Checkpoint before ghost pallet cleanup workflow

reset_corsie.py

@@ -10,7 +10,7 @@ from tkinter import messagebox, simpledialog, ttk
 
 import customtkinter as ctk
 
-from gestione_aree_frame_async import AsyncRunner, BusyOverlay
+from gestione_aree import AsyncRunner, BusyOverlay
 
 SQL_CORSIE = """
     WITH C AS (
@@ -94,7 +94,7 @@ WHERE c.ID <> 9999 AND LTRIM(RTRIM(c.Corsia)) = :corsia;
 class ResetCorsieWindow(ctk.CTkToplevel):
     """Toplevel used to inspect and clear the pallets assigned to an aisle."""
 
-    def __init__(self, parent, db_client):
+    def __init__(self, parent, db_client, session=None):
         """Create the window and immediately load the list of aisles."""
         super().__init__(parent)
         self.title("Reset Corsie - svuotamento celle per corsia")
@@ -103,6 +103,7 @@ class ResetCorsieWindow(ctk.CTkToplevel):
         self.resizable(True, True)
 
         self.db = db_client
+        self.session = session
         self._busy = BusyOverlay(self)
         self._async = AsyncRunner(self)
 
@@ -256,9 +257,22 @@ class ResetCorsieWindow(ctk.CTkToplevel):
         self._async.run(self.db.query_json(SQL_DELETE, {"corsia": corsia}), _ok_del, _err_del, busy=self._busy, message=f"Svuoto {corsia}...")
 
 
-def open_reset_corsie_window(parent, db_app):
+def open_reset_corsie_window(parent, db_app, session=None):
     """Create, focus and return the aisle reset window."""
-    win = ResetCorsieWindow(parent, db_app)
-    win.lift()
-    win.focus_set()
+    key = "_reset_corsie_window_singleton"
+    ex = getattr(parent, key, None)
+    if ex and ex.winfo_exists():
+        try:
+            ex.lift()
+            ex.focus_force()
+            return ex
+        except Exception:
+            pass
+    win = ResetCorsieWindow(parent, db_app, session=session)
+    setattr(parent, key, win)
+    try:
+        win.lift()
+        win.focus_force()
+    except Exception:
+        pass
     return win