Second attempt at fixing saving settings on shutdown.

src/headlessloader.h

@@ -41,6 +41,7 @@ class HeadlessLoader: public QObject {
 
 public:
   HeadlessLoader(const QStringList &torrentCmdLine) {
+    connect(static_cast<SessionApplication*>(qApp), SIGNAL(aboutToQuit()), this, SLOT(deleteBTSession()), Qt::DirectConnection);
     Preferences pref;
     // Enable Web UI
     pref.setWebUiEnabled(true);
@@ -61,11 +62,11 @@ public:
     }
   }
 
-  ~HeadlessLoader() {
+public slots:
+  void deleteBTSession() {
     QBtSession::drop();
   }
 
-public slots:
   // Call this function to exit qBittorrent headless loader
   // and return to prompt (object will be deleted by main)
   void exit() {

src/mainwindow.cpp

@@ -110,7 +110,7 @@ MainWindow::MainWindow(QWidget *parent, const QStringList& torrentCmdLine) : QMa
   setWindowTitle(QString("qBittorrent %1").arg(QString::fromUtf8(VERSION)));
   displaySpeedInTitle = pref.speedInTitleBar();
   // Clean exit on log out
-  connect(static_cast<SessionApplication*>(qApp), SIGNAL(sessionIsShuttingDown()), this, SLOT(deleteBTSession()), Qt::DirectConnection);
+  connect(static_cast<SessionApplication*>(qApp), SIGNAL(aboutToQuit()), this, SLOT(deleteBTSession()), Qt::DirectConnection);
   // Setting icons
 #if defined(Q_WS_X11)
   if (Preferences().useSystemIconTheme())
@@ -397,10 +397,6 @@ MainWindow::~MainWindow() {
   delete switchTransferShortcut;
   delete switchRSSShortcut;
   IconProvider::drop();
-  // Delete QBtSession::instance() object
-  m_pwr->setActivityState(false);
-  qDebug("Deleting QBtSession::instance()");
-  QBtSession::drop();
   qDebug("Exiting GUI destructor...");
 }
 

src/sessionapplication.cpp

@@ -39,12 +39,6 @@ QtSingleApplication(id, argc, argv)
 #endif
 {}
 
-void SessionApplication::commitData(QSessionManager & manager) {
-  Q_UNUSED(manager);
-  emit sessionIsShuttingDown();
-  manager.release();
-}
-
 bool SessionApplication::notify(QObject* receiver, QEvent* event) {
   try {
     return QApplication::notify(receiver, event);

src/sessionapplication.h

@@ -52,13 +52,9 @@ class SessionApplication :
 
 public:
   SessionApplication(const QString &id, int &argc, char **argv);
-  void commitData(QSessionManager & manager);
 
 protected:
     virtual bool notify(QObject* receiver, QEvent* event);
-
-  signals:
-    void sessionIsShuttingDown();
 };
 
 #endif // SESSIONAPPLICATION_H