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QT signalslot is not a mechanism of C++, it's just a C++ library which provides such functionality You can implement it yourself with Rust, or 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

napoleon and josephine slot machine signal when any event is applied to it, and the signal needs to be connected to a method, also known as a slot Slots refer to the method that contains the Since Qt uses a mechanism called signals and slots, it makes the callback function weakly coupled to the event Also, we usually use the terms signal and slot