import { AfterViewInit, ChangeDetectorRef, ElementRef, OnDestroy, QueryList } from '@angular/core';
import { PaFormControlDirective } from '../../form-field';
import { RadioComponent } from './radio.component';
import { NgControl } from '@angular/forms';
import * as i0 from "@angular/core";
export declare class RadioGroupDirective extends PaFormControlDirective implements AfterViewInit, OnDestroy {
    protected element: ElementRef;
    protected parentControl: NgControl;
    protected cdr: ChangeDetectorRef;
    noBackground: boolean;
    _radios?: QueryList<RadioComponent>;
    fieldType: string;
    private checkedRadio?;
    private initialSetDisabledState;
    radioCount: number;
    get alternateBackgrounds(): boolean;
    constructor(element: ElementRef, parentControl: NgControl, cdr: ChangeDetectorRef);
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    setDisabledState(value: boolean): void;
    writeValue(value: any): void;
    /**
     * Check if the radios are already in the DOM before running the callback.
     * If they are not, try every 200ms for 4s.
     *
     * @param callback
     * @private
     */
    private waitForRadios;
    static ɵfac: i0.ɵɵFactoryDeclaration<RadioGroupDirective, [null, { optional: true; self: true; }, null]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<RadioGroupDirective, "pa-radio-group", ["paRadioGroup"], { "noBackground": { "alias": "noBackground"; "required": false; }; }, {}, ["_radios"], never, false, never>;
    static ngAcceptInputType_noBackground: unknown;
}