import { OnInit, EventEmitter, TemplateRef, ViewContainerRef, NgZone, ChangeDetectorRef, ElementRef } from '@angular/core';
export declare class DropdownComponent implements OnInit {
    private vcr;
    private zone;
    private cdr;
    componentOrigin: ElementRef;
    options: [];
    placeholder: string;
    selectChange: EventEmitter<any>;
    closed: EventEmitter<{}>;
    disabled: boolean;
    readonly visibleOptions: 0 | 4;
    modelValue: any;
    modelChange: EventEmitter<any>;
    model: any;
    optionWidth: string;
    private view;
    private popperRef;
    constructor(vcr: ViewContainerRef, zone: NgZone, cdr: ChangeDetectorRef);
    readonly isOpen: boolean;
    ngOnInit(): void;
    onSelect(): void;
    open(dropdownTpl: TemplateRef<any>, origin: HTMLElement): void;
    close(): void;
    select(option: any): void;
    private handleClickOutside;
    isActive(option: any): boolean;
}