Performance comparison of the Qt Signals and Slots mechanism

What do I do if a slot is not invoked? signal and slot arguments are not compatible QObject::connect: No such slot as RxMock::rxsignal() If I remove Q_OBJECT in class MockRx, I get: No such slot as QWidget::rxsignal() I also tried to signal and slot The signal and slot specifications should have the argument types, but not the arguments themselves Get Application Development with Qt Creator

signal and slot arguments are not compatible Ensure that the signature of the signal and slot match to avoid runtime errors Prefer using the new-style syntax for signal-slot connections (