From 5b11c9f8513b1bd8a4e970836f8023b15fd96077 Mon Sep 17 00:00:00 2001
From: Steven Kirk <steven.kirk@tricycleinc.com>
Date: Thu, 29 Jan 2015 14:56:42 +0100
Subject: [PATCH] Fix bug in tree view style.

ItemsPresenter didn't have an ID. Also don't return null for logical
children of an ItemsControl with no presenter.
---
 Perspex.Controls/ItemsControl.cs            | 6 ++++++
 Perspex.Themes.Default/TreeViewItemStyle.cs | 1 +
 2 files changed, 7 insertions(+)

diff --git a/Perspex.Controls/ItemsControl.cs b/Perspex.Controls/ItemsControl.cs
index 265314264a..08a4f2ba27 100644
--- a/Perspex.Controls/ItemsControl.cs
+++ b/Perspex.Controls/ItemsControl.cs
@@ -96,6 +96,12 @@ namespace Perspex.Controls
                     panel.VisualChildren,
                     x => (ILogical)x);
             }
+            else
+            {
+                this.logicalChildren = new PerspexReadOnlyListView<IVisual, ILogical>(
+                    new PerspexList<IVisual>(),
+                    x => (ILogical)x);
+            }
         }
 
         private void ItemsChanged(Tuple<IEnumerable, IEnumerable> value)
diff --git a/Perspex.Themes.Default/TreeViewItemStyle.cs b/Perspex.Themes.Default/TreeViewItemStyle.cs
index b1123ce262..a3a830b28c 100644
--- a/Perspex.Themes.Default/TreeViewItemStyle.cs
+++ b/Perspex.Themes.Default/TreeViewItemStyle.cs
@@ -101,6 +101,7 @@ namespace Perspex.Themes.Default
                     },
                     new ItemsPresenter
                     {
+                        Id = "itemsPresenter",
                         Margin = new Thickness(24, 0, 0, 0),
                         [~ItemsPresenter.ItemsProperty] = control[~TreeViewItem.ItemsProperty],
                         [~ItemsPresenter.ItemsPanelProperty] = control[~TreeViewItem.ItemsPanelProperty],