Slot not working with QAbstractListModel in Qml

Jim Gir

Hi,
I have a ItemModelclass inherited from QAbstractListModel with the following method :

@Slot()
def bla(self):
   print('bla')

the class is added via qmlRegisterType.

Inside a ListView :

model: ItemModel {}

// then in delegate
Button {
onClicked: model.bla()
}

CLicking the button returns in the console :
TypeError: Property 'bla' of object QQmlDMAAbstractItemModelData(0x2cba320) is not a function

QAbstractListModel is inheriting from QObject so I can't the see where I'm wrong.

thanks for help
Jimmy

SGaist

Hi,

Please post a complete minimal example that reproduces what you are currently getting.

Jim Gir

import sys

import PySide2
from PySide2.QtGui import QGuiApplication
from PySide2.QtQml import QQmlApplicationEngine, qmlRegisterType
from PySide2.QtCore import (
    QUrl,
    QAbstractListModel,
)
import typing
from PySide2.QtCore import QObject, Slot, Qt

class ItemModel(QAbstractListModel):

    def __init__(self, parent=None):
        self._datas = ['un', 'deux', 'trois']
        super().__init__(parent=parent)


    def rowCount(self, parent):
        return len(self._datas)

    def data(self, index, role):
        if not index.isValid():
            return None
        elif role == Qt.DisplayRole:
            return self._datas[index.row()]
        else:
            return None

    @Slot()
    def bla(self):
        print("bla")

if __name__ == "__main__":
    app = QGuiApplication(sys.argv)
    engine = QQmlApplicationEngine()
    qmlRegisterType(ItemModel, "ItemModel", 1, 0, "ItemModel")

    engine.load(QUrl("main.qml"))

    if not engine.rootObjects():
        sys.exit(-1)

    sys.exit(app.exec_())

import QtQuick 2.0
import QtQuick.Layouts 1.12
import QtQuick.Controls 2.12
import ItemModel 1.0


ApplicationWindow {
    id: page
    width: 800
    height: 400
    visible: true

    ListView {
        id: listView
        height: 200
        width: 150
        model: ItemModel {}
        clip: true
        delegate: Item {
            width: page.width
            height: 50
            RowLayout {
                Button {
                    text: model.display
                    height: 30
                    onClicked: model.bla()
                }


        }
    }
    }
    }

error : file:///xx/xx/xx/xx/xx/xx/main.qml:67: TypeError: Property 'bla' of object QQmlDMAbstractItemModelData(0x2db34b0) is not a function

SGaist

The way you do it, you are in fact accessing a wrapper class and not your class directly.

You should rather create an object of your ItemModel type and then access that object when needed. See:

import QtQuick 2.0
import QtQuick.Layouts 1.12
import QtQuick.Controls 2.12
import ItemModel 1.0


ApplicationWindow {
    id: page
    width: 800
    height: 400
    visible: true

    ItemModel {
        id: myModel
    }

    ListView {
        id: listView
        height: 200
        width: 150
        model: myModel
        clip: true
        delegate: Item {
            width: page.width
            height: 50
            RowLayout {
                Button {
                    text: model.display
                    height: 30
                    onClicked: myModel.bla()
                }
            }
        }
    }
}

Jim Gir

ok great ti works