From eb4e741c487d0c0faacd5b2b4dc631b298808aaf Mon Sep 17 00:00:00 2001
From: John Lewin <lewin76@gmail.com>
Date: Mon, 24 Dec 2018 10:17:05 -0800
Subject: [PATCH] Fix auto arrange/selection quirks

- Issue MatterHackers/MatterControl#4111
Auto arrange does not work for multiple items
---
 MatterControlLib/PartPreviewWindow/View3D/SceneActions.cs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/MatterControlLib/PartPreviewWindow/View3D/SceneActions.cs b/MatterControlLib/PartPreviewWindow/View3D/SceneActions.cs
index b4fc490ee..314726f00 100644
--- a/MatterControlLib/PartPreviewWindow/View3D/SceneActions.cs
+++ b/MatterControlLib/PartPreviewWindow/View3D/SceneActions.cs
@@ -184,6 +184,9 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 		{
 			await Task.Run(() =>
 			{
+				// Clear selection to ensure all root level children are arranged on the bed
+				scene.SelectedItem = null;
+
 				PlatingHelper.ArrangeOnBed(scene.Children.ToList(), scene, bedCenter);
 			});
 		}