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Charts

API - Select a Point

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This demo shows how easily you can access a necessary chart series and select a specific point in it using the API.

http://www.statisticbrain.com
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import React from 'react'; import Chart, { CommonSeriesSettings, Series, SelectionStyle, Hatching, Legend, Export } from 'devextreme-react/chart'; import { catBreedsData } from './data.js'; class App extends React.Component { render() { return ( <Chart id="chart" dataSource={catBreedsData} rotated={true} onDone={onDone} onPointClick={onPointClick} title="Most Popular US Cat Breeds" > <CommonSeriesSettings argumentField="breed" type="bar" /> <Series valueField="count" name="breeds" color="#a3d6d2" > <SelectionStyle color="#ec2e7a"> <Hatching direction="none" /> </SelectionStyle> </Series> <Legend visible={false} /> <Export enabled={true} /> </Chart> ); } } function onDone({ component }) { component.getSeriesByPos(0).getPointsByArg('Siamese')[0].select(); } function onPointClick({ target: point }) { if (point.isSelected()) { point.clearSelection(); } else { point.select(); } } export default App;
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render( <App />, document.getElementById('app') );
<!DOCTYPE html> <html> <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=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import('./index.js'); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>
#chart { height: 440px; }
export const catBreedsData = [{ breed: 'Domestic Shorthair', count: 61046 }, { breed: 'American Shorthair', count: 37545 }, { breed: 'Domestic Medium Hair', count: 16776 }, { breed: 'Domestic Long Hair', count: 15049 }, { breed: 'Siamese', count: 14582 }, { breed: 'Maine Coon', count: 10852 }, { breed: 'Persian', count: 6717 }, { breed: 'Russian Blue', count: 3864 }, { breed: 'Himalayan', count: 3701 }, { breed: 'Ragdoll', count: 3567 }, { breed: 'Bengal', count: 3118 }, { breed: 'Manx', count: 2349 }, { breed: 'British Shorthair', count: 2171 }, { breed: 'Norwegian Forest Cat', count: 1827 }, { breed: 'Bombay', count: 1580 }];
System.config({ transpiler: 'plugin-babel', paths: { 'npm:': 'https://unpkg.com/' }, defaultExtension: 'js', map: { 'react': 'npm:react@16/umd/react.development.js', 'react-dom': 'npm:react-dom@16/umd/react-dom.development.js', 'prop-types': 'npm:prop-types/prop-types.js', 'devextreme': 'npm:devextreme@19.2', 'devextreme-react': 'npm:devextreme-react@19.2', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.7/dist/quill.js', 'devexpress-diagram': 'npm:devexpress-diagram', 'devexpress-gantt': 'npm:devexpress-gantt', // SystemJS plugins 'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js' }, packages: { 'devextreme': { defaultExtension: 'js' }, 'devextreme-react': { main: 'index.js' } }, babelOptions: { sourceMaps: false, stage0: true, react: true } });