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QueueLoader AS3 Guide (rev10)

Posted: December 4, 2007 at 4:59 pm

Latest Version Info:
Click here for the current rev

Click here for the usage guide

Click here for the change log

Also click here for any posts related to the latest changes:
QueueLoader Updates

Here are some different ways to use QueueLoader.

Basic Loading

import com.hydrotik.utils.QueueLoader;
import com.hydrotik.utils.QueueLoaderEvent;
 
var _oLoader:QueueLoader = new QueueLoader();
var img = new Sprite();
addChild(img);
_oLoader.addItem("images/image1.jpg"), img, {title:"Image "});
_oLoader.execute();

Load Monitoring

import com.hydrotik.utils.QueueLoader;
import com.hydrotik.utils.QueueLoaderEvent;
 
var _oLoader:QueueLoader = new QueueLoader();
var img1 = new Sprite();
addChild(img1);
_oLoader.addItem("images/image1.jpg"), img1, {title:"Image 1"});
var img2 = new Sprite();
addChild(img2);
_oLoader.addItem("images/image2.jpg"), img2, {title:"Image 2"});
 
_oLoader.addEventListener(QueueLoaderEvent.QUEUE_START, onQueueStart, false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.ITEM_START, onItemStart, false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.ITEM_PROGRESS, onItemProgress, false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.ITEM_INIT, onItemInit,false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.ITEM_ERROR, onItemError,false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.QUEUE_PROGRESS, onQueueProgress, false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.QUEUE_INIT, onQueueInit,false, 0, true);
_oLoader.execute();
 
//Listener functions
function onQueueStart(event:QueueLoaderEvent):void {
	trace(">> "+event.type);
 
}
 
function onItemStart(event:QueueLoaderEvent):void {
	trace("\t>> "+event.type, "item title: "+event.title);
}
 
function onItemProgress(event:QueueLoaderEvent):void {
	trace("\t>> "+event.type+": "+[" percentage: "+event.percentage]);
}
 
function onQueueProgress(event:QueueLoaderEvent):void {
	trace("\t>> "+event.type+": "+[" queuepercentage: "+event.queuepercentage]);
}
 
function onItemInit(event:QueueLoaderEvent):void {
	trace("\n>>"+event.message+"\n");
}
 
function onItemError(event:QueueLoaderEvent):void {
	trace("\n>>"+event.message+"\n");
}
 
function onQueueInit(event:QueueLoaderEvent):void {
	trace("\n>>"+event.message+"\n");
}

Manually specifying a MIME type

import com.hydrotik.utils.QueueLoader;
import com.hydrotik.utils.QueueLoaderEvent;
 
var _oLoader:QueueLoader = new QueueLoader();
var img = new Sprite();
addChild(img);
_oLoader.addItem("images/image1.jpg"), img, {title:"Image ", mimeType:QueueLoader.FILE_IMAGE});
_oLoader.addEventListener(QueueLoaderEvent.QUEUE_INIT, onQueueInit,false, 0, true);
_oLoader.execute();

Loading XML

import com.hydrotik.utils.QueueLoader;
import com.hydrotik.utils.QueueLoaderEvent;
 
var _oLoader:QueueLoader = new QueueLoader();
var _xml:XML;
 
_oLoader.addItem("includes/admin/test.xml", null, {title:"XML"});
_oLoader.addEventListener(QueueLoaderEvent.ITEM_INIT, onItemInit,false, 0, true);
_oLoader.execute();
 
function onItemInit(event:QueueLoaderEvent):void {
	trace("\t>> XML: "+event.type, "item title: "+event.title);
	if(event.filetype == QueueLoader.FILE_XML){
		_xml = new XML(event.file);
	}
}

Loading CSS

import com.hydrotik.utils.QueueLoader;
import com.hydrotik.utils.QueueLoaderEvent;
 
var _oLoader:QueueLoader = new QueueLoader();
var _css:StyleSheet = new StyleSheet();
 
_oLoader.addItem("includes/admin/style.css", null, {title:"CSS"});
_oLoader.addEventListener(QueueLoaderEvent.ITEM_INIT, onItemInit,false, 0, true);
_oLoader.execute();
 
function onItemInit(event:QueueLoaderEvent):void {
	if(event.filetype == QueueLoader.FILE_CSS){
		trace("\t>> CSS: "+event.type, "item title: "+event.title);
		_css.parseCSS(event.file);
	}
}

Drawing the frames of an external SWF to Bitmap Objects in an Array

import com.hydrotik.utils.QueueLoader;
import com.hydrotik.utils.QueueLoaderEvent;
 
var externalImageBitmapContainer:Bitmap = new Bitmap();
addChild(externalImageBitmapContainer);
var externalImageContainer:Sprite = new Sprite();
addChild(externalImageContainer);
 
var _oLoader:QueueLoader = new QueueLoader();
_oLoader.addItem("flashassets/swf/externalimages.swf", externalImageContainer, {title:"externalimages", drawFrames:true});
_oLoader.addEventListener(QueueLoaderEvent.QUEUE_INIT, onQueueInit,false, 0, true);
_oLoader.execute();
 
function onQueueInit(event:QueueLoaderEvent):void {
	trace("** "+event.type);
	// This passes a Bitmap object of the 2nd frame
	// in the external swfstored in bmArray
	externalImageBitmapContainer.bitmapData = event.bmArray[1];
}

Accessing Class references in an externally loaded SWF

import com.hydrotik.utils.QueueLoader;
import com.hydrotik.utils.QueueLoaderEvent;
 
var addedDefinitions:LoaderContext = new LoaderContext();
addedDefinitions.applicationDomain = ApplicationDomain.currentDomain;
 
var _oLoader:QueueLoader = new QueueLoader(false, addedDefinitions, true);
 
var soundSWF = new MovieClip();
soundSWF.name = "externalSounds";
addChild(soundSWF);
 
var soundChannel:SoundChannel = new SoundChannel();
 
_oLoader.addItem(prefix("") + "flashassets/swf/externalsounds.swf", soundSWF, {title:"sounds", drawSWF:false, mimeType:QueueLoader.FILE_SWF});
_oLoader.addEventListener(QueueLoaderEvent.QUEUE_INIT, onQueueInit,false, 0, true);
_oLoader.execute();
 
 
function onQueueInit(event:QueueLoaderEvent):void {
	trace("** "+event.type);
	var Loop1Reference:Class = getDefinitionByName("Loop1") as Class;
	var loop1:Sound = new Loop1Reference();
	soundChannel = loop1.play();
}

Adding items on the fly

import com.hydrotik.utils.QueueLoader;
import com.hydrotik.utils.QueueLoaderEvent;
 
 
var _oLoader:QueueLoader = new QueueLoader();
var imageContainer:Sprite = new Sprite();
addChild(imageContainer);
 
var _xml:XML;
 
_oLoader.addItem("includes/admin/test.xml", null, {title:"XML", mimeType:QueueLoader.FILE_XML});
_oLoader.addEventListener(QueueLoaderEvent.QUEUE_START, onQueueStart, false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.ITEM_START, onItemStart, false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.ITEM_PROGRESS, onItemProgress, false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.ITEM_INIT, onItemInit,false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.ITEM_ERROR, onItemError,false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.QUEUE_PROGRESS, onQueueProgress, false, 0, true);
_oLoader.addEventListener(QueueLoaderEvent.QUEUE_INIT, onQueueInit,false, 0, true);
_oLoader.execute();
 
function onQueueStart(event:QueueLoaderEvent):void {
	trace("\t>> "+event.type, "item title: "+event.title);
}
 
function onItemStart(event:QueueLoaderEvent):void {
	trace("\t>> "+event.type, "item title: "+event.title);
}
 
function onItemProgress(event:QueueLoaderEvent):void {
	trace("\t>> "+event.type+": "+[" percentage: "+event.percentage]);
}
 
function onQueueProgress(event:QueueLoaderEvent):void {
	trace("\t>> "+event.type+": "+[" queuepercentage: "+event.queuepercentage]);
}
 
function onItemInit(event:QueueLoaderEvent):void {
	trace("\t>> "+event.type, "item title: "+event.title);
 
	if (event.filetype == QueueLoader.FILE_XML) {
		_xml = new XML(event.file);
		var imageList:XMLList = _xml.images.children();
 
		for (var i:int = 0; i < imageList.length(); i++) {
			var img = new Sprite();
			imageContainer.addChild(img);
			_oLoader.addItem(imageList[i].attribute("src"), img, {title:"Image "+i});
		}
	}
}
 
function onItemError(event:QueueLoaderEvent):void {
	trace("\n>>"+event.message+"\n");
}
 
function onQueueInit(event:QueueLoaderEvent):void {
	trace("\t>> "+event.type, "item title: "+event.title);
}

This covers most of the features in the current rev. More to come!

The Discussion

see what everyone is saying

  • Justin Winter December 5th, 2007 at 12:11 am #1

    Strong work man! Hopefully I'll be able to contribute more in the near future.

  • hydrotik | flash/design/photography » Blog Archive » QueueLoader AS3 rev11 + Stable December 5th, 2007 at 11:53 pm #2

    [...] hydrotik | flash/design/photographyactionscript and creative playground of Donovan Adams QueueLoader AS3 Guide (rev10) [...]

  • Per December 6th, 2007 at 5:07 pm #3

    Hi, I'm really enjoying your QueueLoader, it has helped me a lot, thanks. I have one problem though, when I load an image into a sprite as in your example, the sprite height and width properties are 0 eventhough It shows fine on the screen?
    I need the height/width values for positioning of the sprites, what am I doing wrong?

  • Jay September 11th, 2008 at 3:52 am #4

    Thank you very much for this.
    You might want to do a toLowerCase() when you are testing for file names:

    if(currItem.url.toLowerCase().match(".jpg") != null) _currType = FILE_IMAGE;

    This prevents some troubles. ;-)

  • djdonovan September 11th, 2008 at 6:08 am #5

    There is both upper and lower case checking in the latest version.

  • djdonovan October 30th, 2008 at 12:07 am #6

    UPDATES Latest Update and Source!

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