PyQt5 Signals, Slots and Events - pyqtSignal, pyqtSlot, Mouse ...
Qt is programmed in C++, where the programming language is extended by the pre-processor MOC (meta-object compiler) with features such as the elementary signal and slot mechanism (enables event-controlled communication between program objects).
Qt5 C++ Signal And Slots Introduction - Codeloop
Connecting a QML signal to a regular C++ slot is easy ...
C++11 Signals and Slots! | Simon Schneegans’ Blog
I’ve been asked multiple times how I would implement a signal / slot mechanism in modern C++. Here is the answer!