Create interface panel to select external materials

src/ifcblenderexport/io_export_ifc/__init__.py

@@ -29,8 +29,10 @@ classes = (
     operator.SelectAudited,
     operator.RejectElement,
     ui.BIMProperties,
+    ui.MaterialProperties,
     ui.BIMPanel,
     ui.MVDPanel,
+    ui.MaterialPanel,
     )
 
 def menu_func_export(self, context):
@@ -47,6 +49,7 @@ def register():
     bpy.types.TOPBAR_MT_file_export.append(menu_func_export)
     bpy.types.TOPBAR_MT_file_import.append(menu_func_import)
     bpy.types.Scene.BIMProperties = bpy.props.PointerProperty(type=ui.BIMProperties)
+    bpy.types.Material.MaterialProperties = bpy.props.PointerProperty(type=ui.MaterialProperties)
 
 def unregister():
     for cls in reversed(classes):
@@ -54,6 +57,7 @@ def unregister():
     bpy.types.TOPBAR_MT_file_export.remove(menu_func_export)
     bpy.types.TOPBAR_MT_file_import.remove(menu_func_import)
     del(bpy.types.Scene.BIMProperties)
+    del(bpy.types.Scene.MaterialProperties)
 
 if __name__ == "__main__":
     register()

src/ifcblenderexport/io_export_ifc/export_ifc.py

@@ -1064,7 +1064,7 @@ class IfcExporter():
     def create_styled_item(self, item, representation_item=None):
         styles = []
         styles.append(self.create_surface_style_rendering(item))
-        if 'IsExternal' in item['raw'].keys():
+        if item['raw'].MaterialProperties.is_external:
             styles.append(self.file.create_entity('IfcExternallyDefinedSurfaceStyle',
                 **self.get_material_external_definition(item['raw'])))
         surface_style = self.file.createIfcSurfaceStyle(None, 'BOTH', styles)
@@ -1105,9 +1105,9 @@ class IfcExporter():
 
     def get_material_external_definition(self, material):
         return {
-            'Location': material['Location'],
-            'Identification': material['Identification'] if 'Identification' in material else material.name,
-            'Name': material['Name'] if 'Name' in material else material.name
+            'Location': material.MaterialProperties.location,
+            'Identification': material.MaterialProperties.identification if material.MaterialProperties.identification else material.name,
+            'Name': material.MaterialProperties.name if material.MaterialProperties.name else material.name
         }
 
     def create_colour_rgb(self, colour):

src/ifcblenderexport/io_export_ifc/ui.py

@@ -35,9 +35,35 @@ class BIMProperties(bpy.types.PropertyGroup):
     export_has_representations: bpy.props.BoolProperty(name="Export Representations", default=True)
     qa_reject_element_reason: bpy.props.StringProperty(name="Element rejection reason")
 
+class MaterialProperties(bpy.types.PropertyGroup):
+    is_external: bpy.props.BoolProperty(name="Has External Definition")
+    location: bpy.props.StringProperty(name="Location")
+    identification: bpy.props.StringProperty(name="Identification")
+    name: bpy.props.StringProperty(name="Name")
+
+class MaterialPanel(bpy.types.Panel):
+    bl_label = 'IFC Materials'
+    bl_idname = 'BIM_PT_material'
+    bl_space_type = 'PROPERTIES'
+    bl_region_type = 'WINDOW'
+    bl_context = 'material'
+
+    def draw(self, context):
+        if not bpy.context.active_object.active_material:
+            return
+        layout = self.layout
+        row = layout.row()
+        row.prop(bpy.context.active_object.active_material.MaterialProperties, 'is_external')
+        row = layout.row()
+        row.prop(bpy.context.active_object.active_material.MaterialProperties, 'location')
+        row = layout.row()
+        row.prop(bpy.context.active_object.active_material.MaterialProperties, 'identification')
+        row = layout.row()
+        row.prop(bpy.context.active_object.active_material.MaterialProperties, 'name')
+
 class BIMPanel(bpy.types.Panel):
     bl_label = "Building Information Modeling"
-    bl_idname = "bim.panel"
+    bl_idname = "BIM_PT_bim"
     bl_space_type = 'PROPERTIES'
     bl_region_type = 'WINDOW'
     bl_context = "scene"
@@ -95,7 +121,7 @@ class BIMPanel(bpy.types.Panel):
 
 class MVDPanel(bpy.types.Panel):
     bl_label = "Model View Definitions"
-    bl_idname = "mvd.panel"
+    bl_idname = "BIM_PT_mvd"
     bl_space_type = 'PROPERTIES'
     bl_region_type = 'WINDOW'
     bl_context = "scene"