flutter_neat_and_clean_calendar 0.1.2+4

Simple and clean flutter calendar with ability to slide up/down to show weekly/monthly calendar. Forked from [flutter_clean_calender](https://pub.dev/packages/flutter_clean_calendar)

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_neat_and_clean_calendar/flutter_neat_and_clean_calendar.dart';
import 'package:intl/intl.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Clean Calendar Demo',
      home: CalendarScreen(),
    );
  }
}

class CalendarScreen extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _CalendarScreenState();
  }
}

class _CalendarScreenState extends State<CalendarScreen> {
  final Map<DateTime, List<NeatCleanCalendarEvent>> _events = {
    DateTime(DateTime.now().year, DateTime.now().month, DateTime.now().day): [
      NeatCleanCalendarEvent('Event A',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day, 10, 0),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day, 12, 0),
          description: 'A special event',
          color: Colors.blue[700]),
    ],
    DateTime(DateTime.now().year, DateTime.now().month, DateTime.now().day + 2):
        [
      NeatCleanCalendarEvent('Event B',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 10, 0),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 12, 0),
          color: Colors.orange),
      NeatCleanCalendarEvent('Event C',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 14, 30),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 17, 0),
          color: Colors.pink),
    ],
    DateTime(DateTime.now().year, DateTime.now().month, DateTime.now().day + 3):
        [
      NeatCleanCalendarEvent('Event B',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 10, 0),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 12, 0),
          color: Colors.orange),
      NeatCleanCalendarEvent('Event C',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 14, 30),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 17, 0),
          color: Colors.pink),
      NeatCleanCalendarEvent('Event C',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 14, 30),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 17, 0),
          color: Colors.pink),
      NeatCleanCalendarEvent('Event C',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 14, 30),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 17, 0),
          color: Colors.pink),
      NeatCleanCalendarEvent('Event C',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 14, 30),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 17, 0),
          color: Colors.pink),
      NeatCleanCalendarEvent('Event C',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 14, 30),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 17, 0),
          color: Colors.pink),
      NeatCleanCalendarEvent('Event C',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 14, 30),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 17, 0),
          color: Colors.pink),
      NeatCleanCalendarEvent('Event C',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 14, 30),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 17, 0),
          color: Colors.pink),
      NeatCleanCalendarEvent('Event C',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 14, 30),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 17, 0),
          color: Colors.pink),
      NeatCleanCalendarEvent('Event C',
          startTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 14, 30),
          endTime: DateTime(DateTime.now().year, DateTime.now().month,
              DateTime.now().day + 2, 17, 0),
          color: Colors.pink),
    ],
  };

  @override
  void initState() {
    super.initState();
    // Force selection of today on first load, so that the list of today's events gets shown.
    _handleNewDate(DateTime(
        DateTime.now().year, DateTime.now().month, DateTime.now().day));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Calendar(
          startOnMonday: true,
          weekDays: ['Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa', 'So'],
          events: _events,
          isExpandable: true,
          eventDoneColor: Colors.green,
          selectedColor: Colors.pink,
          todayColor: Colors.blue,
          eventColor: Colors.grey,
          locale: 'de_DE',
          todayButtonText: 'Heute',
          expandableDateFormat: 'EEEE, dd. MMMM yyyy',
          dayOfWeekStyle: TextStyle(
              color: Colors.black, fontWeight: FontWeight.w800, fontSize: 11),
        ),
      ),
    );
  }

  /// This function [_buildEventList] constructs the list of events of a selected day. This
  /// list is rendered below the week view or the month view.
  Widget _eventListBuilder(
      BuildContext context, List<NeatCleanCalendarEvent> eventList) {
    return Expanded(
      child: ListView.builder(
        padding: EdgeInsets.all(0.0),
        itemBuilder: (BuildContext context, int index) {
          final NeatCleanCalendarEvent event = eventList[index];
          final String start =
              DateFormat('HH:mm').format(event.startTime).toString();
          final String end =
              DateFormat('HH:mm').format(event.endTime).toString();
          return ListTile(
            contentPadding:
                EdgeInsets.only(left: 2.0, right: 8.0, top: 2.0, bottom: 2.0),
            leading: Container(
              width: 10.0,
              color: event.color,
            ),
            title: Text(event.summary),
            subtitle:
                event.description.isNotEmpty ? Text(event.description) : null,
            trailing: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [Text(start), Text(end)],
            ),
            onTap: () {},
          );
        },
        itemCount: eventList.length,
      ),
    );
  }

  void _handleNewDate(date) {
    print('Date selected: $date');
  }
}