import { OnInit, EventEmitter } from '@angular/core';
import { Observable } from 'rxjs';
import { ContextMenuComponent } from '@progress/kendo-angular-menu';
export declare type TreeViewLoadFunc = (parent: any, filter: string) => any[] | Observable<any[]>;
export interface ContextMenuItemSelectData {
    node: any;
    menuItem: any;
}
export declare class TreeViewComponent implements OnInit {
    constructor();
    ngOnInit(): void;
    private _loadFunc;
    private _cache;
    /** private */
    _firstLevelNodes: any[];
    /**  determines whether caching mechanism is enabled or not */
    cacheNodes: boolean;
    /**  The fields of the data item that provide the text content of the nodes */
    textField: string;
    /** A function which determines if a node has any children */
    hasChildrenFunc: <T>(item: T) => boolean;
    /** A function which provides nodes */
    set loadFunc(value: TreeViewLoadFunc);
    get loadFunc(): TreeViewLoadFunc;
    /** Reloads the treeview (calls loadFunc() function again to load first level items) */
    reload(): void;
    /** private */
    _childrenFunc: (item: any) => Observable<any>;
    filterable: boolean;
    filter: string;
    filterPlaceholder: string;
    filterChange: EventEmitter<string>;
    /** clears the filter */
    clearFilter(): void;
    /** private */
    _contextMenu: ContextMenuComponent;
    private _rightClickedItem;
    /** context menu items */
    contextMenuItems: {
        text: string;
        icon?: string;
        data?: any;
    }[];
    /** Fires when the user selects a context menu item */
    contextMenuItemSelect: EventEmitter<ContextMenuItemSelectData>;
    /** private */
    _onNodeClick(e: any): void;
    /** private */
    _onMenuItemSelect({ item }: {
        item: any;
    }): void;
    /** A function which determines if a specific node is disabled or not */
    isNodeDisabledFunc: any;
    /** Determines if selection functionality is enabled or not */
    selectable: boolean | {
        enabled?: boolean;
        mode?: 'single' | 'multiple';
    };
    /** Fires when selected item changes. */
    selectionChange: EventEmitter<any>;
    /** Fires when a node is clicked by user */
    nodeClick: EventEmitter<any>;
    /** Determines if 'checkable' functionality is enabled or not */
    checkable: boolean | {
        enabled?: boolean;
        mode?: 'single' | 'multiple';
        checkChildren?: boolean;
        checkParents?: boolean;
        checkOnClick?: boolean;
    };
}