Moved Parent property to visual.

Visuals have parents too.

Perspex/Controls/ContentControl.cs

@@ -19,13 +19,17 @@ namespace Perspex.Controls
         {
             this.GetObservable(ContentProperty).Subscribe(x =>
             {
-                Visual visual = x as Visual;
-                Control control = x as Control;
+                IVisual visual = x as IVisual;
+                ILogical logical = x as ILogical;
 
-                if (control != null)
+                if (visual != null)
                 {
-                    ((IVisual)control).VisualParent = this;
-                    control.SetValue(ParentPropertyRW, this);
+                    visual.VisualParent = this;
+                }
+
+                if (logical != null)
+                {
+                    logical.LogicalParent = this;
                 }
             });
         }

Perspex/Controls/Control.cs

@@ -34,9 +34,6 @@ namespace Perspex.Controls
 
     public abstract class Control : Interactive, ILayoutable, IStyleable
     {
-        public static readonly ReadOnlyPerspexProperty<Control> ParentProperty =
-            new ReadOnlyPerspexProperty<Control>(ParentPropertyRW);
-
         public static readonly PerspexProperty<Brush> BackgroundProperty =
             PerspexProperty.Register<Control, Brush>("Background", inherits: true);
 
@@ -67,9 +64,6 @@ namespace Perspex.Controls
         public static readonly RoutedEvent<MouseEventArgs> MouseLeftButtonUpEvent =
             RoutedEvent.Register<Control, MouseEventArgs>("MouseLeftButtonUp", RoutingStrategy.Bubble);
 
-        internal static readonly PerspexProperty<Control> ParentPropertyRW =
-            PerspexProperty.Register<Control, Control>("Parent");
-
         private Classes classes;
 
         private string id;
@@ -219,12 +213,6 @@ namespace Perspex.Controls
             set { this.SetValue(MarginProperty, value); }
         }
 
-        public Control Parent
-        {
-            get { return this.GetValue(ParentPropertyRW); }
-            internal set { this.SetValue(ParentPropertyRW, value); }
-        }
-
         public Styles Styles
         {
             get

Perspex/Visual.cs

@@ -10,10 +10,17 @@ namespace Perspex
     using System.Collections.Generic;
     using System.Diagnostics.Contracts;
     using System.Linq;
+    using Perspex.Controls;
     using Perspex.Media;
 
     public abstract class Visual : PerspexObject, IVisual, ILogical
     {
+        public static readonly ReadOnlyPerspexProperty<Control> ParentProperty =
+            new ReadOnlyPerspexProperty<Control>(ParentPropertyRW);
+
+        internal static readonly PerspexProperty<Control> ParentPropertyRW =
+            PerspexProperty.Register<Control, Control>("Parent");
+
         private ILogical logicalParent;
 
         private IVisual visualParent;
@@ -24,10 +31,24 @@ namespace Perspex
             protected set;
         }
 
+        public Control Parent
+        {
+            get { return this.GetValue(ParentPropertyRW); }
+            protected set { this.SetValue(ParentPropertyRW, value); }
+        }
+
         ILogical ILogical.LogicalParent
         {
-            get { return this.logicalParent; }
-            set { this.logicalParent = value; }
+            get 
+            { 
+                return this.logicalParent; 
+            }
+            
+            set 
+            { 
+                this.logicalParent = value;
+                this.Parent = value as Control;
+            }
         }
 
         IEnumerable<ILogical> ILogical.LogicalChildren