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Echarts实现点击列表联动饼图的示例代码

2023-05-09 10:20:53 作者：前端养生专家

本文主要介绍了Echarts实现点击列表联动饼图的示例代码，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧

简单易懂的Echars案例，实现点击列表联动饼图

安装 echarts-for-react
项目中引入 import ReactECharts from 'echarts-for-react';
开始写案例啦！！！

效果图

1. 首先我们先写一个左侧列表 StageLine

利用StageItem 将 data 中的数据遍历并展示。

import React = require('react');
import { StageItem } from './StageItem';
const data = [
  { name: '糖', value: '12' },
  { name: '蛋白质', value: '24' },
  { name: '脂肪', value: '15' },
];
type StageLineProps = {
  handleClickPie?: (index: number) => void;
  setCurrentIndex?: (o: number) => void;
};
export default function StageLine({
  handleClickPie,
  setCurrentIndex,
}: StageLineProps) {
  return (
    <div>
      {data?.map((item, index) => {
        return (
          <div
            key={index}
            onClick={() => {
              handleClickPie?.(index);
              setCurrentIndex?.(index);
            }}
          >
            <StageItem title={item.name} value={item.value} />
          </div>
        );
      })}
    </div>
  );
}

StageLine 子组件 StageItem

import { Group, Text } from '@mantine/core';
import React = require('react');
type StageItemProps = { title: string; value: string };
export function StageItem({ title, value }: StageItemProps) {
  return (
    <Group
      spacing={2}
      noWrap
      align="center"
      sx={{
        cursor: 'pointer',
        width: 200,
        display: 'flex',
        flexDirection: 'row',
        flexWrap: 'nowrap',
        justifyContent: 'center',
        alignItems: 'stretch',
        alignContent: 'stretch',
        alignSelf: 'normal',
      }}
    >
      <Text
        sx={{
          backgroundColor: '#004399',
          padding: '6px 8px',
          color: 'white',
          minWidth: 40,
          maxWidth: 85,
          lineHeight: '18px',
          alignItems: 'stretch',
          display: 'inline-block',
          flexShrink: 0,
        }}
        size={12}
        weight={600}
      >
        {title}
      </Text>
      <Text
        sx={{
          backgroundColor: 'rgba(0, 67, 153, 0.06)',
          padding: '6px 8px',
          color: '#004399',
          flexGrow: 1,
          '.react-katex ': {
            // height: '26px',
          },
        }}
        size={12}
        weight={600}
      >
        {value ?? '-'}
        {/* <div style={{ display: 'inline-block' }}>{unit}</div> */}
      </Text>
    </Group>
  );
}

2.接下来我们写右侧饼图

我们利用 forwardRef 来接受从父组件传递过来的 ref，并将 ref 赋给饼图组件 ReactECharts。拿到饼图的ref 我么就可以实现左右联动的效果啦！

import { EChartsInstance } from 'echarts-for-react';
import { log } from 'echarts/types/src/util/log';
import { forwardRef, lazy } from 'react';
import React = require('react');
const ReactECharts = lazy(() => import('echarts-for-react'));
const data = [
  { name: '糖', value: '12' },
  { name: '蛋白质', value: '24' },
  { name: '脂肪', value: '15' },
];
export const Pie = forwardRef<EChartsInstance, any>((_, ref) => {
  // console.log(ref,2)
  const options = {
    color: [
      '#3F72BE',
      '#1F3C88',
      '#2E4FA3',
      '#6B90D8',
      '#8DBEEB',
      '#B6D0F8',
      '#DAEBFB',
      '#F0F8FD',
    ],
    title: {
      text: '能量',
      left: 'center',
      textStyle: {
        fontSize: '16px',
        fontWeight: 700,
      },
    },
    tooltip: {
      trigger: 'item',
      formatter: `{b} <br/>{d}% `,
      showContent: true,
      alwaysShowContent: false,
      displayMode: 'single',
      renderMode: 'auto',
      confine: null,
      showDelay: 0,
      hideDelay: 100,
      transitionDuration: 0.4,
      enterable: true,
      textStyle: {
        fontSize: 14,
        color: '#333',
      },
    },
    legend: {
      itemStyle: {
        borderWidth: 0,
      },
      orient: 'vertical',
      backgroundColor: 'rgba(0,67,153,0.06)',
      bottom: 100 - 17 * (data?.length ?? 0),
      borderRadius: 4,
      itemWidth: 10,
      itemHeight: 10,
      padding: [12, 20],
      itemGap: 7,
      icon: 'rect',
      textStyle: {
        padding: [0, 0, 0, 4],
        color: '#111',
        fontWeight: 400,
        fontFamily: 'sans-serif',
        lineHeight: 15,
        fontSize: 12,
      },
    },
    series: [
      {
        itemStyle: {
          borderWidth: 1,
          borderRadius: 0,
          borderColor: '#fff',
        },
        name: '',
        type: 'pie',
        radius: '80%',
        top: -115,
        label: {
          show: false,
          position: 'center',
        },
        data: data,
        labelLine: {
          show: false,
        },
        emphasis: {
          itemStyle: {
            shadowBlur: 10,
            shadowOffsetX: 0,
            shadowColor: 'rgba(0, 0, 0, 0.5)',
          },
        },
      },
    ],
  };
  return (
    <div>
      <ReactECharts
        ref={ref}
        option={options}
        style={{ width: 250, height: 400, margin: '25px auto' }}
        opts={{ renderer: 'svg' }}
      />
    </div>
  );
});

3. 在最外层父级，写一些方法，进行联动操作。

handleClickPie 方法是当我们点击左侧列表时，对应部分的右边饼图高亮显示，点击当前项，同时要取消上一次点击项的高亮。那么此时，我们就要拿到，之前高亮的项的index（prePieRef）和当前的高亮的项的index（currentIndex）。

clickOutsidePieRef：点击屏幕其他位置时，取消当前高亮

注意📢：这个ref必须给饼图的外层容器，否则不能生效！

import { Box, Group } from '@mantine/core';
import * as React from 'react';
import { useRef, useState } from 'react';
import { Pie } from './Pie';
import StageLine from './StageLine';
import './style.css';
import ReactECharts from 'echarts-for-react';
import { useClickOutside } from '@mantine/hooks';
export default function App() {
  const pieRef = useRef<ReactECharts>(null);
  const prePieRef = useRef(-1);
  const [currentIndex, setCurrentIndex] = useState(-1);
  const handleClickPie = (index: number) => {
    if (prePieRef.current >= 0) {
      pieRef?.current?.getEchartsInstance()?.dispatchAction({
        type: 'downplay',
        seriesIndex: 0,
        dataIndex: prePieRef.current,
      });
    }
    pieRef?.current?.getEchartsInstance()?.dispatchAction({
      type: 'highlight',
      seriesIndex: 0,
      dataIndex: index,
    });
    prePieRef.current = index;
    pieRef?.current?.getEchartsInstance()?.dispatchAction({
      type: 'showTip',
      seriesIndex: 0,
      dataIndex: index,
    });
  };
  const clickOutsidePieRef = useClickOutside(() => {
    const downplay = pieRef?.current?.getEchartsInstance()?.dispatchAction({
      type: 'downplay',
      seriesIndex: 0,
      dataIndex: currentIndex,
    });
    const hideTip = pieRef?.current?.getEchartsInstance()?.dispatchAction({
      type: 'hideTip',
    });
    return { downplay, hideTip };
  });
  console.log(pieRef)
  return (
    <Group>
      <StageLine
        handleClickPie={handleClickPie}
        setCurrentIndex={setCurrentIndex}
      />
      <Box ref={clickOutsidePieRef}>
        <Pie ref={pieRef} />
      </Box>
    </Group>
  );
}

最后附上源码：https://stackblitz.com/edit/react-ts-reghex?file=App.tsx,Pie.tsx,StageItem.tsx,StageLine.tsx

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