react+ echarts 轮播饼图

react+ echarts 轮播饼图

图片示例


代码

import * as echarts from 'echarts';
import { useEffect } from 'react';
import styles from './styles.scss';const Student = (props) => {const { dataList, title } = props;// 过滤数据const visionList = [{ value: 1048, name: 'Search Engine'},{ value: 735, name: 'Direct' },{ value: 580, name: 'Email' },{ value: 484, name: 'Union Ads' },{ value: 300, name: 'Video Ads' }];useEffect(() => {loadingChart();}, [dataList])const loadingChart = () => {// 基于准备好的dom，初始化echarts实例var myChart = echarts.init(document.getElementById('Student'));// 指定图表的配置项和数据var option = {tooltip: {trigger: 'item'},series: [{name: '学生统计',type: 'pie',radius: ['56%', '84%'],data: visionList,color: ['#52CCB8', '#61C2F2', '#36B580', '#619DF2', '#2E8AE5'],emphasis: { // 设置高亮时显示标签label: {show: true},scale: true, // 设置高亮时放大图形scaleSize: 20},label: { // 设置图形标签样式show: false, // 未高亮时不显示标签，否则高亮时显示的标签会与静态的标签重叠position: 'center',// 设置标签展示内容,其中{d}、{b}为echarts标签内容格式器formatter: '{d_style|{d}}{per_style|%}\n{b_style|{b}}',// 为标签内容指定样式，只能设置series-pie.label支持的样式rich: {d_style: {fontSize: 20},per_style: {fontSize: 20},b_style: {fontSize: 18}}}}]}// 使用刚指定的配置项和数据显示图表。myChart.setOption(option);if (visionList.length <= 0) {myChart.showLoading({text: '暂无数据',showSpinner: false,textColor: '#fff',maskColor: 'rgba(0, 0, 0, 0)',fontSize: '18px'})} else {myChart.hideLoading()}let currentIndex = -1; // 当前高亮图形在饼图数据中的下标let changePieInterval = setInterval(selectPie, 1000); // 设置自动切换高亮图形的定时器function highlightPie() { // 取消所有高亮并高亮当前图形for (var idx in option.series[0].data)// 遍历饼图数据，取消所有图形的高亮效果myChart.dispatchAction({type: 'downplay',seriesIndex: 0,dataIndex: idx});// 高亮当前图形myChart.dispatchAction({type: 'highlight',seriesIndex: 0,dataIndex: currentIndex});}myChart.on('mouseover', (params) => { // 用户鼠标悬浮到某一图形时，停止自动切换并高亮鼠标悬浮的图形if (changePieInterval)clearInterval(changePieInterval);currentIndex = params.dataIndex;highlightPie();});myChart.on('mouseout', (params) => { // 用户鼠标移出时，重新开始自动切换if (changePieInterval)clearInterval(changePieInterval);changePieInterval = setInterval(selectPie, 1000);});function selectPie() { // 高亮效果切换到下一个图形var dataLen = option.series[0].data.length;currentIndex = (currentIndex + 1) % dataLen;highlightPie();}}return (<div id='Student' style={{ width: '77%', height: '250px', float: 'right', color: '#fff' }}></div>);
};export default Student;