"

From 2011.igem.org

(function($) { var aux = { // navigates left / right navigate : function( dir, $el, $wrapper, opts, cache ) {

var scroll = opts.scroll, factor = 1, idxClicked = 0;

if( cache.expanded ) { scroll = 1; // scroll is always 1 in full mode factor = 3; // the width of the expanded item will be 3 times bigger than 1 collapsed item idxClicked = cache.idxClicked; // the index of the clicked item }

// clone the elements on the right / left and append / prepend them according to dir and scroll if( dir === 1 ) { $wrapper.find('div.ca-item:lt(' + scroll + ')').each(function(i) { $(this).clone(true).css( 'left', ( cache.totalItems - idxClicked + i ) * cache.itemW * factor + 'px' ).appendTo( $wrapper ); }); } else { var $first = $wrapper.children().eq(0);

$wrapper.find('div.ca-item:gt(' + ( cache.totalItems - 1 - scroll ) + ')').each(function(i) { // insert before $first so they stay in the right order $(this).clone(true).css( 'left', - ( scroll - i + idxClicked ) * cache.itemW * factor + 'px' ).insertBefore( $first ); }); }

// animate the left of each item // the calculations are dependent on dir and on the cache.expanded value $wrapper.find('div.ca-item').each(function(i) { var $item = $(this); $item.stop().animate({ left : ( dir === 1 ) ? '-=' + ( cache.itemW * factor * scroll ) + 'px' : '+=' + ( cache.itemW * factor * scroll ) + 'px' }, opts.sliderSpeed, opts.sliderEasing, function() { if( ( dir === 1 && $item.position().left < - idxClicked * cache.itemW * factor ) || ( dir === -1 && $item.position().left > ( ( cache.totalItems - 1 - idxClicked ) * cache.itemW * factor ) ) ) { // remove the item that was cloned $item.remove(); } cache.isAnimating = false; }); });

}, // opens an item (animation) -> opens all the others openItem : function( $wrapper, $item, opts, cache ) { cache.idxClicked = $item.index(); // the item's position (1, 2, or 3) on the viewport (the visible items) cache.winpos = aux.getWinPos( $item.position().left, cache ); $wrapper.find('div.ca-item').not( $item ).hide(); $item.find('div.ca-content-wrapper').css( 'left', cache.itemW + 'px' ).stop().animate({ width : cache.itemW * 2 + 'px', left : cache.itemW + 'px' }, opts.itemSpeed, opts.itemEasing) .end() .stop() .animate({ left : '0px' }, opts.itemSpeed, opts.itemEasing, function() { cache.isAnimating = false; cache.expanded = true;

aux.openItems( $wrapper, $item, opts, cache ); });

}, // opens all the items openItems : function( $wrapper, $openedItem, opts, cache ) { var openedIdx = $openedItem.index();

$wrapper.find('div.ca-item').each(function(i) { var $item = $(this), idx = $item.index();

if( idx !== openedIdx ) { $item.css( 'left', - ( openedIdx - idx ) * ( cache.itemW * 3 ) + 'px' ).show().find('div.ca-content-wrapper').css({ left : cache.itemW + 'px', width : cache.itemW * 2 + 'px' });

// hide more link aux.toggleMore( $item, false ); } }); }, // show / hide the item's more button toggleMore : function( $item, show ) { ( show ) ? $item.find('a.ca-more').show() : $item.find('a.ca-more').hide(); }, // close all the items // the current one is animated closeItems : function( $wrapper, $openedItem, opts, cache ) { var openedIdx = $openedItem.index();

$openedItem.find('div.ca-content-wrapper').stop().animate({ width : '0px' }, opts.itemSpeed, opts.itemEasing) .end() .stop() .animate({ left : cache.itemW * ( cache.winpos - 1 ) + 'px' }, opts.itemSpeed, opts.itemEasing, function() { cache.isAnimating = false; cache.expanded = false; });

// show more link aux.toggleMore( $openedItem, true );

$wrapper.find('div.ca-item').each(function(i) { var $item = $(this), idx = $item.index();

if( idx !== openedIdx ) { $item.find('div.ca-content-wrapper').css({ width : '0px' }) .end() .css( 'left', ( ( cache.winpos - 1 ) - ( openedIdx - idx ) ) * cache.itemW + 'px' ) .show();

// show more link aux.toggleMore( $item, true ); } }); }, // gets the item's position (1, 2, or 3) on the viewport (the visible items) // val is the left of the item getWinPos : function( val, cache ) { switch( val ) { case 0 : return 1; break; case cache.itemW : return 2; break; case cache.itemW * 2 : return 3; break; } } }, methods = { init : function( options ) {

if( this.length ) {

var settings = { sliderSpeed : 500, // speed for the sliding animation sliderEasing : 'easeOutExpo',// easing for the sliding animation itemSpeed : 500, // speed for the item animation (open / close) itemEasing : 'easeOutExpo',// easing for the item animation (open / close) scroll : 1 // number of items to scroll at a time };

return this.each(function() {

// if options exist, lets merge them with our default settings if ( options ) { $.extend( settings, options ); }

var $el = $(this), $wrapper = $el.find('div.ca-wrapper'), $items = $wrapper.children('div.ca-item'), cache = {};

// save the with of one item cache.itemW = $items.width(); // save the number of total items cache.totalItems = $items.length;

// add navigation buttons if( cache.totalItems > 3 )

$el.prepend('')

// control the scroll value if( settings.scroll < 1 ) settings.scroll = 1; else if( settings.scroll > 3 ) settings.scroll = 3;

var $navPrev = $el.find('span.ca-nav-prev'), $navNext = $el.find('span.ca-nav-next');

// hide the items except the first 3 $wrapper.css( 'overflow', 'hidden' );

// the items will have position absolute // calculate the left of each item $items.each(function(i) { $(this).css({ position : 'absolute', left : i * cache.itemW + 'px' }); });

// click to open the item(s) $el.find('a.ca-more').live('click.contentcarousel', function( event ) { if( cache.isAnimating ) return false; cache.isAnimating = true; $(this).hide(); var $item = $(this).closest('div.ca-item'); aux.openItem( $wrapper, $item, settings, cache ); return false; });

// click to close the item(s) $el.find('a.ca-close').live('click.contentcarousel', function( event ) { if( cache.isAnimating ) return false; cache.isAnimating = true; var $item = $(this).closest('div.ca-item'); aux.closeItems( $wrapper, $item, settings, cache ); return false; });

// navigate left $navPrev.bind('click.contentcarousel', function( event ) { if( cache.isAnimating ) return false; cache.isAnimating = true; aux.navigate( -1, $el, $wrapper, settings, cache ); });

// navigate right $navNext.bind('click.contentcarousel', function( event ) { if( cache.isAnimating ) return false; cache.isAnimating = true; aux.navigate( 1, $el, $wrapper, settings, cache ); });

// adds events to the mouse $el.bind('mousewheel.contentcarousel', function(e, delta) { if(delta > 0) { if( cache.isAnimating ) return false; cache.isAnimating = true; aux.navigate( -1, $el, $wrapper, settings, cache ); } else { if( cache.isAnimating ) return false; cache.isAnimating = true; aux.navigate( 1, $el, $wrapper, settings, cache ); } return false; });

}); } } };

$.fn.contentcarousel = function(method) { if ( methods[method] ) { return methods[method].apply( this, Array.prototype.slice.call( arguments, 1 )); } else if ( typeof method === 'object' || ! method ) { return methods.init.apply( this, arguments ); } else { $.error( 'Method ' + method + ' does not exist on jQuery.contentcarousel' ); } };

})(jQuery);