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Progress Bar

Progress Bar

Documentation

The ProgressBar is a widget that shows current progress.

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import React from 'react'; import { Button } from 'devextreme-react/button'; import { ProgressBar } from 'devextreme-react/progress-bar'; const maxValue = 10; function formatTime(value) { return `00:00:${ (`0${ value}`).slice(-2)}`; } function statusFormat(value) { return `Loading: ${ value * 100 }%`; } let intervalId; class App extends React.Component { constructor(props) { super(props); this.state = { seconds: maxValue, buttonText: 'Start progress', inProgress: false }; this.onButtonClick = this.onButtonClick.bind(this); this.timer = this.timer.bind(this); } render() { return ( <div className={'form'}> <Button id={'progress-button'} text={this.state.buttonText} width={200} onClick={this.onButtonClick} /> <div className={'progress-info'}> Time left {formatTime(this.state.seconds)} </div> <ProgressBar id={'progress-bar-status'} className={this.state.seconds == 0 ? 'complete' : '' } width={'90%'} min={0} max={maxValue} statusFormat={statusFormat} value={maxValue - this.state.seconds} /> </div> ); } onButtonClick() { const state = { inProgress: !this.state.inProgress }; if (this.state.inProgress) { state.buttonText = 'Continue progress'; clearInterval(intervalId); } else { state.buttonText = 'Stop progress'; if (this.state.seconds === 0) { state.seconds = maxValue; } intervalId = setInterval(() => this.timer(), 1000); } this.setState(state); } timer() { const state = { seconds: this.state.seconds - 1 }; if (state.seconds == 0) { state.buttonText = 'Restart progress'; state.inProgress = !this.state.inProgress; clearInterval(intervalId); } this.setState(state); } } export default App;
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render( <App />, document.getElementById('app') );
<!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="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.3/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://unpkg.com/core-js@2.4.1/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.js'); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>
.form { padding: 20% 0; text-align: center; } #progress-button { margin-bottom: 20px; } #progress-bar-status { display: inline-block; } .complete .dx-progressbar-range { background-color: green; }
System.config({ transpiler: 'plugin-babel', paths: { 'npm:': 'https://unpkg.com/' }, defaultExtension: 'js', map: { 'react': 'npm:react@16/umd/react.development.js', 'react-dom': 'npm:react-dom@16/umd/react-dom.development.js', 'prop-types': 'npm:prop-types/prop-types.js', 'devextreme': 'npm:devextreme@19.2', 'devextreme-react': 'npm:devextreme-react@19.2', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.7/dist/quill.js', 'devexpress-diagram': 'npm:devexpress-diagram', 'devexpress-gantt': 'npm:devexpress-gantt', // SystemJS plugins 'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js' }, packages: { 'devextreme': { defaultExtension: 'js' }, 'devextreme-react': { main: 'index.js' } }, babelOptions: { sourceMaps: false, stage0: true, react: true } });