Show length, area, volume units by default in unit panel for convenience

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

@@ -35,6 +35,9 @@ class UnitsData:
     @classmethod
     def load(cls):
         cls.data = {
+            "length_unit": cls.length_unit(),
+            "area_unit": cls.area_unit(),
+            "volume_unit": cls.volume_unit(),
             "unit_classes": cls.unit_classes(),
             "named_unit_types": cls.named_unit_types(),
             "conversion_unit_types": cls.conversion_unit_types(),
@@ -42,6 +45,21 @@ class UnitsData:
         }
         cls.is_loaded = True
 
+    @classmethod
+    def length_unit(cls):
+        if unit := ifcopenshell.util.unit.get_project_unit(tool.Ifc.get(), "LENGTHUNIT"):
+            return ifcopenshell.util.unit.get_full_unit_name(unit)
+
+    @classmethod
+    def area_unit(cls):
+        if unit := ifcopenshell.util.unit.get_project_unit(tool.Ifc.get(), "AREAUNIT"):
+            return ifcopenshell.util.unit.get_full_unit_name(unit)
+
+    @classmethod
+    def volume_unit(cls):
+        if unit := ifcopenshell.util.unit.get_project_unit(tool.Ifc.get(), "VOLUMEUNIT"):
+            return ifcopenshell.util.unit.get_full_unit_name(unit)
+
     @classmethod
     def unit_classes(cls):
         declarations = ifcopenshell.util.schema.get_subtypes(tool.Ifc.schema().declaration_by_name("IfcNamedUnit"))

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

@@ -51,6 +51,17 @@ class BIM_PT_units(Panel):
             row.operator("bim.load_units", text="", icon="GREASEPENCIL")
 
         if not self.props.is_editing:
+            row = self.layout.row(align=True)
+            row.label(text="Length Unit", icon="ARROW_LEFTRIGHT")
+            row.label(text=str(UnitsData.data["length_unit"]))
+
+            row = self.layout.row(align=True)
+            row.label(text="Area Unit", icon="ORIENTATION_VIEW")
+            row.label(text=str(UnitsData.data["area_unit"]))
+
+            row = self.layout.row(align=True)
+            row.label(text="Volume Unit", icon="EMPTY_ARROWS")
+            row.label(text=str(UnitsData.data["volume_unit"]))
             return
 
         row = self.layout.row(align=True)