Units formatting for Spatial Manager

Noticed in Sigma Dimensions video that we have some floating point garbage displayed in the Spatial Manager UI and I've added some simple formatting.

Now - https://i.imgur.com/eM1rDDu.png
Before - https://i.imgur.com/ySln5uU.png

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

@@ -44,10 +44,9 @@ def update_elevation(self, context):
 
 
 def update_active_container_index(self, context):
-    si_conversion = ifcopenshell.util.unit.calculate_unit_scale(tool.Ifc.get())
     self.active_container_id = self.containers[self.active_container_index].ifc_definition_id
     self.container_name = self.containers[self.active_container_index].name
-    self.elevation = self.containers[self.active_container_index].elevation * si_conversion
+    self.elevation = self.containers[self.active_container_index].elevation
 
 
 def updateContainerName(self, context):
@@ -78,7 +77,7 @@ class BIMObjectSpatialProperties(PropertyGroup):
 
 class BIMContainer(PropertyGroup):
     name: StringProperty(name="Name", update=updateContainerName)
-    elevation: FloatProperty(name="Elevation")
+    elevation: FloatProperty(name="Elevation", subtype="DISTANCE")
     level_index: IntProperty(name="Level Index")
     has_children: BoolProperty(name="Has Children")
     is_expanded: BoolProperty(name="Is Expanded")

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

@@ -147,7 +147,7 @@ class BIM_UL_containers_manager(UIList):
             split1 = row.split(factor=0.7)
             split1.prop(item, "name", emboss=False, text="")
             split2 = row.split(factor=1)
-            split2.label(text=str(item.elevation), icon="BLANK1")
+            split2.label(icon="BLANK1", text=tool.Unit.blender_format_unit(item.elevation))
 
     def draw_hierarchy(self, row, item):
         for i in range(0, item.level_index):

src/blenderbim/blenderbim/tool/spatial.py

@@ -212,12 +212,13 @@ class Spatial(blenderbim.core.tool.Spatial):
 
     @classmethod
     def create_new_storey_li(cls, element, level_index):
+        si_conversion = ifcopenshell.util.unit.calculate_unit_scale(tool.Ifc.get())
         new = cls.props.containers.add()
         new.name = element.Name or "Unnamed"
         new.long_name = element.LongName or ""
         new.has_decomposition = bool(element.IsDecomposedBy)
         new.ifc_definition_id = element.id()
-        new.elevation = ifcopenshell.util.placement.get_storey_elevation(element)
+        new.elevation = ifcopenshell.util.placement.get_storey_elevation(element) * si_conversion
 
         new.is_expanded = element.id() not in cls.contracted_containers
         new.level_index = level_index

src/blenderbim/blenderbim/tool/unit.py

@@ -163,3 +163,13 @@ class Unit(blenderbim.core.tool.Unit):
         unit = cls.get_project_currency_unit()
         if unit:
             return unit.Currency
+
+    @classmethod
+    def blender_format_unit(cls, value):
+        return bpy.utils.units.to_string(
+            bpy.context.scene.unit_settings.system,
+            "LENGTH",
+            value,
+            precision=4,
+            split_unit=bpy.context.scene.unit_settings.system == "IMPERIAL",
+        )