From b19fed42e3ee09b3c8432ec977ac5f48f7050ae9 Mon Sep 17 00:00:00 2001
From: Roy-043 <info@b-k-g.nl>
Date: Wed, 8 Nov 2023 16:36:31 +0100
Subject: [PATCH] Arch: start and stop WP view observer

See #11257.
---
 src/Mod/Arch/InitGui.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Mod/Arch/InitGui.py b/src/Mod/Arch/InitGui.py
index 7fb0c07e2b..d94817c448 100644
--- a/src/Mod/Arch/InitGui.py
+++ b/src/Mod/Arch/InitGui.py
@@ -228,6 +228,8 @@ class ArchWorkbench(FreeCADGui.Workbench):
             FreeCADGui.draftToolBar.Activated()
         if hasattr(FreeCADGui, "Snapper"):
             FreeCADGui.Snapper.show()
+        import WorkingPlane
+        WorkingPlane._view_observer_start()
         FreeCAD.Console.PrintLog("Arch workbench activated.\n")
 
     def Deactivated(self):
@@ -236,6 +238,8 @@ class ArchWorkbench(FreeCADGui.Workbench):
             FreeCADGui.draftToolBar.Deactivated()
         if hasattr(FreeCADGui, "Snapper"):
             FreeCADGui.Snapper.hide()
+        import WorkingPlane
+        WorkingPlane._view_observer_stop()
         FreeCAD.Console.PrintLog("Arch workbench deactivated.\n")
 
     def ContextMenu(self, recipient):