/*---description: Left and right swipe events for touch devices.license: MIT-style.authors:- Caleb Troughton;requires:core/1.2.4:- Element.Event- Class- Class.Extras/provides:MooSwipe*/
var MooSwipe = MooSwipe || new Class({Implements: [Options, Events],options: {tolerance: 70,preventDefaults: false},element: null,startX: null,isMoving: false,initialize: function(el, options) {this.setOptions(options);this.element = $(el);this.element.addListener('touchstart', this.onTouchStart.bind(this));},cancelTouch: function() {this.element.removeListener('touchmove', this.onTouchMove);this.startX = null;this.isMoving = false;},onTouchMove: function(e) {this.options.preventDefaults && e.preventDefault();if (this.isMoving) {var x = e.touches[0].pageX;var dx = this.startX - x;if (Math.abs(dx) >= this.options.tolerance) {this.cancelTouch();this.fireEvent(dx > 0 ? 'swipeleft' : 'swiperight');}}},onTouchStart: function(e) {if (e.touches.length == 1) {this.startX = e.touches[0].pageX;this.isMoving = true;this.element.addListener('touchmove', this.onTouchMove.bind(this));}}});