Swipe to refresh on a non-scrollable page.

non_scrollable_refresh_indicator.dart

import 'package:flutter/material.dart';

class _ClampingScrollBehavior extends ScrollBehavior {
  @override
  ScrollPhysics getScrollPhysics(BuildContext context) =>
      const ClampingScrollPhysics();
}

class NonScrollableRefreshIndicator extends StatelessWidget {
  final Widget child;
  final Future<void> Function() onRefresh;

  const NonScrollableRefreshIndicator({
    required this.child,
    required this.onRefresh,
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    return LayoutBuilder(
      builder: ((_, constraints) {
        return RefreshIndicator(
          onRefresh: onRefresh,
          child: ScrollConfiguration(
            behavior: _ClampingScrollBehavior(),
            child: SingleChildScrollView(
              physics: const AlwaysScrollableScrollPhysics(),
              child: ConstrainedBox(
                constraints: BoxConstraints(
                  minHeight: MediaQuery.of(context).size.height,
                  maxHeight: MediaQuery.of(context).size.height,
                ),
                child: child,
              ),
            ),
          ),
        );
      }),
    );
  }
}