Split into multiple files

lib/main.dart

@@ -1,6 +1,8 @@
-import 'package:english_words/english_words.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
+import 'states/my_app_states.dart';
+import 'widgets/big_card.dart';
+import 'widgets/my_home_page.dart';
 
 void main() {
   runApp(MyApp());
@@ -25,90 +27,6 @@ class MyApp extends StatelessWidget {
   }
 }
 
-class MyAppState extends ChangeNotifier {
-  var current = WordPair.random();
-  var favourites = <WordPair>[];
-
-  void getNext() {
-    current = WordPair.random();
-    notifyListeners();
-  }
-
-  void toggleFavourites() {
-    if (favourites.contains(current)) {
-      favourites.remove(current);
-    } else {
-      favourites.add(current);
-    }
-    notifyListeners();
-  }
-}
-
-class BigCard extends StatelessWidget {
-  const BigCard({
-    super.key,
-    required this.pair,
-  });
-
-  final WordPair pair;
-
-  @override
-  Widget build(BuildContext context) {
-    final theme = Theme.of(context);
-    final style = theme.textTheme.displayMedium!.copyWith(
-      color: theme.colorScheme.onPrimary,
-    );
-
-    return Card(
-      color: theme.colorScheme.primary,
-      child: Padding(
-        padding: const EdgeInsets.all(20.0),
-        child: Text(pair.asLowerCase,
-            semanticsLabel: "${pair.first} ${pair.second}", style: style),
-      ),
-    );
-  }
-}
-
-// ...
-
-class MyHomePage extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      body: Row(
-        children: [
-          SafeArea(
-            child: NavigationRail(
-              extended: true,
-              destinations: [
-                NavigationRailDestination(
-                  icon: Icon(Icons.home),
-                  label: Text('Home'),
-                ),
-                NavigationRailDestination(
-                  icon: Icon(Icons.favorite),
-                  label: Text('Favorites'),
-                ),
-              ],
-              selectedIndex: 0,
-              onDestinationSelected: (value) {
-                print('selected: $value');
-              },
-            ),
-          ),
-          Expanded(
-            child: Container(
-              color: Theme.of(context).colorScheme.primaryContainer,
-              child: GeneratorPage(),
-            ),
-          ),
-        ],
-      ),
-    );
-  }
-}
-
 class GeneratorPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {

lib/states/my_app_states.dart

@@ -0,0 +1,23 @@
+library;
+
+import 'package:english_words/english_words.dart';
+import 'package:flutter/material.dart';
+
+class MyAppState extends ChangeNotifier {
+  var current = WordPair.random();
+  var favourites = <WordPair>[];
+
+  void getNext() {
+    current = WordPair.random();
+    notifyListeners();
+  }
+
+  void toggleFavourites() {
+    if (favourites.contains(current)) {
+      favourites.remove(current);
+    } else {
+      favourites.add(current);
+    }
+    notifyListeners();
+  }
+}

lib/widgets/big_card.dart

@@ -0,0 +1,30 @@
+library;
+
+import 'package:english_words/english_words.dart';
+import 'package:flutter/material.dart';
+
+class BigCard extends StatelessWidget {
+  const BigCard({
+    super.key,
+    required this.pair,
+  });
+
+  final WordPair pair;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final style = theme.textTheme.displayMedium!.copyWith(
+      color: theme.colorScheme.onPrimary,
+    );
+
+    return Card(
+      color: theme.colorScheme.primary,
+      child: Padding(
+        padding: const EdgeInsets.all(20.0),
+        child: Text(pair.asLowerCase,
+            semanticsLabel: "${pair.first} ${pair.second}", style: style),
+      ),
+    );
+  }
+}

lib/widgets/generator.dart

@@ -0,0 +1,50 @@
+library;
+
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import '../states/my_app_states.dart';
+import 'big_card.dart';
+
+class GeneratorPage extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    var appState = context.watch<MyAppState>();
+    var pair = appState.current;
+
+    IconData icon;
+    if (appState.favourites.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.toggleFavourites();
+                },
+                icon: Icon(icon),
+                label: Text('Like'),
+              ),
+              SizedBox(width: 10),
+              ElevatedButton(
+                onPressed: () {
+                  appState.getNext();
+                },
+                child: Text('Next'),
+              ),
+            ],
+          ),
+        ],
+      ),
+    );
+  }
+}

lib/widgets/my_home_page.dart

@@ -0,0 +1,41 @@
+library;
+
+import 'package:flutter/material.dart';
+import 'generator.dart';
+
+class MyHomePage extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Row(
+        children: [
+          SafeArea(
+            child: NavigationRail(
+              extended: true,
+              destinations: [
+                NavigationRailDestination(
+                  icon: Icon(Icons.home),
+                  label: Text('Home'),
+                ),
+                NavigationRailDestination(
+                  icon: Icon(Icons.favorite),
+                  label: Text('Favorites'),
+                ),
+              ],
+              selectedIndex: 0,
+              onDestinationSelected: (value) {
+                print('selected: $value');
+              },
+            ),
+          ),
+          Expanded(
+            child: Container(
+              color: Theme.of(context).colorScheme.primaryContainer,
+              child: GeneratorPage(),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}