From 83098e99233abd9f34f36e1fa33c68d294e9f791 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Thu, 30 Apr 2020 15:29:24 +0200
Subject: [PATCH] Enable transitions for non-Visuals.

`Visual` knows when it's attached to the visual tree, so it can enable transitions then.

This is a hack due to the fact that non-Visuals currently don't know when to enable transitions.
---
 src/Avalonia.Animation/Animatable.cs | 2 +-
 src/Avalonia.Visuals/Visual.cs       | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Avalonia.Animation/Animatable.cs b/src/Avalonia.Animation/Animatable.cs
index 31670454c9..7d6df716b8 100644
--- a/src/Avalonia.Animation/Animatable.cs
+++ b/src/Avalonia.Animation/Animatable.cs
@@ -28,7 +28,7 @@ namespace Avalonia.Animation
                 o => o.Transitions,
                 (o, v) => o.Transitions = v);
 
-        private bool _transitionsEnabled;
+        private bool _transitionsEnabled = true;
         private Transitions? _transitions;
         private Dictionary<ITransition, TransitionState>? _transitionState;
 
diff --git a/src/Avalonia.Visuals/Visual.cs b/src/Avalonia.Visuals/Visual.cs
index 4d96fff3f6..bb9a4cf208 100644
--- a/src/Avalonia.Visuals/Visual.cs
+++ b/src/Avalonia.Visuals/Visual.cs
@@ -114,6 +114,9 @@ namespace Avalonia
         /// </summary>
         public Visual()
         {
+            // Disable transitions until we're added to the visual tree.
+            DisableTransitions();
+
             var visualChildren = new AvaloniaList<IVisual>();
             visualChildren.ResetBehavior = ResetBehavior.Remove;
             visualChildren.Validate = visual => ValidateVisualChild(visual);