Make all tests pass again.

Menus displaying weirdly though.

Perspex.Base/Collections/IPerspexList.cs

@@ -9,14 +9,10 @@ namespace Perspex.Collections
     using System.Collections;
     using System.Collections.Generic;
 
-    public interface IPerspexList<T> : IList<T>, IList, IPerspexReadOnlyList<T>
+    public interface IPerspexList<T> : IList<T>, IPerspexReadOnlyList<T>
     {
-        new int Count { get; }
-
         void AddRange(IEnumerable<T> items);
 
-        new void Clear();
-
         void InsertRange(int index, IEnumerable<T> items);
 
         void RemoveAll(IEnumerable<T> items);

Perspex.Base/Collections/PerspexList.cs

@@ -23,7 +23,7 @@ namespace Perspex.Collections
     /// <see cref="NotifyCollectionChangedAction.Remove"/> action, passing the items that were
     /// removed.
     /// </remarks>
-    public class PerspexList<T> : IPerspexList<T>, INotifyCollectionChanged, INotifyPropertyChanged
+    public class PerspexList<T> : IPerspexList<T>, IList, INotifyCollectionChanged, INotifyPropertyChanged
     {
         private List<T> inner;
 

Perspex.Controls/DropDown.cs

@@ -69,6 +69,7 @@ namespace Perspex.Controls
         protected override void OnTemplateApplied()
         {
             var container = this.GetTemplateChild<Panel>("container");
+            ((IReparentingControl)container).ReparentLogicalChildren(this, this.LogicalChildren);
         }
 
         private void SetContentParent(Tuple<object, object> change)

Perspex.Controls/Panel.cs

@@ -21,7 +21,7 @@ namespace Perspex.Controls
     /// </remarks>
     public class Panel : Control, IReparentingControl
     {
-        private Controls children;
+        private Controls children = new Controls();
 
         private ILogical childLogicalParent;
 
@@ -30,6 +30,7 @@ namespace Perspex.Controls
         /// </summary>
         public Panel()
         {
+            this.children.CollectionChanged += this.ChildrenChanged;
             this.childLogicalParent = this;
         }
 
@@ -39,19 +40,13 @@ namespace Perspex.Controls
         /// <remarks>
         /// Even though this property can be set, the setter is only intended for use in object
         /// initializers. Assigning to this property does not change the underlying collection,
-        /// it simply clears the existing collection and addds the contents of the assigned
+        /// it simply clears the existing collection and adds the contents of the assigned
         /// collection.
         /// </remarks>
         public Controls Children
         {
             get
             {
-                if (this.children == null)
-                {
-                    this.children = new Controls();
-                    this.children.CollectionChanged += this.ChildrenChanged;
-                }
-
                 return this.children;
             }
 
@@ -59,25 +54,10 @@ namespace Perspex.Controls
             {
                 Contract.Requires<ArgumentNullException>(value != null);
 
-                if (this.children != value)
-                {
-                    if (this.children != null)
-                    {
-                        this.ClearLogicalParent(this.children);
-                        this.children.CollectionChanged -= this.ChildrenChanged;
-                    }
-
-                    this.children = value;
-                    this.ClearVisualChildren();
-
-                    if (this.children != null)
-                    {
-                        this.children.CollectionChanged += this.ChildrenChanged;
-                        this.AddVisualChildren(value);
-                        this.SetLogicalParent(value);
-                        this.InvalidateMeasure();
-                    }
-                }
+                this.ClearVisualChildren();
+                this.children.Clear();
+                this.children.AddRange(value);
+                this.LogicalChildren.AddRange(value);
             }
         }
 
@@ -107,16 +87,6 @@ namespace Perspex.Controls
             }
         }
 
-        /// <inheritdoc/>
-        protected virtual void OnChildrenAdded(IEnumerable<Control> child)
-        {
-        }
-
-        /// <inheritdoc/>
-        protected virtual void OnChildrenRemoved(IEnumerable<Control> child)
-        {
-        }
-
         /// <summary>
         /// Clears <see cref="IControl.Parent"/> for the specified controls.
         /// </summary>
@@ -160,7 +130,6 @@ namespace Perspex.Controls
                     this.SetLogicalParent(controls);
                     this.AddVisualChildren(e.NewItems.OfType<Visual>());
                     this.LogicalChildren.InsertRange(e.NewStartingIndex, controls);
-                    this.OnChildrenAdded(controls);
                     break;
 
                 case NotifyCollectionChangedAction.Remove:
@@ -168,7 +137,6 @@ namespace Perspex.Controls
                     this.ClearLogicalParent(e.OldItems.OfType<Control>());
                     this.LogicalChildren.RemoveAll(controls);
                     this.RemoveVisualChildren(e.OldItems.OfType<Visual>());
-                    this.OnChildrenRemoved(controls);
                     break;
 
                 case NotifyCollectionChangedAction.Reset:
@@ -177,7 +145,6 @@ namespace Perspex.Controls
                     this.LogicalChildren.Clear();
                     this.ClearVisualChildren();
                     this.AddVisualChildren(this.children);
-                    this.OnChildrenAdded(controls);
                     break;
             }
 

Perspex.Controls/Popup.cs

@@ -7,7 +7,6 @@
 namespace Perspex.Controls
 {
     using System;
-    using Perspex.Collections;
     using Perspex.Interactivity;
     using Perspex.Rendering;
     using Perspex.VisualTree;
@@ -58,27 +57,15 @@ namespace Perspex.Controls
         /// </summary>
         private TopLevel topLevel;
 
-        /// <summary>
-        /// The popup's logical child.
-        /// </summary>
-        private PerspexSingleItemList<ILogical> logicalChild = new PerspexSingleItemList<ILogical>();
-
         /// <summary>
         /// Initializes static members of the <see cref="Popup"/> class.
         /// </summary>
         static Popup()
         {
+            ChildProperty.Changed.AddClassHandler<Popup>(x => x.ChildChanged);
             IsOpenProperty.Changed.AddClassHandler<Popup>(x => x.IsOpenChanged);
         }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="Popup"/> class.
-        /// </summary>
-        public Popup()
-        {
-            this.GetObservableWithHistory(ChildProperty).Subscribe(this.ChildChanged);
-        }
-
         /// <summary>
         /// Raised when the popup closes.
         /// </summary>
@@ -267,20 +254,21 @@ namespace Perspex.Controls
         /// <summary>
         /// Called when the <see cref="Child"/> property changes.
         /// </summary>
-        /// <param name="values">The old and new values.</param>
-        private void ChildChanged(Tuple<Control, Control> values)
+        /// <param name="e">The event args.</param>
+        private void ChildChanged(PerspexPropertyChangedEventArgs e)
         {
-            if (values.Item1 != null)
+            this.LogicalChildren.Clear();
+
+            if (e.OldValue != null)
             {
-                ((ISetLogicalParent)values.Item1).SetParent(null);
+                ((ISetLogicalParent)e.OldValue).SetParent(null);
             }
 
-            if (values.Item2 != null)
+            if (e.NewValue != null)
             {
-                ((ISetLogicalParent)values.Item2).SetParent(this);
+                ((ISetLogicalParent)e.NewValue).SetParent(this);
+                this.LogicalChildren.Add((ILogical)e.NewValue);
             }
-
-            this.logicalChild.SingleItem = values.Item2;
         }
 
         /// <summary>

Perspex.Controls/Presenters/ContentPresenter.cs

@@ -6,14 +6,11 @@
 
 namespace Perspex.Controls.Presenters
 {
-    using System;
     using System.Linq;
     using System.Reactive.Linq;
-    using System.Reactive.Subjects;
     using Perspex.Collections;
     using Perspex.Controls.Primitives;
     using Perspex.Controls.Templates;
-    using Perspex.Media;
 
     /// <summary>
     /// Presents a single item of data inside a <see cref="TemplatedControl"/> template.
@@ -116,12 +113,17 @@ namespace Perspex.Controls.Presenters
             IControl result = null;
             object content = this.Content;
 
+            this.LogicalChildren.Clear();
             this.ClearVisualChildren();
 
             if (content != null)
             {
                 result = this.MaterializeDataTemplate(content);
-                ((ISetLogicalParent)result).SetParent(this.logicalParent ?? this);
+
+                if (result.Parent == null)
+                {
+                    ((ISetLogicalParent)result).SetParent(this.logicalParent ?? this);
+                }
 
                 var templatedParent = this.TemplatedParent as TemplatedControl;
 
@@ -132,10 +134,9 @@ namespace Perspex.Controls.Presenters
 
                 ((Control)result).TemplatedParent = templatedParent;
                 this.AddVisualChild(result);
+                this.LogicalChildren.Add(result);
             }
 
-            this.LogicalChildren.Clear();
-            this.LogicalChildren.Add(result);
             this.createdChild = true;
         }
     }

Perspex.Controls/Presenters/DeckPresenter.cs

@@ -12,11 +12,10 @@ namespace Perspex.Controls.Presenters
     using System.Reactive.Linq;
     using System.Threading.Tasks;
     using Perspex.Animation;
-    using Collections;
+    using Perspex.Collections;
     using Perspex.Controls.Generators;
     using Perspex.Controls.Primitives;
     using Perspex.Controls.Utils;
-    using Perspex.Styling;
 
     /// <summary>
     /// Displays pages inside an <see cref="ItemsControl"/>.
@@ -132,14 +131,6 @@ namespace Perspex.Controls.Presenters
             set { this.SetValue(TransitionProperty, value); }
         }
 
-        Panel IItemsPresenter.Panel
-        {
-            get
-            {
-                throw new NotImplementedException();
-            }
-        }
-
         /// <inheritdoc/>
         public override sealed void ApplyTemplate()
         {
@@ -152,7 +143,8 @@ namespace Perspex.Controls.Presenters
         /// <inheritdoc/>
         void IReparentingControl.ReparentLogicalChildren(ILogical logicalParent, IPerspexList<ILogical> children)
         {
-            throw new NotImplementedException();
+            this.ApplyTemplate();
+            ((IReparentingControl)this.Panel).ReparentLogicalChildren(logicalParent, children);
         }
 
         /// <summary>

Perspex.Controls/Primitives/AdornerLayer.cs

@@ -8,6 +8,7 @@ namespace Perspex.Controls.Primitives
 {
     using System;
     using System.Collections.Generic;
+    using System.Collections.Specialized;
     using System.Linq;
     using Perspex.VisualTree;
 
@@ -28,6 +29,11 @@ namespace Perspex.Controls.Primitives
             IsHitTestVisibleProperty.OverrideDefaultValue(typeof(AdornerLayer), false);
         }
 
+        public AdornerLayer()
+        {
+            this.Children.CollectionChanged += ChildrenCollectionChanged;
+        }
+
         public static Visual GetAdornedElement(Visual adorner)
         {
             return adorner.GetValue(AdornedElementProperty);
@@ -67,18 +73,19 @@ namespace Perspex.Controls.Primitives
             return finalSize;
         }
 
-        protected override void OnChildrenAdded(IEnumerable<Control> children)
+        private void ChildrenCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
         {
-            foreach (var i in children)
+            switch (e.Action)
             {
-                this.UpdateAdornedElement(i, i.GetValue(AdornedElementProperty));
-            }
+                case NotifyCollectionChangedAction.Add:
+                    foreach (Visual i in e.NewItems)
+                    {
+                        this.UpdateAdornedElement(i, i.GetValue(AdornedElementProperty));
+                    }
 
-            this.InvalidateArrange();
-        }
+                    break;
+            }
 
-        protected override void OnChildrenRemoved(IEnumerable<Control> child)
-        {
             this.InvalidateArrange();
         }
 

Perspex.Controls/TabControl.cs

@@ -7,10 +7,8 @@
 namespace Perspex.Controls
 {
     using Perspex.Animation;
-    using Perspex.Collections;
     using Perspex.Controls.Primitives;
     using Perspex.Controls.Templates;
-    using Perspex.Input;
 
     /// <summary>
     /// A tab control that displays a tab strip along with the content of the selected tab.
@@ -35,9 +33,6 @@ namespace Perspex.Controls
         public static readonly PerspexProperty<IPageTransition> TransitionProperty =
             Deck.TransitionProperty.AddOwner<TabControl>();
 
-        private PerspexReadOnlyListView<ILogical> logicalChildren =
-            new PerspexReadOnlyListView<ILogical>();
-
         /// <summary>
         /// Initializes static members of the <see cref="TabControl"/> class.
         /// </summary>
@@ -48,13 +43,6 @@ namespace Perspex.Controls
             SelectedIndexProperty.Changed.AddClassHandler<TabControl>(x => x.SelectedIndexChanged);
         }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="TabControl"/> class.
-        /// </summary>
-        public TabControl()
-        {
-        }
-
         /// <summary>
         /// Gets the content of the selected tab.
         /// </summary>
@@ -82,19 +70,15 @@ namespace Perspex.Controls
             set { this.SetValue(TransitionProperty, value); }
         }
 
-        /// <inheritdoc/>
-        protected override void OnKeyDown(KeyEventArgs e)
-        {
-            // Don't handle keypresses.
-        }
-
         /// <inheritdoc/>
         protected override void OnTemplateApplied()
         {
             base.OnTemplateApplied();
 
             var deck = this.GetTemplateChild<Deck>("deck");
-            this.logicalChildren.Source = ((ILogical)deck).LogicalChildren;
+            ((IReparentingControl)deck.Presenter.Panel).ReparentLogicalChildren(
+                this,
+                this.LogicalChildren);
         }
 
         /// <summary>

Tests/Perspex.Controls.UnitTests/ContentControlTests.cs

@@ -242,8 +242,7 @@ namespace Perspex.Controls.UnitTests
             contentControl.Content = child1;
             contentControl.ApplyTemplate();
 
-            ((ILogical)contentControl).LogicalChildren.CollectionChanged += (s, e) =>
-                called = e.Action == NotifyCollectionChangedAction.Replace;
+            ((ILogical)contentControl).LogicalChildren.CollectionChanged += (s, e) => called = true;
 
             contentControl.Content = child2;
 

Tests/Perspex.Controls.UnitTests/PanelTests.cs

@@ -7,7 +7,8 @@
 namespace Perspex.Controls.UnitTests
 {
     using System.Linq;
-    using Collections;
+    using Perspex.Collections;
+    using Perspex.LogicalTree;
     using Xunit;
 
     public class PanelTests
@@ -21,7 +22,7 @@ namespace Perspex.Controls.UnitTests
             panel.Children.Add(child);
 
             Assert.Equal(child.Parent, panel);
-            Assert.Equal(((ILogical)child).LogicalParent, panel);
+            Assert.Equal(child.GetLogicalParent(), panel);
         }
 
         [Fact]
@@ -33,7 +34,7 @@ namespace Perspex.Controls.UnitTests
             panel.Children = new Controls { child };
 
             Assert.Equal(child.Parent, panel);
-            Assert.Equal(((ILogical)child).LogicalParent, panel);
+            Assert.Equal(child.GetLogicalParent(), panel);
         }
 
         [Fact]
@@ -46,7 +47,7 @@ namespace Perspex.Controls.UnitTests
             panel.Children.Remove(child);
 
             Assert.Null(child.Parent);
-            Assert.Null(((ILogical)child).LogicalParent);
+            Assert.Null(child.GetLogicalParent());
         }
 
         [Fact]
@@ -61,9 +62,9 @@ namespace Perspex.Controls.UnitTests
             panel.Children.Clear();
 
             Assert.Null(child1.Parent);
-            Assert.Null(((ILogical)child1).LogicalParent);
+            Assert.Null(child1.GetLogicalParent());
             Assert.Null(child2.Parent);
-            Assert.Null(((ILogical)child2).LogicalParent);
+            Assert.Null(child2.GetLogicalParent());
         }
 
         [Fact]
@@ -78,9 +79,9 @@ namespace Perspex.Controls.UnitTests
             panel.Children = new Controls();
 
             Assert.Null(child1.Parent);
-            Assert.Null(((ILogical)child1).LogicalParent);
+            Assert.Null(child1.GetLogicalParent());
             Assert.Null(child2.Parent);
-            Assert.Null(((ILogical)child2).LogicalParent);
+            Assert.Null(child2.GetLogicalParent());
         }
 
         [Fact]
@@ -92,7 +93,7 @@ namespace Perspex.Controls.UnitTests
             panel.Children.Add(child);
 
             Assert.Equal(new[] { child }, panel.Children);
-            Assert.Equal(new[] { child }, ((ILogical)panel).LogicalChildren.ToList());
+            Assert.Equal(new[] { child }, panel.GetLogicalChildren());
         }
 
         [Fact]
@@ -105,7 +106,7 @@ namespace Perspex.Controls.UnitTests
             panel.Children.Remove(child);
 
             Assert.Equal(new Control[0], panel.Children);
-            Assert.Equal(new ILogical[0], ((ILogical)panel).LogicalChildren.ToList());
+            Assert.Equal(new ILogical[0], panel.GetLogicalChildren());
         }
 
         [Fact]

Tests/Perspex.Controls.UnitTests/PopupTests.cs

@@ -8,6 +8,7 @@ namespace Perspex.Controls.UnitTests
 {
     using System.Collections.Specialized;
     using System.Linq;
+    using Perspex.LogicalTree;
     using Xunit;
 
     public class PopupTests
@@ -45,7 +46,7 @@ namespace Perspex.Controls.UnitTests
 
             target.Child = child;
 
-            Assert.Equal(new[] { child }, ((ILogical)target).LogicalChildren.ToList());
+            Assert.Equal(new[] { child }, target.GetLogicalChildren());
         }
 
         [Fact]
@@ -102,8 +103,7 @@ namespace Perspex.Controls.UnitTests
 
             target.Child = child1;
 
-            ((ILogical)target).LogicalChildren.CollectionChanged += (s, e) =>
-                called = e.Action == NotifyCollectionChangedAction.Replace;
+            ((ILogical)target).LogicalChildren.CollectionChanged += (s, e) => called = true;
 
             target.Child = child2;