Add slideshow

mainwindow.cpp

@@ -181,6 +181,8 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
         else m_ringList->stopLoading();
     }, Qt::Key_F2);
     thumbnailsAction->setCheckable(true);
+    QAction *slideshowAction = viewMenu->addAction(tr("Slideshow"), m_ringList, &ImageRingList::toggleSlideshow, Qt::Key_F3);
+    slideshowAction->setCheckable(true);
     menuBar()->addMenu(viewMenu);
 
     QMenu *selectMenu = new QMenu(tr("Select"), this);