// 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.

	 */

	$('#header3').serialScroll({

		target:'#sections',

		items:'li', // Selector to the items ( relative to the matched elements, '#sections' in this case )

		prev:'div.prev',// Selector to the 'prev' button (absolute!, meaning it's relative to the document)

		next:'div.next',// Selector to the 'next' button (absolute too)

		axis:'xy',// The default is 'y' scroll on both ways

		navigation:'#navigation li a',

		duration:700,// 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:true,// 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:8000, // It's the number of milliseconds to automatically go to the next

		//constant:true, // constant speed

		

		onBefore:function( e, elem, $pane, $items, pos ){

			/**

			 * '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();

		},

		onAfter:function( elem ){

			//'this' is the element being scrolled ($pane) not jqueryfied

		}

	});

	

	/**

	 * No need to have only one element in view, you can use it for slideshows or similar.

	 * In this case, clicking the images, scrolls to them.

	 * No target in this case, so the selectors are absolute.

	 */

	

	$('#slideshow').serialScroll({

		items:'li',

		prev:'#screen2 a.prev',

		next:'#screen2 a.next',

		offset:-230, //when scrolling to photo, stop 230 before reaching it (from the left)

		start:1, //as we are centering it, start at the 2nd

		duration:1200,

		force:true,

		stop:true,

		lock:false,

		cycle:false, //don't pull back once you reach the end

		easing:'easeOutQuart', //use this easing equation for a funny effect

		jump: true //click on the images to scroll to them

	});

	

	/**

	 * The call below, is just to show that you are not restricted to prev/next buttons

	 * In this case, the plugin will react to a custom event on the container

	 * You can trigger the event from the outside.

	 */

	

	var $news = $('#news-ticker');//we'll re use it a lot, so better save it to a var.

	$news.serialScroll({

		items:'div',

		duration:2000,

		force:true,

		axis:'y',

		easing:'linear',

		lazy:true,// NOTE: it's set to true, meaning you can add/remove/reorder items and the changes are taken into account.

		interval:1, // yeah! I now added auto-scrolling

		step:2 // scroll 2 news each time

	});	

	

	/**

	 * The following you don't need to see, is just for the "Add 2 Items" and "Shuffle"" buttons

	 * These exemplify the use of the option 'lazy'.

	 */

	$('#add-news').click(function(){

		var 

			$items = $news.find('div'),

			num = $items.length + 1;

			

		$items.slice(-2).clone().find('h4').each(function(i){

			$(this).text( 'News ' + (num + i) );

		}).end().appendTo($news);

	});

	$('#shuffle-news').click(function(){//don't shuffle the first, don't wanna deal with css

		var shuffled = $news.find('div').get().slice(1).sort(function(){

			return Math.round(Math.random())-0.5;//just a random number between -0.5 and 0.5

		});

		$(shuffled).appendTo($news);//add them all reordered

	});

});