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-/*****************************************************************

- *

- * jsProgressBarHandler 0.3.3 - by Bramus! - http://www.bram.us/

- *

- * v 0.3.3 - 2008.11.10 - UPD: fixed IE compatibility issue (thanks Kevin - Sep 19 2008 / 6pm)

- *                      - UPD: setPercentage now parses the targetPercentage to an Integer to avoid infinite loop (thanks Jack - Sep 07 2008 / 9pm)

- *                      - UPD: Moved from Event.Observe(window, 'load', fn) to document.observe('dom:loaded', fn) in order to force people to use an up to date Prototype release.

- *                      - UPD: setPercentage now takes an overrideQueue param. If set the current queue is cleared.

- *                      - ADD: Added onTick callback event which gets called when the percentage is updated.

- *                      - ADD: Added stable (as in "non-crashing") versions of the additions which first surfaced in the (unreleased) 0.3.2 release

- *                             Preloading support partially implemented in IE as all versions (IE6,7&8) are quite hard to tame (one time they work, the next reload they don't anymore)

- * v 0.3.2 - 2008.04.09 (*UNRELEASED*)

- *                      - ADD: implemented preloading of images to avoid slight flicker when switching images (BUGGY!)

- *                      - ADD: percentage image now has class percentImage and percentage Text now has class percentText; This allows you to style the output easily.

- * v 0.3.1 - 2008.02.20 - UPD: fixed queue bug when animate was set to false (thanks Jamie Chong)

- *                      - UPD: update Prototype to version 1.6.0.2

- * v 0.3.0 - 2008.02.01 - ADD: animation queue, prevents from the progressbar getting stuck when multiple calls are made during an animation

- *                      - UPD: multiple barImages now work properly in Safari

- * v 0.2.1 - 2007.12.20 - ADD: option : set boxImage

- *                        ADD: option : set barImage (one or more)

- *                        ADD: option : showText

- * v 0.2   - 2007.12.13 - SYS: rewrite in 2 classs including optimisations

- *                        ADD: Config options

- * v 0.1   - 2007.08.02 - initial release

- *

- * @see http://www.barenakedapp.com/the-design/displaying-percentages on how to create a progressBar Background Image!

- *

- * Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/

- *

- *****************************************************************/

-

-

- /**

-  * CONFIG

-  * -------------------------------------------------------------

-  */

-

- 	// Should jsProgressBarHandler hook itself to all span.progressBar elements? - default : true

-		var autoHook	= true;	

- 

- 	// Default Options

-		var defaultOptions = {

-			animate		: true,										// Animate the progress? - default: true

-			showText	: true,										// show text with percentage in next to the progressbar? - default : true

-			width		: 120,										// Width of the progressbar - don't forget to adjust your image too!!!

-			boxImage	: 'images/bramus/percentImage.png',			// boxImage : image around the progress bar

-			barImage	: 'images/bramus/percentImage_back.png',	// Image to use in the progressbar. Can be an array of images too.

-			height		: 12,										// Height of the progressbar - don't forget to adjust your image too!!!

-			onTick		: function(pbObj) { return true }

-		}

-

- /**

-  * NO NEED TO CHANGE ANYTHING BENEATH THIS LINE

-  * -------------------------------------------------------------

-  */

-

-	/**

-	 * JS_BRAMUS Object

-	 * -------------------------------------------------------------

-	 */

-

-		if (!JS_BRAMUS) { var JS_BRAMUS = new Object(); }

-

-

-	/**

-	 * ProgressBar Class

-	 * -------------------------------------------------------------

-	 */

-

-		JS_BRAMUS.jsProgressBar = Class.create();

-

-		JS_BRAMUS.jsProgressBar.prototype = {

-

-

-			/**

-			 * Datamembers

-			 * -------------------------------------------------------------

-			 */

-			 

-				el				: null,								// Element where to render the progressBar in

-				id				: null,								// Unique ID of the progressbar

-				percentage		: null,								// Percentage of the progressbar

-

-				options			: null,								// The options

-

-				initialPos		: null,								// Initial postion of the background in the progressbar

-				initialPerc		: null,								// Initial percentage the progressbar should hold

-				pxPerPercent	: null,								// Number of pixels per 1 percent

-

-				backIndex		: null,								// index in the array of background images currently used

-				numPreloaded	: null,								// number of images preloaded

-

-				running			: null,								// is this one running (being animated) or not?

-

-				queue			: false,							// queue of percentages to set to

-

-

-			/**

-			 * Constructor

-			 *

-			 * @param HTMLElement el

-			 * @param string id

-			 * @param int percentage

-			 * @return void

-			 * -------------------------------------------------------------

-			 */

-			 

-				initialize		: function(el, percentage, options) {

-

-					// get the options

-					this.options			= Object.clone(defaultOptions);

-					Object.extend(this.options, options || {});

-

-					// datamembers from arguments

-					this.el				= $(el);

-					this.id				= $(el).id;

-					this.percentage		= 0;							// Set to 0 intially, we'll change this later.

-					this.backIndex		= 0;							// Set to 0 initially

-					this.numPreloaded	= 0;							// Set to 0 initially

-					this.running		= false;						// Set to false initially

-					this.queue			= Array();						// Set to empty Array initially

-

-					// datamembers which are calculatef

-					this.imgWidth		= this.options.width * 2;		// define the width of the image (twice the width of the progressbar)

-					this.initialPos		= this.options.width * (-1);	// Initial postion of the background in the progressbar (0% is the middle of our image!)

-					this.pxPerPercent	= this.options.width / 100;		// Define how much pixels go into 1%

-					this.initialPerc	= percentage;					// Store this, we'll need it later.

-

-					// enfore backimage array

-					if (this.options.barImage.constructor != Array) { 	// used to be (but doesn't work in Safari): if (this.options.barImage.constructor.toString().indexOf("Array") == -1) {

-						this.options.barImage = Array(this.options.barImage);

-					}

-

-					// preload Images

-					this.preloadImages();

-

-				},

-

-

-			/**

-			 * Preloads the images needed for the progressbar

-			 *

-			 * @return void

-			 * -------------------------------------------------------------

-			 */

-

-				preloadImages	: function() {

-

-					// loop all barimages

-					for (i = 0; i < this.options.barImage.length; i++) {

-

-						// create new image ref

-						var newImage = null;

-						newImage = new Image();

-

-						// set onload, onerror and onabort functions

-						newImage.onload		= function() { this.numPreloaded++; }.bind(this);

-						newImage.onerror	= function() { this.numPreloaded++; }.bind(this);

-						newImage.onabort	= function() { this.numPreloaded++; }.bind(this);

-

-						// set image source (preload it!)

-						newImage.src = this.options.barImage[i];

-

-						// image is in cache

-						if (newImage.complete) {

-							this.numPreloaded++;

-						}

-						

-					}

-

-					// if not IE, check if they're loaded

-					if (!Prototype.Browser.IE) {

-						this.checkPreloadedImages();

-

-					// if IE, just init the visuals as it's quite hard to tame all IE's

-					} else {

-						this.initVisuals();

-					}

-

-				},

-

-

-			/**

-			 * Check whether all images are preloaded and loads the percentage if so

-			 *

-			 * @return void

-			 * -------------------------------------------------------------

-			 */

-

-			 	checkPreloadedImages	: function() {

-

-					// all images are loaded, go init the visuals

-					if (parseInt(this.numPreloaded,10) >= parseInt(this.options.barImage.length,10) ) {

-

-						// initVisuals

-						this.initVisuals();

-

-					// not all images are loaded ... wait a little and then retry

-					} else {

-

-						if ( parseInt(this.numPreloaded,10) <= parseInt(this.options.barImage.length,10) ) {

-							// $(this.el).update(this.id + ' : ' + this.numPreloaded + '/' + this.options.barImage.length);

-							setTimeout(function() { this.checkPreloadedImages(); }.bind(this), 100);

-						}

-

-					}

-

-				},

-

-

-			/**

-			 * Intializes the visual output and sets the percentage

-			 *

-			 * @return void

-			 * -------------------------------------------------------------

-			 */				

-				

-				initVisuals		: function () {

-

-					// create the visual aspect of the progressBar

-					$(this.el).update(

-						'<img id="' + this.id + '_percentImage" src="' + this.options.boxImage + '" alt="0%" style="width: ' + this.options.width + 'px; height: ' + this.options.height + 'px; background-position: ' + this.initialPos + 'px 50%; background-image: url(' + this.options.barImage[this.backIndex] + '); padding: 0; margin: 0;" class="percentImage" />' + 

-						((this.options.showText == true)?'<span id="' + this.id + '_percentText" class="percentText">0%</span>':''));

-				

-					// set the percentage

-					this.setPercentage(this.initialPerc);

-				},

-			

-			

-			/**

-			 * Sets the percentage of the progressbar

-			 *

-			 * @param string targetPercentage

-			 * @param boolen clearQueue

-			 * @return void

-			 * -------------------------------------------------------------

-			 */

-				setPercentage	: function(targetPercentage, clearQueue) {

-					

-					// if clearQueue is set, empty the queue and then set the percentage

-					if (clearQueue) {

-						

-						this.percentage = (this.queue.length != 0) ? this.queue[0] : targetPercentage;

-						this.timer		= null;

-						this.queue 		= [];

-						

-						setTimeout(function() { this.setPercentage(targetPercentage); }.bind(this), 10);

-						

-					// no clearQueue defined, set the percentage

-					} else {

-					

-						// add the percentage on the queue

-						this.queue.push(targetPercentage);

-						

-						// process the queue (if not running already)

-						if (this.running == false) {

-							this.processQueue();

-						}

-					}

-					

-				},

-			

-			

-			/**

-			 * Processes the queue

-			 *

-			 * @return void

-			 * -------------------------------------------------------------

-			 */

-				

-				processQueue	: function() {

-					

-					// stuff on queue?

-					if (this.queue.length > 0) {

-						

-						// tell the world that we're busy

-						this.running = true;

-						

-						// process the entry

-						this.processQueueEntry(this.queue[0]);

-						

-					// no stuff on queue

-					} else {

-							

-						// return;

-						return;

-							

-					}

-					

-				},

-			

-			

-			/**

-			 * Processes an entry from the queue (viz. animates it)

-			 *

-			 * @param string targetPercentage

-			 * @return void

-			 * -------------------------------------------------------------

-			 */

-				

-				processQueueEntry	: function(targetPercentage) {

-										

-					// get the current percentage

-					var curPercentage	= parseInt(this.percentage,10);

-					

-					// define the new percentage

-					if ((targetPercentage.toString().substring(0,1) == "+") || (targetPercentage.toString().substring(0,1) == "-")) {

-						targetPercentage	= curPercentage + parseInt(targetPercentage);

-					}

-				

-					// min and max percentages

-					if (targetPercentage < 0)		targetPercentage = 0;

-					if (targetPercentage > 100)		targetPercentage = 100;

-					

-					// if we don't need to animate, just change the background position right now and return

-					if (this.options.animate == false) {

-						

-						// remove the entry from the queue 

-						this.queue.splice(0,1);	// @see: http://www.bram.us/projects/js_bramus/jsprogressbarhandler/#comment-174878

-						

-						// Change the background position (and update this.percentage)

-						this._setBgPosition(targetPercentage);

-					

-						// call onTick

-						if (!this.options.onTick(this)) {

-							return;	

-						}

-						

-						// we're not running anymore

-						this.running = false;

-						

-						// continue processing the queue

-						this.processQueue();

-						

-						// we're done!

-						return;

-					}

-					

-					// define if we need to add/subtract something to the current percentage in order to reach the target percentage

-					if (targetPercentage != curPercentage) {					

-						if (curPercentage < targetPercentage) {

-							newPercentage = curPercentage + 1;

-						} else {

-							newPercentage = curPercentage - 1;	

-						}						

-						callTick = true;						

-					} else {

-						newPercentage = curPercentage;

-						callTick = false;

-					}											

-											

-					// Change the background position (and update this.percentage)

-					this._setBgPosition(newPercentage);

-					

-					// call onTick

-					if (callTick && !this.options.onTick(this)) {

-						return;	

-					}

-					

-					// Percentage not reached yet : continue processing entry

-					if (curPercentage != newPercentage) {

-						

-						this.timer = setTimeout(function() { this.processQueueEntry(targetPercentage); }.bind(this), 10);

-						

-					// Percentage reached!

-					} else {

-														  

-						// remove the entry from the queue

-						this.queue.splice(0,1);

-						

-						// we're not running anymore

-						this.running = false;	

-						

-						// unset timer

-						this.timer = null;

-						

-						// process the rest of the queue

-						this.processQueue();

-						

-						// we're done!

-						return;

-					}

-					

-				},

-			

-			

-			/**

-			 * Gets the percentage of the progressbar

-			 *

-			 * @return int

-			 */

-				getPercentage		: function(id) {

-					return this.percentage;

-				},

-			

-			

-			/**

-			 * Set the background position

-			 *

-			 * @param int percentage

-			 */

-				_setBgPosition		: function(percentage) {

-					// adjust the background position

-						$(this.id + "_percentImage").style.backgroundPosition 	= (this.initialPos + (percentage * this.pxPerPercent)) + "px 50%";

-												

-					// adjust the background image and backIndex

-						var newBackIndex										= Math.floor((percentage-1) / (100/this.options.barImage.length));

-						

-						if ((newBackIndex != this.backIndex) && (this.options.barImage[newBackIndex] != undefined)) {

-							$(this.id + "_percentImage").style.backgroundImage 	= "url(" + this.options.barImage[newBackIndex] + ")";

-						}

-						

-						this.backIndex											= newBackIndex;

-					

-					// Adjust the alt & title of the image

-						$(this.id + "_percentImage").alt 						= percentage + "%";

-						$(this.id + "_percentImage").title 						= percentage + "%";

-						

-					// Update the text

-						if (this.options.showText == true) {

-							$(this.id + "_percentText").update("" + percentage + "%");

-						}

-						

-					// adjust datamember to stock the percentage

-						this.percentage	= percentage;

-				}

-		}

-

-

-	/**

-	 * ProgressHandlerBar Class - automatically create ProgressBar instances

-	 * -------------------------------------------------------------

-	 */

-	 

-		JS_BRAMUS.jsProgressBarHandler = Class.create();

-

-	

-		JS_BRAMUS.jsProgressBarHandler.prototype = {

-			

-			

-			/**

-			 * Datamembers

-			 * -------------------------------------------------------------

-			 */

-			 

-				pbArray				: new Array(),		// Array of progressBars

-		

-		

-			/**

-			 * Constructor

-			 *

-			 * @return void

-			 * -------------------------------------------------------------

-			 */

-			 

-				initialize			: function() {		

-				

-					// get all span.progressBar elements

-					$$('span.progressBar').each(function(el) {

-														 

-						// create a progressBar for each element

-						this.pbArray[el.id]	= new JS_BRAMUS.jsProgressBar(el, parseInt(el.innerHTML.replace("%",""))); 

-					

-					}.bind(this));

-				},

-		

-		

-			/**

-			 * Set the percentage of a progressbar

-			 *

-			 * @param string el

-			 * @param string percentage

-			 * @return void

-			 * -------------------------------------------------------------

-			 */

-				setPercentage		: function(el, percentage, clearQueue) {

-					this.pbArray[el].setPercentage(percentage, clearQueue);

-				},

-		

-		

-			/**

-			 * Get the percentage of a progressbar

-			 *

-			 * @param string el

-			 * @return int percentage

-			 * -------------------------------------------------------------

-			 */

-				getPercentage		: function(el) {

-					return this.pbArray[el].getPercentage();

-				}

-			

-		}

-

-

-	/**

-	 * ProgressHandlerBar Class - hook me or not?

-	 * -------------------------------------------------------------

-	 */

-	

-		if (autoHook == true) {

-			function initProgressBarHandler() { myJsProgressBarHandler = new JS_BRAMUS.jsProgressBarHandler(); }

-			document.observe('dom:loaded', initProgressBarHandler, false);

-		}
\ No newline at end of file