初始化 antd-pro

admin-web/src/components/Charts/WaterWave/index.d.ts

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+import * as React from 'react';
+export interface IWaterWaveProps {
+  title: React.ReactNode;
+  color?: string;
+  height: number;
+  percent: number;
+  style?: React.CSSProperties;
+}
+
+export default class WaterWave extends React.Component<IWaterWaveProps, any> {}

admin-web/src/components/Charts/WaterWave/index.js

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+import React, { PureComponent } from 'react';
+import autoHeight from '../autoHeight';
+import styles from './index.less';
+
+/* eslint no-return-assign: 0 */
+/* eslint no-mixed-operators: 0 */
+// riddle: https://riddle.alibaba-inc.com/riddles/2d9a4b90
+
+@autoHeight()
+class WaterWave extends PureComponent {
+  state = {
+    radio: 1,
+  };
+
+  componentDidMount() {
+    this.renderChart();
+    this.resize();
+    window.addEventListener(
+      'resize',
+      () => {
+        requestAnimationFrame(() => this.resize());
+      },
+      { passive: true }
+    );
+  }
+
+  componentDidUpdate(props) {
+    const { percent } = this.props;
+    if (props.percent !== percent) {
+      // 不加这个会造成绘制缓慢
+      this.renderChart('update');
+    }
+  }
+
+  componentWillUnmount() {
+    cancelAnimationFrame(this.timer);
+    if (this.node) {
+      this.node.innerHTML = '';
+    }
+    window.removeEventListener('resize', this.resize);
+  }
+
+  resize = () => {
+    if (this.root) {
+      const { height } = this.props;
+      const { offsetWidth } = this.root.parentNode;
+      this.setState({
+        radio: offsetWidth < height ? offsetWidth / height : 1,
+      });
+    }
+  };
+
+  renderChart(type) {
+    const { percent, color = '#1890FF' } = this.props;
+    const data = percent / 100;
+    const self = this;
+    cancelAnimationFrame(this.timer);
+
+    if (!this.node || (data !== 0 && !data)) {
+      return;
+    }
+
+    const canvas = this.node;
+    const ctx = canvas.getContext('2d');
+    const canvasWidth = canvas.width;
+    const canvasHeight = canvas.height;
+    const radius = canvasWidth / 2;
+    const lineWidth = 2;
+    const cR = radius - lineWidth;
+
+    ctx.beginPath();
+    ctx.lineWidth = lineWidth * 2;
+
+    const axisLength = canvasWidth - lineWidth;
+    const unit = axisLength / 8;
+    const range = 0.2; // 振幅
+    let currRange = range;
+    const xOffset = lineWidth;
+    let sp = 0; // 周期偏移量
+    let currData = 0;
+    const waveupsp = 0.005; // 水波上涨速度
+
+    let arcStack = [];
+    const bR = radius - lineWidth;
+    const circleOffset = -(Math.PI / 2);
+    let circleLock = true;
+
+    for (let i = circleOffset; i < circleOffset + 2 * Math.PI; i += 1 / (8 * Math.PI)) {
+      arcStack.push([radius + bR * Math.cos(i), radius + bR * Math.sin(i)]);
+    }
+
+    const cStartPoint = arcStack.shift();
+    ctx.strokeStyle = color;
+    ctx.moveTo(cStartPoint[0], cStartPoint[1]);
+
+    function drawSin() {
+      ctx.beginPath();
+      ctx.save();
+
+      const sinStack = [];
+      for (let i = xOffset; i <= xOffset + axisLength; i += 20 / axisLength) {
+        const x = sp + (xOffset + i) / unit;
+        const y = Math.sin(x) * currRange;
+        const dx = i;
+        const dy = 2 * cR * (1 - currData) + (radius - cR) - unit * y;
+
+        ctx.lineTo(dx, dy);
+        sinStack.push([dx, dy]);
+      }
+
+      const startPoint = sinStack.shift();
+
+      ctx.lineTo(xOffset + axisLength, canvasHeight);
+      ctx.lineTo(xOffset, canvasHeight);
+      ctx.lineTo(startPoint[0], startPoint[1]);
+
+      const gradient = ctx.createLinearGradient(0, 0, 0, canvasHeight);
+      gradient.addColorStop(0, '#ffffff');
+      gradient.addColorStop(1, color);
+      ctx.fillStyle = gradient;
+      ctx.fill();
+      ctx.restore();
+    }
+
+    function render() {
+      ctx.clearRect(0, 0, canvasWidth, canvasHeight);
+      if (circleLock && type !== 'update') {
+        if (arcStack.length) {
+          const temp = arcStack.shift();
+          ctx.lineTo(temp[0], temp[1]);
+          ctx.stroke();
+        } else {
+          circleLock = false;
+          ctx.lineTo(cStartPoint[0], cStartPoint[1]);
+          ctx.stroke();
+          arcStack = null;
+
+          ctx.globalCompositeOperation = 'destination-over';
+          ctx.beginPath();
+          ctx.lineWidth = lineWidth;
+          ctx.arc(radius, radius, bR, 0, 2 * Math.PI, 1);
+
+          ctx.beginPath();
+          ctx.save();
+          ctx.arc(radius, radius, radius - 3 * lineWidth, 0, 2 * Math.PI, 1);
+
+          ctx.restore();
+          ctx.clip();
+          ctx.fillStyle = color;
+        }
+      } else {
+        if (data >= 0.85) {
+          if (currRange > range / 4) {
+            const t = range * 0.01;
+            currRange -= t;
+          }
+        } else if (data <= 0.1) {
+          if (currRange < range * 1.5) {
+            const t = range * 0.01;
+            currRange += t;
+          }
+        } else {
+          if (currRange <= range) {
+            const t = range * 0.01;
+            currRange += t;
+          }
+          if (currRange >= range) {
+            const t = range * 0.01;
+            currRange -= t;
+          }
+        }
+        if (data - currData > 0) {
+          currData += waveupsp;
+        }
+        if (data - currData < 0) {
+          currData -= waveupsp;
+        }
+
+        sp += 0.07;
+        drawSin();
+      }
+      self.timer = requestAnimationFrame(render);
+    }
+    render();
+  }
+
+  render() {
+    const { radio } = this.state;
+    const { percent, title, height } = this.props;
+    return (
+      <div
+        className={styles.waterWave}
+        ref={n => (this.root = n)}
+        style={{ transform: `scale(${radio})` }}
+      >
+        <div style={{ width: height, height, overflow: 'hidden' }}>
+          <canvas
+            className={styles.waterWaveCanvasWrapper}
+            ref={n => (this.node = n)}
+            width={height * 2}
+            height={height * 2}
+          />
+        </div>
+        <div className={styles.text} style={{ width: height }}>
+          {title && <span>{title}</span>}
+          <h4>{percent}%</h4>
+        </div>
+      </div>
+    );
+  }
+}
+
+export default WaterWave;

admin-web/src/components/Charts/WaterWave/index.less

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+@import '~antd/lib/style/themes/default.less';
+
+.waterWave {
+  position: relative;
+  display: inline-block;
+  transform-origin: left;
+  .text {
+    position: absolute;
+    top: 32px;
+    left: 0;
+    width: 100%;
+    text-align: center;
+    span {
+      color: @text-color-secondary;
+      font-size: 14px;
+      line-height: 22px;
+    }
+    h4 {
+      color: @heading-color;
+      font-size: 24px;
+      line-height: 32px;
+    }
+  }
+  .waterWaveCanvasWrapper {
+    transform: scale(0.5);
+    transform-origin: 0 0;
+  }
+}