How to use QList<CustomClass> in python with Shiboken

HugoVS

Hello,
I have a Qt/C++ project that exposes a QList of Requirement to python (with Shiboken6).

This is the requirement class

namespace requirement{
class Requirement
{

public:
  ...
  bunch of attributes
  ...
};
}

This is another class witha slot using QList<Requirement>

namespace requirement{
class RequirementsModelBase{
public Q_SLOTS:
...
    virtual void addRequirements( QList<Requirement> requirements);
...
};
}

And Another class with a signal that I want to connect in python to the addRequirements slot

namespace requirement{
class RequirementsManager
{
    Q_OBJECT
...
Q_SIGNALS:
    void listOfRequirements(QList<requirement::Requirement>);
...
};
}

this is the python script

import sys

from PySide6.QtWidgets import QApplication
from PySide6.QtCore import SIGNAL, SLOT, QObject
from PyTasteQtWidgets import TasteQtWidgets as QtTaste  # after PySide!

def random_slot(value):
    print(dir(value))
if __name__ == "__main__":

    app = QApplication(sys.argv)


    manager = QtTaste.RequirementsManager()
    model = QtTaste.RequirementsModelBase()
    manager.listOfRequirements.connect(random_slot)
    widget = QtTaste.RequirementsWidget("", manager, model)
    widget.show()

    sys.exit(app.exec())

When the signal is emitted I get this error:

TypeError: Can't call meta function because I have no idea how to handle QList<requirement::Requirement>

for the sake of completeness, this is the typesystem xml file used with shiboken:

<?xml version="1.0"?>
<typesystem package="TasteQtWidgets">
    <load-typesystem name="typesystem_widgets.xml" generate="no"/>
    <load-typesystem name="typesystem_core.xml" generate="no"/>
    <load-typesystem name="typesystem_gui.xml" generate="no"/>
    <namespace-type name="requirement" visible="no">
        <object-type name="RequirementsWidget">
        </object-type>
        <object-type name="RequirementsManager">
        </object-type>
	<value-type name="Requirement">
        </value-type>
        <object-type name="RequirementsModelBase">
            <enum-type name="RoleNames"/>
            <enum-type name="HEADER_SECTIONS"/>
        </object-type>
    </namespace-type>
</typesystem>

I didn't find any documentation to use QList with any custom types so maybe someone could give me some hints on how to proceed with this.

Thank you

SGaist

Hi and welcome to devnet,

I haven't used shiboken yet but I am wondering whether the chapter on containers might be what you are looking for.

Hope it helps

friedemannkleint

I think the problem is the invisible namespace. You then get a mismatch between the type names in the Qt meta type system and the ones in Python and so, the QVariant conversion fails.

HugoVS

You were right or at least partially. We set the namespace visibility to yes and updated the Qt version.

Now is working.

Thank you everyone for your help.