import { OnDestroy, ElementRef, SimpleChanges, OnChanges } from '@angular/core';
import * as i0 from "@angular/core";
export declare class NumberTickerComponent implements OnChanges, OnDestroy {
    private elementRef;
    /** 要显示的数字 */
    ncValue: number;
    /** 起始数值 */
    ncStartValue: number;
    /** 开始前的延迟 */
    ncDelay: number;
    /** 小数位数 */
    ncDecimalPlaces: number;
    /** 动画持续时间（毫秒） */
    ncDuration: number;
    /** 是否在视图可见时才开始动画 */
    private _startOnView;
    set ncStartOnView(val: boolean | string);
    get ncStartOnView(): boolean;
    /** 是否只执行一次动画 */
    private _once;
    set ncOnce(val: boolean | string);
    get ncOnce(): boolean;
    private observer;
    private animationFrame;
    private timeout;
    currentValue: number;
    displayValue: string;
    constructor(elementRef: ElementRef);
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
    private start;
    private clear;
    private setupIntersectionObserver;
    private startAnimation;
    private resetAnimation;
    private animate;
    private updateDisplayValue;
    static ɵfac: i0.ɵɵFactoryDeclaration<NumberTickerComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<NumberTickerComponent, "nc-number-ticker", never, { "ncValue": "ncValue"; "ncStartValue": "ncStartValue"; "ncDelay": "ncDelay"; "ncDecimalPlaces": "ncDecimalPlaces"; "ncDuration": "ncDuration"; "ncStartOnView": "ncStartOnView"; "ncOnce": "ncOnce"; }, {}, never, never>;
}