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\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n*/\n(function (f, define) {\n define('kendo.mobile.scroller', [\n 'kendo.fx',\n 'kendo.draganddrop'\n ], f);\n}(function () {\n var __meta__ = {\n id: 'mobile.scroller',\n name: 'Scroller',\n category: 'mobile',\n description: 'The Kendo Mobile Scroller widget enables touch friendly kinetic scrolling for the contents of a given DOM element.',\n depends: [\n 'fx',\n 'draganddrop'\n ]\n };\n (function ($, undefined) {\n 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;\n var ZoomSnapBack = Animation.extend({\n init: function (options) {\n var that = this;\n Animation.fn.init.call(that);\n extend(that, options);\n that.userEvents.bind('gestureend', proxy(that.start, that));\n that.tapCapture.bind('press', proxy(that.cancel, that));\n },\n enabled: function () {\n return this.movable.scale < this.dimensions.minScale;\n },\n done: function () {\n return this.dimensions.minScale - this.movable.scale < 0.01;\n },\n tick: function () {\n var movable = this.movable;\n movable.scaleWith(1.1);\n this.dimensions.rescale(movable.scale);\n },\n onEnd: function () {\n var movable = this.movable;\n movable.scaleTo(this.dimensions.minScale);\n this.dimensions.rescale(movable.scale);\n }\n });\n var DragInertia = Animation.extend({\n init: function (options) {\n var that = this;\n Animation.fn.init.call(that);\n extend(that, options, {\n transition: new Transition({\n axis: options.axis,\n movable: options.movable,\n onEnd: function () {\n that._end();\n }\n })\n });\n that.tapCapture.bind('press', function () {\n that.cancel();\n });\n that.userEvents.bind('end', proxy(that.start, that));\n that.userEvents.bind('gestureend', proxy(that.start, that));\n that.userEvents.bind('tap', proxy(that.onEnd, that));\n },\n onCancel: function () {\n this.transition.cancel();\n },\n freeze: function (location) {\n var that = this;\n that.cancel();\n that._moveTo(location);\n },\n onEnd: function () {\n var that = this;\n if (that.paneAxis.outOfBounds()) {\n that._snapBack();\n } else {\n that._end();\n }\n },\n done: function () {\n return abs(this.velocity) < 1;\n },\n start: function (e) {\n var that = this, velocity;\n if (!that.dimension.enabled) {\n return;\n }\n if (that.paneAxis.outOfBounds()) {\n if (that.transition._started) {\n that.transition.cancel();\n that.velocity = Math.min(e.touch[that.axis].velocity * that.velocityMultiplier, MAX_VELOCITY);\n Animation.fn.start.call(that);\n } else {\n that._snapBack();\n }\n } else {\n velocity = e.touch.id === MOUSE_WHEEL_ID ? 0 : e.touch[that.axis].velocity;\n that.velocity = Math.max(Math.min(velocity * that.velocityMultiplier, MAX_VELOCITY), -MAX_VELOCITY);\n that.tapCapture.captureNext();\n Animation.fn.start.call(that);\n }\n },\n tick: function () {\n 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;\n if (!that.elastic && dimension.outOfBounds(location)) {\n location = Math.max(Math.min(location, dimension.max), dimension.min);\n that.velocity = 0;\n }\n that.movable.moveAxis(that.axis, location);\n },\n _end: function () {\n this.tapCapture.cancelCapture();\n this.end();\n },\n _snapBack: function () {\n var that = this, dimension = that.dimension, snapBack = that.movable[that.axis] > dimension.max ? dimension.max : dimension.min;\n that._moveTo(snapBack);\n },\n _moveTo: function (location) {\n this.transition.moveTo({\n location: location,\n duration: SNAPBACK_DURATION,\n ease: Transition.easeOutExpo\n });\n }\n });\n var AnimatedScroller = Animation.extend({\n init: function (options) {\n var that = this;\n kendo.effects.Animation.fn.init.call(this);\n extend(that, options, {\n origin: {},\n destination: {},\n offset: {}\n });\n },\n tick: function () {\n this._updateCoordinates();\n this.moveTo(this.origin);\n },\n done: function () {\n return abs(this.offset.y) < ANIMATED_SCROLLER_PRECISION && abs(this.offset.x) < ANIMATED_SCROLLER_PRECISION;\n },\n onEnd: function () {\n this.moveTo(this.destination);\n if (this.callback) {\n this.callback.call();\n }\n },\n setCoordinates: function (from, to) {\n this.offset = {};\n this.origin = from;\n this.destination = to;\n },\n setCallback: function (callback) {\n if (callback && kendo.isFunction(callback)) {\n this.callback = callback;\n } else {\n callback = undefined;\n }\n },\n _updateCoordinates: function () {\n this.offset = {\n x: (this.destination.x - this.origin.x) / 4,\n y: (this.destination.y - this.origin.y) / 4\n };\n this.origin = {\n y: this.origin.y + this.offset.y,\n x: this.origin.x + this.offset.x\n };\n }\n });\n var ScrollBar = Class.extend({\n init: function (options) {\n var that = this, horizontal = options.axis === 'x', element = $('
');\n if (horizontal) {\n element.attr('aria-orientation', 'horizontal');\n }\n extend(that, options, {\n element: element,\n elementSize: 0,\n movable: new Movable(element),\n scrollMovable: options.movable,\n alwaysVisible: options.alwaysVisible,\n size: horizontal ? 'width' : 'height'\n });\n that.scrollMovable.bind(CHANGE, proxy(that.refresh, that));\n that.container.append(element);\n if (options.alwaysVisible) {\n that.show();\n }\n },\n refresh: function () {\n 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);\n if (sizeRatio >= 1) {\n this.element.css('display', 'none');\n } else {\n this.element.css('display', '');\n }\n if (position + size > paneSize) {\n size = paneSize - position;\n } else if (position < 0) {\n size += position;\n position = 0;\n }\n if (that.elementSize != size) {\n that.element.css(that.size, size + 'px');\n that.elementSize = size;\n }\n that._ariaValue(position, dimension.size - that.elementSize);\n that.movable.moveAxis(axis, position);\n },\n show: function () {\n this.element.css({\n opacity: SCROLLBAR_OPACITY,\n visibility: 'visible'\n });\n },\n hide: function () {\n if (!this.alwaysVisible) {\n this.element.css({ opacity: 0 });\n }\n },\n _ariaValue: function (current, total) {\n var element = this.element;\n if (current > total) {\n current = total;\n }\n element.attr('aria-valuemax', total);\n element.attr('aria-valuenow', current);\n }\n });\n var Scroller = Widget.extend({\n init: function (element, options) {\n var that = this;\n Widget.fn.init.call(that, element, options);\n element = that.element;\n that._native = that.options.useNative && kendo.support.hasNativeScrolling;\n if (that._native) {\n element.addClass('km-native-scroller').prepend('