It's necessary to clarify that model itself doesn't contain any data but only provide access to it. In following example we will create such model derived from QAbstractItemModel.īut to make the example more realistic I suggest to make the model like ListModel but specified for trees so we can add nodes from QML. Provides access to local file system, or QSqlTableModel which provides access to a data base. In the meantime I reworked this implementation, improved data and selection handling. In Qt there are ready to use model classes like QFileSystemModel which I already posted an implementation of a QML TreeView some time ago. To provide a data we must subclass QAbstractItemModel. Therefore, unlike the others views in TreeView to get specified node we must know parent node, not only row or column of element.Īnother major difference is that TreeView doesn't support ListModel. In TreeView each node can contain its own array of nodes. But data structure of TreeView is more complex.Ī data in ListView or TableView is represented by one-dimensional array of nodes.
However, TreeView is only available for desktop platform, and provides inconvenient interfaces.
Since Qt 5.5, Qt provides a component called TreeView for displaying tree hierarchy. In general it looks like other QML views - ListView or TableView. QmlTreeWidget is an open-source QML component, which provide convenient interfaces and customizable stylesheet, and also available for iOS and Android. Second, use listmodel function object get (index) to iterate down and lockup the nested model. And build your model correctly (you using ',' for ListElement items. Since Qt 5.5 we have a new wonderful TreeView, a control we've all been waiting for.Ī TreeView implements a tree representation of items from a model. First, you need to correct the roles to match your new nested model/ListElement's scope/roles.
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