[Flutter] Write Your First Flutter App, part 2

part 1 에 이어서 작성합니다.

class _RandomWordsState extends State<RandomWords> {
  final _suggestions = <WordPair>[];
  final _saved = <WordPair>{};
  final _biggerFont = const TextStyle(fontSize: 18);

  void _pushSaved() {
    Navigator.of(context).push(
      MaterialPageRoute<void>(
        builder: (context) {
          final tiles = _saved.map(
            (pair) {
              return ListTile(
                title: Text(
                  pair.asPascalCase,
                  style: _biggerFont,
                ),
              );
            },
          );
          final divided = tiles.isNotEmpty
              ? ListTile.divideTiles(
                  context: context,
                  tiles: tiles,
                ).toList()
              : <Widget>[];

          return Scaffold(
            appBar: AppBar(
              title: const Text('Saved Suggestions'),
            ),
            body: ListView(children: divided),
          );
        },
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    // final wordPair = WordPair.random();
    // return Text(wordPair.asPascalCase);
    return Scaffold(
      appBar: AppBar(
        title: const Text('Startup  Name Generator'),
        actions: [
          IconButton(
            icon: const Icon(Icons.list),
            onPressed: _pushSaved,
            tooltip: 'Saved Suggestions',
          ),
        ],
      ),
      body: ListView.builder(
        padding: const EdgeInsets.all(16.0),
        itemBuilder: (context, i) {
          if (i.isOdd) return const Divider();
          final index = i ~/ 2;
          if (index >= _suggestions.length) {
            _suggestions.addAll(generateWordPairs().take(10));
          }
          final alreadySaved = _saved.contains(_suggestions[index]);
          return ListTile(
              title: Text(
                _suggestions[index].asPascalCase,
                style: _biggerFont,
              ),
              trailing: Icon(
                alreadySaved ? Icons.favorite : Icons.favorite_border,
                color: alreadySaved ? Colors.red : null,
                semanticLabel: alreadySaved ? 'Remove from saved' : 'Save',
              ),
              onTap: () {
                setState(() {
                  if (alreadySaved) {
                    _saved.remove(_suggestions[index]);
                  } else {
                    _saved.add(_suggestions[index]);
                  }
                });
              });
        },
      ),
    );
  }
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Startup Name Generator',
      home: RandomWords(),
    );
  }
}

우측 상단의 햄버거 버튼을 누르면 하트 누른 목록만 확인할 수 있습니다.

테마 변경

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Startup Name Generator',
      theme: ThemeData(
        appBarTheme: const AppBarTheme(
          backgroundColor: Colors.white,
          foregroundColor: Colors.black,
        ),
      ),
      home: const RandomWords(),
    );
  }
}