[Draft] fix diffuse color issue when creating arrays (#8436)

src/Mod/Draft/draftmake/make_array.py

@@ -39,6 +39,7 @@ from draftutils.translate import translate
 from draftobjects.array import Array
 
 if App.GuiUp:
+    from draftutils.todo import ToDo
     from draftviewproviders.view_array import ViewProviderDraftArray
     from draftviewproviders.view_draftlink import ViewProviderDraftLink
 
@@ -128,13 +129,13 @@ def make_array(base_object,
         if use_link:
             ViewProviderDraftLink(new_obj.ViewObject)
         else:
+            if new_obj.ArrayType == "circular":
+                new_obj.Proxy.execute(new_obj) # Updates Count which is required for correct DiffuseColor.
             ViewProviderDraftArray(new_obj.ViewObject)
             gui_utils.format_object(new_obj, new_obj.Base)
-
-            if hasattr(new_obj.Base.ViewObject, "DiffuseColor"):
-                if len(new_obj.Base.ViewObject.DiffuseColor) > 1:
-                    new_obj.ViewObject.Proxy.resetColors(new_obj.ViewObject)
-
+            new_obj.ViewObject.Proxy.resetColors(new_obj.ViewObject)
+            # Workaround to trigger update of DiffuseColor:
+            ToDo.delay(reapply_diffuse_color, new_obj.ViewObject)
         new_obj.Base.ViewObject.hide()
         gui_utils.select(new_obj)
 
@@ -154,4 +155,11 @@ def makeArray(baseobject,
                       arg1, arg2, arg3,
                       arg4, arg5, arg6, use_link)
 
+
+def reapply_diffuse_color(vobj):
+    try:
+        vobj.DiffuseColor = vobj.DiffuseColor
+    except:
+        pass
+
 ## @}