458 lines
9.6 KiB
JavaScript
458 lines
9.6 KiB
JavaScript
/**
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* jquery.scrollable 1.0.2. Put your HTML scroll.
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*
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* Copyright (c) 2009 Tero Piirainen
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* http://flowplayer.org/tools/scrollable.html
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*
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* Dual licensed under MIT and GPL 2+ licenses
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* http://www.opensource.org/licenses
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*
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* Launch : March 2008
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* Version : 1.0.2 - Tue Feb 24 2009 10:52:08 GMT-0000 (GMT+00:00)
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*/
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(function($) {
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function fireEvent(opts, name, self, arg) {
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var fn = opts[name];
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if ($.isFunction(fn)) {
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try {
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return fn.call(self, arg);
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} catch (error) {
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if (opts.alert) {
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alert("Error calling scrollable." + name + ": " + error);
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} else {
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throw error;
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}
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return false;
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}
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}
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return true;
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}
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var current = null;
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// constructor
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function Scrollable(root, conf) {
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// current instance
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var self = this;
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if (!current) { current = self; }
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// horizontal flag
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var horizontal = !conf.vertical;
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// wrap (root elements for items)
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var wrap = $(conf.items, root);
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// current index
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var index = 0;
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// get handle to navigational elements
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var navi = root.siblings(conf.navi).eq(0);
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var prev = root.siblings(conf.prev).eq(0);
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var next = root.siblings(conf.next).eq(0);
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var prevPage = root.siblings(conf.prevPage).eq(0);
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var nextPage = root.siblings(conf.nextPage).eq(0);
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// methods
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$.extend(self, {
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getVersion: function() {
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return [1, 0, 1];
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},
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getIndex: function() {
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return index;
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},
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getConf: function() {
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return conf;
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},
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getSize: function() {
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return self.getItems().size();
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},
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getPageAmount: function() {
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return Math.ceil(this.getSize() / conf.size);
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},
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getPageIndex: function() {
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return Math.ceil(index / conf.size);
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},
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getRoot: function() {
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return root;
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},
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getItemWrap: function() {
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return wrap;
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},
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getItems: function() {
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return wrap.children();
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},
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/* all seeking functions depend on this */
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seekTo: function(i, time, fn) {
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// default speed
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time = time || conf.speed;
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// function given as second argument
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if ($.isFunction(time)) {
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fn = time;
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time = conf.speed;
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}
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if (i < 0) { i = 0; }
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if (i > self.getSize() - conf.size) { return self; }
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var item = self.getItems().eq(i);
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if (!item.length) { return self; }
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// onBeforeSeek
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if (fireEvent(conf, "onBeforeSeek", self, i) === false) {
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return self;
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}
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if (horizontal) {
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var left = -(item.outerWidth(true) * i);
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wrap.animate({left: left}, time, conf.easing, fn ? function() { fn.call(self); } : null);
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} else {
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var top = -(item.outerHeight(true) * i); // wrap.offset().top - item.offset().top;
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wrap.animate({top: top}, time, conf.easing, fn ? function() { fn.call(self); } : null);
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}
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// navi status update
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if (navi.length) {
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var klass = conf.activeClass;
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var page = Math.ceil(i / conf.size);
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page = Math.min(page, navi.children().length - 1);
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navi.children().removeClass(klass).eq(page).addClass(klass);
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}
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// prev buttons disabled flag
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if (i === 0) {
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prev.add(prevPage).addClass(conf.disabledClass);
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} else {
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prev.add(prevPage).removeClass(conf.disabledClass);
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}
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// next buttons disabled flag
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if (i >= self.getSize() - conf.size) {
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next.add(nextPage).addClass(conf.disabledClass);
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} else {
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next.add(nextPage).removeClass(conf.disabledClass);
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}
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current = self;
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index = i;
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// onSeek after index being updated
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fireEvent(conf, "onSeek", self, i);
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return self;
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},
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move: function(offset, time, fn) {
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var to = index + offset;
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if (conf.loop && to > (self.getSize() - conf.size)) {
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to = 0;
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}
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return this.seekTo(to, time, fn);
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},
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next: function(time, fn) {
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return this.move(1, time, fn);
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},
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prev: function(time, fn) {
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return this.move(-1, time, fn);
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},
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movePage: function(offset, time, fn) {
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return this.move(conf.size * offset, time, fn);
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},
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setPage: function(page, time, fn) {
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var size = conf.size;
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var index = size * page;
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var lastPage = index + size >= this.getSize();
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if (lastPage) {
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index = this.getSize() - conf.size;
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}
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return this.seekTo(index, time, fn);
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},
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prevPage: function(time, fn) {
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return this.setPage(this.getPageIndex() - 1, time, fn);
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},
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nextPage: function(time, fn) {
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return this.setPage(this.getPageIndex() + 1, time, fn);
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},
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begin: function(time, fn) {
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return this.seekTo(0, time, fn);
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},
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end: function(time, fn) {
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return this.seekTo(this.getSize() - conf.size, time, fn);
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},
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reload: function() {
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return load();
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},
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click: function(index, time, fn) {
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var item = self.getItems().eq(index);
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var klass = conf.activeClass;
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if (!item.hasClass(klass) && (index >= 0 || index < this.getSize())) {
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self.getItems().removeClass(klass);
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item.addClass(klass);
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var delta = Math.floor(conf.size / 2);
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var to = index - delta;
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// next to last item must work
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if (to > self.getSize() - conf.size) { to--; }
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if (to !== index) {
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return this.seekTo(to, time, fn);
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}
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}
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return self;
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}
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});
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// mousewheel
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if ($.isFunction($.fn.mousewheel)) {
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root.bind("mousewheel.scrollable", function(e, delta) {
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// opera goes to opposite direction
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var step = $.browser.opera ? 1 : -1;
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self.move(delta > 0 ? step : -step, 50);
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return false;
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});
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}
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// prev button
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prev.addClass(conf.disabledClass).click(function() {
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self.prev();
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});
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// next button
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next.click(function() {
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self.next();
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});
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// prev page button
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nextPage.click(function() {
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self.nextPage();
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});
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// next page button
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prevPage.addClass(conf.disabledClass).click(function() {
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self.prevPage();
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});
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// keyboard
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if (conf.keyboard) {
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// unfortunately window.keypress does not work on IE.
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$(window).unbind("keypress.scrollable").bind("keypress.scrollable", function(evt) {
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var el = current;
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if (!el) { return; }
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if (horizontal && (evt.keyCode == 37 || evt.keyCode == 39)) {
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el.move(evt.keyCode == 37 ? -1 : 1);
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return evt.preventDefault();
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}
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if (!horizontal && (evt.keyCode == 38 || evt.keyCode == 40)) {
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el.move(evt.keyCode == 38 ? -1 : 1);
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return evt.preventDefault();
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}
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return true;
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});
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}
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// navi
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function load() {
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navi.each(function() {
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var nav = $(this);
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// generate new entries
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if (nav.is(":empty") || nav.data("me") == self) {
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nav.empty();
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nav.data("me", self);
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for (var i = 0; i < self.getPageAmount(); i++) {
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var item = $("<" + conf.naviItem + "/>").attr("href", i).click(function(e) {
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var el = $(this);
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el.parent().children().removeClass(conf.activeClass);
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el.addClass(conf.activeClass);
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self.setPage(el.attr("href"));
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return e.preventDefault();
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});
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if (i === 0) { item.addClass(conf.activeClass); }
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nav.append(item);
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}
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// assign onClick events to existing entries
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} else {
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// find a entries first -> syntaxically correct
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var els = nav.children();
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els.each(function(i) {
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var item = $(this);
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item.attr("href", i);
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if (i === 0) { item.addClass(conf.activeClass); }
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item.click(function() {
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nav.find("." + conf.activeClass).removeClass(conf.activeClass);
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item.addClass(conf.activeClass);
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self.setPage(item.attr("href"));
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});
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});
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}
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});
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// item.click()
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if (conf.clickable) {
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self.getItems().each(function(index, arg) {
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var el = $(this);
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if (!el.data("set")) {
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el.bind("click.scrollable", function() {
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self.click(index);
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});
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el.data("set", true);
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}
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});
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}
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// hover
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if (conf.hoverClass) {
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self.getItems().hover(function() {
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$(this).addClass(conf.hoverClass);
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}, function() {
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$(this).removeClass(conf.hoverClass);
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});
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}
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return self;
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}
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load();
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// interval stuff
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var timer = null;
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function setTimer() {
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timer = setInterval(function() {
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self.next();
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}, conf.interval);
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}
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if (conf.interval > 0) {
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root.hover(function() {
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clearInterval(timer);
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}, function() {
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setTimer();
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});
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setTimer();
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}
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}
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// jQuery plugin implementation
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jQuery.prototype.scrollable = function(conf) {
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// already constructed --> return API
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var api = this.eq(typeof conf == 'number' ? conf : 0).data("scrollable");
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if (api) { return api; }
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var opts = {
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// basics
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size: 5,
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vertical:false,
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clickable: true,
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loop: false,
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interval: 0,
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speed: 400,
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keyboard: true,
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// other
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activeClass:'active',
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disabledClass: 'disabled',
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hoverClass: null,
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easing: 'swing',
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// navigational elements
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items: '.items',
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prev: '.prev',
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next: '.next',
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prevPage: '.prevPage',
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nextPage: '.nextPage',
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navi: '.navi',
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naviItem: 'a',
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// callbacks
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onBeforeSeek: null,
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onSeek: null,
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alert: true
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};
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$.extend(opts, conf);
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this.each(function() {
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var el = new Scrollable($(this), opts);
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$(this).data("scrollable", el);
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});
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return this;
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};
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})(jQuery);
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