lib/main.dart

@@ -55,126 +55,71 @@ class MyHomePage extends StatefulWidget {
 }
 
 class _MyHomePageState extends State<MyHomePage> {
+  int _counter = 0;
+
+  void _incrementCounter() {
+    setState(() {
+      // This call to setState tells the Flutter framework that something has
+      // changed in this State, which causes it to rerun the build method below
+      // so that the display can reflect the updated values. If we changed
+      // _counter without calling setState(), then the build method would not be
+      // called again, and so nothing would appear to happen.
+      _counter++;
+    });
+  }
 
   @override
   Widget build(BuildContext context) {
+    // This method is rerun every time setState is called, for instance as done
+    // by the _incrementCounter method above.
+    //
+    // The Flutter framework has been optimized to make rerunning build methods
+    // fast, so that you can just rebuild anything that needs updating rather
+    // than having to individually change instances of widgets.
     return Scaffold(
       appBar: AppBar(
+        // TRY THIS: Try changing the color here to a specific color (to
+        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
+        // change color while the other colors stay the same.
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
+        // Here we take the value from the MyHomePage object that was created by
+        // the App.build method, and use it to set our appbar title.
         title: Text(widget.title),
       ),
-      body: const MyWidget(),
+      body: Center(
-    );
+        // Center is a layout widget. It takes a single child and positions it
-  }
+        // in the middle of the parent.
-}
-
-class MyWidget extends StatelessWidget {
-  const MyWidget({super.key});
-
-  @override
-  Widget build(BuildContext context) {
-    final data = [
-      _CardData(
-        'Зов Ктулху',
-        descriptionText: 'Лучше бы не находить разгадку, объединяющую сошедших с ума творцов...',
-        imageUrl: 'https://lovecraft.country/images/bibliography/call-of-cthulhu-mini.webp'
-      ),
-      _CardData(
-        'Хребты безумия',
-        descriptionText: '«Хребты безумия» написаны в документальной манере повествования, постепенно привыкая к которой, становишься свидетелем особой реальности описываемых событий.',
-        icon: Icons.hail,
-        imageUrl: 'https://lovecraft.country/images/bibliography/At-the-Mountains-of-Madness-mini.webp'
-      ),
-      _CardData('Тень над Инсмутом', descriptionText: 'Инсмут, маленький рыбацкий городок неподалеку от Аркхэма, уже много лет имеет дурную славу. В округе ходят жуткие истории о его угрюмых и уродливых жителях, от которых лучше держаться подальше.', icon: Icons.warning_amber, imageUrl: 'https://lovecraft.country/images/bibliography/The-Shadow-over-Innsmouth.webp')
-    ];
-    return Center(
-      child: SingleChildScrollView(
         child: Column(
+          // Column is also a layout widget. It takes a list of children and
+          // arranges them vertically. By default, it sizes itself to fit its
+          // children horizontally, and tries to be as tall as its parent.
+          //
+          // Column has various properties to control how it sizes itself and
+          // how it positions its children. Here we use mainAxisAlignment to
+          // center the children vertically; the main axis here is the vertical
+          // axis because Columns are vertical (the cross axis would be
+          // horizontal).
+          //
+          // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
+          // action in the IDE, or press "p" in the console), to see the
+          // wireframe for each widget.
           mainAxisAlignment: MainAxisAlignment.center,
-          children: data.map((e) => _Card.fromData(e)).toList(),
+          children: <Widget>[
+            const Text(
+              'You have pushed the button this many times:',
             ),
-      ),
+            Text(
-    );
+              '$_counter',
-  }
+              style: Theme.of(context).textTheme.headlineMedium,
-}
-
-class _CardData {
-  final String text;
-  final String descriptionText;
-  final IconData icon;
-  final String? imageUrl;
-
-  _CardData(this.text,
-      {required this.descriptionText,
-      this.icon = Icons.ac_unit_outlined,
-      this.imageUrl});
-}
-
-class _Card extends StatelessWidget {
-  final String text;
-  final String descriptionText;
-  final IconData icon;
-  final String? imageUrl;
-
-  const _Card(this.text,
-      {required this.descriptionText,
-      this.icon = Icons.ac_unit_outlined,
-      this.imageUrl});
-
-  factory _Card.fromData(_CardData data) => _Card(
-        data.text,
-        descriptionText: data.descriptionText,
-        icon: data.icon,
-        imageUrl: data.imageUrl,
-      );
-
-  @override
-  Widget build(BuildContext context) {
-    return Container(
-      margin: const EdgeInsets.only(top: 16),
-      padding: const EdgeInsets.all(16),
-      decoration: BoxDecoration(
-        color: Colors.amber,
-        borderRadius: BorderRadius.circular(20),
-        border: Border.all(
-          color: Colors.grey,
-          width: 2,
-        ),
-      ),
-      child: Row(
-        mainAxisAlignment: MainAxisAlignment.spaceBetween,
-        crossAxisAlignment: CrossAxisAlignment.start,
-        children: [
-          ClipRRect(
-            borderRadius: BorderRadius.circular(20),
-            child: SizedBox(
-              width: 140,
-              height: 100,
-              child: Image.network(
-                imageUrl ?? '',
-                fit: BoxFit.cover,
-                errorBuilder: (_, __, ___) => const Placeholder(),
-              ),
-            ),
-          ),
-          Flexible(
-              child: Padding(
-            padding: const EdgeInsets.only(left: 16.0),
-            child: Column(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Text(text, style: Theme.of(context).textTheme.headlineLarge),
-                Text(descriptionText,
-                    style: Theme.of(context).textTheme.bodyLarge),
-              ],
-            ),
-          )),
-          Padding(
-            padding: const EdgeInsets.only(left:8.0),
-            child: Icon(icon),
             ),
           ],
         ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: _incrementCounter,
+        tooltip: 'Increment',
+        child: const Icon(Icons.add),
+      ), // This trailing comma makes auto-formatting nicer for build methods.
     );
   }
 }