10
Dec 07Actionscript 3.0 Scopeless Event Dispatcher
I've had this code around since my as 2.0 devirginizing(awhile ago..ahaha) So I decided to transfer it into AS3. It's a very simple class, but what it does is pretty cool, basically you can have events that aren't tied to specific classes or objects. Basically class A can talk to class D without knowing who class D is... just knowing it has to send out an event... if that makes sense. While i think the way Events especially in AS3 are great, and i will use them more often than not... its always nice to have something to fall back on when you need 2 or more things to talk without necessarily knowing who they are. Heres my source :
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package com.rLuce.utils {
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public class EventManager {
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/*
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* Event Manager: Ryan Luce
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* Methods:
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* addEventListener : Adds an event to the list
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* dispatchEvent : Calls all functions related to that Event, and passes an object(or Event) if necessary
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*
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* */
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private static var Events:Array = [];
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//Standard addeventlistener
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public static function addEventListener(eventName:String, fncRef:Function):void
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{
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if(Events[eventName] != null) {
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Events[eventName].push(fncRef);
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} else {
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Events[eventName] = [];
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Events[eventName].push(fncRef);
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}
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}
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public static function removeEventListener(eventName:String, fncRef:Function):void
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{
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//this hasn't been tested i think i need to slice(a, (a + 1)) if my logic is even right
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//haven't had to get into this and this was a quick port from my as2 class which was a bit different
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for(var a:Number = 0; a <Events[eventName].length; a++)
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if(Events[eventName] == fncRef)
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trace("Removing: " + Events[eventName].slice(a,a));
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}
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public static function dispatchEvent(eventName:String, obj:*= null):void
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{
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if(Events[eventName] != null)
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for(var a = 0; a <Events[eventName].length; a++)
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Events[eventName][a](obj);
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}
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}
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}
Usage for this is pretty simple, just like the normal event dispatcher. I haven't tested this thoroughly yet, and will this coming week... will update it when i have time. I'll post a file up here as well with the class... to make it a bit easier.
Edit: Here you go: (right click save as)
EventManager.as