React Charts - Legend Markers Customization

import React from 'react'; import { Chart, Series, CommonSeriesSettings, Point, Legend, } from 'devextreme-react/chart'; import { dataSource } from './data.js'; import markerTemplate from './MarkerTemplate.js'; function onLegendClick(e) { e.target.isVisible() ? e.target.hide() : e.target.show(); } function App() { return ( <Chart id="chart" title="Noisy and Original Signals" dataSource={dataSource} onLegendClick={onLegendClick} > <CommonSeriesSettings argumentField="argument"> <Point visible={false}></Point> </CommonSeriesSettings> <Series valueField="originalValue" name="Original Signal" /> <Series valueField="value" name="Noisy Signal" /> <Legend verticalAlignment="bottom" horizontalAlignment="center" markerRender={markerTemplate} ></Legend> </Chart> ); } export default App;

import React from 'react'; const markerPath = { 'Original Signal': 'M 0 8 C 2 4 7 4 9.5 8 C 11 12 16 12 18 8 L 18 10 C 16 14 11 14 8.5 10 C 7 6 2 6 0 10 Z', 'Noisy Signal': 'M 18 8 L 12 12 L 7 3 L 0 7.4 L 0 10 L 6 6 L 11 15 L 18 10.6 Z', }; export default function MarkerTemplate(item) { const color = item.series.isVisible() ? item.marker.fill : '#888'; return ( <svg> <rect x={0} y={0} width={18} height={18} fill={color} opacity={0.3}></rect> <path d={markerPath[item.series.name]} fill={color}></path> </svg> ); }

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

function generateData(start: number, end: number, step: number) { const data: ({ value: number; originalValue: number; argument: number; })[] = []; for (let i = start; i < end; i += step) { const originalValue = Math.sin(i) / i; data.push({ value: originalValue + ((0.5 - Math.random()) / 10), originalValue, argument: i }); } return data; } export const dataSource = generateData(2.5, 12, 0.1);

window.exports = window.exports || {}; window.config = { transpiler: 'ts', typescriptOptions: { module: 'system', emitDecoratorMetadata: true, experimentalDecorators: true, jsx: 'react', }, meta: { 'react': { 'esModule': true, }, 'typescript': { 'exports': 'ts', }, 'devextreme/time_zone_utils.js': { 'esModule': true, }, 'devextreme/localization.js': { 'esModule': true, }, 'devextreme/viz/palette.js': { 'esModule': true, }, 'openai': { 'esModule': true, }, }, paths: { 'npm:': 'https://cdn.jsdelivr.net/npm/', 'bundles:': '../../../../bundles/', 'externals:': '../../../../bundles/externals/', }, defaultExtension: 'js', map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@4.2.4/lib/typescript.js', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', 'react': 'npm:react@17.0.2/umd/react.development.js', 'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js', 'prop-types': 'npm:prop-types/prop-types.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@3.4.4/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign', 'devextreme': 'npm:devextreme@25.1.4/cjs', 'devextreme-react': 'npm:devextreme-react@25.1.4/cjs', 'devextreme-quill': 'npm:devextreme-quill@1.7.3/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.19/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.62/dist/dx-gantt.js', 'inferno': 'npm:inferno@8.2.3/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@8.2.3/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js', '@preact/signals-core': 'npm:@preact/signals-core@1.8.0/dist/signals-core.min.js', 'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3', // SystemJS plugins 'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js', // Prettier 'prettier/standalone': 'npm:prettier@2.8.8/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js', }, packages: { 'devextreme': { defaultExtension: 'js', }, 'devextreme-react': { main: 'index.js', }, 'devextreme-react/common': { main: 'index.js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/common/core/events/utils': { main: 'index', }, 'devextreme/localization/messages': { format: 'json', defaultExtension: 'json', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', ], babelOptions: { sourceMaps: false, stage0: true, react: true, }, }; System.config(window.config);

import React from 'react'; const markerPath = { 'Original Signal': 'M 0 8 C 2 4 7 4 9.5 8 C 11 12 16 12 18 8 L 18 10 C 16 14 11 14 8.5 10 C 7 6 2 6 0 10 Z', 'Noisy Signal': 'M 18 8 L 12 12 L 7 3 L 0 7.4 L 0 10 L 6 6 L 11 15 L 18 10.6 Z', }; export default function MarkerTemplate(item) { const color = item.series.isVisible() ? item.marker.fill : '#888'; return ( <svg> <rect x={0} y={0} width={18} height={18} fill={color} opacity={0.3} ></rect> <path d={markerPath[item.series.name]} fill={color} ></path> </svg> ); }

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

function generateData(start, end, step) { const data = []; for (let i = start; i < end; i += step) { const originalValue = Math.sin(i) / i; data.push({ value: originalValue + (0.5 - Math.random()) / 10, originalValue, argument: i }); } return data; } export const dataSource = generateData(2.5, 12, 0.1);

<!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/25.1.4/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import("./index.tsx"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>

#chart { height: 440px; }