Flex中阻止默认事件的派发
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<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" creationComplete="init()" xmlns:components="com.antiy.components.*"><mx:Script><![CDATA[private function alarmHandler(event:Event):void{if (preventToggle.selected){event.preventDefault();trace("We prevent default event")}else{trace("We didn't prevent default event ");}}]]></mx:Script><mx:Button label="触发事件" click="myComp.triggerAlarm()"/><mx:CheckBox id="preventToggle" label="阻止默认事件？" selected="true"/><components:TestComponent id="myComp" alarm='alarmHandler(event)'/></mx:Application>?
package com.antiy.components{import flash.events.Event;import mx.controls.Alert;import mx.core.EventPriority;import mx.core.UIComponent;[Event(name='alarm', type='flash.events.Event')]public class TestComponent extends UIComponent{public function TestComponent(){super();addEventListener('alarm',alarmHandler,false,EventPriority.DEFAULT_HANDLER);}protected function alarmHandler(event:Event):void{if (!event.isDefaultPrevented()){Alert.show('默认事件没有被取消！');}}public function triggerAlarm():void{dispatchEvent(new Event('alarm',false,true));}}}??
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