![]() Creating your own delegate from scratch is easy, since TreeView offers a set of properties that can be used to position and render each node in the tree correctly. ![]() Qt Quick Controls offers a ready-made TreeViewDelegate that can be used for this, which has the advantage that it works out-of-the-box and renders a tree which follows the style of the platform where the application runs.Įven if TreeViewDelegate is customizable, there might be situations where you want to render the tree in a different way, or ensure that the delegate ends up as minimal as possible, perhaps for performance reasons. To allow for maximum flexibility, TreeView itself will not position the delegate items into a tree structure. This project provides a QML Tree View with a C++ Tree Model for Qt 5.15 and QuickControls 2. 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. By indenting each delegate item in that column according to its parent-child depth in the model, it will end up looking like a tree, even if it's technically still just a flat list of items. TreeView provides a QML type to display data from any QAbstractItemModel. First, you need to correct the roles to match your new nested model/ListElement's scope/roles. Each node in the tree ends up occupying one row in the table, where the first column renders the tree itself. This means that even if the model has a parent-child tree structure, TreeView is internally using a proxy model that converts that structure into a flat table model that can be rendered by TableView. ![]() qmlproperty QAbstractItemModel TreeView :: model. List of all members, including inherited membersĪ TreeView has a model that defines the data to be displayed, and a delegate that defines how the data should be displayed. A TreeView implements a tree representation of items from a model. ![]()
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