import { AfterViewInit, NgZone, OnDestroy } from '@angular/core';
import * as i0 from "@angular/core";
export declare class ShowOnlyAtTopDirective implements AfterViewInit, OnDestroy {
    private zone;
    private platformId;
    /** Rango en px desde el top en el que el botón permanece visible */
    topShowPx: number;
    minWidth: number;
    private hidden;
    private active;
    private offScroll?;
    private offResize?;
    private ticking;
    t: string;
    get cls(): boolean;
    get op(): "1" | "0";
    get pe(): "auto" | "none";
    constructor(zone: NgZone, platformId: object);
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<ShowOnlyAtTopDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<ShowOnlyAtTopDirective, "[showOnlyAtTop]", never, { "topShowPx": { "alias": "topShowPx"; "required": false; }; "minWidth": { "alias": "minWidth"; "required": false; }; }, {}, never, never, true, never>;
}