@progress/kendo-ui/js/kendo.dropdowntree-BJXUN4m8.js

This package is part of the [Kendo UI for jQuery](http://www.telerik.com/kendo-ui) suite.

const require_dropdowns_loader = require('./dropdowns-loader-Ct0fKyLR.js');
const require_valueMapper = require('./valueMapper-CMu0c73J.js');

//#region ../src/dropdowntree/treeview.js
(function($, undefined) {
	var kendo = window.kendo, ui = kendo.ui, keys = kendo.keys, DISABLED = "k-disabled", SELECT = "select", CHECKED = "checked", DATABOUND = "dataBound", CLICK = "click", NS = ".kendoTreeView", INDETERMINATE = "indeterminate", NAVIGATE = "navigate", subGroup, TreeView = ui.TreeView;
	function contentChild(filter) {
		return function(node) {
			var result = node.children(".k-animation-container");
			if (!result.length) {
				result = node;
			}
			return result.children(filter);
		};
	}
	subGroup = contentChild(".k-treeview-group");
	var Tree = TreeView.extend({
		init: function(element, options, dropdowntree) {
			var that = this;
			that.dropdowntree = dropdowntree;
			TreeView.fn.init.call(that, element, options);
			if (that.dropdowntree._isMultipleSelection()) {
				that.wrapper.on(CLICK + NS, ".k-treeview-item-content.k-selected .k-treeview-leaf", that._clickSelectedItem.bind(that));
			}
		},
		_checkOnSelect: function(e) {
			if (!e.isDefaultPrevented()) {
				var dataItem = this.dataItem(e.node);
				dataItem.set("checked", !dataItem.checked);
			}
		},
		_setCheckedValue: function(node, value) {
			node.set(CHECKED, value);
		},
		_click: function(e) {
			var that = this;
			if (that.dropdowntree._isMultipleSelection()) {
				that.one("select", that._checkOnSelect);
			}
			TreeView.fn._click.call(that, e);
		},
		_clickSelectedItem: function(e) {
			var that = this, node = $(e.currentTarget), dataItem = this.dataItem(node);
			if (!that._trigger(SELECT, node)) {
				dataItem.set("checked", !dataItem.checked);
				that.dataItem(node).set("selected", false);
			}
		},
		defaultrefresh: function(e) {
			var that = this;
			var node = e.node;
			var action = e.action;
			var items = e.items;
			var parentNode = this.wrapper;
			var options = this.options;
			var loadOnDemand = options.loadOnDemand;
			var checkChildren = options.checkboxes && options.checkboxes.checkChildren;
			var i;
			if (this._skip) {
				return;
			}
			if (e.field) {
				if (!items[0] || !items[0].level) {
					return;
				}
				return this._updateNodes(items, e.field);
			}
			if (node) {
				parentNode = this.findByUid(node.uid);
				this._progress(parentNode, false);
			}
			if (checkChildren && action != "remove") {
				var bubble = false;
				for (i = 0; i < items.length; i++) {
					if ("checked" in items[i]) {
						bubble = true;
						break;
					}
				}
				if (!bubble && node && node.checked) {
					for (i = 0; i < items.length; i++) {
						items[i].checked = true;
					}
				}
			}
			if (action == "add") {
				this._appendItems(e.index, items, parentNode);
			} else if (action == "remove") {
				this._remove(this.findByUid(items[0].uid), false);
			} else if (action == "itemchange") {
				this._updateNodes(items);
			} else if (action == "itemloaded") {
				this._refreshChildren(parentNode, items, e.index);
			} else {
				this._refreshRoot(items);
			}
			if (action != "remove") {
				for (i = 0; i < items.length; i++) {
					if (!loadOnDemand || items[i].expanded) {
						items[i].load();
					}
				}
			}
			that.wrapper.find(">ul").attr("role", "tree");
			this._applyLevelStyles();
			this.trigger(DATABOUND, { node: node ? parentNode : undefined });
			this.dropdowntree._treeViewDataBound({
				node: node ? parentNode : undefined,
				sender: this
			});
			if (this.options.checkboxes.checkChildren) {
				this.updateIndeterminate();
			}
		},
		_previousVisible: function(node) {
			var that = this, lastChild, result;
			if (!node.length || node.prev().length) {
				if (node.length) {
					result = node.prev();
				} else {
					result = that.root.children().last();
				}
				while (that._expanded(result)) {
					lastChild = subGroup(result).children().last();
					if (!lastChild.length) {
						break;
					}
					result = lastChild;
				}
			} else {
				result = that.parent(node) || node;
				if (!result.length) {
					if (that.dropdowntree.checkAll && that.dropdowntree.checkAll.is(":visible")) {
						that.dropdowntree.checkAll.find(".k-checkbox").trigger("focus");
					} else if (that.dropdowntree.filterInput) {
						that.dropdowntree.filterInput.trigger("focus");
					} else {
						that.dropdowntree.wrapper.trigger("focus");
					}
				}
			}
			return result;
		},
		_keydown: function(e) {
			var that = this, key = e.keyCode, target, focused = that.current(), expanded = that._expanded(focused), checkbox = focused.find(".k-checkbox-wrap").first().find(":checkbox"), rtl = kendo.support.isRtl(that.element);
			if (e.target != e.currentTarget) {
				return;
			}
			if (!rtl && key == keys.RIGHT || rtl && key == keys.LEFT) {
				if (expanded) {
					target = that._nextVisible(focused);
				} else if (!focused.find(".k-treeview-item-content").first().hasClass(DISABLED)) {
					that.expand(focused);
				}
			} else if (!rtl && key == keys.LEFT || rtl && key == keys.RIGHT) {
				if (expanded && !focused.find(".k-treeview-item-content").first().hasClass(DISABLED)) {
					that.collapse(focused);
				} else {
					target = that.parent(focused);
					if (!that._enabled(target)) {
						target = undefined;
					}
				}
			} else if (key == keys.DOWN) {
				target = that._nextVisible(focused);
			} else if (key == keys.UP && !e.altKey) {
				target = that._previousVisible(focused);
			} else if (key == keys.HOME) {
				target = that._nextVisible($());
			} else if (key == keys.END) {
				target = that._previousVisible($());
			} else if (key == keys.ENTER && !focused.find(".k-treeview-item-content").first().hasClass(DISABLED)) {
				if (!focused.find(".k-treeview-item-content").first().hasClass("k-selected")) {
					if (!that._trigger(SELECT, focused)) {
						that.select(focused);
					}
				}
			} else if (key == keys.SPACEBAR && checkbox.length && !focused.find(".k-treeview-item-content").first().hasClass(DISABLED)) {
				checkbox.prop(CHECKED, !checkbox.prop(CHECKED)).data(INDETERMINATE, false).prop(INDETERMINATE, false);
				that._checkboxChange({ target: checkbox });
				target = focused;
			} else if (e.altKey && key === keys.UP || key === keys.ESC) {
				that._closePopup();
			} else if (key === keys.TAB) {
				e.preventDefault();
				that._closePopup();
			}
			if (target) {
				e.preventDefault();
				if (focused[0] != target[0]) {
					that._trigger(NAVIGATE, target);
					that.current(target);
					that.scrollTo(target);
				}
			}
		},
		_closePopup: function() {
			this.dropdowntree.close();
			this.dropdowntree.wrapper.trigger("focus");
		},
		refresh: function(e) {
			this.defaultrefresh(e);
			if (this.dropdowntree.options.skipUpdateOnBind) {
				return;
			}
			if (e.action === "itemchange") {
				if (this.dropdowntree._isMultipleSelection()) {
					if (e.field === "checked") {
						this.dropdowntree._checkValue(e.items[0]);
					}
				} else if (e.field !== "checked" && e.field !== "expanded" && e.items[0].selected) {
					this.dropdowntree._selectValue(e.items[0]);
				}
			} else {
				this.dropdowntree.refresh(e);
			}
		}
	});
	kendo.ui._dropdowntree = Tree;
})(window.kendo.jQuery);

//#endregion
//#region ../src/kendo.dropdowntree.js
const __meta__ = {
	id: "dropdowntree",
	name: "DropDownTree",
	category: "web",
	description: "The DropDownTree widget displays a hierarchy of items and allows the selection of single or multiple items.",
	depends: [
		"treeview",
		"popup",
		"binder",
		"html.chip",
		"html.chiplist",
		"html.button",
		"html.input",
		"label",
		"icons",
		"actionsheet"
	]
};
(function($, undefined) {
	var kendo = window.kendo, ui = kendo.ui, html = kendo.html, encode = kendo.htmlEncode, mediaQuery = kendo.mediaQuery, Widget = ui.Widget, TreeView = ui._dropdowntree, ObservableArray = kendo.data.ObservableArray, ObservableObject = kendo.data.ObservableObject, extend = $.extend, activeElement = kendo._activeElement, ns = ".kendoDropDownTree", keys = kendo.keys, support = kendo.support, HIDDENCLASS = "k-hidden", WIDTH = "width", browser = support.browser, outerWidth = kendo._outerWidth, DOT = ".", DISABLED = "disabled", READONLY = "readonly", STATEDISABLED = "k-disabled", ARIA_DISABLED = "aria-disabled", HOVER = "k-hover", FOCUSED = "k-focus", HOVEREVENTS = "mouseenter" + ns + " mouseleave" + ns, TABINDEX = "tabindex", CLICK = "click", OPEN = "open", CLOSE = "close", CHANGE = "change", quotRegExp = /"/g, CHIP = ".k-chip";
	function getterFunction(field) {
		if (Array.isArray(field)) {
			var count = field.length;
			var levels = $.map(field, function(x) {
				return function(d) {
					return d[x];
				};
			});
			return function(dataItem) {
				var level = dataItem._level;
				if (!level && level !== 0) {
					return;
				}
				return levels[Math.min(level, count - 1)](dataItem);
			};
		} else {
			return kendo.getter(field);
		}
	}
	var DropDownTree = kendo.ui.Widget.extend({
		init: function(element, options) {
			var that = this;
			that.ns = ns;
			kendo.ui.Widget.fn.init.call(that, element, options);
			that._selection = that._getSelection();
			that._focusInputHandler = that._focusInput.bind(that);
			that._initial = that.element.val();
			that._values = [];
			var value = this.options.value;
			if (value === null || !value.length) {
				this._noInitialValue = true;
			}
			if (!this._isNullorUndefined(value)) {
				this._valueMethodCalled = true;
				value = this._isArrayOfObjects(value) && that.options.autoBind ? value.map((x) => x[that.options.dataValueField]) : value;
				this._values = Array.isArray(value) ? value.slice(0) : [value];
			}
			that.bigScreenMQL = mediaQuery("large");
			that.smallScreenMQL = mediaQuery("small");
			if (that.options.adaptiveMode == "auto") {
				that.smallScreenMQL.onChange(function() {
					if (that.popup && kendo.isFunction(that.popup.fullscreen)) {
						that.popup.fullscreen(that.smallScreenMQL.mediaQueryList.matches);
					}
				});
			}
			this._bindLoader();
			this._inputTemplate();
			this._accessors();
			this._setTreeViewOptions(this.options);
			this._dataSource();
			this._selection._initWrapper();
			this._applyCssClasses();
			this._placeholder(true);
			this._tabindex();
			this.wrapper.data(TABINDEX, this.wrapper.attr(TABINDEX));
			this.tree = $("<div/>").attr({
				tabIndex: -1,
				"aria-hidden": true
			});
			this.list = $("<div/>").append(this.tree);
			this._header();
			this._noData();
			this._footer();
			this._reset();
			this._popup();
			if (that.options.adaptiveMode == "auto") {
				that.bigScreenMQL.onChange(() => {
					that.list = $("<div class='k-list-container'/>").append(that.tree);
					that._header.bind(that)();
					that._noData.bind(that)();
					that._footer.bind(that)();
					that._reset.bind(that)();
					if (that.popup) {
						if (that.popup.wrapper) {
							that.popup.wrapper.remove();
						}
						that.popup.destroy();
						that.popup.element.remove();
						that.popup = null;
					}
					if (that.treeview) {
						that.treeview.destroy();
					}
					that._popup.bind(that)();
					that._filterHeader.bind(that)();
					that._treeview.bind(that)();
					that._renderFooter.bind(that)();
					that._checkAll.bind(that)();
					that._enable.bind(that)();
					that._toggleCloseVisibility.bind(that)();
					that._aria.bind(that)();
				});
			}
			this._clearButton();
			this._filterHeader();
			this._treeview();
			this._renderFooter();
			this._checkAll();
			this._enable();
			this._toggleCloseVisibility();
			if (!this.options.autoBind) {
				var text = options.text || "";
				if (!this._isNullorUndefined(options.value)) {
					this._preselect(options.value);
				} else if (text) {
					this._textAccessor(text);
				} else if (options.placeholder) {
					this._placeholder(true);
				}
			}
			var disabled = $(this.element).parents("fieldset").is(":disabled");
			if (disabled) {
				this.enable(false);
			}
			this._valueMethodCalled = false;
			if (this.options.label) {
				this._label();
			}
			if (this.options.loadOnDemand && this.options.loadOnDemand.valueMapper && this.options.value) {
				this.one("dataBound", () => this.requireValueMapper(this.options));
			}
			this._aria();
			kendo.notify(this);
		},
		_bindLoader: function() {
			const that = this;
			that._initLoader = require_dropdowns_loader.initLoader.bind(that);
			that._initLoader();
		},
		_label: function() {
			var that = this;
			var options = that.options;
			var labelOptions = $.isPlainObject(options.label) ? options.label : { content: options.label };
			that.label = new kendo.ui.Label(null, $.extend({}, labelOptions, {
				widget: that,
				floatCheck: that._floatCheck.bind(that)
			}));
			that._inputLabel = that.label.element;
		},
		_floatCheck: function() {
			var hasValue = this.value() && !this._isMultipleSelection() || this.value().length || this.text();
			return !hasValue && !this.popup.visible();
		},
		_refreshFloatingLabel: function() {
			var that = this;
			if (that.label && that.label.floatingLabel) {
				that.label.floatingLabel.refresh();
			}
		},
		_preselect: function(data, value) {
			this._selection._preselect(data, value);
		},
		_setTreeViewOptions: function(options) {
			var treeviewOptions = {
				autoBind: options.autoBind,
				checkboxes: options.checkboxes,
				dataImageUrlField: options.dataImageUrlField,
				dataSpriteCssClassField: options.dataSpriteCssClassField,
				dataTextField: options.dataTextField,
				dataUrlField: options.dataUrlField,
				loadOnDemand: options.loadOnDemand,
				size: options.size
			};
			this.options.treeview = $.extend({}, treeviewOptions, this.options.treeview);
			if (options.template) {
				this.options.treeview.template = options.template;
			}
			if (options.size) {
				this.options.treeview.size = options.size;
			}
		},
		_dataSource: function() {
			const that = this;
			const rootDataSource = that.options.dataSource;
			that._requestStartHandler = that._showBusy;
			that._requestEndHandler = that._hideBusy;
			that._errorHandler = function() {
				that._hideBusy();
			};
			that.dataSource = kendo.data.HierarchicalDataSource.create(rootDataSource).bind("progress", that._requestStartHandler).bind("error", that._errorHandler).bind("requestEnd", that._requestEndHandler);
			if (rootDataSource) {
				$.extend(that.options.treeview, { dataSource: that.dataSource });
			}
		},
		_popupOpen: function() {
			var popup = this.popup;
			popup.wrapper = kendo.wrap(popup.element);
		},
		_getSelection: function() {
			if (this._isMultipleSelection()) {
				this.options._altname = "MultiSelectTree";
				return new ui.DropDownTree.MultipleSelection(this);
			} else {
				return new ui.DropDownTree.SingleSelection(this);
			}
		},
		setDataSource: function(dataSource) {
			this._isDataSourceSet = true;
			if (this._tags) {
				this._noInitialValue = true;
				this.setValue([]);
				this._tags.empty();
				this.span.show();
				this._multipleTags.empty();
			}
			this.dataSource = dataSource;
			this.treeview.setDataSource(dataSource);
			this._isDataSourceSet = false;
		},
		_isMultipleSelection: function() {
			return this.options && (this.options.treeview.checkboxes || this.options.checkboxes);
		},
		_isArrayOfObjects: function(value) {
			return Array.isArray(value) && value.map((x) => typeof x == "object").includes(true);
		},
		options: {
			name: "DropDownTree",
			adaptiveMode: "none",
			animation: {},
			autoBind: true,
			autoClose: true,
			autoWidth: false,
			clearButton: true,
			dataTextField: "",
			dataValueField: "",
			dataImageUrlField: "",
			dataSpriteCssClassField: "",
			dataUrlField: "",
			delay: 500,
			enabled: true,
			enforceMinLength: false,
			filter: "none",
			height: 200,
			ignoreCase: true,
			index: 0,
			loadOnDemand: false,
			messages: {
				"singleTag": "item(s) selected",
				"clear": "clear",
				"deleteTag": "delete",
				"noData": "No data found.",
				"filterInputPlaceholder": "Filter"
			},
			minLength: 1,
			checkboxes: false,
			noDataTemplate: true,
			placeholder: "",
			checkAll: false,
			checkAllTemplate: () => "Check all",
			tagMode: "multiple",
			template: null,
			text: null,
			treeview: {},
			valuePrimitive: false,
			footerTemplate: () => "",
			headerTemplate: () => "",
			value: null,
			valueTemplate: null,
			popup: null,
			filterLabel: null,
			size: undefined,
			fillMode: undefined,
			rounded: undefined,
			label: null,
			adaptiveTitle: null,
			adaptiveSubtitle: null
		},
		events: [
			"open",
			"close",
			"dataBound",
			CHANGE,
			"select",
			"filtering"
		],
		focus: function() {
			this.wrapper.trigger("focus");
		},
		dataItem: function(node) {
			return this.treeview.dataItem(node);
		},
		readonly: function(readonly) {
			this._editable({
				readonly: readonly === undefined ? true : readonly,
				disable: false
			});
			this._toggleCloseVisibility();
			if (this.label && this.label.floatingLabel) {
				this.label.floatingLabel.readonly(readonly === undefined ? true : readonly);
			}
		},
		enable: function(enable) {
			this._editable({
				readonly: false,
				disable: !(enable = enable === undefined ? true : enable)
			});
			this._toggleCloseVisibility();
			if (this.label && this.label.floatingLabel) {
				this.label.floatingLabel.enable(enable = enable === undefined ? true : enable);
			}
		},
		toggle: function(open) {
			this._toggle(open);
		},
		open: function() {
			var popup = this.popup;
			if (!this.options.autoBind && !this.dataSource.data().length) {
				this.treeview._progress(true);
				if (this._isFilterEnabled()) {
					this._search();
				} else {
					this.dataSource.fetch();
				}
			}
			if (popup.visible() || !this._allowOpening()) {
				return;
			}
			popup.one("activate", this._focusInputHandler);
			popup._hovered = true;
			popup.open();
		},
		close: function() {
			this.popup.close();
		},
		search: function(word) {
			var options = this.options;
			var filter;
			clearTimeout(this._typingTimeout);
			if (!options.enforceMinLength && !word.length || word.length >= options.minLength) {
				filter = this._getFilter(word);
				if (this.trigger("filtering", { filter }) || Array.isArray(this.options.dataTextField)) {
					return;
				}
				this._filtering = true;
				this.treeview.dataSource.filter(filter);
			}
		},
		_mapValuesToId: function(values) {
			const that = this;
			if (typeof that.dataSource.options.schema.model === "function") {
				throw new Error("The valueMapper needs dataSource.schema");
			}
			const field = that.dataSource.options.schema.model.id;
			return values.map((item) => item[field]);
		},
		requireValueMapper: function(options, value) {
			const that = this;
			let hasValue = value ? value : options.value;
			hasValue = hasValue && (hasValue instanceof Array ? hasValue : [hasValue]);
			if (hasValue && options.loadOnDemand && typeof options.loadOnDemand.valueMapper !== "function") {
				throw new Error("ValueMapper is not provided while the value is being set. See http://docs.telerik.com/kendo-ui/controls/editors/combobox/virtualization#the-valuemapper-function");
			}
			if (hasValue.length) {
				let index = 0;
				that.options.loadOnDemand.valueMapper(require_valueMapper.valueMapperOptions(that.options, hasValue, that._useValueMapper.bind(that, hasValue, index)));
			}
		},
		_useValueMapper: function(data, index, response) {
			const that = this;
			const deferred = $.Deferred();
			that._deferred = deferred;
			that._handleValueMapperData(index, response);
			deferred.done(() => {
				index++;
				if (index < data.length) {
					that._useValueMapper(data, index, response);
				}
			});
		},
		_handleValueMapperData: function(index, data) {
			const that = this;
			const response = data[index] instanceof Array ? data[index] : data;
			if (!response || !response.length) {
				return;
			}
			let idIndex = 0;
			that._loadItem(response, idIndex);
		},
		_loadItem: function(data, index) {
			const that = this;
			const node = that.dataSource.get(data[index]);
			if (node) {
				node.load().done(() => {
					index++;
					if (index < data.length - 1) {
						that._loadItem(data, index);
					} else {
						that._deferred.resolve();
					}
				});
			}
		},
		_getFilter: function(word) {
			return {
				field: this.options.dataTextField,
				operator: this.options.filter,
				value: word,
				ignoreCase: this.options.ignoreCase
			};
		},
		refresh: function() {
			var data = this.treeview.dataSource.flatView();
			this._renderFooter();
			this._renderNoData();
			if (this.filterInput && this.checkAll) {
				this.checkAll.toggle(!this.filterInput.val().length);
			}
			this.tree.toggle(!!data.length);
			$(this.noData).toggle(!data.length);
		},
		setOptions: function(options) {
			if (this.options.checkboxes != options.checkboxes) {
				delete options.checkboxes;
				window.console.warn("setOptions method can not be used to set the checkboxes option in DropDownTree");
			}
			Widget.fn.setOptions.call(this, options);
			this._setTreeViewOptions(options);
			this._dataSource();
			if (this.options.treeview || options.size) {
				this.treeview.destroy();
				this._treeview();
			}
			if (options.height && this.tree) {
				this.tree.css("max-height", options.height);
			}
			this._header();
			this._noData();
			this._footer();
			this._renderFooter();
			this._renderNoData();
			if (this.span && (this._isMultipleSelection() || this.span.hasClass("k-readonly"))) {
				this._placeholder(true);
			}
			this._inputTemplate();
			this._accessors();
			this._filterHeader();
			this._checkAll();
			this._enable();
			if (options && (options.enable || options.enabled)) {
				this.enable(true);
			}
			this._clearButton();
			if (options === undefined || options === null) {
				options = {};
			}
			if (options.label && this._inputLabel) {
				this.label.setOptions(options.label);
			} else if (options.label === false) {
				this.label._unwrapFloating();
				this._inputLabel.remove();
				delete this._inputLabel;
			} else if (options.label) {
				this._label();
			}
			this._aria();
		},
		destroy: function() {
			kendo.ui.Widget.fn.destroy.call(this);
			if (this.treeview) {
				this.treeview.destroy();
			}
			this.popup.destroy();
			this.wrapper.off(ns);
			this._clear.off(ns);
			if (this.filterInput) {
				this.filterInput.off(ns);
			}
			if (this.tagList) {
				this.tagList.off(ns);
			}
			if (this.bigScreenMQL) {
				this.bigScreenMQL.destroy();
			}
			if (this.smallScreenMQL) {
				this.smallScreenMQL.destroy();
			}
			kendo.unbind(this.tagList);
			if (this.options.checkAll && this.checkAll) {
				this.checkAll.off(ns);
			}
			if (this._form) {
				this._form.off("reset", this._resetHandler);
			}
			if (this.label) {
				this.label.destroy();
			}
		},
		setValue: function(value) {
			value = Array.isArray(value) || value instanceof ObservableArray ? value.slice(0) : [value];
			this._values = value;
		},
		items: function() {
			return this.treeview.items();
		},
		_useValueMapperWithValue: function(value) {
			const that = this;
			let values = value instanceof Array ? value : [value];
			if (typeof values[0] === "object") {
				values = that._mapValuesToId(values);
			}
			that.requireValueMapper(this.options, values);
			that._deferred.done(() => {
				that._selection._setValue(values);
			});
		},
		value: function(value) {
			const that = this;
			const loadOnDemand = that.options.loadOnDemand;
			if (value) {
				if (that.filterInput && that.dataSource._filter) {
					that._filtering = true;
					that.dataSource.filter({});
				} else if (!that.dataSource.data().length || !that.treeview.dataSource.data().length) {
					if (!loadOnDemand) {
						that.treeview.one("loadCompleted", function() {
							that._selection._setValue(value);
						});
						if (!that.options.autoBind && that.options.valuePrimitive) {
							that.dataSource.fetch();
						}
					} else if (loadOnDemand.valueMapper) {
						that.one("dataBound", () => {
							that._useValueMapperWithValue(value);
						});
					} else {
						that.dataSource.fetch(function() {
							that._selection._setValue(value);
						});
					}
					return;
				} else if (loadOnDemand && loadOnDemand.valueMapper) {
					that._useValueMapperWithValue(value);
					return;
				}
			}
			return that._selection._setValue(value);
		},
		text: function(text) {
			var loweredText;
			var ignoreCase = this.options.ignoreCase;
			text = text === null ? "" : text;
			if (text !== undefined && !this._isMultipleSelection()) {
				if (typeof text !== "string") {
					this._textAccessor(text);
					return;
				}
				loweredText = ignoreCase ? text : text.toLowerCase();
				this._selectItemByText(loweredText);
				this._textAccessor(loweredText);
				this._refreshFloatingLabel();
			} else {
				return this._textAccessor();
			}
		},
		_aria: function() {
			var input = this.wrapper.find("span.k-input-inner");
			this.wrapper.attr({
				"aria-haspopup": "tree",
				"aria-expanded": false,
				"aria-controls": this.treeview.element.attr("id"),
				"role": "combobox"
			});
			this._activeId = kendo.guid();
			this._ariaLabel(this.wrapper);
			if (this.filterInput && this.options.filterLabel) {
				this.filterInput.attr("aria-label", this.options.filterLabel);
			}
			if (this.options.checkboxes) {
				this.wrapper.attr({ "aria-describedby": this.tagList[0].id });
				this.tagList.attr({
					"role": "listbox",
					"aria-orientation": "horizontal",
					"aria-multiselectable": true
				});
				this._ariaLabel(this.tagList);
			}
		},
		_header: function() {
			var list = this;
			var header = $(list.header);
			var template = list.options.headerTemplate;
			kendo.destroy(header);
			header.remove();
			if (!template) {
				list.header = null;
				return;
			}
			var headerTemplate = typeof template !== "function" ? kendo.template(template) : template;
			header = $(headerTemplate({}));
			list.header = header[0] ? header : null;
			list.list.prepend(header);
		},
		_noData: function() {
			var list = this;
			var noData = $(list.noData);
			var template = list.options.noDataTemplate === true ? encode(list.options.messages.noData) : list.options.noDataTemplate;
			kendo.destroy(noData);
			noData.remove();
			if (!template) {
				list.noData = null;
				return;
			}
			list.noData = $("<div class=\"k-no-data\"></div>").hide().appendTo(list.list);
			list.noDataTemplate = typeof template !== "function" ? kendo.template(() => template) : template;
		},
		_renderNoData: function() {
			var list = this;
			var noData = list.noData;
			if (!noData) {
				return;
			}
			noData.html(list.noDataTemplate({ instance: list }));
		},
		_footer: function() {
			var list = this;
			var footer = $(list.footer);
			var template = list.options.footerTemplate;
			kendo.destroy(footer);
			footer.remove();
			if (!template) {
				list.footer = null;
				return;
			}
			list.footer = $("<div class=\"k-footer\"></div>").appendTo(list.list);
			list.footerTemplate = typeof template !== "function" ? kendo.template(template) : template;
		},
		_renderFooter: function() {
			var list = this;
			var footer = list.footer;
			if (!footer) {
				return;
			}
			footer.html(list.footerTemplate({ instance: list }));
		},
		_enable: function() {
			var that = this, options = that.options, disabled = that.element.is("[disabled]");
			if (options.enable !== undefined) {
				options.enabled = options.enable;
			}
			if (!options.enabled || disabled) {
				that.enable(false);
			} else {
				that.readonly(that.element.is("[readonly]"));
			}
		},
		_adjustListWidth: function() {
			var that = this, list = that.list, width = list[0].style.width, wrapper = that.wrapper, computedStyle, computedWidth;
			if (!list.data(WIDTH) && width) {
				return;
			}
			computedStyle = window.getComputedStyle ? window.getComputedStyle(wrapper[0], null) : 0;
			computedWidth = parseFloat(computedStyle && computedStyle.width) || outerWidth(wrapper);
			if (computedStyle && browser.msie) {
				computedWidth += parseFloat(computedStyle.paddingLeft) + parseFloat(computedStyle.paddingRight) + parseFloat(computedStyle.borderLeftWidth) + parseFloat(computedStyle.borderRightWidth);
			}
			if (list.css("box-sizing") !== "border-box") {
				width = computedWidth - (outerWidth(list) - list.width());
			} else {
				width = computedWidth;
			}
			list.css({
				fontFamily: wrapper.css("font-family"),
				width: that.options.autoWidth ? "auto" : width,
				minWidth: width,
				whiteSpace: that.options.autoWidth ? "nowrap" : "normal"
			}).data(WIDTH, width);
			return true;
		},
		_reset: function() {
			var that = this, element = that.element, formId = element.attr("form"), form = formId ? $("#" + formId) : element.closest("form");
			if (form[0]) {
				that._resetHandler = function() {
					setTimeout(function() {
						that.value(that._initial);
					});
				};
				that._form = form.on("reset", that._resetHandler);
			}
		},
		_hasActionSheet: function() {
			return this.options.adaptiveMode === "auto" && !this.bigScreenMQL.mediaQueryList.matches;
		},
		_popup: function() {
			var that = this;
			var list = this;
			if (that.options.checkboxes) {
				if (that.options.checkAll) {
					that.list.attr("role", "application");
				}
				that.list.addClass("k-multiselecttree-popup");
			} else {
				that.list.addClass("k-dropdowntree-popup");
			}
			if (list.options.adaptiveMode == "auto" && !list.bigScreenMQL.mediaQueryList.matches) {
				$(document.body).append(list.list);
				list.popup = new ui.ActionSheet(list.list, {
					adaptive: true,
					hideOverflowContent: true,
					headerTemplate: (options) => `<div class="k-text-center k-actionsheet-titlebar" >` + "<div class=\"k-actionsheet-titlebar-group k-hbox\">" + `<div  class="k-actionsheet-title">` + `<div class="k-text-center">${list.options.adaptiveTitle || (list.label ? list.label.element.text() : list.options.label || list.options.placeholder || "Select")}</div>` + (list.options.adaptiveSubtitle ? `<div class="k-actionsheet-subtitle k-text-center">${list.options.adaptiveSubtitle || ""}</div>` : "") + "</div>" + (options.closeButton ? "<div class=\"k-actionsheet-actions\">" + kendo.html.renderButton(`<button tabindex="-1" ${kendo.attr("ref-actionsheet-close-button")}></button>`, {
						icon: "check",
						fillMode: "flat"
					}) + "</div>" : "") + "</div>" + (this._isFilterEnabled() ? `<div class="k-actionsheet-titlebar-group k-actionsheet-filter"></div>` : "") + "</div>",
					closeButton: true,
					focusOnActivate: false,
					fullscreen: list.smallScreenMQL.mediaQueryList.matches,
					popup: extend({}, list.options.popup, {
						anchor: list.wrapper,
						open: list._openHandler.bind(list),
						close: list._closeHandler.bind(list),
						animation: list.options.animation,
						isRtl: support.isRtl(list.wrapper),
						autosize: list.options.autoWidth
					}),
					deactivate: () => {
						this._refreshFloatingLabel();
					},
					activate: () => {
						this._refreshFloatingLabel();
					}
				});
			} else {
				list.popup = new ui.Popup(list.list, extend({}, list.options.popup, {
					anchor: list.wrapper,
					open: list._openHandler.bind(list),
					close: list._closeHandler.bind(list),
					animation: list.options.animation,
					isRtl: support.isRtl(list.wrapper),
					autosize: list.options.autoWidth,
					deactivate: () => {
						this._refreshFloatingLabel();
					},
					activate: () => {
						this._refreshFloatingLabel();
					}
				}));
				list.popup.one("open", list._popupOpen.bind(list));
			}
		},
		_allowOpening: function() {
			return this.options.noDataTemplate || this.treeview.dataSource.flatView().length;
		},
		_placeholder: function(show) {
			if (this.span) {
				this.span.toggleClass("k-readonly", show).text(show ? this.options.placeholder : "");
			}
		},
		_currentValue: function(dataItem) {
			var currentValue = this._value(dataItem);
			if (!currentValue && currentValue !== 0) {
				currentValue = dataItem;
			}
			return currentValue;
		},
		_checkValue: function(dataItem) {
			var value = "";
			var indexOfValue = -1;
			var currentValue = this.value();
			var isMultiple = this.options.tagMode === "multiple";
			if (dataItem || dataItem === 0) {
				if (dataItem.level) {
					dataItem._level = dataItem.level();
				}
				value = this._currentValue(dataItem);
				indexOfValue = currentValue.indexOf(value);
			}
			if (dataItem.checked) {
				var alreadyAddedTag = $.grep(this._tags, function(item) {
					return item.uid === dataItem._tagUid;
				});
				if (alreadyAddedTag.length) {
					return;
				}
				var itemToAdd = new ObservableObject(dataItem.toJSON());
				dataItem._tagUid = itemToAdd.uid;
				this._tags.push(itemToAdd);
				if (this._tags.length === 1) {
					this.span.hide();
					if (!isMultiple) {
						this._multipleTags.push(itemToAdd);
					}
				}
				if (indexOfValue === -1) {
					currentValue.push(value);
					this.setValue(currentValue);
				}
			} else {
				var itemToRemove = this._tags.find(function(item) {
					return item.uid === dataItem._tagUid;
				});
				var idx = this._tags.indexOf(itemToRemove);
				if (idx !== -1) {
					this._tags.splice(idx, 1);
				} else {
					this._treeViewCheckAllCheck(dataItem);
					return;
				}
				if (this._tags.length === 0) {
					this.span.show();
					if (!isMultiple) {
						this._multipleTags.splice(0, 1);
					}
				}
				if (indexOfValue !== -1) {
					currentValue.splice(indexOfValue, 1);
					this.setValue(currentValue);
				}
			}
			this._treeViewCheckAllCheck(dataItem);
			if (!this._preventChangeTrigger && !this._valueMethodCalled && !this.dataSource._requestInProgress) {
				this.trigger(CHANGE);
			}
			if (this.options.autoClose && this.popup.visible()) {
				this.close();
				this.wrapper.trigger("focus");
			}
			this.popup.position();
			this._toggleCloseVisibility();
			this._updateSelectedOptions();
		},
		_updateSelectedOptions: function() {
			if (this.element[0].tagName.toLowerCase() !== "select") {
				return;
			}
			var selectedItems = this._tags;
			var options = "";
			var dataItem = null;
			var value = null;
			if (selectedItems.length) {
				for (var idx = 0; idx < selectedItems.length; idx++) {
					dataItem = selectedItems[idx];
					value = this._value(dataItem);
					options += this._option(value, this._text(dataItem), true);
				}
			}
			this.element.html(options);
		},
		_option: function(dataValue, dataText, selected) {
			var option = "<option";
			if (dataValue !== undefined) {
				dataValue += "";
				if (dataValue.indexOf("\"") !== -1) {
					dataValue = dataValue.replace(quotRegExp, "&quot;");
				}
				option += " value=\"" + dataValue + "\"";
			}
			if (selected) {
				option += " selected";
			}
			option += ">";
			if (dataText !== undefined) {
				option += kendo.htmlEncode(dataText);
			}
			return option += "</option>";
		},
		_selectValue: function(dataItem) {
			var value = "";
			var text = "";
			if (dataItem || dataItem === 0) {
				if (dataItem.level) {
					dataItem._level = dataItem.level();
				}
				text = this._text(dataItem) || dataItem;
				value = this._currentValue(dataItem);
			}
			if (value === null) {
				value = "";
			}
			this.setValue(value);
			this._textAccessor(text, dataItem);
			this._accessor(value);
			if (!this._preventChangeTrigger && !this._valueMethodCalled) {
				this.trigger(CHANGE);
			}
			this._valueMethodCalled = false;
			if (this.options.autoClose && this.popup.visible()) {
				this.close();
				this.wrapper.trigger("focus");
			}
			this.popup.position();
			this._toggleCloseVisibility();
		},
		_clearClick: function(e) {
			e.stopPropagation();
			this.wrapper.trigger("focus");
			this._clearTextAndValue();
		},
		_clearTextAndValue: function() {
			var shouldTrigger = this._selection._clearValue();
			this.setValue([]);
			this._clearInput();
			this._clearText();
			this.popup.position();
			this._toggleCloseVisibility();
			this._refreshFloatingLabel();
			if (shouldTrigger) {
				this.trigger(CHANGE);
			}
		},
		_clearText: function() {
			if (this.options.placeholder) {
				this._placeholder(true);
			} else {
				if (this.span) {
					this.span.html("");
				}
			}
		},
		_inputTemplate: function() {
			var template = this.options.valueTemplate;
			if (!template) {
				template = (data) => encode(this._text(data));
			} else {
				template = kendo.template(template);
			}
			this.valueTemplate = template;
		},
		_assignInstance: function(text, value) {
			var dataTextField = this.options.dataTextField;
			var dataItem = {};
			if (dataTextField) {
				assign(dataItem, dataTextField.split(DOT), text);
				assign(dataItem, this.options.dataValueField.split(DOT), value);
				dataItem = new ObservableObject(dataItem);
			} else {
				dataItem = text;
			}
			return dataItem;
		},
		_textAccessor: function(text, dataItem) {
			var valueTemplate = this.valueTemplate;
			var span = this.span;
			if (text === undefined) {
				return span.text();
			}
			span.removeClass("k-readonly");
			if (!dataItem && ($.isPlainObject(text) || text instanceof ObservableObject)) {
				dataItem = text;
			}
			if (!dataItem) {
				dataItem = this._assignInstance(text, this._accessor());
			}
			var getElements = function() {
				return {
					elements: span.get(),
					data: [{ dataItem }]
				};
			};
			try {
				span.html(valueTemplate(dataItem));
			} catch (e) {
				if (span) {
					span.html("");
				}
			}
		},
		_accessors: function() {
			var element = this.element;
			var options = this.options;
			var textField = element.attr(kendo.attr("text-field"));
			var valueField = element.attr(kendo.attr("value-field"));
			if (!options.dataTextField && textField) {
				options.dataTextField = textField;
			}
			if (!options.dataValueField && valueField) {
				options.dataValueField = valueField;
			}
			options.dataTextField = options.dataTextField || "text";
			options.dataValueField = options.dataValueField || "value";
			this._text = getterFunction(options.dataTextField);
			this._value = getterFunction(options.dataValueField);
		},
		_accessor: function(value, idx) {
			return this._accessorInput(value, idx);
		},
		_accessorInput: function(value) {
			var element = this.element[0];
			if (value === undefined) {
				return element.value;
			} else {
				if (value === null) {
					value = "";
				}
				element.value = value;
			}
		},
		_clearInput: function() {
			var element = this.element[0];
			element.value = "";
		},
		_clearButton: function() {
			var clearTitle = encode(this.options.messages.clear);
			if (!this._clear) {
				this._clear = $("<span unselectable=\"on\" class=\"k-clear-value\" title=\"" + clearTitle + "\">" + kendo.ui.icon("x") + "</span>").attr({ "tabIndex": -1 });
			}
			if (this.options.clearButton) {
				this._clear.insertAfter(this.span.parent());
			} else {
				if (!this.options.clearButton) {
					this._clear.remove();
				}
			}
		},
		_toggleCloseVisibility: function() {
			var isReadOnly = this.element.attr(READONLY);
			var hasValue = this.value() && !this._isMultipleSelection() || this.value().length;
			var valueDoesNotEqualPlaceHolder = this.element.val() && this.element.val() !== this.options.placeholder;
			if (!isReadOnly && (hasValue || valueDoesNotEqualPlaceHolder)) {
				this._showClear();
			} else {
				this._hideClear();
			}
		},
		_showClear: function() {
			if (this._clear) {
				this._clear.removeClass(HIDDENCLASS);
			}
		},
		_hideClear: function() {
			if (this._clear) {
				this._clear.addClass(HIDDENCLASS);
			}
		},
		_openHandler: function(e) {
			this._adjustListWidth();
			if (this.trigger(OPEN)) {
				e.preventDefault();
			} else {
				this.wrapper.attr("aria-expanded", true);
				this.tree.attr("aria-hidden", false);
			}
		},
		_closeHandler: function(e) {
			if (this.trigger(CLOSE)) {
				e.preventDefault();
			} else {
				this.wrapper.attr("aria-expanded", false);
				this.tree.attr("aria-hidden", true);
			}
		},
		_treeview: function() {
			var that = this;
			if (that.options.adaptiveMode != "auto" && that.options.height) {
				that.tree.css("max-height", that.options.height);
			}
			that.tree.attr("id", kendo.guid());
			that.treeview = new TreeView(that.tree, extend({ size: that.options.size }, that.options.treeview), that);
			that.dataSource = that.treeview.dataSource;
			that.treeview.bind("select", function(e) {
				that.trigger("select", e);
			});
			that.treeview.bind("expand", function() {
				if (that.options.autoWidth && that.popup && that.popup.visible()) {
					setTimeout(function() {
						that.popup.position();
					}, (that.treeview.options?.animation?.expand || {}).duration || 0);
				}
			});
			that.treeview.bind("collapse", function() {
				if (that.options.autoWidth && that.popup && that.popup.visible()) {
					setTimeout(function() {
						that.popup.position();
					}, (that.treeview.options?.animation?.collapse || {}).duration || 0);
				}
			});
		},
		_treeViewDataBound: function(e) {
			if (e.node && this._prev && this._prev.length) {
				e.sender.expand(e.node);
			}
			if (this._filtering) {
				if (!e.node) {
					this._filtering = false;
				}
				if (!this._isMultipleSelection()) {
					this._deselectItem(e);
				}
				return;
			}
			if (!this.treeview) {
				this.treeview = e.sender;
			}
			if (!e.node) {
				var rootItems = e.sender.dataSource.data();
				this._checkLoadedItems(rootItems);
			} else {
				var rootItem = e.sender.dataItem(e.node);
				if (rootItem) {
					var subItems = rootItem.children.data();
					this._checkLoadedItems(subItems);
				}
			}
			this.trigger("dataBound", e);
		},
		_deselectItem: function(e) {
			var items = [];
			if (!e.node) {
				items = e.sender.dataSource.data();
			} else {
				var rootItem = e.sender.dataItem(e.node);
				if (rootItem) {
					items = rootItem.children.data();
				}
			}
			for (var i = 0; i < items.length; i++) {
				if (items[i].selected && !this._valueComparer(items[i], this.value())) {
					items[i].set("selected", false);
				}
			}
		},
		_checkLoadedItems: function(items) {
			var value = this.value();
			if (!items) {
				return;
			}
			for (var idx = 0; idx < items.length; idx++) {
				this._selection._checkLoadedItem(items[idx], value);
			}
		},
		_treeViewCheckAllCheck: function(dataItem) {
			if (this.options.checkAll && this.checkAll) {
				this._getAllChecked();
				if (dataItem.checked) {
					this._checkCheckAll();
				} else {
					this._uncheckCheckAll();
				}
			}
		},
		_checkCheckAll: function() {
			var checkAllCheckbox = this.checkAll.find(".k-checkbox");
			if (this._allItemsAreChecked) {
				checkAllCheckbox.prop("checked", true).prop("indeterminate", false);
			} else {
				checkAllCheckbox.prop("indeterminate", true);
			}
		},
		_uncheckCheckAll: function() {
			var checkAllCheckbox = this.checkAll.find(".k-checkbox");
			if (this._allItemsAreUnchecked) {
				checkAllCheckbox.prop("checked", false).prop("indeterminate", false);
			} else {
				checkAllCheckbox.prop("indeterminate", true);
			}
		},
		_filterHeader: function() {
			var filterTemplate = "<div class=\"k-list-filter\">" + "<span class=\"k-textbox k-input\" type=\"text\" autocomplete=\"off\">" + kendo.ui.icon({
				icon: "search",
				iconClass: "k-input-icon"
			}) + "</span>" + "</div>";
			if (this.filterInput) {
				this.filterInput.off(ns).parent().remove();
				this.filterInput = null;
			}
			if (this._isFilterEnabled()) {
				this._disableCheckChildren();
				this.filterInput = $("<input class=\"k-input-inner\" type=\"text\" />").attr({
					placeholder: this.element.attr("placeholder") || this.options.messages.filterInputPlaceholder,
					title: this.element.attr("title"),
					role: "searchbox",
					"aria-haspopup": "tree",
					"aria-autocomplete": "list"
				});
				this.filterInput.on("input", this._filterChange.bind(this));
				if (this._hasActionSheet()) {
					$(filterTemplate).appendTo(this.popup.wrapper.find(".k-actionsheet-filter")).find(".k-textbox").append(this.filterInput);
				} else {
					$(filterTemplate).insertBefore(this.tree).find(".k-textbox").append(this.filterInput);
				}
			}
		},
		_filterChange: function() {
			if (this.filterInput) {
				this._search();
			}
		},
		_disableCheckChildren: function() {
			if (this._isMultipleSelection() && this.options.treeview.checkboxes && this.options.treeview.checkboxes.checkChildren) {
				this.options.treeview.checkboxes.checkChildren = false;
			}
		},
		_checkAll: function() {
			if (this.checkAll) {
				this.checkAll.find(".k-checkbox-label, .k-checkbox").off(ns);
				this.checkAll.remove();
				this.checkAll = null;
			}
			if (this._isMultipleSelection() && this.options.checkAll) {
				var checkAllCheckbox = html.renderCheckBox(extend({}, this.options, { label: "Check All" }));
				this.checkAll = $("<div class=\"k-check-all\">" + checkAllCheckbox + "</div>").insertBefore(this.tree);
				this.checkAll.find(".k-checkbox-label").html(kendo.template(this.options.checkAllTemplate)({ instance: this }));
				this.checkAll.find(".k-checkbox").on("change" + ns, this._changeCheckAll.bind(this)).on("keydown" + ns, this._keydownCheckAll.bind(this));
				this._disabledCheckedItems = [];
				this._disabledUnCheckedItems = [];
				this._getAllChecked();
				if (!this._allItemsAreUnchecked) {
					this._checkCheckAll();
				}
			}
		},
		_changeCheckAll: function() {
			var checkAllCheckbox = this.checkAll.find(".k-checkbox");
			var isChecked = checkAllCheckbox.prop("checked");
			this._updateCheckAll(isChecked);
		},
		_updateCheckAll: function(isChecked) {
			var checkAllCheckbox = this.checkAll.find(".k-checkbox");
			this._toggleCheckAllItems(isChecked);
			checkAllCheckbox.prop("checked", isChecked);
			if (this._disabledCheckedItems.length && this._disabledUnCheckedItems.length) {
				checkAllCheckbox.prop("indeterminate", true);
			} else if (this._disabledCheckedItems.length) {
				checkAllCheckbox.prop("indeterminate", !isChecked);
			} else if (this._disabledUnCheckedItems.length) {
				checkAllCheckbox.prop("indeterminate", isChecked);
			} else {
				checkAllCheckbox.prop("indeterminate", false);
			}
			this._disabledCheckedItems = [];
			this._disabledUnCheckedItems = [];
		},
		_keydownCheckAll: function(e) {
			var key = e.keyCode;
			var altKey = e.altKey;
			if (altKey && key === keys.UP || key === keys.ESC || key === keys.TAB) {
				this.close();
				this.wrapper.trigger("focus");
				e.preventDefault();
				return;
			}
			if (key === keys.UP) {
				if (this.filterInput) {
					this.filterInput.trigger("focus");
				} else {
					this.wrapper.trigger("focus");
				}
				e.preventDefault();
			}
			if (key === keys.DOWN) {
				if (this.tree && this.tree.is(":visible")) {
					this.tree.trigger("focus");
				}
				e.preventDefault();
			}
			if (key === keys.SPACEBAR && (browser.msie || browser.edge)) {
				this._clickCheckAll();
				e.preventDefault();
			}
		},
		_clickCheckAll: function() {
			var checkAllCheckbox = this.checkAll.find(".k-checkbox");
			var isChecked = checkAllCheckbox.prop("checked");
			this._updateCheckAll(!isChecked);
			checkAllCheckbox.trigger("focus");
		},
		_dfs: function(items, action, prop) {
			for (var idx = 0; idx < items.length; idx++) {
				if (!this[action](items[idx], prop)) {
					break;
				}
				this._traverceChildren(items[idx], action, prop);
			}
		},
		_uncheckItemByUid: function(uid) {
			this._dfs(this.dataSource.data(), "_uncheckItemEqualsUid", uid);
		},
		_uncheckItemEqualsUid: function(item, uid) {
			if (item.enabled !== false && item._tagUid == uid) {
				item.set("checked", false);
				return false;
			}
			return true;
		},
		_selectItemByText: function(text) {
			this._dfs(this.dataSource.data(), "_itemEqualsText", text);
		},
		_itemEqualsText: function(item, text) {
			if (item.enabled !== false && this._text(item) === text) {
				this.treeview.select(this.treeview.findByUid(item.uid));
				this._selectValue(item);
				return false;
			}
			return true;
		},
		_selectItemByValue: function(value) {
			this._dfs(this.dataSource.data(), "_itemEqualsValue", value);
		},
		_itemEqualsValue: function(item, value) {
			if (item.enabled !== false && this._valueComparer(item, value)) {
				this.treeview.select(this.treeview.findByUid(item.uid));
				return false;
			}
			return true;
		},
		_checkItemByValue: function(value) {
			var items = this.treeview.dataItems();
			for (var idx = 0; idx < value.length; idx++) {
				this._dfs(items, "_checkItemEqualsValue", value[idx]);
			}
		},
		_checkItemEqualsValue: function(item, value) {
			if (item.enabled !== false && this._valueComparer(item, value)) {
				item.set("checked", true);
				return false;
			}
			return true;
		},
		_valueComparer: function(item, value) {
			var itemValue = this._value(item);
			var itemText;
			if (!this._isNullorUndefined(itemValue)) {
				if (this._isNullorUndefined(value)) {
					return false;
				}
				var newValue = this._value(value);
				if (newValue) {
					return itemValue == newValue;
				} else {
					return itemValue == value;
				}
			}
			itemText = this._text(item);
			if (itemText) {
				if (this._text(value)) {
					return itemText == this._text(value);
				} else {
					return itemText == value;
				}
			}
			return false;
		},
		_isNullorUndefined: function(value) {
			return value === undefined || value === null;
		},
		_getAllChecked: function() {
			this._allCheckedItems = [];
			this._allItemsAreChecked = true;
			this._allItemsAreUnchecked = true;
			this._dfs(this.dataSource.data(), "_getAllCheckedItems");
			return this._allCheckedItems;
		},
		_getAllCheckedItems: function(item) {
			if (this._allItemsAreChecked) {
				this._allItemsAreChecked = item.checked;
			}
			if (this._allItemsAreUnchecked) {
				this._allItemsAreUnchecked = !item.checked;
			}
			if (item.checked) {
				this._allCheckedItems.push(item);
			}
			return true;
		},
		_traverceChildren: function(item, action, prop) {
			var childrenField = it