import { EventEmitter, Injector, OnDestroy, Renderer2, TemplateRef, ViewContainerRef } from '@angular/core';
import { Alignment, Placement } from '@bootkit/angular/common';
import { Overlay } from '@angular/cdk/overlay';
import * as i0 from "@angular/core";
/**
 * Directive to manage overlay behavior.
 */
export declare class OverlayDirective implements OnDestroy {
    readonly templateRef: TemplateRef<any>;
    private _overlayService;
    private _injector;
    private _renderer;
    private _viewRef;
    anchor: import("@angular/core").InputSignal<any>;
    open: import("@angular/core").ModelSignal<boolean>;
    placement: import("@angular/core").InputSignal<Placement>;
    alignment: import("@angular/core").InputSignal<Alignment>;
    /**
     * Event emitted when a pointer event occurs outside the overlay.
     */
    outsidePointerEvent: EventEmitter<MouseEvent>;
    private _overlayRef?;
    private _templatePortal;
    private _outsidePointerEventsSubscription?;
    private _hideTimeoutId;
    constructor(templateRef: TemplateRef<any>, _overlayService: Overlay, _injector: Injector, _renderer: Renderer2, _viewRef: ViewContainerRef);
    /**
     * Show the overlay.
     */
    show(): void;
    /**
     * Hide the overlay.
     */
    hide(): void;
    /**
     * Hide the overlay after a period of time.
     */
    hideAfter(ms: number): void;
    /**
     * Toggle the overlay visibility.
     */
    toggle(): void;
    private _clearTimeout;
    /**
     * Lifecycle hook that is called when the directive is destroyed.
     */
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<OverlayDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<OverlayDirective, "[bkOverlay]", ["bkOverlay"], { "anchor": { "alias": "anchor"; "required": true; "isSignal": true; }; "open": { "alias": "open"; "required": false; "isSignal": true; }; "placement": { "alias": "placement"; "required": false; "isSignal": true; }; "alignment": { "alias": "alignment"; "required": false; "isSignal": true; }; }, { "open": "openChange"; "outsidePointerEvent": "outsidePointerEvent"; }, never, never, true, never>;
}