From 2132ba2cc909884fb069b384f5ac30fce7cc63b5 Mon Sep 17 00:00:00 2001
From: Max Katz <maxkatz6@outlook.com>
Date: Sat, 6 Aug 2022 03:58:45 -0400
Subject: [PATCH 1/3] Delete legacy ReactiveUI.TransitioningContentControl

---
 .../TransitioningContentControl.cs            | 80 -------------------
 1 file changed, 80 deletions(-)
 delete mode 100644 src/Avalonia.ReactiveUI/TransitioningContentControl.cs

diff --git a/src/Avalonia.ReactiveUI/TransitioningContentControl.cs b/src/Avalonia.ReactiveUI/TransitioningContentControl.cs
deleted file mode 100644
index d26e90b2da..0000000000
--- a/src/Avalonia.ReactiveUI/TransitioningContentControl.cs
+++ /dev/null
@@ -1,80 +0,0 @@
-using System;
-using System.Threading;
-
-using Avalonia.Animation;
-using Avalonia.Controls;
-using Avalonia.Styling;
-
-namespace Avalonia.ReactiveUI
-{
-    /// <summary>
-    /// A ContentControl that animates the transition when its content is changed.
-    /// </summary>
-    [Obsolete("Use TransitioningContentControl in Avalonia.Controls namespace")]
-    public class TransitioningContentControl : ContentControl, IStyleable
-    {
-        /// <summary>
-        /// <see cref="AvaloniaProperty"/> for the <see cref="PageTransition"/> property.
-        /// </summary>
-        public static readonly StyledProperty<IPageTransition?> PageTransitionProperty =
-            AvaloniaProperty.Register<TransitioningContentControl, IPageTransition?>(nameof(PageTransition),
-                new CrossFade(TimeSpan.FromSeconds(0.5)));
-
-        /// <summary>
-        /// <see cref="AvaloniaProperty"/> for the <see cref="DefaultContent"/> property.
-        /// </summary>
-        public static readonly StyledProperty<object?> DefaultContentProperty =
-            AvaloniaProperty.Register<TransitioningContentControl, object?>(nameof(DefaultContent));
-
-        private CancellationTokenSource? _lastTransitionCts;
-
-        /// <summary>
-        /// Gets or sets the animation played when content appears and disappears.
-        /// </summary>
-        public IPageTransition? PageTransition
-        {
-            get => GetValue(PageTransitionProperty);
-            set => SetValue(PageTransitionProperty, value);
-        }
-
-        /// <summary>
-        /// Gets or sets the content displayed whenever there is no page currently routed.
-        /// </summary>
-        public object? DefaultContent
-        {
-            get => GetValue(DefaultContentProperty);
-            set => SetValue(DefaultContentProperty, value);
-        }
-
-        /// <summary>
-        /// Gets or sets the content with animation.
-        /// </summary>
-        public new object? Content
-        {
-            get => base.Content;
-            set => UpdateContentWithTransition(value);
-        }
-        
-        /// <summary>
-        /// TransitioningContentControl uses the default ContentControl 
-        /// template from Avalonia default theme.
-        /// </summary>
-        Type IStyleable.StyleKey => typeof(ContentControl);
-
-        /// <summary>
-        /// Updates the content with transitions.
-        /// </summary>
-        /// <param name="content">New content to set.</param>
-        private async void UpdateContentWithTransition(object? content)
-        {
-            _lastTransitionCts?.Cancel();
-            _lastTransitionCts = new CancellationTokenSource();
-
-            if (PageTransition != null)
-                await PageTransition.Start(this, null, true, _lastTransitionCts.Token);
-            base.Content = content;
-            if (PageTransition != null)
-                await PageTransition.Start(null, this, true, _lastTransitionCts.Token);
-        }
-    }
-}

From 748a25df0d8210c070c07dd9e0cd7a95ffa12e5f Mon Sep 17 00:00:00 2001
From: Max Katz <maxkatz6@outlook.com>
Date: Sat, 6 Aug 2022 22:38:36 -0400
Subject: [PATCH 2/3] Restore missing DefaultContentProperty prop

---
 src/Avalonia.ReactiveUI/RoutedViewHost.cs    | 15 +++++++++++++++
 src/Avalonia.ReactiveUI/ViewModelViewHost.cs | 18 ++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/Avalonia.ReactiveUI/RoutedViewHost.cs b/src/Avalonia.ReactiveUI/RoutedViewHost.cs
index 9269dc70f8..775014d419 100644
--- a/src/Avalonia.ReactiveUI/RoutedViewHost.cs
+++ b/src/Avalonia.ReactiveUI/RoutedViewHost.cs
@@ -64,6 +64,12 @@ namespace Avalonia.ReactiveUI
         public static readonly StyledProperty<string?> ViewContractProperty =
             AvaloniaProperty.Register<RoutedViewHost, string?>(nameof(ViewContract));
 
+        /// <summary>
+        /// <see cref="AvaloniaProperty"/> for the <see cref="DefaultContent"/> property.
+        /// </summary>
+        public static readonly StyledProperty<object?> DefaultContentProperty =
+            ViewModelViewHost.DefaultContentProperty.AddOwner<RoutedViewHost>();
+
         /// <summary>
         /// Initializes a new instance of the <see cref="RoutedViewHost"/> class.
         /// </summary>
@@ -106,6 +112,15 @@ namespace Avalonia.ReactiveUI
             set => SetValue(ViewContractProperty, value);
         }
 
+        /// <summary>
+        /// Gets or sets the content displayed whenever there is no page currently routed.
+        /// </summary>
+        public object? DefaultContent
+        {
+            get => GetValue(DefaultContentProperty);
+            set => SetValue(DefaultContentProperty, value);
+        }
+
         /// <summary>
         /// Gets or sets the ReactiveUI view locator used by this router.
         /// </summary>
diff --git a/src/Avalonia.ReactiveUI/ViewModelViewHost.cs b/src/Avalonia.ReactiveUI/ViewModelViewHost.cs
index 16dee00ebc..869238b377 100644
--- a/src/Avalonia.ReactiveUI/ViewModelViewHost.cs
+++ b/src/Avalonia.ReactiveUI/ViewModelViewHost.cs
@@ -1,5 +1,8 @@
 using System;
 using System.Reactive.Disposables;
+
+using Avalonia.Controls;
+
 using ReactiveUI;
 using Splat;
 
@@ -24,6 +27,12 @@ namespace Avalonia.ReactiveUI
         public static readonly StyledProperty<string?> ViewContractProperty =
             AvaloniaProperty.Register<ViewModelViewHost, string?>(nameof(ViewContract));
 
+        /// <summary>
+        /// <see cref="AvaloniaProperty"/> for the <see cref="DefaultContent"/> property.
+        /// </summary>
+        public static readonly StyledProperty<object?> DefaultContentProperty =
+            AvaloniaProperty.Register<ViewModelViewHost, object?>(nameof(DefaultContent));
+
         /// <summary>
         /// Initializes a new instance of the <see cref="ViewModelViewHost"/> class.
         /// </summary>
@@ -55,6 +64,15 @@ namespace Avalonia.ReactiveUI
             set => SetValue(ViewContractProperty, value);
         }
 
+        /// <summary>
+        /// Gets or sets the content displayed whenever there is no page currently routed.
+        /// </summary>
+        public object? DefaultContent
+        {
+            get => GetValue(DefaultContentProperty);
+            set => SetValue(DefaultContentProperty, value);
+        }
+
         /// <summary>
         /// Gets or sets the view locator.
         /// </summary>

From 8436e0f7624a050b7e256abcf7d7a1d8f5aae30d Mon Sep 17 00:00:00 2001
From: Max Katz <maxkatz6@outlook.com>
Date: Sun, 7 Aug 2022 01:32:48 -0400
Subject: [PATCH 3/3] Remove test that doesn't make sense anymore

---
 .../TransitioningContentControlTest.cs                    | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/tests/Avalonia.ReactiveUI.UnitTests/TransitioningContentControlTest.cs b/tests/Avalonia.ReactiveUI.UnitTests/TransitioningContentControlTest.cs
index 6ca617d2d4..daa3830b7d 100644
--- a/tests/Avalonia.ReactiveUI.UnitTests/TransitioningContentControlTest.cs
+++ b/tests/Avalonia.ReactiveUI.UnitTests/TransitioningContentControlTest.cs
@@ -12,14 +12,6 @@ namespace Avalonia.ReactiveUI.UnitTests
 {
     public class TransitioningContentControlTest
     {
-        [Fact]
-        public void Transitioning_Control_Should_Derive_Template_From_Content_Control()
-        {
-            var target = new TransitioningContentControl();
-            var stylable = (IStyledElement)target;
-            Assert.Equal(typeof(ContentControl),stylable.StyleKey);
-        }
-
         [Fact]
         public void Transitioning_Control_Template_Should_Be_Instantiated() 
         {