HiddingselAppOriginal/lib/todo/calendar_old.dart

import 'dart:core';


/*class CalendarListPage extends StatefulWidget with NavigationDrawerItem {

  final String title = 'Termine';

  @override
  State<StatefulWidget> createState() => CalendarListPageState();
}

class CalendarListPageState extends State<CalendarListPage> {
  List _selectedDayList = [];
  Map<DateTime, List<EventModel>> _events = {};
  CalendarController? _calendarController;

  @override
  void dispose() {
    _calendarController!.dispose();
    super.dispose();
  }

  @override
  void initState() {
    super.initState();
    _calendarController = CalendarController();
    init();
  }

  void init() async {
    EventController.getEventListStream().forEach((events) {
      setState(() {
        _events = _mapListToCalendarEvents(events);
        _selectedDayList = events
            .where((e) =>
        DateTime(e.schedule.startTime.year, e.schedule.startTime.month, e.schedule.startTime.day) ==
            DateTime(
                _calendarController!.selectedDay.year,
                _calendarController!.selectedDay.month,
                _calendarController!.selectedDay.day))
            .toList();
      });
    });
  }

  @override
  Widget build(BuildContext context) => SafeArea(
        bottom: false,
        child: Padding(
          padding: const EdgeInsets.fromLTRB(UIShapes.paddingSimple,
              UIShapes.paddingSimple, UIShapes.paddingSimple, 0),
          child: ListView(
            primary: true,
            children: <Widget>[
              FormattedCalendar(_events, _calendarController!, _onDaySelected),
              ColumnExtension.builder(
                itemCount: _selectedDayList.length,
                itemBuilder: (context, index) =>
                    CalendarListTile(_selectedDayList[index]),
              ),
            ],
          ),
        ),
      );

  void _onDaySelected(DateTime dateTime, List list, List list2) {
    setState(() {
      _selectedDayList = list.isEmpty ? [] : list;
    });
  }

  Map<DateTime, List<EventModel>> _mapListToCalendarEvents(List<EventModel> list) {
    final map = <DateTime, List<EventModel>>{};
    DateTime dateKey;
    int i;
    int j;
    for (final e in list) {
      j = 0;
      dateKey = e.schedule.startTime;
      do {
        if (e.schedule.frequency != Frequency.once && e.schedule.interval != null) {
          if (e.schedule.frequency == Frequency.days) {
            dateKey = dateKey.add(Duration(days: e.schedule.interval!));
          } else if (e.schedule.frequency == Frequency.weeks) {
            dateKey = dateKey.add(Duration(days: 7 * e.schedule.interval!));
          } else if (e.schedule.frequency == Frequency.months) {
            dateKey = dateKey =
                DateTime(dateKey.year, dateKey.month + e.schedule.interval!, dateKey.day);
          }
          if (e.schedule.until != null && e.schedule.until!.isBefore(dateKey)) {
            break;
          }
        }
        i = 0;
        do {
          var dateKey2 = dateKey.add(Duration(days: i));
          dateKey2 = DateTime(dateKey2.year, dateKey2.month, dateKey2.day);
          if (map.containsKey(dateKey2)) {
            map[dateKey2]!.add(e);
          } else {
            map[dateKey2] = [e];
          }
          i++;
        } while (i < e.schedule.endTime.difference(e.schedule.startTime).inDays);
        j++;
      } while (e.schedule.frequency != Frequency.once && e.schedule.interval != null && j < 52);
    }
    return map;
  }
}

class FormattedCalendar extends StatelessWidget {
  final Map<DateTime, List> _events;
  final CalendarController _controller;
  final void Function(DateTime, List, List) _onDaySelected;

  const FormattedCalendar(this._events, this._controller, this._onDaySelected);

  @override
  Widget build(BuildContext context) {
    final defaultCalendar = TableCalendar(
      calendarController: CalendarController(),
    );
    final calendar = TableCalendar(
      locale: 'de_DE',
      availableCalendarFormats: const {
        CalendarFormat.month: 'Month',
      },
      headerStyle: HeaderStyle(
        centerHeaderTitle: true,
        titleTextBuilder: (date, locale) =>
            '${getMonthName(date.month)} ${date.year.toString()}'.toUpperCase(),
        titleTextStyle: UITheme.theme.textTheme.headline5,
      ),
      daysOfWeekStyle: DaysOfWeekStyle(
        weekendStyle: defaultCalendar.daysOfWeekStyle.weekdayStyle,
        dowTextBuilder: (date, locale) =>
            getDayName(date.weekday).toUpperCase(),
      ),
      startingDayOfWeek: StartingDayOfWeek.monday,
      calendarStyle: CalendarStyle(
        outsideWeekendStyle: defaultCalendar.calendarStyle.outsideStyle,
        weekendStyle: defaultCalendar.calendarStyle.weekdayStyle
            .apply(color: UIColors.grey5),
        weekdayStyle: defaultCalendar.calendarStyle.weekdayStyle
            .apply(color: UIColors.grey5),
        eventDayStyle: defaultCalendar.calendarStyle.weekdayStyle
            .apply(color: UIColors.grey5,),
        todayColor: UIColors.grey3,
        selectedColor: UIColors.grey5,
        markersColor: Color(0xFFFFD445),
      ),
      events: _events,
      calendarController: _controller,
      onDaySelected: _onDaySelected,
    );
    return calendar;
  }

  static String getMonthName(int month) {
    switch (month) {
      case 1:
        return 'Januar';
      case 2:
        return 'Februar';
      case 3:
        return 'März';
      case 4:
        return 'April';
      case 5:
        return 'Mai';
      case 6:
        return 'Juni';
      case 7:
        return 'July';
      case 8:
        return 'August';
      case 9:
        return 'September';
      case 10:
        return 'Oktober';
      case 11:
        return 'November';
      case 12:
        return 'Dezember';
      default:
        return '?';
    }
  }

  static String getDayName(int month) {
    switch (month) {
      case 1:
        return 'Mo';
      case 2:
        return 'Di';
      case 3:
        return 'Mi';
      case 4:
        return 'Do';
      case 5:
        return 'Fr';
      case 6:
        return 'Sa';
      case 7:
        return 'So';
      default:
        return '?';
    }
  }
}
*/