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Gauges

Update Bar Gauge Data at Runtime

Documentation

This demo illustrates how to bind an array of values to the BarGauge. Since an array can not be bound to a field as a regular value, it is bound as a computed one.

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import React from 'react'; import { BarGauge, Label } from 'devextreme-react/bar-gauge'; import { SelectBox } from 'devextreme-react/select-box'; import { colors } from './data.js'; const palette = ['#ff0000', '#00ff00', '#0000ff']; class App extends React.Component { constructor(props) { super(props); this.state = { basis: this.getBasicColors(colors[0].code), currentColor: colors[0].code }; this.onSelectionChanged = ({ selectedItem: { code } }) => { this.setState({ currentColor: code, basis: this.getBasicColors(code) }); }; } render() { return ( <div> <div className={'long-title'}> <h3>Colors Representation via Basic Colors</h3> </div> <div id={'gauge-demo'}> <BarGauge id={'gauge'} startValue={0} endValue={255} palette={palette} values={this.state.basis} > <Label visible={false} /> </BarGauge> <div className={'action-container'}> <SelectBox id={'select-color'} width={150} dataSource={colors} value={this.state.currentColor} displayExpr={'name'} valueExpr={'code'} onSelectionChanged={this.onSelectionChanged} /> <div className={'color-box'} style={{ backgroundColor: this.state.currentColor }} ></div> </div> </div> </div> ); } getBasicColors(value) { var code = Number(`0x${ value.slice(1)}`); return [ (code >> 16) & 0xff, (code >> 8) & 0xff, code & 0xff ]; } } 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/19.1.7/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/19.1.7/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>
#gauge-demo { height: 440px; width: 100%; } #gauge { width: 80%; height: 100%; margin-top: 20px; float: left; } .action-container { width: 20%; text-align: left; margin-top: 20px; float: left; } .color-box { width: 40px; height: 40px; margin-top: 20px; } .long-title h3 { font-weight: 200; font-size: 28px; text-align: center; margin-bottom: 20px; }
export const colors = [{ name: 'Amaranth', code: '#e52b50' }, { name: 'Amethyst', code: '#9966cc' }, { name: 'Ash grey', code: '#b2beb5' }, { name: 'Barn red', code: '#7c0a02' }, { name: 'Imperial', code: '#602f6b' }, { name: 'Lemon lime', code: '#e3ff00' }, { name: 'Mountain Meadow', code: '#30ba8f' }, { name: 'Outer Space', code: '#414a4c' }, { name: 'Persian plum', code: '#701c1c' }, { name: 'Seal brown', code: '#321414' }, { name: 'Twilight lavender', code: '#8a496b' }, { name: 'Umber', code: '#635147' }];
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@19.1', 'devextreme-react': 'npm:devextreme-react@19.1', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.7/dist/quill.js', // 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 } });