pmu_flutter/lec3/lib/main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'My Test App',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'My Test App'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final Color _color = Colors.orangeAccent;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: _color,
        title: Text(widget.title),
      ),
      body: const MyWidget(),
    );
  }
}

class MyWidget extends StatelessWidget {
  const MyWidget({super.key});

  @override
  Widget build(BuildContext context) {
    final data = [
      _CardData(
        'Hello',
        descriptionText: 'Hello text',
        imageUrl:
            'https://unsplash.com/photos/6GMq7AGxNbE/download?ixid=M3wxMjA3fDB8MXxzZWFyY2h8Mnx8cmFjY29vbnxlbnwwfHx8fDE3Mjc5MTExNTl8MA&force=true&w=640',
      ),
      _CardData(
        'Hello 2',
        descriptionText: 'Hello 2 text',
        icon: Icons.add,
        imageUrl:
            'https://unsplash.com/photos/UopR2NUBYek/download?ixid=M3wxMjA3fDB8MXxzZWFyY2h8MTF8fHJhY2Nvb258ZW58MHx8fHwxNzI3OTExMTU5fDA&force=true&w=640',
      ),
      _CardData(
        'Hello 3',
        descriptionText: 'Hello 3 text',
        icon: Icons.add,
        imageUrl:
            'https://upload.wikimedia.org/wikipedia/commons/thumb/4/47/Raccoon_on_Log.jpg/640px-Raccoon_on_Log.jpg',
      ),
    ];

    return Center(
      child: SingleChildScrollView(
        padding: const EdgeInsets.only(left: 16, right: 16, top: 8, bottom: 8),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: data.map((e) => _Card.fromData(e)).toList(),
        ),
      ),
    );
  }
}

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, {
    this.icon = Icons.ac_unit_outlined,
    required this.descriptionText,
    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: 8, bottom: 8),
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: Colors.white70,
        borderRadius: BorderRadius.circular(20),
        border: Border.all(color: Colors.grey),
        boxShadow: [
          BoxShadow(
            color: Colors.grey.withOpacity(.5),
            spreadRadius: 4,
            offset: const Offset(0, 5),
            blurRadius: 8,
          ),
        ],
      ),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          ClipRRect(
            borderRadius: BorderRadius.circular(20),
            child: SizedBox(
              height: 140,
              width: 100,
              child: Image.network(
                imageUrl ?? '',
                fit: BoxFit.cover,
                errorBuilder: (_, __, ___) => const Placeholder(),
              ),
            ),
          ),
          Expanded(
            child: Padding(
              padding: const EdgeInsets.only(left: 8.0),
              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),
          )
        ],
      ),
    );
  }
}