apidash/lib/widgets/expandable_section.dart

import 'package:flutter/material.dart';

class ExpandableSection extends StatefulWidget {
  const ExpandableSection(
      {super.key, required this.title, required this.child});

  final String title;
  final Widget child;

  @override
  State<ExpandableSection> createState() => _ExpandableSectionState();
}

class _ExpandableSectionState extends State<ExpandableSection> {
  bool _open = false;

  @override
  Widget build(BuildContext context) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        InkWell(
          enableFeedback: false,
          borderRadius: BorderRadius.circular(3),
          onTap: () => setState(() => _open = !_open),
          child: Padding(
            padding: const EdgeInsets.symmetric(horizontal: 4),
            child: Row(
              children: [
                Expanded(
                  child: Text(
                    widget.title,
                    style: Theme.of(context).textTheme.titleSmall,
                  ),
                ),
                Icon(
                  _open ? Icons.keyboard_arrow_up : Icons.keyboard_arrow_down,
                ),
              ],
            ),
          ),
        ),
        if (_open)
          Padding(
            padding: const EdgeInsets.fromLTRB(12, 0, 12, 12),
            child: widget.child,
          ),
      ],
    );
  }
}