XAML-Map-Control/MapControl/Avalonia/MapItem.Avalonia.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Input;

namespace MapControl
{
    public partial class MapItem
    {
        public static readonly StyledProperty<bool> AutoCollapseProperty =
            MapPanel.AutoCollapseProperty.AddOwner<MapItem>();

        public static readonly StyledProperty<Location> LocationProperty =
            MapPanel.LocationProperty.AddOwner<MapItem>();

        static MapItem()
        {
            LocationProperty.Changed.AddClassHandler<MapItem, Location>((item, e) => item.UpdateMapTransform());
        }

        protected override void OnPointerPressed(PointerPressedEventArgs e)
        {
            if (e.Pointer.Type != PointerType.Mouse &&
                ItemsControl.ItemsControlFromItemContainer(this) is MapItemsControl mapItemsControl)
            {
                mapItemsControl.UpdateSelection(this, e);
            }

            e.Handled = true;
        }

        protected override void OnPointerReleased(PointerReleasedEventArgs e)
        {
            if (e.Pointer.Type == PointerType.Mouse &&
                e.InitialPressMouseButton == MouseButton.Left &&
                ItemsControl.ItemsControlFromItemContainer(this) is MapItemsControl mapItemsControl)
            {
                mapItemsControl.UpdateSelection(this, e);
            }

            e.Handled = true;
        }
    }
}