Fix #4484. Clarify inheritance rules of predefined types.

src/blenderbim/blenderbim/bim/module/root/data.py

@@ -42,6 +42,7 @@ class IfcClassData:
         cls.data["contexts"] = cls.contexts()
         cls.data["has_entity"] = cls.has_entity()
         cls.data["name"] = cls.name()
+        cls.data["has_inherited_predefined_type"] = cls.has_inherited_predefined_type()
         cls.data["ifc_class"] = cls.ifc_class()
         cls.data["ifc_predefined_types"] = cls.ifc_predefined_types()
         cls.data["can_reassign_class"] = cls.can_reassign_class()
@@ -162,6 +163,15 @@ class IfcClassData:
             name += f"[{predefined_type}]"
         return name
 
+    @classmethod
+    def has_inherited_predefined_type(cls):
+        element = tool.Ifc.get_entity(bpy.context.view_layer.objects.active)
+        if not element:
+            return
+        if element_type := ifcopenshell.util.element.get_type(element):
+            return ifcopenshell.util.element.get_predefined_type(element_type) != "NOTDEFINED"
+        return False
+
     @classmethod
     def ifc_class(cls):
         element = tool.Ifc.get_entity(bpy.context.view_layer.objects.active)

src/blenderbim/blenderbim/bim/module/root/ui.py

@@ -61,7 +61,10 @@ class BIM_PT_class(Panel):
                 self.layout.prop(context.scene.BIMRootProperties, "relating_class_object", icon="COPYDOWN")
             else:
                 row = self.layout.row(align=True)
-                row.label(text=IfcClassData.data["name"])
+                row.label(
+                    text=IfcClassData.data["name"],
+                    icon="CON_CHILDOF" if IfcClassData.data["has_inherited_predefined_type"] else "NONE",
+                )
                 row.operator("bim.select_ifc_class", text="", icon="RESTRICT_SELECT_OFF")
                 row.operator("bim.unlink_object", icon="UNLINKED", text="")
                 if IfcClassData.data["can_reassign_class"]: