/* -------------------------------------
	Галерея с неравномерным шагом
	autor: Alexandr Golovko 
	www.xiper.net
----------------------------------------	
*/
(function(jQuery){
    
    jQuery.fn.flsGallery = function(options) {
 		
		var settings = jQuery.extend({
			btnNext: "#btnNext",
			btnPrev: "#btnPrev",
			mouseWheel: true,
			speed: 500
        }, options);
 
        this.each(function(){
						  
			jQuery(this).wrapInner("<div class='flsGalleryInner'></div>");
			var containerWidth = jQuery(this).width();
            var current = 0;
			var totalWidth = 10;
			var points = new Array();
			var i=0;
			points[0]=0;
			var count;

			jQuery(".flsGalleryInner li").each(function(){
				totalWidth += jQuery(this).width();
				i++;
				points[i] = totalWidth;
			});
			jQuery(".flsGalleryInner").css("width",totalWidth);
			count =i++;
	
			jQuery(settings.btnPrev).addClass('disabled');
			if (containerWidth > totalWidth) jQuery(settings.btnNext).addClass('disabled');
			
			if(settings.btnPrev)
            	jQuery(settings.btnPrev).click(function() {
					goPrev()
	            });

        	if(settings.btnNext)
            	jQuery(settings.btnNext).click(function() {
					goNext()
				});


			if(settings.mouseWheel) {
				
			jQuery('.flsGalleryInner').bind('mousewheel', function(event, delta) {
				return delta>0 ? goPrev() : goNext();
			});
			}

			
			function goNext() {
				if (!jQuery(settings.btnNext).hasClass('disabled'))
				{
				var i=0;  
				while (points[i]-current <= containerWidth) {
					
					i++;
					}
					if (i == count) {
						jQuery(settings.btnNext).addClass('disabled');
					} 
					jQuery(settings.btnPrev).removeClass('disabled');
					goRight(-totalWidth+points[i]);
					current = points[i] - containerWidth;
				}
			}
			

			function goPrev() {
				if (!jQuery(settings.btnPrev).hasClass('disabled'))
				{
				var i=0;  
				while (points[i]< current ) {
					
					i++;
					}
					current = points[i-1];
					if (i == 1) {
						jQuery(settings.btnPrev).addClass('disabled');
						current = 0;
					}
					jQuery(settings.btnNext).removeClass('disabled');
					goLeft(points[i-1]);
				}			
			}

			function goRight(pixel) {
				jQuery(".flsGalleryInner").animate({
					left: containerWidth - pixel - totalWidth
				  }, settings.speed
				);
			}

			function goLeft(pixel) {
				jQuery(".flsGalleryInner").animate({
					left: -pixel
				  }, settings.speed
				);
			}

        });
        
        return this;
        
    };
    
})(jQuery);