How to call `QAbstractItemModel::setData` from QML view?

kaixoo

I have a question regarding the ability to call QAbstractItemModel::setData from QML code. The function setData has Q_INVOKABLE, so it should be callable from QML. However, it expects a QModelIndex& as the first argument, which doesn't seem obtainable from a QML model.

My question, however, is more general than this. Where can I find resources about editable Qt models? I have read this article on Editable Tree Model Example but it doesn't provide insight on the QML side.

GrecKo

If you are using required properties in your delegates, you can specify delegateModelAccess of your view to DelegateModel.ReadWrite then writing to the required properties will automatically call setData on their corresponding role.
By default you can already do that via the model group object.

If you really want to call QAIM::setData manually, you indeed have to pass a QModelIndex and a role but the index is accessible because the QAIM::index function is also Q_INVOKABLE.

kaixoo

Sorry, this isn't clear enough to me. Do you know if there is any example code about this?

JKSH

@kaixoo said in How to call `QAbstractItemModel::setData` from QML view?:

Sorry, this isn't clear enough to me. Do you know if there is any example code about this?

See the snippet under https://doc.qt.io/qt-6/qtquick-modelviewsdata-modelview.html#changing-model-data

kaixoo

For multiple reasons, calling setData in this case is the only viable option. This is what I have in my head:

ListView {
model: /* ... */
delegate: SomeWidget {
     onEdit: { model.setData(model.index(row, column), someDataToMutate) }
}
}

Column is always 0 in this case, but how is one supposed to get the current row in a QML model-view?