How to dispatch a custom event in Actionscript 3

This is going to be a very simple example of how to dispatch an event. In actionscript 3, you dispatch an event by extending the EventDispatcher class. I’m not going to get into a big complicated explanation right now, but I will show you a couple of simple examples.

Load AS2 SWF into your AS3 Project

There is a Flash game that I have been working on that I’ve had to load into an as3 interface and I noticed that my previous class will not work to do this.

There were a few modifications that I had to make… Here is the Actionscript 3 class:

Load SWF via Actionscript 3 with this class

Here is a class that you can use to load swf’s into an object that you can display or do whatever you’d like with:

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// SWFLoader Class by Rick Nuthman
// 2.10.10
//
// Usage:
/*
var mySWF:Object;
mySWF = SWFLoader.create("urlToSWF.swf", 0,0);
mySWF.dispatcher.addEventListener("ready", displaySwf);
function displaySwf(event:Event){
    addChild(mySWF.swf);
}
*/


package com.frigidfish{

    import flash.display.Sprite;
    import flash.display.Loader;
    import flash.events.Event;
    import flash.net.URLRequest;
    import flash.events.EventDispatcher

    public class SWFLoader{        

        public function SWFLoader() {
        }

        public static function create(url, x=0,y=0):Object {
           
            var loaded:Event                = new Event("ready");
            var dispatcher:EventDispatcher  = new EventDispatcher();
            var swf:Sprite                  = new Sprite  ;
            var mLoader:Loader              = new Loader  ;
            var obj:Object                  = new Object;
           
            obj.swf = swf;
            obj.dispatcher = dispatcher;
           
            swf.x = x;
            swf.y = y;
           
            var mRequest:URLRequest = new URLRequest(url);
            mLoader.contentLoaderInfo.addEventListener(Event.COMPLETE,swfLoaded);

            mLoader.load(mRequest);

            function swfLoaded(event:Event) {
                var target = event.currentTarget.content;              
                swf.addChild(target);  
                dispatcher.dispatchEvent(loaded);
            }
           
            return obj;
        }
    }
}

You don’t need to make an instance of the class, just use the static function ‘create’ like so:

flash and php – Send/Receive Variables from Actionscript 3 & PHP

Below is a class that I made that can be used to send a group of variables to a php script on a server and receive the results. I use this all the time when working between flash and php in my projects!

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// FlashPHP Class by Rick Nuthman
// 8.28.09
// Constructor receives 2 arguments:
// url:String - The url to the PHP file
// flashVars:Object - An object that contains variables to be sent to the url
//
// The class dispatches 1 event called "ready" once the php transaction is complete.
// listen for this event. Once it's received you can access returned variabled from receievedVars.

package com.frigidfish{

    import flash.net.URLVariables;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.net.URLLoaderDataFormat;
    import flash.net.URLRequestMethod;
    import flash.events.EventDispatcher;
    import flash.events.Event;

    public class FlashPHP extends EventDispatcher {
       
        // Public Properties
        public var receivedVars:URLVariables;      
       
        // Private Properties
        private var url:String;    
        private var flashVars:Object;
        private var request:URLRequest;
       
        private var completeEvent:Event              = new Event("ready");
        private var variables:URLVariables           = new URLVariables();
        private var loader:URLLoader                 = new URLLoader();

        public function FlashPHP(url:String, flashVars:Object) {
           
            this.flashVars                      = flashVars;
            this.url                            = url+"?r="+ new Date().getTime();
           
            parseVariables();
        }

        // Private Methods
        private function parseVariables() {
           
            for (var item in flashVars) {
               
                variables[item] = flashVars[item];             
            }
           
            sendVariables();
        }

        private function sendVariables() {
           
            request                                 = new URLRequest(url);
            request.method                          = URLRequestMethod.POST;
            request.data                            = variables;
           
            loader.dataFormat                       = URLLoaderDataFormat.VARIABLES;           
            loader.addEventListener(Event.COMPLETE, variablesAreLoaded);
            loader.load(request);
        }

        function variablesAreLoaded(event:Event) {
           
            receivedVars                            = new URLVariables(loader.data);
            dispatchEvent(completeEvent);          
        }
    }
}

Here is an example of how to implement it:

actionscript 3 preloader freezes at 100% (SOLVED!)

Have you ever embedded an swf into an html docuement and all seemed fine until you started getting calls from customers saying that the preloader is stuck at 100%?

Well I have, and it took me quite some time to figure this out.