/** * @author Ryan Johnson <ryan@livepipe.net> * @copyright 2007 LivePipe LLC * @package Control.Rating * @license MIT * @url http://livepipe.net/projects/control_rating/ * @version 1.0.0 */if(typeof(Control) == 'undefined')	Control = {};Control.Rating = Class.create();Object.extend(Control.Rating,{	instances: [],	findByElementId: function(id){		return Control.Rating.instances.find(function(instance){			return (instance.container.id && instance.container.id == id);		});	}});Object.extend(Control.Rating.prototype,{	container: false,	value: false,	options: {},	initialize: function(container,options){		Control.Rating.instances.push(this);		this.value = false;		this.links = [];		this.container = $(container);		this.container.update('');		this.options = {			min: 1,			max: 5,			rated: false,			input: false,			reverse: false,			capture: false,			multiple: false,			classNames: {				off: 'rating_off',				half: 'rating_half',				on: 'rating_on',				selected: 'rating_selected'			},			updateUrl: false,			updateParameterName: 'value',			afterChange: Prototype.emptyFunction		};		Object.extend(this.options,options || {});		if(this.options.value){			this.value = this.options.value;			delete this.options.value;		}		if(this.options.input){			this.options.input = $(this.options.input);			this.options.input.observe('change',function(input){				this.setValueFromInput(input);			}.bind(this,this.options.input));			this.setValueFromInput(this.options.input,true);		}		var range = $R(this.options.min,this.options.max);		(this.options.reverse ? $A(range).reverse() : range).each(function(i){			var link = this.buildLink(i);			this.container.appendChild(link);			this.links.push(link);		}.bind(this));		this.setValue(this.value || this.options.min,false,true);	},	buildLink: function(rating){		var link = $(document.createElement('a'));		link.value = rating;		if(this.options.multiple || (!this.options.rated && !this.options.multiple)){			link.href = '';			link.onmouseover = this.mouseOver.bind(this,link);			link.onmouseout = this.mouseOut.bind(this,link);			link.onclick = this.click.bindAsEventListener(this,link);		}else{			link.style.cursor = 'default';			link.observe('click',function(event){				Event.stop(event);				return false;			}.bindAsEventListener(this));		}		link.addClassName(this.options.classNames.off);		return link;	},	disable: function(){		this.links.each(function(link){			link.onmouseover = Prototype.emptyFunction;			link.onmouseout = Prototype.emptyFunction;			link.onclick = Prototype.emptyFunction;			link.observe('click',function(event){				Event.stop(event);				return false;			}.bindAsEventListener(this));			link.style.cursor = 'default';		}.bind(this));	},	setValueFromInput: function(input,prevent_callbacks){		this.setValue((input.options ? input.options[input.options.selectedIndex].value : input.value),true,prevent_callbacks);	},	setValue: function(value,force_selected,prevent_callbacks){		this.value = value;		if(this.options.input){			if(this.options.input.options){				$A(this.options.input.options).each(function(option,i){					if(option.value == this.value){						this.options.input.options.selectedIndex = i;						throw $break;					}				}.bind(this));			}else				this.options.input.value = this.value;		}		this.render(this.value,force_selected);		if(!prevent_callbacks){			if(this.options.updateUrl){				var params = {};				params[this.options.updateParamterName] = this.value;				new Ajax.Request(this.options.updateUrl,{					parameters: params				});			}			this.notify('afterChange',this.value);		}	},	render: function(rating,force_selected){		(this.options.reverse ? this.links.reverse() : this.links).each(function(link){			if(link.value <= Math.ceil(rating)){				link.className = this.options.classNames[link.value <= rating ? 'on' : 'half'];				if(this.options.rated || force_selected)					link.addClassName(this.options.classNames.selected);			}else				link.className = this.options.classNames.off;		}.bind(this));	},	mouseOver: function(link){		this.render(link.value,true);	},	mouseOut: function(link){		this.render(this.value);	},	click: function(event,link){		this.options.rated = true;		this.setValue((link.value ? link.value : link),true);		if(!this.options.multiple)			this.disable();		if(this.options.capture){			Event.stop(event);			return false;		}	},	notify: function(event_name){		try{			if(this.options[event_name])				return [this.options[event_name].apply(this.options[event_name],$A(arguments).slice(1))];		}catch(e){			if(e != $break)				throw e;			else				return false;		}	}});if(typeof(Object.Event) != 'undefined')	Object.Event.extend(Control.Rating);