You can now filter imported objects by IFC class when loading a project

src/blenderbim/blenderbim/bim/import_ifc.py

@@ -561,6 +561,8 @@ class IfcImporter:
         print("Done creating geometry")
 
     def create_products(self):
+        if self.ifc_import_settings.has_filter and not self.iterator_elements:
+            return
         if self.ifc_import_settings.should_use_cpu_multiprocessing:
             iterator = ifcopenshell.geom.iterator(
                 self.settings,

src/blenderbim/blenderbim/bim/module/project/operator.py

@@ -558,6 +558,8 @@ class LoadProjectElements(bpy.types.Operator):
         settings.has_filter = self.props.filter_mode != "NONE"
         if self.props.filter_mode == "DECOMPOSITION":
             settings.elements = self.get_decomposition_elements()
+        elif self.props.filter_mode == "IFC_CLASS":
+            settings.elements = self.get_ifc_class_elements()
         settings.logger.info("Starting import")
         ifc_importer = import_ifc.IfcImporter(settings)
         ifc_importer.execute()
@@ -581,4 +583,12 @@ class LoadProjectElements(bpy.types.Operator):
         for container in containers:
             for rel in container.ContainsElements:
                 elements.update(rel.RelatedElements)
-        return list(elements)
+        return elements
+
+    def get_ifc_class_elements(self):
+        elements = set()
+        for filter_category in self.props.filter_categories:
+            if not filter_category.is_selected:
+                continue
+            elements.update(self.file.by_type(filter_category.name, include_subtypes=False))
+        return elements

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

@@ -43,6 +43,11 @@ def update_filter_mode(self, context):
             new.name = "{}/{}".format(element.is_a(), element.Name or "Unnamed")
             new.ifc_definition_id = element.id()
             new.total_elements = sum([len(r.RelatedElements) for r in element.ContainsElements])
+    elif self.filter_mode == "IFC_CLASS":
+        for ifc_class in sorted(list(set([e.is_a() for e in file.by_type("IfcElement")]))):
+            new = self.filter_categories.add()
+            new.name = ifc_class
+            new.total_elements = len(file.by_type(ifc_class, include_subtypes=False))
 
 
 class LibraryElement(PropertyGroup):

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

@@ -47,7 +47,7 @@ class BIM_PT_project(Panel):
         row.prop(pprops, "collection_mode")
         row = self.layout.row()
         row.prop(pprops, "filter_mode")
-        if pprops.filter_mode == "DECOMPOSITION":
+        if pprops.filter_mode != "NONE":
             self.layout.template_list(
                 "BIM_UL_filter_categories",
                 "",

src/blenderbim/test/bim/module/project/test_operator.py

@@ -95,6 +95,46 @@ class TestLoadProjectElements(test.bim.bootstrap.NewFile):
         And the object "IfcWall/Wall" does not exist
         """
 
+    @test.bim.bootstrap.scenario
+    def test_loading_objects_filtered_by_ifc_class(self):
+        return """
+        Given I press "bim.load_project(filepath='{cwd}/test/files/basic.ifc')"
+        When I set "scene.BIMProjectProperties.collection_mode" to "DECOMPOSITION"
+        And I set "scene.BIMProjectProperties.filter_mode" to "IFC_CLASS"
+        Then "scene.BIMProjectProperties.filter_categories['IfcWall'].total_elements" is "1"
+        And "scene.BIMProjectProperties.filter_categories['IfcSlab'].total_elements" is "1"
+        When I set "scene.BIMProjectProperties.filter_categories['IfcSlab'].is_selected" to "True"
+        And I press "bim.load_project_elements"
+        Then the object "IfcProject/My Project" is an "IfcProject"
+        And the object "IfcSite/My Site" is an "IfcSite"
+        And the object "IfcBuilding/My Building" is an "IfcBuilding"
+        And the object "IfcBuildingStorey/Ground Floor" is an "IfcBuildingStorey"
+        And the object "IfcSlab/Slab" is an "IfcSlab"
+        And the object "IfcSite/My Site" is in the collection "IfcSite/My Site"
+        And the object "IfcBuilding/My Building" is in the collection "IfcBuilding/My Building"
+        And the object "IfcBuildingStorey/Ground Floor" is in the collection "IfcBuildingStorey/Ground Floor"
+        And the object "IfcSlab/Slab" is in the collection "IfcBuildingStorey/Ground Floor"
+        And the object "IfcBuildingStorey/Level 1" does not exist
+        And the object "IfcWall/Wall" does not exist
+        """
+
+    @test.bim.bootstrap.scenario
+    def test_loading_no_objects_due_to_filter(self):
+        return """
+        Given I press "bim.load_project(filepath='{cwd}/test/files/basic.ifc')"
+        When I set "scene.BIMProjectProperties.collection_mode" to "DECOMPOSITION"
+        And I set "scene.BIMProjectProperties.filter_mode" to "IFC_CLASS"
+        And I press "bim.load_project_elements"
+        Then the object "IfcProject/My Project" is an "IfcProject"
+        And the object "IfcSite/My Site" does not exist
+        And the object "IfcBuilding/My Building" does not exist
+        And the object "IfcBuildingStorey/Ground Floor" does not exist
+        And the object "IfcBuildingStorey/Level 1" does not exist
+        And the object "IfcSlab/Slab" does not exist
+        And the object "IfcWall/Wall" does not exist
+        """
+
+
 class TestUnloadProject(test.bim.bootstrap.NewFile):
     @test.bim.bootstrap.scenario
     def test_unloading_a_project(self):