140 lines
4.2 KiB
Dart
140 lines
4.2 KiB
Dart
import 'package:flutter/material.dart';
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void main() {
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runApp(MyApp());
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}
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class MyApp extends StatelessWidget {
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: 'Рецепты',
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theme: ThemeData(
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scaffoldBackgroundColor: Colors.purple[100],
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),
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home: RecipeHome(),
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);
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}
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}
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enum Cuisine { Italian, Indian, Chinese, Georgian }
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class Recipe {
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String name;
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Cuisine cuisine;
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List<String> ingredients;
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Recipe({required this.name, required this.cuisine, required this.ingredients});
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String getDetails() {
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return 'Рецепт: $name\nКухня: ${cuisine.toString().split('.').last}\nИнгредиенты: ${ingredients.join(', ')}';
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}
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}
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class RecipeManager<T extends Recipe> {
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List<T> _recipes = [];
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Future<void> addRecipe(T recipe) async {
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await Future.delayed(Duration(seconds: 1)); // Имитация асинхронной операции
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_recipes.add(recipe);
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}
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List<T> getAllRecipes() => _recipes;
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T? getRecipeAt(int index) {
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if (index < _recipes.length) {
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return _recipes[index];
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}
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return null; // Вернём null, если индекс вне диапазона
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}
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}
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extension RecipeListExtension<T extends Recipe> on List<T> {
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void printAllRecipes() {
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for (var recipe in this) {
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print(recipe.getDetails());
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}
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}
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}
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class RecipeHome extends StatefulWidget {
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@override
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_RecipeHomeState createState() => _RecipeHomeState();
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}
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class _RecipeHomeState extends State<RecipeHome> {
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final RecipeManager<Recipe> _recipeManager = RecipeManager();
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final TextEditingController _nameController = TextEditingController();
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final TextEditingController _ingredientsController = TextEditingController();
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Cuisine? _selectedCuisine;
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void _addRecipe() {
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final name = _nameController.text;
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final ingredients = _ingredientsController.text.split(',').map((s) => s.trim()).toList();
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if (name.isNotEmpty && ingredients.isNotEmpty && _selectedCuisine != null) {
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final recipe = Recipe(name: name, cuisine: _selectedCuisine!, ingredients: ingredients);
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_recipeManager.addRecipe(recipe).then((_) {
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_nameController.clear();
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_ingredientsController.clear();
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_selectedCuisine = null;
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setState(() {}); // Обновляем интерфейс
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});
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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(title: Text('Создание Рецептов')),
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body: Padding(
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padding: const EdgeInsets.all(16.0),
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child: Column(
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children: [
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TextField(
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controller: _nameController,
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decoration: InputDecoration(labelText: 'Название рецепта'),
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),
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DropdownButton<Cuisine>(
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hint: Text('Выберите кухню'),
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value: _selectedCuisine,
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onChanged: (Cuisine? newValue) {
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setState(() {
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_selectedCuisine = newValue;
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});
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},
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items: Cuisine.values.map((Cuisine cuisine) {
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return DropdownMenuItem<Cuisine>(
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value: cuisine,
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child: Text(cuisine.toString().split('.').last),
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);
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}).toList(),
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),
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TextField(
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controller: _ingredientsController,
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decoration: InputDecoration(labelText: 'Ингредиенты (через запятую)'),
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),
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SizedBox(height: 20),
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ElevatedButton(
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onPressed: _addRecipe,
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child: Text('Добавить Рецепт'),
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),
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SizedBox(height: 20),
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Expanded(
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child: ListView.builder(
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itemCount: _recipeManager.getAllRecipes().length,
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itemBuilder: (context, index) {
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final recipe = _recipeManager.getRecipeAt(index);
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return ListTile(
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title: Text(recipe?.name ?? 'Имеется ошибка'),
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subtitle: Text(recipe?.getDetails() ?? ''),
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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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}
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} |