Linear Gauges (React)

Linear gauges display a metric as a percentage of the length of a linear scale. They can be horizontal or vertical, depending on the setting of the direction property.

Use the controls below to see the effect of the main LinearGauge properties:

This example uses React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useRef, useState } from 'react'; import useEvent from 'react-use-event-hook'; import * as wjInput from '@mescius/wijmo.react.input'; import * as wjGauge from '@mescius/wijmo.react.gauge'; import './app.css'; const directionSource = ['Left', 'Right', 'Up', 'Down']; function App() { const [direction, setDirection] = useState('Right'); const comboBoxRef = useRef(null); const linearGaugeRef = useRef(null); const valueInputNumberRef = useRef(null); const valChanged = (newValue) => { if (!linearGaugeRef.current) { return; } linearGaugeRef.current.value = newValue; valueInputNumberRef.current.value = newValue; }; const handleValueChange = useEvent((type) => { if (type === "valueInputNumber") { valChanged(valueInputNumberRef.current.value); } else if (type === "valueLinearGauge") { valChanged(linearGaugeRef.current.value); } }); const setDirectionValue = () => { const text = comboBoxRef.current.text; let el = linearGaugeRef.current.hostElement.style; setDirection(text); switch (text) { case 'Left': case 'Right': el.height = '2em'; el.width = '100%'; break; case 'Up': case 'Down': el.height = '100%'; el.width = '2em'; break; } }; return (<div className="container-fluid"> <div className="row"> <div className="col-xs-6"> <div className="form-group"> <label htmlFor="value">value:</label> <wjInput.InputNumber id="value" min={0} max={100} step={5} initialized={(control) => valueInputNumberRef.current = control} valueChanged={() => handleValueChange("valueInputNumber")}/> </div> <div className="form-group"> <label htmlFor="direction">direction:</label> <wjInput.ComboBox id="direction" itemsSource={directionSource} text={direction} initialized={(control) => comboBoxRef.current = control} selectedIndexChanged={setDirectionValue}/> </div> </div> <div className="col-xs-6"> <div className="gauge-holder"> <wjGauge.LinearGauge isReadOnly={false} min={0} max={100} step={5} showRanges={false} direction={direction} valueChanged={() => handleValueChange("valueLinearGauge")} initialized={(control) => { linearGaugeRef.current = control; valChanged(75); }}> <wjGauge.Range min={0} max={33} color="red"></wjGauge.Range> <wjGauge.Range min={33} max={66} color="yellow"></wjGauge.Range> <wjGauge.Range min={66} max={100} color="green"></wjGauge.Range> </wjGauge.LinearGauge> </div> </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>Linear Gauges</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>
.container-fluid .gauge-holder { display: flex; width: 80%; height: 200px; box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23); padding: 12px; } .container-fluid .gauge-holder .wj-lineargauge { height: 2em; width: 100%; } .container-fluid .wj-gauge { width: 100%; height: 100%; margin: auto auto; } .wj-combobox, .wj-inputnumber { width: 120px; } label { width: 100px; text-align: right; }
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