import { OnInit, EventEmitter, AfterViewInit, OnDestroy } from '@angular/core';
import { SelectionModel } from '@angular/cdk/collections';
import { FlatTreeControl } from '@angular/cdk/tree';
import { MatTreeFlattener, MatTreeFlatDataSource } from '@angular/material/tree';
import { NmTransferPickerService } from './transfer-picker.service';
import { SourceOptions, TransferItemFlatNode, TransferItemNode } from './interface';
export declare class NmTransferPickerSourceComponent implements OnInit, AfterViewInit, OnDestroy {
    private service;
    checklistChange: EventEmitter<any>;
    /** Map from nested node to flattened node. This helps us to keep the same object for selection */
    nestedNodeMap: Map<TransferItemNode, TransferItemFlatNode>;
    treeControl: FlatTreeControl<TransferItemFlatNode>;
    treeFlattener: MatTreeFlattener<TransferItemNode, TransferItemFlatNode>;
    dataSource: MatTreeFlatDataSource<TransferItemNode, TransferItemFlatNode>;
    /** The selection for checklist */
    checklistSelection: SelectionModel<TransferItemFlatNode>;
    options: SourceOptions;
    selectedList: Array<TransferItemFlatNode>;
    private ngUnsubscribe;
    constructor(service: NmTransferPickerService);
    ngOnInit(): void;
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    getSelectedList(): Array<TransferItemNode>;
    resetSelectedItem(item: TransferItemFlatNode): void;
    private getLevel;
    private isExpandable;
    private getChildren;
    hasChild: (_: number, _nodeData: TransferItemFlatNode) => boolean;
    /**
     * Transformer to convert nested node to flat node. Record the nodes in maps for later use.
     */
    private transformer;
    /** Whether all the descendants of the node are selected */
    descendantsAllSelected(node: TransferItemFlatNode): boolean;
    /** Whether part of the descendants are selected */
    descendantsPartiallySelected(node: TransferItemFlatNode): boolean;
    /** Toggle the transfer item selection. Select/deselect all the descendants node */
    transferItemSelectionToggle(node: TransferItemFlatNode): void;
    /** Toggle a leaf transfer item selection. Check all the parents to see if they changed */
    transferLeafItemSelectionToggle(node: TransferItemFlatNode): void;
    private checkAllParentsSelection;
    /** Check root node checked state and change it accordingly */
    private checkRootNodeSelection;
    private getParentNode;
}