headerBuilder method
Builds header inside LimitedBox. You can overwrite this method if you want to customize header.
Implementation
Widget headerBuilder(BuildContext context) => Padding(
padding: EdgeInsets.all(10.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Center(
child: LimitedBox(
maxHeight: MediaQuery.of(context).size.height / 3 - 100.0,
maxWidth: MediaQuery.of(context).size.width - 20.0,
child: header,
),
),
],
),
);