import { OnInit, OnDestroy, AfterViewInit } from '@angular/core';
import * as i0 from "@angular/core";
export declare class ClassChangeOnScrollDirective implements OnInit, OnDestroy, AfterViewInit {
    wsClassOnScrollDirChange: number;
    get isScrollingDown(): boolean;
    get isScrollingUp(): boolean;
    get isNotScrolling(): boolean;
    hasScrolledDown: boolean;
    private windowScrollSubscription;
    private timeoutTimer;
    private lastScreenTop;
    private currState;
    constructor();
    ngOnInit(): void;
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    private setScrollState;
    private resetScrollingState;
    static ɵfac: i0.ɵɵFactoryDeclaration<ClassChangeOnScrollDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<ClassChangeOnScrollDirective, "[wsUtilsClassChangeOnScroll]", never, { "wsClassOnScrollDirChange": { "alias": "wsClassOnScrollDirChange"; "required": false; }; }, {}, never, never, false, never>;
}