Fix #2719. Indicator whether or not IFC is dirty to help users know when to save.

src/blenderbim/blenderbim/bim/ifc.py

@@ -321,6 +321,7 @@ class IfcStore:
 
     @staticmethod
     def execute_ifc_operator(operator, context, is_invoke=False):
+        bpy.context.scene.BIMProperties.is_dirty = True
         is_top_level_operator = not bool(IfcStore.current_transaction)
 
         if is_top_level_operator:

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

@@ -1105,6 +1105,7 @@ class ExportIFC(bpy.types.Operator):
         save_blend_file = bool(bpy.data.is_saved and bpy.data.is_dirty and bpy.data.filepath)
         if save_blend_file:
             bpy.ops.wm.save_mainfile(filepath=bpy.data.filepath)
+        bpy.context.scene.BIMProperties.is_dirty = False
         blenderbim.bim.handler.refresh_ui_data()
         self.report(
             {"INFO"},

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

@@ -206,7 +206,10 @@ class BIM_PT_project(Panel):
 
         if props.ifc_file:
             row = self.layout.row(align=True)
-            row.label(text="Saved", icon="EXPORT")
+            if context.scene.BIMProperties.is_dirty:
+                row.label(text="Saved*", icon="EXPORT")
+            else:
+                row.label(text="Saved", icon="EXPORT")
             row.label(text=ProjectData.data["last_saved"])
 
             row = self.layout.row(align=True)

src/blenderbim/blenderbim/bim/prop.py

@@ -351,6 +351,7 @@ class BIMTabProperties(PropertyGroup):
 
 
 class BIMProperties(PropertyGroup):
+    is_dirty: BoolProperty(name="Is Dirty", default=False)
     schema_dir: StringProperty(
         default=os.path.join(cwd, "schema") + os.path.sep, name="Schema Directory", update=update_schema_dir
     )