// accordion.js v2.0
//
// Copyright (c) 2007 stickmanlabs
// Author: Kevin P Miller | http://www.stickmanlabs.com
// 
// Accordion is freely distributable under the terms of an MIT-style license.
//
// I don't care what you think about the file size...
//   Be a pro: 
//	    http://www.thinkvitamin.com/features/webapps/serving-javascript-fast
//      http://rakaz.nl/item/make_your_pages_load_faster_by_combining_and_compressing_javascript_and_css_files
//
/*
2-2-2008	Trey Aughenbaugh
made a few updates based on the comments from here.
http://stickmanlabs.com/2007/07/12/accordion-v10-released/#comments

-Updated it to work with new version of Prototype 1.6 and scriptaculous 1.8
-Updated to remove flicker
Added ability to have a callback function.
Useful for making AJAX calls.
Also Added the ability to specifiy which call will get executed each time.
Use the ID sttribute of the DIV for reference.  REQUIRED for callback.

/*
/*-----------------------------------------------------------------------------------------------*/
// accordion.js v2.0
//
// Copyright (c) 2007 stickmanlabs
// Author: Kevin P Miller | http://www.stickmanlabs.com
// 
// Accordion is freely distributable under the terms of an MIT-style license.
//
// I don't care what you think about the file size...
//   Be a pro: 
//	    http://www.thinkvitamin.com/features/webapps/serving-javascript-fast
//      http://rakaz.nl/item/make_your_pages_load_faster_by_combining_and_compressing_javascript_and_css_files
//

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

if (typeof Effect == 'undefined') 
	throw("accordion.js requires including script.aculo.us' effects.js library!");

var accordion = Class.create();
accordion.prototype = {

	//
	//  Setup the Variables
	//
	showAccordion : null,
	currentAccordion : null,
	duration : null,
	effects : [],
	animating : false,
	
	//  
	//  Initialize the accordions
	//
	initialize: function(container, options) {
	  if (!$(container)) {
	    throw(container+" doesn't exist!");
	    return false;
	  }
	  
		this.options = Object.extend({
			resizeSpeed : 8,
			classNames : {
				toggle : 'accordion_toggle',
				toggleActive : 'accordion_toggle_active',
				content : 'accordion_content'
			},
			defaultSize : {
				height : null,
				width : null
			},
			direction : 'vertical',
			onEvent : 'click'
		}, options || {});
		
		this.duration = ((11-this.options.resizeSpeed)*0.15);

		var accordions = $$('#'+container+' .'+this.options.classNames.toggle);
		accordions.each(function(accordion) {
			Event.observe(accordion, this.options.onEvent, this.activate.bind(this, accordion), false);
			if (this.options.onEvent == 'click') {
			  accordion.onclick = function() {return false;};
			}
			
			if (this.options.direction == 'horizontal') {
				var options = {width: '0px', display:'none'};
			} else {
				var options = {height: '0px', display:'none'};
			}
//			options.merge({display: 'none'});			
			
			this.currentAccordion = $(accordion.next(0)).setStyle(options);
		}.bind(this));
	},
	
	//
	//  Activate an accordion
	//
	activate : function(accordion) {
		if (this.animating) {
			return false;
		}
		
		this.effects = [];
	
		this.currentAccordion = $(accordion.next(0));
		this.currentAccordion.setStyle({
			display: 'block'
		});		
		
		this.currentAccordion.previous(0).addClassName(this.options.classNames.toggleActive);

		if (this.options.direction == 'horizontal') {
			this.scaling = $H({
				scaleX: true,
				scaleY: false
			});
		} else {
			this.scaling = $H({
				scaleX: false,
				scaleY: true
			});			
		}
			
		if (this.currentAccordion == this.showAccordion) {
		  this.deactivate();
		} else {
		  this._handleAccordion();
		}
	},
	// 
	// Deactivate an active accordion
	//
	deactivate : function() {
		var options = $H({
		  duration: this.duration,
			scaleContent: false,
			transition: Effect.Transitions.sinoidal,
			queue: {
				position: 'end', 
				scope: 'accordionAnimation'
			},
			scaleMode: { 
				originalHeight: this.options.defaultSize.height ? this.options.defaultSize.height : this.currentAccordion.scrollHeight,
				originalWidth: this.options.defaultSize.width ? this.options.defaultSize.width : this.currentAccordion.scrollWidth
			},
			afterFinish: function() {
				this.showAccordion.setStyle({
          height: 'auto',
					display: 'none'
				});				
				this.showAccordion = null;
				this.animating = false;
			}.bind(this)
		});    
//    options.merge(this.scaling);

    this.showAccordion.previous(0).removeClassName(this.options.classNames.toggleActive);
    
		new Effect.Scale(this.showAccordion, 0, options.update(this.scaling).toObject());
	},

  //
  // Handle the open/close actions of the accordion
  //
	_handleAccordion : function() {
		var options = $H({
			sync: true,
			scaleFrom: 0,
			scaleContent: false,
			transition: Effect.Transitions.sinoidal,
			scaleMode: { 
				originalHeight: this.options.defaultSize.height ? this.options.defaultSize.height : this.currentAccordion.scrollHeight,
				originalWidth: this.options.defaultSize.width ? this.options.defaultSize.width : this.currentAccordion.scrollWidth
			}
		});
		options.merge(this.scaling);
		
		this.effects.push(
			new Effect.Scale(this.currentAccordion, 100, options.update(this.scaling).toObject())
		);

		if (this.showAccordion) {
			this.showAccordion.previous(0).removeClassName(this.options.classNames.toggleActive);
			
			options = $H({
				sync: true,
				scaleContent: false,
				transition: Effect.Transitions.sinoidal
			});
			options.merge(this.scaling);
			
			this.effects.push(
				new Effect.Scale(this.showAccordion, 0, options.update(this.scaling).toObject())
			);				
		}
		
    new Effect.Parallel(this.effects, {
			duration: this.duration, 
			queue: {
				position: 'end', 
				scope: 'accordionAnimation'
			},
			beforeStart: function() {
				this.animating = true;
			}.bind(this),
			afterFinish: function() {
				if (this.showAccordion) {
					this.showAccordion.setStyle({
						display: 'none'
					});				
				}
				$(this.currentAccordion).setStyle({
				  height: 'auto'
				});
				this.showAccordion = this.currentAccordion;
				this.animating = false;
			}.bind(this)
		});
	}
}