import { AriaDescriber, FocusMonitor } from '@angular/cdk/a11y';
import { Directionality } from '@angular/cdk/bidi';
import { Overlay } from '@angular/cdk/overlay';
import { Platform } from '@angular/cdk/platform';
import { ScrollDispatcher } from '@angular/cdk/scrolling';
import { AfterViewInit, ElementRef, NgZone, OnDestroy, ViewContainerRef } from '@angular/core';
import { MatFormFieldControl } from '@angular/material/form-field';
import { MatTooltipDefaultOptions } from '@angular/material/tooltip';
import { UiMatFormFieldRequiredIntl } from './ui-matformfield-required.directive.intl';
import * as i0 from "@angular/core";
export declare class UiMatFormFieldRequiredDirective implements AfterViewInit, OnDestroy {
    private _overlay;
    private _elemRef;
    private _scrollDispatcher;
    private _viewContainerRef;
    private _ngZone;
    private _platform;
    private _ariaDescriber;
    private _focusMonitor;
    private _scrollStrategy;
    private _dir;
    private _defaultOptions;
    private _document;
    intl: UiMatFormFieldRequiredIntl;
    set matControl(matControl: MatFormFieldControl<any>);
    private _matControlSubscription?;
    private _tooltip?;
    private _labelElement?;
    private _destroyed$;
    constructor(_overlay: Overlay, _elemRef: ElementRef, _scrollDispatcher: ScrollDispatcher, _viewContainerRef: ViewContainerRef, _ngZone: NgZone, _platform: Platform, _ariaDescriber: AriaDescriber, _focusMonitor: FocusMonitor, _scrollStrategy: any, _dir: Directionality, _defaultOptions: MatTooltipDefaultOptions, _document: any, intl: UiMatFormFieldRequiredIntl);
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    private _updateDisableTooltipProperty;
    private _createMatTooltip;
    static ɵfac: i0.ɵɵFactoryDeclaration<UiMatFormFieldRequiredDirective, [null, null, null, null, null, null, null, null, null, { optional: true; }, { optional: true; }, null, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<UiMatFormFieldRequiredDirective, "mat-form-field", never, {}, {}, ["matControl"], never, false, never>;
}