import { EventEmitter, OnChanges, OnDestroy, OnInit, SimpleChanges } from '@angular/core';
import { FormBuilder, FormGroup, FormControl, AbstractControl } from '@angular/forms';
import { ReplaySubject } from 'rxjs';
import * as moment from 'moment-timezone';
import { CountdownTimerDateTime } from '../../../models/countdown-timer';
export declare class EventDatetimeComponent implements OnInit, OnChanges, OnDestroy {
    private _fb;
    data: CountdownTimerDateTime;
    handleSubmit: EventEmitter<{}>;
    handleFormValid: EventEmitter<{}>;
    frm: FormGroup;
    timezones: any;
    tzFilterCtrl: FormControl;
    filteredTimezones: ReplaySubject<moment.MomentZone[]>;
    private _destroy$;
    constructor(_fb: FormBuilder);
    ngOnChanges(changes: SimpleChanges): void;
    ngOnInit(): void;
    ngOnDestroy(): void;
    readonly f: {
        [key: string]: AbstractControl;
    };
    getErrorMessage(control: AbstractControl): "" | "This field is required." | "Invalid field";
    private _createForm;
    private _formMapping;
    private _subscriptions;
    private _onUpdateFormValid;
    private _onSubmit;
    private _composeData;
    protected _filterTimZones(): void;
}