How to style a header in the Flutter Date Range Picker (SfDateRangePicker)?
In the Flutter Date Range Picker, you can customize the header appearance using the headerStyle property in combination with the onViewChanged callback.
You can dynamically style the date range picker header by using DateRangePickerHeaderStyle properties within the onViewChanged callback:
void viewChanged(DateRangePickerViewChangedArgs viewChangedDetails) {
final DateTime startDate = viewChangedDetails.visibleDateRange.startDate!;
final DateTime endDate = viewChangedDetails.visibleDateRange.endDate!;
final int count = endDate.difference(startDate).inDays;
final DateTime midDate = startDate.add(Duration(days: count ~/ 2));
SchedulerBinding.instance!.addPostFrameCallback((duration) {
setState(() {
if (midDate.month % 2 == 0) {
_headerStyle = DateRangePickerHeaderStyle(
textAlign: TextAlign.center,
backgroundColor: Colors.lightGreen,
textStyle: TextStyle(
fontSize: 25,
fontStyle: FontStyle.normal,
letterSpacing: 5,
color: Colors.red,
fontWeight: FontWeight.w500));
} else {
_headerStyle = DateRangePickerHeaderStyle(
textAlign: TextAlign.center,
backgroundColor: Colors.purple,
textStyle: TextStyle(
fontSize: 25,
fontStyle: FontStyle.normal,
letterSpacing: 5,
color: Colors.orange,
fontWeight: FontWeight.w500));
}
});
});
}
Assign _headerStyle to the headerStyle property of the date range picker.
child: SfDateRangePicker( headerStyle: _headerStyle, onViewChanged: viewChanged, ),
Conclusion
I hope you enjoyed learning about how to style a header in the Flutter Date Range Picker.
You can refer to our Flutter Date Range Picker feature tour page to learn about its other groundbreaking feature representations documentation and how to quickly get started for configuration specifications. You can also explore our Flutter Date Range Picker example to understand how to create and manipulate data.
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