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|
/*
* jQuery Carousel Plugin v1.0
* http://richardscarrott.co.uk/posts/view/jquery-carousel-plugin
*
* Copyright (c) 2010 Richard Scarrott
*
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* Requires jQuery v1.4+
*
*/
// prototypal inheritance
if (typeof Object.create !== 'function') {
Object.create = function (o) {
function F() {}
F.prototype = o;
return new F();
};
}
(function($) {
// ie alias
var headache = $.browser.msie && $.browser.version.substr(0,1)<9;
// carousel
var Carousel = {
settings: {
itemsPerPage: 5,
itemsPerTransition: 5,
noOfRows: 1,
nextPrevLinks: true,
speed: 'normal',
easing: 'swing'
},
init: function(el, options) {
if (!el.length) {return false;}
this.options = $.extend({}, this.settings, options);
this.itemIndex = 0;
//this.itemIndex = 1;
this.carousel_wrapper = el;
this.runner = this.carousel_wrapper.find('ul');
this.items = this.runner.children('li');
this.noOfItems = this.items.length;
this.setRunnerWidth();
if (this.noOfItems <= this.options.itemsPerPage) {return false;} // bail if there are too few items to paginate
this.insertMask();
this.noOfPages = Math.ceil((this.noOfItems - this.options.itemsPerPage) / this.options.itemsPerTransition) + 1;
if (this.options.nextPrevLinks) {this.insertNextPrevLinks();}
this.updateBtnStyles();
},
insertMask: function() {
this.runner.wrap('<div class="mask" />');
this.mask = this.carousel_wrapper.find('div.mask');
// set mask height so items can be of varying height
var maskHeight = this.runner.outerHeight(true);
this.mask = this.carousel_wrapper.find('div.mask');
this.mask.height(maskHeight);
},
setRunnerWidth: function() {
this.noOfItems = Math.round(this.noOfItems / this.options.noOfRows);
var width = this.items.outerWidth(true) * this.noOfItems;
this.runner.width(width);
},
insertNextPrevLinks: function() {
this.prevLink = $('<a href="#" class="prev"></a>')
.bind('click.carousel', $.proxy(this, 'prevItem'))
.prependTo(this.carousel_wrapper);
this.nextLink = $('<a href="#" class="next"></a>')
.bind('click.carousel', $.proxy(this, 'nextItem'))
.appendTo(this.carousel_wrapper);
},
nextItem: function() {
this.itemIndex = this.itemIndex + this.options.itemsPerTransition;
this.animate();
return false;
},
prevItem: function() {
this.itemIndex = this.itemIndex - this.options.itemsPerTransition;
this.animate();
return false;
},
updateBtnStyles: function() {
if (this.options.nextPrevLinks) {
this.nextLink
.add(this.prevLink)
.removeClass('disabled');
if (this.itemIndex === (this.noOfItems - this.options.itemsPerPage)) {
this.nextLink.addClass('disabled');
}
else if (this.itemIndex === 0) {
this.prevLink.addClass('disabled');
}
}
},
animate: function() {
var nextItem, pos;
// check whether there are enough items to animate to
if (this.itemIndex > (this.noOfItems - this.options.itemsPerPage)) {
this.itemIndex = this.noOfItems - this.options.itemsPerPage; // go to last panel - items per transition
}
if (this.itemIndex < 0) {
this.itemIndex = 0; // go to first
}
nextItem = this.items.eq(this.itemIndex);
pos = nextItem.position();
if (headache) {
this.runner
.stop()
.animate({left: -pos.left}, this.options.speed, this.options.easing);
}
else {
this.mask
.stop()
.animate({scrollLeft: pos.left}, this.options.speed, this.options.easing);
}
this.updateBtnStyles();
}
};
// bridge
$.fn.carousel = function(options) {
return this.each(function() {
var obj = Object.create(Carousel);
obj.init($(this), options);
$.data(this, 'carousel', obj);
});
};
})(jQuery); |
