import { OnInit, ElementRef, EventEmitter } from '@angular/core';
/**
 * 环形占比图
 *
 * <example-url>https://stackblitz.com/edit/np-circle-bar-sample?embed=1&file=src/app/app.component.ts</example-url>
 */
export declare class NpCircleBar implements OnInit {
    canvasRef: ElementRef;
    /**百分比值0 ~ 1， 例如0.25，则占比1/4。 */
    value: number;
    /**环的直径 */
    size: number;
    /**环形占比开始的角度，例如0代表3点钟方向开始占比，π代表9点钟方向，2π转了一圈又到了3点钟方向开始，以此类推。 */
    startAngle: number;
    /**环的厚度 */
    thickness: string;
    /**环形占比渐变色gradient，例如：{ gradient: ['#3aeabb', '#fdd250'] } */
    fill: any;
    /**环形未占比填充颜色，例如：rgba(0, 0, 0, 0.1) */
    emptyFill: string;
    /**加载动画效果，例如：{ duration: 1200, easing: 'circleProgressEasing' }*/
    animation: object | boolean;
    /**加载动画初始值 */
    animationStartValue: number;
    /**加载动画是否逆时针 */
    reverse: boolean;
    /**环形图截面形状，butt | round | square，默认round即圆环截面 */
    lineCap: 'butt' | 'round' | 'square';
    insertMode: 'append' | 'prepend';
    circleInited: EventEmitter<{}>;
    circleAnimationStart: EventEmitter<{}>;
    circleAnimationProgress: EventEmitter<any>;
    circleAnimationEnd: EventEmitter<any>;
    el: any;
    canvas: HTMLCanvasElement;
    ctx: CanvasRenderingContext2D;
    radius: number;
    arcFill: any;
    lastFrameValue: number;
    constructor();
    ngOnInit(): void;
    init(): void;
    private initWidget;
    private initFill;
    private draw;
    private drawFrame;
    private drawArc;
    private drawEmptyArc;
    private drawAnimated;
    private getThickness;
    private getValue;
    setValue(newValue: number): void;
}