会议预定记录钟表盘展示功能怎么实现？

墨轩

发布于
2023-11-08 上海

更新于
2023-11-08

新手上路，请多包涵

类似于图片这种效果，总共24个刻度。
某个时间段有会议，则显示图片中橙色部分的样式。
每场会议以30分钟为基本单位。
请各位大佬指教

前端 vue.js

阅读 1.3k

4 个回答

得票最新

3.8k1623

发布于
2023-11-09 江西

更新于
2023-11-09

✓ 已被采纳

用 svg，path 绘制圆弧：

import { Fragment } from "react";
import "./assets/app.scss";

const a = (n: number) => Array.from({ length: n });

export default function App() {
  const r = 190,
    d = new Date(),
    x = (rad: number) => 250 + Math.sin(2 * Math.PI * rad) * r,
    y = (rad: number) => 250 - Math.cos(2 * Math.PI * rad) * r,
    times: [[number, number?], [number, number?]][] = [
      [[8], [10]],
      [[10], [11, 10]],
      [[14], [15, 10]],
      [[17], [19]],
    ];

  return (
    <svg width="500" height="500">
      <circle id="main-circle" cx="250" cy="250" r={r} />

      {times.map((t, i) => {
        const w = 25,
          d = w / 2 / (2 * Math.PI * r);
        let [r1, r2] = t.map(
          ([a, b]: [number, number?]) => a / 24 + (b ?? 0) / (60 * 24)
        );
        r1 += d;
        r2 -= d;
        return (
          <path
            key={i}
            className="arc"
            stroke="orange"
            strokeWidth={w}
            fill="transparent"
            strokeLinecap="round"
            d={`M ${x(r1)} ${y(r1)} A ${r} ${r} 0 0 1 ${x(r2)} ${y(r2)}`}
          />
        );
      })}

      {a(8).map((_, i) => (
        <text key={i} className="num" x={x(i / 8)} y={y(i / 8)}>
          {i * 3}
        </text>
      ))}

      {a(24).map((_, i) =>
        i % 3 ? (
          <circle key={i} r="3" fill="white" cx={x(i / 24)} cy={y(i / 24)} />
        ) : (
          <Fragment key={i} />
        )
      )}

      <text id="t" x="250" y="300">
        {d.toLocaleTimeString(undefined, {
          hour: "2-digit",
          minute: "2-digit",
        })}
      </text>

      <text id="d" x="250" y="330">
        {d.toLocaleDateString()}
      </text>
    </svg>
  );
}

#root {
  svg {
    background: #6a6a6a;

    #main-circle {
      stroke: #888888;
      fill: transparent;
      stroke-width: 25px;
    }

    .num,
    #d,
    #t {
      fill: white;
      font-family: sans-serif;
      text-anchor: middle;
      alignment-baseline: middle;
      // translate: -50% -50%;
      // font-size: 10px;
    }

    #t {
      font-size: 40px;
    }
    #d {
      font-size: 30px;
    }
  }
}

汝何不上九霄

4.6k51743

发布于
2023-11-08 北京

使用Canvas可以实现该表盘,做个固定的背景图就行了,我给你个demo
你改 ctx.arc(200, 200, 170, convertNum(0), convertNum(3)); 后面两个参数就能实现几点到几点了


<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <style>
    body {
      background-color: gray;
    }
    h1 {
      font-family: helvetica;
      font-size: 2.5rem;
      color: black;
      position: relative;
      top: 80px;
      z-index: -1;
    }
    #canvas {
      display: block;
      margin: 5vh auto;
      border-radius: 50%;
      box-shadow: 0 5px 14px black;
    }
  </style>
  <body>
    <canvas id="canvas" width="400" height="400"></canvas>
  </body>
  <script>
    var canvas = document.getElementById("canvas");
    var ctx = canvas.getContext("2d");
    ctx.strokeStyle = "#e44b24";

    ctx.lineWidth = 17;
    ctx.lineCap = "round";
    // ctx.shadowBlur = 15;
    // ctx.shadowColor = '#28d1fa';

    function degToRad(degree) {
      var factor = Math.PI / 180;
      return degree * factor;
    }

    // 转换数值 360度转换成24份,并修正从0点开始
    function convertNum(num) {
      return degToRad(num * 15 - 90);
    }
    function draw() {
      var now = new Date();
      var today = now.toDateString();
      var time = now.toLocaleTimeString();
      var hours = now.getHours();
      var minutes = now.getMinutes();
      var seconds = now.getSeconds();
      var milliseconds = now.getMilliseconds();
      var newSeconds = seconds + milliseconds / 1000;

      // Background
      gradient = ctx.createRadialGradient(200, 200, 5, 200, 200, 300);
      ctx.fillStyle = gradient;
      ctx.fillRect(0, 0, 400, 400);

      // 0点到3点
      ctx.beginPath();
      ctx.arc(200, 200, 170, convertNum(0), convertNum(3));
      ctx.stroke();

      // 7到8
      ctx.beginPath();
      ctx.arc(200, 200, 170, convertNum(7), convertNum(8));
      ctx.stroke();

      // 14-16
      ctx.beginPath();
      ctx.arc(200, 200, 170, convertNum(14), convertNum(16));
      ctx.stroke();
    }
    draw();
  </script>
</html>