lab3 done
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57c7532eb0
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231
lib/main.dart
231
lib/main.dart
@ -22,14 +22,13 @@ class MyApp extends StatelessWidget {
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}
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}
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// Enum для управления состоянием сообщений
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enum MessageType { noQuotes, newQuoteAdded }
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// Модель цитаты
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class Quote {
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final String text;
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final String author;
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Quote(this.text, this.author);
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final String imagePath;
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Quote(this.text, this.author, this.imagePath);
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}
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// Главный экран
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@ -42,39 +41,117 @@ class MyHomePage extends StatefulWidget {
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}
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class _MyHomePageState extends State<MyHomePage> {
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final TextEditingController quoteTextController = TextEditingController();
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final TextEditingController quoteAuthorController = TextEditingController();
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final List<Quote> _quotes = [];
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MessageType _messageType = MessageType.noQuotes;
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final String defaultImagePath =
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'https://cdn-icons-png.flaticon.com/128/17818/17818874.png';
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// Метод добавления цитаты
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Future<void> _addQuote() async {
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final result = await showDialog<Map<String, String>?>(
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context: context,
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builder: (BuildContext context) => const AddQuoteDialog(),
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);
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@override
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void initState() {
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super.initState();
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if (result != null && result['quote'] != '' && result['author'] != '') {
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// Тестовые цитаты
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_quotes.add(Quote(
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'Сила воли — это ключ к успеху.',
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'Аноним',
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'https://cdn-icons-png.flaticon.com/128/17818/17818880.png',
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));
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_quotes.add(Quote(
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'Вера в себя — это первый шаг к победе.',
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'Аноним',
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'https://cdn-icons-png.flaticon.com/128/17818/17818889.png',
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));
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_quotes.add(Quote(
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'Не бойся быть отличным, бойся быть обычным.',
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'Аноним',
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'https://cdn-icons-png.flaticon.com/128/17818/17818899.png',
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));
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}
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void _addQuote() {
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setState(() {
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_quotes.add(
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Quote(result['quote']!.addQuotesIfMissing(), result['author']!.capitalize()),
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final newQuote = Quote(
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quoteTextController.text.addQuotesIfMissing().capitalize(),
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quoteAuthorController.text.capitalize(),
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defaultImagePath, // Устанавливаем дефолтное изображение
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);
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_messageType = MessageType.newQuoteAdded;
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_quotes.add(newQuote);
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quoteTextController.clear();
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quoteAuthorController.clear();
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});
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}
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void _removeQuote(int index) {
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setState(() {
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_quotes.removeAt(index);
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});
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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backgroundColor: Theme.of(context).colorScheme.inversePrimary,
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title: Text(widget.title),
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title: const Text('Цитаты'),
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backgroundColor: Theme.of(context).colorScheme.primaryContainer,
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foregroundColor: Theme.of(context).colorScheme.onPrimaryContainer,
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),
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body: Stack(
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children: [
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Center(
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child: _messageType == MessageType.noQuotes
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? const NoQuotesMessage()
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: QuoteList(quotes: _quotes),
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Column(
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children: [
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const Padding(
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padding: EdgeInsets.all(16.0),
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child: Text(
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'Список цитат',
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style: TextStyle(fontSize: 20, fontWeight: FontWeight.normal),
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),
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),
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Expanded(
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child: _quotes.isEmpty
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? const Center(
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child: Text(
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'Нет добавленных цитат. Добавьте первую!',
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style: TextStyle(fontSize: 18, color: Colors.grey),
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),
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)
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: ListView.builder(
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itemCount: _quotes.length,
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itemBuilder: (context, index) {
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final quote = _quotes[index];
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return Card(
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margin: const EdgeInsets.symmetric(
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vertical: 8.0,
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horizontal: 10.0,
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),
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child: ListTile(
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contentPadding: const EdgeInsets.all(8.0),
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leading: SizedBox(
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width: 50.0,
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child: Image.network(
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quote.imagePath,
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fit: BoxFit.cover,
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errorBuilder: (_, __, ___) =>
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const Icon(Icons.error, color: Colors.red),
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),
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),
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title: Text(
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quote.text,
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style: const TextStyle(
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fontSize: 18, fontWeight: FontWeight.w500),
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),
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subtitle: Text('- ${quote.author}'),
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trailing: IconButton(
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icon: const Icon(Icons.delete),
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onPressed: () => _removeQuote(index),
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),
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),
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);
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},
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),
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),
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],
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),
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Align(
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alignment: Alignment.bottomCenter,
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@ -83,46 +160,46 @@ class _MyHomePageState extends State<MyHomePage> {
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],
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),
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floatingActionButton: FloatingActionButton(
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onPressed: _addQuote,
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tooltip: 'Добавить цитату',
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child: const Icon(Icons.format_quote),
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onPressed: () {
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showDialog(
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context: context,
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builder: (context) {
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return AlertDialog(
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title: const Text('Новая цитата'),
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content: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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TextField(
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controller: quoteTextController,
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decoration: const InputDecoration(
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hintText: 'Введите текст цитаты',
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),
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);
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}
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}
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// Виджет списка цитат
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class QuoteList extends StatelessWidget {
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final List<Quote> quotes;
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const QuoteList({super.key, required this.quotes});
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@override
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Widget build(BuildContext context) {
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return ListView.builder(
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itemCount: quotes.length,
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itemBuilder: (context, index) {
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return ListTile(
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title: Text(
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quotes[index].text,
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style: const TextStyle(fontSize: 18, fontWeight: FontWeight.w500),
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),
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subtitle: Text('- ${quotes[index].author}'),
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const SizedBox(height: 8),
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TextField(
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controller: quoteAuthorController,
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decoration: const InputDecoration(
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hintText: 'Введите автора цитаты',
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),
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),
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],
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),
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actions: [
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TextButton(
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onPressed: () {
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_addQuote();
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Navigator.of(context).pop();
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},
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child: const Text('Добавить'),
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),
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],
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);
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},
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);
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}
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}
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// Виджет сообщения "нет цитат"
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class NoQuotesMessage extends StatelessWidget {
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const NoQuotesMessage({super.key});
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@override
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Widget build(BuildContext context) {
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return const Text(
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'Нет добавленных цитат. Добавь первую!',
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textAlign: TextAlign.center,
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style: TextStyle(fontSize: 18, color: Colors.grey),
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},
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tooltip: 'Добавить цитату',
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child: const Icon(Icons.format_quote),
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),
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);
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}
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}
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@ -135,7 +212,7 @@ class QuoteCounter extends StatelessWidget {
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@override
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Widget build(BuildContext context) {
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return Padding(
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padding: const EdgeInsets.all(30.0),
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padding: const EdgeInsets.all(16.0),
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child: Container(
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padding: const EdgeInsets.symmetric(vertical: 5, horizontal: 10),
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decoration: BoxDecoration(
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@ -148,50 +225,14 @@ class QuoteCounter extends StatelessWidget {
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),
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child: Text(
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'Количество цитат: $count',
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style: const TextStyle(fontSize: 16, fontWeight: FontWeight.w600, color: Colors.black),
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style: const TextStyle(
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fontSize: 16, fontWeight: FontWeight.w600, color: Colors.black),
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),
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),
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);
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}
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}
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// Диалоговое окно добавления цитаты
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class AddQuoteDialog extends StatelessWidget {
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const AddQuoteDialog({super.key});
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@override
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Widget build(BuildContext context) {
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final TextEditingController quoteController = TextEditingController();
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final TextEditingController authorController = TextEditingController();
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return AlertDialog(
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title: const Text('Добавить цитату'),
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content: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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TextField(
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controller: quoteController,
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decoration: const InputDecoration(labelText: 'Цитата'),
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),
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TextField(
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controller: authorController,
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decoration: const InputDecoration(labelText: 'Автор'),
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),
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],
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),
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actions: [
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TextButton(
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onPressed: () => Navigator.of(context).pop({
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'quote': quoteController.text,
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'author': authorController.text,
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}),
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child: const Text('Добавить'),
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),
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],
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);
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}
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}
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// Расширение для форматирования текста
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extension StringExtension on String {
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String capitalize() {
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