mainwindow::closeevent handles all the quit events

mainwindow.cpp

@@ -25,8 +25,9 @@ MainWindow::MainWindow(QWidget *parent) :
             this, SLOT(closeFile()));
     connect(m_ui->actionExport, SIGNAL(activated()),
             this, SLOT(exportScene()));
+
     connect(m_ui->actionQuit, SIGNAL(activated()),
-            this, SLOT(quit()));
+            QApplication::instance(), SLOT(quit()));
 
     connect(m_ui->actionAbout_QtMindMap, SIGNAL(activated()),
             this, SLOT(about()));
@@ -208,14 +209,6 @@ void MainWindow::exportScene()
      }
 }
 
-void MainWindow::quit()
-{
-    if (m_contentChanged && !closeFile())
-        return;
-
-    QApplication::instance()->quit();
-}
-
 void MainWindow::keys()
 {
     QMessageBox msgBox(this);

mainwindow.h

@@ -30,7 +30,6 @@ public slots:
     bool saveFileAs();
     bool closeFile();
     void exportScene();
-    void quit();
 
     void keys();
     void about();