I want to set a Qt QML Combobox to a PyQt5 object property

Question

I am writing a small program which uses Qt5 QML as the GUI layer and Python3-PyQt5 to implement the data model.

I now want to display a ComboBox in QML and set its model to a list of enums. How would I export the enum as a property of the python class so that I can reference it in QML?

Preferably I would write this in QML:

ComboBox {
  model: mymodel.car_manufacturers
  onCurrentIndexChanged: mymodel.selected_manufacturer = currentIndex
}

Answer 1

Here is my solution which works good enough for me. In the python code I have the following:

class CarManufacturers(enum.Enum):
    BMW, Mercedes = range(2)

mfcChanged = pyqtSignal()

@pyqtProperty('QStringList', constant=True)
def carmanufacturers(self):
    return [mfc.name for mfc in CarManufacturers]

@pyqtProperty('QString', notify=mfcChanged)
def mfc(self):
    return str(CarManufacturers[self._mfc].value)

@modus.setter
def mfc(self, mfc):
    print('mfc changed to %s' % mfc)
    if self._mfc != CarManufacturers(int(mfc)).name:
        self._mfc = CarManufacturers(int(mfc)).name
        self.mfcChanged.emit()

and in the QML I have:

ComboBox {
    model: myModel.carmanufacturers
    currentIndex: myModel.mfc
    onCurrentIndexChanged: myModel.mfc = currentIndex
}