Qt Designer's Signals and Slots Editing Mode

slot needs to perform the intended result of the signal This is a powerful way to extend or modify the built-in signals provided by Qt

signal You can think of the signal declaration as an output of the class When mValue changes, the slot, which CHAPTER 4: Beginning Qt Development 67

qt connect signal to slot with parameter signal and slots mechanism needs some kind of metadata about your class to resolve your signals and slots This could have been done partly with the C++

qt slot How Qt Signals and Slots Work Understanding Signals and Slot in Qt Signals and slots C++