AddFile: Add deleted flags.

src/Model/Tools/PamhyrDB.py

@@ -162,6 +162,17 @@ class SQLSubModel(PamhyrID):
         super(SQLSubModel, self).__init__(id)
 
         self._status = status
+
+        # Deletion status of the model object. This status MUST be set
+        # to True if an object that exists in a parent scenario is
+        # deleted in current scenario.
+        self._deleted = False
+
+        # The 'owner_scenario' is the id of the scenario to which the
+        # object belongs. This id CAN be different to current
+        # scenario, but in case of object modification, this id MUST
+        # be set to current scenario id. (This action is made in
+        # 'modified' method.)
         self._owner_scenario = 0
         if owner_scenario == -1:
             if status is not None:
@@ -170,12 +181,49 @@ class SQLSubModel(PamhyrID):
             self._owner_scenario = owner_scenario
 
     def must_be_saved(self):
+        """Return True if this object MUST be save in the save file.
+
+        Returns:
+            True if this object MUST be save, otherelse False
+        """
         return self._owner_scenario == self._status.scenario_id
 
     def modified(self):
+        """Set study status to modified and update the object
+        owner_scenario to current scenario
+
+        Returns:
+            Nothing
+        """
         self._owner_scenario = self._status.scenario_id
         self._status.modified()
 
+    def is_deleted(self):
+        """This object is deleted?
+
+        Returns:
+            True if this object is deleted, otherelse False
+        """
+        return self._deleted
+
+    def set_as_deleted(self):
+        """Set object deleted flag to True.
+
+        Returns:
+            Nothing
+        """
+        self._deleted = True
+        self.modified()
+
+    def set_as_not_deleted(self):
+        """Set object deleted flag to False.
+
+        Returns:
+            Nothing
+        """
+        self._deleted = False
+        self.modified()
+
     def _db_format(self, value):
         # Replace ''' by ''' to preserve SQL injection
         if type(value) is str: