ethio_greg_dual_calendar 0.1.1

Dual-calendar dates and calendar UIs for Flutter in both the Gregorian and Ethiopian (Amete Mihret) calendars, localized in English, Amharic, and Afaan Oromoo.

example/lib/main.dart

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

void main() => runApp(const ExampleApp());

/// Demonstrates live calendar/language switching: every rendered date follows
/// the settings row at the top, with no per-widget plumbing.
class ExampleApp extends StatefulWidget {
  const ExampleApp({super.key});

  @override
  State<ExampleApp> createState() => _ExampleAppState();
}

class _ExampleAppState extends State<ExampleApp> {
  String _language = 'en';
  var _calendar = CalendarSystem.gregorian;
  var _geez = false;

  DateTime _selected = DateTime.now();
  DateTime _focused = DateTime.now();

  void _apply(void Function() change) {
    setState(() {
      change();
      // One global assignment; the setState rebuild re-resolves every date.
      AppDate.config = EthioCalendarConfig(
        calendar: _calendar,
        l10n: CalendarL10n.forLocale(_language),
        geezDayNumbers: _geez,
      );
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'ethio_greg_dual_calendar example',
      theme: ThemeData(colorSchemeSeed: Colors.green),
      home: Scaffold(
        appBar: AppBar(title: const Text('ethio_greg_dual_calendar')),
        body: ListView(
          padding: const EdgeInsets.all(16),
          children: [
            // Settings: language, calendar system, Ge'ez day numbers.
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                const Text('Language'),
                DropdownButton<String>(
                  value: _language,
                  items: const [
                    DropdownMenuItem(value: 'en', child: Text('English')),
                    DropdownMenuItem(value: 'am', child: Text('አማርኛ')),
                    DropdownMenuItem(value: 'om', child: Text('Afaan Oromoo')),
                    DropdownMenuItem(value: 'ti', child: Text('ትግርኛ')),
                  ],
                  onChanged: (v) => _apply(() => _language = v!),
                ),
              ],
            ),
            CalendarSelector(
              value: _calendar,
              onChanged: (v) => _apply(() => _calendar = v),
            ),
            SwitchListTile(
              contentPadding: EdgeInsets.zero,
              title: const Text('Ge\'ez day numbers (፩ ፲ ፴)'),
              value: _geez,
              onChanged: (v) => _apply(() => _geez = v),
            ),
            const Divider(),

            // Formatted dates re-resolve on every settings change.
            Text(
              AppDate.mediumDate(_selected),
              style: Theme.of(context).textTheme.headlineSmall,
            ),
            Text(AppDate.relativeOrWeekdayMonthDay(_selected)),
            const SizedBox(height: 16),

            MonthSelector(
              date: _focused,
              onDateChanged: (d) => setState(() => _focused = d),
            ),
            MonthCalendar(
              focusedDate: _focused,
              selectedDate: _selected,
              firstDate: DateTime(2020),
              lastDate: DateTime(2030),
              onDaySelected: (day) => setState(() => _selected = day),
              onFocusedDateChanged: (month) =>
                  setState(() => _focused = month),
              eventCountForDay: (day) => day.day % 7 == 0 ? 2 : 0,
            ),
            const Divider(),

            const Text('Day strip (auto-scrolls to the selected day):'),
            WeekLongCalendar(
              selectedDate: _selected,
              onDaySelected: (day) => setState(() {
                _selected = day;
                _focused = day;
              }),
            ),
            const Divider(),

            // EthioCalendarScope: both systems side by side in one tree,
            // independent of the global settings above.
            const Text('Both calendars at once via EthioCalendarScope:'),
            const SizedBox(height: 8),
            Row(
              children: [
                Expanded(
                  child: EthioCalendarScope(
                    config: const EthioCalendarConfig(),
                    child: Builder(
                      builder: (context) => Text(
                        EthioCalendarScope.of(context).mediumDate(_selected),
                        textAlign: TextAlign.center,
                      ),
                    ),
                  ),
                ),
                Expanded(
                  child: EthioCalendarScope(
                    config: const EthioCalendarConfig(
                      calendar: CalendarSystem.ethiopian,
                      l10n: CalendarL10n.am,
                    ),
                    child: Builder(
                      builder: (context) => Text(
                        EthioCalendarScope.of(context).mediumDate(_selected),
                        textAlign: TextAlign.center,
                      ),
                    ),
                  ),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}