fix(component editor): fixed the Tkinter callback exception that was occurring when the component editor window was closed before a delayed usage instructions popup could be displayed.

Author: amilcarlucas

ardupilot_methodic_configurator/frontend_tkinter_component_editor_base.py

@@ -294,6 +294,10 @@ def _check_show_usage_instructions(self) -> None:
 
     def _display_component_editor_usage_instructions(self, parent: tk.Tk) -> None:
         """Display usage instructions for the component editor."""
+        # Check if parent window still exists before showing popup
+        if not parent.winfo_exists():
+            return
+
         # pylint: disable=duplicate-code
         usage_popup_window = BaseWindow(parent)
         style = ttk.Style()

tests/test_frontend_tkinter_component_editor_base.py

@@ -1742,6 +1742,7 @@ def test_user_sees_helpful_usage_instructions_on_first_use(  # pylint: disable=t
 
         # Create a mock Tk parent for testing
         mock_parent = MagicMock()
+        mock_parent.winfo_exists.return_value = True
 
         # Act: Display usage instructions
         editor_for_usage_tests._display_component_editor_usage_instructions(mock_parent)