import { ElementRef, Renderer2, OnInit, AfterViewInit, OnChanges, SimpleChanges, OnDestroy } from '@angular/core';
import { Subscription } from 'rxjs';
import { ParallaxDirection } from './ngx-parallax.interfaces';
export declare class ParallaxScrollDirective implements OnInit, OnChanges, AfterViewInit, OnDestroy {
    elem: ElementRef;
    renderer: Renderer2;
    private platformId;
    private config?;
    parallaxSpeed: number;
    parallaxSmoothness: number;
    parallaxDirection?: ParallaxDirection;
    parallaxTimingFunction?: string;
    parallaxThrottleTime?: number;
    private _parallaxSpeedVal;
    private _parallaxSmoothnessVal;
    private _parallaxTimingFunVal;
    private _parallaxThrottleTime;
    scrollSubscribtion: Subscription;
    isPrxElInViewport: boolean;
    directiveName: string;
    constructor(elem: ElementRef, renderer: Renderer2, platformId: Object);
    ngOnInit(): void;
    ngOnChanges(changes: SimpleChanges): void;
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    initParallax(): void;
    setParallaxElTransform(): void;
    setParallaxTransition(): void;
    setParallaxSpeed(speedVal: any): void;
    setParallaxSmoothness(smoothnessVal: any): void;
    setParallaxDirection(directionVal: any): void;
    setParallaxTimingFun(timingFun: any): void;
    setParallaxThrottleTime(throttleTime: any): void;
    readonly prlxSpeed: number;
    readonly prlxSmoothness: number;
    readonly prlxTimingFun: string;
    readonly prlxThrottleTime: number;
    isProvided(value: any, propName: string): boolean;
    isTypeOf(value: any, requiredType: 'string' | 'number' | 'boolean', propName: string): boolean;
    isPositive(value: number, propName: string): boolean;
    validateParallaxSpeed(value: any, propName: string, requiredType: 'string' | 'number' | 'boolean'): boolean;
    validateParallaxSmoothness(value: any, propName: string, requiredType: 'string' | 'number' | 'boolean'): boolean;
}