I played a bit around in /usr/share/lipstick-jolla-home-qt5/notifications/NotificationPreview.qml and figured out that
if(contentX < 0)
checks if the notification was swiped to the left.
Now I am looking for a way to block notifications for a few seconds. Anyone got an idea how to do that?
the ultimate plan is: if a notification is swiped to the left, a short “notifications are blocked for x secs” is shown and further notifications are postponed until after that.