import { AfterViewInit, ChangeDetectorRef, EventEmitter, OnDestroy, QueryList, TrackByFunction } from '@angular/core';
import { MatTreeFlatDataSource } from '@angular/material/tree';
import { CdkVirtualScrollViewport } from '@angular/cdk/scrolling';
import { ITreeNode, IFlatNodeObject } from './models/tree.models';
import { UiTreeItemComponent } from './ui-tree-item/ui-tree-item.component';
import * as i0 from "@angular/core";
export declare class UiTreeSelectComponent implements AfterViewInit, OnDestroy {
    private _cd;
    items: QueryList<UiTreeItemComponent>;
    headerTemplate?: any;
    itemTemplate?: any;
    itemSize: number;
    expandOnSelect: boolean;
    loading: boolean;
    /**
     * Path of keys key to the node that will be selected by default. The node must be present in the data array
     * If the node is a lower level node, the parent nodes must be present in the data array and then they will be expanded automatically
     */
    set initialSelection(value: string[] | null);
    itemPadding: string;
    /**
     * Emits an array of the selected nodes (keep in mind they are clones of the original nodes)
     */
    selected: EventEmitter<ITreeNode<any>[]>;
    /**
     * Emits a clone of the original node when it's expanded
     */
    expanded: EventEmitter<ITreeNode<any>>;
    /**
     * Emits a clone of the original node when it's collapsed
     */
    collapsed: EventEmitter<ITreeNode<any>>;
    /**
     * An array of nodes. Keep in mind they will be flattened when rendered in the tree
     */
    set data(value: ITreeNode[] | null);
    get dataSource(): MatTreeFlatDataSource<ITreeNode<any>, IFlatNodeObject<any>, string | number>;
    viewport?: CdkVirtualScrollViewport;
    currentSelectedNodes: Map<string, IFlatNodeObject<any>>;
    private _keyManager;
    private _treeControl;
    private _dataSource;
    private _initialSelection;
    private _connectedData$;
    private _selectNode$;
    private _destroyed$;
    constructor(_cd: ChangeDetectorRef);
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    onKeydown(event: KeyboardEvent): void;
    isExpanded(node: IFlatNodeObject): boolean;
    isSelected(node: IFlatNodeObject): boolean;
    trackById(_idx: number, node: IFlatNodeObject): TrackByFunction<IFlatNodeObject>;
    select(node: IFlatNodeObject, opts?: {
        emitEvent: boolean;
    }): void;
    expand(node: IFlatNodeObject, opts?: {
        emitEvent: boolean;
    }): void;
    collapse(node: IFlatNodeObject): void;
    toggle(node: IFlatNodeObject): ($event: MouseEvent) => void;
    collapseAll(): void;
    private _preventDefault;
    private _customKeydownHandle;
    private _selectInitialNode;
    private _handleArrowLeft;
    private _isNodeInViewport;
    /**
     * The index of an item in the rendered items array (or the list manager items)
     * is different than the index of an item in the initial data array
     *
     * @param key the key of a node
     * @returns the index of the node in the rendered items array
     */
    private _convertKeyToRenderedItemsIndex;
    static ɵfac: i0.ɵɵFactoryDeclaration<UiTreeSelectComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<UiTreeSelectComponent, "ui-tree-select", never, { "itemSize": "itemSize"; "expandOnSelect": "expandOnSelect"; "loading": "loading"; "initialSelection": "initialSelection"; "itemPadding": "itemPadding"; "data": "data"; }, { "selected": "selected"; "expanded": "expanded"; "collapsed": "collapsed"; }, ["headerTemplate", "itemTemplate"], ["[noDataMessage]"], true, never>;
}