Flex 事件分发(FlexViewer事件机制)剥离过程

将FlexViewer里面的事件分发及监听事件机制剥离出来在其他项目中使用

AppEvent.as

package com { import flash.events.Event; /** * @author SamSung * 创建时间：2014-7-24 下午1:21:05 * */ public class AppEvent extends Event { //-------------------------------------------------------------------------- // // Properties // //-------------------------------------------------------------------------- private var _data:Object; private var _callback:Function; public function AppEvent(type:String, data:Object = null, callback:Function = null) { super(type); _data = data; _callback = callback; } /** * The data will be passed via the event. It allows the event dispatcher to publish * data to event listener(s). */ public function get data():Object { return _data; } /** * @private */ public function set data(value:Object):void { _data = value; } /** * The callback function associated with this event. */ public function get callback():Function { return _callback; } /** * @private */ public function set callback(value:Function):void { _callback = value; } /** * Override clone */ public override function clone():Event { return new AppEvent(this.type, this.data, this.callback); } /** * Dispatch this event. */ public function dispatch():Boolean { return EventBus.instance.dispatchEvent(this); } /** * Dispatch an AppEvent for specified type and with optional data and callback reference. */ public static function dispatch(type:String, data:Object = null, callback:Function = null):Boolean { return EventBus.instance.dispatchEvent(new AppEvent(type, data, callback)); } public static function addListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void { EventBus.instance.addEventListener(type, listener, useCapture, priority, useWeakReference); } public static function removeListener(type:String, listener:Function, useCapture:Boolean = false):void { EventBus.instance.removeEventListener(type, listener, useCapture); } } }

EventBus.as

package com { import flash.events.Event; import flash.events.EventDispatcher; /** * The EventBus allows centrallized communication among modules without * point-to-point messaging. It uses the singleton design pattern * to make sure one event bus is available globally. The bus itself * is only available to the container. Modules use the container's * static method to communicate with the event bus. */ public class EventBus extends EventDispatcher { /** Application event bus instance */ public static const instance:EventBus = new EventBus(); /** * Normally the EventBus is not instantiated via the <b>new</b> method directly. * The constructor helps enforce only one EvenBus availiable for the application * (singeton) so that it asures the communication only via a sigle event bus. */ public function EventBus() { } /** * The factory method is used to create a instance of the EventBus. It returns * the only instanace of EventBus and makes sure no another instance is created. */ [Deprecated(replacement="instance")] public static function getInstance():EventBus { return instance; } /** * Basic dispatch function, dispatches simple named events. In the case * that the event is only significant by the event token (type string), * this new dispatch method simplify the code. */ [Deprecated(replacement="AppEvent.dispatch")] public function dispatch(type:String):Boolean { return dispatchEvent(new Event(type)); } } }

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