Problem about signalsslots in Qt 5

QSignal Class qt connect signal to slot with parameter Like for waitSignal , each callable has to return True if parameters match, False otherwise Instead of a specific callable, None can be provided, to disable qt signal slot Connections are made between signals and slots by the programmer using some Qt macro foo The behavior associated with a received signal is

qt signal slot example Qt's signals and slots mechanism ensures that if you connect a signal to a slot, the slot will be called with the signal's parameters at the right time