Arch: Allow to turn off material color and object color syncing

src/Mod/Arch/ArchComponent.py

@@ -741,12 +741,19 @@ class ViewProviderComponent:
 
         vobj.Proxy = self
         self.Object = vobj.Object
+        self.setProperties(self,vobj)
+        
+    def setProperties(self,vobj):
+
+        if not "UseMaterialColor" in vobj.PropertiesList:
+            vobj.addProperty("App::PropertyBool","UseMaterialColor","Component",QT_TRANSLATE_NOOP("App::Property","Use the material color as this object's shape color, if available"))
+            vobj.UseMaterialColor = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Arch").GetBool("UseMaterialColor",True)
 
     def updateData(self,obj,prop):
 
         #print(obj.Name," : updating ",prop)
         if prop == "Material":
-            if obj.Material:
+            if obj.Material and ( (not hasattr(obj.ViewObject,"UseMaterialColor")) or obj.ViewObject.UseMaterialColor):
                 if hasattr(obj.Material,"Material"):
                     if 'DiffuseColor' in obj.Material.Material:
                         if "(" in obj.Material.Material['DiffuseColor']:

src/Mod/Arch/Resources/ui/preferences-arch.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>446</width>
-    <height>792</height>
+    <height>811</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -217,6 +217,19 @@
         </property>
        </widget>
       </item>
+      <item>
+       <widget class="Gui::PrefCheckBox" name="checkBox_6">
+        <property name="toolTip">
+         <string>If this is checked, when an Arch object has a material, the object will take the color of the material. This can be overridden for each object.</string>
+        </property>
+        <property name="text">
+         <string>Use material color as shape color</string>
+        </property>
+        <property name="checked">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
       <item>
        <layout class="QHBoxLayout" name="horizontalLayout_3">
         <item>