/**-----------------------------------------------------------------------------------------
* Copyright © 2026 Progress Software Corporation. All rights reserved.
* Licensed under commercial license. See LICENSE.md in the project root for more information
*-------------------------------------------------------------------------------------------*/
import { OnInit, OnDestroy, ElementRef, EventEmitter, NgZone, Renderer2, TemplateRef, ChangeDetectorRef, SimpleChanges, OnChanges, ViewContainerRef, AfterContentChecked, Injector } from '@angular/core';
import { AdaptiveSize, AdaptiveService } from '@progress/kendo-angular-utils';
import { PopupRef, PopupService } from '@progress/kendo-angular-popup';
import { TreeItem, TreeViewComponent, DataBoundComponent, ExpandableComponent } from '@progress/kendo-angular-treeview';
import { ControlValueAccessor, FormControl } from '@angular/forms';
import { NavigationService } from '../common/navigation/navigation.service';
import { LocalizationService } from '@progress/kendo-angular-l10n';
import { PreventableEvent } from '../common/models/preventable-event';
import { AdaptiveMode } from '../common/util';
import { NoDataTemplateDirective } from '../common/templates/no-data-template.directive';
import { PopupSettings } from '../common/models/popup-settings';
import { Direction } from '../common/models/direction';
import { Observable } from 'rxjs';
import { HeaderTemplateDirective } from '../common/templates/header-template.directive';
import { FooterTemplateDirective } from '../common/templates/footer-template.directive';
import { NodeTemplateDirective } from './templates/node-template.directive';
import { ValueTemplateDirective } from '../common/templates/value-template.directive';
import { DropDownSize } from '../common/models/size';
import { DropDownRounded } from '../common/models/rounded';
import { DropDownFillMode } from '../common/models/fillmode';
import { SVGIcon } from '@progress/kendo-svg-icons';
import { ActionSheetComponent } from '@progress/kendo-angular-navigation';
import { TextBoxComponent } from '@progress/kendo-angular-inputs';
import { AdaptiveRendererComponent } from '../common/adaptive-renderer.component';
import * as i0 from "@angular/core";
/**
 * Represents the [Kendo UI DropDownTree component for Angular]({% slug overview_ddt %}).
 * @example
 * ```html
 * <kendo-dropdowntree [data]="data" textField="text" valueField="value"></kendo-dropdowntree>
 * ```
 *
 * @remarks
 * Supported children components are: {@link CustomMessagesComponent}.
 */
export declare class DropDownTreeComponent implements OnInit, OnDestroy, OnChanges, AfterContentChecked, ControlValueAccessor, DataBoundComponent, ExpandableComponent {
    private injector;
    wrapper: ElementRef<HTMLElement>;
    private popupService;
    private navigationService;
    private renderer;
    private _zone;
    private cdr;
    private localization;
    private adaptiveService;
    /**
     * @hidden
     */
    icon: string;
    /**
     * @hidden
     */
    svgIcon: SVGIcon;
    /**
     * @hidden
     */
    touchEnabled: any;
    /**
     * @hidden
     */
    animationDuration: number;
    /**
     * @hidden
     */
    searchIcon: SVGIcon;
    /**
     * @hidden
     */
    caretAltDownIcon: SVGIcon;
    /**
     * @hidden
     */
    xIcon: SVGIcon;
    /**
     * @hidden
     */
    adaptiveRendererComponent: AdaptiveRendererComponent;
    /**
     * @hidden
     */
    get actionSheet(): ActionSheetComponent;
    /**
     * @hidden
     */
    get actionSheetSearchBar(): TextBoxComponent;
    hostClasses: boolean;
    get isReadonly(): string;
    get hostAriaInvalid(): boolean | null;
    get isDisabled(): boolean | null;
    get isLoading(): boolean;
    get isBusy(): string;
    get hostAriaControls(): string;
    get id(): string;
    direction: Direction;
    get hostTabIndex(): number;
    role: string;
    ariaHasPopup: string;
    get isAriaExpanded(): boolean;
    get hostAriaAutocomplete(): string;
    noDataTemplate: NoDataTemplateDirective;
    headerTemplate: HeaderTemplateDirective;
    footerTemplate: FooterTemplateDirective;
    nodeTemplate: NodeTemplateDirective;
    valueTemplate: ValueTemplateDirective;
    popupTemplate: TemplateRef<any>;
    container: ViewContainerRef;
    set treeview(treeview: TreeViewComponent);
    get treeview(): TreeViewComponent;
    private filterInput;
    /**
     * Fires each time the popup is about to open
     * ([see example]({% slug openstate_ddt %})).
     * This event is preventable. If you cancel it, the popup will remain closed.
     */
    open: EventEmitter<PreventableEvent>;
    /**
     * Fires after the popup has been opened.
     */
    opened: EventEmitter<any>;
    /**
     * Fires each time the popup is about to close
     * ([see example]({% slug openstate_ddt %})).
     * This event is preventable. If you cancel it, the popup will remain open.
     */
    close: EventEmitter<PreventableEvent>;
    /**
     * Fires after the popup has been closed.
     */
    closed: EventEmitter<any>;
    /**
     * Fires when the user expands a node in the popup TreeView.
     */
    nodeExpand: EventEmitter<TreeItem>;
    /**
     * Fires when the user collapses a node in the popup TreeView.
     */
    nodeCollapse: EventEmitter<TreeItem>;
    /**
     * Fires each time the user focuses the DropDownTree.
     */
    onFocus: EventEmitter<any>;
    /**
     * Fires each time the DropDownTree gets blurred.
     */
    onBlur: EventEmitter<any>;
    /**
     * Fires each time the value is changed
     * ([see example](slug:events_ddt)).
     */
    valueChange: EventEmitter<any>;
    /**
     * Fires when the value of the built-in filter input element changes.
     */
    filterChange: EventEmitter<string>;
    /**
     * Sets and gets the loading state of the DropDownTree.
     */
    loading: boolean;
    /**
     * If set to `true`, renders a button on hovering over the component.
     * Clicking this button resets the value of the component to `undefined` and triggers the `change` event.
     */
    clearButton: boolean;
    /**
     * Sets the data of the DropDownTree.
     *
     * > The data has to be provided in an array-like list with objects.
     */
    set data(data: object[]);
    get data(): object[];
    /**
     * Sets the value of the DropDownTree.
     * It can either be of the primitive (string, numbers) or of the complex (objects) type.
     * To define the type, use the `valuePrimitive` option.
     *
     */
    set value(newValue: any);
    get value(): any;
    /**
     * The fields of the data item that provide the text content of the nodes inside the
     * DropDownTree ([see example]({% slug databinding_ddt %})). If the `textField`
     * input is set to an array, each hierarchical level uses the field that corresponds
     * to the same index in the array, or the last item in the array.
     *
     * > The `textField` property can be set to point to a nested property value - e.g. `category.name`.
     */
    textField: string | string[];
    /**
     * The fields of the data item that provide the value of the nodes inside the
     * DropDownTree ([see example]({% slug databinding_ddt %})). If the `valueField`
     * input is set to an array, each hierarchical level uses the field that corresponds
     * to the same index in the array, or the last item in the array.
     *
     * > The `valueField` property can be set to point to a nested property value - e.g. `category.id`.
     */
    valueField: string | string[];
    /**
     * Sets the level in the data set where the value can be found when `valueField` is an Array.
     * The field serves to correctly allocate a data item used when the DropDownTree is initialized with a value.
     */
    valueDepth: number;
    /**
     * A function which determines if a specific node has child nodes.
     */
    hasChildren: (node: object) => boolean;
    /**
     * A function which provides the child nodes for a given parent node.
     */
    fetchChildren: (node: object) => Observable<object[]>;
    /**
     * Sets the placeholder of the input element of the DropDownTree.
     */
    placeholder: string;
    /**
     * Configures the popup of the DropDownTree.
     *
     * The available options are:
     * - `animate: Boolean`&mdash;Controls the popup animation. By default, the open and close animations are enabled.
     * - `width: Number | String`&mdash;Sets the width of the popup container. By default, the width of the host element is used. If set to `auto`, the component automatically adjusts the width of the popup and no item labels are wrapped.
     * - `height: Number`&mdash;Sets the height of the popup container.
     * - `popupClass: String`&mdash;Specifies a list of CSS classes that are used to style the popup.
     * - `appendTo: "root" | "component" | ViewContainerRef`&mdash;Specifies the component to which the popup will be appended.
     */
    set popupSettings(settings: PopupSettings);
    get popupSettings(): PopupSettings;
    /**
     * Keeps the current `dataItem` object in order to resolve selection.
     * Needs to be provided when `value` is bound in and `valuePrimitive` is set to true.
     */
    set dataItem(item: object);
    get dataItem(): object;
    /**
     * Sets the height of the options list in the popup. By default, `listHeight` is 200px.
     *
     * > The `listHeight` property affects only the list of options and not the whole popup container.
     * > To set the height of the popup container, use `popupSettings.height`.
     *
     * When using `adaptiveMode` and the screen size is `small` or `medium` the `listHeight` property is set to null.
     */
    set listHeight(_listHeight: number);
    get listHeight(): number;
    private _listHeight;
    /**
     * Sets the disabled state of the component. To learn how to disable the component in reactive forms, refer to the article on [Forms Support](slug:formssupport_ddt#toc-managing-the-dropdowntree-disabled-state-in-reactive-forms).
     */
    disabled: boolean;
    /**
     * Sets the read-only state of the component.
     *
     * @default false
     */
    readonly: boolean;
    /**
     * Specifies the type of the selected value
     * ([more information and example]({% slug valuebinding_ddt %}#toc-primitive-values)).
     * If set to `true`, the selected value has to be of a primitive value.
     */
    valuePrimitive: boolean;
    /**
     * Specifies the [`tabindex`](https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/tabindex) of the component.
     */
    set tabindex(value: number);
    get tabindex(): number;
    /**
     * Sets the size of the component.
     *
     * The possible values are:
     * * `small`
     * * `medium` (default)
     * * `large`
     * * `none`
     *
     */
    set size(size: DropDownSize);
    get size(): DropDownSize;
    /**
     * Sets the border radius of the component.
     *
     * The possible values are:
     * * `small`
     * * `medium` (default)
     * * `large`
     * * `full`
     * * `none`
     *
     */
    set rounded(rounded: DropDownRounded);
    get rounded(): DropDownRounded;
    /**
     * Sets the fillMode of the component.
     *
     * The possible values are:
     * * `flat`
     * * `solid` (default)
     * * `outline`
     * * `none`
     *
     */
    set fillMode(fillMode: DropDownFillMode);
    get fillMode(): DropDownFillMode;
    /**
     * A function that is executed for each data item and determines if a specific item is disabled.
     */
    itemDisabled: (item: object, index: string) => boolean;
    /**
     * A function that is executed for each data item and determines if a specific node is expanded.
     */
    isNodeExpanded: (item: object, index: string) => boolean;
    /**
     * A callback which determines whether a tree node should be rendered as hidden. The utility `.k-hidden` class is used to hide the nodes.
     * Useful for custom filtering implementations.
     */
    isNodeVisible: (item: object, index: string) => boolean;
    /**
     * Indicates whether the child nodes will be fetched on node expand or will be initially prefetched.
     * @default true
     */
    loadOnDemand: boolean;
    /**
     * Renders the built-in input element for filtering the DropDownTree.
     * If set to `true`, the component emits the `filterChange` event, which can be used to [filter the DropDownTree manually]({% slug filtering_ddt %}#toc-manual-filtering).
     * A built-in filtering implementation is available to use with the [`kendoDropDownTreeHierarchyBinding`]({% slug api_dropdowns_dropdowntreehierarchybindingdirective %}) and [`kendoDropDownTreeFlatBinding`]({% slug api_dropdowns_dropdowntreeflatbindingdirective %}) directives.
     */
    filterable: boolean;
    /**
     * @hidden
     */
    filter: string;
    /**
     * @hidden
     *
     * Used by the kendo-label and kendo-floatinglabel to access and associate the focusable element with the provided label via aria-labelledby.
     */
    focusableId: string;
    set isFocused(isFocused: boolean);
    get isFocused(): boolean;
    get width(): {
        min: string;
        max: string;
    };
    get height(): string;
    /**
     * Returns the current open state. Returns `true` if the popup or actionSheet is open.
     */
    get isOpen(): boolean;
    get clearButtonVisibility(): string;
    private get isFilterActive();
    popupRef: PopupRef;
    /**
     * @hidden
     */
    selectedKeys: any[];
    /**
     * @hidden
     */
    selectBy: string;
    /**
     * @hidden
     */
    text: string;
    /**
     * @hidden
     */
    onFilterChange(text: string): void;
    /**
     * Enables or disables the adaptive mode. By default the adaptive rendering is disabled.
     */
    adaptiveMode: AdaptiveMode;
    /**
     * Sets the title of the ActionSheet that is rendered instead of the Popup when using small screen devices.
     * By default the ActionSheet title uses the text provided for the label of the DropDownTree.
     */
    adaptiveTitle: string;
    /**
     * Sets the subtitle of the ActionSheet that is rendered instead of the Popup when using small screen devices.
     * By default the ActionSheet does not render a subtitle.
    */
    adaptiveSubtitle: string;
    /**
     * @hidden
     */
    get isAdaptiveModeEnabled(): boolean;
    /**
    * @hidden
    */
    windowSize: AdaptiveSize;
    /**
     * @hidden
     */
    get isActionSheetExpanded(): boolean;
    /**
     * @hidden
     */
    get isAdaptive(): boolean;
    /**
     * @hidden
     *
     * Alias for `isNodeExpanded`. Used for compatibility with the `ExpandableComponent` interface.
     * Required for the expand-directive.
     */
    set isExpanded(callback: (item: object, index: string) => boolean);
    get isExpanded(): (item: object, index: string) => boolean;
    /**
     * @hidden
     *
     * Alias for `nodeExpand`. Used for compatibility with the `ExpandableComponent` interface.
     * Required for the expand-directive.
     */
    get expand(): EventEmitter<TreeItem>;
    /**
     * @hidden
     *
     * Alias for `nodeCollapse`. Used for compatibility with the `ExpandableComponent` interface.
     * Required for the expand-directive.
     */
    get collapse(): EventEmitter<TreeItem>;
    /**
     * @hidden
     *
     * Alias for `data`. Used for compatibility with the `DataBoundComponent` interface.
     * Required for the data-binding directives.
     */
    set nodes(nodes: any[]);
    get nodes(): any[];
    /**
     * @hidden
     *
     * Alias for `fetchChildren`. Used for compatibility with the `DataBoundComponent` interface.
     * Required for the data-binding directives
     */
    set children(callback: (item: object) => Observable<object[]>);
    get children(): (item: object) => Observable<object[]>;
    /**
     * @hidden
     *
     * Alias for `isNodeVisible`. Used for compatibility with the `DataBoundComponent` interface.
     * The `DataBoundComponent` interface is used in the data-binding directives.
     */
    set isVisible(callback: (item: object, index: string) => boolean);
    get isVisible(): (item: object, index: string) => boolean;
    /**
     * @hidden
     */
    filterStateChange: EventEmitter<any>;
    /**
     * @hidden
     */
    allNodesHidden: boolean;
    /**
     * @hidden
     *
     * Used to associate the value label with the wrapper via aria-describedby.
     */
    valueLabelId: string;
    /**
     * @hidden
     */
    get formControl(): FormControl;
    treeViewId: string;
    private _nodes;
    private _value;
    private _popupSettings;
    private _tabindex;
    private _isFocused;
    private _dataItem;
    private _treeview;
    private _size;
    private _rounded;
    private _fillMode;
    private _searchableNodes;
    private _typedValue;
    private printableCharacters;
    private subs;
    private touchstartDisposeHandler;
    private lastNodeOnFocus;
    constructor(injector: Injector, wrapper: ElementRef<HTMLElement>, popupService: PopupService, navigationService: NavigationService, renderer: Renderer2, _zone: NgZone, cdr: ChangeDetectorRef, localization: LocalizationService, adaptiveService: AdaptiveService);
    ngOnInit(): void;
    /**
     * @hidden
     */
    ngOnDestroy(): void;
    /**
     * @hidden
     */
    ngOnChanges(changes: SimpleChanges): void;
    /**
     * @hidden
     */
    ngAfterContentChecked(): void;
    ngAfterViewInit(): void;
    /**
     * @hidden
     */
    onResize(): void;
    /**
     * @hidden
     *
     * Used by the kendo-floatinglabel component to determine if the floating label
     * should be rendered inside the input when the component is not focused.
     */
    isEmpty(): boolean;
    /**
     * @hidden
     */
    togglePopup(open: boolean): void;
    /**
     * @hidden
     */
    handleFocus(event: FocusEvent): void;
    /**
     * @hidden
     */
    handleBlur(e?: FocusEvent): void;
    /**
     * @hidden
     */
    handleKeydown(event: any, input?: HTMLInputElement): void;
    /**
     * Focuses a specific item of the DropDownTree based on a provided index in the format of `1_1`.
     * The targeted item should be expanded in order for it to be focused.
     * If null or invalid index is provided the focus will be set on the first item.
     */
    focusItemAt(index: string): void;
    /**
     * Focuses the DropDownTree.
     */
    focus(): void;
    /**
     * Blurs the DropDownTree.
     */
    blur(): void;
    /**
     * Resets the value of the DropDownTree.
     * If you use the `reset` method to clear the value of the component,
     * the model will not update automatically and the `valueChange` event will not be fired.
     */
    reset(): void;
    /**
     * Toggles the visibility of the popup or actionSheet.
     * ([see example]({% slug openstate_ddt %})).
     * If you use the `toggle` method to open or close the popup or actionSheet, the `open` and `close` events will not be fired.
     *
     * @param open - The state of the popup.
     */
    toggle(open?: boolean): void;
    /**
     * @hidden
     */
    get popupContainerClasses(): object;
    /**
     * @hidden
     */
    onSelectionChange({ dataItem, index }: TreeItem): void;
    /**
     * @hidden
     */
    messageFor(key: string): string;
    /**
     * @hidden
     */
    clearValue(event?: MouseEvent): void;
    get appendTo(): ViewContainerRef;
    /**
     * @hidden
     */
    preventEventDefault(event: Event): void;
    /**
     * @hidden
     */
    writeValue(value: any): void;
    /**
     * @hidden
     */
    registerOnChange(fn: any): void;
    /**
     * @hidden
     */
    registerOnTouched(fn: any): void;
    /**
     * @hidden
     */
    setDisabledState(isDisabled: boolean): void;
    /**
     * @hidden
     */
    handleFilterInputChange(input: Partial<HTMLInputElement> | string): void;
    /**
     * @hidden
     */
    get selectButtonClasses(): any;
    /**
     * @hidden
     */
    get filterInputClasses(): any;
    protected onTouchedCallback: Function;
    protected onChangeCallback: Function;
    protected verifySettings(): void;
    private emitValueChange;
    private getText;
    /**
     * @hidden
     */
    onChildrenLoaded(): void;
    /**
     * @hidden
     *
     * Determines the `valueField` and `textField` for a specific level in the data set
     *  @param field - the field value (string | string[])
     *  @param value - current value
     */
    private getField;
    private areNodesHidden;
    private triggerPopupEvents;
    private createPopup;
    private destroyPopup;
    private clearFilter;
    private handleClick;
    private handleEscape;
    private setState;
    private clearState;
    private subscribeEvents;
    private subscribeTouchEvents;
    private subscribeFocusEvents;
    private unSubscribeFocusEvents;
    private unsubscribeEvents;
    private handleDocumentBlur;
    private assignAriaDescribedBy;
    private setComponentClasses;
    /**
     * Remove the `TreeView` from the tab order, otherwise a focus loop between the page elements will occur
     * and the user will not be able to tab to the rest of the browser elements
     */
    private removeTreeViewFromTabOrder;
    private closeActionSheet;
    private openActionSheet;
    static ɵfac: i0.ɵɵFactoryDeclaration<DropDownTreeComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<DropDownTreeComponent, "kendo-dropdowntree", ["kendoDropDownTree"], { "icon": { "alias": "icon"; "required": false; }; "svgIcon": { "alias": "svgIcon"; "required": false; }; "loading": { "alias": "loading"; "required": false; }; "clearButton": { "alias": "clearButton"; "required": false; }; "data": { "alias": "data"; "required": false; }; "value": { "alias": "value"; "required": false; }; "textField": { "alias": "textField"; "required": false; }; "valueField": { "alias": "valueField"; "required": false; }; "valueDepth": { "alias": "valueDepth"; "required": false; }; "hasChildren": { "alias": "hasChildren"; "required": false; }; "fetchChildren": { "alias": "fetchChildren"; "required": false; }; "placeholder": { "alias": "placeholder"; "required": false; }; "popupSettings": { "alias": "popupSettings"; "required": false; }; "dataItem": { "alias": "dataItem"; "required": false; }; "listHeight": { "alias": "listHeight"; "required": false; }; "disabled": { "alias": "disabled"; "required": false; }; "readonly": { "alias": "readonly"; "required": false; }; "valuePrimitive": { "alias": "valuePrimitive"; "required": false; }; "tabindex": { "alias": "tabindex"; "required": false; }; "size": { "alias": "size"; "required": false; }; "rounded": { "alias": "rounded"; "required": false; }; "fillMode": { "alias": "fillMode"; "required": false; }; "itemDisabled": { "alias": "itemDisabled"; "required": false; }; "isNodeExpanded": { "alias": "isNodeExpanded"; "required": false; }; "isNodeVisible": { "alias": "isNodeVisible"; "required": false; }; "loadOnDemand": { "alias": "loadOnDemand"; "required": false; }; "filterable": { "alias": "filterable"; "required": false; }; "filter": { "alias": "filter"; "required": false; }; "focusableId": { "alias": "focusableId"; "required": false; }; "adaptiveMode": { "alias": "adaptiveMode"; "required": false; }; "adaptiveTitle": { "alias": "adaptiveTitle"; "required": false; }; "adaptiveSubtitle": { "alias": "adaptiveSubtitle"; "required": false; }; }, { "open": "open"; "opened": "opened"; "close": "close"; "closed": "closed"; "nodeExpand": "nodeExpand"; "nodeCollapse": "nodeCollapse"; "onFocus": "focus"; "onBlur": "blur"; "valueChange": "valueChange"; "filterChange": "filterChange"; }, ["noDataTemplate", "headerTemplate", "footerTemplate", "nodeTemplate", "valueTemplate"], never, true, never>;
}