calorimeter/lib/utils/calendar_floating_button.dart

import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';

class CalendarFloatingButton extends StatelessWidget {
  final DateTime date;

  const CalendarFloatingButton({super.key, required this.date});

  @override
  Widget build(BuildContext context) {
    return FloatingActionButton(
        onPressed: () async {
          var router = GoRouter.of(context);
          var datePicked = await showDatePicker(
            locale: const Locale('de'),
            context: context,
            initialDate: date,
            currentDate: DateTime.now(),
            firstDate: DateTime.now().subtract(const Duration(days: 365 * 10)),
            lastDate: DateTime.now(),
          );

          router.pushNamed('perDay', extra: datePicked);
        },
        child: const Icon(Icons.today));
  }
}