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Charts

Polar Chart Zooming and Scrolling API

To zoom a PolarChart into a specific range on the value axis, specify the PolarChart's visualRange option.

In this demo, this option is bound to the RangeSelector's value. When you move the sliders in the RangeSelector, you change the visualRange and zoom the PolarChart.

Once you set the zoom level, move the selected range left and right to scroll through data.

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import React from 'react'; import { dataSource } from './data.js'; import PolarChart, { CommonSeriesSettings, Series, Point, ArgumentAxis, ValueAxis, Export, Legend } from 'devextreme-react/polar-chart'; import RangeSelector, { Size, Margin, Scale, MinorTick, Behavior } from 'devextreme-react/range-selector'; class App extends React.Component { constructor(props) { super(props); this.state = { visualRange: { startValue: 0, endValue: 8 } }; this.updateVisualRange = this.updateVisualRange.bind(this); } render() { return ( <React.Fragment> <PolarChart id="zoomedChart" dataSource={dataSource} title="Stochastic Process" > <CommonSeriesSettings argumentField="argument" closed={false} /> <Series type="scatter" name="Test results" valueField="value" > <Point size={8} /> </Series> <Series type="line" name="Expected average" valueField="originalValue" > <Point visible={false} /> </Series> <ArgumentAxis startAngle={90} tickInterval={30} /> <ValueAxis visualRange={this.state.visualRange} /> <Export enabled={true} /> <Legend hoverMode="excludePoints" verticalAlignment="top" horizontalAlignment="center" /> </PolarChart> <RangeSelector onValueChanged={this.updateVisualRange} > <Size height={100} /> <Margin top={10} left={60} bottom={10} right={50} /> <Scale startValue={0} endValue={8} minorTickInterval={0.1} tickInterval={1} > <MinorTick visible={false} /> </Scale> <Behavior callValueChanged="onMoving" /> </RangeSelector> </React.Fragment> ); } updateVisualRange(e) { this.setState({ visualRange: e.value }); } } 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>
#zoomedChart { height: 440px; width: 100%; }
function generateData(start, end, step) { const data = []; for (let i = start; i < end; i += step) { const originalValue = Math.log(i); data.push({ value: originalValue - (Math.sin(Math.random() * i) * i / end) + (1 - Math.random() * 2), originalValue: originalValue, argument: i }); } return data; } export const dataSource = generateData(0, 360, 0.75);
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 } });