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: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key}) : super(key: key);

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

class _MyHomePageState extends State<MyHomePage> {
  final _controller = TextEditingController();
  bool _obscureText = true;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Flutter Demo')),
      body: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 20),
        child: Column(
          children: [
            const SizedBox(height: 80),
            TextFormField(
              controller: _controller,
              obscureText: _obscureText,
              decoration: InputDecoration(
                suffixIcon: IconButton(
                  icon: Icon(
                    _obscureText ? Icons.visibility_off : Icons.visibility,
                  ),
                  onPressed: () {
                    setState(() {
                      _obscureText = !_obscureText;
                    });
                  },
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}