[PyQt] Multithreaded Update of the QStandardItemModel Data

[Christian Schulze]

Hello,


I'm trying to update the QStandardItemModel data from another thread. This causes several issues:

1.       The error message:
QObject::connect: Cannot queue arguments of type 'QVector<int>'

(Make sure 'QVector<int>' is registered using qRegisterMetaType().)

QObject::connect: Cannot queue arguments of type 'QVector<int>'

(Make sure 'QVector<int>' is registered using qRegisterMetaType().)

QObject::connect: Cannot queue arguments of type 'QVector<int>'

(Make sure 'QVector<int>' is registered using qRegisterMetaType().)

2.       Not all changes are applied. Namely the number of items in the TreeView changes, e.g. if I resize the window.

3.       Often the python.exe crashes on windows
It would be great if someone could tell me how to fix this!



Attached you find a simple (complete) example that illustrates the issues. Tested with Anaconda Python 2/3 and PyQt5.

The first issue seems to occur if a QStandardItem from the item model is modified from the second thread (:45). Adding new items seems to work fine.

The 2. issue suggests that I didn't delete some item. But how could I check if removing the row was successful?

Maybe the 3. issue could be related to some event buffer overflow?


Best regards,
Christian
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