test

analysis_options.yaml

+include: package:flutter_lints/flutter.yaml
+
+linter:
+  rules:
+    prefer_const_constructors: false
+    prefer_final_fields: false
+    use_key_in_widget_constructors: false
+    prefer_const_literals_to_create_immutables: false
+    prefer_const_constructors_in_immutables: false
+    avoid_print: false
\ No newline at end of file

main.dart

+import 'package:english_words/english_words.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+import 'package:provider/provider.dart';
+
+void main() {
+  runApp(MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return ChangeNotifierProvider(
+      create: (context) => MyAppState(),
+      child: MaterialApp(
+        title: 'Namer App',
+        theme: ThemeData(
+          useMaterial3: true,
+          colorScheme: ColorScheme.fromSeed(seedColor: Colors.yellow),
+        ),
+        home: MyHomePage(),
+      ),
+    );
+  }
+}
+
+class MyAppState extends ChangeNotifier {
+  var current = WordPair.random();
+
+  void getNext() {
+    current = WordPair.random();
+    notifyListeners();
+  }
+
+  // ↓ Add the code below.
+  var favorites = <WordPair>[];
+
+  void toggleFavorite() {
+    if (favorites.contains(current)) {
+      favorites.remove(current);
+    } else {
+      favorites.add(current);
+    }
+    notifyListeners();
+  }
+}
+
+class MyHomePage extends StatefulWidget {
+  @override
+  State<MyHomePage> createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage> {
+
+  var selectedIndex = 0;     // ← Add this property.
+
+  @override
+  Widget build(BuildContext context) {
+    Widget page;
+    switch (selectedIndex) {
+      case 0:
+        page = GeneratorPage();
+        break;
+      case 1:
+        page = FavoritesPage();
+        break;
+      default:
+        throw UnimplementedError('no widget for $selectedIndex');
+    }
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        return Scaffold(
+          body: Row(
+            children: [
+              SafeArea(
+                child: NavigationRail(
+                  extended: constraints.maxWidth >= 600,  // ← Here.
+                  destinations: [
+                    NavigationRailDestination(
+                      icon: Icon(Icons.home),
+                      label: Text('Home'),
+                    ),
+                    NavigationRailDestination(
+                      icon: Icon(Icons.favorite),
+                      label: Text('Favorites'),
+                    ),
+                  ],
+                  selectedIndex: selectedIndex,    // ← Change to this.
+                  onDestinationSelected: (value) {
+        
+                    // ↓ Replace print with this.
+                    setState(() {
+                      selectedIndex = value;
+                    });
+        
+                  },
+                ),
+              ),
+              Expanded(
+                child: Container(
+                  color: Theme.of(context).colorScheme.primaryContainer,
+                  child: page, //GeneratorPage(),
+                ),
+              ),
+            ],
+          ),
+        );
+      }
+    );
+  }
+}
+
+class GeneratorPage extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    var appState = context.watch<MyAppState>();
+    var pair = appState.current;
+
+    IconData icon;
+    if (appState.favorites.contains(pair)) {
+      icon = Icons.favorite;
+    } else {
+      icon = Icons.favorite_border;
+    }
+
+    return Center(
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          BigCard(pair: pair),
+          SizedBox(height: 10),
+          Row(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              ElevatedButton.icon(
+                onPressed: () {
+                  appState.toggleFavorite();
+                },
+                icon: Icon(icon),
+                label: Text('Like'),
+              ),
+              SizedBox(width: 10),
+              ElevatedButton(
+                onPressed: () {
+                  appState.getNext();
+                },
+                child: Text('Next'),
+              ),
+            ],
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class BigCard extends StatelessWidget {
+  const BigCard({
+    super.key,
+    required this.pair,
+  });
+
+  final WordPair pair;
+
+   @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    // ↓ Add this.
+    final style = theme.textTheme.displayMedium!.copyWith(
+      color: theme.colorScheme.onPrimary,
+    );
+
+    return Card(
+      color: theme.colorScheme.primary,
+      child: Padding(
+        padding: const EdgeInsets.all(20),
+        // ↓ Change this line.
+        child: Text(
+          pair.asLowerCase,
+          style: style,
+          semanticsLabel: "${pair.first} ${pair.second}",
+        ),
+      ),
+    );
+  }
+}
+
+class FavoritesPage extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    var appState = context.watch<MyAppState>();
+
+    if (appState.favorites.isEmpty) {
+      return Center(
+        child: Text('(null)'),
+      );
+    }
+
+    return ListView(
+      children: [
+        Padding(
+          padding: const EdgeInsets.all(20),
+          child: Text('You have '
+              '${appState.favorites.length} favorites:'),
+        ),
+        for (var pair in appState.favorites)
+          ListTile(
+            leading: Icon(Icons.favorite),
+            title: Text(pair.asLowerCase),
+          ),
+      ],
+    );
+  }
+}
\ No newline at end of file

pubspec.yaml

+name: assign
+description: A new Flutter project.
+
+publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+
+version: 0.0.1+1
+
+environment:
+  sdk: '>=2.19.4 <4.0.0'
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+  english_words: ^4.0.0
+  provider: ^6.0.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+  flutter_lints: ^2.0.0
+
+flutter:
+  uses-material-design: true
\ No newline at end of file