import { OnChanges, OnDestroy, SimpleChanges } from '@angular/core';
import { DateAdapter } from '@angular/material/core';
import { JDNConvertibleCalendar } from 'jdnconvertiblecalendar';
import { BehaviorSubject } from 'rxjs';
export declare function makeCalendarToken(): BehaviorSubject<string>;
export declare class JDNDatepickerDirective implements OnChanges, OnDestroy {
    private _activeCalendarToken;
    private _adapter;
    private _activeCalendar;
    set activeCalendar(value: 'Gregorian' | 'Julian' | 'Islamic' | null);
    get activeCalendar(): 'Gregorian' | 'Julian' | 'Islamic' | null;
    constructor(_activeCalendarToken: any, _adapter: DateAdapter<JDNConvertibleCalendar>);
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
}