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/** |
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* jquery.detectSwipe v2.1.3 |
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* jQuery Plugin to obtain touch gestures from iPhone, iPod Touch, iPad and Android |
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* http://github.com/marcandre/detect_swipe |
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* Based on touchwipe by Andreas Waltl, netCU Internetagentur (http://www.netcu.de) |
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*/ |
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|
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(function (factory) { |
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if (typeof define === 'function' && define.amd) { |
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// AMD. Register as an anonymous module. |
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define(['jquery'], factory); |
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} else if (typeof exports === 'object') { |
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// Node/CommonJS |
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module.exports = factory(require('jquery')); |
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} else { |
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// Browser globals |
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factory(jQuery); |
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} |
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}(function($) { |
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|
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$.detectSwipe = { |
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version: '2.1.2', |
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enabled: 'ontouchstart' in document.documentElement, |
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preventDefault: true, |
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threshold: 20 |
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}; |
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|
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var startX, |
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startY, |
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isMoving = false; |
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|
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function onTouchEnd() { |
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this.removeEventListener('touchmove', onTouchMove); |
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this.removeEventListener('touchend', onTouchEnd); |
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isMoving = false; |
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} |
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|
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function onTouchMove(e) { |
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if ($.detectSwipe.preventDefault) { e.preventDefault(); } |
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if(isMoving) { |
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var x = e.touches[0].pageX; |
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var y = e.touches[0].pageY; |
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var dx = startX - x; |
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var dy = startY - y; |
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var dir; |
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if(Math.abs(dx) >= $.detectSwipe.threshold) { |
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dir = dx > 0 ? 'left' : 'right' |
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} |
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else if(Math.abs(dy) >= $.detectSwipe.threshold) { |
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dir = dy > 0 ? 'up' : 'down' |
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} |
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if(dir) { |
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onTouchEnd.call(this); |
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$(this).trigger('swipe', dir).trigger('swipe' + dir); |
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} |
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} |
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} |
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|
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function onTouchStart(e) { |
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if (e.touches.length == 1) { |
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startX = e.touches[0].pageX; |
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startY = e.touches[0].pageY; |
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isMoving = true; |
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this.addEventListener('touchmove', onTouchMove, false); |
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this.addEventListener('touchend', onTouchEnd, false); |
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} |
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} |
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|
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function setup() { |
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this.addEventListener && this.addEventListener('touchstart', onTouchStart, false); |
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} |
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|
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function teardown() { |
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this.removeEventListener('touchstart', onTouchStart); |
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} |
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|
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$.event.special.swipe = { setup: setup }; |
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|
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$.each(['left', 'up', 'down', 'right'], function () { |
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$.event.special['swipe' + this] = { setup: function(){ |
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$(this).on('swipe', $.noop); |
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} }; |
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}); |
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})); |
