| | 1 | /*! |
| | 2 | * jQuery UI Touch Punch 0.2.2 |
| | 3 | * |
| | 4 | * Copyright 2011, Dave Furfero |
| | 5 | * Dual licensed under the MIT or GPL Version 2 licenses. |
| | 6 | * |
| | 7 | * Depends: |
| | 8 | * jquery.ui.widget.js |
| | 9 | * jquery.ui.mouse.js |
| | 10 | */ |
| | 11 | (function ($) { |
| | 12 | |
| | 13 | // Detect touch support |
| | 14 | $.support.touch = 'ontouchend' in document; |
| | 15 | |
| | 16 | // Ignore browsers without touch support |
| | 17 | if (!$.support.touch) { |
| | 18 | return; |
| | 19 | } |
| | 20 | |
| | 21 | var mouseProto = $.ui.mouse.prototype, |
| | 22 | _mouseInit = mouseProto._mouseInit, |
| | 23 | touchHandled; |
| | 24 | |
| | 25 | /** |
| | 26 | * Simulate a mouse event based on a corresponding touch event |
| | 27 | * @param {Object} event A touch event |
| | 28 | * @param {String} simulatedType The corresponding mouse event |
| | 29 | */ |
| | 30 | function simulateMouseEvent (event, simulatedType) { |
| | 31 | |
| | 32 | // Ignore multi-touch events |
| | 33 | if (event.originalEvent.touches.length > 1) { |
| | 34 | return; |
| | 35 | } |
| | 36 | |
| | 37 | event.preventDefault(); |
| | 38 | |
| | 39 | var touch = event.originalEvent.changedTouches[0], |
| | 40 | simulatedEvent = document.createEvent('MouseEvents'); |
| | 41 | |
| | 42 | // Initialize the simulated mouse event using the touch event's coordinates |
| | 43 | simulatedEvent.initMouseEvent( |
| | 44 | simulatedType, // type |
| | 45 | true, // bubbles |
| | 46 | true, // cancelable |
| | 47 | window, // view |
| | 48 | 1, // detail |
| | 49 | touch.screenX, // screenX |
| | 50 | touch.screenY, // screenY |
| | 51 | touch.clientX, // clientX |
| | 52 | touch.clientY, // clientY |
| | 53 | false, // ctrlKey |
| | 54 | false, // altKey |
| | 55 | false, // shiftKey |
| | 56 | false, // metaKey |
| | 57 | 0, // button |
| | 58 | null // relatedTarget |
| | 59 | ); |
| | 60 | |
| | 61 | // Dispatch the simulated event to the target element |
| | 62 | event.target.dispatchEvent(simulatedEvent); |
| | 63 | } |
| | 64 | |
| | 65 | /** |
| | 66 | * Handle the jQuery UI widget's touchstart events |
| | 67 | * @param {Object} event The widget element's touchstart event |
| | 68 | */ |
| | 69 | mouseProto._touchStart = function (event) { |
| | 70 | |
| | 71 | var self = this; |
| | 72 | |
| | 73 | // Ignore the event if another widget is already being handled |
| | 74 | if (touchHandled || !self._mouseCapture(event.originalEvent.changedTouches[0])) { |
| | 75 | return; |
| | 76 | } |
| | 77 | |
| | 78 | // Set the flag to prevent other widgets from inheriting the touch event |
| | 79 | touchHandled = true; |
| | 80 | |
| | 81 | // Track movement to determine if interaction was a click |
| | 82 | self._touchMoved = false; |
| | 83 | |
| | 84 | // Simulate the mouseover event |
| | 85 | simulateMouseEvent(event, 'mouseover'); |
| | 86 | |
| | 87 | // Simulate the mousemove event |
| | 88 | simulateMouseEvent(event, 'mousemove'); |
| | 89 | |
| | 90 | // Simulate the mousedown event |
| | 91 | simulateMouseEvent(event, 'mousedown'); |
| | 92 | }; |
| | 93 | |
| | 94 | /** |
| | 95 | * Handle the jQuery UI widget's touchmove events |
| | 96 | * @param {Object} event The document's touchmove event |
| | 97 | */ |
| | 98 | mouseProto._touchMove = function (event) { |
| | 99 | |
| | 100 | // Ignore event if not handled |
| | 101 | if (!touchHandled) { |
| | 102 | return; |
| | 103 | } |
| | 104 | |
| | 105 | // Interaction was not a click |
| | 106 | this._touchMoved = true; |
| | 107 | |
| | 108 | // Simulate the mousemove event |
| | 109 | simulateMouseEvent(event, 'mousemove'); |
| | 110 | }; |
| | 111 | |
| | 112 | /** |
| | 113 | * Handle the jQuery UI widget's touchend events |
| | 114 | * @param {Object} event The document's touchend event |
| | 115 | */ |
| | 116 | mouseProto._touchEnd = function (event) { |
| | 117 | |
| | 118 | // Ignore event if not handled |
| | 119 | if (!touchHandled) { |
| | 120 | return; |
| | 121 | } |
| | 122 | |
| | 123 | // Simulate the mouseup event |
| | 124 | simulateMouseEvent(event, 'mouseup'); |
| | 125 | |
| | 126 | // Simulate the mouseout event |
| | 127 | simulateMouseEvent(event, 'mouseout'); |
| | 128 | |
| | 129 | // If the touch interaction did not move, it should trigger a click |
| | 130 | if (!this._touchMoved) { |
| | 131 | |
| | 132 | // Simulate the click event |
| | 133 | simulateMouseEvent(event, 'click'); |
| | 134 | } |
| | 135 | |
| | 136 | // Unset the flag to allow other widgets to inherit the touch event |
| | 137 | touchHandled = false; |
| | 138 | }; |
| | 139 | |
| | 140 | /** |
| | 141 | * A duck punch of the $.ui.mouse _mouseInit method to support touch events. |
| | 142 | * This method extends the widget with bound touch event handlers that |
| | 143 | * translate touch events to mouse events and pass them to the widget's |
| | 144 | * original mouse event handling methods. |
| | 145 | */ |
| | 146 | mouseProto._mouseInit = function () { |
| | 147 | |
| | 148 | var self = this; |
| | 149 | |
| | 150 | // Delegate the touch handlers to the widget's element |
| | 151 | self.element |
| | 152 | .bind('touchstart', $.proxy(self, '_touchStart')) |
| | 153 | .bind('touchmove', $.proxy(self, '_touchMove')) |
| | 154 | .bind('touchend', $.proxy(self, '_touchEnd')); |
| | 155 | |
| | 156 | // Call the original $.ui.mouse init method |
| | 157 | _mouseInit.call(self); |
| | 158 | }; |
| | 159 | |
| | 160 | })(jQuery); |