Untitled

import 'package:flutter/material.dart';

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

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

class ButtonColumn extends StatefulWidget {
  @override
  _ButtonColumnState createState() => _ButtonColumnState();
}

class _ButtonColumnState extends State<ButtonColumn> {
  int _selectedIndex = 0; // Index of the currently selected button

  List<String> buttonLabels = ['Button 1', 'Button 2', 'Button 3', 'Button 4'];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Button Column Example')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: List.generate(buttonLabels.length, (index) {
            return ElevatedButton(
              onPressed: () {
                setState(() {
                  _selectedIndex = index; // Update selected index
                });
              },
              style: ElevatedButton.styleFrom(
                primary: _selectedIndex == index ? Colors.red : null,
              ),
              child: Text(buttonLabels[index]),
            );
          }),
        ),
      ),
    );
  }
}