thai_buddhist_date_pickers 0.3.0

Flutter calendar and pickers (dialog/fullscreen, range, multi) for Thai Buddhist (พ.ศ.) and Gregorian (ค.ศ.), built on thai_buddhist_date.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:thai_buddhist_date_pickers/thai_buddhist_date_pickers.dart';
import 'package:thai_buddhist_date/thai_buddhist_date.dart' as tbd;

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await tbd.ThaiDateService().initializeLocale('th_TH');
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(home: HomePage());
  }
}

class HomePage extends StatefulWidget {
  const HomePage({super.key});
  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Thai Pickers Example')),
      body: ListView(
        padding: const EdgeInsets.all(24),
        children: [
          Center(
            child: ConstrainedBox(
              constraints: const BoxConstraints(maxWidth: 420),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  ElevatedButton(
                    onPressed: () async {
                      final d = await showThaiDatePicker(
                        context,
                        initialDate: DateTime.now(),
                        era: tbd.Era.be,
                        locale: 'th_TH',
                      );
                      if (!context.mounted) return;
                      final label = d == null
                          ? '-'
                          : tbd.format(d, pattern: 'dmy', era: tbd.Era.be);
                      ScaffoldMessenger.of(context).showSnackBar(
                        SnackBar(content: Text('Picked date (พ.ศ.): $label')),
                      );
                    },
                    child: const Text('Pick a date (พ.ศ.)'),
                  ),
                  const SizedBox(height: 12),
                  ElevatedButton(
                    onPressed: () async {
                      final dt = await showThaiDateTimePicker(
                        context,
                        initialDateTime: DateTime.now(),
                        era: tbd.Era.ce,
                        locale: 'th_TH',
                        formatString: 'dd/MM/yyyy HH:mm',
                      );
                      if (!context.mounted) return;
                      ScaffoldMessenger.of(context).showSnackBar(
                        SnackBar(
                          content:
                              Text('Picked date-time (ค.ศ.): ${dt ?? '-'}'),
                        ),
                      );
                    },
                    child: const Text('Pick date-time (ค.ศ.)'),
                  ),
                  const SizedBox(height: 12),
                  ElevatedButton(
                    onPressed: () async {
                      final range = await showThaiDateRangePicker(
                        context,
                        era: tbd.Era.be,
                        locale: 'th_TH',
                      );
                      if (!context.mounted) return;
                      final text = range == null
                          ? '-'
                          : '${tbd.format(range.start, pattern: 'dmy')} → ${tbd.format(range.end, pattern: 'dmy')}';
                      ScaffoldMessenger.of(context).showSnackBar(
                        SnackBar(content: Text('Picked range: $text')),
                      );
                    },
                    child: const Text('Pick range (พ.ศ.)'),
                  ),
                  const SizedBox(height: 12),
                  ElevatedButton(
                    onPressed: () async {
                      final multiple = await showThaiMultiDatePicker(
                        context,
                        era: tbd.Era.be,
                        locale: 'th_TH',
                      );
                      if (!context.mounted) return;
                      final list = (multiple ?? const <DateTime>{})
                          .map((d) => tbd.format(d, pattern: 'dd/MM/yyyy'))
                          .join(', ');
                      ScaffoldMessenger.of(context).showSnackBar(
                        SnackBar(
                          content: Text(
                            'Picked multiple: ${list.isEmpty ? '-' : list}',
                          ),
                        ),
                      );
                    },
                    child: const Text('Pick multiple (พ.ศ.)'),
                  ),
                  const SizedBox(height: 12),
                  ElevatedButton(
                    onPressed: () async {
                      final d = await showThaiDatePickerFullscreen(
                        context,
                        initialDate: DateTime.now(),
                        era: tbd.Era.be,
                        locale: 'th_TH',
                      );
                      if (!context.mounted) return;
                      final label = d == null
                          ? '-'
                          : tbd.format(d, pattern: 'dmy', era: tbd.Era.be);
                      ScaffoldMessenger.of(context).showSnackBar(
                        SnackBar(content: Text('Picked fullscreen: $label')),
                      );
                    },
                    child: const Text('Pick fullscreen (พ.ศ.)'),
                  ),
                  const SizedBox(height: 12),
                  ElevatedButton(
                    onPressed: () async {
                      final s = await showThaiDatePickerFormatted(
                        context,
                        era: tbd.Era.be,
                        locale: 'th_TH',
                        formatString: 'dd MMM yyyy',
                      );
                      if (!context.mounted) return;
                      ScaffoldMessenger.of(context).showSnackBar(
                        SnackBar(
                          content: Text(
                            'Formatted (dialog returns string): ${s ?? '-'}',
                          ),
                        ),
                      );
                    },
                    child: const Text('Pick date (formatted)'),
                  ),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }
}