import { ScreenBounds } from "../common/screen-bounds";
import { ScreenXY } from "../common/screen-xy";
import { LineSymbol } from "./symbol";
/**
 * 箭头符号
 */
export declare class ArrowSymbol extends LineSymbol {
    /**
     * 线宽
     */
    lineWidth: number;
    /**
     * 决定绘制箭头的最小线长
     * @remarks 屏幕坐标，单位pixel
     * 默认 >50pixels will draw arrow
     */
    minLength: number;
    /**
     * 箭翼长度
     */
    arrowLength: number;
    /**
     * 箭翼夹角
     * @remarks 默认 angle 30 = Math.PI / 6
     */
    arrowAngle: number;
    /**
     * 绘制线
     * @param {CanvasRenderingContext2D} ctx - 绘图上下文
     * @param {ScreenXY[]} screenXYs - 线对应坐标点的屏幕坐标集合
     */
    draw(ctx: CanvasRenderingContext2D, screenXYs: ScreenXY[]): void;
    /**
     * 获取包络矩形
     * @param {ScreenXY[]} screenXYs - 线对应坐标点的屏幕坐标集合
     */
    getScreenBounds(screenXYs: ScreenXY[]): ScreenBounds;
}