Material total now shows the total of the select material class, not all material classes

This is more meaningful. Often the presence of sets will inflate the number artificially.

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

@@ -36,31 +36,17 @@ class MaterialsData:
 
     @classmethod
     def load(cls):
-        cls.data = {
-            "total_materials": cls.total_materials(),
-            "material_types": cls.material_types(),
-            "profiles": cls.profiles(),
-            "styles": cls.styles(),
-            "contexts": cls.contexts(),
-            "active_styles": cls.active_styles(),
-        }
         cls.is_loaded = True
+        cls.data["material_types"] = cls.material_types()
+        cls.data["total_materials"] = cls.total_materials()
+        cls.data["profiles"] = cls.profiles()
+        cls.data["styles"] = cls.styles()
+        cls.data["contexts"] = cls.contexts()
+        cls.data["active_styles"] = cls.active_styles()
 
     @classmethod
     def total_materials(cls):
-        if tool.Ifc.get_schema() == "IFC2X3":
+        return len(tool.Ifc.get().by_type(bpy.context.scene.BIMMaterialProperties.material_type))
-            return (
-                len(tool.Ifc.get().by_type("IfcMaterial"))
-                + len(tool.Ifc.get().by_type("IfcMaterialLayerSet"))
-                + len(tool.Ifc.get().by_type("IfcMaterialList"))
-            )
-        return (
-            len(tool.Ifc.get().by_type("IfcMaterial"))
-            + len(tool.Ifc.get().by_type("IfcMaterialConstituentSet"))
-            + len(tool.Ifc.get().by_type("IfcMaterialLayerSet"))
-            + len(tool.Ifc.get().by_type("IfcMaterialProfileSet"))
-            + len(tool.Ifc.get().by_type("IfcMaterialList"))
-        )
 
     @classmethod
     def material_types(cls):

src/blenderbim/blenderbim/bim/module/material/prop.py

@@ -97,6 +97,10 @@ def get_material_types(self, context):
     return MaterialsData.data["material_types"]
 
 
+def update_material_type(self, context):
+    MaterialsData.data["total_materials"] = MaterialsData.total_materials()
+
+
 def get_profiles(self, context):
     if not MaterialsData.is_loaded:
         MaterialsData.load()
@@ -126,7 +130,7 @@ class Material(PropertyGroup):
 
 class BIMMaterialProperties(PropertyGroup):
     is_editing: BoolProperty(name="Is Editing", default=False)
-    material_type: EnumProperty(items=get_material_types, name="Material Type")
+    material_type: EnumProperty(items=get_material_types, update=update_material_type, name="Material Type")
     materials: CollectionProperty(name="Materials", type=Material)
     active_material_index: IntProperty(name="Active Material Index")
     profiles: EnumProperty(items=get_profiles, name="Profiles")

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

@@ -45,7 +45,7 @@ class BIM_PT_materials(Panel):
         self.props = context.scene.BIMMaterialProperties
 
         row = self.layout.row(align=True)
-        row.label(text="{} Materials".format(MaterialsData.data["total_materials"]), icon="NODE_MATERIAL")
+        row.label(text=f"{MaterialsData.data['total_materials']} Materials", icon="NODE_MATERIAL")
         if self.props.is_editing:
             row.operator("bim.disable_editing_materials", text="", icon="CANCEL")
         else: