70 lines
2.9 KiB
JavaScript
70 lines
2.9 KiB
JavaScript
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/*! swipe plugin for Cycle2; version: 20121120 */
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(function ($) {
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"use strict";
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// this script adds support for touch events. the logic is lifted from jQuery Mobile.
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// if you have jQuery Mobile installed, you do NOT need this script
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var supportTouch = 'ontouchend' in document;
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$.event.special.swipe = $.event.special.swipe || {
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scrollSupressionThreshold: 10, // More than this horizontal displacement, and we will suppress scrolling.
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durationThreshold: 1000, // More time than this, and it isn't a swipe.
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horizontalDistanceThreshold: 30, // Swipe horizontal displacement must be more than this.
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verticalDistanceThreshold: 75, // Swipe vertical displacement must be less than this.
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setup: function () {
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var $this = $(this);
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$this.bind('touchstart', function (event) {
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var data = event.originalEvent.touches ? event.originalEvent.touches[0] : event;
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var stop, start = {
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time: (new Date()).getTime(),
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coords: [data.pageX, data.pageY],
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origin: $(event.target)
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};
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function moveHandler(event) {
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if (!start)
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return;
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var data = event.originalEvent.touches ? event.originalEvent.touches[0] : event;
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stop = {
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time: (new Date()).getTime(),
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coords: [data.pageX, data.pageY]
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};
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// prevent scrolling
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if (Math.abs(start.coords[0] - stop.coords[0]) > $.event.special.swipe.scrollSupressionThreshold) {
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event.preventDefault();
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}
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}
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$this.bind('touchmove', moveHandler)
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.one('touchend', function (event) {
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$this.unbind('touchmove', moveHandler);
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if (start && stop) {
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if (stop.time - start.time < $.event.special.swipe.durationThreshold &&
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Math.abs(start.coords[0] - stop.coords[0]) > $.event.special.swipe.horizontalDistanceThreshold &&
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Math.abs(start.coords[1] - stop.coords[1]) < $.event.special.swipe.verticalDistanceThreshold) {
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start.origin.trigger("swipe")
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.trigger(start.coords[0] > stop.coords[0] ? "swipeleft" : "swiperight");
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}
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}
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start = stop = undefined;
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});
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});
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}
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};
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$.event.special.swipeleft = $.event.special.swipeleft || {
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setup: function () {
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$(this).bind('swipe', $.noop);
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}
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};
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$.event.special.swiperight = $.event.special.swiperight || $.event.special.swipeleft;
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})(jQuery);
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