import { FocusKeyManager } from '@angular/cdk/a11y';
import { AfterContentInit, ElementRef, OnDestroy, QueryList } from '@angular/core';
import { TabbableListItemDirective } from './tabbable-list-item.directive';
import * as i0 from "@angular/core";
export declare class TabbableListDirective implements AfterContentInit, OnDestroy {
    /** Access the tabbable list service */
    private readonly _tabbableList;
    /** Access the native dom element */
    readonly elementRef: ElementRef<any>;
    /** Determine whether the up/down arrows should be used or the left/right arrows */
    direction: 'horizontal' | 'vertical';
    /** Indicate whether or not focus should loop back to the first element after the last */
    wrap: boolean;
    /** Indicate whether or not the first item should receive focus on show - useful for modals and popovers */
    focusOnShow: boolean;
    /** Indicate whether or not focus should be returned to the previous element (only applicable when using focusOnShow) */
    returnFocus: boolean;
    /** Enabling handling of hierarchical lists via use of the `TabbableListItemDirective.parent` property. */
    set hierarchy(value: boolean);
    /** Prevent keyboard interaction when alt modifier key is pressed */
    set allowAltModifier(value: boolean);
    /** Prevent keyboard interaction when ctrl modifier key is pressed */
    set allowCtrlModifier(value: boolean);
    /** Focus the first or last item when Home or End keys are pressed */
    set allowBoundaryKeys(value: boolean);
    /** Find all tabbable list items */
    items: QueryList<TabbableListItemDirective>;
    /** Store the currently focused HTML element */
    private _focusedElement;
    /** Store the items in a specific order */
    private _orderedItems;
    /** Unsubscribe from all observables automatically on destroy */
    private readonly _onDestroy;
    get focusKeyManager(): FocusKeyManager<TabbableListItemDirective>;
    constructor();
    ngAfterContentInit(): void;
    ngOnDestroy(): void;
    setFirstItemTabbable(): void;
    focus(): void;
    focusTabbableItem(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<TabbableListDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<TabbableListDirective, "[uxTabbableList]", ["ux-tabbable-list"], { "direction": { "alias": "direction"; "required": false; }; "wrap": { "alias": "wrap"; "required": false; }; "focusOnShow": { "alias": "focusOnShow"; "required": false; }; "returnFocus": { "alias": "returnFocus"; "required": false; }; "hierarchy": { "alias": "hierarchy"; "required": false; }; "allowAltModifier": { "alias": "allowAltModifier"; "required": false; }; "allowCtrlModifier": { "alias": "allowCtrlModifier"; "required": false; }; "allowBoundaryKeys": { "alias": "allowBoundaryKeys"; "required": false; }; }, {}, ["items"], never, false, never>;
}