React Timeline Load Events from Google Calendar Example

Event data can be loaded from remote sources, like public google calendars. Through the integration plugin you can easily show events that are available in a public calendar. The integration plugin needs to be added to the download package or installed separately from a dedicated NPM package.

You will just need the CALENDAR_ID and an apiKey from google and you should be ready to roll.

In this example you can see how multiple public holiday calendars are loaded as separate resources into the timeline.

Public calendars are read-only. If you are interested in syncing private google calendars with read/write/delete access, check out this example.

This example uses the integration plugin to connect to and load events from Google Calendar and it is not available in the trial. Give the live demo a try and see how it can be configured.

Get started with the timeline

Preview in full screen

Load public Google Calendar events into a Timeline — show holiday calendars as resource rows using a Calendar ID and API key.

import { googleCalendarSync } from '@mobiscroll/calendar-integration';
import { Eventcalendar, setOptions, Toast  } from '@mobiscroll/react';
import { useCallback, useEffect, useMemo, useRef, useState } from 'react';

setOptions({
  locale:  ,
  theme: ' ',
  themeVariant: ' '
});

function App() {
  const [events, setEvents] = useState([]);
  const [isToastOpen, setToastOpen] = useState(false);
  const [toastMessage, setToastMessage] = useState('');
  const firstDay = useRef();
  const lastDay = useRef();

  const calView = useMemo(
    () => ({
      timeline: {
        type: 'month',
        eventDisplay: 'fill',
      },
    }),
    [],
  );

  const calendars = useMemo(
    () => [
      { id: 'en.french#holiday@group.v.calendar.google.com', name: 'Holidays in France', color: '#D81B60' },
      { id: 'en.german#holiday@group.v.calendar.google.com', name: 'Holidays in Germany', color: '#F4511E' },
      { id: 'en.hungarian#holiday@group.v.calendar.google.com', name: 'Holidays in Hungary', color: '#AD1457' },
      { id: 'en.indian#holiday@group.v.calendar.google.com', name: 'Holidays in India', color: '#E4C441' },
      { id: 'en.romanian#holiday@group.v.calendar.google.com', name: 'Holidays in Romania', color: '#0B8043' },
      { id: 'en.uk#holiday@group.v.calendar.google.com', name: 'Holidays in United Kingdom', color: '#3F51B5' },
      { id: 'en.usa#holiday@group.v.calendar.google.com', name: 'Holidays in United States', color: '#8E24AA' },
    ],
    [],
  );

  const calendarIds = useMemo(() => calendars.map((cal) => cal.id), [calendars]);

  const onError = useCallback((resp) => {
    setToastMessage(resp.error ? resp.error : resp.result.error.message);
    setToastOpen(true);
  }, []);

  const loadEvents = useCallback(() => {
    googleCalendarSync
      .getEvents(calendarIds, firstDay.current, lastDay.current)
      .then((resp) => {
        resp.forEach((event) => {
          event.resource = event.googleCalendarId;
        });
        setEvents(resp);
      })
      .catch(onError);
  }, [calendarIds, firstDay, lastDay, onError]);

  const handlePageLoading = useCallback(
    (args) => {
      const start = args.firstDay;
      const end = args.lastDay;

      // Calculate dates
      // (pre-load events for previous and next pages as well)
      firstDay.current = new Date(start.getFullYear(), start.getMonth() - 1, start.getDate());
      lastDay.current = new Date(end.getFullYear(), end.getMonth() + 1, end.getDate());

      loadEvents();
    },
    [loadEvents],
  );

  const handleCloseToast = useCallback(() => setToastOpen(false), []);

  useEffect(() => {
    googleCalendarSync.init({
      apiKey: '<YOUR_GOOGLE_API_KEY>',
      onInit: loadEvents,
    });
  }, [loadEvents]);

  return (
    <>
      <Eventcalendar
        clickToCreate={false}
        dragToCreate={false}
        exclusiveEndDates={true}
        resources={calendars}
        view={calView}
        data={events}
        onPageLoading={handlePageLoading}
      />
      <Toast message={toastMessage} isOpen={isToastOpen} onClose={handleCloseToast} />
    </>
  );
}

export default App;

import { googleCalendarSync } from '@mobiscroll/calendar-integration';
import {
  Eventcalendar,
  MbscCalendarEvent,
  MbscEventcalendarView,
  MbscPageLoadingEvent,
  setOptions,
  Toast ,
} from '@mobiscroll/react';
import { FC, useCallback, useEffect, useMemo, useRef, useState } from 'react';

setOptions({
  locale:  ,
  theme: ' ',
  themeVariant: ' '
});

const App: FC = () => {
  const [events, setEvents] = useState<MbscCalendarEvent[]>([]);
  const [isToastOpen, setToastOpen] = useState<boolean>(false);
  const [toastMessage, setToastMessage] = useState<string>('');
  const firstDay = useRef<Date>(null);
  const lastDay = useRef<Date>(null);

  const calView = useMemo<MbscEventcalendarView>(
    () => ({
      timeline: {
        type: 'month',
        eventDisplay: 'fill',
      },
    }),
    [],
  );

  const calendars = useMemo(
    () => [
      { id: 'en.french#holiday@group.v.calendar.google.com', name: 'Holidays in France', color: '#D81B60' },
      { id: 'en.german#holiday@group.v.calendar.google.com', name: 'Holidays in Germany', color: '#F4511E' },
      { id: 'en.hungarian#holiday@group.v.calendar.google.com', name: 'Holidays in Hungary', color: '#AD1457' },
      { id: 'en.indian#holiday@group.v.calendar.google.com', name: 'Holidays in India', color: '#E4C441' },
      { id: 'en.romanian#holiday@group.v.calendar.google.com', name: 'Holidays in Romania', color: '#0B8043' },
      { id: 'en.uk#holiday@group.v.calendar.google.com', name: 'Holidays in United Kingdom', color: '#3F51B5' },
      { id: 'en.usa#holiday@group.v.calendar.google.com', name: 'Holidays in United States', color: '#8E24AA' },
    ],
    [],
  );

  const calendarIds = useMemo(() => calendars.map((cal) => cal.id), [calendars]);

  const onError = useCallback((resp: { error?: string; result: { error: { message: string } } }) => {
    setToastMessage(resp.error ? resp.error : resp.result.error.message);
    setToastOpen(true);
  }, []);

  const loadEvents = useCallback(() => {
    googleCalendarSync
      .getEvents(calendarIds, firstDay.current!, lastDay.current!)
      .then((resp) => {
        resp.forEach((event: MbscCalendarEvent) => {
          event.resource = event.googleCalendarId;
        });
        setEvents(resp);
      })
      .catch(onError);
  }, [calendarIds, firstDay, lastDay, onError]);

  const handlePageLoading = useCallback(
    (args: MbscPageLoadingEvent) => {
      const start = args.firstDay;
      const end = args.lastDay;

      // Calculate dates
      // (pre-load events for previous and next pages as well)
      firstDay.current = new Date(start.getFullYear(), start.getMonth() - 1, start.getDate());
      lastDay.current = new Date(end.getFullYear(), end.getMonth() + 1, end.getDate());

      loadEvents();
    },
    [loadEvents],
  );

  const handleCloseToast = useCallback(() => setToastOpen(false), []);

  useEffect(() => {
    googleCalendarSync.init({
      apiKey: '<YOUR_GOOGLE_API_KEY>',
      onInit: loadEvents,
    });
  }, [loadEvents]);

  return (
    <>
      <Eventcalendar
        clickToCreate={false}
        dragToCreate={false}
        exclusiveEndDates={true}
        resources={calendars}
        view={calView}
        data={events}
        onPageLoading={handlePageLoading}
      />
      <Toast message={toastMessage} isOpen={isToastOpen} onClose={handleCloseToast} />
    </>
  );
};
export default App;

.md-google-calendar .mbsc-timeline-day {
  min-width: 150px;
}

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