayCollection;
/* An XML object with categorized produce. */
[Bindable]
public var myData:XML= <catalog>
<category name="Meat">
<product name="Buffalo"/>
<product name="T Bone Steak"/>
<product name="Whole Chicken"/>
</category>
<category name="Vegetables">
<product name="Broccoli"/>
<product name="Vine Ripened Tomatoes"/>
<product name="Yellow Peppers"/>
</category>
<category name="Fruit">
<product name="Bananas"/>
<product name="Grapes"/>
<product name="Strawberries"/>
</category>
</catalog>;
/* An XMLListCollection representing the data for the shopping List. */
[Bindable]
public var listDP:XMLListCollection = new XMLListCollection(new XMLList());
/* Add the item selected in the Tree to the List XMLList data provider. */
private function doTreeSelect():void {
if (prodTree.selectedItem)
listDP.addItem(prodTree.selectedItem.copy());
}
/* Remove the selected in the List from the XMLList data provider. */
private function doListRemove():void {
if (prodList.selectedItem)
listDP.removeItemAt(prodList.selectedIndex);
}
</fx:Script>
<s:HGroup>
<mx:Tree id="prodTree" dataProvider="{myData}" width="200"
showRoot="false" labelField="@name" />
<s:VGroup>
<s:Button id="treeSelect" label="Add to List" click="doTreeSelect()" />
<s:Button id="listRemove" label="Remove from List" click="doListRemove()" />
</s:VGroup>
<s:List id="prodList" dataProvider="{listDP}" width="200"
labelField="@name" />
</s:HGroup>
</s:Application>
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