tourdeflexmodules/src/mx/effects/ZoomEffectExample.mxml

<?xml version="1.0" encoding="utf-8"?>
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      this work for additional information regarding copyright ownership.
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          http://www.apache.org/licenses/LICENSE-2.0

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<!-- Simple example to demonstrate the Zoom effect. -->
<mx:Module xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:mx="library://ns.adobe.com/flex/mx"
				paddingBottom="0" paddingTop="0" paddingLeft="0" paddingRight="0"
				height="100%" width="100%">

     <fx:Script>
        <![CDATA[		
            import flash.events.MouseEvent;
		
            public function doZoom(event:MouseEvent):void {
                if (zoomAll.isPlaying) {
                    zoomAll.reverse();
                }
                else {
                    // If this is a ROLL_OUT event, play the effect backwards. 
                    // If this is a ROLL_OVER event, play the effect forwards.
                    zoomAll.play([event.target], event.type == MouseEvent.ROLL_OUT ? true : false);
                }
            }
        ]]>	
    </fx:Script>

	<fx:Declarations>
   		<mx:Zoom id="zoomAll" zoomWidthTo="0.5" zoomHeightTo="0.5" zoomWidthFrom="0.25" zoomHeightFrom="0.25"  />
	</fx:Declarations>
	
    <mx:Panel title="Zoom Effect Example"
				paddingBottom="10" paddingTop="10" paddingLeft="10" paddingRight="10"
				height="100%" width="100%">

        <mx:Text width="100%"
            text="Move the mouse over the image to enlarge it. Move the mouse off of the image to shrink it."/>

        <mx:Image id="img"
            source="@Embed(source='assets/ApacheFlexLogo.png')"
            scaleX="0.25" scaleY="0.25"
            rollOver="doZoom(event)"
            rollOut="doZoom(event)"/>

    </mx:Panel>
</mx:Module>