mustella/tests/mx/states/Transition/SWFs/comps/AddRemoveTemplate.mxml

<?xml version="1.0" encoding="utf-8"?>
<!--

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  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
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  (the "License"); you may not use this file except in compliance with
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      http://www.apache.org/licenses/LICENSE-2.0

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  distributed under the License is distributed on an "AS IS" BASIS,
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  See the License for the specific language governing permissions and
  limitations under the License.

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<c:TransitionTemplate xmlns:fx="http://ns.adobe.com/mxml/2009"
					   xmlns:s="library://ns.adobe.com/flex/spark"
					   xmlns:mx="library://ns.adobe.com/flex/mx"
					   xmlns:c="comps.*"
					   width="500" height="300" initialize="onInit()">
	<fx:Script>
		<![CDATA[
			import mx.events.FlexEvent;
			
			protected function onInit():void
			{
				this.valueFunction = getX;
				this.initTrans = initMove;
				this.returnTrans = returnMove;
				this.currentState = "One";
			}
			
			protected function getX() : Number {
				var visible:Number = target.parent != null ? 1 : 0;
				visible = visible + (target2.parent != null ? 2 : 0);
				visible = visible + (target3.parent != null ? 4 : 0);
				return visible;
			}
			
		]]>
	</fx:Script>
	
	<fx:Declarations>
		<s:Transition id="initMove" fromState="One" toState="Two" autoReverse="true">
			<s:Parallel>
				<s:AddAction target="{target3}" duration="1000"
							 effectStart="effectStart(event)"
							 effectEnd="effectEnd(event)"
							 effectStop="effectStop(event)"
							 />
				<s:RemoveAction target="{target}" duration="1000"  
							 effectStart="effectStart(event)"
							 effectEnd="effectEnd(event)"
							 effectStop="effectStop(event)"
							 />
			</s:Parallel>
		</s:Transition>
		<s:Transition id="returnMove" fromState="Two" toState="One" autoReverse="true">
			<s:Parallel>
				<s:AddAction target="{target}"
							 effectStart="effectStart(event)"
							 effectEnd="effectEnd(event)"
							 effectStop="effectStop(event)"
							 />
				<s:RemoveAction target="{target3}" 
								effectStart="effectStart(event)"
								effectEnd="effectEnd(event)"
								effectStop="effectStop(event)"
								/>
			</s:Parallel>
		</s:Transition>
	</fx:Declarations>
	<c:states>
		<s:State name="One"/>
		<s:State name="Two"/>		
	</c:states>
	<mx:HBox>
		<s:Group id="target" includeIn="One">
			<s:Rect width="50" height="50">
				<s:fill>
					<s:SolidColor color="#FF0000"/>
				</s:fill>
			</s:Rect>
		</s:Group>
		<s:Group id="target2">
			<s:Rect width="50" height="50" >
				<s:fill>
					<s:SolidColor color="#00FF00"/>
				</s:fill>
			</s:Rect>
		</s:Group>
		<s:Group id="target3" includeIn="Two">
			<s:Rect width="50" height="50">
				<s:fill>
					<s:SolidColor color="#0000FF"/>
				</s:fill>
			</s:Rect>
		</s:Group>
	</mx:HBox>
</c:TransitionTemplate>