How to highlight the tapped view header in the Flutter Calendar?
In the Flutter Calendar, you can highlight the selected view header date and day by hiding the default headers and adding the custom widgets.
STEP 1: In initState(), set the default values for calendar.
String? _headerText = 'Header'; double? _width = 0.0, _cellWidth = 0.0; List<String>? _dates = <String>['1', '2', '3', '4', '5', '6', '7'], _days = <String>['SUN', 'MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT']; bool? _selected = false; int? _selectedIndex;
STEP 2: Use the onViewChanged callback to retrieve the visible dates and update the dates to the corresponding header and view header texts.
child: SfCalendar(
headerHeight: 0,
viewHeaderHeight: 0,
view: CalendarView.week,
onViewChanged: (ViewChangedDetails viewChangedDetails) {
SchedulerBinding.instance!.addPostFrameCallback((duration) {
for (int i = 0;
i < viewChangedDetails.visibleDates.length;
i++) {
setState(() {
_dates![i] = DateFormat('dd')
.format(viewChangedDetails.visibleDates[i])
.toString();
_headerText = DateFormat('MMMM yyyy')
.format(viewChangedDetails.visibleDates[
viewChangedDetails.visibleDates.length ~/ 2])
.toString();
});
}
});
},
),
STEP 3: Use the ListView.builder widget to display header text with a GestureDetector. Highlight the header's day and date text based on the selected index.
Container(
color: Color(0xFF381460),
width: _width,
height: _cellWidth,
child: Center(
child: Text(_headerText!,
textAlign: TextAlign.center,
style: TextStyle(fontSize: 25, color: Colors.white)),
),
),
Padding(
padding: EdgeInsets.only(
left: _cellWidth!,
),
child: SizedBox(
height: _cellWidth,
child: ListView.builder(
shrinkWrap: true,
itemCount: _days!.length,
scrollDirection: Axis.horizontal,
itemBuilder: (BuildContext context, int index) {
return GestureDetector(
child: Container(
child: Column(
children: [
Container(
height: _cellWidth,
child: Center(
child: Text(
_days![index],
style: TextStyle(
color: _selected! && _selectedIndex == index
? Colors.orange
: Colors.black,
),
textAlign: TextAlign.center,
),
),
width: _cellWidth,
),
],
),
),
);
}),
),
),
Padding(
padding: EdgeInsets.only(left: _cellWidth!),
child: SizedBox(
height: _cellWidth! / 2,
child: ListView.builder(
shrinkWrap: true,
itemCount: _dates!.length,
scrollDirection: Axis.horizontal,
itemBuilder: (BuildContext context, int index) {
return GestureDetector(
onTap: () {
setState(() {
_selected = true;
_selectedIndex = index;
});
},
child: Container(
child: Column(
children: [
Container(
child: Text(
_dates![index],
style: TextStyle(color: Colors.black),
textAlign: TextAlign.center,
),
width: _cellWidth,
decoration: _selected! && _selectedIndex == index
? BoxDecoration(
color: Colors.orange,
shape: BoxShape.circle,
border: Border.all(
color: Colors.orange, width: 3))
: null,
),
],
),
),
);
}),
),
),
|
I hope you enjoyed learning about how to highlight the tapped 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 Flutter Calendar documentation to understand how to create and manipulate data.
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