157 lines
3.6 KiB
JavaScript
157 lines
3.6 KiB
JavaScript
/*!
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* Thumbnail helper for fancyBox
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* version: 1.0.4
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* @requires fancyBox v2.0 or later
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*
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* Usage:
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* $(".fancybox").fancybox({
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* thumbs: {
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* width : 50,
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* height : 50
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* }
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* });
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*
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* Options:
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* width - thumbnail width
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* height - thumbnail height
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* source - function to obtain the URL of the thumbnail image
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* position - 'top' or 'bottom'
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*
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*/
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(function ($) {
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//Shortcut for fancyBox object
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var F = $.fancybox;
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//Add helper object
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F.helpers.thumbs = {
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wrap: null,
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list: null,
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width: 0,
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//Default function to obtain the URL of the thumbnail image
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source: function (el) {
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var img;
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if ($.type(el) === 'string') {
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return el;
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}
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img = $(el).find('img');
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return img.length ? img.attr('src') : el.href;
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},
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init: function (opts) {
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var that = this,
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list,
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thumbWidth = opts.width || 50,
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thumbHeight = opts.height || 50,
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thumbSource = opts.source || this.source;
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//Build list structure
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list = '';
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for (var n = 0; n < F.group.length; n++) {
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list += '<li><a style="width:' + thumbWidth + 'px;height:' + thumbHeight + 'px;" href="javascript:jQuery.fancybox.jumpto(' + n + ');"></a></li>';
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}
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this.wrap = $('<div id="fancybox-thumbs"></div>').addClass(opts.position || 'bottom').appendTo('body');
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this.list = $('<ul>' + list + '</ul>').appendTo(this.wrap);
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//Load each thumbnail
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$.each(F.group, function (i) {
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$("<img />").load(function () {
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var width = this.width,
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height = this.height,
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widthRatio, heightRatio, parent;
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if (!that.list || !width || !height) {
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return;
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}
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//Calculate thumbnail width/height and center it
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widthRatio = width / thumbWidth;
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heightRatio = height / thumbHeight;
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parent = that.list.children().eq(i).find('a');
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if (widthRatio >= 1 && heightRatio >= 1) {
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if (widthRatio > heightRatio) {
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width = Math.floor(width / heightRatio);
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height = thumbHeight;
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} else {
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width = thumbWidth;
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height = Math.floor(height / widthRatio);
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}
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}
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$(this).css({
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width: width,
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height: height,
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top: Math.floor(thumbHeight / 2 - height / 2),
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left: Math.floor(thumbWidth / 2 - width / 2)
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});
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parent.width(thumbWidth).height(thumbHeight);
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$(this).hide().appendTo(parent).fadeIn(300);
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}).attr('src', thumbSource( F.group[ i ] ));
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});
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//Set initial width
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this.width = this.list.children().eq(0).outerWidth(true);
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this.list.width(this.width * (F.group.length + 1)).css('left', Math.floor($(window).width() * 0.5 - (F.current.index * this.width + this.width * 0.5)));
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},
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//Center list
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update: function (opts) {
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if (this.list) {
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this.list.stop(true).animate({
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'left': Math.floor($(window).width() * 0.5 - (F.current.index * this.width + this.width * 0.5))
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}, 150);
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}
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},
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beforeLoad: function (opts) {
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//Remove self if gallery do not have at least two items
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if (F.group.length < 2) {
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F.coming.helpers.thumbs = false;
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return;
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}
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//Increase bottom margin to give space for thumbs
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F.coming.margin[ opts.position === 'top' ? 0 : 2 ] = opts.height + 30;
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},
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afterShow: function (opts) {
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//Check if exists and create or update list
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if (this.list) {
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this.update(opts);
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} else {
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this.init(opts);
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}
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//Set active element
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this.list.children().removeClass('active').eq(F.current.index).addClass('active');
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},
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onUpdate: function () {
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this.update();
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},
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beforeClose: function () {
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if (this.wrap) {
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this.wrap.remove();
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}
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this.wrap = null;
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this.list = null;
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this.width = 0;
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}
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}
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}(jQuery)); |