kendo.touch.js
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/**
* Kendo UI v2016.1.112 (http://www.telerik.com/kendo-ui)
* Copyright 2016 Telerik AD. All rights reserved.
*
* Kendo UI commercial licenses may be obtained at
* http://www.telerik.com/purchase/license-agreement/kendo-ui-complete
* If you do not own a commercial license, this file shall be governed by the trial license terms.
*/
(function (f, define) {
define('kendo.touch', [
'kendo.core',
'kendo.userevents'
], f);
}(function () {
var __meta__ = {
id: 'touch',
name: 'Touch',
category: 'mobile',
description: 'The kendo Touch widget provides a cross-platform compatible API for handling user-initiated touch events, multi-touch gestures and event sequences (drag, swipe, etc.). ',
depends: [
'core',
'userevents'
]
};
(function ($, undefined) {
var kendo = window.kendo, Widget = kendo.ui.Widget, proxy = $.proxy, abs = Math.abs, MAX_DOUBLE_TAP_DISTANCE = 20;
var Touch = Widget.extend({
init: function (element, options) {
var that = this;
Widget.fn.init.call(that, element, options);
options = that.options;
element = that.element;
that.wrapper = element;
function eventProxy(name) {
return function (e) {
that._triggerTouch(name, e);
};
}
function gestureEventProxy(name) {
return function (e) {
that.trigger(name, {
touches: e.touches,
distance: e.distance,
center: e.center,
event: e.event
});
};
}
that.events = new kendo.UserEvents(element, {
filter: options.filter,
surface: options.surface,
minHold: options.minHold,
multiTouch: options.multiTouch,
allowSelection: true,
fastTap: options.fastTap,
press: eventProxy('touchstart'),
hold: eventProxy('hold'),
tap: proxy(that, '_tap'),
gesturestart: gestureEventProxy('gesturestart'),
gesturechange: gestureEventProxy('gesturechange'),
gestureend: gestureEventProxy('gestureend')
});
if (options.enableSwipe) {
that.events.bind('start', proxy(that, '_swipestart'));
that.events.bind('move', proxy(that, '_swipemove'));
} else {
that.events.bind('start', proxy(that, '_dragstart'));
that.events.bind('move', eventProxy('drag'));
that.events.bind('end', eventProxy('dragend'));
}
kendo.notify(that);
},
events: [
'touchstart',
'dragstart',
'drag',
'dragend',
'tap',
'doubletap',
'hold',
'swipe',
'gesturestart',
'gesturechange',
'gestureend'
],
options: {
name: 'Touch',
surface: null,
global: false,
fastTap: false,
multiTouch: false,
enableSwipe: false,
minXDelta: 30,
maxYDelta: 20,
maxDuration: 1000,
minHold: 800,
doubleTapTimeout: 800
},
cancel: function () {
this.events.cancel();
},
_triggerTouch: function (type, e) {
if (this.trigger(type, {
touch: e.touch,
event: e.event
})) {
e.preventDefault();
}
},
_tap: function (e) {
var that = this, lastTap = that.lastTap, touch = e.touch;
if (lastTap && touch.endTime - lastTap.endTime < that.options.doubleTapTimeout && kendo.touchDelta(touch, lastTap).distance < MAX_DOUBLE_TAP_DISTANCE) {
that._triggerTouch('doubletap', e);
that.lastTap = null;
} else {
that._triggerTouch('tap', e);
that.lastTap = touch;
}
},
_dragstart: function (e) {
this._triggerTouch('dragstart', e);
},
_swipestart: function (e) {
if (abs(e.x.velocity) * 2 >= abs(e.y.velocity)) {
e.sender.capture();
}
},
_swipemove: function (e) {
var that = this, options = that.options, touch = e.touch, duration = e.event.timeStamp - touch.startTime, direction = touch.x.initialDelta > 0 ? 'right' : 'left';
if (abs(touch.x.initialDelta) >= options.minXDelta && abs(touch.y.initialDelta) < options.maxYDelta && duration < options.maxDuration) {
that.trigger('swipe', {
direction: direction,
touch: e.touch
});
touch.cancel();
}
}
});
kendo.ui.plugin(Touch);
}(window.kendo.jQuery));
return window.kendo;
}, typeof define == 'function' && define.amd ? define : function (a1, a2, a3) {
(a3 || a2)();
}));