From 04760fb2a451bee70eb91c5507eea34cfee9242b Mon Sep 17 00:00:00 2001
From: John Lewin <lewin76@gmail.com>
Date: Wed, 3 Oct 2018 21:51:03 -0700
Subject: [PATCH] Ignore doubleclick if no workspace is active

- Issue MatterHackers/MCCentral#4223
Double clicking a part on the left bar before opening a printer throws an exception
---
 MatterControlLib/Library/Widgets/ListView/ListView.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MatterControlLib/Library/Widgets/ListView/ListView.cs b/MatterControlLib/Library/Widgets/ListView/ListView.cs
index b86aeacf7..f3c96c914 100644
--- a/MatterControlLib/Library/Widgets/ListView/ListView.cs
+++ b/MatterControlLib/Library/Widgets/ListView/ListView.cs
@@ -422,7 +422,7 @@ namespace MatterHackers.MatterControl.CustomWidgets
 					if (itemModel != null)
 					{
 						var activeContext = ApplicationController.Instance.DragDropData;
-						activeContext.SceneContext.AddToPlate(new[] { itemModel });
+						activeContext.SceneContext?.AddToPlate(new[] { itemModel });
 					}
 				}
 			});