Hi,
I used to use the decorator which I believed was "correct" according to the
PyQt documents. Then I realised there were many instances where I'd
forgotten to use it, but everything still worked, so now I generally don't
bother. It may still be good practice and necessary in some cases:
https://stackoverflow.com/questions/14421897/is-the-pyside-slot-decorator-necessary/14431607#14431607
I think if you want to get it to work, you need to tell the decorator that
the wrapped function accepts a parameter. In this case I believe the evt is
an instance of QMouseEvent, so the decorator should be something like
(import of QtGui needed of course):
@pyqtSlot(QtGui.QMouseEvent)
Also, as far as I can tell there aren't code blocks in the new Google
Groups interface, which is a little backwards. Happy to be corrected on
that!
Patrick
On Wednesday, 14 July 2021 at 3:50:34 am UTC+9:30 James wrote:
> Hi all,
>
> The code below works as expected to get the position of a click in a
> GraphicsLayoutWidget. But if I uncomment the @pyqtSlot() line, then I get
> the following error when I click in the GLW:
>
> TypeError: onClick() missing 1 required positional argument: 'evt'
>
> Should I not be using @pyqtSlot() decorator?
>
> James
>
> PS: I do not see an option to syntax-highlight code blocks in this group.
> Can that be enabled?
>
> import sys
> import pyqtgraph as pg
> from PyQt5 import QtWidgets as qtw
> from PyQt5.QtCore import pyqtSlot
>
> class MainWindow(qtw.QMainWindow):
> def __init__(self, *args, **kwargs): super(MainWindow,
> self).__init__(*args, **kwargs)
>
> self.glw = pg.GraphicsLayoutWidget()
> self.setCentralWidget(self.glw)
> self.glw.scene().sigMouseClicked.connect(self.onClick)
> self.show()
>
> #@pyqtSlot()
>
> def onClick(self, evt):
> print("glw clicked")
> print(evt.scenePos())
>
> if __name__ == "__main__":
> app = qtw.QApplication(sys.argv)
> win = MainWindow()
> app.exec_()
>
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