Hi Christian, sorry for the delay. Yes, the signal is declared in the class but not inside any function. I had not used the @Slot decorator but tried it just now to no avail. [image: image.png] [image: image.png] [image: image.png]
On Tue, Aug 30, 2022 at 7:21 PM Cristián Maureira-Fredes < cristian.maureira-fre...@qt.io> wrote: > > > On 8/30/22 00:08, Frank Rueter wrote: > > Hi all, > > > > Hey Frank, > > > probably a pre-coffee hiccup: > > I have this weird issue where my signal connection only works when > > utilising lambda, even though the data type sent by the signal is > > exactly what the receiving slot needs. > > This is my code: > > > > In a worker class (QRunnable) I emit this signal > > * tasks_data_available = QtCore.Signal(list) > > * > > > > Just a sanity check: > That's declared inside a class, but not inside any method, right? > > > In my main widget I connect it like this: > > * worker.tasks_data_available.connect(self.__prep_task_data) > > * > > the slot looks like this: > > * def __prep_task_data(self, task_list): > > * > > * print(task_list)* > > Is this method decorated with a `@Slot(list)` ? > > @Slot(list) > def __prep_task_data(elf, task_list): > ... > > > I have done this countless times, but for some reason in this case the > > code never calls the slot when the QRunnable emits task_list. > > > > When I do this it works though: > > * worker.tasks_data_available.connect(lambda t: > > self.__prep_task_data(t)) > > * > > This might be due to the lazy registration of the lambda as a Slot, > without properly going through the Slot-registration process. > > > What am I missing? I should not have to use lambda in this case. > > It might be the missing @Slot, > but let me know if that's not the case. > > > Cheers, > > frank > > > Cheers > > -- > Dr. Cristián Maureira-Fredes > Senior R&D Manager > > The Qt Company GmbH > Erich-Thilo-Str. 10 > D-12489 Berlin > > Geschäftsführer: Mika Pälsi, > Juha Varelius, Jouni Lintunen > Sitz der Gesellschaft: Berlin, > Registergericht: Amtsgericht > Charlottenburg, HRB 144331 B > _______________________________________________ > PySide mailing list > PySide@qt-project.org > https://lists.qt-project.org/listinfo/pyside >
_______________________________________________ PySide mailing list PySide@qt-project.org https://lists.qt-project.org/listinfo/pyside