Enable selecting a container's children from the IFC Spatial Manager panel

src/blenderbim/blenderbim/bim/module/spatial/__init__.py

@@ -37,6 +37,7 @@ classes = (
     operator.ContractContainer,
     operator.ExpandContainer,
     operator.DeleteContainer,
+    operator.SelectDecomposedElements,
     prop.SpatialElement,
     prop.BIMSpatialProperties,
     prop.BIMObjectSpatialProperties,

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

@@ -246,3 +246,13 @@ class AddBuildingStorey(bpy.types.Operator, tool.Ifc.Operator):
             part_name="Unnamed",
         )
         core.load_container_manager(tool.Spatial)
+
+
+class SelectDecomposedElements(bpy.types.Operator, tool.Ifc.Operator):
+    bl_idname = "bim.select_decomposed_elements"
+    bl_label = "Select Children"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def _execute(self, context):
+        core.select_decomposed_elements(tool.Spatial)
+        return {"FINISHED"}

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

@@ -119,6 +119,7 @@ class BIM_PT_SpatialManager(Panel):
             ifc_definition_id = self.props.containers[self.props.active_container_index].ifc_definition_id
             row = self.layout.row()
             row.alignment = "RIGHT"
+            row.operator("bim.select_decomposed_elements", icon="RESTRICT_SELECT_OFF", text="Select Children")
             if SpatialData.data["containers"][ifc_definition_id]["type"] in ["IfcBuildingStorey", "IfcBuilding"]:
                 row.operator("bim.add_building_storey", icon="ADD", text="Add storey").part_class = "IfcBuildingStorey"
             row.operator("bim.delete_container", icon="X", text="Delete").container = ifc_definition_id

src/blenderbim/blenderbim/core/spatial.py

@@ -115,3 +115,8 @@ def expand_container(spatial, container=None):
 def delete_container(ifc, spatial, geometry, container=None):
     geometry.delete_ifc_object(ifc.get_object(container))
     spatial.load_container_manager()
+
+def select_decomposed_elements(spatial):
+    container = spatial.get_active_container()
+    if container:
+        spatial.select_products(spatial.get_decomposed_elements(container))

src/blenderbim/blenderbim/tool/spatial.py

@@ -203,7 +203,7 @@ class Spatial(blenderbim.core.tool.Spatial):
         cls.props.is_container_update_enabled = False
         parent = tool.Ifc.get().by_type("IfcProject")[0]
 
-        for object in ifcopenshell.util.element.get_parts(parent):
+        for object in ifcopenshell.util.element.get_parts(parent) or []:
             if object.is_a("IfcSpatialElement"):
                 cls.create_new_storey_li(object, 0)
         cls.props.is_container_update_enabled = True
@@ -222,7 +222,7 @@ class Spatial(blenderbim.core.tool.Spatial):
         if new.has_decomposition:
             new.has_children = True
             if new.is_expanded:
-                for related_object in ifcopenshell.util.element.get_parts(element):
+                for related_object in ifcopenshell.util.element.get_parts(element) or []:
                     if related_object.is_a("IfcSpatialElement"):
                         cls.create_new_storey_li(related_object, level_index + 1)