title: Qt - emitting slots instead of signals
body: <p>Suppose I have a QPushButton widget that is connected to a slot by its clicked() signal. This first slot in turn calls another slot by the emit keyword. The second slot takes an argument from the first slot and do something with it. It worked, but from what I understand of the signals-slots pattern, it only makes sense to emit a signal. Is it wrong to emit a slot instead of a signal?</p>