From 2f22ac91078c859e848d072ddbf13650bb78a0eb Mon Sep 17 00:00:00 2001
From: John Lewin <lewin76@gmail.com>
Date: Fri, 29 Sep 2017 21:34:04 -0700
Subject: [PATCH] Spin up new generator tasks on queued work when past ones
 have completed

---
 ApplicationView/ApplicationController.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ApplicationView/ApplicationController.cs b/ApplicationView/ApplicationController.cs
index e366af141..f26f36da3 100644
--- a/ApplicationView/ApplicationController.cs
+++ b/ApplicationView/ApplicationController.cs
@@ -195,7 +195,8 @@ namespace MatterHackers.MatterControl
 		{
 			lock(thumbsLock)
 			{
-				if (thumbnailGenerator == null)
+				if (thumbnailGenerator == null
+					|| thumbnailGenerator.IsCompleted)
 				{
 					// Spin up a new thread once needed
 					thumbnailGenerator = Task.Run((Action)ThumbGeneration);