Definition of signal slope
In this example, the SIGNAL() and SLOT() macros are used to specify the signal (dataReady) and slot (onDataReady) to connect.
Qt Signals and Slots : r/cpp
"clicked()" is your slot! You have to define it and use SLOT instead of SIGNAL.
Signals and slots - Wikipedia
I mean you can connect many slots to a signal, and if a slot is deleted the signal will know. Basically just saying those things are important to any library you want to use, and make implementation of a GOOD signal/slot mechanism non-trivial.
Kiến trúc UNIX/LINUX
Step 4 – Signals and Slots. The class declaration looks like this when the slot and signal have been added. class ValueObject : public QObject. {. Q_OBJECT.