import 'package:flutter/material.dart';

// ...

SegmentedButton<int>(
  style: ButtonStyle(
    // Customize the button style for verticalorientation
    padding: MaterialStateProperty.all(EdgeInsets.symmetric(vertical: 12.0, horizontal: 8.0)),
    textStyle: MaterialStateProperty.all(TextStyle(fontSize: 16.0)),
    // Add more styling as needed
  ),
  segments: const <ButtonSegment<int>>[
    ButtonSegment<int>(value: 0, label: Text('Option 1')),
    ButtonSegment<int>(value: 1, label: Text('Option 2')),
    ButtonSegment<int>(value: 2, label: Text('Option 3')),
    // Add more segments as needed
  ],
  selected: <int>{0}, // Set initial selection
  onSelectionChanged: (Set<int> newSelection) {
    // Handle selection changes
    print('Selected segment: ${newSelection.first}');
  },
  direction: Axis.vertical, // Set the direction to vertical
)