import { OnDestroy, OnInit, TemplateRef, ViewContainerRef } from "@angular/core";
import { Subscription } from "rxjs";
import { DropdownDirective } from "./dropdown.directive";
import * as i0 from "@angular/core";
export declare class DropdownContentDirective implements OnInit, OnDestroy {
    protected vcr: ViewContainerRef;
    protected rootElem: HTMLElement;
    protected dropdown: DropdownDirective;
    readonly templateRef: TemplateRef<any>;
    protected subscription: Subscription;
    protected attachTo: HTMLElement;
    protected attachOutside: boolean;
    protected lastPlacement: string;
    protected cleanUp: () => void;
    constructor(vcr: ViewContainerRef, rootElem: HTMLElement, dropdown: DropdownDirective, templateRef: TemplateRef<any>);
    ngOnInit(): void;
    ngOnDestroy(): void;
    protected createView(init?: boolean): void;
    protected destroyView(): void;
    protected whereToAttach(): HTMLElement;
    protected createWrapper(): HTMLDivElement[];
    initialize(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<DropdownContentDirective, [null, { optional: true; }, { optional: true; }, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<DropdownContentDirective, "[dropdownContent]", ["dropdown-content"], {}, {}, never, never, false, never>;
}