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devextreme-angular

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DevExtreme UI and Visualization Components for Angular

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{"version":3,"file":"devextreme-angular-ui-tree-view.mjs","sources":["../../../dist/ui/tree-view/index.ts","../../../dist/ui/tree-view/devextreme-angular-ui-tree-view.ts"],"sourcesContent":["/*!\n * devextreme-angular\n * Version: 26.1.3\n * Build date: Wed Jun 10 2026\n *\n * Copyright (c) 2012 - 2026 Developer Express Inc. ALL RIGHTS RESERVED\n *\n * This software may be modified and distributed under the terms\n * of the MIT license. See the LICENSE file in the root of the project for details.\n *\n * https://github.com/DevExpress/DevExtreme\n */\n\n/* tslint:disable:max-line-length */\n\n\nimport {\n TransferState,\n Component,\n NgModule,\n ElementRef,\n NgZone,\n PLATFORM_ID,\n Inject,\n\n Input,\n Output,\n OnDestroy,\n EventEmitter,\n OnChanges,\n DoCheck,\n SimpleChanges,\n ContentChildren,\n QueryList\n} from '@angular/core';\n\nexport type { ExplicitTypes } from 'devextreme/ui/tree_view';\n\nimport type { dxTreeViewNode, dxTreeViewItem, DisabledNodeSelectionMode, TreeViewExpandEvent, ContentReadyEvent, DisposingEvent, InitializedEvent, ItemClickEvent, ItemCollapsedEvent, ItemContextMenuEvent, ItemExpandedEvent, ItemHoldEvent, ItemRenderedEvent, ItemSelectionChangedEvent, OptionChangedEvent, SelectAllValueChangedEvent, SelectionChangedEvent, TreeViewCheckBoxMode } from 'devextreme/ui/tree_view';\nimport type { default as DataSource, DataSourceOptions } from 'devextreme/data/data_source';\nimport type { Store } from 'devextreme/data/store';\nimport type { DataStructure, ScrollDirection, SearchMode, SingleOrMultiple } from 'devextreme/common';\nimport type { dxTextBoxOptions } from 'devextreme/ui/text_box';\n\nimport DxTreeView from 'devextreme/ui/tree_view';\n\n\nimport {\n DxComponent,\n DxTemplateHost,\n DxIntegrationModule,\n DxTemplateModule,\n NestedOptionHost,\n IterableDifferHelper,\n WatcherHelper,\n CollectionNestedOption,\n} from 'devextreme-angular/core';\n\nimport { DxiItemModule } from 'devextreme-angular/ui/nested';\nimport { DxoSearchEditorOptionsModule } from 'devextreme-angular/ui/nested';\nimport { DxiButtonModule } from 'devextreme-angular/ui/nested';\nimport { DxoOptionsModule } from 'devextreme-angular/ui/nested';\n\nimport { DxiTreeViewButtonModule } from 'devextreme-angular/ui/tree-view/nested';\nimport { DxiTreeViewItemModule } from 'devextreme-angular/ui/tree-view/nested';\nimport { DxoTreeViewOptionsModule } from 'devextreme-angular/ui/tree-view/nested';\nimport { DxoTreeViewSearchEditorOptionsModule } from 'devextreme-angular/ui/tree-view/nested';\nimport { \n PROPERTY_TOKEN_buttons,\n PROPERTY_TOKEN_items,\n } from 'devextreme-angular/core/tokens';\n\n\n/**\n * The TreeView UI component is a tree-like representation of textual data.\n\n */\n@Component({\n selector: 'dx-tree-view',\n template: '',\n host: { ngSkipHydration: 'true' },\n imports: [ DxIntegrationModule ],\n providers: [\n DxTemplateHost,\n WatcherHelper,\n NestedOptionHost,\n IterableDifferHelper\n ]\n})\nexport class DxTreeViewComponent<TItem = any, TKey = any> extends DxComponent implements OnDestroy, OnChanges, DoCheck {\n\n @ContentChildren(PROPERTY_TOKEN_buttons)\n set _buttonsContentChildren(value: QueryList<CollectionNestedOption>) {\n this.setChildren('buttons', value);\n }\n\n @ContentChildren(PROPERTY_TOKEN_items)\n set _itemsContentChildren(value: QueryList<CollectionNestedOption>) {\n this.setChildren('items', value);\n }\n\n instance: DxTreeView<TItem, TKey> = null;\n\n /**\n * Specifies the shortcut key that sets focus on the UI component.\n \n */\n @Input()\n get accessKey(): string | undefined {\n return this._getOption('accessKey');\n }\n set accessKey(value: string | undefined) {\n this._setOption('accessKey', value);\n }\n\n\n /**\n * Specifies whether the UI component changes its visual state as a result of user interaction.\n \n */\n @Input()\n get activeStateEnabled(): boolean {\n return this._getOption('activeStateEnabled');\n }\n set activeStateEnabled(value: boolean) {\n this._setOption('activeStateEnabled', value);\n }\n\n\n /**\n * Specifies whether or not to animate item collapsing and expanding.\n \n */\n @Input()\n get animationEnabled(): boolean {\n return this._getOption('animationEnabled');\n }\n set animationEnabled(value: boolean) {\n this._setOption('animationEnabled', value);\n }\n\n\n /**\n * Specifies a custom collapse icon.\n \n */\n @Input()\n get collapseIcon(): null | string {\n return this._getOption('collapseIcon');\n }\n set collapseIcon(value: null | string) {\n this._setOption('collapseIcon', value);\n }\n\n\n /**\n * Allows you to load nodes on demand.\n \n */\n @Input()\n get createChildren(): ((parentNode: dxTreeViewNode) => any | Array<Record<string, any>>) {\n return this._getOption('createChildren');\n }\n set createChildren(value: ((parentNode: dxTreeViewNode) => any | Array<Record<string, any>>)) {\n this._setOption('createChildren', value);\n }\n\n\n /**\n * Binds the UI component to data.\n \n */\n @Input()\n get dataSource(): Array<dxTreeViewItem> | DataSource | DataSourceOptions | null | Store | string {\n return this._getOption('dataSource');\n }\n set dataSource(value: Array<dxTreeViewItem> | DataSource | DataSourceOptions | null | Store | string) {\n this._setOption('dataSource', value);\n }\n\n\n /**\n * Notifies the UI component of the data structure in use.\n \n */\n @Input()\n get dataStructure(): DataStructure {\n return this._getOption('dataStructure');\n }\n set dataStructure(value: DataStructure) {\n this._setOption('dataStructure', value);\n }\n\n\n /**\n * Specifies whether the UI component responds to user interaction.\n \n */\n @Input()\n get disabled(): boolean {\n return this._getOption('disabled');\n }\n set disabled(value: boolean) {\n this._setOption('disabled', value);\n }\n\n\n /**\n * Specifies the name of the data source item field whose value defines whether or not the corresponding UI component item is disabled.\n \n */\n @Input()\n get disabledExpr(): ((item: any) => boolean | undefined) | string {\n return this._getOption('disabledExpr');\n }\n set disabledExpr(value: ((item: any) => boolean | undefined) | string) {\n this._setOption('disabledExpr', value);\n }\n\n\n /**\n * Configures disabled node behavior during batch selection operations.\n \n */\n @Input()\n get disabledNodeSelectionMode(): DisabledNodeSelectionMode {\n return this._getOption('disabledNodeSelectionMode');\n }\n set disabledNodeSelectionMode(value: DisabledNodeSelectionMode) {\n this._setOption('disabledNodeSelectionMode', value);\n }\n\n\n /**\n * Specifies the data field whose values should be displayed.\n \n */\n @Input()\n get displayExpr(): ((item: any) => string) | string {\n return this._getOption('displayExpr');\n }\n set displayExpr(value: ((item: any) => string) | string) {\n this._setOption('displayExpr', value);\n }\n\n\n /**\n * Specifies the global attributes to be attached to the UI component&apos;s container element.\n \n */\n @Input()\n get elementAttr(): Record<string, any> {\n return this._getOption('elementAttr');\n }\n set elementAttr(value: Record<string, any>) {\n this._setOption('elementAttr', value);\n }\n\n\n /**\n * Specifies whether or not a user can expand all tree view items by the &apos;*&apos; hot key.\n \n */\n @Input()\n get expandAllEnabled(): boolean {\n return this._getOption('expandAllEnabled');\n }\n set expandAllEnabled(value: boolean) {\n this._setOption('expandAllEnabled', value);\n }\n\n\n /**\n * Specifies which data source field specifies whether an item is expanded.\n \n */\n @Input()\n get expandedExpr(): ((item: any, value: boolean | undefined) => boolean | undefined) | string {\n return this._getOption('expandedExpr');\n }\n set expandedExpr(value: ((item: any, value: boolean | undefined) => boolean | undefined) | string) {\n this._setOption('expandedExpr', value);\n }\n\n\n /**\n * Specifies the event on which to expand/collapse a node.\n \n */\n @Input()\n get expandEvent(): TreeViewExpandEvent {\n return this._getOption('expandEvent');\n }\n set expandEvent(value: TreeViewExpandEvent) {\n this._setOption('expandEvent', value);\n }\n\n\n /**\n * Specifies a custom expand icon.\n \n */\n @Input()\n get expandIcon(): null | string {\n return this._getOption('expandIcon');\n }\n set expandIcon(value: null | string) {\n this._setOption('expandIcon', value);\n }\n\n\n /**\n * Specifies whether or not all parent nodes of an initially expanded node are displayed expanded.\n \n */\n @Input()\n get expandNodesRecursive(): boolean {\n return this._getOption('expandNodesRecursive');\n }\n set expandNodesRecursive(value: boolean) {\n this._setOption('expandNodesRecursive', value);\n }\n\n\n /**\n * Specifies whether the UI component can be focused using keyboard navigation.\n \n */\n @Input()\n get focusStateEnabled(): boolean {\n return this._getOption('focusStateEnabled');\n }\n set focusStateEnabled(value: boolean) {\n this._setOption('focusStateEnabled', value);\n }\n\n\n /**\n * Specifies the name of the data source item field whose value defines whether or not the corresponding node includes child nodes.\n \n */\n @Input()\n get hasItemsExpr(): ((item: any) => boolean | undefined) | string {\n return this._getOption('hasItemsExpr');\n }\n set hasItemsExpr(value: ((item: any) => boolean | undefined) | string) {\n this._setOption('hasItemsExpr', value);\n }\n\n\n /**\n * Specifies the UI component&apos;s height.\n \n */\n @Input()\n get height(): number | string | undefined {\n return this._getOption('height');\n }\n set height(value: number | string | undefined) {\n this._setOption('height', value);\n }\n\n\n /**\n * Specifies text for a hint that appears when a user pauses on the UI component.\n \n */\n @Input()\n get hint(): string | undefined {\n return this._getOption('hint');\n }\n set hint(value: string | undefined) {\n this._setOption('hint', value);\n }\n\n\n /**\n * Specifies whether the UI component changes its state when a user pauses on it.\n \n */\n @Input()\n get hoverStateEnabled(): boolean {\n return this._getOption('hoverStateEnabled');\n }\n set hoverStateEnabled(value: boolean) {\n this._setOption('hoverStateEnabled', value);\n }\n\n\n /**\n * The time period in milliseconds before the onItemHold event is raised.\n \n */\n @Input()\n get itemHoldTimeout(): number {\n return this._getOption('itemHoldTimeout');\n }\n set itemHoldTimeout(value: number) {\n this._setOption('itemHoldTimeout', value);\n }\n\n\n /**\n * An array of items displayed by the UI component.\n \n */\n @Input()\n get items(): Array<any | dxTreeViewItem> {\n return this._getOption('items');\n }\n set items(value: Array<any | dxTreeViewItem>) {\n this._setOption('items', value);\n }\n\n\n /**\n * Specifies which data field contains nested items.\n \n */\n @Input()\n get itemsExpr(): ((item: any) => Array<any> | undefined) | string {\n return this._getOption('itemsExpr');\n }\n set itemsExpr(value: ((item: any) => Array<any> | undefined) | string) {\n this._setOption('itemsExpr', value);\n }\n\n\n /**\n * Specifies a custom template for items.\n \n */\n @Input()\n get itemTemplate(): any {\n return this._getOption('itemTemplate');\n }\n set itemTemplate(value: any) {\n this._setOption('itemTemplate', value);\n }\n\n\n /**\n * Specifies which data field provides keys for TreeView items.\n \n */\n @Input()\n get keyExpr(): ((item: any) => any) | string {\n return this._getOption('keyExpr');\n }\n set keyExpr(value: ((item: any) => any) | string) {\n this._setOption('keyExpr', value);\n }\n\n\n /**\n * Specifies the text or HTML markup displayed by the UI component if the item collection is empty.\n \n */\n @Input()\n get noDataText(): string {\n return this._getOption('noDataText');\n }\n set noDataText(value: string) {\n this._setOption('noDataText', value);\n }\n\n\n /**\n * Specifies the name of the data source item field for holding the parent key of the corresponding node.\n \n */\n @Input()\n get parentIdExpr(): ((item: any) => any | undefined) | string {\n return this._getOption('parentIdExpr');\n }\n set parentIdExpr(value: ((item: any) => any | undefined) | string) {\n this._setOption('parentIdExpr', value);\n }\n\n\n /**\n * Specifies the root key.\n \n */\n @Input()\n get rootValue(): any {\n return this._getOption('rootValue');\n }\n set rootValue(value: any) {\n this._setOption('rootValue', value);\n }\n\n\n /**\n * Switches the UI component to a right-to-left representation.\n \n */\n @Input()\n get rtlEnabled(): boolean {\n return this._getOption('rtlEnabled');\n }\n set rtlEnabled(value: boolean) {\n this._setOption('rtlEnabled', value);\n }\n\n\n /**\n * A string value specifying available scrolling directions.\n \n */\n @Input()\n get scrollDirection(): ScrollDirection {\n return this._getOption('scrollDirection');\n }\n set scrollDirection(value: ScrollDirection) {\n this._setOption('scrollDirection', value);\n }\n\n\n /**\n * Configures the search panel.\n \n */\n @Input()\n get searchEditorOptions(): dxTextBoxOptions<any> {\n return this._getOption('searchEditorOptions');\n }\n set searchEditorOptions(value: dxTextBoxOptions<any>) {\n this._setOption('searchEditorOptions', value);\n }\n\n\n /**\n * Specifies whether the search panel is visible.\n \n */\n @Input()\n get searchEnabled(): boolean {\n return this._getOption('searchEnabled');\n }\n set searchEnabled(value: boolean) {\n this._setOption('searchEnabled', value);\n }\n\n\n /**\n * Specifies a data object&apos;s field name or an expression whose value is compared to the search string.\n \n */\n @Input()\n get searchExpr(): Array<Function | string> | Function | string {\n return this._getOption('searchExpr');\n }\n set searchExpr(value: Array<Function | string> | Function | string) {\n this._setOption('searchExpr', value);\n }\n\n\n /**\n * Specifies a comparison operation used to search UI component items.\n \n */\n @Input()\n get searchMode(): SearchMode {\n return this._getOption('searchMode');\n }\n set searchMode(value: SearchMode) {\n this._setOption('searchMode', value);\n }\n\n\n /**\n * Specifies a delay in milliseconds between when a user finishes typing, and the search is executed.\n \n */\n @Input()\n get searchTimeout(): number | undefined {\n return this._getOption('searchTimeout');\n }\n set searchTimeout(value: number | undefined) {\n this._setOption('searchTimeout', value);\n }\n\n\n /**\n * Specifies the current search string.\n \n */\n @Input()\n get searchValue(): string {\n return this._getOption('searchValue');\n }\n set searchValue(value: string) {\n this._setOption('searchValue', value);\n }\n\n\n /**\n * Specifies the text displayed at the &apos;Select All&apos; check box.\n \n */\n @Input()\n get selectAllText(): string {\n return this._getOption('selectAllText');\n }\n set selectAllText(value: string) {\n this._setOption('selectAllText', value);\n }\n\n\n /**\n * Specifies whether an item is selected if a user clicks it.\n \n */\n @Input()\n get selectByClick(): boolean {\n return this._getOption('selectByClick');\n }\n set selectByClick(value: boolean) {\n this._setOption('selectByClick', value);\n }\n\n\n /**\n * Specifies the name of the data source item field whose value defines whether or not the corresponding UI component items is selected.\n \n */\n @Input()\n get selectedExpr(): ((item: any, value: boolean | undefined) => boolean | undefined) | string {\n return this._getOption('selectedExpr');\n }\n set selectedExpr(value: ((item: any, value: boolean | undefined) => boolean | undefined) | string) {\n this._setOption('selectedExpr', value);\n }\n\n\n /**\n * Specifies item selection mode. Applies only if selection is enabled.\n \n */\n @Input()\n get selectionMode(): SingleOrMultiple {\n return this._getOption('selectionMode');\n }\n set selectionMode(value: SingleOrMultiple) {\n this._setOption('selectionMode', value);\n }\n\n\n /**\n * Specifies whether selection is updated between child and parent nodes. Applies only if the selectionMode is &apos;multiple&apos;.\n \n */\n @Input()\n get selectNodesRecursive(): boolean {\n return this._getOption('selectNodesRecursive');\n }\n set selectNodesRecursive(value: boolean) {\n this._setOption('selectNodesRecursive', value);\n }\n\n\n /**\n * Specifies the checkbox display mode.\n \n */\n @Input()\n get showCheckBoxesMode(): TreeViewCheckBoxMode {\n return this._getOption('showCheckBoxesMode');\n }\n set showCheckBoxesMode(value: TreeViewCheckBoxMode) {\n this._setOption('showCheckBoxesMode', value);\n }\n\n\n /**\n * Specifies the number of the element when the Tab key is used for navigating.\n \n */\n @Input()\n get tabIndex(): number {\n return this._getOption('tabIndex');\n }\n set tabIndex(value: number) {\n this._setOption('tabIndex', value);\n }\n\n\n /**\n * Specifies whether or not the UI component uses native scrolling.\n \n */\n @Input()\n get useNativeScrolling(): boolean {\n return this._getOption('useNativeScrolling');\n }\n set useNativeScrolling(value: boolean) {\n this._setOption('useNativeScrolling', value);\n }\n\n\n /**\n * Enables the virtual mode in which nodes are loaded on demand. Use it to enhance the performance on large datasets.\n \n */\n @Input()\n get virtualModeEnabled(): boolean {\n return this._getOption('virtualModeEnabled');\n }\n set virtualModeEnabled(value: boolean) {\n this._setOption('virtualModeEnabled', value);\n }\n\n\n /**\n * Specifies whether the UI component is visible.\n \n */\n @Input()\n get visible(): boolean {\n return this._getOption('visible');\n }\n set visible(value: boolean) {\n this._setOption('visible', value);\n }\n\n\n /**\n * Specifies the UI component&apos;s width.\n \n */\n @Input()\n get width(): number | string | undefined {\n return this._getOption('width');\n }\n set width(value: number | string | undefined) {\n this._setOption('width', value);\n }\n\n /**\n \n * A function that is executed when the UI component is rendered and each time the component is repainted.\n \n \n */\n @Output() onContentReady: EventEmitter<ContentReadyEvent>;\n\n /**\n \n * A function that is executed before the UI component is disposed of.\n \n \n */\n @Output() onDisposing: EventEmitter<DisposingEvent>;\n\n /**\n \n * A function used in JavaScript frameworks to save the UI component instance.\n \n \n */\n @Output() onInitialized: EventEmitter<InitializedEvent>;\n\n /**\n \n * A function that is executed when a collection item is clicked or tapped.\n \n \n */\n @Output() onItemClick: EventEmitter<ItemClickEvent>;\n\n /**\n \n * A function that is executed when a tree view item is collapsed.\n \n \n */\n @Output() onItemCollapsed: EventEmitter<ItemCollapsedEvent>;\n\n /**\n \n * A function that is executed when a collection item is right-clicked or pressed.\n \n \n */\n @Output() onItemContextMenu: EventEmitter<ItemContextMenuEvent>;\n\n /**\n \n * A function that is executed when a tree view item is expanded.\n \n \n */\n @Output() onItemExpanded: EventEmitter<ItemExpandedEvent>;\n\n /**\n \n * A function that is executed when a collection item has been held for a specified period.\n \n \n */\n @Output() onItemHold: EventEmitter<ItemHoldEvent>;\n\n /**\n \n * A function that is executed after a collection item is rendered.\n \n \n */\n @Output() onItemRendered: EventEmitter<ItemRenderedEvent>;\n\n /**\n \n * A function that is executed when a single TreeView item is selected or selection is canceled.\n \n \n */\n @Output() onItemSelectionChanged: EventEmitter<ItemSelectionChangedEvent>;\n\n /**\n \n * A function that is executed after a UI component property is changed.\n \n \n */\n @Output() onOptionChanged: EventEmitter<OptionChangedEvent>;\n\n /**\n \n * A function that is executed when the &apos;Select All&apos; check box value is changed. Applies only if showCheckBoxesMode is &apos;selectAll&apos; and selectionMode is &apos;multiple&apos;.\n \n \n */\n @Output() onSelectAllValueChanged: EventEmitter<SelectAllValueChangedEvent>;\n\n /**\n \n * A function that is executed when a TreeView item is selected or selection is canceled.\n \n \n */\n @Output() onSelectionChanged: EventEmitter<SelectionChangedEvent>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() accessKeyChange: EventEmitter<string | undefined>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() activeStateEnabledChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() animationEnabledChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() collapseIconChange: EventEmitter<null | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() createChildrenChange: EventEmitter<((parentNode: dxTreeViewNode) => any | Array<Record<string, any>>)>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() dataSourceChange: EventEmitter<Array<dxTreeViewItem> | DataSource | DataSourceOptions | null | Store | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() dataStructureChange: EventEmitter<DataStructure>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() disabledChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() disabledExprChange: EventEmitter<((item: any) => boolean | undefined) | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() disabledNodeSelectionModeChange: EventEmitter<DisabledNodeSelectionMode>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() displayExprChange: EventEmitter<((item: any) => string) | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() elementAttrChange: EventEmitter<Record<string, any>>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() expandAllEnabledChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() expandedExprChange: EventEmitter<((item: any, value: boolean | undefined) => boolean | undefined) | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() expandEventChange: EventEmitter<TreeViewExpandEvent>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() expandIconChange: EventEmitter<null | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() expandNodesRecursiveChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() focusStateEnabledChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() hasItemsExprChange: EventEmitter<((item: any) => boolean | undefined) | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() heightChange: EventEmitter<number | string | undefined>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() hintChange: EventEmitter<string | undefined>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() hoverStateEnabledChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() itemHoldTimeoutChange: EventEmitter<number>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() itemsChange: EventEmitter<Array<any | dxTreeViewItem>>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() itemsExprChange: EventEmitter<((item: any) => Array<any> | undefined) | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() itemTemplateChange: EventEmitter<any>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() keyExprChange: EventEmitter<((item: any) => any) | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() noDataTextChange: EventEmitter<string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() parentIdExprChange: EventEmitter<((item: any) => any | undefined) | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() rootValueChange: EventEmitter<any>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() rtlEnabledChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() scrollDirectionChange: EventEmitter<ScrollDirection>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() searchEditorOptionsChange: EventEmitter<dxTextBoxOptions<any>>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() searchEnabledChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() searchExprChange: EventEmitter<Array<Function | string> | Function | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() searchModeChange: EventEmitter<SearchMode>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() searchTimeoutChange: EventEmitter<number | undefined>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() searchValueChange: EventEmitter<string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() selectAllTextChange: EventEmitter<string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() selectByClickChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() selectedExprChange: EventEmitter<((item: any, value: boolean | undefined) => boolean | undefined) | string>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() selectionModeChange: EventEmitter<SingleOrMultiple>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() selectNodesRecursiveChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() showCheckBoxesModeChange: EventEmitter<TreeViewCheckBoxMode>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() tabIndexChange: EventEmitter<number>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() useNativeScrollingChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() virtualModeEnabledChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() visibleChange: EventEmitter<boolean>;\n\n /**\n \n * This member supports the internal infrastructure and is not intended to be used directly from your code.\n \n */\n @Output() widthChange: EventEmitter<number | string | undefined>;\n\n\n\n\n constructor(elementRef: ElementRef, ngZone: NgZone, templateHost: DxTemplateHost,\n private _watcherHelper: WatcherHelper,\n private _idh: IterableDifferHelper,\n optionHost: NestedOptionHost,\n transferState: TransferState,\n @Inject(PLATFORM_ID) platformId: any) {\n\n super(elementRef, ngZone, templateHost, _watcherHelper, transferState, platformId);\n\n this._createEventEmitters([\n { subscribe: 'contentReady', emit: 'onContentReady' },\n { subscribe: 'disposing', emit: 'onDisposing' },\n { subscribe: 'initialized', emit: 'onInitialized' },\n { subscribe: 'itemClick', emit: 'onItemClick' },\n { subscribe: 'itemCollapsed', emit: 'onItemCollapsed' },\n { subscribe: 'itemContextMenu', emit: 'onItemContextMenu' },\n { subscribe: 'itemExpanded', emit: 'onItemExpanded' },\n { subscribe: 'itemHold', emit: 'onItemHold' },\n { subscribe: 'itemRendered', emit: 'onItemRendered' },\n { subscribe: 'itemSelectionChanged', emit: 'onItemSelectionChanged' },\n { subscribe: 'optionChanged', emit: 'onOptionChanged' },\n { subscribe: 'selectAllValueChanged', emit: 'onSelectAllValueChanged' },\n { subscribe: 'selectionChanged', emit: 'onSelectionChanged' },\n { emit: 'accessKeyChange' },\n { emit: 'activeStateEnabledChange' },\n { emit: 'animationEnabledChange' },\n { emit: 'collapseIconChange' },\n { emit: 'createChildrenChange' },\n { emit: 'dataSourceChange' },\n { emit: 'dataStructureChange' },\n { emit: 'disabledChange' },\n { emit: 'disabledExprChange' },\n { emit: 'disabledNodeSelectionModeChange' },\n { emit: 'displayExprChange' },\n { emit: 'elementAttrChange' },\n { emit: 'expandAllEnabledChange' },\n { emit: 'expandedExprChange' },\n { emit: 'expandEventChange' },\n { emit: 'expandIconChange' },\n { emit: 'expandNodesRecursiveChange' },\n { emit: 'focusStateEnabledChange' },\n { emit: 'hasItemsExprChange' },\n { emit: 'heightChange' },\n { emit: 'hintChange' },\n { emit: 'hoverStateEnabledChange' },\n { emit: 'itemHoldTimeoutChange' },\n { emit: 'itemsChange' },\n { emit: 'itemsExprChange' },\n { emit: 'itemTemplateChange' },\n { emit: 'keyExprChange' },\n { emit: 'noDataTextChange' },\n { emit: 'parentIdExprChange' },\n { emit: 'rootValueChange' },\n { emit: 'rtlEnabledChange' },\n { emit: 'scrollDirectionChange' },\n { emit: 'searchEditorOptionsChange' },\n { emit: 'searchEnabledChange' },\n { emit: 'searchExprChange' },\n { emit: 'searchModeChange' },\n { emit: 'searchTimeoutChange' },\n { emit: 'searchValueChange' },\n { emit: 'selectAllTextChange' },\n { emit: 'selectByClickChange' },\n { emit: 'selectedExprChange' },\n { emit: 'selectionModeChange' },\n { emit: 'selectNodesRecursiveChange' },\n { emit: 'showCheckBoxesModeChange' },\n { emit: 'tabIndexChange' },\n { emit: 'useNativeScrollingChange' },\n { emit: 'virtualModeEnabledChange' },\n { emit: 'visibleChange' },\n { emit: 'widthChange' }\n ]);\n\n this._idh.setHost(this);\n optionHost.setHost(this);\n }\n\n protected _createInstance(element, options) {\n\n return new DxTreeView(element, options);\n }\n\n\n ngOnDestroy() {\n this._destroyWidget();\n }\n\n ngOnChanges(changes: SimpleChanges) {\n super.ngOnChanges(changes);\n this.setupChanges('dataSource', changes);\n this.setupChanges('items', changes);\n this.setupChanges('searchExpr', changes);\n }\n\n setupChanges(prop: string, changes: SimpleChanges) {\n if (!(prop in this._optionsToUpdate)) {\n this._idh.setup(prop, changes);\n }\n }\n\n ngDoCheck() {\n this._idh.doCheck('dataSource');\n this._idh.doCheck('items');\n this._idh.doCheck('searchExpr');\n this._watcherHelper.checkWatchers();\n super.ngDoCheck();\n super.clearChangedOptions();\n }\n\n _setOption(name: string, value: any) {\n let isSetup = this._idh.setupSingle(name, value);\n let isChanged = this._idh.getChanges(name, value) !== null;\n\n if (isSetup || isChanged) {\n super._setOption(name, value);\n }\n }\n}\n\n@NgModule({\n imports: [\n DxTreeViewComponent,\n DxiItemModule,\n DxoSearchEditorOptionsModule,\n DxiButtonModule,\n DxoOptionsModule,\n DxiTreeViewButtonModule,\n DxiTreeViewItemModule,\n DxoTreeViewOptionsModule,\n DxoTreeViewSearchEditorOptionsModule,\n DxIntegrationModule,\n DxTemplateModule\n ],\n exports: [\n DxTreeViewComponent,\n DxiItemModule,\n DxoSearchEditorOptionsModule,\n DxiButtonModule,\n DxoOptionsModule,\n DxiTreeViewButtonModule,\n DxiTreeViewItemModule,\n DxoTreeViewOptionsModule,\n DxoTreeViewSearchEditorOptionsModule,\n DxTemplateModule\n ]\n})\nexport class DxTreeViewModule { }\n\nexport * from 'devextreme-angular/ui/tree-view/nested';\n\nimport type * as DxTreeViewTypes from \"devextreme/ui/tree_view_types\";\nexport { DxTreeViewTypes };\n\n\n","/**\n * Generated bundle index. 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