main.dart - master - 123321/sheet

main.dart
90 строк2 KB
123321
create main.dart
20 окт 2024, 17:19
20 окт 2024, 17:19817b169
import 'package:flutter/material.dart';

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

// ignore: use_key_in_widget_constructors
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: _CounterPage(),
    );
  }
}

class _CounterPage extends StatefulWidget {
  @override
  _CounterPageState createState() => _CounterPageState();
}

class _CounterPageState extends State<_CounterPage> {
  List<int> _counts = [0]; // Список для хранения значений счетчиков

  void _addCounter() {
    setState(() {
      _counts.add(0); // Добавляем новый счетчик
    });
  }

  void _increment(int index) {
    if (_counts[index] < 100) {
      setState(() {
        _counts[index]++;
      });
    }
  }

  void _decrement(int index) {
    if (_counts[index] > 0) {
      setState(() {
        _counts[index]--;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Counter App')),
      body: ListView.builder(
        itemCount: _counts.length,
        itemBuilder: (context, index) {
          return Card(
            margin: EdgeInsets.all(8.0),
            child: Padding(
              padding: const EdgeInsets.all(16.0),
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: [
                  Text(
                    '${_counts[index]}',
                    style: const TextStyle(fontSize: 48),
                  ),
                  Row(
                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                    children: [
                      FloatingActionButton(
                        onPressed: () => _decrement(index),
                        child: const Icon(Icons.remove),
                      ),
                      FloatingActionButton(
                        onPressed: () => _increment(index),
                        child: const Icon(Icons.add),
                      ),
                    ],
                  ),
                ],
              ),
            ),
          );
        },
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _addCounter,
        child: const Icon(Icons.add),
      ),
    );
  }
}