this->setMouseTracking(true);

void MainWindow::mouseMoveEvent(QMouseEvent *event)
    {
        if (event->type() == QEvent::MouseMove)
        {
            QTimer *mousetimer = new QTimer(this);
            connect(mousetimer, SIGNAL(timeout()), this, SLOT(on_logoutPushButton_clicked()));
            mousetimer->start(5000);
        }
    }

void MainWindow::on_logoutPushButton_clicked()
{

    this->close();
    newauth = new AuthDialog;
    newauth->show();
}