/*
 * 	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 = {			
			prevId: 		'prevBtn',
			prevText: 		'Previous',
			nextId: 		'nextBtn',	
			nextText: 		'Next',
			controlsShow:	true,
			controlsBefore:	'',
			controlsAfter:	'',	
			controlsFade:	true,
			firstId: 		'firstBtn',
			firstText: 		'First',
			firstShow:		false,
			lastId: 		'lastBtn',	
			lastText: 		'Last',
			lastShow:		false,				
			vertical:		false,
			speed: 			300,
			auto:			false,
			pause:			2000,
			continuous:		false,
			
			showCount:   4,
			paddingTop:     9,
			paddingBottom:  9,
			el: 'li',
			cont: 'ul',
			
			customHeight: 0,
			customWidth: 0,
			elPadding: 0,
			
			slideMul: 1
		}; 
		
		var options = $.extend(defaults, options);  

				
		this.each(function() {
			var obj = $(this);
			var s = $(options.el, obj).length;
			var w = $(options.el, obj).width(); 
			var h = $(options.el, obj).height(); 
			
			if (options.customWidth > 0) {
			    obj.width(options.customWidth);
			} else {
			    obj.width(w);
			}
			
			if (s < options.showCount) {
			    options.showCount = s;
			}
			
			if (options.vertical) {
			    if (options.customHeight > 0) {
			        h = options.customHeight;
			    } else { 
			        h = options.paddingTop + h + options.paddingBottom;
			    }
			    obj.height(h * options.showCount);
			} else {
			    if (options.customHeight > 0) {
			        h = options.customHeight;
			    }
			    
			    obj.height(h);
			    $(options.cont, obj).css('width', s * w);
			    $(options.el, obj).css('float', 'left');
			}
			
			obj.css("overflow", "hidden");
			var ts = s - options.showCount;
			var t = 0;
	
			$("a#"+options.nextId).click(function(){	
				animate("next",true); return false;
			});
			$("a#"+options.prevId).click(function(){		
				animate("prev",true); return false;
			});	
			
			
			function animate(dir, clicked) {
				var ot = t;
				
				switch(dir){
					case "next":
						t = ( (ot + options.slideMul) >= ts) ?  ts : t + options.slideMul;						
						break; 
					case "prev":
						t = ( (t - options.slideMul) <= 0) ? 0 : t - options.slideMul;
						break; 
					case "first":
						t = 0;
						break; 
					case "last":
						t = ts;
						break; 
					default:
						break; 
				};	
				
				var diff = Math.abs(ot-t);
				var speed = diff * options.speed;						

				
				if(!options.vertical) {
					p = ( t * w * -1 );
					$(options.cont, obj).animate(
						{ marginLeft: p }, 
						speed
					);				
				} else {
    				p = ( t * h * -1 );
    				$(options.cont, obj).animate(
    					{ marginTop: p },
    					speed
    				);					
				}
				
				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);