React Scheduler - Current Time Indicator

The Scheduler indicates the current time if you enable the showCurrentTimeIndicator property. Use the indicatorUpdateInterval property to specify how frequently the indicator should change its position.

You can also shade the timetable up to the current time. To enable this feature, set the shadeUntilCurrentTime property to true.

In this example, you can use the controls under the Scheduler to change the above mentioned properties at runtime.

TS JS

Backend API

import React, { useCallback, useState } from 'react'; import Scheduler, { Resource, type SchedulerTypes } from 'devextreme-react/scheduler'; import { Switch, type SwitchTypes } from 'devextreme-react/switch'; import { NumberBox, type NumberBoxTypes } from 'devextreme-react/number-box'; import { data, moviesData } from './data.ts'; import AppointmentTemplate from './AppointmentTemplate.tsx'; const currentDate = new Date(); const views: SchedulerTypes.ViewType[] = ['week', 'timelineWeek']; const intervalLabel = { 'aria-label': 'Interval' }; const onContentReady = (e: SchedulerTypes.ContentReadyEvent) => { e.component.scrollTo(new Date()); }; const onAppointmentClick = (e: SchedulerTypes.AppointmentClickEvent) => { e.cancel = true; }; const onAppointmentDblClick = (e: SchedulerTypes.AppointmentDblClickEvent) => { e.cancel = true; }; const App = () => { const [showCurrentTimeIndicator, setShowCurrentTimeIndicator] = useState(true); const [shadeUntilCurrentTime, setShadeUntilCurrentTime] = useState(true); const [updateInterval, setUpdateInterval] = useState(10); const onShowCurrentTimeIndicatorChanged = useCallback((e: SwitchTypes.ValueChangedEvent) => { setShowCurrentTimeIndicator(e.value); }, []); const onShadeUntilCurrentTimeChanged = useCallback((e: SwitchTypes.ValueChangedEvent) => { setShadeUntilCurrentTime(e.value); }, []); const onUpdateIntervalChanged = useCallback((e: NumberBoxTypes.ValueChangedEvent) => { setUpdateInterval(e.value); }, []); return ( <React.Fragment> <Scheduler dataSource={data} views={views} defaultCurrentView="week" showCurrentTimeIndicator={showCurrentTimeIndicator} indicatorUpdateInterval={updateInterval * 1000} showAllDayPanel={false} shadeUntilCurrentTime={shadeUntilCurrentTime} defaultCurrentDate={currentDate} editing={false} height={600} appointmentComponent={AppointmentTemplate} onContentReady={onContentReady} onAppointmentClick={onAppointmentClick} onAppointmentDblClick={onAppointmentDblClick} > <Resource dataSource={moviesData} fieldExpr="movieId" /> </Scheduler> <div className="options"> <div className="column"> <div className="option"> <div className="label">Current time indicator </div> {' '} <div className="value"> <Switch id="show-indicator" value={showCurrentTimeIndicator} onValueChanged={onShowCurrentTimeIndicatorChanged} /> </div> </div> <div className="option"> <div className="label">Shading until current time </div> {' '} <div className="value"> <Switch id="allow-shading" value={shadeUntilCurrentTime} onValueChanged={onShadeUntilCurrentTimeChanged} /> </div> </div> </div> {' '} <div className="column"> <div className="option"> <div className="label">Update position in </div> {' '} <div className="value"> <NumberBox min={1} max={1200} value={updateInterval} step={10} showSpinButtons={true} width={100} format="#0 s" inputAttr={intervalLabel} onValueChanged={onUpdateIntervalChanged} /> </div> </div> </div> </div> </React.Fragment> ); }; export default App;

import React, { useCallback, useState } from 'react'; import Scheduler, { Resource } from 'devextreme-react/scheduler'; import { Switch } from 'devextreme-react/switch'; import { NumberBox } from 'devextreme-react/number-box'; import { data, moviesData } from './data.js'; import AppointmentTemplate from './AppointmentTemplate.js'; const currentDate = new Date(); const views = ['week', 'timelineWeek']; const intervalLabel = { 'aria-label': 'Interval' }; const onContentReady = (e) => { e.component.scrollTo(new Date()); }; const onAppointmentClick = (e) => { e.cancel = true; }; const onAppointmentDblClick = (e) => { e.cancel = true; }; const App = () => { const [showCurrentTimeIndicator, setShowCurrentTimeIndicator] = useState(true); const [shadeUntilCurrentTime, setShadeUntilCurrentTime] = useState(true); const [updateInterval, setUpdateInterval] = useState(10); const onShowCurrentTimeIndicatorChanged = useCallback((e) => { setShowCurrentTimeIndicator(e.value); }, []); const onShadeUntilCurrentTimeChanged = useCallback((e) => { setShadeUntilCurrentTime(e.value); }, []); const onUpdateIntervalChanged = useCallback((e) => { setUpdateInterval(e.value); }, []); return ( <React.Fragment> <Scheduler dataSource={data} views={views} defaultCurrentView="week" showCurrentTimeIndicator={showCurrentTimeIndicator} indicatorUpdateInterval={updateInterval * 1000} showAllDayPanel={false} shadeUntilCurrentTime={shadeUntilCurrentTime} defaultCurrentDate={currentDate} editing={false} height={600} appointmentComponent={AppointmentTemplate} onContentReady={onContentReady} onAppointmentClick={onAppointmentClick} onAppointmentDblClick={onAppointmentDblClick} > <Resource dataSource={moviesData} fieldExpr="movieId" /> </Scheduler> <div className="options"> <div className="column"> <div className="option"> <div className="label">Current time indicator </div>{' '} <div className="value"> <Switch id="show-indicator" value={showCurrentTimeIndicator} onValueChanged={onShowCurrentTimeIndicatorChanged} /> </div> </div> <div className="option"> <div className="label">Shading until current time </div>{' '} <div className="value"> <Switch id="allow-shading" value={shadeUntilCurrentTime} onValueChanged={onShadeUntilCurrentTimeChanged} /> </div> </div> </div>{' '} <div className="column"> <div className="option"> <div className="label">Update position in </div>{' '} <div className="value"> <NumberBox min={1} max={1200} value={updateInterval} step={10} showSpinButtons={true} width={100} format="#0 s" inputAttr={intervalLabel} onValueChanged={onUpdateIntervalChanged} /> </div> </div> </div> </div> </React.Fragment> ); }; export default App;

import React from 'react'; import { query as Query } from 'devextreme-react/common/data'; import { type SchedulerTypes } from 'devextreme-react/scheduler'; import { moviesData } from './data.ts'; type AppointmentTemplateProps = { data: { appointmentData: SchedulerTypes.Appointment; }; }; const getMovieById = (id) => Query(moviesData).filter(['id', id]).toArray()[0]; const AppointmentTemplate = (props: AppointmentTemplateProps) => { const { appointmentData } = props.data; const movieInfo = getMovieById(appointmentData.movieId) || {}; return ( <div className="movie"> <img src={movieInfo.image} alt={movieInfo.text + ' poster'} /> <div className="movie-text">{movieInfo.text}</div> </div> ); }; export default AppointmentTemplate;

import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.tsx'; ReactDOM.render( <App />, document.getElementById('app'), );

import { SchedulerTypes } from 'devextreme-react/scheduler'; type Appointment = SchedulerTypes.Appointment & { movieId: number }; type Resource = { id: number; text: string; image: string; }; export const today = new Date(); today.setHours(0, 0, 0, 0); today.setDate(today.getDate() - today.getDay() + 3); export const data: Appointment[] = [ { movieId: 1, startDate: new Date(today.getTime() - 113.5 * 3600000), endDate: new Date(today.getTime() - 111.5 * 3600000), recurrenceRule: 'FREQ=HOURLY;INTERVAL=15;COUNT=15', }, { movieId: 2, startDate: new Date(today.getTime() - 110.5 * 3600000), endDate: new Date(today.getTime() - 108.5 * 3600000), recurrenceRule: 'FREQ=HOURLY;INTERVAL=15;COUNT=15', }, { movieId: 3, startDate: new Date(today.getTime() - 106.5 * 3600000), endDate: new Date(today.getTime() - 104.5 * 3600000), recurrenceRule: 'FREQ=HOURLY;INTERVAL=15;COUNT=15', }, { movieId: 4, startDate: new Date(today.getTime() - 104 * 3600000), endDate: new Date(today.getTime() - 102 * 3600000), recurrenceRule: 'FREQ=HOURLY;INTERVAL=15;COUNT=15', }, { movieId: 5, startDate: new Date(today.getTime() - 101 * 3600000), endDate: new Date(today.getTime() - 99 * 3600000), recurrenceRule: 'FREQ=HOURLY;INTERVAL=15;COUNT=15', }, ]; export const moviesData: Resource[] = [{ id: 1, text: 'His Girl Friday', image: '../../../../images/movies/HisGirlFriday.jpg', }, { id: 2, text: 'Royal Wedding', image: '../../../../images/movies/RoyalWedding.jpg', }, { id: 3, text: 'A Star Is Born', image: '../../../../images/movies/AStartIsBorn.jpg', }, { id: 4, text: 'The Screaming Skull', image: '../../../../images/movies/ScreamingSkull.jpg', }, { id: 5, text: 'It\'s a Wonderful Life', image: '../../../../images/movies/ItsAWonderfulLife.jpg', }];

import React from 'react'; import { query as Query } from 'devextreme-react/common/data'; import { moviesData } from './data.js'; const getMovieById = (id) => Query(moviesData).filter(['id', id]).toArray()[0]; const AppointmentTemplate = (props) => { const { appointmentData } = props.data; const movieInfo = getMovieById(appointmentData.movieId) || {}; return ( <div className="movie"> <img src={movieInfo.image} alt={`${movieInfo.text} poster`} /> <div className="movie-text">{movieInfo.text}</div> </div> ); }; export default AppointmentTemplate;

import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render(<App />, document.getElementById('app'));

export const today = new Date(); today.setHours(0, 0, 0, 0); today.setDate(today.getDate() - today.getDay() + 3); export const data = [ { movieId: 1, startDate: new Date(today.getTime() - 113.5 * 3600000), endDate: new Date(today.getTime() - 111.5 * 3600000), recurrenceRule: 'FREQ=HOURLY;INTERVAL=15;COUNT=15', }, { movieId: 2, startDate: new Date(today.getTime() - 110.5 * 3600000), endDate: new Date(today.getTime() - 108.5 * 3600000), recurrenceRule: 'FREQ=HOURLY;INTERVAL=15;COUNT=15', }, { movieId: 3, startDate: new Date(today.getTime() - 106.5 * 3600000), endDate: new Date(today.getTime() - 104.5 * 3600000), recurrenceRule: 'FREQ=HOURLY;INTERVAL=15;COUNT=15', }, { movieId: 4, startDate: new Date(today.getTime() - 104 * 3600000), endDate: new Date(today.getTime() - 102 * 3600000), recurrenceRule: 'FREQ=HOURLY;INTERVAL=15;COUNT=15', }, { movieId: 5, startDate: new Date(today.getTime() - 101 * 3600000), endDate: new Date(today.getTime() - 99 * 3600000), recurrenceRule: 'FREQ=HOURLY;INTERVAL=15;COUNT=15', }, ]; export const moviesData = [ { id: 1, text: 'His Girl Friday', image: '../../../../images/movies/HisGirlFriday.jpg', }, { id: 2, text: 'Royal Wedding', image: '../../../../images/movies/RoyalWedding.jpg', }, { id: 3, text: 'A Star Is Born', image: '../../../../images/movies/AStartIsBorn.jpg', }, { id: 4, text: 'The Screaming Skull', image: '../../../../images/movies/ScreamingSkull.jpg', }, { id: 5, text: "It's a Wonderful Life", image: '../../../../images/movies/ItsAWonderfulLife.jpg', }, ];

<!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="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/25.1.7/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/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>

.dx-scheduler-appointment { color: #000; font-weight: 500; background-color: #e4e4e4; } .dx-scheduler-appointment-recurrence .dx-scheduler-appointment-content { padding: 5px 0 5px 7px; } .options { background-color: rgba(191, 191, 191, 0.15); margin-top: 20px; display: flex; align-items: flex-start; } .column { width: 40%; display: inline-block; margin: 15px 3%; text-align: left; vertical-align: top; } .option { padding: 5px 0; display: flex; align-items: center; } .label, .value { display: inline-block; vertical-align: middle; } .label { width: 180px; } .value { width: 30%; } .movie img { height: 70px; } .movie-text { font-size: 90%; white-space: normal; } #allow-shading, #show-indicator { height: 36px; }