I'm working on a project and trying to pass the checked state of a checkable button to a function via button.clicked.connect(self.button_checked) and ran across an issue. If I use the "decoration" @QtCore.pyqtSlot() before my callable then the checked state will not pass. But if I remove the decoration the function works as expected and written in documentation. See code below for the two cases:
With decoration
...
btn = QPushButton("Push")
btn.setCheckable(True)
btn.toggled.connect(self.button_checked)
...
@QtCore.pyqtSlot()
def button_checked(self, checked):
print("checked", checked)
...
I get the error TypeError: button_checked() missing 1 required positional argument: 'checked' when the button is pushed. But when I remove QtCore.pyqtSlot() and just have:
...
btn = QPushButton("Push")
btn.setCheckable(True)
btn.toggled.connect(self.button_checked)
...
def button_checked(self, checked):
print("checked", checked)
...
The button works as expected and prints checked True or checked False depending on the checked state.
My question is what is the @QtCore.pyqtSlot() for? I am still new to QtPy and don't have a great grasp on this lines purpose. Do I need to explicity assign a slot in this case? I've found that it can be necessary in some specific situations (function of pyqtSlot) and is considered good practice but it seems to have an effect I don't want in this case. Any advice/knowledge you can pass along is appreciated. Thanks.
