ListScrollToBottomExample.as

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
					   xmlns:s="library://ns.adobe.com/flex/spark"
					   xmlns:mx="library://ns.adobe.com/flex/mx"
					   applicationComplete="applicationCompleteHandler(event)">
	<fx:Script>
		<![CDATA[
			import mx.collections.ArrayCollection;
			import mx.collections.IList;
			import mx.events.FlexEvent;
			import mx.events.PropertyChangeEvent;
			[Bindable]
			private var dp : IList;

			protected function applicationCompleteHandler( event : FlexEvent ) : void {
				var a : Array = [];
				var count : int = 0;
				while ( ++count <= 100 ) {
					a.push( "Foo " + count );
				}
				dp = new ArrayCollection( a );
			}

			protected function list_creationCompleteHandler( event : FlexEvent ) : void {
				// Does not work with mouse wheel or arrow buttons due to bug http://bugs.adobe.com/jira/browse/SDK-26533
				/* list.scroller.verticalScrollBar.addEventListener( Event.CHANGE, verticalScrollBarChangeHandler ); */
				list.scroller.viewport.addEventListener( PropertyChangeEvent.PROPERTY_CHANGE, propertyChangeHandler );
			}

			protected function propertyChangeHandler( event : PropertyChangeEvent ) : void {
				if ( event.property == "verticalScrollPosition" ) {
					if ( event.newValue == ( event.currentTarget.measuredHeight - event.currentTarget.height )) {
						trace( "scrolled to end" );
					}
				}
			}
		]]>
	</fx:Script>

	<s:List id="list"
			height="100%"
			creationComplete="list_creationCompleteHandler(event)"
			dataProvider="{dp}"/>

</s:WindowedApplication>