import { Overlay, ScrollDispatcher, ViewportRuler } from '@angular/cdk/overlay';
import { ElementRef, EventEmitter, NgZone, ViewContainerRef } from '@angular/core';
import { Subscription } from 'rxjs';
import { MtnaPopoverConfig } from './popover-config.model';
import { MtnaPopoverComponent } from './popover.component';
import * as i0 from "@angular/core";
/**
 * Directive that attaches an MTNA designed popover to the host element. Used mostly for short
 * descriptions or definitions.
 *
 * @author Nick Richards <nick.richards@mtna.us>
 */
export declare class MtnaPopoverDirective {
    private elementRef;
    private ngZone;
    private overlay;
    private scrollDispatcher;
    private viewContainerRef;
    private viewportRuler;
    static ngAcceptInputType_ariaLabel: string | null | undefined;
    get config(): MtnaPopoverConfig | null | undefined;
    set config(config: MtnaPopoverConfig | null | undefined);
    private _config;
    /** Sets aria-label on the popover. Defaults to 'Open information'. */
    get openAriaLabel(): string;
    set openAriaLabel(openAriaLabel: string);
    private _openAriaLabel;
    get closeAriaLabel(): string;
    set closeAriaLabel(closeAriaLabel: string);
    private _closeAriaLabel;
    /** Emitted when the popover is closed. */
    closedPopover: EventEmitter<any>;
    /** the popover component reference */
    _popoverInstance: MtnaPopoverComponent | null | undefined;
    /** Overlay reference for the popover */
    private overlayRef;
    private _popoverId;
    subscription: Subscription | undefined;
    constructor(elementRef: ElementRef, ngZone: NgZone, overlay: Overlay, scrollDispatcher: ScrollDispatcher, viewContainerRef: ViewContainerRef, viewportRuler: ViewportRuler);
    /**
     * Closes the popover.
     */
    closePopover(): void;
    /**
     * Creates the overlay for the popover and sets up the scroll reposition strategy.
     */
    private createOverlay;
    /**
     *  Called when the popover will be displayed. Listens for the popoverComponent's
     * event emitter when component is closed and then emits a closedPopover event.
     */
    private loadComponent;
    private setPositionStrategy;
    /**
     * Called to show the popover.
     */
    showPopover(event: Event): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<MtnaPopoverDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<MtnaPopoverDirective, "[mtnaPopover]", ["mtnaPopover"], { "config": "mtnaPopover"; "openAriaLabel": "mtnaOpenPopoverAriaLabel"; "closeAriaLabel": "mtnaClosePopoverAriaLabel"; }, { "closedPopover": "closedPopover"; }, never>;
}