enable or disable btn flutter snippet code

endsbtn.dart

import 'package:flutter/material.dart';

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

class MyApp extends StatefulWidget {
  MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final myController = TextEditingController();
  bool enable = false;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: Column(
            children: [
              SizedBox(
                width: 200,
                child: TextField(
                    cursorColor: Colors.red,
                    controller: myController,
                    onChanged: (val) {
                      if (myController.text.isNotEmpty) {
                        enable = true;
                      } else {
                        enable = false;
                      }
                      setState(() {
                        //
                      });
                    }),
              ),
              SizedBox(height: 20),
              ElevatedButton(
                onPressed: (enable)
                    ? () {
                        print(myController.text);
                      }
                    : null,
                child: Text('login'),
              ),
              SizedBox(height: 20),
              ElevatedButton(
                onPressed: null,
                child: Text('sign-in'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}