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Update Linear Gauge Data at Runtime

Documentation

This demo illustrates data binding in the LinearGauge component. The bound data changes when a user selects a new location in the City drop-down menu.

Backend API
import React, { useCallback, useState } from 'react'; import { LinearGauge, Title, Font, Geometry, Scale, RangeContainer, Range, ValueIndicator, Label, } from 'devextreme-react/linear-gauge'; import { SelectBox, SelectBoxTypes } from 'devextreme-react/select-box'; import { cities, cityLabel } from './data.ts'; const customTicks = [900, 1000, 1020, 1100]; const temperatureGaugeStartValue = -40; const pressureLabelFormat = { type: 'decimal', }; function App() { const [selectBoxValue, setSelectBoxValue] = useState(cities[0].data); const [temperature, setTemperature] = useState(cities[0].data.temperature); const [humidity, setHumidity] = useState(cities[0].data.humidity); const [pressure, setPressure] = useState(cities[0].data.pressure); const onSelectionChanged = useCallback((e: SelectBoxTypes.SelectionChangedEvent) => { const weatherData = e.selectedItem.data; setSelectBoxValue(weatherData); setTemperature(weatherData.temperature); setHumidity(weatherData.humidity); setPressure(weatherData.pressure); }, [setSelectBoxValue, setTemperature, setHumidity, setPressure]); return ( <div> <div className="long-title"> <h3>Weather Indicators</h3> </div> <div id="gauge-demo"> <LinearGauge className="gauge-element" value={temperature} > <Title text="Temperature (°C)"> <Font size={16} /> </Title> <Geometry orientation="vertical" /> <Scale startValue={temperatureGaugeStartValue} endValue={40} tickInterval={40} /> <RangeContainer backgroundColor="none"> <Range startValue={temperatureGaugeStartValue} endValue={0} color="#679EC5" /> <Range startValue={0} endValue={40} /> </RangeContainer> </LinearGauge> <LinearGauge className="gauge-element" value={humidity} > <Title text="Humidity (%)"> <Font size={16} /> </Title> <Geometry orientation="vertical" /> <Scale startValue={0} endValue={100} tickInterval={10} /> <RangeContainer backgroundColor="#CACACA" /> <ValueIndicator type="rhombus" color="#A4DDED" /> </LinearGauge> <LinearGauge className="gauge-element" value={pressure} > <Title text="Barometric Pressure (mb)"> <Font size={16} /> </Title> <Geometry orientation="vertical" /> <Scale startValue={900} endValue={1100} customTicks={customTicks}> <Label format={pressureLabelFormat} /> </Scale> <RangeContainer> <Range startValue={900} endValue={1000} color="#679EC5" /> <Range startValue={1000} endValue={1020} color="#A6C567" /> <Range startValue={1020} endValue={1100} color="#E18E92" /> </RangeContainer> <ValueIndicator type="circle" color="#E3A857" /> </LinearGauge> </div> <SelectBox dataSource={cities} valueExpr="data" inputAttr={cityLabel} value={selectBoxValue} displayExpr="name" onSelectionChanged={onSelectionChanged} /> </div> ); } export default App;
import React, { useCallback, useState } from 'react'; import { LinearGauge, Title, Font, Geometry, Scale, RangeContainer, Range, ValueIndicator, Label, } from 'devextreme-react/linear-gauge'; import { SelectBox } from 'devextreme-react/select-box'; import { cities, cityLabel } from './data.js'; const customTicks = [900, 1000, 1020, 1100]; const temperatureGaugeStartValue = -40; const pressureLabelFormat = { type: 'decimal', }; function App() { const [selectBoxValue, setSelectBoxValue] = useState(cities[0].data); const [temperature, setTemperature] = useState(cities[0].data.temperature); const [humidity, setHumidity] = useState(cities[0].data.humidity); const [pressure, setPressure] = useState(cities[0].data.pressure); const onSelectionChanged = useCallback( (e) => { const weatherData = e.selectedItem.data; setSelectBoxValue(weatherData); setTemperature(weatherData.temperature); setHumidity(weatherData.humidity); setPressure(weatherData.pressure); }, [setSelectBoxValue, setTemperature, setHumidity, setPressure], ); return ( <div> <div className="long-title"> <h3>Weather Indicators</h3> </div> <div id="gauge-demo"> <LinearGauge className="gauge-element" value={temperature} > <Title text="Temperature (°C)"> <Font size={16} /> </Title> <Geometry orientation="vertical" /> <Scale startValue={temperatureGaugeStartValue} endValue={40} tickInterval={40} /> <RangeContainer backgroundColor="none"> <Range startValue={temperatureGaugeStartValue} endValue={0} color="#679EC5" /> <Range startValue={0} endValue={40} /> </RangeContainer> </LinearGauge> <LinearGauge className="gauge-element" value={humidity} > <Title text="Humidity (%)"> <Font size={16} /> </Title> <Geometry orientation="vertical" /> <Scale startValue={0} endValue={100} tickInterval={10} /> <RangeContainer backgroundColor="#CACACA" /> <ValueIndicator type="rhombus" color="#A4DDED" /> </LinearGauge> <LinearGauge className="gauge-element" value={pressure} > <Title text="Barometric Pressure (mb)"> <Font size={16} /> </Title> <Geometry orientation="vertical" /> <Scale startValue={900} endValue={1100} customTicks={customTicks} > <Label format={pressureLabelFormat} /> </Scale> <RangeContainer> <Range startValue={900} endValue={1000} color="#679EC5" /> <Range startValue={1000} endValue={1020} color="#A6C567" /> <Range startValue={1020} endValue={1100} color="#E18E92" /> </RangeContainer> <ValueIndicator type="circle" color="#E3A857" /> </LinearGauge> </div> <SelectBox dataSource={cities} valueExpr="data" inputAttr={cityLabel} value={selectBoxValue} 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 cities = [{ name: 'London', id: '1', data: { temperature: 10, humidity: 81, pressure: 1002.1, }, }, { name: 'Berlin', id: '2', data: { temperature: 14, humidity: 58, pressure: 1008.5, }, }, { name: 'New York', id: '3', data: { temperature: 3, humidity: 89, pressure: 1016.2, }, }, { name: 'Moscow', id: '4', data: { temperature: 2, humidity: 51, pressure: 1016.5, }, }, { name: 'Bangkok', id: '5', data: { temperature: 37, humidity: 39, pressure: 1007.0, }, }]; export const cityLabel = { 'aria-label': 'City' };
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@23.2.5/cjs', 'devextreme-react': 'npm:devextreme-react@23.2.5/cjs', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.6.4/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.5/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.51/dist/dx-gantt.js', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12', '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@2.8.4/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.4/parser-html.js', }, packages: { 'devextreme': { defaultExtension: 'js', }, 'devextreme-react': { main: 'index.js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/localization/messages': { format: 'json', defaultExtension: '', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.12/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 cities = [ { name: 'London', id: '1', data: { temperature: 10, humidity: 81, pressure: 1002.1, }, }, { name: 'Berlin', id: '2', data: { temperature: 14, humidity: 58, pressure: 1008.5, }, }, { name: 'New York', id: '3', data: { temperature: 3, humidity: 89, pressure: 1016.2, }, }, { name: 'Moscow', id: '4', data: { temperature: 2, humidity: 51, pressure: 1016.5, }, }, { name: 'Bangkok', id: '5', data: { temperature: 37, humidity: 39, pressure: 1007.0, }, }, ]; export const cityLabel = { 'aria-label': 'City' };
<!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="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/23.2.5/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 { width: 90%; margin: 0 auto; } #gauge-demo .gauge-element { height: 400px; width: 33%; float: left; } .dx-selectbox { margin: 10px auto 0; width: 200px; } #gauge-demo::after { content: "."; display: block; clear: both; visibility: hidden; line-height: 0; height: 0; } .long-title h3 { font-weight: 200; font-size: 28px; text-align: center; margin-bottom: 20px; }