Qt question: How do signals and slots work?

Hello, My company wants to decrease our dependency with Qt to the GUI part only so I am looking for a signalslot alternative

In this video we are going to learn how to use QT designer to execute functions for us without

signal and slot in qt QT library · Qt::DirectConnection

signal and slot When the signal is emitted with fewer arguments than the slot, Qt runs the slot using default parameter values Functor-based connections do not support