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Variable Number of Bars

This demo shows how to use the API of the BarGauge to change the number of indicated values at runtime. For this purpose, an array of new values is passed as the parameter of the value method.

Backend API
import React, { useCallback, useState } from 'react'; import { BarGauge, Label } from 'devextreme-react/bar-gauge'; import { CheckBox, CheckBoxTypes } from 'devextreme-react/check-box'; import { products } from './data.ts'; const format = { type: 'fixedPoint', precision: 0, }; function App() { const [productsActivity, setProductsActivity] = useState(products.map((p) => p.active)); const [values, setValues] = useState(products.map((p) => p.count)); const getValueChangedHandler = useCallback((productIndex: string | number) => (e: CheckBoxTypes.ValueChangedEvent) => { const updatedProductsActivity = [...productsActivity]; updatedProductsActivity[productIndex] = e.value; setProductsActivity(updatedProductsActivity); setValues( products .map((p, i) => (updatedProductsActivity[i] ? p.count : null)) .filter((c) => c !== null), ); }, [productsActivity, setProductsActivity, setValues]); return ( <div> <div className="long-title"> <h3>Sampling by Goods</h3> </div> <div id="gauge-demo"> <BarGauge id="gauge" startValue={0} endValue={50} values={values}> <Label format={format} /> </BarGauge> <div id="panel"> {productsActivity.map((p, i) => ( <CheckBox key={i} text={products[i].name} value={p} onValueChanged={getValueChangedHandler(i)} ></CheckBox> ))} </div> </div> </div> ); } export default App;
import React, { useCallback, useState } from 'react'; import { BarGauge, Label } from 'devextreme-react/bar-gauge'; import { CheckBox } from 'devextreme-react/check-box'; import { products } from './data.js'; const format = { type: 'fixedPoint', precision: 0, }; function App() { const [productsActivity, setProductsActivity] = useState(products.map((p) => p.active)); const [values, setValues] = useState(products.map((p) => p.count)); const getValueChangedHandler = useCallback( (productIndex) => (e) => { const updatedProductsActivity = [...productsActivity]; updatedProductsActivity[productIndex] = e.value; setProductsActivity(updatedProductsActivity); setValues( products .map((p, i) => (updatedProductsActivity[i] ? p.count : null)) .filter((c) => c !== null), ); }, [productsActivity, setProductsActivity, setValues], ); return ( <div> <div className="long-title"> <h3>Sampling by Goods</h3> </div> <div id="gauge-demo"> <BarGauge id="gauge" startValue={0} endValue={50} values={values} > <Label format={format} /> </BarGauge> <div id="panel"> {productsActivity.map((p, i) => ( <CheckBox key={i} text={products[i].name} value={p} onValueChanged={getValueChangedHandler(i)} ></CheckBox> ))} </div> </div> </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 products = [{ name: 'Hammers', count: 41, active: true, }, { name: 'Shovels', count: 32, active: true, }, { name: 'Ladders', count: 13, active: true, }, { name: 'Watering cans', count: 48, active: true, }, { name: 'Screwdrivers', count: 24, active: true, }, { name: 'Nail pullers', count: 8, active: true, }, { name: 'Drills', count: 19, active: true, }];
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@24.1.3/cjs', 'devextreme-react': 'npm:devextreme-react@24.1.3/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@2.2.8/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 products = [ { name: 'Hammers', count: 41, active: true, }, { name: 'Shovels', count: 32, active: true, }, { name: 'Ladders', count: 13, active: true, }, { name: 'Watering cans', count: 48, active: true, }, { name: 'Screwdrivers', count: 24, active: true, }, { name: 'Nail pullers', count: 8, active: true, }, { name: 'Drills', count: 19, active: true, }, ];
<!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/24.1.3/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%; margin-top: 20px; float: left; } #panel { width: 150px; text-align: left; margin-top: 20px; float: left; } .dx-checkbox { margin-bottom: 10px; display: block; } .long-title h3 { font-weight: 200; font-size: 28px; text-align: center; margin-bottom: 20px; }