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/*! | ||
* jQuery UI Touch Punch 0.2.3 | ||
* | ||
* Copyright 2011–2014, Dave Furfero | ||
* Dual licensed under the MIT or GPL Version 2 licenses. | ||
* | ||
* Depends: | ||
* jquery.ui.widget.js | ||
* jquery.ui.mouse.js | ||
*/ | ||
(function ($) { | ||
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// Detect touch support | ||
$.support.touch = 'ontouchend' in document; | ||
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// Ignore browsers without touch support | ||
if (!$.support.touch) { | ||
return; | ||
} | ||
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var mouseProto = $.ui.mouse.prototype, | ||
_mouseInit = mouseProto._mouseInit, | ||
_mouseDestroy = mouseProto._mouseDestroy, | ||
touchHandled; | ||
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/** | ||
* Simulate a mouse event based on a corresponding touch event | ||
* @param {Object} event A touch event | ||
* @param {String} simulatedType The corresponding mouse event | ||
*/ | ||
function simulateMouseEvent (event, simulatedType) { | ||
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// Ignore multi-touch events | ||
if (event.originalEvent.touches.length > 1) { | ||
return; | ||
} | ||
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event.preventDefault(); | ||
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var touch = event.originalEvent.changedTouches[0], | ||
simulatedEvent = document.createEvent('MouseEvents'); | ||
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// Initialize the simulated mouse event using the touch event's coordinates | ||
simulatedEvent.initMouseEvent( | ||
simulatedType, // type | ||
true, // bubbles | ||
true, // cancelable | ||
window, // view | ||
1, // detail | ||
touch.screenX, // screenX | ||
touch.screenY, // screenY | ||
touch.clientX, // clientX | ||
touch.clientY, // clientY | ||
false, // ctrlKey | ||
false, // altKey | ||
false, // shiftKey | ||
false, // metaKey | ||
0, // button | ||
null // relatedTarget | ||
); | ||
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// Dispatch the simulated event to the target element | ||
event.target.dispatchEvent(simulatedEvent); | ||
} | ||
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/** | ||
* Handle the jQuery UI widget's touchstart events | ||
* @param {Object} event The widget element's touchstart event | ||
*/ | ||
mouseProto._touchStart = function (event) { | ||
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var self = this; | ||
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// Ignore the event if another widget is already being handled | ||
if (touchHandled || !self._mouseCapture(event.originalEvent.changedTouches[0])) { | ||
return; | ||
} | ||
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// Set the flag to prevent other widgets from inheriting the touch event | ||
touchHandled = true; | ||
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// Track movement to determine if interaction was a click | ||
self._touchMoved = false; | ||
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// Simulate the mouseover event | ||
simulateMouseEvent(event, 'mouseover'); | ||
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// Simulate the mousemove event | ||
simulateMouseEvent(event, 'mousemove'); | ||
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// Simulate the mousedown event | ||
simulateMouseEvent(event, 'mousedown'); | ||
}; | ||
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/** | ||
* Handle the jQuery UI widget's touchmove events | ||
* @param {Object} event The document's touchmove event | ||
*/ | ||
mouseProto._touchMove = function (event) { | ||
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// Ignore event if not handled | ||
if (!touchHandled) { | ||
return; | ||
} | ||
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// Interaction was not a click | ||
this._touchMoved = true; | ||
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// Simulate the mousemove event | ||
simulateMouseEvent(event, 'mousemove'); | ||
}; | ||
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/** | ||
* Handle the jQuery UI widget's touchend events | ||
* @param {Object} event The document's touchend event | ||
*/ | ||
mouseProto._touchEnd = function (event) { | ||
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// Ignore event if not handled | ||
if (!touchHandled) { | ||
return; | ||
} | ||
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// Simulate the mouseup event | ||
simulateMouseEvent(event, 'mouseup'); | ||
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// Simulate the mouseout event | ||
simulateMouseEvent(event, 'mouseout'); | ||
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// If the touch interaction did not move, it should trigger a click | ||
if (!this._touchMoved) { | ||
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// Simulate the click event | ||
simulateMouseEvent(event, 'click'); | ||
} | ||
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// Unset the flag to allow other widgets to inherit the touch event | ||
touchHandled = false; | ||
}; | ||
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/** | ||
* A duck punch of the $.ui.mouse _mouseInit method to support touch events. | ||
* This method extends the widget with bound touch event handlers that | ||
* translate touch events to mouse events and pass them to the widget's | ||
* original mouse event handling methods. | ||
*/ | ||
mouseProto._mouseInit = function () { | ||
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var self = this; | ||
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// Delegate the touch handlers to the widget's element | ||
self.element.bind({ | ||
touchstart: $.proxy(self, '_touchStart'), | ||
touchmove: $.proxy(self, '_touchMove'), | ||
touchend: $.proxy(self, '_touchEnd') | ||
}); | ||
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// Call the original $.ui.mouse init method | ||
_mouseInit.call(self); | ||
}; | ||
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/** | ||
* Remove the touch event handlers | ||
*/ | ||
mouseProto._mouseDestroy = function () { | ||
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var self = this; | ||
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// Delegate the touch handlers to the widget's element | ||
self.element.unbind({ | ||
touchstart: $.proxy(self, '_touchStart'), | ||
touchmove: $.proxy(self, '_touchMove'), | ||
touchend: $.proxy(self, '_touchEnd') | ||
}); | ||
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// Call the original $.ui.mouse destroy method | ||
_mouseDestroy.call(self); | ||
}; | ||
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})(jQuery); |