import { ElementRef, OnInit, Renderer2 } from '@angular/core';
import { Subscription } from 'rxjs';
import { AnimationBuilder, AnimationPlayer } from '@angular/animations';
import { WindowRef } from '@duoduo-oba/ng-devui/window-ref';
import { DropDownDirective } from './dropdown.directive';
export declare class DropDownMenuDirective implements OnInit {
    private dropdown;
    private el;
    private render;
    private windowRef;
    private builder;
    player: AnimationPlayer;
    diplay: string;
    tabIndex: number;
    addClass: boolean;
    keydownEscapeEvent$: import("rxjs").Observable<Event>;
    keydownEscapeSub: Subscription;
    popDirectionCache: 'top' | 'bottom';
    private currentValue;
    constructor(dropdown: DropDownDirective, el: ElementRef, render: Renderer2, windowRef: WindowRef, builder: AnimationBuilder);
    ngOnInit(): void;
    calcPopDirection(value: any): "top" | "bottom";
    mouseLeave(event: MouseEvent): boolean;
    private fadeIn;
    hide: (event: Event) => void;
    private fadeOut;
}