From 267082b2bee9c0dd2c855e077d03ea06b288766a Mon Sep 17 00:00:00 2001
From: John Lewin <lewin76@gmail.com>
Date: Sat, 7 Apr 2018 14:26:24 -0700
Subject: [PATCH] Only call Invalidate on change

- Issue MatterHackers/MCCentral#3067
Hang on MatterControl close if Extruder/Bed popup open
---
 PartPreviewWindow/RoundedToggleSwitch.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/PartPreviewWindow/RoundedToggleSwitch.cs b/PartPreviewWindow/RoundedToggleSwitch.cs
index ae013a8ca..09e4a1d5d 100644
--- a/PartPreviewWindow/RoundedToggleSwitch.cs
+++ b/PartPreviewWindow/RoundedToggleSwitch.cs
@@ -60,8 +60,11 @@ namespace MatterHackers.MatterControl.CustomWidgets
 			get => _checked;
 			set
 			{
-				_checked = value;
-				this.Invalidate();
+				if (_checked != value)
+				{
+					_checked = value;
+					this.Invalidate();
+				}
 			}
 		}