실생활 앱 (실시간 메모)

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

class SharedMemo {
  const SharedMemo({required this.author, required this.text});
  final String author;
  final String text;
}

class RealtimeMemoApp extends StatefulWidget {
  const RealtimeMemoApp({super.key});

  @override
  State<RealtimeMemoApp> createState() => _RealtimeMemoAppState();
}

class _RealtimeMemoAppState extends State<RealtimeMemoApp> {
  final controller = TextEditingController(text: '회의 내용 정리');
  final streamController = StreamController<List<SharedMemo>>.broadcast();
  var memos = const [
    SharedMemo(author: '나', text: 'Flutter Wiki 초안 작성'),
    SharedMemo(author: '팀원', text: '배포 전 링크 확인'),
  ];

  @override
  void initState() {
    super.initState();
    streamController.add(memos);
  }

  void addMemo() {
    final text = controller.text.trim();
    if (text.isEmpty) return;
    memos = [...memos, SharedMemo(author: '나', text: text)];
    streamController.add(memos);
    controller.clear();
  }

  @override
  void dispose() {
    streamController.close();
    controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        TextField(controller: controller),
        ElevatedButton(onPressed: addMemo, child: const Text('공유')),
        StreamBuilder<List<SharedMemo>>(
          stream: streamController.stream,
          initialData: memos,
          builder: (context, snapshot) {
            final items = snapshot.data ?? [];
            return Column(
              children: items.map((memo) {
                return ListTile(
                  title: Text(memo.text),
                  subtitle: Text(memo.author),
                );
              }).toList(),
            );
          },
        ),
      ],
    );
  }
}

Card(
  child: Padding(
    padding: const EdgeInsets.all(20),
    child: Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        const Text(
          '프로젝트 보드',
          style: TextStyle(fontSize: 22, fontWeight: FontWeight.w900),
        ),
        const SizedBox(height: 16),
        LinearProgressIndicator(value: progress),
      const SizedBox(height: 12),
      Row(
        children: List.generate(3, (stage) {
          return Expanded(child: Text(['할 일', '진행', '완료'][stage]));
        }),
      ),
      ...cards.map((card) {
        return OutlinedButton(
          onPressed: () => moveCard(card),
          child: Text(card.title),
        );
      })
      ],
    ),
  ),
)