import { ElementRef, QueryList } from '@angular/core';
import { Observable } from 'rxjs';
export declare class DatePickerNavigationHelper {
    private _currentFocusedElement;
    private _daysButtonsElemRef;
    private _hostId;
    private _displayNextMonth;
    private _displayPreviousMonth;
    get displayNextMonth(): Observable<void>;
    get displayPreviousMonth(): Observable<void>;
    set currentFocusedElement(elem: Element);
    set daysButtonsElemRef(elems: QueryList<ElementRef>);
    set hostId(id: string);
    private static convertElementToFocusedDay;
    private static focusPreviousMonthButton;
    private static focusNextMonthButton;
    focusDefaultDay(hasSelectedDay: boolean): void;
    focusNextDay(): void;
    focusPreviousDay(): void;
    focusNextWeekDay(): void;
    focusPreviousWeekDay(): void;
    private getEnabledDaysOfWeek;
    private getAllDaysInColumn;
    private getEnabledDaysInColumn;
    private getCurrentFocusedIndex;
}