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Signals are connected to slots using the connect() method of a bound signal connect (slot

2 Answers 2 You would need to use a more recent version of QGIS to use the checkedItemsChanged signal The signal not being emitted was indeed Qt introduit le principe de la communication à partir de signaux et de slots Les slots sont des méthodes qui pourront être connectées à un signal de manière

11 winner .com app download 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 Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal Qt's signals and slots mechanism