/*
 * jQuery.navigate - Allow any group of dom elements to be navigated with the keyboard arrows
 * Tom Moor, http://tommoor.com
 * Copyright (c) 2011 Tom Moor
 * MIT Licensed
 * @version 1.1
 */

(function($){var handleKeyDown;var handleMouseOver;var navigate;var options;var $current;var $collection;var defaults={mouse:true,activeClass:'active',onSelect:function(){},onFocus:function(){},keys:{up:38,down:40,left:37,right:39,select:13}};var methods={init:function(o){options=$.extend(defaults,o);$current=this.first().addClass(options.activeClass);$collection=this;handleKeyDown=function(e){if(!e){var e=window.event;}
switch(e.keyCode){case options.keys.up:navigate(0,-1);break;case options.keys.down:navigate(0,1);break;case options.keys.left:navigate(-1,0);break;case options.keys.right:navigate(1,0);break;case options.keys.select:$current.trigger('click');break;}};handleMouseOver=function(){$('.'+options.activeClass).removeClass(options.activeClass).trigger('blur');$current=$(this).addClass(options.activeClass).trigger('focus');};navigate=function(x,y){var delta=x+y;var $closest=$current;var $difference=0;var a,b,d;$collection.each(function(){a=$(this);if(a===$current)return;if(x!==0)d=parseInt(a.position().left-$current.position().left);if(y!==0)d=parseInt(a.position().top-$current.position().top);if(!(d>0&&delta>0)&&!(d<0&&delta<0))return;b=Math.pow($current.position().left-a.position().left,2)+Math.pow($current.position().top-a.position().top,2);if(b<$difference||$difference===0){$closest=a;$difference=b;}});if(options.wrap&&$current===$closest)return;$current.removeClass(options.activeClass);$current.trigger('blur');$closest.addClass(options.activeClass);$closest.trigger('focus');$current=$closest;options.onFocus.call($current);}
$(document).bind('keydown',handleKeyDown);$collection.bind('click',options.onSelect);if(options.mouse)$collection.bind('mouseover',handleMouseOver);return this;},destroy:function(){if($collection){$(document).unbind('keydown',handleKeyDown);$collection.unbind('mouseover',handleMouseOver);$collection.unbind('click',options.onSelect);$collection.removeClass(options.activeClass);options=$current=$collection=null;}
return this;}};$.fn.navigate=function(method){if(methods[method]){return methods[method].apply(this,Array.prototype.slice.call(arguments,1));}else if(typeof method==='object'||!method){return methods.init.apply(this,arguments);}else{$.error('Method '+method+' does not exist on jQuery.navigate');}};})(jQuery);