From fc709c3a0fc9b72b6eec7038b2be3adf8917c036 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@users.noreply.github.com>
Date: Fri, 7 Sep 2018 00:51:25 +0200
Subject: [PATCH] Partially fix tab strip orientation.

---
 src/Avalonia.Controls/TabControl.cs         |  2 +-
 src/Avalonia.Themes.Default/TabControl.xaml | 30 +++++++--------------
 2 files changed, 11 insertions(+), 21 deletions(-)

diff --git a/src/Avalonia.Controls/TabControl.cs b/src/Avalonia.Controls/TabControl.cs
index 043242543b..f81e1560c2 100644
--- a/src/Avalonia.Controls/TabControl.cs
+++ b/src/Avalonia.Controls/TabControl.cs
@@ -57,7 +57,7 @@ namespace Avalonia.Controls
         /// The default value for the <see cref="ItemsControl.ItemsPanel"/> property.
         /// </summary>
         private static readonly FuncTemplate<IPanel> DefaultPanel =
-            new FuncTemplate<IPanel>(() => new WrapPanel { Orientation = Orientation.Horizontal });
+            new FuncTemplate<IPanel>(() => new WrapPanel());
 
         internal ItemsPresenter ItemsPresenterPart { get; private set; }
 
diff --git a/src/Avalonia.Themes.Default/TabControl.xaml b/src/Avalonia.Themes.Default/TabControl.xaml
index 1e5b5c8841..e551b2e841 100644
--- a/src/Avalonia.Themes.Default/TabControl.xaml
+++ b/src/Avalonia.Themes.Default/TabControl.xaml
@@ -24,7 +24,6 @@
                         <DockPanel>
                             <ItemsPresenter
                                 Name="PART_ItemsPresenter"
-                                DockPanel.Dock="Top"
                                 Items="{TemplateBinding Items}"
                                 ItemsPanel="{TemplateBinding ItemsPanel}"
                                 ItemTemplate="{TemplateBinding ItemTemplate}"
@@ -44,31 +43,22 @@
             </ControlTemplate>
         </Setter>
     </Style>
+    <Style Selector="TabControl[TabStripPlacement=Top] /template/ ItemsPresenter#PART_ItemsPresenter">
+        <Setter Property="DockPanel.Dock" Value="Top"/>
+    </Style>
     <Style Selector="TabControl[TabStripPlacement=Bottom] /template/ ItemsPresenter#PART_ItemsPresenter">
         <Setter Property="DockPanel.Dock" Value="Bottom"/>
     </Style>
-    <Style Selector="TabControl[TabStripPlacement=Left]">
-        <Setter Property="ItemsPanel">
-            <Setter.Value>
-                <ItemsPanelTemplate>
-                    <StackPanel Orientation="Vertical"/>
-                </ItemsPanelTemplate>
-            </Setter.Value>
-        </Setter>
-    </Style>
     <Style Selector="TabControl[TabStripPlacement=Left] /template/ ItemsPresenter#PART_ItemsPresenter">
-        <Setter Property="DockPanel.Dock" Value="Left"/>       
+        <Setter Property="DockPanel.Dock" Value="Left"/>
     </Style>
-    <Style Selector="TabControl[TabStripPlacement=Right]">
-        <Setter Property="ItemsPanel">
-            <Setter.Value>
-                <ItemsPanelTemplate>
-                    <StackPanel Orientation="Vertical"/>
-                </ItemsPanelTemplate>
-            </Setter.Value>
-        </Setter>
+    <Style Selector="TabControl[TabStripPlacement=Left] /template/ ItemsPresenter#PART_ItemsPresenter > WrapPanel">
+        <Setter Property="Orientation" Value="Vertical"/>
     </Style>
     <Style Selector="TabControl[TabStripPlacement=Right] /template/ ItemsPresenter#PART_ItemsPresenter">
-        <Setter Property="DockPanel.Dock" Value="Right"/>       
+        <Setter Property="DockPanel.Dock" Value="Right"/>
+    </Style>
+    <Style Selector="TabControl[TabStripPlacement=Right] /template/ ItemsPresenter#PART_ItemsPresenter > WrapPanel">
+        <Setter Property="Orientation" Value="Vertical"/>
     </Style>
 </Styles>