You can now make the selected element in the spatial decomposition panel active

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

@@ -33,6 +33,7 @@ classes = (
     operator.ReferenceStructure,
     operator.RemoveContainer,
     operator.SelectContainer,
+    operator.SelectDecomposedElement,
     operator.SelectDecomposedElements,
     operator.SelectProduct,
     operator.SelectSimilarContainer,

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

@@ -265,6 +265,17 @@ class ToggleContainerElement(bpy.types.Operator):
         return {"FINISHED"}
 
 
+class SelectDecomposedElement(bpy.types.Operator, tool.Ifc.Operator):
+    bl_idname = "bim.select_decomposed_element"
+    bl_label = "Select Decomposed Element"
+    bl_options = {"REGISTER", "UNDO"}
+    element: bpy.props.IntProperty()
+
+    def _execute(self, context):
+        if self.element:
+            core.select_decomposed_element(tool.Ifc, tool.Spatial, element=tool.Ifc.get().by_id(self.element))
+
+
 class SelectDecomposedElements(bpy.types.Operator, tool.Ifc.Operator):
     bl_idname = "bim.select_decomposed_elements"
     bl_label = "Select Children"

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

@@ -171,6 +171,11 @@ class BIM_PT_spatial_decomposition(Panel):
         )
         row.prop(self.props, "should_include_children", text="", icon="OUTLINER")
         row.operator("bim.assign_container", icon="FOLDER_REDIRECT", text="").container = ifc_definition_id
+        op = row.operator("bim.select_decomposed_element", icon="OBJECT_DATA", text="")
+        if active_element := self.props.active_element:
+            op.element = active_element.ifc_definition_id
+        else:
+            op.element = 0
         op = row.operator("bim.select_decomposed_elements", icon="RESTRICT_SELECT_OFF", text="")
         op.container = ifc_definition_id
 

src/bonsai/bonsai/core/spatial.py

@@ -159,6 +159,10 @@ def select_decomposed_elements(
     spatial.select_products(elements)
 
 
+def select_decomposed_element(ifc: tool.Ifc, spatial: tool.Spatial, element: ifcopenshell.entity_instance) -> None:
+    spatial.set_active_object(ifc.get_object(element))
+
+
 def generate_space(ifc: tool.Ifc, model: tool.Model, root: tool.Root, spatial: tool.Spatial, type: tool.Type) -> None:
     if not root.get_default_container():
         raise NoDefaultContainer()