Signals and slots

All classes that inherit from QObject or one of its subclasses, like QWidget can contain signals and slots Signals are emitted by objects when they change

When a signal is emitted, the slots connected to it are usually executed immediately, just like a normal function call When this happens, the signals and slots

signal and slot arguments are not compatible The processing function then calls the callback when appropriate In Qt, there is an alternative to the callback technique: signals and slots A signal is

signal and slot Or is it that just another name because QT has it in every QObject ? (Sorry, I stopped reading your Link at The Meta Object Compiler where too