@jianghh/canvas-graffiti/es/tools/Arc.js

canvas涂鸦库，支持手写、笔写、鼠标，选中元素，并且移动、删除等功能。集成撤销重做操作。

import { GraffitiEle as f } from "../element/index.js";
import { roundToNDecimalPlaces as o } from "../utils/index.js";
const a = {
  buffer: !0,
  pointerdown({ offsetX: t, offsetY: i }) {
    this.bufferCtx.moveTo(t, i), this.points.push({ x: o(t), y: o(i) });
  },
  pointermove({ offsetX: t, offsetY: i }) {
    this.bufferCtx.clearRect(0, 0, this.el.width, this.el.height), this.bufferCtx.beginPath(), this.bufferCtx.arc(this.beginPoint.x, this.beginPoint.y, Math.abs(t - this.beginPoint.x), 0, 2 * Math.PI), this.endPoint = { x: t, y: i }, this.bufferCtx.stroke();
  },
  pointerup() {
    if (this.endPoint) {
      this.points.push({ x: o(this.endPoint.x), y: o(this.endPoint.y) }), this.ctx.beginPath();
      const t = this.points[0], i = this.points[1], s = Math.abs(i.x - t.x);
      this.ctx.arc(t.x, t.y, s, 0, 2 * Math.PI), this.ctx.stroke();
      const e = t.x < i.x ? t.x - s : i.x, h = t.y - s, n = t.x < i.x ? i.x : t.x + s, r = t.y + s;
      this.graffitiEleList.push(
        new f({
          tool: "Arc",
          left: e,
          top: h,
          right: n,
          bottom: r,
          points: this.points,
          shadowColor: this.shadowColor,
          lineWidth: this.lineWidth,
          shadowBlur: this.shadowBlur,
          strokeStyle: this.strokeStyle,
          fillStyle: this.fillStyle
        })
      );
    }
  },
  drawEle(t) {
    let i = t[0], s = t[1];
    this.ctx.beginPath(), this.ctx.arc(i.x, i.y, Math.abs(s.x - i.x), 0, 2 * Math.PI), this.ctx.stroke();
  }
};
export {
  a as Arc
};