import { QueryList, OnInit, OnDestroy, AfterViewInit, AfterContentInit } from '@angular/core';
import { MatOption } from '@angular/material/core';
import { MdlTreeOptionComponent } from '../components/tree-option/tree-option.component';
import * as i0 from "@angular/core";
/** Ajoute la notion de 'tree' à un mat-select. */
export declare class MdlTreeSelectDirective<K, T> implements OnInit, OnDestroy, AfterViewInit, AfterContentInit {
    private ignoreSelectChange;
    private keyToMatOption;
    private keyToTreeItemComponent;
    private select;
    private sub?;
    treeOptions: QueryList<MdlTreeOptionComponent<K, T>>;
    /** Gestion des items sélectionnés
     * - last-level: ne renvoie que les items sélectionnés qui n'ont pas d'enfants (items de dernier niveau). Cocher une case de haut niveau peut renvoyer de nombreux éléments.
     * - none: le tree est purement esthétique, il n'y aura pas de gestion de la sélection.
     */
    treeSelectionHandling: 'last-level' | 'none';
    protected get panelClass(): string[];
    ngOnInit(): void;
    ngAfterContentInit(): void;
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    getCheckboxState(key: K, considerChecked?: boolean): boolean | null;
    getValue(key: K): string;
    setActiveItem(option?: MatOption<K>): void;
    protected onOpenedChange(opened: boolean): void;
    private applyModifications;
    /** Returns true if CTRL+A has been handled. */
    private handleCtrlA;
    private handleDeselection;
    private handleExpandKeys;
    private handleSelection;
    private itemDescendantsChecked;
    private onOptionsChanged;
    private onSelectionModelChanged;
    private refreshCheckStates;
    static ɵfac: i0.ɵɵFactoryDeclaration<MdlTreeSelectDirective<any, any>, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<MdlTreeSelectDirective<any, any>, "[mdlTreeSelect]", ["mdlTreeSelect"], { "treeSelectionHandling": { "alias": "treeSelectionHandling"; "required": false; }; }, {}, ["treeOptions"], never, true, never>;
}