QTreeView select parent nodes

[mqt]

I am using a QTreeView. I have three levels of nodes.

1) I want to restrict the user to select/edit only the last level of Nodes
2) When the user select a last level node, I want to highlight all its parents till root level
3) When the user select a last level node, I want to programattically get entire string path from root to selected item (last level)

Any sample code is appreciated. Thanks in advance

[Santosh Reddy]

What is the model are you using? Standard/File/Custom...?

[mqt]

I am using Standard Model.