Stabilizza barcode e UDC non scaffalate

gestione_aree.py

@@ -19,6 +19,7 @@ from typing import Any, Callable, Optional
 import customtkinter as ctk
 
 from async_loop_singleton import get_global_loop
+from runtime_support import log_exception
 from version_info import module_version
 
 __version__ = module_version(__name__)
@@ -128,21 +129,53 @@ class AsyncRunner:
             busy.show(message)
         fut = asyncio.run_coroutine_threadsafe(awaitable, self.loop)
 
+        def _widget_alive() -> bool:
+            try:
+                return bool(self.widget.winfo_exists())
+            except tk.TclError:
+                return False
+
+        def _dispatch_success(res: Any) -> None:
+            try:
+                on_success(res)
+            except BaseException as ex:
+                log_exception(__name__, ex, context="AsyncRunner on_success")
+
+        def _dispatch_error(ex: BaseException) -> None:
+            if on_error:
+                try:
+                    on_error(ex)
+                except BaseException as callback_ex:
+                    log_exception(__name__, callback_ex, context="AsyncRunner on_error")
+            else:
+                log_exception(__name__, ex, context="AsyncRunner unhandled error")
+
         def _poll():
+            if not _widget_alive():
+                return
             if fut.done():
                 if busy:
-                    busy.hide()
+                    try:
+                        busy.hide()
+                    except Exception as ex:
+                        log_exception(__name__, ex, context="AsyncRunner hide busy")
                 try:
                     res = fut.result()
                 except BaseException as ex:
-                    if on_error:
-                        self.widget.after(0, lambda e=ex: on_error(e))
-                    else:
-                        print("[AsyncRunner] Unhandled error:", repr(ex))
+                    try:
+                        self.widget.after(0, lambda e=ex: _dispatch_error(e))
+                    except tk.TclError:
+                        log_exception(__name__, ex, context="AsyncRunner error after destroyed")
                 else:
-                    self.widget.after(0, lambda r=res: on_success(r))
+                    try:
+                        self.widget.after(0, lambda r=res: _dispatch_success(r))
+                    except tk.TclError as ex:
+                        log_exception(__name__, ex, context="AsyncRunner success after destroyed")
             else:
-                self.widget.after(60, _poll)
+                try:
+                    self.widget.after(60, _poll)
+                except tk.TclError:
+                    return
 
         _poll()