(function($) {

	$.widget("thomaskahn.smoothDivScroll", {

		options: {
			scrollingHotSpotLeft: "div.scrollingHotSpotLeft", 
			scrollingHotSpotRight: "div.scrollingHotSpotRight", 
			scrollableArea : "div.scrollableArea",
			scrollWrapper: "div.scrollWrapper", 
			hiddenOnStart: false, 
			ajaxContentURL: "",
			countOnlyClass: "",
			scrollStep: 15,
			scrollInterval: 10,
			mouseDownSpeedBooster: 3, 
			autoScroll: "", 
			autoScrollDirection: "right", 
			autoScrollStep: 5,
			autoScrollInterval: 100,
			visibleHotSpots: "",
			hotSpotsVisibleTime: 5, 
			startAtElementId: ""
		},
		_create: function() {
		

			var self = this, o = this.options, el = this.element;
			
			el.data("scrollWrapper", el.find(o.scrollWrapper));
			el.data("scrollingHotSpotRight", el.find(o.scrollingHotSpotRight));
			el.data("scrollingHotSpotLeft", el.find(o.scrollingHotSpotLeft));
			el.data("scrollableArea", el.find(o.scrollableArea));
			el.data("speedBooster", 1);
			el.data("motherElementOffset", el.offset().left);
			el.data("scrollXPos", 0);
			el.data("hotSpotWidth", el.find(o.scrollingHotSpotLeft).width());
			el.data("scrollableAreaWidth", 0);
			el.data("startingPosition", 0);
			el.data("rightScrollInterval", null);
			el.data("leftScrollInterval", null);
			el.data("autoScrollInterval", null);
			el.data("hideHotSpotBackgroundsInterval", null);
			el.data("previousScrollLeft", 0);
			el.data("pingPongDirection", "right");
			el.data("getNextElementWidth", true);
			el.data("swapAt", null);
			el.data("startAtElementHasNotPassed", true);
			el.data("swappedElement", null);
			el.data("originalElements", el.data("scrollableArea").children(o.countOnlyClass));
			el.data("visible",true);
			el.data("initialAjaxContentLoaded", false);
			el.data("enabled", true);

			el.data("scrollWrapper").scrollLeft(el.data("startingPosition"));
			

			if(o.autoScroll !== "always") {
				switch(o.visibleHotSpots)
				{
					case "always":
						self.showHotSpotBackgrounds();
						break;
					case "onstart":
						self.showHotSpotBackgrounds();
						el.data("hideHotSpotBackgroundsInterval", setTimeout(function(){
							self.hideHotSpotBackgrounds("slow");
						},(o.hotSpotsVisibleTime * 1000)));
						break;
					default:
						break;
				}
			}

			el.data("scrollingHotSpotRight").bind("mousemove", function(e){
				var x = e.pageX - (this.offsetLeft + el.data("motherElementOffset"));
				el.data("scrollXPos", Math.round((x/el.data("hotSpotWidth")) * o.scrollStep));
				if(el.data("scrollXPos") === Infinity) { 
					el.data("scrollXPos", 0);
				}
			});	


			el.data("scrollingHotSpotRight").bind("mouseover", function(){	
				

				if((o.autoScroll === "onstart" && el.data("autoScrollInterval") !== null)) 
				{
					clearInterval(el.data("autoScrollInterval"));
					el.data("autoScrollInterval", null);
					self._trigger("autoScrollIntervalStopped");
				}


				el.data("rightScrollInterval", setInterval(function(){
				
					if(el.data("scrollXPos") > 0 && el.data("enabled"))
					{
						el.data("scrollWrapper").scrollLeft(el.data("scrollWrapper").scrollLeft() + (el.data("scrollXPos") * el.data("speedBooster")));
						
						self._showHideHotSpots();
					}
	
				}, o.scrollInterval));

				self._trigger("mouseOverRightHotSpot");
				
			});
			
			el.data("scrollingHotSpotRight").bind("mouseout", function(){
				clearInterval(el.data("rightScrollInterval"));
				el.data("scrollXPos", 0);
			});
			
			el.data("scrollingHotSpotRight").bind("mousedown", function(){
				el.data("speedBooster", o.mouseDownSpeedBooster);
			});
			
			$("body").bind("mouseup", function(){
				el.data("speedBooster", 1);
			});
		
			el.data("scrollingHotSpotLeft").bind("mousemove", function(e){
				var x = el.data("scrollingHotSpotLeft").innerWidth() - (e.pageX - el.data("motherElementOffset"));
				el.data("scrollXPos", Math.round((x/el.data("hotSpotWidth")) * o.scrollStep));
				if(el.data("scrollXPos") === Infinity) { 
					el.data("scrollXPos", 0);
				}
				
			});

			el.data("scrollingHotSpotLeft").bind("mouseover", function(){
				

				if((o.autoScroll === "onstart" && el.data("autoScrollInterval") !== null)) 
				{
					clearInterval(el.data("autoScrollInterval"));
					el.data("autoScrollInterval", null);
					self._trigger("autoScrollIntervalStopped");
				}
				
				el.data("leftScrollInterval", setInterval(function(){
					if(el.data("scrollXPos") > 0 && el.data("enabled")) {
						el.data("scrollWrapper").scrollLeft(el.data("scrollWrapper").scrollLeft() - (el.data("scrollXPos")*el.data("speedBooster")));
						
						self._showHideHotSpots();
					}
					
				}, o.scrollInterval));
				
				self._trigger("mouseOverLeftHotSpot");
			});
			
			el.data("scrollingHotSpotLeft").bind("mouseout", function(){
				clearInterval(el.data("leftScrollInterval"));
				el.data("scrollXPos", 0);
			});

			el.data("scrollingHotSpotLeft").bind("mousedown", function(){
				el.data("speedBooster", o.mouseDownSpeedBooster);
			});
			
			$(window).bind("resize", function(){

				if(!(o.hiddenOnStart)) { 
					self._showHideHotSpots();
				}
				
				self._trigger("windowResized");
			});
			
			if(o.ajaxContentURL.length > 0)
			{
				self.replaceContent(o.ajaxContentURL);
			}
			else
			{
				self.recalculateScrollableArea();
			}
			
			if(o.hiddenOnStart) { 
				self.hide();
			}
			
			if((o.autoScroll.length > 0) && !(o.hiddenOnStart) && (o.ajaxContentURL.length <= 0)) {
				self.startAutoScroll();
			}

		},

		showHotSpotBackgrounds: function(fadeSpeed)
		{
			var self = this, el = this.element;
			
			if(fadeSpeed !== undefined)
			{	
				el.data("scrollingHotSpotLeft").css("opacity","0.0");
				el.data("scrollingHotSpotRight").css("opacity","0.0");
				
				el.data("scrollingHotSpotLeft").addClass("scrollingHotSpotLeftVisible");
				el.data("scrollingHotSpotRight").addClass("scrollingHotSpotRightVisible");
				
				el.data("scrollingHotSpotLeft").fadeTo(fadeSpeed, 0.35);

				el.data("scrollingHotSpotRight").fadeTo(fadeSpeed, 0.35);
			}

			else
			{
				el.data("scrollingHotSpotLeft").addClass("scrollingHotSpotLeftVisible");
				el.data("scrollingHotSpotLeft").removeAttr("style");
				
				el.data("scrollingHotSpotRight").addClass("scrollingHotSpotRightVisible");
				el.data("scrollingHotSpotRight").removeAttr("style");
			}
			self._showHideHotSpots();
		},
		hideHotSpotBackgrounds: function(fadeSpeed)
		{
			var el = this.element;
			
			if(fadeSpeed !== undefined)
			{	
				el.data("scrollingHotSpotLeft").fadeTo(fadeSpeed, 0.0, function(){
					el.data("scrollingHotSpotLeft").removeClass("scrollingHotSpotLeftVisible");
				});

				el.data("scrollingHotSpotRight").fadeTo(fadeSpeed, 0.0,function(){
					el.data("scrollingHotSpotRight").removeClass("scrollingHotSpotRightVisible");
				});
			}
			else
			{
				el.data("scrollingHotSpotLeft").removeClass("scrollingHotSpotLeftVisible");
				el.data("scrollingHotSpotLeft").removeAttr("style");
				
				el.data("scrollingHotSpotRight").removeClass("scrollingHotSpotRightVisible");
				el.data("scrollingHotSpotRight").removeAttr("style");
			}
			
		},
		_showHideHotSpots: function()
		{
			var self = this, el = this.element, o = this.options;
			
			if(o.autoScroll !== "always")
			{
				if(el.data("scrollableAreaWidth") <= (el.data("scrollWrapper").innerWidth()))
				//if(el.data("scrollableAreaWidth") <= 597 )
				{
					el.data("scrollingHotSpotLeft").hide();
					el.data("scrollingHotSpotRight").hide();
				}
				else if (el.data("scrollWrapper").scrollLeft() === 0)
				{
					el.data("scrollingHotSpotLeft").hide();
					el.data("scrollingHotSpotRight").show();

					self._trigger("scrollLeftLimitReached");

					clearInterval(el.data("leftScrollInterval"));
					el.data("leftScrollInterval", null);
				}
				else if (el.data("scrollableAreaWidth") <= (el.data("scrollWrapper").innerWidth() + el.data("scrollWrapper").scrollLeft()))
				{
					el.data("scrollingHotSpotLeft").show();
					el.data("scrollingHotSpotRight").hide();
					self._trigger("scrollRightLimitReached");
					clearInterval(el.data("rightScrollInterval"));
					el.data("rightScrollInterval", null);
				}
				else
				{
					el.data("scrollingHotSpotLeft").show();
					el.data("scrollingHotSpotRight").show();
				}
			}
			else
			{
				el.data("scrollingHotSpotLeft").hide();
				el.data("scrollingHotSpotRight").hide();
			}
		},
		moveToElement: function(moveTo, elementNumber) {
			var self = this, el = this.element, o = this.options, tempScrollableAreaWidth = 0, foundStartAtElement = false;
			
			switch(moveTo)
			{
				case "first":
					el.data("scrollXPos", 0);
					self._trigger("movedToFirstElement");
					break;
				case "start":
					
					el.data("scrollableArea").children(o.countOnlyClass).each(function() {
	
						if( (o.startAtElementId.length > 0) && (($(this).attr("id")) === o.startAtElementId) ) 
						{
							el.data("startingPosition", tempScrollableAreaWidth);
							foundStartAtElement = true;
						}
						tempScrollableAreaWidth = tempScrollableAreaWidth + $(this).outerWidth(true);
					});
					
					el.data("scrollXPos", el.data("startingPosition"));
					self._trigger("movedToStartElement");
					break;
				case "last":
					el.data("scrollXPos", el.data("scrollableAreaWidth"));
					self._trigger("movedToLastElement");
					break;
				case "number":
					if(!(isNaN(elementNumber))) {					
						el.data("scrollableArea").children(o.countOnlyClass).each(function(index) {
							if(index === (elementNumber-1)) 
							{
								el.data("scrollXPos", tempScrollableAreaWidth);
							}
							tempScrollableAreaWidth = tempScrollableAreaWidth + $(this).outerWidth(true);
						});
					}
					self._trigger("movedToElementNumber", null, {"elementNumber": elementNumber});
					break;
				default:
					break;
			}
			
			el.data("scrollWrapper").scrollLeft(el.data("scrollXPos"));
			self._showHideHotSpots();
		},
		addContent: function(ajaxContentURL, addWhere)
		{
			var self = this, el = this.element;

			$.get(ajaxContentURL, function(data){
				if(addWhere === "first") {
					el.data("scrollableArea").children(":first").before(data);
				}
				else {
					el.data("scrollableArea").children(":last").after(data);
				}
				
				self.recalculateScrollableArea();
				
				self._showHideHotSpots();
			});
		},
		replaceContent: function(ajaxContentURL)
		{
			var self = this, el = this.element;
			
			el.data("scrollableArea").load(ajaxContentURL, function(){
				self.recalculateScrollableArea();
				self.moveToElement("first");
				self._showHideHotSpots();
				el.data("startingPosition", 0);
			});
		},
		recalculateScrollableArea: function() {
			
			var tempScrollableAreaWidth = 0, foundStartAtElement = false, o = this.options, el = this.element, self = this;

			el.data("scrollableArea").children(o.countOnlyClass).each(function() {
				if( (o.startAtElementId.length > 0) && (($(this).attr("id")) === o.startAtElementId) ) 
				{
					el.data("startingPosition", tempScrollableAreaWidth);
					foundStartAtElement = true;
				}
				tempScrollableAreaWidth = tempScrollableAreaWidth + $(this).outerWidth(true);
			});

			if (!(foundStartAtElement)) {
				el.data("startAtElementId", "");
			}
		
			el.data("scrollableAreaWidth", tempScrollableAreaWidth);
			el.data("scrollableArea").width(el.data("scrollableAreaWidth"));
			
			if(!(el.data("initialAjaxContentLoaded")))
			{
				if((o.autoScroll.length > 0) && !(o.hiddenOnStart) && (o.ajaxContentURL.length > 0)) {
					self.startAutoScroll();
					el.data("initialAjaxContentLoaded", true);
				}
			}
			
		},
		stopAutoScroll: function() {
			var self = this, el = this.element;
			
			clearInterval(el.data("autoScrollInterval"));
			el.data("autoScrollInterval", null);
			
			self._showHideHotSpots();
					
			self._trigger("autoScrollStopped");
			
		},
		startAutoScroll: function() {
			var self = this, el = this.element, o = this.options;
			
			self._showHideHotSpots();
			
			clearInterval(el.data("autoScrollInterval"));
			el.data("autoScrollInterval", null);
			
			self._trigger("autoScrollStarted");
			
			el.data("autoScrollInterval", setInterval(function(){

				if(!(el.data("visible")) || (el.data("scrollableAreaWidth") <= (el.data("scrollWrapper").innerWidth())))
				{				
					clearInterval(el.data("autoScrollInterval"));
					el.data("autoScrollInterval", null);
				}
				else
				{
					el.data("previousScrollLeft", el.data("scrollWrapper").scrollLeft());

					
					switch(o.autoScrollDirection)
					{
					case "right":
						el.data("scrollWrapper").scrollLeft(el.data("scrollWrapper").scrollLeft() + o.autoScrollStep);
						if(el.data("previousScrollLeft") === el.data("scrollWrapper").scrollLeft())
						{
							self._trigger("autoScrollRightLimitReached");
							clearInterval(el.data("autoScrollInterval"));
							el.data("autoScrollInterval", null);
							self._trigger("autoScrollIntervalStopped");
						}
						break;

					case "left":
						el.data("scrollWrapper").scrollLeft(el.data("scrollWrapper").scrollLeft() - o.autoScrollStep);
						if(el.data("previousScrollLeft") === el.data("scrollWrapper").scrollLeft())
						{
							self._trigger("autoScrollLeftLimitReached");
							clearInterval(el.data("autoScrollInterval"));
							el.data("autoScrollInterval", null);
							self._trigger("autoScrollIntervalStopped");
						}
						break;
						
					case "backandforth":
						if(el.data("pingPongDirection") === "right") { 
							el.data("scrollWrapper").scrollLeft(el.data("scrollWrapper").scrollLeft() + (o.autoScrollStep));
						}
						else {
							el.data("scrollWrapper").scrollLeft(el.data("scrollWrapper").scrollLeft() - (o.autoScrollStep));
						}
						
						if(el.data("previousScrollLeft") === el.data("scrollWrapper").scrollLeft())
						{
							if(el.data("pingPongDirection") === "right") 
							{
								el.data("pingPongDirection", "left");
								self._trigger("autoScrollRightLimitReached");
							}
							else 
							{
								el.data("pingPongDirection", "right");
								self._trigger("autoScrollLeftLimitReached");
							}
						}
						break;

					case "endlessloopright":
						if(el.data("getNextElementWidth"))
						{
							if((o.startAtElementId.length > 0) && (el.data("startAtElementHasNotPassed"))) {
								el.data("swapAt", $("#" + o.startAtElementId).outerWidth(true));
								el.data("startAtElementHasNotPassed", false);
							}
							else {
								el.data("swapAt", el.data("scrollableArea").children(":first").outerWidth(true));
							}
							
							el.data("getNextElementWidth", false);
						}
			
						el.data("scrollWrapper").scrollLeft(el.data("scrollWrapper").scrollLeft() + o.autoScrollStep);

						if(el.data("swapAt") <= el.data("scrollWrapper").scrollLeft())
						{ 
							el.data("swappedElement", el.data("scrollableArea").children(":first").detach());
							el.data("scrollableArea").append(el.data("swappedElement"));
							el.data("scrollWrapper").scrollLeft(el.data("scrollWrapper").scrollLeft() - el.data("swappedElement").outerWidth(true));
							el.data("getNextElementWidth", true);
						}
						break;
					case "endlessloopleft":

						if(el.data("getNextElementWidth"))
						{
							if((o.startAtElementId.length > 0) && (el.data("startAtElementHasNotPassed"))) {
								el.data("swapAt", $("#" + o.startAtElementId).outerWidth(true));
								el.data("startAtElementHasNotPassed", false);
							}
							else {
								el.data("swapAt", el.data("scrollableArea").children(":first").outerWidth(true));
							}
			
							el.data("getNextElementWidth", false);
						}
			
						el.data("scrollWrapper").scrollLeft(el.data("scrollWrapper").scrollLeft() - o.autoScrollStep);
						
						if(el.data("scrollWrapper").scrollLeft() === 0)
						{ 
							el.data("swappedElement", el.data("scrollableArea").children(":last").detach());
							el.data("scrollableArea").prepend(el.data("swappedElement"));
							el.data("scrollWrapper").scrollLeft(el.data("scrollWrapper").scrollLeft() + el.data("swappedElement").outerWidth(true));
							el.data("getNextElementWidth", true);
						}
						break;
					default:
						break;

					}
				}						
			}, o.autoScrollInterval));
		
		},
		restoreOriginalElements: function() {
			var self = this, el = this.element;
			
			el.data("scrollableArea").html(el.data("originalElements"));
			self.recalculateScrollableArea();
			self.moveToElement("first");
		},
		show: function(){
			var el = this.element;
			el.data("visible", true);
			el.show();
		},
		hide: function(){
			var el = this.element;
			el.data("visible", false);
			el.hide();
		},
		enable: function(){
			var el = this.element;
			
			el.data("enabled", true);
		},
		disable: function(){
			var el = this.element;
			
			clearInterval(el.data("autoScrollInterval"));
			clearInterval(el.data("rightScrollInterval"));
			clearInterval(el.data("leftScrollInterval"));
			clearInterval(el.data("hideHotSpotBackgroundsInterval"));
			
			el.data("enabled", false);
		},
		
		destroy: function() {
			var el = this.element;
			
			clearInterval(el.data("autoScrollInterval"));
			clearInterval(el.data("rightScrollInterval"));
			clearInterval(el.data("leftScrollInterval"));
			clearInterval(el.data("hideHotSpotBackgroundsInterval"));
			
			el.data("scrollingHotSpotRight").unbind("mouseover");
			el.data("scrollingHotSpotRight").unbind("mouseout");
			el.data("scrollingHotSpotRight").unbind("mousedown");
			
			el.data("scrollingHotSpotLeft").unbind("mouseover");
			el.data("scrollingHotSpotLeft").unbind("mouseout");	
			el.data("scrollingHotSpotLeft").unbind("mousedown");

			el.data("scrollableArea").html(el.data("originalElements"));
			
			el.data("scrollableArea").removeAttr("style");
			el.data("scrollingHotSpotRight").removeAttr("style");
			el.data("scrollingHotSpotLeft").removeAttr("style");

			el.data("scrollWrapper").scrollLeft(0);
			el.data("scrollingHotSpotLeft").removeClass("scrollingHotSpotLeftVisible");
			el.data("scrollingHotSpotRight").removeClass("scrollingHotSpotRightVisible"); 
			el.data("scrollingHotSpotRight").hide();
			el.data("scrollingHotSpotLeft").hide();
			
			$.Widget.prototype.destroy.apply(this, arguments);
			
		}
	});
})(jQuery);