From cfaa90b1fbb8d3b6e2a29e0112418145cbbc032d Mon Sep 17 00:00:00 2001
From: Dion Moult <dion@thinkmoult.com>
Date: Mon, 8 Mar 2021 12:11:29 +1100
Subject: [PATCH] Fix bug where material / style UI was showing without a
 loaded IFC

---
 src/ifcblenderexport/blenderbim/bim/module/material/ui.py | 4 ++++
 src/ifcblenderexport/blenderbim/bim/module/style/ui.py    | 7 ++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/ifcblenderexport/blenderbim/bim/module/material/ui.py b/src/ifcblenderexport/blenderbim/bim/module/material/ui.py
index 9c702843c3..1aec18d6c1 100644
--- a/src/ifcblenderexport/blenderbim/bim/module/material/ui.py
+++ b/src/ifcblenderexport/blenderbim/bim/module/material/ui.py
@@ -10,6 +10,10 @@ class BIM_PT_material(Panel):
     bl_region_type = "WINDOW"
     bl_context = "material"
 
+    @classmethod
+    def poll(cls, context):
+        return IfcStore.get_file()
+
     def draw(self, context):
         row = self.layout.row()
         if bool(context.active_object.active_material.BIMObjectProperties.ifc_definition_id):
diff --git a/src/ifcblenderexport/blenderbim/bim/module/style/ui.py b/src/ifcblenderexport/blenderbim/bim/module/style/ui.py
index 05cfa2da97..408e42a846 100644
--- a/src/ifcblenderexport/blenderbim/bim/module/style/ui.py
+++ b/src/ifcblenderexport/blenderbim/bim/module/style/ui.py
@@ -1,4 +1,5 @@
 from bpy.types import Panel
+from blenderbim.bim.ifc import IfcStore
 
 
 class BIM_PT_style(Panel):
@@ -10,7 +11,11 @@ class BIM_PT_style(Panel):
 
     @classmethod
     def poll(cls, context):
-        return context.active_object is not None and context.active_object.active_material is not None
+        return (
+            IfcStore.get_file()
+            and context.active_object is not None
+            and context.active_object.active_material is not None
+        )
 
     def draw(self, context):
         props = context.active_object.active_material.BIMMaterialProperties