Calling Qt Functions From Unix Signal Handlers

You can't pass parameters to signal when you connect Parameters are passed to the signal when the signal is emitted Same applies to slots:

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 Signals

qtech slot malaysia Qt magic is simply the ability to emit a signal function to any connected slot function without knowing the details of the class implementing this slot

qtech slot The connect method has a non python-friendly syntax It is necessary to inform the object, its signal and a slot to be connected to