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How to create time table using Flutter Event Calendar
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You can create time table by adding appointments for particular days of week by using onViewChanged callback in Flutter Calendar.
In initState(), set the default values for calendar.
CalendarDataSource _dataSource = _DataSource(<Appointment>[]);
List<String> _subjectCollection = <String>[];
List<DateTime> _startTimeCollection = <DateTime>[];
List<DateTime> _endTimeCollection = <DateTime>[];
List<Color> _colorCollection = <Color>[];
List<TimeRegion> _specialTimeRegion = <TimeRegion>[];
@override
void initState() {
_getSubjectCollection();
_getStartTimeCollection();
_getEndTimeCollection();
_getColorCollection();
super.initState();
}
Using the onViewchanged callback, checks whether the visible date weekday is not falls in weekend to add appointments for week days.
void viewChanged(ViewChangedDetails viewChangedDetails) {
List<DateTime> visibleDates = viewChangedDetails.visibleDates;
List<TimeRegion> _timeRegion = <TimeRegion>[];
List<Appointment> appointments = <Appointment>[];
_dataSource.appointments!.clear();
for (int i = 0; i < visibleDates.length; i++) {
if (visibleDates[i].weekday == 6 || visibleDates[i].weekday == 7) {
continue;
}
_timeRegion.add(TimeRegion(
startTime: DateTime(visibleDates[i].year, visibleDates[i].month,
visibleDates[i].day, 13, 0, 0),
endTime: DateTime(visibleDates[i].year, visibleDates[i].month,
visibleDates[i].day, 14, 0, 0),
text: 'Break',
enablePointerInteraction: false));
SchedulerBinding.instance!.addPostFrameCallback((timeStamp) {
setState(() {
_specialTimeRegion = _timeRegion;
});
});
for (int j = 0; j < _startTimeCollection.length; j++) {
DateTime startTime = new DateTime(
visibleDates[i].year,
visibleDates[i].month,
visibleDates[i].day,
_startTimeCollection[j].hour,
_startTimeCollection[j].minute,
_startTimeCollection[j].second);
DateTime endTime = new DateTime(
visibleDates[i].year,
visibleDates[i].month,
visibleDates[i].day,
_endTimeCollection[j].hour,
_endTimeCollection[j].minute,
_endTimeCollection[j].second);
Random random = Random();
appointments.add(Appointment(
startTime: startTime,
endTime: endTime,
subject: _subjectCollection[random.nextInt(9)],
color: _colorCollection[random.nextInt(9)]));
}
}
for (int i = 0; i < appointments.length; i++) {
_dataSource.appointments!.add(appointments[i]);
}
_dataSource.notifyListeners(
CalendarDataSourceAction.reset, _dataSource.appointments!);
}
Then assign the _dataSource to dataSource property of the calendar.
child: SfCalendar( dataSource: _dataSource, view: CalendarView.week, allowedViews: [ CalendarView.day, CalendarView.week, CalendarView.workWeek, CalendarView.month, CalendarView.timelineDay, CalendarView.timelineWeek, CalendarView.timelineWorkWeek, CalendarView.timelineMonth, CalendarView.schedule ], onViewChanged: viewChanged, specialRegions: _specialTimeRegion, ),
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