import { ElementRef, OnDestroy, ViewContainerRef } from '@angular/core';
import { DropdownPanel } from './dropdown-panel';
import { Overlay } from '@angular/cdk/overlay';
import * as i0 from "@angular/core";
export declare class DropdownTriggerForDirective implements OnDestroy {
    private overlay;
    private elementRef;
    private viewContainerRef;
    private isDropdownOpen;
    private overlayRef;
    private dropdownClosingActionsSub;
    dropdownPanel: DropdownPanel;
    dropdownAlignment: string;
    constructor(overlay: Overlay, elementRef: ElementRef<HTMLElement>, viewContainerRef: ViewContainerRef);
    toggleDropdown(): void;
    openDropdown(): void;
    private dropdownClosingActions;
    private destroyDropdown;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<DropdownTriggerForDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<DropdownTriggerForDirective, "[dropdownTriggerFor]", never, { "dropdownPanel": "dropdownTriggerFor"; "dropdownAlignment": "dropdownAlignment"; }, {}, never>;
}