output.diff

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Counter App',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Counter Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
-  MyHomePage({Key? key, required this.title}) : super(key: key);
+  const MyHomePage({super.key, required this.title});

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  void _decrementCounter() {
    setState(() {
      if(_counter > 0){
        _counter--;
      }
    });
  }

  void _resetCounter(){
    setState((){
      _counter = 0;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
-              style: Theme.of(context).textTheme.headline4,
+              style: Theme.of(context).textTheme.headlineLarge,
            ),
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                FloatingActionButton(
                  onPressed: _decrementCounter,
                  tooltip: 'Decrement',
                  child: Icon(Icons.remove),
                ),
                SizedBox(width: 20), // Add spacing
                FloatingActionButton(
                  onPressed: _incrementCounter,
                  tooltip: 'Increment',
                  child: Icon(Icons.add),
                ),
              ],
            ),
            SizedBox(height: 20),
            ElevatedButton(onPressed: _resetCounter, child: Text("Reset"))
          ],
        ),
      ),
    );
  }
}