Avalonia/samples/ControlCatalog/Pages/TabbedPage/TabbedPageGesturePage.xaml.cs

using System.Linq;
using Avalonia.Controls;
using Avalonia.Input.GestureRecognizers;

namespace ControlCatalog.Pages
{
    public partial class TabbedPageGesturePage : UserControl
    {
        public TabbedPageGesturePage()
        {
            InitializeComponent();
            EnableMouseSwipeGesture(DemoTabs);
        }

        private void OnGestureEnabledChanged(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
        {
            if (DemoTabs != null)
                DemoTabs.IsGestureEnabled = GestureCheck.IsChecked == true;
        }

        private void OnPlacementChanged(object? sender, SelectionChangedEventArgs e)
        {
            if (DemoTabs == null) return;
            DemoTabs.TabPlacement = PlacementCombo.SelectedIndex switch
            {
                1 => TabPlacement.Bottom,
                2 => TabPlacement.Left,
                3 => TabPlacement.Right,
                _ => TabPlacement.Top
            };
        }

        private static void EnableMouseSwipeGesture(Control control)
        {
            var recognizer = control.GestureRecognizers
                .OfType<SwipeGestureRecognizer>()
                .FirstOrDefault();

            if (recognizer is not null)
                recognizer.IsMouseEnabled = true;
        }
    }
}