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
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