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