a quetion about signals and slots

[krystosan]

I started with signals and slots follwing the exercise at zetcode

button.clicked.connect(self.onClicked)

button = QGui.QPushButton()

if button is the object created

then what is clicked and connect

from what i understand if clicked is an event that occurred, so is it method defined inside QPushButton ?

what is connect then ?

[amleto]

clicked will represent the signal. connect is a method to join a signal to a slot

[anda_skoa]

from what i understand if clicked is an event that occurred, so is it method defined inside QPushButton ?


As amleto already said, "clicked" is what Qt calls a signal. Your guess was already very good, you can think of it as a high level event that the button sends whenever it is clicked and your assumption that it is implemented in the button class is also correct (not in QPushButton though, but in QPushButton's base class QAbstractButton).



what is connect then ?

Again as amleto said, it is a method to tell Qt which function you would like to get executed when the "clicked" signal/event happens.

Cheers,
_

[krystosan]

so can i think of clicked method sort of pure virtual function of C++:confused:

[wysota]

so can i think of clicked method sort of pure virtual function of C++:confused:

No, it's neither pure nor virtual. It's just a method declared in a class and implemented by a special tool called Meta-Object Compiler that is executed when Qt is built.