Qt5 Tutorial Signals and Slots - 2020

It hides an automatic implementation of callbacks registration Adding signalslot handling Your class must inherit from QObject

In Qt, we have an alternative to the callback technique: We use signals and slots A signal is emitted when a particular event occurs Qt's

signal slot The library defines several user-event signals on various widgets, and it is easy and convenient to add signals and slots to widget classes to communicate

signal and slot in qt In signal-slot mechanism, very similar to observer pattern, you connect a signal to a slot, and when that signal is emitted, all slots are