How to use resource builder in the Flutter Calendar (SfCalendar)?
In the Flutter Calendar, add the custom widgets for resources by using the resourceHeaderBuilder property of the calendar.
STEP 1: Initialize the default values for the calendar.
final List<CalendarView> _allowedViews = <CalendarView>[
CalendarView.timelineDay,
CalendarView.timelineWeek,
CalendarView.timelineWorkWeek,
CalendarView.timelineMonth,
];
final List<String> _subjectCollection = <String>[];
final List<Color> _colorCollection = <Color>[];
List<Appointment> _shiftCollection = <Appointment>[];
final List<CalendarResource> _employeeCollection = <CalendarResource>[];
final List<String> _nameCollection = <String>[];
final List<String> _userImages=<String>[];
_DataSource? _events;
@override
void initState() {
_addResourceDetails();
_addResources();
_addAppointmentDetails();
_addAppointments();
_events = _DataSource(_shiftCollection, _employeeCollection);
super.initState();
}
STEP 2: Add the resources by using the displayName, color, id, image properties of the CalendarResource.
void _addResources() {
Random random = Random();
for (int i = 0; i < _nameCollection.length; i++) {
_employeeCollection.add(CalendarResource(
displayName: _nameCollection[i],
id: '000' + i.toString(),
color: Color.fromRGBO(
random.nextInt(255), random.nextInt(255), random.nextInt(255), 1),
image:
i < _userImages.length ? ExactAssetImage(_userImages[i]) : null
));
}
}
STEP 3: Replace the resource header view by using the resourceHeaderBuilder property of the calendar.
child: SfCalendar(
view: CalendarView.timelineWeek,
showDatePickerButton: true,
allowedViews: _allowedViews,
dataSource: _events,
resourceViewHeaderBuilder: resourceBuilder,
),
Widget resourceBuilder(
BuildContext context, ResourceViewHeaderDetails details) {
if (details.resource.image != null) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
children: [
CircleAvatar(backgroundImage:details.resource.image,backgroundColor: details.resource.color),
Center(child: Text(details.resource.displayName,textAlign: TextAlign.center,)),
],
);
}
else {
return Container(
color: details.resource.color,
child: Text(details.resource.displayName),
);
}
}
|
Conclusion
I hope you enjoyed learning about how to use resource builder in the Flutter Calendar (SfCalendar).
You can refer to our Flutter Calendar feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our Flutter Calendar example to understand how to create and manipulate data.
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