4 lab

lib/domain/models/carddata.dart

@@ -0,0 +1,10 @@
+
+class CardData {
+  final String text;
+  final String descriptionText;
+  final String? imageUrl;
+
+  CardData(this.text,
+      {required this.descriptionText,
+        this.imageUrl});
+}

lib/main.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:pmu_labs/presentation/home_page/home_page.dart';
 
 void main() {
   runApp(const MyApp());
@@ -36,90 +37,8 @@ class MyApp extends StatelessWidget {
   }
 }
 
-class MyHomePage extends StatefulWidget {
-  const MyHomePage({super.key, required this.title});
 
-  // This widget is the home page of your application. It is stateful, meaning
-  // that it has a State object (defined below) that contains fields that affect
-  // how it looks.
 
-  // This class is the configuration for the state. It holds the values (in this
-  // case the title) provided by the parent (in this case the App widget) and
-  // used by the build method of the State. Fields in a Widget subclass are
-  // always marked "final".
 
-  final String title;
 
-  @override
-  State<MyHomePage> createState() => _MyHomePageState();
-}
 
-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: Center(
-        // Center is a layout widget. It takes a single child and positions it
-        // in the middle of the parent.
-        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: <Widget>[
-            const Text(
-              'You have pushed the button this many times:',
-            ),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headlineMedium,
-            ),
-          ],
-        ),
-      ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
-        tooltip: 'Increment',
-        child: const Icon(Icons.add),
-      ), // This trailing comma makes auto-formatting nicer for build methods.
-    );
-  }
-}

lib/presentation/details_page/details_page.dart

@@ -0,0 +1,36 @@
+import 'package:flutter/material.dart';
+import 'package:pmu_labs/domain/models/carddata.dart';
+
+class DetailsPage extends StatelessWidget {
+  final CardData data;
+
+  const DetailsPage(this.data, {super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(),
+      body: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Padding(
+              padding: const EdgeInsets.only(bottom: 16.0),
+              child: Image.network(
+                data.imageUrl ?? '',
+              )),
+
+          Padding(
+              padding: const EdgeInsets.only(bottom: 4.0),
+              child: Text(
+                data.text,
+                style: Theme.of(context).textTheme.headlineLarge,
+              )),
+          Text(
+              data.descriptionText,
+              style: Theme.of(context).textTheme.bodyLarge,
+              ),
+        ],
+      ),
+    );
+  }
+}

lib/presentation/home_page/card.dart

@@ -0,0 +1,103 @@
+part of 'home_page.dart';
+
+class _CardState extends State<_Card> {
+  bool isLiked = false;
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: widget.onTap,
+      child: Container(
+        margin: const EdgeInsets.only(top: 16),
+        constraints: const BoxConstraints(minHeight: 140),
+        padding: const EdgeInsets.all(16),
+        decoration: BoxDecoration(
+          color: Colors.amber,
+          borderRadius: BorderRadius.circular(20),
+          border: Border.all(
+            color: Colors.grey,
+            width: 2,
+          ),
+        ),
+        child: IntrinsicHeight(
+          child: Row(
+            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              ClipRRect(
+                borderRadius: BorderRadius.circular(20),
+                child: SizedBox(
+                  width: 140,
+                  height: 100,
+                  child: Image.network(
+                    widget.imageUrl ?? '',
+                    fit: BoxFit.cover,
+                    errorBuilder: (_, __, ___) => const Placeholder(),
+                  ),
+                ),
+              ),
+              Flexible(
+                  child: Padding(
+                padding: const EdgeInsets.only(left: 16.0),
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Text(widget.text,
+                        style: Theme.of(context).textTheme.headlineLarge),
+                    Text(widget.descriptionText,
+                        style: Theme.of(context).textTheme.bodyLarge),
+                  ],
+                ),
+              )),
+              Padding(
+                  padding:
+                      const EdgeInsets.only(left: 8.0, right: 16, bottom: 16),
+                  child: GestureDetector(
+                    onTap: () {
+                      setState(() {
+                        isLiked = !isLiked;
+                      });
+                      widget.onLike?.call(widget.text, isLiked);
+                    },
+                    child: AnimatedSwitcher(
+                      duration: const Duration(milliseconds: 300),
+                      child: isLiked
+                          ? const Icon(
+                              Icons.favorite,
+                              color: Colors.redAccent,
+                              key: ValueKey<int>(0),
+                            )
+                          : const Icon(Icons.favorite_border),
+                      key: ValueKey<int>(1),
+                    ),
+                  ))
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+typedef onLikeCallback = void Function(String title, bool isliked)?;
+
+class _Card extends StatefulWidget {
+  final String text;
+  final String descriptionText;
+  final String? imageUrl;
+  final onLikeCallback onLike;
+  final VoidCallback? onTap;
+
+  const _Card(this.text,
+      {required this.descriptionText, this.imageUrl, this.onLike, this.onTap});
+
+  factory _Card.fromData(CardData data, {onLikeCallback onLike, VoidCallback? onTap}) =>
+      _Card(data.text,
+          descriptionText: data.descriptionText,
+          imageUrl: data.imageUrl,
+          onLike: onLike,
+          onTap: onTap);
+
+  @override
+  State<_Card> createState() => _CardState();
+}

lib/presentation/home_page/home_page.dart

@@ -0,0 +1,95 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:pmu_labs/presentation/details_page/details_page.dart';
+
+import '../../domain/models/carddata.dart';
+
+part 'card.dart';
+
+
+class MyHomePage extends StatefulWidget {
+  const MyHomePage({super.key, required this.title});
+
+  // This widget is the home page of your application. It is stateful, meaning
+  // that it has a State object (defined below) that contains fields that affect
+  // how it looks.
+
+  // This class is the configuration for the state. It holds the values (in this
+  // case the title) provided by the parent (in this case the App widget) and
+  // used by the build method of the State. Fields in a Widget subclass are
+  // always marked "final".
+
+  final String title;
+
+  @override
+  State<MyHomePage> createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        backgroundColor: Theme
+            .of(context)
+            .colorScheme
+            .inversePrimary,
+        title: Text(widget.title),
+      ),
+      body: const Body(),
+    );
+  }
+
+  
+
+}
+
+class Body extends StatelessWidget {
+  const Body({super.key});
+
+  void _showSnackbar(BuildContext context, String title, bool isLiked) {
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+        content: Text(
+          'Лайк на $title ${isLiked ? 'поставлен':'убран'}',
+          style: Theme.of(context).textTheme.bodyLarge,
+        ),
+        backgroundColor: Colors.orangeAccent,
+        duration: const Duration(seconds: 1),
+      ));
+    });
+  }
+  void _navToDetails(BuildContext context, CardData data)
+  {
+    Navigator.push(context, CupertinoPageRoute(builder: (context) => DetailsPage(data)));
+  }
+
+  @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.',
+          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.',
+          imageUrl:
+          'https://lovecraft.country/images/bibliography/The-Shadow-over-Innsmouth.webp')
+    ];
+    return Center(
+      child: SingleChildScrollView(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: data.map((e) => _Card.fromData(e,onLike: (title, isLiked) => _showSnackbar(context, title, isLiked), onTap: () => _navToDetails(context, e))).toList(),
+        ),
+      ),
+    );
+  }
+}