Saturday, September 08, 2007

Very Important Event in AS3: Event.ADDED_TO_STAGE

Event.ADDED_TO_STAGE is SO important it's ridiculous I took me so long to find it.
If you're creating a swf that will be loaded by an external loader, you need this event to be trigger before even thinking about accessing any of the stage properties.
With this event you can access the stage from the loaded movieclip.

If you don't check this event, stage will only return null.


Loader:

var request:URLRequest = new URLRequest("yourConstructor.swf");
loader = new Loader();

loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, loadProgress);
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadComplete);

function loadProgress(event:ProgressEvent):void {
var percentLoaded:Number = event.bytesLoaded/event.bytesTotal;
percentLoaded = Math.round(percentLoaded * 100);
trace("Loading: "+percentLoaded+"%");
}
function loadComplete(event:Event):void {
trace("Complete");
addChild(loader); // when this is done this will fire the Event.ADDED_TO_STAGE event
}


Loaded content class:


public function yourConstructor(){
this.addEventListener(Event.ADDED_TO_STAGE, init);
}

public function init(event:Event):void{
trace(stage.quality)
}

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Comments:
OMG YOU R A LIFESAVER THANK YOU! I've been searching high and low for exactly this!
 
I am trying to load mySWF into a MC on my stage. I can't seem to get it to work properly.

I used a simple loader
// Simple Loader
var n = new Loader();
n.load(new URLRequest("CommercialJet_MC.swf"));
importMC.addChild(n);

But i was unable to get interaction between that to the root.
 
Thanks!! Looking all over for this piece of sage advice that seems to be missing from everyone's pre-loader tutorials. I'm so glad i found this page.
 
nice work!
 
Thank you for this post!
Got my complicated .swf with lots of classes also preloaded!
 
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I had to delivery a huge project today and... I really looked around really the whole night...
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Ran into this problem almost two years after your post! Thank you, this is apparently very overlooked given the number of hits I got on this issue while searching it on Google. It worked great and now I'm back on track :)
 
YOU ROCK!!! It really is an easy but MUST KNOWN event... I've searched for this for 3 days...
 
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