import { Overlay } from '@angular/cdk/overlay';
import { ElementRef, NgZone, OnChanges, OnInit, SimpleChanges } from '@angular/core';
import { ControlContainer, FormControl, NgControl, NgForm } from '@angular/forms';
import { NcTooltipDirective } from '../tooltip';
import { NcErrorsComponent } from './error-messages';
import * as i0 from "@angular/core";
export declare class NcErrorTooltipDirective extends NcTooltipDirective implements OnInit, OnChanges {
    private implicitNgControl?;
    private ngForm?;
    private controlContainer?;
    private inFocus;
    private formSubmitted;
    private contentInstance;
    private _errorMessages;
    private errorMessagesSub;
    hasError: boolean;
    readonly errorMessageId: string;
    errorMessages: NcErrorsComponent | string;
    explicitNgControl?: NgControl | FormControl;
    customErrors?: {
        [key: string]: any;
    } | null;
    constructor(elRef: ElementRef<HTMLElement>, overlay: Overlay, ngZone: NgZone, implicitNgControl?: NgControl, ngForm?: NgForm, controlContainer?: ControlContainer);
    ngOnInit(): void;
    ngDoCheck(): void;
    ngOnChanges(changes: SimpleChanges): void;
    onFocus(): void;
    onBlur(): void;
    hide(): void;
    private get ngControl();
    private get formContainer();
    private checkTooltipState;
    private createContentInstance;
    private updateErrorMessages;
    private getErrors;
    static ɵfac: i0.ɵɵFactoryDeclaration<NcErrorTooltipDirective, [null, null, null, { optional: true; }, { optional: true; }, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<NcErrorTooltipDirective, "[ncErrorTooltip]", ["ncErrorTooltip"], { "errorMessages": "ncErrorTooltip"; "explicitNgControl": "ncErrorTooltipControl"; "customErrors": "ncErrorTooltipCustom"; }, {}, never>;
}