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Update Circular Gauge Data at Runtime

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

Backend API
import React, { useCallback, useState } from 'react'; import { CircularGauge, Scale, Label, RangeContainer, Range, Tooltip, Title, Font, } from 'devextreme-react/circular-gauge'; import { SelectBox } from 'devextreme-react/select-box'; import { dataSource, seasonLabel } from './data.ts'; function customizeText({ valueText }) { return `${valueText} °C`; } function App() { const [value, setValue] = useState(dataSource[0].mean); const [subvalues, setSubvalues] = useState([dataSource[0].min, dataSource[0].max]); const onSelectionChanged = useCallback(({ selectedItem }) => { setValue(selectedItem.mean); setSubvalues([selectedItem.min, selectedItem.max]); }, [setValue, setSubvalues]); return ( <div id="gauge-demo"> <CircularGauge id="gauge" value={value} subvalues={subvalues} > <Scale startValue={10} endValue={40} tickInterval={5}> <Label customizeText={customizeText} /> </Scale> <RangeContainer> <Range startValue={10} endValue={20} color="#0077BE" /> <Range startValue={20} endValue={30} color="#E6E200" /> <Range startValue={30} endValue={40} color="#77DD77" /> </RangeContainer> <Tooltip enabled={true} /> <Title text="Temperature in the Greenhouse"> <Font size={28} /> </Title> </CircularGauge> <SelectBox id="seasons" width={150} inputAttr={seasonLabel} dataSource={dataSource} defaultValue={dataSource[0]} displayExpr="name" onSelectionChanged={onSelectionChanged} /> </div> ); } export default App;
import React, { useCallback, useState } from 'react'; import { CircularGauge, Scale, Label, RangeContainer, Range, Tooltip, Title, Font, } from 'devextreme-react/circular-gauge'; import { SelectBox } from 'devextreme-react/select-box'; import { dataSource, seasonLabel } from './data.js'; function customizeText({ valueText }) { return `${valueText} °C`; } function App() { const [value, setValue] = useState(dataSource[0].mean); const [subvalues, setSubvalues] = useState([dataSource[0].min, dataSource[0].max]); const onSelectionChanged = useCallback( ({ selectedItem }) => { setValue(selectedItem.mean); setSubvalues([selectedItem.min, selectedItem.max]); }, [setValue, setSubvalues], ); return ( <div id="gauge-demo"> <CircularGauge id="gauge" value={value} subvalues={subvalues} > <Scale startValue={10} endValue={40} tickInterval={5} > <Label customizeText={customizeText} /> </Scale> <RangeContainer> <Range startValue={10} endValue={20} color="#0077BE" /> <Range startValue={20} endValue={30} color="#E6E200" /> <Range startValue={30} endValue={40} color="#77DD77" /> </RangeContainer> <Tooltip enabled={true} /> <Title text="Temperature in the Greenhouse"> <Font size={28} /> </Title> </CircularGauge> <SelectBox id="seasons" width={150} inputAttr={seasonLabel} dataSource={dataSource} defaultValue={dataSource[0]} displayExpr="name" onSelectionChanged={onSelectionChanged} /> </div> ); } export default App;
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.tsx'; ReactDOM.render( <App />, document.getElementById('app'), );
export const dataSource = [{ name: 'Summer', mean: 35, min: 28, max: 38, }, { name: 'Autumn', mean: 24, min: 20, max: 32, }, { name: 'Winter', mean: 18, min: 16, max: 23, }, { name: 'Spring', mean: 27, min: 18, max: 31, }]; export const seasonLabel = { 'aria-label': 'Season' };
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, }, }, paths: { 'npm:': 'https://unpkg.com/', }, defaultExtension: 'js', map: { 'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js', 'typescript': 'npm:typescript@4.2.4/lib/typescript.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@15.8.1/prop-types.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@24.1.4/cjs', 'devextreme-react': 'npm:devextreme-react@24.1.4/cjs', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.10/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.56/dist/dx-gantt.js', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/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', '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/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', 'npm:@devextreme/runtime@3.0.13/inferno/package.json', ], babelOptions: { sourceMaps: false, stage0: true, react: true, }, }; System.config(window.config);
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render(<App />, document.getElementById('app'));
export const dataSource = [ { name: 'Summer', mean: 35, min: 28, max: 38, }, { name: 'Autumn', mean: 24, min: 20, max: 32, }, { name: 'Winter', mean: 18, min: 16, max: 23, }, { name: 'Spring', mean: 27, min: 18, max: 31, }, ]; export const seasonLabel = { 'aria-label': 'Season' };
<!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="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/24.1.4/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://unpkg.com/core-js@2.6.12/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.tsx"); </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%; float: left; } #seasons { width: 20%; float: left; text-align: left; margin-top: 20px; }