exit_Crash_fix

functions/verfahrensgebiet_manager.py

@@ -171,3 +171,46 @@ def setup_verfahrensgebiet_listener() -> None:
         
     except Exception:
         pass
+
+
+def teardown_verfahrensgebiet_listener() -> None:
+    """
+    Trennt globale Event-Listener vom QgsProject-Singleton.
+
+    Diese Funktion ist idempotent und kann mehrfach aufgerufen werden.
+    """
+    global _listener_installed
+
+    if not _listener_installed:
+        return
+
+    try:
+        project = QgsProject.instance()
+        if project is None:
+            return
+
+        try:
+            project.layersAdded.disconnect(_on_layers_added)
+        except Exception:
+            pass
+
+        try:
+            project.layerRemoved.disconnect(_on_layer_removed)
+        except Exception:
+            pass
+
+        for signal_name in ("readProject", "newProjectCreated", "cleared"):
+            signal = getattr(project, signal_name, None)
+            if signal is None:
+                continue
+            try:
+                signal.disconnect(_on_project_changed)
+            except Exception:
+                pass
+
+    except RuntimeError:
+        pass
+    except Exception:
+        pass
+    finally:
+        _listener_installed = False

main.py

@@ -4,7 +4,10 @@ from qgis.utils import plugins
 
 from sn_basis.functions.qt_wrapper import QCoreApplication
 from sn_basis.functions.sys_wrapper import getattr_safe
-from sn_basis.functions.verfahrensgebiet_manager import setup_verfahrensgebiet_listener
+from sn_basis.functions.verfahrensgebiet_manager import (
+    setup_verfahrensgebiet_listener,
+    teardown_verfahrensgebiet_listener,
+)
 from sn_basis.ui.navigation import Navigation
 
 
@@ -53,6 +56,8 @@ class BasisPlugin:
         """
         Räumt UI-Komponenten sauber auf.
         """
+        teardown_verfahrensgebiet_listener()
+
         if self.ui:
             self.ui.remove_all()
             self.ui = None

ui/base_dockwidget.py

@@ -99,6 +99,20 @@ class BaseDockWidget(QDockWidget):
         Wird aufgerufen, wenn das Dock geschlossen wird.
         Setzt die zugehörige Toolbar-Action zurück.
         """
+        try:
+            tab_widget = self.widget()
+            if tab_widget and hasattr(tab_widget, "count") and hasattr(tab_widget, "widget"):
+                for index in range(tab_widget.count()):
+                    tab = tab_widget.widget(index)
+                    cleanup = getattr(tab, "cleanup", None)
+                    if callable(cleanup):
+                        try:
+                            cleanup()
+                        except Exception:
+                            pass
+        except Exception:
+            pass
+
         try:
             if self.action:
                 self.action.setChecked(False)

ui/tabs/print_tab.py

@@ -13,7 +13,10 @@ from sn_basis.functions.qt_wrapper import (
     QCheckBox,
     QHBoxLayout,
     QPushButton,
-    QCoreApplication,
+    QToolButton,
+    ToolButtonTextBesideIcon,
+    ArrowDown,
+    ArrowRight,
 )
 from sn_basis.functions.qgiscore_wrapper import QgsProject, QgsMapLayerProxyModel
 from sn_basis.functions.qgisui_wrapper import iface, QgsMapLayerComboBox
@@ -88,13 +91,6 @@ class PrintTab(QWidget):
         self._connect_theme_collection_signals()
         self._connect_project_signals()
 
-        app = QCoreApplication.instance()
-        if app is not None:
-            try:
-                app.aboutToQuit.connect(self._cleanup_signals)
-            except Exception:
-                pass
-
     def set_services(self, pruefmanager: Pruefmanager, data_grabber: DataGrabber) -> None:
         _ = data_grabber
         self.pruefmanager = pruefmanager
@@ -442,26 +438,38 @@ class PrintTab(QWidget):
             druckbereich_auswahl=self._druckbereich_combo.currentText() if self._druckbereich_combo else DRUCKBEREICH_VERFAHRENSGEBIET,
         )
 
-    def _cleanup_signals(self) -> None:
-        """Trennt alle QGIS-Signalverbindungen vor dem Beenden von QGIS."""
-        self._disconnect_theme_collection_signals()
+    def _disconnect_project_signals(self) -> None:
         try:
             project = QgsProject.instance()
-            if project is None:
-                return
-            for signal_name in ("readProject", "newProjectCreated", "cleared"):
-                signal = getattr(project, signal_name, None)
-                if signal is None:
-                    continue
-                try:
-                    signal.disconnect(self._on_project_changed)
-                except Exception:
-                    pass
         except Exception:
-            pass
+            return
+
+        if project is None:
+            return
+
+        for signal_name in ("readProject", "newProjectCreated", "cleared"):
+            signal = getattr(project, signal_name, None)
+            if signal is None:
+                continue
+            try:
+                signal.disconnect(self._on_project_changed)
+            except Exception:
+                pass
+
+    def cleanup(self) -> None:
+        """Trennt Signalverbindungen vor dem Schliessen des Tabs."""
+        self._disconnect_theme_collection_signals()
+        self._disconnect_project_signals()
 
     def _connect_project_signals(self) -> None:
-        project = QgsProject.instance()
+        try:
+            project = QgsProject.instance()
+        except Exception:
+            return
+
+        if project is None:
+            return
+
         for signal_name in ("readProject", "newProjectCreated", "cleared"):
             signal = getattr(project, signal_name, None)
             if signal is None: