| 提交 | 用户 | 时间 | ||
| 58d006 | 1 | /*! |
| A | 2 | * jQuery UI Touch Punch 0.2.3 |
| 3 | * | |
| 4 | * Copyright 2011–2014, 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 | _mouseDestroy = mouseProto._mouseDestroy, | |
| 24 | touchHandled; | |
| 25 | ||
| 26 | /** | |
| 27 | * Simulate a mouse event based on a corresponding touch event | |
| 28 | * @param {Object} event A touch event | |
| 29 | * @param {String} simulatedType The corresponding mouse event | |
| 30 | */ | |
| 31 | function simulateMouseEvent (event, simulatedType) { | |
| 32 | ||
| 33 | // Ignore multi-touch events | |
| 34 | if (event.originalEvent.touches.length > 1) { | |
| 35 | return; | |
| 36 | } | |
| 37 | ||
| 38 | event.preventDefault(); | |
| 39 | ||
| 40 | var touch = event.originalEvent.changedTouches[0], | |
| 41 | simulatedEvent = document.createEvent('MouseEvents'); | |
| 42 | ||
| 43 | // Initialize the simulated mouse event using the touch event's coordinates | |
| 44 | simulatedEvent.initMouseEvent( | |
| 45 | simulatedType, // type | |
| 46 | true, // bubbles | |
| 47 | true, // cancelable | |
| 48 | window, // view | |
| 49 | 1, // detail | |
| 50 | touch.screenX, // screenX | |
| 51 | touch.screenY, // screenY | |
| 52 | touch.clientX, // clientX | |
| 53 | touch.clientY, // clientY | |
| 54 | false, // ctrlKey | |
| 55 | false, // altKey | |
| 56 | false, // shiftKey | |
| 57 | false, // metaKey | |
| 58 | 0, // button | |
| 59 | null // relatedTarget | |
| 60 | ); | |
| 61 | ||
| 62 | // Dispatch the simulated event to the target element | |
| 63 | event.target.dispatchEvent(simulatedEvent); | |
| 64 | } | |
| 65 | ||
| 66 | /** | |
| 67 | * Handle the jQuery UI widget's touchstart events | |
| 68 | * @param {Object} event The widget element's touchstart event | |
| 69 | */ | |
| 70 | mouseProto._touchStart = function (event) { | |
| 71 | ||
| 72 | var self = this; | |
| 73 | ||
| 74 | // Ignore the event if another widget is already being handled | |
| 75 | if (touchHandled || !self._mouseCapture(event.originalEvent.changedTouches[0])) { | |
| 76 | return; | |
| 77 | } | |
| 78 | ||
| 79 | // Set the flag to prevent other widgets from inheriting the touch event | |
| 80 | touchHandled = true; | |
| 81 | ||
| 82 | // Track movement to determine if interaction was a click | |
| 83 | self._touchMoved = false; | |
| 84 | ||
| 85 | // Simulate the mouseover event | |
| 86 | simulateMouseEvent(event, 'mouseover'); | |
| 87 | ||
| 88 | // Simulate the mousemove event | |
| 89 | simulateMouseEvent(event, 'mousemove'); | |
| 90 | ||
| 91 | // Simulate the mousedown event | |
| 92 | simulateMouseEvent(event, 'mousedown'); | |
| 93 | }; | |
| 94 | ||
| 95 | /** | |
| 96 | * Handle the jQuery UI widget's touchmove events | |
| 97 | * @param {Object} event The document's touchmove event | |
| 98 | */ | |
| 99 | mouseProto._touchMove = function (event) { | |
| 100 | ||
| 101 | // Ignore event if not handled | |
| 102 | if (!touchHandled) { | |
| 103 | return; | |
| 104 | } | |
| 105 | ||
| 106 | // Interaction was not a click | |
| 107 | this._touchMoved = true; | |
| 108 | ||
| 109 | // Simulate the mousemove event | |
| 110 | simulateMouseEvent(event, 'mousemove'); | |
| 111 | }; | |
| 112 | ||
| 113 | /** | |
| 114 | * Handle the jQuery UI widget's touchend events | |
| 115 | * @param {Object} event The document's touchend event | |
| 116 | */ | |
| 117 | mouseProto._touchEnd = function (event) { | |
| 118 | ||
| 119 | // Ignore event if not handled | |
| 120 | if (!touchHandled) { | |
| 121 | return; | |
| 122 | } | |
| 123 | ||
| 124 | // Simulate the mouseup event | |
| 125 | simulateMouseEvent(event, 'mouseup'); | |
| 126 | ||
| 127 | // Simulate the mouseout event | |
| 128 | simulateMouseEvent(event, 'mouseout'); | |
| 129 | ||
| 130 | // If the touch interaction did not move, it should trigger a click | |
| 131 | if (!this._touchMoved) { | |
| 132 | ||
| 133 | // Simulate the click event | |
| 134 | simulateMouseEvent(event, 'click'); | |
| 135 | } | |
| 136 | ||
| 137 | // Unset the flag to allow other widgets to inherit the touch event | |
| 138 | touchHandled = false; | |
| 139 | }; | |
| 140 | ||
| 141 | /** | |
| 142 | * A duck punch of the $.ui.mouse _mouseInit method to support touch events. | |
| 143 | * This method extends the widget with bound touch event handlers that | |
| 144 | * translate touch events to mouse events and pass them to the widget's | |
| 145 | * original mouse event handling methods. | |
| 146 | */ | |
| 147 | mouseProto._mouseInit = function () { | |
| 148 | ||
| 149 | var self = this; | |
| 150 | ||
| 151 | // Delegate the touch handlers to the widget's element | |
| 152 | self.element.bind({ | |
| 153 | touchstart: $.proxy(self, '_touchStart'), | |
| 154 | touchmove: $.proxy(self, '_touchMove'), | |
| 155 | touchend: $.proxy(self, '_touchEnd') | |
| 156 | }); | |
| 157 | ||
| 158 | // Call the original $.ui.mouse init method | |
| 159 | _mouseInit.call(self); | |
| 160 | }; | |
| 161 | ||
| 162 | /** | |
| 163 | * Remove the touch event handlers | |
| 164 | */ | |
| 165 | mouseProto._mouseDestroy = function () { | |
| 166 | ||
| 167 | var self = this; | |
| 168 | ||
| 169 | // Delegate the touch handlers to the widget's element | |
| 170 | self.element.unbind({ | |
| 171 | touchstart: $.proxy(self, '_touchStart'), | |
| 172 | touchmove: $.proxy(self, '_touchMove'), | |
| 173 | touchend: $.proxy(self, '_touchEnd') | |
| 174 | }); | |
| 175 | ||
| 176 | // Call the original $.ui.mouse destroy method | |
| 177 | _mouseDestroy.call(self); | |
| 178 | }; | |
| 179 | ||
| 180 | })(jQuery); | |
