No scroll refresh page.

no_scroll_refresh_widget.dart

/// A resuable widget for getting a page to refresh without needing to scroll with the ugly scroll behaviour
/// on ios. Used by wrapping the widget with the view with this widget as so
/// class MyHomePage extends StatelessWidget {
///  const MyHomePage({super.key, required this.title});
///
/// final String title;
///
///  @override
///  Widget build(BuildContext context) {
///   return NoScrollRefreshWidget(
///     onRefresh: () async {},
///     child: Scaffold(
///       appBar: AppBar(
///          title: Text(title),
///        ),
///        body: Center(
///          child: Column(
///            mainAxisAlignment: MainAxisAlignment.center,
///            children: const <Widget>[
///              Text(
///                'You have pushed the button this many times:',
///              ),
///            ],
///          ),
///        ),
///      ),
///    );
///  }
/// }

class NoScrollRefreshWidget extends StatelessWidget {
  const NoScrollRefreshWidget({
    Key? key,
    required this.onRefresh,
    required this.child,
  }) : super(key: key);
  final Widget child;
  final RefreshCallback onRefresh;

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

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