import { ApplicationRef, EmbeddedViewRef, NgZone, TemplateRef } from '@angular/core';
import { Observable } from 'rxjs';
import { Popper } from '../services/popper';
import { PopperOptions } from '../services/popper';
export declare class DatoOverlay {
    private appRef;
    private ngZone;
    private popper;
    attached: boolean;
    created: boolean;
    private appendTo;
    private ignoreClick;
    private overlay;
    private popperInstance;
    private onClickSubscription;
    private onResizeSubscription;
    private backDropClick;
    private origin;
    private tplPortal;
    constructor(appRef: ApplicationRef, ngZone: NgZone, popper: Popper);
    create(origin: HTMLElement, tplPortal: DatoTemplatePortal, appendToElement?: HTMLElement): void;
    /**
     *
     * @param {Partial<PopperOptions>} options
     */
    attach(options: Partial<PopperOptions>, classes?: string[]): void;
    /**
     * Reposition the overlay
     */
    scheduleUpdate(): void;
    /**
     *
     * @returns {Observable<any>}
     */
    get backDropClick$(): Observable<unknown>;
    /**
     *
     * @param {MouseEvent} event
     */
    private handleClick;
    /**
     *
     * @param {HTMLElement} origin
     */
    private handleResize;
    /**
     *
     * @returns {HTMLElement}
     */
    private createOverlay;
    /**
     *
     * @param {HTMLElement} target
     * @param {Partial<PopperOptions>} options
     */
    private createPopper;
    /**
     * Call this method when you close the dropdown
     */
    detach(): void;
    /**
     * Call this method on `ngOnDestroy` of the component
     */
    destroy(): void;
}
export declare class DatoTemplatePortal {
    viewRef: EmbeddedViewRef<any>;
    constructor(tpl: TemplateRef<any>);
    /**
     *
     * @returns {HTMLElement}
     */
    get elementRef(): HTMLElement;
    /**
     * Destroy the viewRef
     */
    destroy(): void;
}