React Charts - Center Label Customization

To customize the doughnut's center, declare the SVG markup in the centerTemplate. This template accepts the PieChart instance. Use this instance to call PieChart methods. For example, call the getInnerRaduis() method to get the radius of the doughnut hole.

TS JS

Backend API

import React from 'react'; import PieChart, { Series, Legend, Label, Connector, } from 'devextreme-react/pie-chart'; import type { PieChartTypes } from 'devextreme-react/pie-chart'; import { data } from './data.ts'; import type { CountryData } from './types.ts'; import CenterTemplate from './CenterTemplate.tsx'; const countries: string[] = Array.from(new Set(data.map((item: CountryData): string => item.country))); const customizeLabel = (e: PieChartTypes.PointInfo): string => `${e.argumentText}\n${e.valueText}`; function App() { const pies = countries.map((country: string) => ( <PieChart id="pie-chart" key={country} dataSource={data.filter((i: CountryData): boolean => i.country === country)} resolveLabelOverlapping="shift" sizeGroup="piesGroup" innerRadius={0.65} centerRender={CenterTemplate} type="doughnut" > <Series argumentField="commodity" valueField="total" > <Label visible={true} format="fixedPoint" customizeText={customizeLabel} backgroundColor="none"> <Connector visible={true}></Connector> </Label> </Series> <Legend visible={false}></Legend> </PieChart> )); return ( <div> <div className="long-title"><h3>Energy Production (GWh, 2024)</h3></div> <div className="pies-container"> {pies} </div> </div> ); } export default App;

import React from 'react'; import PieChart, { Series, Legend, Label, Connector, } from 'devextreme-react/pie-chart'; import { data } from './data.js'; import CenterTemplate from './CenterTemplate.js'; const countries = Array.from(new Set(data.map((item) => item.country))); const customizeLabel = (e) => `${e.argumentText}\n${e.valueText}`; function App() { const pies = countries.map((country) => ( <PieChart id="pie-chart" key={country} dataSource={data.filter((i) => i.country === country)} resolveLabelOverlapping="shift" sizeGroup="piesGroup" innerRadius={0.65} centerRender={CenterTemplate} type="doughnut" > <Series argumentField="commodity" valueField="total" > <Label visible={true} format="fixedPoint" customizeText={customizeLabel} backgroundColor="none" > <Connector visible={true}></Connector> </Label> </Series> <Legend visible={false}></Legend> </PieChart> )); return ( <div> <div className="long-title"> <h3>Energy Production (GWh, 2024)</h3> </div> <div className="pies-container">{pies}</div> </div> ); } export default App;

import React from 'react'; import type { PieChartRef } from 'devextreme-react/pie-chart'; const formatNumber = new Intl.NumberFormat('en-US', { minimumFractionDigits: 0, }).format; function calculateTotal(pieChart: ReturnType<PieChartRef['instance']>): string { return formatNumber(pieChart .getAllSeries()[0] .getVisiblePoints() .reduce((s, p): number => s + Number(p.originalValue), 0)); } function getImagePath(country: string): string { return `../../../../images/flags/${country.replace(/\s/, '').toLowerCase()}.svg`; } export default function TooltipTemplate(pieChart: ReturnType<PieChartRef['instance']>) { const { country } = pieChart.getAllSeries()[0].getVisiblePoints()[0].data; return ( <svg> <circle cx="100" cy="100" r={pieChart.getInnerRadius() - 6} fill="#eee"></circle> <image href={getImagePath(country)} x="70" y="58" width="60" height="40" /> <text textAnchor="middle" x="100" y="120" style={{ fontSize: 18, fill: '#494949' }}> <tspan x="100">{country}</tspan> <tspan x="100" dy="20px" style={{ fontWeight: 600 }}>{ calculateTotal(pieChart) }</tspan> </text> </svg> ); }

import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.tsx'; ReactDOM.render( <App />, document.getElementById('app'), );

import type { CountryData } from './types.ts'; export const data: CountryData[] = [ { country: 'France', commodity: 'Nuclear', total: 360000 }, { country: 'France', commodity: 'Thermal', total: 52000 }, { country: 'Germany', commodity: 'Thermal', total: 210000 }, { country: 'France', commodity: 'Wind', total: 50000 }, { country: 'Germany', commodity: 'Wind', total: 140000 }, { country: 'France', commodity: 'Solar', total: 23000 }, { country: 'Germany', commodity: 'Solar', total: 70000 }, { country: 'Germany', commodity: 'Hydro', total: 20000 }, { country: 'France', commodity: 'Hydro', total: 65000 }, { country: 'Germany', commodity: 'Biomass', total: 45000 }, ];

export type CountryData = { country: string; commodity: string; total: number; };

import React from 'react'; const formatNumber = new Intl.NumberFormat('en-US', { minimumFractionDigits: 0, }).format; function calculateTotal(pieChart) { return formatNumber( pieChart .getAllSeries()[0] .getVisiblePoints() .reduce((s, p) => s + Number(p.originalValue), 0), ); } function getImagePath(country) { return `../../../../images/flags/${country.replace(/\s/, '').toLowerCase()}.svg`; } export default function TooltipTemplate(pieChart) { const { country } = pieChart.getAllSeries()[0].getVisiblePoints()[0].data; return ( <svg> <circle cx="100" cy="100" r={pieChart.getInnerRadius() - 6} fill="#eee" ></circle> <image href={getImagePath(country)} x="70" y="58" width="60" height="40" /> <text textAnchor="middle" x="100" y="120" style={{ fontSize: 18, fill: '#494949' }} > <tspan x="100">{country}</tspan> <tspan x="100" dy="20px" style={{ fontWeight: 600 }} > {calculateTotal(pieChart)} </tspan> </text> </svg> ); }

import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render(<App />, document.getElementById('app'));

export const data = [ { country: 'France', commodity: 'Nuclear', total: 360000 }, { country: 'France', commodity: 'Thermal', total: 52000 }, { country: 'Germany', commodity: 'Thermal', total: 210000 }, { country: 'France', commodity: 'Wind', total: 50000 }, { country: 'Germany', commodity: 'Wind', total: 140000 }, { country: 'France', commodity: 'Solar', total: 23000 }, { country: 'Germany', commodity: 'Solar', total: 70000 }, { country: 'Germany', commodity: 'Hydro', total: 20000 }, { country: 'France', commodity: 'Hydro', total: 65000 }, { country: 'Germany', commodity: 'Biomass', total: 45000 }, ];

<!DOCTYPE html> <html lang="en"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/26.1.5/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="./bundle.css" /> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> <script src="bundles/vendor/react.vendor.js"></script> <script src="./bundle.js"></script> </body> </html>

.pies-container { margin: auto; width: 800px; } .pies-container > div { width: 400px; float: left; margin-top: -50px; } .long-title h3 { font-weight: 200; font-size: 28px; text-align: center; margin-bottom: 20px; } .dxc-hole-template:focus { outline: none; }