import { FormBuilder, FormControl, FormGroup } from '@angular/forms';
import { JDNConvertibleCalendar } from 'jdnconvertiblecalendar';
import { MatCalendar, MatDatepickerContent } from '@angular/material/datepicker';
import { DateAdapter } from '@angular/material/core';
import { OnDestroy, OnInit } from '@angular/core';
import { Subscription } from 'rxjs';
export declare class CalendarHeaderComponent<D> implements OnInit, OnDestroy {
    private _calendar;
    private _dateAdapter;
    private _datepickerContent;
    private _fb;
    constructor(_calendar: MatCalendar<JDNConvertibleCalendar>, _dateAdapter: DateAdapter<JDNConvertibleCalendar>, _datepickerContent: MatDatepickerContent<JDNConvertibleCalendar>, _fb: FormBuilder);
    form: FormGroup;
    formControl: FormControl;
    valueChangesSubscription: Subscription;
    supportedCalendars: string[];
    ngOnInit(): void;
    ngOnDestroy(): void;
    /**
     * Converts the date into the target format.
     *
     * @param calendar the target calendar format.
     */
    convertDate(calendar: 'Gregorian' | 'Julian'): void;
}