import { ElementRef, OnChanges, SimpleChanges } from '@angular/core';
import { Subject } from 'rxjs';
import { Direction } from '../util/direction';
import * as i0 from "@angular/core";
export declare class DropdownMenuDirective implements OnChanges {
    readonly _elementRef: ElementRef<HTMLElement>;
    click: Subject<void>;
    private _innerDirection;
    show: boolean;
    direction: Direction | null;
    _click: (e: Event) => void;
    constructor(_elementRef: ElementRef<HTMLElement>);
    ngOnChanges(changes: SimpleChanges): void;
    setDirectionClass(direction: string): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<DropdownMenuDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<DropdownMenuDirective, "[uDropdownMenu]", never, { "direction": { "alias": "direction"; "required": false; }; }, {}, never, never, false, never>;
}