// Easing equation, borrowed from jQuery easing plugin
// http://gsgd.co.uk/sandbox/jquery/easing/
jQuery.easing.easeOutQuart = function (x, t, b, c, d) {
	return -c * ((t=t/d-1)*t*t*t - 1) + b;
};

jQuery(function( $ ){

	/**
	 * Most jQuery.serialScroll's settings, actually belong to jQuery.ScrollTo, check it's demo for an example of each option.
	 * @see http://flesler.demos.com/jquery/scrollTo/
	 * You can use EVERY single setting of jQuery.ScrollTo, in the settings hash you send to jQuery.serialScroll.
	 */
	
	/**
	 * The plugin binds 6 events to the container to allow external manipulation.
	 * prev, next, goto, start, stop and notify
	 * You use them like this: $(your_container).trigger('next'), $(your_container).trigger('goto', [5]) (0-based index).
	 * If for some odd reason, the element already has any of these events bound, trigger it with the namespace.
	 */		
	
	/**
	 * IMPORTANT: this call to the plugin specifies ALL the settings (plus some of jQuery.ScrollTo)
	 * This is done so you can see them. You DON'T need to specify the commented ones.
	 * A 'target' is specified, that means that #screen is the context for target, prev, next and navigation.
	 */
	
	function init() {
		$('#screen').serialScroll({
			target:'#sections',
			items:'li', // Selector to the items ( relative to the matched elements, '#sections' in this case )
			prev:'img.prev',// Selector to the 'prev' button (absolute!, meaning it's relative to the document)
			next:'.next',// Selector to the 'next' button (absolute too)
			axis:'x',// The default is 'y' scroll on both ways
			navigation:'#navigation li a',
			duration:1200,// Length of the animation (if you scroll 2 axes and use queue, then each axis take half this time)
			force:true, // Force a scroll to the element specified by 'start' (some browsers don't reset on refreshes)
			
			//queue:false,// We scroll on both axes, scroll both at the same time.
			//event:'click',// On which event to react (click is the default, you probably won't need to specify it)
			//stop:false,// Each click will stop any previous animations of the target. (false by default)
			//lock:true, // Ignore events if already animating (true by default)		
			//start: 0, // On which element (index) to begin ( 0 is the default, redundant in this case )		
			cycle:false,// Cycle endlessly ( constant velocity, true is the default )
			//step:1, // How many items to scroll each time ( 1 is the default, no need to specify )
			//jump:false, // If true, items become clickable (or w/e 'event' is, and when activated, the pane scrolls to them)
			//lazy:false,// (default) if true, the plugin looks for the items on each event(allows AJAX or JS content, or reordering)
			//interval:1000, // It's the number of milliseconds to automatically go to the next
			constant:false, // constant speed
			easing: "easeOutQuart",
			onBefore:function( e, elem, $pane, $items, pos ){
				//CUSTOM: OPACITY50-KLASSEN-EVENTS:
				$('#pics li').addClass('opacity50');
				$(elem).removeClass('opacity50'); //Transparenzklassse des nächsten Elemntes entfernen
				$('#pics li').addClass('next');//alle mit Next klasse versehen
				$(elem).removeClass('next'); //entfernt "next" des aktiven Elements klasse

				//$(elem).unbind();//entfernt JS-Event des  aktiven Elements -> eventuell benötigt für anklickbare Elemente?

				//NAVIGATION:
				$("#navigation ul li").addClass('opacity50');//Transparenzklasse für Elemente in der Navi setzen.
				$("#navigation ul li:nth-child("+(pos+1)+")").removeClass('opacity50');//Transparenzklasse für Element in der Navi Entfernen.
				
				//FADE-Funktionen
				$("#navigation ul li:nth-child("+(pos+1)+")").fadeTo('fast', 1);//Transparenz des aktiven Elements in der Navi entfernen
				$(elem).fadeTo('slow', 1);//Transparenz des nächsten Elementes entfernen
				
				/**
				 * 'this' is the triggered element 
				 * e is the event object
				 * elem is the element we'll be scrolling to
				 * $pane is the element being scrolled
				 * $items is the items collection at this moment
				 * pos is the position of elem in the collection
				 * if it returns false, the event will be ignored
				 */
				 //those arguments with a $ are jqueryfied, elem isn't.
				e.preventDefault();
				if ( this.blur ) this.blur();
				$('.opacity50').fadeTo(400, 0.3);
			},
			onAfter:function( elem ){
				//'this' is the element being scrolled ($pane) not jqueryfied			 
				 //initial-fades
				$('.opacity50').fadeTo(100, 0.3);
			}
		});	
		// alert("initialized...");
	}
	init();	
	
});