How is the custom addition of elements in the TreeView implemented?

Question

Qt

For example, there are two buttons: "Add root" and "Add sub root". The first one adds the root element to the tree. There are no problems here. The second button should add a child element to the selected root node. How can such a thing be realized? I have already done this in C#/WinForms, but there were separate methods for this, how are things in Qt? Qt itself is new to me, of course.

Answer 1

Through models. https://doc.qt.io/qt-5/qtreeview.html