查看文件: jquery.bxslider.js
大小: 50.7 KB
类型: application/javascript
/** * BxSlider v4.1.2 - Fully loaded, responsive content slider * http://bxslider.com * * Copyright 2014, Steven Wanderski - http://stevenwanderski.com - http://bxcreative.com * Written while drinking Belgian ales and listening to jazz * * Released under the MIT license - http://opensource.org/licenses/MIT */ ;(function($){ var plugin = {}; var defaults = { // GENERAL mode: 'horizontal', slideSelector: '', infiniteLoop: true, hideControlOnEnd: false, speed: 500, easing: null, slideMargin: 0, startSlide: 0, randomStart: false, captions: false, ticker: false, tickerHover: false, adaptiveHeight: false, adaptiveHeightSpeed: 500, video: false, useCSS: true, preloadImages: 'visible', responsive: true, slideZIndex: 50, wrapperClass: 'bx-wrapper', // TOUCH touchEnabled: true, swipeThreshold: 50, oneToOneTouch: true, preventDefaultSwipeX: true, preventDefaultSwipeY: false, // PAGER pager: true, pagerType: 'full', pagerShortSeparator: ' / ', pagerSelector: null, buildPager: null, pagerCustom: null, // CONTROLS controls: true, nextText: 'Next', prevText: 'Prev', nextSelector: null, prevSelector: null, autoControls: false, startText: 'Start', stopText: 'Stop', autoControlsCombine: false, autoControlsSelector: null, // AUTO auto: false, pause: 4000, autoStart: true, autoDirection: 'next', autoHover: false, autoDelay: 0, autoSlideForOnePage: false, // CAROUSEL minSlides: 1, maxSlides: 1, moveSlides: 0, slideWidth: 0, // CALLBACKS onSliderLoad: function() {}, onSlideBefore: function() {}, onSlideAfter: function() {}, onSlideNext: function() {}, onSlidePrev: function() {}, onSliderResize: function() {} } $.fn.bxSlider = function(options){ if(this.length == 0) return this; // support mutltiple elements if(this.length > 1){ this.each(function(){$(this).bxSlider(options)}); return this; } // create a namespace to be used throughout the plugin var slider = {}; // set a reference to our slider element var el = this; plugin.el = this; /** * Makes slideshow responsive */ // first get the original window dimens (thanks alot IE) var windowWidth = $(window).width(); var windowHeight = $(window).height(); /** * =================================================================================== * = PRIVATE FUNCTIONS * =================================================================================== */ /** * Initializes namespace settings to be used throughout plugin */ var init = function(){ // merge user-supplied options with the defaults slider.settings = $.extend({}, defaults, options); // parse slideWidth setting slider.settings.slideWidth = parseInt(slider.settings.slideWidth); // store the original children slider.children = el.children(slider.settings.slideSelector); // check if actual number of slides is less than minSlides / maxSlides if(slider.children.length < slider.settings.minSlides) slider.settings.minSlides = slider.children.length; if(slider.children.length < slider.settings.maxSlides) slider.settings.maxSlides = slider.children.length; // if random start, set the startSlide setting to random number if(slider.settings.randomStart) slider.settings.startSlide = Math.floor(Math.random() * slider.children.length); // store active slide information slider.active = { index: slider.settings.startSlide } // store if the slider is in carousel mode (displaying / moving multiple slides) slider.carousel = slider.settings.minSlides > 1 || slider.settings.maxSlides > 1; // if carousel, force preloadImages = 'all' if(slider.carousel) slider.settings.preloadImages = 'all'; // calculate the min / max width thresholds based on min / max number of slides // used to setup and update carousel slides dimensions slider.minThreshold = (slider.settings.minSlides * slider.settings.slideWidth) + ((slider.settings.minSlides - 1) * slider.settings.slideMargin); slider.maxThreshold = (slider.settings.maxSlides * slider.settings.slideWidth) + ((slider.settings.maxSlides - 1) * slider.settings.slideMargin); // store the current state of the slider (if currently animating, working is true) slider.working = false; // initialize the controls object slider.controls = {}; // initialize an auto interval slider.interval = null; // determine which property to use for transitions slider.animProp = slider.settings.mode == 'vertical' ? 'top' : 'left'; // determine if hardware acceleration can be used slider.usingCSS = slider.settings.useCSS && slider.settings.mode != 'fade' && (function(){ // create our test div element var div = document.createElement('div'); // css transition properties var props = ['WebkitPerspective', 'MozPerspective', 'OPerspective', 'msPerspective']; // test for each property for(var i in props){ if(div.style[props[i]] !== undefined){ slider.cssPrefix = props[i].replace('Perspective', '').toLowerCase(); slider.animProp = '-' + slider.cssPrefix + '-transform'; return true; } } return false; }()); // if vertical mode always make maxSlides and minSlides equal if(slider.settings.mode == 'vertical') slider.settings.maxSlides = slider.settings.minSlides; // save original style data el.data("origStyle", el.attr("style")); el.children(slider.settings.slideSelector).each(function() { $(this).data("origStyle", $(this).attr("style")); }); // perform all DOM / CSS modifications setup(); } /** * Performs all DOM and CSS modifications */ var setup = function(){ // wrap el in a wrapper el.wrap('<div class="' + slider.settings.wrapperClass + '"><div class="bx-viewport"></div></div>'); // store a namspace reference to .bx-viewport slider.viewport = el.parent(); // add a loading div to display while images are loading slider.loader = $('<div class="bx-loading" />'); slider.viewport.prepend(slider.loader); // set el to a massive width, to hold any needed slides // also strip any margin and padding from el el.css({ width: slider.settings.mode == 'horizontal' ? (slider.children.length * 100 + 215) + '%' : 'auto', position: 'relative' }); // if using CSS, add the easing property if(slider.usingCSS && slider.settings.easing){ el.css('-' + slider.cssPrefix + '-transition-timing-function', slider.settings.easing); // if not using CSS and no easing value was supplied, use the default JS animation easing (swing) }else if(!slider.settings.easing){ slider.settings.easing = 'swing'; } var slidesShowing = getNumberSlidesShowing(); // make modifications to the viewport (.bx-viewport) slider.viewport.css({ width: '100%', overflow: 'hidden', position: 'relative' }); slider.viewport.parent().css({ maxWidth: getViewportMaxWidth() }); // make modification to the wrapper (.bx-wrapper) if(!slider.settings.pager) { slider.viewport.parent().css({ margin: '0 auto 0px' }); } // apply css to all slider children slider.children.css({ 'float': slider.settings.mode == 'horizontal' ? 'left' : 'none', listStyle: 'none', position: 'relative' }); // apply the calculated width after the float is applied to prevent scrollbar interference slider.children.css('width', getSlideWidth()); // if slideMargin is supplied, add the css if(slider.settings.mode == 'horizontal' && slider.settings.slideMargin > 0) slider.children.css('marginRight', slider.settings.slideMargin); if(slider.settings.mode == 'vertical' && slider.settings.slideMargin > 0) slider.children.css('marginBottom', slider.settings.slideMargin); // if "fade" mode, add positioning and z-index CSS if(slider.settings.mode == 'fade'){ slider.children.css({ position: 'absolute', zIndex: 0, display: 'none' }); // prepare the z-index on the showing element slider.children.eq(slider.settings.startSlide).css({zIndex: slider.settings.slideZIndex, display: 'block'}); } // create an element to contain all slider controls (pager, start / stop, etc) slider.controls.el = $('<div class="bx-controls" />'); // if captions are requested, add them if(slider.settings.captions) appendCaptions(); // check if startSlide is last slide slider.active.last = slider.settings.startSlide == getPagerQty() - 1; // if video is true, set up the fitVids plugin if(slider.settings.video) el.fitVids(); // set the default preload selector (visible) var preloadSelector = slider.children.eq(slider.settings.startSlide); if (slider.settings.preloadImages == "all") preloadSelector = slider.children; // only check for control addition if not in "ticker" mode if(!slider.settings.ticker){ // if pager is requested, add it if(slider.settings.pager) appendPager(); // if controls are requested, add them if(slider.settings.controls) appendControls(); // if auto is true, and auto controls are requested, add them if(slider.settings.auto && slider.settings.autoControls) appendControlsAuto(); // if any control option is requested, add the controls wrapper if(slider.settings.controls || slider.settings.autoControls || slider.settings.pager) slider.viewport.after(slider.controls.el); // if ticker mode, do not allow a pager }else{ slider.settings.pager = false; } // preload all images, then perform final DOM / CSS modifications that depend on images being loaded loadElements(preloadSelector, start); } var loadElements = function(selector, callback){ var total = selector.find('img, iframe').length; if (total == 0){ callback(); return; } var count = 0; selector.find('img, iframe').each(function(){ $(this).one('load', function() { if(++count == total) callback(); }).each(function() { if(this.complete) $(this).load(); }); }); } /** * Start the slider */ var start = function(){ // if infinite loop, prepare additional slides if(slider.settings.infiniteLoop && slider.settings.mode != 'fade' && !slider.settings.ticker){ var slice = slider.settings.mode == 'vertical' ? slider.settings.minSlides : slider.settings.maxSlides; var sliceAppend = slider.children.slice(0, slice).clone().addClass('bx-clone'); var slicePrepend = slider.children.slice(-slice).clone().addClass('bx-clone'); el.append(sliceAppend).prepend(slicePrepend); } // remove the loading DOM element slider.loader.remove(); // set the left / top position of "el" setSlidePosition(); // if "vertical" mode, always use adaptiveHeight to prevent odd behavior if (slider.settings.mode == 'vertical') slider.settings.adaptiveHeight = true; // set the viewport height slider.viewport.height(getViewportHeight()); // make sure everything is positioned just right (same as a window resize) el.redrawSlider(); // onSliderLoad callback slider.settings.onSliderLoad(slider.active.index); // slider has been fully initialized slider.initialized = true; // bind the resize call to the window if (slider.settings.responsive) $(window).bind('resize', resizeWindow); // if auto is true and has more than 1 page, start the show if (slider.settings.auto && slider.settings.autoStart && (getPagerQty() > 1 || slider.settings.autoSlideForOnePage)) initAuto(); // if ticker is true, start the ticker if (slider.settings.ticker) initTicker(); // if pager is requested, make the appropriate pager link active if (slider.settings.pager) updatePagerActive(slider.settings.startSlide); // check for any updates to the controls (like hideControlOnEnd updates) if (slider.settings.controls) updateDirectionControls(); // if touchEnabled is true, setup the touch events if (slider.settings.touchEnabled && !slider.settings.ticker) initTouch(); } /** * Returns the calculated height of the viewport, used to determine either adaptiveHeight or the maxHeight value */ var getViewportHeight = function(){ var height = 0; // first determine which children (slides) should be used in our height calculation var children = $(); // if mode is not "vertical" and adaptiveHeight is false, include all children if(slider.settings.mode != 'vertical' && !slider.settings.adaptiveHeight){ children = slider.children; }else{ // if not carousel, return the single active child if(!slider.carousel){ children = slider.children.eq(slider.active.index); // if carousel, return a slice of children }else{ // get the individual slide index var currentIndex = slider.settings.moveSlides == 1 ? slider.active.index : slider.active.index * getMoveBy(); // add the current slide to the children children = slider.children.eq(currentIndex); // cycle through the remaining "showing" slides for (i = 1; i <= slider.settings.maxSlides - 1; i++){ // if looped back to the start if(currentIndex + i >= slider.children.length){ children = children.add(slider.children.eq(i - 1)); }else{ children = children.add(slider.children.eq(currentIndex + i)); } } } } // if "vertical" mode, calculate the sum of the heights of the children if(slider.settings.mode == 'vertical'){ children.each(function(index) { height += $(this).outerHeight(); }); // add user-supplied margins if(slider.settings.slideMargin > 0){ height += slider.settings.slideMargin * (slider.settings.minSlides - 1); } // if not "vertical" mode, calculate the max height of the children }else{ height = Math.max.apply(Math, children.map(function(){ return $(this).outerHeight(false); }).get()); } if(slider.viewport.css('box-sizing') == 'border-box'){ height += parseFloat(slider.viewport.css('padding-top')) + parseFloat(slider.viewport.css('padding-bottom')) + parseFloat(slider.viewport.css('border-top-width')) + parseFloat(slider.viewport.css('border-bottom-width')); }else if(slider.viewport.css('box-sizing') == 'padding-box'){ height += parseFloat(slider.viewport.css('padding-top')) + parseFloat(slider.viewport.css('padding-bottom')); } return height; } /** * Returns the calculated width to be used for the outer wrapper / viewport */ var getViewportMaxWidth = function(){ var width = '100%'; if(slider.settings.slideWidth > 0){ if(slider.settings.mode == 'horizontal'){ width = (slider.settings.maxSlides * slider.settings.slideWidth) + ((slider.settings.maxSlides - 1) * slider.settings.slideMargin); }else{ width = slider.settings.slideWidth; } } return width; } /** * Returns the calculated width to be applied to each slide */ var getSlideWidth = function(){ // start with any user-supplied slide width var newElWidth = slider.settings.slideWidth; // get the current viewport width var wrapWidth = slider.viewport.width(); // if slide width was not supplied, or is larger than the viewport use the viewport width if(slider.settings.slideWidth == 0 || (slider.settings.slideWidth > wrapWidth && !slider.carousel) || slider.settings.mode == 'vertical'){ newElWidth = wrapWidth; // if carousel, use the thresholds to determine the width }else if(slider.settings.maxSlides > 1 && slider.settings.mode == 'horizontal'){ if(wrapWidth > slider.maxThreshold){ // newElWidth = (wrapWidth - (slider.settings.slideMargin * (slider.settings.maxSlides - 1))) / slider.settings.maxSlides; }else if(wrapWidth < slider.minThreshold){ newElWidth = (wrapWidth - (slider.settings.slideMargin * (slider.settings.minSlides - 1))) / slider.settings.minSlides; } } return newElWidth; } /** * Returns the number of slides currently visible in the viewport (includes partially visible slides) */ var getNumberSlidesShowing = function(){ var slidesShowing = 1; if(slider.settings.mode == 'horizontal' && slider.settings.slideWidth > 0){ // if viewport is smaller than minThreshold, return minSlides if(slider.viewport.width() < slider.minThreshold){ slidesShowing = slider.settings.minSlides; // if viewport is larger than minThreshold, return maxSlides }else if(slider.viewport.width() > slider.maxThreshold){ slidesShowing = slider.settings.maxSlides; // if viewport is between min / max thresholds, divide viewport width by first child width }else{ var childWidth = slider.children.first().width() + slider.settings.slideMargin; slidesShowing = Math.floor((slider.viewport.width() + slider.settings.slideMargin) / childWidth); } // if "vertical" mode, slides showing will always be minSlides }else if(slider.settings.mode == 'vertical'){ slidesShowing = slider.settings.minSlides; } return slidesShowing; } /** * Returns the number of pages (one full viewport of slides is one "page") */ var getPagerQty = function(){ var pagerQty = 0; // if moveSlides is specified by the user if(slider.settings.moveSlides > 0){ if(slider.settings.infiniteLoop){ pagerQty = Math.ceil(slider.children.length / getMoveBy()); }else{ // use a while loop to determine pages var breakPoint = 0; var counter = 0 // when breakpoint goes above children length, counter is the number of pages while (breakPoint < slider.children.length){ ++pagerQty; breakPoint = counter + getNumberSlidesShowing(); counter += slider.settings.moveSlides <= getNumberSlidesShowing() ? slider.settings.moveSlides : getNumberSlidesShowing(); } } // if moveSlides is 0 (auto) divide children length by sides showing, then round up }else{ pagerQty = Math.ceil(slider.children.length / getNumberSlidesShowing()); } return pagerQty; } /** * Returns the number of indivual slides by which to shift the slider */ var getMoveBy = function(){ // if moveSlides was set by the user and moveSlides is less than number of slides showing if(slider.settings.moveSlides > 0 && slider.settings.moveSlides <= getNumberSlidesShowing()){ return slider.settings.moveSlides; } // if moveSlides is 0 (auto) return getNumberSlidesShowing(); } /** * Sets the slider's (el) left or top position */ var setSlidePosition = function(){ // if last slide, not infinite loop, and number of children is larger than specified maxSlides if(slider.children.length > slider.settings.maxSlides && slider.active.last && !slider.settings.infiniteLoop){ if (slider.settings.mode == 'horizontal'){ // get the last child's position var lastChild = slider.children.last(); var position = lastChild.position(); // set the left position setPositionProperty(-(position.left - (slider.viewport.width() - lastChild.outerWidth())), 'reset', 0); }else if(slider.settings.mode == 'vertical'){ // get the last showing index's position var lastShowingIndex = slider.children.length - slider.settings.minSlides; var position = slider.children.eq(lastShowingIndex).position(); // set the top position setPositionProperty(-position.top, 'reset', 0); } // if not last slide }else{ // get the position of the first showing slide var position = slider.children.eq(slider.active.index * getMoveBy()).position(); // check for last slide if (slider.active.index == getPagerQty() - 1) slider.active.last = true; // set the repective position if (position != undefined){ if (slider.settings.mode == 'horizontal') setPositionProperty(-position.left, 'reset', 0); else if (slider.settings.mode == 'vertical') setPositionProperty(-position.top, 'reset', 0); } } } /** * Sets the el's animating property position (which in turn will sometimes animate el). * If using CSS, sets the transform property. If not using CSS, sets the top / left property. * * @param value (int) * - the animating property's value * * @param type (string) 'slider', 'reset', 'ticker' * - the type of instance for which the function is being * * @param duration (int) * - the amount of time (in ms) the transition should occupy * * @param params (array) optional * - an optional parameter containing any variables that need to be passed in */ var setPositionProperty = function(value, type, duration, params){ // use CSS transform if(slider.usingCSS){ // determine the translate3d value var propValue = slider.settings.mode == 'vertical' ? 'translate3d(0, ' + value + 'px, 0)' : 'translate3d(' + value + 'px, 0, 0)'; // add the CSS transition-duration el.css('-' + slider.cssPrefix + '-transition-duration', duration / 1000 + 's'); if(type == 'slide'){ // set the property value el.css(slider.animProp, propValue); // bind a callback method - executes when CSS transition completes el.bind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd', function(){ // unbind the callback el.unbind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd'); updateAfterSlideTransition(); }); }else if(type == 'reset'){ el.css(slider.animProp, propValue); }else if(type == 'ticker'){ // make the transition use 'linear' el.css('-' + slider.cssPrefix + '-transition-timing-function', 'linear'); el.css(slider.animProp, propValue); // bind a callback method - executes when CSS transition completes el.bind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd', function(){ // unbind the callback el.unbind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd'); // reset the position setPositionProperty(params['resetValue'], 'reset', 0); // start the loop again tickerLoop(); }); } // use JS animate }else{ var animateObj = {}; animateObj[slider.animProp] = value; if(type == 'slide'){ el.animate(animateObj, duration, slider.settings.easing, function(){ updateAfterSlideTransition(); }); }else if(type == 'reset'){ el.css(slider.animProp, value) }else if(type == 'ticker'){ el.animate(animateObj, speed, 'linear', function(){ setPositionProperty(params['resetValue'], 'reset', 0); // run the recursive loop after animation tickerLoop(); }); } } } /** * Populates the pager with proper amount of pages */ var populatePager = function(){ var pagerHtml = ''; var pagerQty = getPagerQty(); // loop through each pager item for(var i=0; i < pagerQty; i++){ var linkContent = ''; // if a buildPager function is supplied, use it to get pager link value, else use index + 1 if(slider.settings.buildPager && $.isFunction(slider.settings.buildPager)){ linkContent = slider.settings.buildPager(i); slider.pagerEl.addClass('bx-custom-pager'); }else{ linkContent = i + 1; slider.pagerEl.addClass('bx-default-pager'); } // var linkContent = slider.settings.buildPager && $.isFunction(slider.settings.buildPager) ? slider.settings.buildPager(i) : i + 1; // add the markup to the string pagerHtml +='';// '<div class="bx-pager-item"><a href="" data-slide-index="' + i + '" class="bx-pager-link">' + linkContent + '</a></div>'; }; // populate the pager element with pager links slider.pagerEl.html(pagerHtml); } /** * Appends the pager to the controls element */ var appendPager = function(){ if(!slider.settings.pagerCustom){ // create the pager DOM element slider.pagerEl = $('<div class="bx-pager" />'); // if a pager selector was supplied, populate it with the pager if(slider.settings.pagerSelector){ $(slider.settings.pagerSelector).html(slider.pagerEl); // if no pager selector was supplied, add it after the wrapper }else{ slider.controls.el.addClass('bx-has-pager').append(slider.pagerEl); } // populate the pager populatePager(); }else{ slider.pagerEl = $(slider.settings.pagerCustom); } // assign the pager click binding slider.pagerEl.on('click', 'a', clickPagerBind); } /** * Appends prev / next controls to the controls element */ var appendControls = function(){ slider.controls.next = $('<a class="bx-next" href="">' + slider.settings.nextText + '</a>'); slider.controls.prev = $('<a class="bx-prev" href="">' + slider.settings.prevText + '</a>'); // bind click actions to the controls slider.controls.next.bind('click', clickNextBind); slider.controls.prev.bind('click', clickPrevBind); // if nextSlector was supplied, populate it if(slider.settings.nextSelector){ $(slider.settings.nextSelector).append(slider.controls.next); } // if prevSlector was supplied, populate it if(slider.settings.prevSelector){ $(slider.settings.prevSelector).append(slider.controls.prev); } // if no custom selectors were supplied if(!slider.settings.nextSelector && !slider.settings.prevSelector){ // add the controls to the DOM slider.controls.directionEl = $('<div class="bx-controls-direction" />'); // add the control elements to the directionEl slider.controls.directionEl.append(slider.controls.prev).append(slider.controls.next); // slider.viewport.append(slider.controls.directionEl); slider.controls.el.addClass('bx-has-controls-direction').append(slider.controls.directionEl); } } /** * Appends start / stop auto controls to the controls element */ var appendControlsAuto = function(){ slider.controls.start = $('<div class="bx-controls-auto-item"><a class="bx-start" href="">' + slider.settings.startText + '</a></div>'); slider.controls.stop = $('<div class="bx-controls-auto-item"><a class="bx-stop" href="">' + slider.settings.stopText + '</a></div>'); // add the controls to the DOM slider.controls.autoEl = $('<div class="bx-controls-auto" />'); // bind click actions to the controls slider.controls.autoEl.on('click', '.bx-start', clickStartBind); slider.controls.autoEl.on('click', '.bx-stop', clickStopBind); // if autoControlsCombine, insert only the "start" control if(slider.settings.autoControlsCombine){ slider.controls.autoEl.append(slider.controls.start); // if autoControlsCombine is false, insert both controls }else{ slider.controls.autoEl.append(slider.controls.start).append(slider.controls.stop); } // if auto controls selector was supplied, populate it with the controls if(slider.settings.autoControlsSelector){ $(slider.settings.autoControlsSelector).html(slider.controls.autoEl); // if auto controls selector was not supplied, add it after the wrapper }else{ slider.controls.el.addClass('bx-has-controls-auto').append(slider.controls.autoEl); } // update the auto controls updateAutoControls(slider.settings.autoStart ? 'stop' : 'start'); } /** * Appends image captions to the DOM */ var appendCaptions = function(){ // cycle through each child slider.children.each(function(index){ // get the image title attribute var title = $(this).find('img:first').attr('title'); // append the caption if (title != undefined && ('' + title).length) { $(this).append('<div class="bx-caption"><span>' + title + '</span></div>'); } }); } /** * Click next binding * * @param e (event) * - DOM event object */ var clickNextBind = function(e){ // if auto show is running, stop it if (slider.settings.auto) el.stopAuto(); el.goToNextSlide(); e.preventDefault(); } /** * Click prev binding * * @param e (event) * - DOM event object */ var clickPrevBind = function(e){ // if auto show is running, stop it if (slider.settings.auto) el.stopAuto(); el.goToPrevSlide(); e.preventDefault(); } /** * Click start binding * * @param e (event) * - DOM event object */ var clickStartBind = function(e){ el.startAuto(); e.preventDefault(); } /** * Click stop binding * * @param e (event) * - DOM event object */ var clickStopBind = function(e){ el.stopAuto(); e.preventDefault(); } /** * Click pager binding * * @param e (event) * - DOM event object */ var clickPagerBind = function(e){ // if auto show is running, stop it if (slider.settings.auto) el.stopAuto(); var pagerLink = $(e.currentTarget); if(pagerLink.attr('data-slide-index') !== undefined){ var pagerIndex = parseInt(pagerLink.attr('data-slide-index')); // if clicked pager link is not active, continue with the goToSlide call if(pagerIndex != slider.active.index) el.goToSlide(pagerIndex); e.preventDefault(); } } /** * Updates the pager links with an active class * * @param slideIndex (int) * - index of slide to make active */ var updatePagerActive = function(slideIndex){ // if "short" pager type var len = slider.children.length; // nb of children if(slider.settings.pagerType == 'short'){ if(slider.settings.maxSlides > 1) { len = Math.ceil(slider.children.length/slider.settings.maxSlides); } slider.pagerEl.html( (slideIndex + 1) + slider.settings.pagerShortSeparator + len); return; } // remove all pager active classes slider.pagerEl.find('a').removeClass('active'); // apply the active class for all pagers slider.pagerEl.each(function(i, el) { $(el).find('a').eq(slideIndex).addClass('active'); }); } /** * Performs needed actions after a slide transition */ var updateAfterSlideTransition = function(){ // if infinte loop is true if(slider.settings.infiniteLoop){ var position = ''; // first slide if(slider.active.index == 0){ // set the new position position = slider.children.eq(0).position(); // carousel, last slide }else if(slider.active.index == getPagerQty() - 1 && slider.carousel){ position = slider.children.eq((getPagerQty() - 1) * getMoveBy()).position(); // last slide }else if(slider.active.index == slider.children.length - 1){ position = slider.children.eq(slider.children.length - 1).position(); } if(position){ if (slider.settings.mode == 'horizontal') { setPositionProperty(-position.left, 'reset', 0); } else if (slider.settings.mode == 'vertical') { setPositionProperty(-position.top, 'reset', 0); } } } // declare that the transition is complete slider.working = false; // onSlideAfter callback slider.settings.onSlideAfter(slider.children.eq(slider.active.index), slider.oldIndex, slider.active.index); } /** * Updates the auto controls state (either active, or combined switch) * * @param state (string) "start", "stop" * - the new state of the auto show */ var updateAutoControls = function(state){ // if autoControlsCombine is true, replace the current control with the new state if(slider.settings.autoControlsCombine){ slider.controls.autoEl.html(slider.controls[state]); // if autoControlsCombine is false, apply the "active" class to the appropriate control }else{ slider.controls.autoEl.find('a').removeClass('active'); slider.controls.autoEl.find('a:not(.bx-' + state + ')').addClass('active'); } } /** * Updates the direction controls (checks if either should be hidden) */ var updateDirectionControls = function(){ if(getPagerQty() == 1){ slider.controls.prev.addClass('disabled'); slider.controls.next.addClass('disabled'); }else if(!slider.settings.infiniteLoop && slider.settings.hideControlOnEnd){ // if first slide if (slider.active.index == 0){ slider.controls.prev.addClass('disabled'); slider.controls.next.removeClass('disabled'); // if last slide }else if(slider.active.index == getPagerQty() - 1){ slider.controls.next.addClass('disabled'); slider.controls.prev.removeClass('disabled'); // if any slide in the middle }else{ slider.controls.prev.removeClass('disabled'); slider.controls.next.removeClass('disabled'); } } } /** * Initialzes the auto process */ var initAuto = function(){ // if autoDelay was supplied, launch the auto show using a setTimeout() call if(slider.settings.autoDelay > 0){ var timeout = setTimeout(el.startAuto, slider.settings.autoDelay); // if autoDelay was not supplied, start the auto show normally }else{ el.startAuto(); } // if autoHover is requested if(slider.settings.autoHover){ // on el hover el.hover(function(){ // if the auto show is currently playing (has an active interval) if(slider.interval){ // stop the auto show and pass true agument which will prevent control update el.stopAuto(true); // create a new autoPaused value which will be used by the relative "mouseout" event slider.autoPaused = true; } }, function(){ // if the autoPaused value was created be the prior "mouseover" event if(slider.autoPaused){ // start the auto show and pass true agument which will prevent control update el.startAuto(true); // reset the autoPaused value slider.autoPaused = null; } }); } } /** * Initialzes the ticker process */ var initTicker = function(){ var startPosition = 0; // if autoDirection is "next", append a clone of the entire slider if(slider.settings.autoDirection == 'next'){ el.append(slider.children.clone().addClass('bx-clone')); // if autoDirection is "prev", prepend a clone of the entire slider, and set the left position }else{ el.prepend(slider.children.clone().addClass('bx-clone')); var position = slider.children.first().position(); startPosition = slider.settings.mode == 'horizontal' ? -position.left : -position.top; } setPositionProperty(startPosition, 'reset', 0); // do not allow controls in ticker mode slider.settings.pager = false; slider.settings.controls = false; slider.settings.autoControls = false; // if autoHover is requested if(slider.settings.tickerHover && !slider.usingCSS){ // on el hover slider.viewport.hover(function(){ el.stop(); }, function(){ // calculate the total width of children (used to calculate the speed ratio) var totalDimens = 0; slider.children.each(function(index){ totalDimens += slider.settings.mode == 'horizontal' ? $(this).outerWidth(true) : $(this).outerHeight(true); }); // calculate the speed ratio (used to determine the new speed to finish the paused animation) var ratio = slider.settings.speed / totalDimens; // determine which property to use var property = slider.settings.mode == 'horizontal' ? 'left' : 'top'; // calculate the new speed var newSpeed = ratio * (totalDimens - (Math.abs(parseInt(el.css(property))))); tickerLoop(newSpeed); }); } // start the ticker loop tickerLoop(); } /** * Runs a continuous loop, news ticker-style */ var tickerLoop = function(resumeSpeed){ speed = resumeSpeed ? resumeSpeed : slider.settings.speed; var position = {left: 0, top: 0}; var reset = {left: 0, top: 0}; // if "next" animate left position to last child, then reset left to 0 if(slider.settings.autoDirection == 'next'){ position = el.find('.bx-clone').first().position(); // if "prev" animate left position to 0, then reset left to first non-clone child }else{ reset = slider.children.first().position(); } var animateProperty = slider.settings.mode == 'horizontal' ? -position.left : -position.top; var resetValue = slider.settings.mode == 'horizontal' ? -reset.left : -reset.top; var params = {resetValue: resetValue}; setPositionProperty(animateProperty, 'ticker', speed, params); } /** * Initializes touch events */ var initTouch = function(){ // initialize object to contain all touch values slider.touch = { start: {x: 0, y: 0}, end: {x: 0, y: 0} } slider.viewport.bind('touchstart', onTouchStart); } /** * Event handler for "touchstart" * * @param e (event) * - DOM event object */ var onTouchStart = function(e){ if(slider.working){ e.preventDefault(); }else{ // record the original position when touch starts slider.touch.originalPos = el.position(); var orig = e.originalEvent; // record the starting touch x, y coordinates slider.touch.start.x = orig.changedTouches[0].pageX; slider.touch.start.y = orig.changedTouches[0].pageY; // bind a "touchmove" event to the viewport slider.viewport.bind('touchmove', onTouchMove); // bind a "touchend" event to the viewport slider.viewport.bind('touchend', onTouchEnd); } } /** * Event handler for "touchmove" * * @param e (event) * - DOM event object */ var onTouchMove = function(e){ var orig = e.originalEvent; // if scrolling on y axis, do not prevent default var xMovement = Math.abs(orig.changedTouches[0].pageX - slider.touch.start.x); var yMovement = Math.abs(orig.changedTouches[0].pageY - slider.touch.start.y); // x axis swipe if((xMovement * 3) > yMovement && slider.settings.preventDefaultSwipeX){ e.preventDefault(); // y axis swipe }else if((yMovement * 3) > xMovement && slider.settings.preventDefaultSwipeY){ e.preventDefault(); } if(slider.settings.mode != 'fade' && slider.settings.oneToOneTouch){ var value = 0; // if horizontal, drag along x axis if(slider.settings.mode == 'horizontal'){ var change = orig.changedTouches[0].pageX - slider.touch.start.x; value = slider.touch.originalPos.left + change; // if vertical, drag along y axis }else{ var change = orig.changedTouches[0].pageY - slider.touch.start.y; value = slider.touch.originalPos.top + change; } setPositionProperty(value, 'reset', 0); } } /** * Event handler for "touchend" * * @param e (event) * - DOM event object */ var onTouchEnd = function(e){ slider.viewport.unbind('touchmove', onTouchMove); var orig = e.originalEvent; var value = 0; // record end x, y positions slider.touch.end.x = orig.changedTouches[0].pageX; slider.touch.end.y = orig.changedTouches[0].pageY; // if fade mode, check if absolute x distance clears the threshold if(slider.settings.mode == 'fade'){ var distance = Math.abs(slider.touch.start.x - slider.touch.end.x); if(distance >= slider.settings.swipeThreshold){ slider.touch.start.x > slider.touch.end.x ? el.goToNextSlide() : el.goToPrevSlide(); el.stopAuto(); } // not fade mode }else{ var distance = 0; // calculate distance and el's animate property if(slider.settings.mode == 'horizontal'){ distance = slider.touch.end.x - slider.touch.start.x; value = slider.touch.originalPos.left; }else{ distance = slider.touch.end.y - slider.touch.start.y; value = slider.touch.originalPos.top; } // if not infinite loop and first / last slide, do not attempt a slide transition if(!slider.settings.infiniteLoop && ((slider.active.index == 0 && distance > 0) || (slider.active.last && distance < 0))){ setPositionProperty(value, 'reset', 200); }else{ // check if distance clears threshold if(Math.abs(distance) >= slider.settings.swipeThreshold){ distance < 0 ? el.goToNextSlide() : el.goToPrevSlide(); el.stopAuto(); }else{ // el.animate(property, 200); setPositionProperty(value, 'reset', 200); } } } slider.viewport.unbind('touchend', onTouchEnd); } /** * Window resize event callback */ var resizeWindow = function(e){ // don't do anything if slider isn't initialized. if(!slider.initialized) return; // get the new window dimens (again, thank you IE) var windowWidthNew = $(window).width(); var windowHeightNew = $(window).height(); // make sure that it is a true window resize // *we must check this because our dinosaur friend IE fires a window resize event when certain DOM elements // are resized. Can you just die already?* if(windowWidth != windowWidthNew || windowHeight != windowHeightNew){ // set the new window dimens windowWidth = windowWidthNew; windowHeight = windowHeightNew; // update all dynamic elements el.redrawSlider(); // Call user resize handler slider.settings.onSliderResize.call(el, slider.active.index); } } /** * =================================================================================== * = PUBLIC FUNCTIONS * =================================================================================== */ /** * Performs slide transition to the specified slide * * @param slideIndex (int) * - the destination slide's index (zero-based) * * @param direction (string) * - INTERNAL USE ONLY - the direction of travel ("prev" / "next") */ el.goToSlide = function(slideIndex, direction){ // if plugin is currently in motion, ignore request if(slider.working || slider.active.index == slideIndex) return; // declare that plugin is in motion slider.working = true; // store the old index slider.oldIndex = slider.active.index; // if slideIndex is less than zero, set active index to last child (this happens during infinite loop) if(slideIndex < 0){ slider.active.index = getPagerQty() - 1; // if slideIndex is greater than children length, set active index to 0 (this happens during infinite loop) }else if(slideIndex >= getPagerQty()){ slider.active.index = 0; // set active index to requested slide }else{ slider.active.index = slideIndex; } // onSlideBefore, onSlideNext, onSlidePrev callbacks slider.settings.onSlideBefore(slider.children.eq(slider.active.index), slider.oldIndex, slider.active.index); if(direction == 'next'){ slider.settings.onSlideNext(slider.children.eq(slider.active.index), slider.oldIndex, slider.active.index); }else if(direction == 'prev'){ slider.settings.onSlidePrev(slider.children.eq(slider.active.index), slider.oldIndex, slider.active.index); } // check if last slide slider.active.last = slider.active.index >= getPagerQty() - 1; // update the pager with active class if(slider.settings.pager) updatePagerActive(slider.active.index); // // check for direction control update if(slider.settings.controls) updateDirectionControls(); // if slider is set to mode: "fade" if(slider.settings.mode == 'fade'){ // if adaptiveHeight is true and next height is different from current height, animate to the new height if(slider.settings.adaptiveHeight && slider.viewport.height() != getViewportHeight()){ slider.viewport.animate({height: getViewportHeight()}, slider.settings.adaptiveHeightSpeed); } // fade out the visible child and reset its z-index value slider.children.filter(':visible').fadeOut(slider.settings.speed).css({zIndex: 0}); // fade in the newly requested slide slider.children.eq(slider.active.index).css('zIndex', slider.settings.slideZIndex+1).fadeIn(slider.settings.speed, function(){ $(this).css('zIndex', slider.settings.slideZIndex); updateAfterSlideTransition(); }); // slider mode is not "fade" }else{ // if adaptiveHeight is true and next height is different from current height, animate to the new height if(slider.settings.adaptiveHeight && slider.viewport.height() != getViewportHeight()){ slider.viewport.animate({height: getViewportHeight()}, slider.settings.adaptiveHeightSpeed); } var moveBy = 0; var position = {left: 0, top: 0}; // if carousel and not infinite loop if(!slider.settings.infiniteLoop && slider.carousel && slider.active.last){ if(slider.settings.mode == 'horizontal'){ // get the last child position var lastChild = slider.children.eq(slider.children.length - 1); position = lastChild.position(); // calculate the position of the last slide moveBy = slider.viewport.width() - lastChild.outerWidth(); }else{ // get last showing index position var lastShowingIndex = slider.children.length - slider.settings.minSlides; position = slider.children.eq(lastShowingIndex).position(); } // horizontal carousel, going previous while on first slide (infiniteLoop mode) }else if(slider.carousel && slider.active.last && direction == 'prev'){ // get the last child position var eq = slider.settings.moveSlides == 1 ? slider.settings.maxSlides - getMoveBy() : ((getPagerQty() - 1) * getMoveBy()) - (slider.children.length - slider.settings.maxSlides); var lastChild = el.children('.bx-clone').eq(eq); position = lastChild.position(); // if infinite loop and "Next" is clicked on the last slide }else if(direction == 'next' && slider.active.index == 0){ // get the last clone position position = el.find('> .bx-clone').eq(slider.settings.maxSlides).position(); slider.active.last = false; // normal non-zero requests }else if(slideIndex >= 0){ var requestEl = slideIndex * getMoveBy(); position = slider.children.eq(requestEl).position(); } /* If the position doesn't exist * (e.g. if you destroy the slider on a next click), * it doesn't throw an error. */ if ("undefined" !== typeof(position)) { var value = slider.settings.mode == 'horizontal' ? -(position.left - moveBy) : -position.top; // plugin values to be animated setPositionProperty(value, 'slide', slider.settings.speed); } } } /** * Transitions to the next slide in the show */ el.goToNextSlide = function(){ // if infiniteLoop is false and last page is showing, disregard call if (!slider.settings.infiniteLoop && slider.active.last) return; var pagerIndex = parseInt(slider.active.index) + 1; el.goToSlide(pagerIndex, 'next'); } /** * Transitions to the prev slide in the show */ el.goToPrevSlide = function(){ // if infiniteLoop is false and last page is showing, disregard call if (!slider.settings.infiniteLoop && slider.active.index == 0) return; var pagerIndex = parseInt(slider.active.index) - 1; el.goToSlide(pagerIndex, 'prev'); } /** * Starts the auto show * * @param preventControlUpdate (boolean) * - if true, auto controls state will not be updated */ el.startAuto = function(preventControlUpdate){ // if an interval already exists, disregard call if(slider.interval) return; // create an interval slider.interval = setInterval(function(){ slider.settings.autoDirection == 'next' ? el.goToNextSlide() : el.goToPrevSlide(); }, slider.settings.pause); // if auto controls are displayed and preventControlUpdate is not true if (slider.settings.autoControls && preventControlUpdate != true) updateAutoControls('stop'); } /** * Stops the auto show * * @param preventControlUpdate (boolean) * - if true, auto controls state will not be updated */ el.stopAuto = function(preventControlUpdate){ // if no interval exists, disregard call if(!slider.interval) return; // clear the interval clearInterval(slider.interval); slider.interval = null; // if auto controls are displayed and preventControlUpdate is not true if (slider.settings.autoControls && preventControlUpdate != true) updateAutoControls('start'); } /** * Returns current slide index (zero-based) */ el.getCurrentSlide = function(){ return slider.active.index; } /** * Returns current slide element */ el.getCurrentSlideElement = function(){ return slider.children.eq(slider.active.index); } /** * Returns number of slides in show */ el.getSlideCount = function(){ return slider.children.length; } /** * Update all dynamic slider elements */ el.redrawSlider = function(){ // resize all children in ratio to new screen size slider.children.add(el.find('.bx-clone')).width(getSlideWidth()); // adjust the height slider.viewport.css('height', getViewportHeight()); // update the slide position if(!slider.settings.ticker) setSlidePosition(); // if active.last was true before the screen resize, we want // to keep it last no matter what screen size we end on if (slider.active.last) slider.active.index = getPagerQty() - 1; // if the active index (page) no longer exists due to the resize, simply set the index as last if (slider.active.index >= getPagerQty()) slider.active.last = true; // if a pager is being displayed and a custom pager is not being used, update it if(slider.settings.pager && !slider.settings.pagerCustom){ populatePager(); updatePagerActive(slider.active.index); } } /** * Destroy the current instance of the slider (revert everything back to original state) */ el.destroySlider = function(){ // don't do anything if slider has already been destroyed if(!slider.initialized) return; slider.initialized = false; $('.bx-clone', this).remove(); slider.children.each(function() { $(this).data("origStyle") != undefined ? $(this).attr("style", $(this).data("origStyle")) : $(this).removeAttr('style'); }); $(this).data("origStyle") != undefined ? this.attr("style", $(this).data("origStyle")) : $(this).removeAttr('style'); $(this).unwrap().unwrap(); if(slider.controls.el) slider.controls.el.remove(); if(slider.controls.next) slider.controls.next.remove(); if(slider.controls.prev) slider.controls.prev.remove(); if(slider.pagerEl && slider.settings.controls) slider.pagerEl.remove(); $('.bx-caption', this).remove(); if(slider.controls.autoEl) slider.controls.autoEl.remove(); clearInterval(slider.interval); if(slider.settings.responsive) $(window).unbind('resize', resizeWindow); } /** * Reload the slider (revert all DOM changes, and re-initialize) */ el.reloadSlider = function(settings){ if (settings != undefined) options = settings; el.destroySlider(); init(); } init(); // returns the current jQuery object return this; } })(jQuery);
保存
取消
返回文件列表