XAML-Map-Control/MapControl/MapPanel.WPF.cs

// XAML Map Control - http://xamlmapcontrol.codeplex.com/
// Copyright © Clemens Fischer 2012-2013
// Licensed under the Microsoft Public License (Ms-PL)

using System.Windows;

namespace MapControl
{
    public partial class MapPanel
    {
        private static readonly DependencyPropertyKey ParentMapPropertyKey = DependencyProperty.RegisterAttachedReadOnly(
            "ParentMap", typeof(MapBase), typeof(MapPanel),
            new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.Inherits, ParentMapPropertyChanged));

        public static readonly DependencyProperty ParentMapProperty = ParentMapPropertyKey.DependencyProperty;

        public static MapBase GetParentMap(UIElement element)
        {
            return (MapBase)element.GetValue(ParentMapProperty);
        }

        internal void SetParentMap()
        {
            SetValue(ParentMapPropertyKey, this);
        }
    }
}