import { ElementRef, OnChanges, OnDestroy, OnInit, Renderer2, SimpleChanges } from '@angular/core';
import { ITriCheckboxRegister, ITriStateCheckboxControl } from './tri-state-checkbox.types';
import { CheckboxControlValueAccessor } from '@angular/forms';
export declare class NgTriStateControlDirective extends CheckboxControlValueAccessor implements OnInit, OnDestroy, OnChanges, ITriStateCheckboxControl {
    protected renderer: Renderer2;
    protected elementRef: ElementRef;
    checkedValue: any;
    isDisabled: boolean;
    value: any;
    registry: ITriCheckboxRegister;
    constructor(renderer: Renderer2, elementRef: ElementRef);
    ngOnInit(): void;
    ngOnDestroy(): void;
    ngOnChanges(changes: SimpleChanges): void;
    readValue(): any;
    writeValue(value: any): void;
    setDisabled(state: boolean): void;
    private updateValueOnRegistry;
    onChangeValue(value: any): void;
}