lab_2_done

lib/Item.dart

@@ -0,0 +1,14 @@
+
+
+enum ItemCategory{
+  Food,
+  Clothing,
+  Electronic
+}
+
+class Item {
+  final String name;
+  final ItemCategory category;
+
+  Item(this.name, this.category);
+}

lib/ShoppingCart.dart

@@ -0,0 +1,27 @@
+import 'Item.dart';
+
+class ShoppingCart{
+  List<Item> items = [];
+
+  void addItem(Item item){
+    items.add(item);
+  }
+
+  void removeItem(Item item){
+    items.remove(item);
+  }
+
+  void clearItems(){
+    items.clear();
+  }
+
+  List<Item> filterItems(ItemCategory category){
+    return items.where((item) => item.category == category).toList();
+  }
+}
+
+Future<void> addItemWithDelay(ShoppingCart cart, Item item) async {
+  await Future.delayed(Duration(seconds: 2));
+  cart.addItem(item);
+}
+

lib/main.dart

@@ -1,70 +1,93 @@
+import 'dart:math';
+
+import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
+import 'Item.dart';
+import 'ShoppingCart.dart';
+
 void main() {
-  runApp(const MyApp());
+  runApp(MyApp());
 }
 
 class MyApp extends StatelessWidget {
-  const MyApp({super.key});
-
-    @override
+  @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Flutter Demo',
-      theme: ThemeData(
-        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
-        useMaterial3: true,
-      ),
-      home: const MyHomePage(title: 'Крюков Алексей Игоревич || ПИбд-31  '),
+      home: ShoppingListScreen(),
     );
   }
 }
 
-class MyHomePage extends StatefulWidget {
-  const MyHomePage({super.key, required this.title});
-
-      
-        
-  final String title;
-
+class ShoppingListScreen extends StatefulWidget {
   @override
-  State<MyHomePage> createState() => _MyHomePageState();
+  _ShoppingListScreenState createState() => _ShoppingListScreenState();
 }
 
-class _MyHomePageState extends State<MyHomePage> {
-  int _counter = 0;
+class _ShoppingListScreenState extends State<ShoppingListScreen> {
+  final ShoppingCart cart = ShoppingCart();
 
-  void _incrementCounter() {
-    setState(() {
-      _counter++;
-    });
-  }
+  List<ItemCategory> categories = [ItemCategory.Food, ItemCategory.Clothing, ItemCategory.Electronic];
+  final Random random = Random();
 
   @override
   Widget build(BuildContext context) {
+
+
     return Scaffold(
       appBar: AppBar(
-        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: Text(widget.title),
+        title: Text('Список покупок'),
       ),
-      body: Center(
-        child: Column(
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            const Text(
-              'You have pushed the button this many times:',
+      body: Column(
+        children: [
+          // Кнопка для добавления товара
+          ElevatedButton(
+            onPressed: () async {
+              // Определяем текущую категорию
+              ItemCategory category = categories[random.nextInt(categories.length)];
+              String itemName;
+
+              switch (category) {
+                case ItemCategory.Food:
+                  itemName = 'Food${random.nextInt(100)}';
+                  break;
+                case ItemCategory.Clothing:
+                  itemName = 'Clothing${random.nextInt(100)}';
+                  break;
+                case ItemCategory.Electronic:
+                  itemName = 'Electronic${random.nextInt(100)}';
+                  break;
+              }
+
+              // Добавление товара с задержкой
+              await addItemWithDelay(cart, Item(itemName, category));
+              setState(() {;
+              });
+            },
+            child: Text('Добавить товар'),
+          ),
+          // Кнопка для очистки корзины
+          ElevatedButton(
+            onPressed: () {
+              cart.clearItems();
+              setState(() {});
+            },
+            child: Text('Очистить корзину'),
+          ),
+
+          Expanded(
+            child: ListView.builder(
+              itemCount: cart.items.length,
+              itemBuilder: (context, index) {
+                return ListTile(
+                  title: Text(cart.items[index].name),
+                  subtitle: Text(cart.items[index].category.toString().split('.').last),
+                );
+              },
             ),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headlineMedium,
-            ),
-          ],
-        ),
+          ),
+        ],
       ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
-        tooltip: 'Increment',
-        child: const Icon(Icons.add),
-      ),     );
+    );
   }
-}
+}

test/widget_test.dart

@@ -13,7 +13,7 @@ import 'package:flutter_test_app/main.dart';
 void main() {
   testWidgets('Counter increments smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(const MyApp());
+    await tester.pumpWidget(MyApp());
 
     // Verify that our counter starts at 0.
     expect(find.text('0'), findsOneWidget);