Systems UI - display icons for each system type in the dropdown

Example - https://files.catbox.moe/rnyuro.png

src/bonsai/bonsai/bim/module/system/data.py

@@ -57,9 +57,9 @@ class SystemData:
 
         # We're only interested in systems for services. Not sure why IFC groups these together.
         return [
-            (c, c, get_entity_doc(version, c).get("description", ""))
-            for c in sorted([d.name() for d in declarations])
-            if c not in ("IfcStructuralAnalysisModel")
+            (c, c, get_entity_doc(version, c).get("description", ""), tool.System.SYSTEM_ICONS[c], i)
+            for i, c in enumerate(sorted([d.name() for d in declarations]))
+            if c != "IfcStructuralAnalysisModel"
         ]
 
     @classmethod

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

@@ -36,16 +36,6 @@ FLOW_DIRECTION_TO_ICON = {
     "NOTDEFINED": "CHECKBOX_DEHLT",
 }
 
-SYSTEM_ICONS = {
-    "IfcSystem": "EXTERNAL_DRIVE",
-    "IfcDistributionSystem": "NETWORK_DRIVE",
-    "IfcDistributionCircuit": "DRIVER",
-    "IfcBuildingSystem": "MOD_BUILD",
-    "IfcBuiltSystem": "MOD_BUILD",
-    "IfcZone": "CUBE",
-}
-SYSTEM_ICONS["IfcElectricalCircuit"] = SYSTEM_ICONS["IfcDistributionCircuit"]
-
 
 class BIM_PT_systems(Panel):
     bl_label = "Systems"
@@ -446,7 +436,7 @@ class BIM_UL_systems(UIList):
                 op.option = "COLLAPSE" if item.is_expanded else "EXPAND"
             if data.edited_system_id == system_id:
                 row.label(text="", icon="GREASEPENCIL")
-            row.prop(item, "name", text="", icon=SYSTEM_ICONS[item.ifc_class], emboss=False)
+            row.prop(item, "name", text="", icon=tool.System.SYSTEM_ICONS[item.ifc_class], emboss=False)
 
 
 class BIM_UL_zones(UIList):

src/bonsai/bonsai/tool/system.py

@@ -48,6 +48,16 @@ class System(bonsai.core.tool.System):
     def get_zone_props(cls) -> BIMZoneProperties:
         return bpy.context.scene.BIMZoneProperties
 
+    SYSTEM_ICONS = {
+        "IfcSystem": "EXTERNAL_DRIVE",
+        "IfcDistributionSystem": "NETWORK_DRIVE",
+        "IfcDistributionCircuit": "DRIVER",
+        "IfcBuildingSystem": "MOD_BUILD",
+        "IfcBuiltSystem": "MOD_BUILD",
+        "IfcZone": "CUBE",
+    }
+    SYSTEM_ICONS["IfcElectricalCircuit"] = SYSTEM_ICONS["IfcDistributionCircuit"]
+
     @classmethod
     def add_ports(
         cls,
@@ -430,10 +440,8 @@ class System(bonsai.core.tool.System):
 
     @classmethod
     def draw_system_ui(cls, layout: bpy.types.UILayout, system_id: int, system_name: str, system_class: str) -> None:
-        from bonsai.bim.module.system.ui import SYSTEM_ICONS
-
         row = layout.row(align=True)
-        row.label(text=system_name, icon=SYSTEM_ICONS[system_class])
+        row.label(text=system_name, icon=cls.SYSTEM_ICONS[system_class])
         op = row.operator("bim.select_system_products", text="", icon="RESTRICT_SELECT_OFF")
         op.system = system_id
         op = row.operator("bim.unassign_system", text="", icon="X")