import { ChangeDetectorRef, ElementRef, OnDestroy, OnInit, Renderer2, ViewContainerRef } from '@angular/core';
import { DropdownMenuComponent } from './dropdown-menu.component';
import { Overlay } from '@angular/cdk/overlay';
import { Subject } from 'rxjs';
declare type voidFunc = () => void;
export declare class DropdownTriggerDirective implements OnInit, OnDestroy {
    private viewContainerRef;
    private overlay;
    private elementRef;
    private renderer;
    private cdr;
    private overlayRef;
    dropdownMenu: DropdownMenuComponent;
    position: 'left' | 'right';
    activeClass: string;
    disabled: boolean;
    subscriptions: voidFunc[];
    isVisible: boolean;
    isVisible$: Subject<boolean>;
    constructor(viewContainerRef: ViewContainerRef, overlay: Overlay, elementRef: ElementRef, renderer: Renderer2, cdr: ChangeDetectorRef);
    ngOnInit(): void;
    ngOnDestroy(): void;
    onClick($event: any): void;
    showMenu(): void;
    hideMenu(): void;
    getPositionStrategy(): import("@angular/cdk/overlay").FlexibleConnectedPositionStrategy;
    private syncWidth;
}
export {};