/*
 * 	Easy Slider 1.5 - jQuery plugin
 *	written by Alen Grakalic	
 *	http://cssglobe.com/post/4004/easy-slider-15-the-easiest-jquery-plugin-for-sliding
 *
 *	Copyright (c) 2009 Alen Grakalic (http://cssglobe.com)
 *	Dual licensed under the MIT (MIT-LICENSE.txt)
 *	and GPL (GPL-LICENSE.txt) licenses.
 *
 *	Built for jQuery library
 *	http://jquery.com
 *
 */
 
/*
 *	markup example for $("#slider").easySlider();
 *	
 * 	<div id="slider">
 *		<ul>
 *			<li><img src="images/01.jpg" alt="" /></li>
 *			<li><img src="images/02.jpg" alt="" /></li>
 *			<li><img src="images/03.jpg" alt="" /></li>
 *			<li><img src="images/04.jpg" alt="" /></li>
 *			<li><img src="images/05.jpg" alt="" /></li>
 *		</ul>
 *	</div>
 *
 */

(function($) {

	$.fn.easySlider = function(options){
	  
		// default configuration properties
		var defaults = {	
			controlsShow:	true,
			controlsBefore:	'',
			controlsAfter:	'',	
			controlsFade:	true,
			firstId: 		'firstBtn',
			firstText: 		'First',
			firstShow:		false,
			lastId: 		'lastBtn',	
			lastText: 		'Last',
			lastShow:		false,				
			vertical:		false,
			speed: 			800,
			auto:			false,
			pause:			2000,
			continuous:		false
		}; 
		
		var options = $.extend(defaults, options); 
		var s = $("li", $(this)).length;
		var ts = s-1;
		var t = 0;
		
		if(ts < 4){
			$("#nextBtn img").attr({src : "/images/btn_next_dis.jpg"});
			$("#prevBtn img").attr({src : "/images/btn_prev_dis.jpg"}); 			
		}
		else{
			$("#prevBtn img").attr({src : "/images/btn_prev_dis.jpg"}); 
			$("#nextBtn img").attr({src : "/images/btn_next.gif"});
		}
				
				
		this.each(function() { 
			var obj = $(this); 
			var w = $("li", obj).width(); 
			var h = $("li", obj).height(); 
			
			obj.width(w); 
			obj.height(h); 
			obj.css("overflow","hidden");
			$("ul", obj).css('width',s*w);			
			if(!options.vertical) $("li", obj).css('float','left');
	
			$("#nextBtn").click(function(){	
				animate("next",true);
			});
			$("#prevBtn").click(function(){		
				animate("prev",true);				
			});
			
			function animate(dir,clicked){
				var ot = t;	
				switch(dir){
					case "next":
						t = (((t+1)*3) >= ts ) ?  t : t+1;
						if(((t+1)*3) >= ts ){
							$("#nextBtn img").attr({src : "/images/btn_next_dis.jpg"});	
							if(ts > 3){$("#prevBtn img").attr({src : "/images/btn_prev.gif"});}
						}
						else{
						$("#prevBtn img").attr({src : "/images/btn_prev.gif"});
						$("#nextBtn img").attr({src : "/images/btn_next.gif"});
						}									
						break; 
					case "prev":
						t = (t <= 0) ? (options.continuous ? ts : 0) : t-1;
						if(t==0){
							$("#prevBtn img").attr({src : "/images/btn_prev_dis.jpg"});
							if(ts > 3){$("#nextBtn img").attr({src : "/images/btn_next.gif"});}
						}
						else{$("#nextBtn img").attr({src : "/images/btn_next.gif"});}
						break; 
					default:
						break; 
				};	
				var diff = Math.abs(ot-t);
				var speed = diff*options.speed;						
				if(!options.vertical) {
					p = (t*w*-1);
					$("ul",obj).animate(
						{ marginLeft: p }, 
						speed
					);				
				} else {
					p = (t*h*-1);
					$("ul",obj).animate(
						{ marginTop: p }, 
						speed
					);					
				};
				
				if(!options.continuous && options.controlsFade){					
					if(t==ts){
						//$("a","#"+options.nextId).hide();
						//$("a","#"+options.lastId).hide();
					} else {
						$("a","#"+options.nextId).show();
						$("a","#"+options.lastId).show();					
					};
					if(t==0){
						//$("a","#"+options.prevId).hide();
						//$("a","#"+options.firstId).hide();
					} else {
						$("a","#"+options.prevId).show();
						$("a","#"+options.firstId).show();
					};					
				};				
				
				if(clicked) clearTimeout(timeout);
				if(options.auto && dir=="next" && !clicked){;
					timeout = setTimeout(function(){
						animate("next",false);
					},diff*options.speed+options.pause);
				};
				
			};
			// init
			var timeout;
			if(options.auto){;
				timeout = setTimeout(function(){
					animate("next",false);
				},options.pause);
			};		
		
			if(!options.continuous && options.controlsFade){					
				//$("a","#"+options.prevId).hide();
				//$("a","#"+options.firstId).hide();				
			};				
			
		});
	  
	};

})(jQuery);