How to use signals and slots in Slicer 3d?

SIGNALSLOT + Arguments - QObject::connect qt connect signal to slot with parameter The button uses the clicked() signal and the label uses the slot setText() clicked() does not give any arguments to the slot setText() To qt signal and slot A queued signal-slot connection is nothing else but an asynchronous function call Conceptually, the routing function QMetaObject::activate

qt connect signal slot Have a look at the declaration of the static connect function: C++ connect(const QObject *sender, const char *signal, const QObject