/**

  * Fx.ProgressBar

  *

  * @version		1.1

  *

  * @license		MIT License

  *

  * @author		Harald Kirschner <mail [at] digitarald [dot] de>

  * @copyright	Authors

  */

 

 Fx.ProgressBar = new Class({

 

 	Extends: Fx,

 

 	options: {

 		text: null,

 		url: null,

 		transition: Fx.Transitions.Circ.easeOut,

 		fit: true,

 		link: 'cancel'

 	},

 

 	initialize: function(element, options) {

 		this.element = $(element);

 		this.parent(options);

 				

 		var url = this.options.url;

 		if (url) {

 			this.element.setStyles({

 				'background-image': 'url(' + url + ')',

 				'background-repeat': 'no-repeat'

 			});

 		}

 		

 		if (this.options.fit) {

 			url = url || this.element.getStyle('background-image').replace(/^url\(["']?|["']?\)$/g, '');

 			if (url) {

 				var fill = new Image();

 				fill.onload = function() {

 					this.fill = fill.width;

 					fill = fill.onload = null;

 					this.set(this.now || 0);

 				}.bind(this);

 				fill.src = url;

 				if (!this.fill && fill.width) fill.onload();

 			}

 		} else {

 			this.set(0);

 		}

 	},

 

 	start: function(to, total) {

 		return this.parent(this.now, (arguments.length == 1) ? to.limit(0, 100) : to / total * 100);

 	},

 

 	set: function(to) {

 		this.now = to;

 		var css = (this.fill)

 			? (((this.fill / -2) + (to / 100) * (this.element.width || 1) || 0).round() + 'px')

 			: ((100 - to) + '%');

 		

 		this.element.setStyle('backgroundPosition', css + ' 0px').title = Math.round(to) + '%';

 		

 		var text = $(this.options.text);

 		if (text) text.set('text', Math.round(to) + '%');

 		

 		return this;

 	}

 

 });