QFileSystemModel limit folder depth

[Lucas kim]

I want to limit folder depth using QFileSystemModel.
e.g. C:\folder1\folder2\folder3

Using the QStandardItemModel, folders could be explored one by one.
However, I prefer the fast speed of the QFileSystemModel and I also like the automatic creation of icons.
Please let me know if there is a way to limit the depth of the folder in the QFileSystemModel.
Thank you.

[JonB]

@Lucas-kim
There isn't an in-built support in QFileSystemModel for this. What about:

QTreeView QFileSystemModel - limit expandable to only root

Use some proxy model to limit depth via hasChildren()/rowCount(). ?