<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">

    <mx:Script>
        <![CDATA[
            import mx.effects.DefaultListEffect;
            import mx.collections.ArrayCollection;
            
            [Bindable]
            private var myDP:ArrayCollection = new ArrayCollection(
                ['A','B','C','D','E','F','G','H']);
            
            private function deleteItem():void {
                // As each item is removed, the index of the other items changes.
                // So first get the items to delete, then determine their indices
                // as you remove them.
                var toRemove:Array = [];
                for (var i:int = 0; i < list0.selectedItems.length; i++)
                    toRemove.push(list0.selectedItems[i]);
                for (i = 0; i < toRemove.length; i++)
                    myDP.removeItemAt(myDP.getItemIndex(toRemove[i]));
            }

            private var zcount:int = 0;
            private function addItem():void {
                // Always add the new item after the third item,
                // or after the last item if the length is less than 3.
                myDP.addItemAt("Z"+zcount++,Math.min(3,myDP.length));
            }            
        ]]>
    </mx:Script>

    <!-- Define an instance of the DefaultListEffect effect, 
         and set its fadeOutDuration and color properties. -->
    <mx:DefaultListEffect id="myDLE" 
        fadeOutDuration="1000" 
        color="0x0000ff"/>

    <mx:Panel title="DefaultListEffect Example" width="75%" height="75%" 
        paddingTop="10" paddingLeft="10" paddingRight="10" paddingBottom="10">

        <mx:List id="list0" 
            width="150"
            dataProvider="{myDP}" 
            variableRowHeight="true" 
            fontSize="18" 
            allowMultipleSelection="true" 
            itemsChangeEffect="{myDLE}"/>
    
        <mx:Button 
            label="Delete item" 
            click="deleteItem();"/>
        <mx:Button 
            label="Add item" 
            click="addItem();"/>

    </mx:Panel> 
</mx:Application>