kendo.mobile.scroller.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.mobile.scroller', [
'kendo.fx',
'kendo.draganddrop'
], f);
}(function () {
var __meta__ = {
id: 'mobile.scroller',
name: 'Scroller',
category: 'mobile',
description: 'The Kendo Mobile Scroller widget enables touch friendly kinetic scrolling for the contents of a given DOM element.',
depends: [
'fx',
'draganddrop'
]
};
(function ($, undefined) {
var kendo = window.kendo, mobile = kendo.mobile, fx = kendo.effects, ui = mobile.ui, proxy = $.proxy, extend = $.extend, Widget = ui.Widget, Class = kendo.Class, Movable = kendo.ui.Movable, Pane = kendo.ui.Pane, PaneDimensions = kendo.ui.PaneDimensions, Transition = fx.Transition, Animation = fx.Animation, abs = Math.abs, SNAPBACK_DURATION = 500, SCROLLBAR_OPACITY = 0.7, FRICTION = 0.96, VELOCITY_MULTIPLIER = 10, MAX_VELOCITY = 55, OUT_OF_BOUNDS_FRICTION = 0.5, ANIMATED_SCROLLER_PRECISION = 5, RELEASECLASS = 'km-scroller-release', REFRESHCLASS = 'km-scroller-refresh', PULL = 'pull', CHANGE = 'change', RESIZE = 'resize', SCROLL = 'scroll', MOUSE_WHEEL_ID = 2;
var ZoomSnapBack = Animation.extend({
init: function (options) {
var that = this;
Animation.fn.init.call(that);
extend(that, options);
that.userEvents.bind('gestureend', proxy(that.start, that));
that.tapCapture.bind('press', proxy(that.cancel, that));
},
enabled: function () {
return this.movable.scale < this.dimensions.minScale;
},
done: function () {
return this.dimensions.minScale - this.movable.scale < 0.01;
},
tick: function () {
var movable = this.movable;
movable.scaleWith(1.1);
this.dimensions.rescale(movable.scale);
},
onEnd: function () {
var movable = this.movable;
movable.scaleTo(this.dimensions.minScale);
this.dimensions.rescale(movable.scale);
}
});
var DragInertia = Animation.extend({
init: function (options) {
var that = this;
Animation.fn.init.call(that);
extend(that, options, {
transition: new Transition({
axis: options.axis,
movable: options.movable,
onEnd: function () {
that._end();
}
})
});
that.tapCapture.bind('press', function () {
that.cancel();
});
that.userEvents.bind('end', proxy(that.start, that));
that.userEvents.bind('gestureend', proxy(that.start, that));
that.userEvents.bind('tap', proxy(that.onEnd, that));
},
onCancel: function () {
this.transition.cancel();
},
freeze: function (location) {
var that = this;
that.cancel();
that._moveTo(location);
},
onEnd: function () {
var that = this;
if (that.paneAxis.outOfBounds()) {
that._snapBack();
} else {
that._end();
}
},
done: function () {
return abs(this.velocity) < 1;
},
start: function (e) {
var that = this, velocity;
if (!that.dimension.enabled) {
return;
}
if (that.paneAxis.outOfBounds()) {
that._snapBack();
} else {
velocity = e.touch.id === MOUSE_WHEEL_ID ? 0 : e.touch[that.axis].velocity;
that.velocity = Math.max(Math.min(velocity * that.velocityMultiplier, MAX_VELOCITY), -MAX_VELOCITY);
that.tapCapture.captureNext();
Animation.fn.start.call(that);
}
},
tick: function () {
var that = this, dimension = that.dimension, friction = that.paneAxis.outOfBounds() ? OUT_OF_BOUNDS_FRICTION : that.friction, delta = that.velocity *= friction, location = that.movable[that.axis] + delta;
if (!that.elastic && dimension.outOfBounds(location)) {
location = Math.max(Math.min(location, dimension.max), dimension.min);
that.velocity = 0;
}
that.movable.moveAxis(that.axis, location);
},
_end: function () {
this.tapCapture.cancelCapture();
this.end();
},
_snapBack: function () {
var that = this, dimension = that.dimension, snapBack = that.movable[that.axis] > dimension.max ? dimension.max : dimension.min;
that._moveTo(snapBack);
},
_moveTo: function (location) {
this.transition.moveTo({
location: location,
duration: SNAPBACK_DURATION,
ease: Transition.easeOutExpo
});
}
});
var AnimatedScroller = Animation.extend({
init: function (options) {
var that = this;
kendo.effects.Animation.fn.init.call(this);
extend(that, options, {
origin: {},
destination: {},
offset: {}
});
},
tick: function () {
this._updateCoordinates();
this.moveTo(this.origin);
},
done: function () {
return abs(this.offset.y) < ANIMATED_SCROLLER_PRECISION && abs(this.offset.x) < ANIMATED_SCROLLER_PRECISION;
},
onEnd: function () {
this.moveTo(this.destination);
if (this.callback) {
this.callback.call();
}
},
setCoordinates: function (from, to) {
this.offset = {};
this.origin = from;
this.destination = to;
},
setCallback: function (callback) {
if (callback && kendo.isFunction(callback)) {
this.callback = callback;
} else {
callback = undefined;
}
},
_updateCoordinates: function () {
this.offset = {
x: (this.destination.x - this.origin.x) / 4,
y: (this.destination.y - this.origin.y) / 4
};
this.origin = {
y: this.origin.y + this.offset.y,
x: this.origin.x + this.offset.x
};
}
});
var ScrollBar = Class.extend({
init: function (options) {
var that = this, horizontal = options.axis === 'x', element = $('<div class="km-touch-scrollbar km-' + (horizontal ? 'horizontal' : 'vertical') + '-scrollbar" />');
extend(that, options, {
element: element,
elementSize: 0,
movable: new Movable(element),
scrollMovable: options.movable,
alwaysVisible: options.alwaysVisible,
size: horizontal ? 'width' : 'height'
});
that.scrollMovable.bind(CHANGE, proxy(that.refresh, that));
that.container.append(element);
if (options.alwaysVisible) {
that.show();
}
},
refresh: function () {
var that = this, axis = that.axis, dimension = that.dimension, paneSize = dimension.size, scrollMovable = that.scrollMovable, sizeRatio = paneSize / dimension.total, position = Math.round(-scrollMovable[axis] * sizeRatio), size = Math.round(paneSize * sizeRatio);
if (sizeRatio >= 1) {
this.element.css('display', 'none');
} else {
this.element.css('display', '');
}
if (position + size > paneSize) {
size = paneSize - position;
} else if (position < 0) {
size += position;
position = 0;
}
if (that.elementSize != size) {
that.element.css(that.size, size + 'px');
that.elementSize = size;
}
that.movable.moveAxis(axis, position);
},
show: function () {
this.element.css({
opacity: SCROLLBAR_OPACITY,
visibility: 'visible'
});
},
hide: function () {
if (!this.alwaysVisible) {
this.element.css({ opacity: 0 });
}
}
});
var Scroller = Widget.extend({
init: function (element, options) {
var that = this;
Widget.fn.init.call(that, element, options);
element = that.element;
that._native = that.options.useNative && kendo.support.hasNativeScrolling;
if (that._native) {
element.addClass('km-native-scroller').prepend('<div class="km-scroll-header"/>');
extend(that, {
scrollElement: element,
fixedContainer: element.children().first()
});
return;
}
element.css('overflow', 'hidden').addClass('km-scroll-wrapper').wrapInner('<div class="km-scroll-container"/>').prepend('<div class="km-scroll-header"/>');
var inner = element.children().eq(1), tapCapture = new kendo.TapCapture(element), movable = new Movable(inner), dimensions = new PaneDimensions({
element: inner,
container: element,
forcedEnabled: that.options.zoom
}), avoidScrolling = this.options.avoidScrolling, userEvents = new kendo.UserEvents(element, {
fastTap: true,
allowSelection: true,
preventDragEvent: true,
captureUpIfMoved: true,
multiTouch: that.options.zoom,
start: function (e) {
dimensions.refresh();
var velocityX = abs(e.x.velocity), velocityY = abs(e.y.velocity), horizontalSwipe = velocityX * 2 >= velocityY, originatedFromFixedContainer = $.contains(that.fixedContainer[0], e.event.target), verticalSwipe = velocityY * 2 >= velocityX;
if (!originatedFromFixedContainer && !avoidScrolling(e) && that.enabled && (dimensions.x.enabled && horizontalSwipe || dimensions.y.enabled && verticalSwipe)) {
userEvents.capture();
} else {
userEvents.cancel();
}
}
}), pane = new Pane({
movable: movable,
dimensions: dimensions,
userEvents: userEvents,
elastic: that.options.elastic
}), zoomSnapBack = new ZoomSnapBack({
movable: movable,
dimensions: dimensions,
userEvents: userEvents,
tapCapture: tapCapture
}), animatedScroller = new AnimatedScroller({
moveTo: function (coordinates) {
that.scrollTo(coordinates.x, coordinates.y);
}
});
movable.bind(CHANGE, function () {
that.scrollTop = -movable.y;
that.scrollLeft = -movable.x;
that.trigger(SCROLL, {
scrollTop: that.scrollTop,
scrollLeft: that.scrollLeft
});
});
if (that.options.mousewheelScrolling) {
element.on('DOMMouseScroll mousewheel', proxy(this, '_wheelScroll'));
}
extend(that, {
movable: movable,
dimensions: dimensions,
zoomSnapBack: zoomSnapBack,
animatedScroller: animatedScroller,
userEvents: userEvents,
pane: pane,
tapCapture: tapCapture,
pulled: false,
enabled: true,
scrollElement: inner,
scrollTop: 0,
scrollLeft: 0,
fixedContainer: element.children().first()
});
that._initAxis('x');
that._initAxis('y');
that._wheelEnd = function () {
that._wheel = false;
that.userEvents.end(0, that._wheelY);
};
dimensions.refresh();
if (that.options.pullToRefresh) {
that._initPullToRefresh();
}
},
_wheelScroll: function (e) {
if (!this._wheel) {
this._wheel = true;
this._wheelY = 0;
this.userEvents.press(0, this._wheelY);
}
clearTimeout(this._wheelTimeout);
this._wheelTimeout = setTimeout(this._wheelEnd, 50);
var delta = kendo.wheelDeltaY(e);
if (delta) {
this._wheelY += delta;
this.userEvents.move(0, this._wheelY);
}
e.preventDefault();
},
makeVirtual: function () {
this.dimensions.y.makeVirtual();
},
virtualSize: function (min, max) {
this.dimensions.y.virtualSize(min, max);
},
height: function () {
return this.dimensions.y.size;
},
scrollHeight: function () {
return this.scrollElement[0].scrollHeight;
},
scrollWidth: function () {
return this.scrollElement[0].scrollWidth;
},
options: {
name: 'Scroller',
zoom: false,
pullOffset: 140,
visibleScrollHints: false,
elastic: true,
useNative: false,
mousewheelScrolling: true,
avoidScrolling: function () {
return false;
},
pullToRefresh: false,
messages: {
pullTemplate: 'Pull to refresh',
releaseTemplate: 'Release to refresh',
refreshTemplate: 'Refreshing'
}
},
events: [
PULL,
SCROLL,
RESIZE
],
_resize: function () {
if (!this._native) {
this.contentResized();
}
},
setOptions: function (options) {
var that = this;
Widget.fn.setOptions.call(that, options);
if (options.pullToRefresh) {
that._initPullToRefresh();
}
},
reset: function () {
if (this._native) {
this.scrollElement.scrollTop(0);
} else {
this.movable.moveTo({
x: 0,
y: 0
});
this._scale(1);
}
},
contentResized: function () {
this.dimensions.refresh();
if (this.pane.x.outOfBounds()) {
this.movable.moveAxis('x', this.dimensions.x.min);
}
if (this.pane.y.outOfBounds()) {
this.movable.moveAxis('y', this.dimensions.y.min);
}
},
zoomOut: function () {
var dimensions = this.dimensions;
dimensions.refresh();
this._scale(dimensions.fitScale);
this.movable.moveTo(dimensions.centerCoordinates());
},
enable: function () {
this.enabled = true;
},
disable: function () {
this.enabled = false;
},
scrollTo: function (x, y) {
if (this._native) {
this.scrollElement.scrollLeft(abs(x));
this.scrollElement.scrollTop(abs(y));
} else {
this.dimensions.refresh();
this.movable.moveTo({
x: x,
y: y
});
}
},
animatedScrollTo: function (x, y, callback) {
var from, to;
if (this._native) {
this.scrollTo(x, y);
} else {
from = {
x: this.movable.x,
y: this.movable.y
};
to = {
x: x,
y: y
};
this.animatedScroller.setCoordinates(from, to);
this.animatedScroller.setCallback(callback);
this.animatedScroller.start();
}
},
pullHandled: function () {
var that = this;
that.refreshHint.removeClass(REFRESHCLASS);
that.hintContainer.html(that.pullTemplate({}));
that.yinertia.onEnd();
that.xinertia.onEnd();
that.userEvents.cancel();
},
destroy: function () {
Widget.fn.destroy.call(this);
if (this.userEvents) {
this.userEvents.destroy();
}
},
_scale: function (scale) {
this.dimensions.rescale(scale);
this.movable.scaleTo(scale);
},
_initPullToRefresh: function () {
var that = this;
that.dimensions.y.forceEnabled();
that.pullTemplate = kendo.template(that.options.messages.pullTemplate);
that.releaseTemplate = kendo.template(that.options.messages.releaseTemplate);
that.refreshTemplate = kendo.template(that.options.messages.refreshTemplate);
that.scrollElement.prepend('<span class="km-scroller-pull"><span class="km-icon"></span><span class="km-loading-left"></span><span class="km-loading-right"></span><span class="km-template">' + that.pullTemplate({}) + '</span></span>');
that.refreshHint = that.scrollElement.children().first();
that.hintContainer = that.refreshHint.children('.km-template');
that.pane.y.bind('change', proxy(that._paneChange, that));
that.userEvents.bind('end', proxy(that._dragEnd, that));
},
_dragEnd: function () {
var that = this;
if (!that.pulled) {
return;
}
that.pulled = false;
that.refreshHint.removeClass(RELEASECLASS).addClass(REFRESHCLASS);
that.hintContainer.html(that.refreshTemplate({}));
that.yinertia.freeze(that.options.pullOffset / 2);
that.trigger('pull');
},
_paneChange: function () {
var that = this;
if (that.movable.y / OUT_OF_BOUNDS_FRICTION > that.options.pullOffset) {
if (!that.pulled) {
that.pulled = true;
that.refreshHint.removeClass(REFRESHCLASS).addClass(RELEASECLASS);
that.hintContainer.html(that.releaseTemplate({}));
}
} else if (that.pulled) {
that.pulled = false;
that.refreshHint.removeClass(RELEASECLASS);
that.hintContainer.html(that.pullTemplate({}));
}
},
_initAxis: function (axis) {
var that = this, movable = that.movable, dimension = that.dimensions[axis], tapCapture = that.tapCapture, paneAxis = that.pane[axis], scrollBar = new ScrollBar({
axis: axis,
movable: movable,
dimension: dimension,
container: that.element,
alwaysVisible: that.options.visibleScrollHints
});
dimension.bind(CHANGE, function () {
scrollBar.refresh();
});
paneAxis.bind(CHANGE, function () {
scrollBar.show();
});
that[axis + 'inertia'] = new DragInertia({
axis: axis,
paneAxis: paneAxis,
movable: movable,
tapCapture: tapCapture,
userEvents: that.userEvents,
dimension: dimension,
elastic: that.options.elastic,
friction: that.options.friction || FRICTION,
velocityMultiplier: that.options.velocityMultiplier || VELOCITY_MULTIPLIER,
end: function () {
scrollBar.hide();
that.trigger('scrollEnd', {
axis: axis,
scrollTop: that.scrollTop,
scrollLeft: that.scrollLeft
});
}
});
}
});
ui.plugin(Scroller);
}(window.kendo.jQuery));
return window.kendo;
}, typeof define == 'function' && define.amd ? define : function (a1, a2, a3) {
(a3 || a2)();
}));