fix memory leak in cocktail detail view lifecycle

Author: AndreWohnsland

src/ui/setup_mainwindow.py

@@ -135,7 +135,13 @@ def _deprecation_check(self):
     def open_cocktail_selection(self, cocktail: Cocktail):
         """Open the cocktail selection screen."""
         if self.cocktail_selection is not None:
+            # Clean up all internal layouts and widgets recursively
+            DP_CONTROLLER.delete_items_of_layout(self.cocktail_selection.layout())
+            # Remove from stacked widget
             self.container_maker.removeWidget(self.cocktail_selection)
+            # Schedule for deletion and remove reference
+            self.cocktail_selection.deleteLater()
+            self.cocktail_selection = None
         self.cocktail_selection = CocktailSelection(
             self, cocktail, lambda: self.container_maker.setCurrentWidget(self.cocktail_view)
         )
@@ -163,7 +169,9 @@ def open_keyboard(self, le_to_write, max_char_len=30):
 
     def open_progression_window(self, cocktail_type: str = "Cocktail"):
         """Open up the progression window to show the Cocktail status."""
-        self.progress_window = ProgressScreen(self, cocktail_type)
+        if self.progress_window is None:
+            self.progress_window = ProgressScreen(self, cocktail_type)
+        self.progress_window.show_screen(cocktail_type)
 
     def change_progression_window(self, pb_value: int):
         """Change the value of the progression bar of the ProBarWindow."""
@@ -175,7 +183,7 @@ def close_progression_window(self):
         """Close the progression window at the end of the cycle."""
         if self.progress_window is None:
             return
-        self.progress_window.close()
+        self.progress_window.hide()
 
     def open_team_window(self):
         self.team_window = TeamScreen(self)

src/ui/setup_progress_screen.py

@@ -16,6 +16,10 @@ def __init__(self, parent, cocktail_type="Cocktail"):
         DP_CONTROLLER.initialize_window_object(self)
         self.PBabbrechen.clicked.connect(interrupt_cocktail)
         self.mainscreen = parent
+        self.show_screen(cocktail_type)
+
+    def show_screen(self, cocktail_type="Cocktail"):
+        """Show the Progress screen."""
         UI_LANGUAGE.adjust_progress_screen(self, cocktail_type)
         self.showFullScreen()
         DP_CONTROLLER.set_display_settings(self)