This enables you to assign keys to go to the next file in the directory. The defaults are taken from Zoom Player: Shift+Page up and shift + Page down. It was requested here: https://sourceforge.net/tracker/index.php?func=detail&aid=1956579&group_id=185512&atid=913576
I tested it with windows xp and QT 4.3.5, it seems to work fine.
I am not sure however that the abnormal cases should be handled. It currently prints a message to the user if it fails to do it... should that be in qDebug?
It does not change the play list at all currently, do you think it should kick everything out of there? Zoom player does that...