How to update blackout dates in the Flutter Date Range Picker?
In the Flutter Date Range Picker, you can update the blackoutDates by using the onViewChanged callback of the date picker.
Inside the state, set the default values for picker.
List<DateTime> _blackoutDates = <DateTime>[];
Using the onViewChanged callback, add first 5 visible dates to the _blackoutDateCollection and assign it _blackoutDates variable.
void viewChanged(DateRangePickerViewChangedArgs args) {
List<DateTime> _blackoutDateCollection = <DateTime>[];
final DateTime visibleStartDate = args.visibleDateRange.startDate!;
_blackoutDateCollection.add(visibleStartDate);
_blackoutDateCollection
.add(visibleStartDate.add(Duration(days: 1)));
_blackoutDateCollection
.add(visibleStartDate.add(Duration(days: 2)));
_blackoutDateCollection
.add(visibleStartDate.add(Duration(days: 3)));
_blackoutDateCollection
.add(visibleStartDate.add(Duration(days: 4)));
SchedulerBinding.instance!.addPostFrameCallback((timeStamp) {
setState(() {
_blackoutDates = _blackoutDateCollection;
});
});
}
Assign _blackoutDates to the blackoutDates property of the DateRangePickerMonthViewSettings.
child: SfDateRangePicker( selectionMode: DateRangePickerSelectionMode.single, monthViewSettings: DateRangePickerMonthViewSettings( blackoutDates: _blackoutDates), monthCellStyle: DateRangePickerMonthCellStyle(blackoutDateTextStyle: TextStyle( color: Colors.red, decoration: TextDecoration.lineThrough), ), onViewChanged: viewChanged, )
Conclusion
I hope you enjoyed learning about how to update blackout dates in the Flutter Date Range Picker.
You can refer to our Flutter Date Range Picker feature tour page to know about its other groundbreaking feature representations. You can also explore our documentation to understand how to create and manipulate data.
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