Using setStyle() method with a trigger

           

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    <!-- behaviors\BehaviorsASStyles.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark"
    creationComplete="initApp();">
    <s:layout>
        <s:VerticalLayout />
    </s:layout>
    <fx:Script> 
         
        import mx.effects.Zoom; 
        // Define a new Zoom effect. 
        private var zEffect:Zoom = new Zoom(); 
        private function initApp():void { 
            // Set duration of zoom effect. 
            zEffect.duration = 1000; 
            // Define zoom in ratio. 
            zEffect.zoomHeightTo = 1.0; 
            zEffect.zoomWidthTo = 1.0; 
        } 
        private function applyZoomEffect(newZoom:Number):void { 
            zEffect.zoomHeightTo = newZoom; 
            zEffect.zoomWidthTo = newZoom; 
            // Apply or re-apply the Zoom effect to the Button control. 
            b1.setStyle("mouseDownEffect", zEffect); 
        } 
        private function resizeButton():void { 
            var newZoom:Number; 
            var n:Number = zEffect.zoomHeightTo; 
            if (n == 1.0) { 
                newZoom = 2.0; 
            } else { 
                newZoom = 1.0; 
            } 
            applyZoomEffect(newZoom); 
        } 
      
    </fx:Script>
    <mx:HBox>
        <mx:Button id="b1" label="Click Me" click="resizeButton();" />
    </mx:HBox>
</s:Application>

1.	Use setStyle() method, set it inline, or use Cascading Style Sheets (CSS)
2.	Using setStyle to programmatically manipulate a style property
3.	Use setStyle to change font size
4.	Use setStyle to change font style
5.	Cast target to a UIComponent before calling the setStyle() method
6.	Use setStyle() method
7.	Using the setStyle() method to apply graphical skins
8.	Use the setStyle() method to apply the custom class to the item renderer.
9.	Use getStyle() with effects defined in MXML
10.	Use getStyle() with behaviors defined in MXML
11.	Set a style property inline, and then reads that property with the getStyle() method

Using setStyle() method with a trigger : Style Get Set « Style « Flex

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