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How to add custom header and view header in the Flutter Calendar?
5 mins read
In the Flutter Event Calendar, you can customize the header and view header by hiding the default headers and using Flutter's Container, Row, and Column widgets.
STEP 1: Set the `HeaderHeight` and `ViewHeaderHeight` properties to `0` to hide the default headers. Please find the following image for the calendar without headers.
@override
Widget build(BuildContext context) {
Expanded(
child: SfCalendar(
view: CalendarView.week,
headerHeight: 0,
viewHeaderHeight: 0,
),
);
}
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STEP 2: Add a Container widget for the header customization.
Container( color: Color(0xFF381460), width: width, height: 40, child: Text(_headerText!, textAlign: TextAlign.center, style: TextStyle(fontSize: 25, color: Colors.white)), ),
STEP 3: Add a Row widget with multiple Containers for the day names in the view header.
Row(
children: <Widget>[
Container(
color: Color(0xFFa278b5),
width: cellWidth,
child: Text(''),
),
Container(
color: Color(0xFFa278b5),
width: cellWidth,
child: Text(_viewHeaderText!, textAlign: TextAlign.center,
style: TextStyle(color: Colors.white))),
Container(
color: Color(0xFFa278b5),
width: cellWidth,
child: Text(_viewHeaderText1!, textAlign: TextAlign.center, style: TextStyle(color: Colors.white)),
),
Container(
color: Color(0xFFa278b5),
width: cellWidth,
child: Text(_viewHeaderText2!, textAlign: TextAlign.center, style: TextStyle(color: Colors.white)),
),
Container(
color: Color(0xFFa278b5),
width: cellWidth,
child: Text(_viewHeaderText3!, textAlign: TextAlign.center, style: TextStyle(color: Colors.white)),
),
Container(
color: Color(0xFFa278b5),
width: cellWidth,
child: Text(_viewHeaderText4!, textAlign: TextAlign.center, style: TextStyle(color: Colors.white)),
),
Container(
color: Color(0xFFa278b5),
width: cellWidth,
child: Text(_viewHeaderText5!, textAlign: TextAlign.center,style: TextStyle(color: Colors.white)),
),
Container(
color: Color(0xFFa278b5),
width: cellWidth,
child: Text(_viewHeaderText6!, textAlign: TextAlign.center,style: TextStyle(color: Colors.white)),
),
],
),
STEP 4: Add another Row widget with Containers for displaying dates in the view header.
Row(
children: <Widget>[
Container(
color: Color(0xFFf6c3e5),
width: cellWidth,
height: 30,
child: Text(""),
),
Container(
color: Color(0xFFf6c3e5),
width: cellWidth,
height: 30,
child: Text(
_dateText!,
textAlign: TextAlign.center,
style: TextStyle(fontSize: 25),
),
),
Container(
color: Color(0xFFf6c3e5),
width: cellWidth,
height: 30,
child: Text(
_dateText1!,
textAlign: TextAlign.center,
style: TextStyle(fontSize: 25),
),
),
Container(
color: Color(0xFFf6c3e5),
width: cellWidth,
height: 30,
child: Text(
_dateText2!,
textAlign: TextAlign.center,
style: TextStyle(fontSize: 25),
),
),
Container(
color: Color(0xFFf6c3e5),
width: cellWidth,
height: 30,
child: Text(
_dateText3!,
textAlign: TextAlign.center,
style: TextStyle(fontSize: 25),
),
),
Container(
color: Color(0xFFf6c3e5),
width: cellWidth,
height: 30,
child: Text(
_dateText4!,
textAlign: TextAlign.center,
style: TextStyle(fontSize: 25),
),
),
Container(
color: Color(0xFFf6c3e5),
width: cellWidth,
height: 30,
child: Text(_dateText5!,
textAlign: TextAlign.center,
style: TextStyle(fontSize: 25)),
),
Container(
color: Color(0xFFf6c3e5),
width: cellWidth,
height: 30,
child: Text(_dateText6!,
textAlign: TextAlign.center,
style: TextStyle(fontSize: 25)),
),
],
),
STEP 5: Add the Expanded widget with the SfCalendar and implement the `OnViewChanged` event to get the visible dates and using this you can assign the date values to the headers and view headers.
Expanded(
child: SfCalendar(
headerHeight: 0,
viewHeaderHeight: 0,
controller: _controller,
view: CalendarView.week,
onViewChanged: (ViewChangedDetails viewChangedDetails) {
if (_controller.view == CalendarView.week) {
_headerText = DateFormat('MMMM yyyy')
.format(viewChangedDetails
.visibleDates[viewChangedDetails.visibleDates.length ~/ 2])
.toString();
_viewHeaderText = DateFormat('EEE')
.format(viewChangedDetails.visibleDates[0])
.toString();
_viewHeaderText1 = DateFormat('EEE')
.format(viewChangedDetails.visibleDates[1])
.toString();
_viewHeaderText2 = DateFormat('EEE')
.format(viewChangedDetails.visibleDates[2])
.toString();
_viewHeaderText3 = DateFormat('EEE')
.format(viewChangedDetails.visibleDates[3])
.toString();
_viewHeaderText4 = DateFormat('EEE')
.format(viewChangedDetails.visibleDates[4])
.toString();
_viewHeaderText5 = DateFormat('EEE')
.format(viewChangedDetails.visibleDates[5])
.toString();
_viewHeaderText6 = DateFormat('EEE')
.format(viewChangedDetails.visibleDates[6])
.toString();
_dateText = DateFormat('dd')
.format(viewChangedDetails.visibleDates[0])
.toString();
_dateText1 = DateFormat('dd')
.format(viewChangedDetails.visibleDates[1])
.toString();
_dateText2 = DateFormat('dd')
.format(viewChangedDetails.visibleDates[2])
.toString();
_dateText3 = DateFormat('dd')
.format(viewChangedDetails.visibleDates[3])
.toString();
_dateText4 = DateFormat('dd')
.format(viewChangedDetails.visibleDates[4])
.toString();
_dateText5 = DateFormat('dd')
.format(viewChangedDetails.visibleDates[5])
.toString();
_dateText6 = DateFormat('dd')
.format(viewChangedDetails.visibleDates[6])
.toString();
}
if (viewChangedDetails.visibleDates[viewChangedDetails.visibleDates.length~/2].day % 2 == 0) {
icon1 = Icon(
Icons.wb_cloudy,
color: Colors.grey,
);
icon2 = Icon(
Icons.wb_sunny,
color: Colors.amber,
);
icon3 = Icon(
Icons.wb_incandescent,
color: Color(0xFF0ba0000),
);
icon4 = Icon(
Icons.wb_auto,
color: Colors.orange,
);
icon5 = Icon(Icons.wb_iridescent, color: Color(0xFF0253e35));
icon6 = Icon(
Icons.wb_sunny,
color: Colors.amber,
);
icon7 = Icon(
Icons.wb_incandescent,
color: Color(0xFF0ba0000),
);
} else if (viewChangedDetails.visibleDates[viewChangedDetails.visibleDates.length~/2].day % 5 == 0) {
icon1 = Icon(
Icons.wb_sunny,
color: Colors.amber,
);
icon2 = Icon(
Icons.wb_cloudy,
color: Colors.grey,
);
icon3 = Icon(
Icons.wb_sunny,
color: Colors.amber,
);
icon4 = Icon(Icons.wb_iridescent, color: Color(0xFF0253e35));
icon5 = Icon(
Icons.wb_incandescent,
color: Color(0xFF0ba0000),
);
icon6 = Icon(
Icons.wb_auto,
color: Colors.orange,
);
icon7 = Icon(
Icons.wb_cloudy,
color: Colors.grey,
);
} else if (viewChangedDetails.visibleDates[viewChangedDetails.visibleDates.length~/2].day % 4 == 0) {
icon1 = Icon(
Icons.wb_cloudy,
color: Colors.grey,
);
icon2 = Icon(Icons.wb_incandescent);
icon3 = Icon(
Icons.wb_auto,
color: Colors.orange,
);
icon4 = Icon(Icons.wb_iridescent, color: Color(0xFF0253e35));
icon5 = Icon(
Icons.wb_sunny,
color: Colors.yellow,
);
icon6 = Icon(
Icons.wb_cloudy,
color: Colors.grey,
);
icon7 = Icon(
Icons.wb_sunny,
color: Colors.yellow,
);
} else if (viewChangedDetails.visibleDates[viewChangedDetails.visibleDates.length~/2].day % 3 == 0) {
icon1 = Icon(
Icons.wb_sunny,
color: Colors.yellow,
);
icon2 = Icon(Icons.wb_iridescent, color: Color(0xFF0253e35));
icon3 = Icon(
Icons.wb_incandescent,
color: Color(0xFF0ba0000),
);
icon4 = Icon(
Icons.wb_sunny,
color: Colors.amber,
);
icon5 = Icon(
Icons.wb_auto,
color: Colors.orange,
);
icon6 = Icon(
Icons.wb_auto,
color: Colors.orange,
);
icon7 = Icon(
Icons.wb_cloudy,
color: Colors.grey,
);
} else {
icon1 = Icon(
Icons.wb_sunny,
color: Colors.amber,
);
icon2 = Icon(
Icons.wb_iridescent,
color: Color(0xFF0253e35),
);
icon3 = Icon(
Icons.wb_sunny,
color: Colors.amber,
);
icon4 = Icon(
Icons.wb_cloudy,
color: Colors.grey,
);
icon5 = Icon(Icons.wb_iridescent, color: Color(0xFF0253e35));
icon6 = Icon(
Icons.wb_incandescent,
color: Color(0xFF0ba0000),
);
icon7 = Icon(
Icons.wb_auto,
color: Colors.orange,
);
}
SchedulerBinding.instance!.addPostFrameCallback((duration) {
setState(() {});
});
},
)
),
Note:
The addPostFrameCallback method is called after the widget's build() method is completed.
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Conclusion
I hope you enjoyed learning about how to add custom header and view header in the Flutter Calendar.
You can refer to our Flutter Calendar 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.
For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion®, you can try our 30-day free trial to check out our other controls.
If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums, Direct-Trac, or feedback portal. We are always happy to assist you!
