Fix #2285. You can now get all the elements in a presentation layer.

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

@@ -20,14 +20,15 @@ import bpy
 from . import ui, prop, operator
 
 classes = (
-    operator.LoadLayers,
-    operator.DisableLayerEditingUI,
-    operator.EnableEditingLayer,
-    operator.DisableEditingLayer,
     operator.AddPresentationLayer,
-    operator.EditPresentationLayer,
-    operator.RemovePresentationLayer,
     operator.AssignPresentationLayer,
+    operator.DisableEditingLayer,
+    operator.DisableLayerEditingUI,
+    operator.EditPresentationLayer,
+    operator.EnableEditingLayer,
+    operator.LoadLayers,
+    operator.RemovePresentationLayer,
+    operator.SelectLayerProducts,
     operator.UnassignPresentationLayer,
     prop.Layer,
     prop.BIMLayerProperties,

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

@@ -18,9 +18,11 @@
 
 import bpy
 import json
-import ifcopenshell.util.attribute
 import ifcopenshell.api
+import ifcopenshell.util.element
+import ifcopenshell.util.attribute
 import blenderbim.bim.helper
+import blenderbim.tool as tool
 from blenderbim.bim.ifc import IfcStore
 from ifcopenshell.api.layer.data import Data
 
@@ -182,3 +184,19 @@ class UnassignPresentationLayer(bpy.types.Operator):
         )
         Data.load(IfcStore.get_file())
         return {"FINISHED"}
+
+
+class SelectLayerProducts(bpy.types.Operator):
+    bl_idname = "bim.select_layer_products"
+    bl_label = "Select Layer Products"
+    bl_options = {"REGISTER", "UNDO"}
+    layer: bpy.props.IntProperty()
+
+    def execute(self, context):
+        elements = ifcopenshell.util.element.get_elements_by_layer(tool.Ifc.get(), tool.Ifc.get().by_id(self.layer))
+        for obj in context.visible_objects:
+            obj.select_set(False)
+            element = tool.Ifc.get_entity(obj)
+            if element and element in elements:
+                obj.select_set(True)
+        return {"FINISHED"}

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

@@ -91,11 +91,17 @@ class BIM_UL_layers(UIList):
             row.operator("bim.disable_editing_layer", text="", icon="FREEZE", emboss=False)
 
             if context.scene.BIMLayerProperties.active_layer_id == item.ifc_definition_id:
+                op = row.operator("bim.select_layer_products", text="", icon="RESTRICT_SELECT_OFF")
+                op.layer = item.ifc_definition_id
                 row.operator("bim.edit_presentation_layer", text="", icon="CHECKMARK")
                 row.operator("bim.disable_editing_layer", text="", icon="CANCEL")
             elif context.scene.BIMLayerProperties.active_layer_id:
+                op = row.operator("bim.select_layer_products", text="", icon="RESTRICT_SELECT_OFF")
+                op.layer = item.ifc_definition_id
                 row.operator("bim.remove_presentation_layer", text="", icon="X").layer = item.ifc_definition_id
             else:
+                op = row.operator("bim.select_layer_products", text="", icon="RESTRICT_SELECT_OFF")
+                op.layer = item.ifc_definition_id
                 op = row.operator("bim.enable_editing_layer", text="", icon="GREASEPENCIL")
                 op.layer = item.ifc_definition_id
                 row.operator("bim.remove_presentation_layer", text="", icon="X").layer = item.ifc_definition_id