Merge pull request #11280 from Roy-043/Arch-Fix-issue-with-getSceneGraph

Arch: Fix issue with getSceneGraph

src/Mod/Arch/ArchBuildingPart.py

@@ -807,7 +807,9 @@ class ViewProviderBuildingPart:
                         if hasattr(vobj,prop) and hasattr(child.ViewObject,prop[8:]) and not hasattr(child,"ChildrenOverride"):
                             setattr(child.ViewObject,prop[8:],getattr(vobj,prop))
         elif prop in ["CutView","CutMargin"]:
-            if hasattr(vobj,"CutView") and FreeCADGui.ActiveDocument.ActiveView:
+            if hasattr(vobj, "CutView") \
+                    and FreeCADGui.ActiveDocument.ActiveView \
+                    and hasattr(FreeCADGui.ActiveDocument.ActiveView, "getSceneGraph"):
                 sg = FreeCADGui.ActiveDocument.ActiveView.getSceneGraph()
                 if vobj.CutView:
                     from pivy import coin

src/Mod/Arch/ArchSite.py

@@ -1164,6 +1164,11 @@ class _ViewProviderSite:
 
         if hasattr(self, 'trueNorthRotation') and self.trueNorthRotation is not None:
             return
+        if not FreeCADGui.ActiveDocument.ActiveView:
+            return
+        if not hasattr(FreeCADGui.ActiveDocument.ActiveView, 'getSceneGraph'):
+            return
+
         from pivy import coin
         self.trueNorthRotation = coin.SoTransform()
         sg = FreeCADGui.ActiveDocument.ActiveView.getSceneGraph()
@@ -1172,10 +1177,18 @@ class _ViewProviderSite:
 
     def removeTrueNorthRotation(self):
 
-        if hasattr(self, 'trueNorthRotation') and self.trueNorthRotation is not None:
-            sg = FreeCADGui.ActiveDocument.ActiveView.getSceneGraph()
-            sg.removeChild(self.trueNorthRotation)
-            self.trueNorthRotation = None
+        if not hasattr(self, 'trueNorthRotation'):
+            return
+        if self.trueNorthRotation is None:
+            return
+        if not FreeCADGui.ActiveDocument.ActiveView:
+            return
+        if not hasattr(FreeCADGui.ActiveDocument.ActiveView, 'getSceneGraph'):
+            return
+
+        sg = FreeCADGui.ActiveDocument.ActiveView.getSceneGraph()
+        sg.removeChild(self.trueNorthRotation)
+        self.trueNorthRotation = None
 
     def updateTrueNorthRotation(self):