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chrisaiv on 02/11/08

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Last Edited at 02/11/08 05:33pm

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AS3: Using Loader for SWFs, JPEGs, GIF, and PNGs

/ Published in: ActionScript 3

The Loader class is used for handling Bitmap data such as jpegs, pngs and gifs. The only handlers most will find relevant are progressHandler and onCompleteHandler but I listed all of the available ones for people interested in creating bulletproof apps.

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/********************************
Event Listeners
********************************/
var imgLoader:Loader = new Loader();
	initBasicListeners( imgLoader );
	imgLoader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, progressHandler, false, 0, true);
	imgLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, onCompleteHandler, false, 0, true);
	imgLoader.load(new URLRequest(asset));

//These Event Listeners are used a lot so let's try to minimize redundancies
function initBasicListeners(dispatcher:IEventDispatcher):void
{
	dispatcher.addEventListener(HTTPStatusEvent.HTTP_STATUS, httpStatusHandler, false, 0, true);
	dispatcher.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler, false, 0, true);	
	dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler, false, 0, true);
}

/********************************
Event Handlers
********************************/
function httpStatusHandler (e:Event):void
{
	//trace("httpStatusHandler:" + e);
}
function securityErrorHandler (e:Event):void
{
	trace("securityErrorHandler:" + e);
}
function ioErrorHandler(e:Event):void
{
	trace("ioErrorHandler: " + e);
}
function progressHandler(e:Event):void
{
	trace(e.currentTarget.bytesLoaded + " / " + e.currentTarget.bytesTotal);
}

function onCompleteHandler (e:Event):void
{
	trace("imgCompleteHandler:" + e.currentTarget.content + " "  + e.currentTarget.loader);
	addChild( e.currentTarget.loader );
}

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