Manually dispatch an event in an MXML tag

           
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
    initialize="createListener(event)">
    <mx:Script>
        import mx.controls.Alert;
        private function createListener(e:Event):void {
            b1.addEventListener(MouseEvent.CLICK, myClickHandler);
        }
        private function myClickHandler(e:Event):void {
            Alert.show("Triggered by the " + e.type + " event");
        }
      </mx:Script>
    <mx:Button id="b1" label="Click Me"
        mouseOver="b1.dispatchEvent(new MouseEvent(MouseEvent.CLICK, true, false))" />
</mx:Application>

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Manually dispatch an event in an MXML tag : Event « Event « Flex

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