From 68792668ada4ad6cc2ecb10ada5fc6451d0779ac Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Mon, 13 Jul 2020 19:23:00 +0200
Subject: [PATCH] Make items be materialized only once.

When virtualization was turned off in an `ItemsControl`, items were virtualized twice. on control creation. Fix that.
---
 src/Avalonia.Controls/Presenters/CarouselPresenter.cs  | 5 +++++
 src/Avalonia.Controls/Presenters/ItemsPresenterBase.cs | 2 --
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Controls/Presenters/CarouselPresenter.cs b/src/Avalonia.Controls/Presenters/CarouselPresenter.cs
index 70a7583daf..7888249bdd 100644
--- a/src/Avalonia.Controls/Presenters/CarouselPresenter.cs
+++ b/src/Avalonia.Controls/Presenters/CarouselPresenter.cs
@@ -155,6 +155,11 @@ namespace Avalonia.Controls.Presenters
             }
         }
 
+        protected override void PanelCreated(IPanel panel)
+        {
+            ItemsChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
+        }
+
         /// <summary>
         /// Moves to the selected page, animating if a <see cref="PageTransition"/> is set.
         /// </summary>
diff --git a/src/Avalonia.Controls/Presenters/ItemsPresenterBase.cs b/src/Avalonia.Controls/Presenters/ItemsPresenterBase.cs
index 23846bcd2e..52f173fc71 100644
--- a/src/Avalonia.Controls/Presenters/ItemsPresenterBase.cs
+++ b/src/Avalonia.Controls/Presenters/ItemsPresenterBase.cs
@@ -229,8 +229,6 @@ namespace Avalonia.Controls.Presenters
             }
 
             PanelCreated(Panel);
-
-            ItemsChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
         }
 
         /// <summary>