Polish Brick UI and add "last saved" label

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

@@ -42,9 +42,17 @@ class BIM_PT_brickschema(Panel):
             row.operator("bim.load_brick_project", text="Load Project")
             return
 
+        row = self.layout.row(align=True)
         if BrickStore.path:
-            row = self.layout.row(align=True)
             row.label(text=BrickStore.path, icon="FILEBROWSER")
+        else:
+            row.label(text="No file", icon="FILEBROWSER")
+        
+        row = self.layout.row(align=True)
+        if BrickStore.last_saved:
+            row.label(text=BrickStore.last_saved, icon="TIME")
+        else:
+            row.label(text="Not saved", icon="TIME")
 
         row = self.layout.row(align=True)
         op = row.operator("bim.serialize_brick", icon="EXPORT", text="Save")
@@ -86,43 +94,43 @@ class BIM_PT_brickschema(Panel):
         row.prop(data=self.props, property="new_brick_label", text="")
         prop_with_search(row, self.props, "brick_entity_class", text="")
         row.operator("bim.add_brick", text="", icon="ADD")
-        # row.operator("bim.refresh_brick_viewer", text="", icon="FILE_REFRESH")
 
         row = self.layout.row(align=True)
         col = row.column()
         col.alignment = "RIGHT"
         row.prop(data=self.props, property="set_list_root_toggled", text="", icon="OUTLINER")
         row.prop(data=self.props, property="split_screen_toggled", text="", icon="WINDOW")
+        row.operator("bim.refresh_brick_viewer", text="", icon="FILE_REFRESH")
 
         grid = self.layout.grid_flow(even_columns=True)
-        grid1 = grid.column(align=True)
+        grid_left = grid.column(align=True)
-        row = grid1.row(align=True)
+        row = grid_left.row(align=True)
         if len(self.props.brick_breadcrumbs):
             op = row.operator("bim.rewind_brick_class", text="", icon="FRAME_PREV")
             op.split_screen = False
         row.label(text=self.props.active_brick_class)
 
         if self.props.set_list_root_toggled:
-            row = grid1.row(align=True)
+            row = grid_left.row(align=True)
             row.prop(data=self.props, property="brick_list_root", text="")
 
-        row = grid1.row()
+        row = grid_left.row()
         BIM_UL_bricks.split_screen = False
         row.template_list("BIM_UL_bricks", "", self.props, "bricks", self.props, "active_brick_index")
 
         if self.props.split_screen_toggled:
-            grid2 = grid.column(align=True)
+            grid_right = grid.column(align=True)
-            row = grid2.row(align=True)
+            row = grid_right.row(align=True)
             if len(self.props.split_screen_brick_breadcrumbs):
                 op = row.operator("bim.rewind_brick_class", text="", icon="FRAME_PREV")
                 op.split_screen = True
             row.label(text=self.props.split_screen_active_brick_class)
 
             if self.props.set_list_root_toggled:
-                row = grid2.row(align=True)
+                row = grid_right.row(align=True)
                 row.prop(data=self.props, property="split_screen_brick_list_root", text="")
 
-            row = grid2.row()
+            row = grid_right.row()
             BIM_UL_bricks.split_screen = True
             row.template_list("BIM_UL_bricks", "", self.props, "split_screen_bricks", self.props, "split_screen_active_brick_index")
 
@@ -162,12 +170,10 @@ class BIM_PT_brickschema(Panel):
                 row.prop(data=self.props, property="new_brick_relation_object", text="")
                 row.operator("bim.add_brick_relation", text="", icon="ADD")
 
-
             if self.props.brick_create_relations_toggled and self.props.add_relation_failed:
                 row = self.layout.row(align=True)
                 row.label(text="Failed to find this entity!", icon="ERROR")
 
-
         for relation in BrickschemaData.data["active_relations"]:
             row = self.layout.row(align=True)
             row.label(text=relation["predicate_name"])

src/blenderbim/blenderbim/tool/brick.py

@@ -23,6 +23,7 @@ import ifcopenshell.util.brick
 import blenderbim.core.tool
 import blenderbim.tool as tool
 from contextlib import contextmanager
+import datetime
 
 try:
     import brickschema
@@ -308,6 +309,7 @@ class Brick(blenderbim.core.tool.Brick):
         with BrickStore.graph.new_changeset("PROJECT") as cs:
             cs.load_file(filepath)
         BrickStore.path = filepath
+        cls.set_last_saved()
         BrickStore.load_namespaces()
         BrickStore.load_entity_classes()
         BrickStore.load_relationships()
@@ -378,6 +380,7 @@ class Brick(blenderbim.core.tool.Brick):
     @classmethod
     def serialize_brick(cls):
         BrickStore.get_project().serialize(destination=BrickStore.path, format="turtle")
+        cls.set_last_saved()
 
     @classmethod
     def add_namespace(cls, alias, uri):
@@ -391,11 +394,18 @@ class Brick(blenderbim.core.tool.Brick):
         else:
             bpy.context.scene.BIMBrickProperties.brick_breadcrumbs.clear()
 
+    @classmethod
+    def set_last_saved(cls):
+        save = os.path.getmtime(BrickStore.path)
+        save = datetime.datetime.fromtimestamp(save)
+        BrickStore.last_saved = f"{save.year}-{save.month}-{save.day} {save.hour}:{save.minute}"
+
 class BrickStore:
     schema = None  # this is now a os path
     path = None  # file path if the project was loaded in
     graph = None  # this is the VersionedGraphCollection with 2 arbitrarily named graphs: "schema" and "project"
     # "SCHEMA" holds the Brick.ttl metadata; "PROJECT" holds all the authored entities
+    last_saved = None
     history = []
     future = []
     current_changesets = 0
@@ -415,6 +425,7 @@ class BrickStore:
         BrickStore.schema = None
         BrickStore.graph = None
         BrickStore.path = None
+        BrickStore.last_saved = None
         BrickStore.namespaces = []
         BrickStore.entity_classes = {}
         BrickStore.relationships = []