Is there a native data model from TreeView in QML?

Question

The QT document had implied that any implementation of QAbstractItemModel can be used for TreeView.

These models are usually in C++, which is inconvenient for now.

So is there an native QML model which can be utilized in treeview?

Can I set a QStandardItemModel model from C++, and use this model in qml?

Not that I know of. But maybe this helps you: stackoverflow.com/a/33505913/2056452 (Especially the link to the documentation example) Also keep the comment to it in mind. — derM
For now QML doesn'thave native tree model, you need to implement it by yourself using QStandardItemModel. Here is simple example how to do that. — folibis

Llamma Llamma · Accepted Answer · 2018-01-18T10:57:01

The QStandardItemModel reference gives an example of how to use it for a TreeView:

QStandardItemModel model;
QStandardItem *parentItem = model.invisibleRootItem();
for (int i = 0; i < 4; ++i) {
    QStandardItem *item = new QStandardItem(QString("item %0").arg(i));
    parentItem->appendRow(item);
    parentItem = item;
}

Next to this you can add the model to QML with the following:

view.rootContext.setContextProperty("treeViewModel", model);

You also need the root item from the model to show everything in the Treeview:

view.rootContext.setContextProperty("root", model.indexFromItem(model.invisibleRootItem()));

Now you can add it to you QML TreeView like follows:

  TreeView{
    model: treeViewModel
    rootItem: root

    TableViewColumn {
        role: "display" // is role 0
    }
}

Is there a native data model from TreeView in QML?

2 Answers