Basic Properties (React)

The key properties common to all Wijmo gauge classes are: min, max, and value.

The showText property is used to show the min/max/value properties as text on the gauge.

Wijmo gauges can also be used as input controls. If you set their isReadOnly property to false, users will be able to change the value using the mouse, keyboard, or touch.

This example uses React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useState, useRef, useEffect } from 'react'; import * as wjInput from '@mescius/wijmo.react.input'; import * as wjGauge from '@mescius/wijmo.react.gauge'; import './app.css'; const comboSource = ['None', 'Value', 'MinMax', 'All']; function App() { const [min, setMin] = useState(0); const [max, setMax] = useState(100); const [step, setStep] = useState(1); const [showText, setShowText] = useState('None'); const [isReadOnly, setIsReadOnly] = useState(true); const [isAnimated, setIsAnimated] = useState(true); const valueInpRef = useRef(); const rGaugeRef = useRef(); const lGaugeRef = useRef(); const bgGaugeRef = useRef(); const props = { min, max, step, showText, isReadOnly, isAnimated, }; const valChanged = (newValue) => { if (!valueInpRef.current) { return; } valueInpRef.current.control.value = newValue; rGaugeRef.current.control.value = newValue; lGaugeRef.current.control.value = newValue; bgGaugeRef.current.control.value = newValue; }; useEffect(() => { valChanged(75); }, []); return (<div className="container-fluid"> <div className="row"> <div className="col-xs-6"> <div className="form-group"> <label htmlFor="min">min:</label> <wjInput.InputNumber id="min" step={10} value={min} valueChanged={(s) => setMin(s.value)}/> </div> <div className="form-group"> <label htmlFor="max">max:</label> <wjInput.InputNumber id="max" step={10} value={max} valueChanged={(s) => setMax(s.value)}/> </div> <div className="form-group"> <label htmlFor="value">value:</label> <wjInput.InputNumber ref={valueInpRef} id="value" step={10} valueChanged={(s) => valChanged(s.value)}/> </div> <div className="form-group"> <label htmlFor="showText">showText:</label> <wjInput.ComboBox id="showText" text={showText} itemsSource={comboSource} selectedIndexChanged={(s) => setShowText(s.selectedValue)}/> </div> <div className="form-check"> <label htmlFor="isReadOnly">isReadOnly:</label> <input id="isReadOnly" type="checkbox" className="form-check-input" checked={isReadOnly} onChange={() => setIsReadOnly(!isReadOnly)}/> </div> <div className="form-group"> <label htmlFor="step">step:</label> <wjInput.InputNumber id="step" min={1} step={1} value={step} valueChanged={(s) => setStep(s.value)}/> </div> <div className="form-check"> <label htmlFor="isAnimated">isAnimated:</label> <input id="isAnimated" type="checkbox" className="form-check-input" checked={isAnimated} onChange={() => setIsAnimated(!isAnimated)}/> </div> </div> <div className="col-xs-6"> <wjGauge.RadialGauge ref={rGaugeRef} {...props} valueChanged={(s) => valChanged(s.value)}/> <wjGauge.LinearGauge ref={lGaugeRef} {...props} valueChanged={(s) => valChanged(s.value)}/> <wjGauge.BulletGraph ref={bgGaugeRef} {...props} target={60} good={70} bad={50} valueChanged={(s) => valChanged(s.value)}/> </div> </div> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>Gauge Basics</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
label { width: 150px; text-align: right; } .container-fluid .wj-inputnumber, .container-fluid .wj-combobox { width: 140px; } .container-fluid .wj-gauge { margin: 20px auto; } .container-fluid .wj-radialgauge { height: 100px; }
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true, react: true }, meta: { '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'jszip': 'npm:jszip/dist/jszip.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 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"npm:react-use-event-hook/dist/esm/useEvent.js", }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'jsx' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);