import { ElementRef, OnDestroy } from '@angular/core';
import { ClrCommonStringsService } from '../../utils/i18n/common-strings.service';
import { ClrPopoverToggleService } from '../../utils/popover/providers/popover-toggle.service';
import { SignpostFocusManager } from './providers/signpost-focus-manager.service';
import { SignpostIdService } from './providers/signpost-id.service';
import * as i0 from "@angular/core";
export declare class ClrSignpostTrigger implements OnDestroy {
    private toggleService;
    private el;
    commonStrings: ClrCommonStringsService;
    private signpostIdService;
    private signpostFocusManager;
    private platformId;
    ariaExpanded: boolean;
    ariaControl: string;
    isOpen: boolean;
    private document;
    private subscriptions;
    constructor(toggleService: ClrPopoverToggleService, el: ElementRef, commonStrings: ClrCommonStringsService, signpostIdService: SignpostIdService, signpostFocusManager: SignpostFocusManager, document: any, platformId: any);
    ngOnInit(): void;
    ngOnDestroy(): void;
    /**********
     *
     * @description
     * click handler for the ClrSignpost trigger button used to hide/show ClrSignpostContent.
     */
    onSignpostTriggerClick(event: Event): void;
    private addDefaultAriaLabel;
    private focusOnClose;
    static ɵfac: i0.ɵɵFactoryDeclaration<ClrSignpostTrigger, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<ClrSignpostTrigger, "[clrSignpostTrigger]", never, {}, {}, never, never, false, never>;
}