import { Overlay, OverlayRef } from '@angular/cdk/overlay';
import { TemplatePortalDirective } from '@angular/cdk/portal';
import { EventEmitter, Injector, OnDestroy } from '@angular/core';
import { LegoBaseComponent, Parent } from '../../lego-base.component';
export declare class DropdownComponent extends LegoBaseComponent implements OnDestroy {
    protected injector: Injector;
    protected overlay: Overlay;
    reference: HTMLElement;
    minWidth: number;
    maxWidth: number;
    syncWidth: boolean;
    cssClasses: string;
    visible: EventEmitter<this>;
    hidden: EventEmitter<this>;
    contentTemplate: TemplatePortalDirective;
    private overlayRef;
    private viewRef;
    showing: boolean;
    constructor(injector: Injector, overlay: Overlay, parent: Parent);
    show(): void;
    hide(): void;
    onWinResize(): void;
    getOverlayRef(): OverlayRef;
    ngOnDestroy(): void;
    private setWidth;
    private getOverlayConfig;
}