目录
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