Checkbox in QTreeView

[Talei]

IMHO the 2nd way, without editor in delegate is the way You should go.

This will work like this
QTreeView part:
-> user click on index in QTreeView, change model data (signal click(QModelIndex)) - toggle currently stored value from 0 to 1 and from 1 to 0

QAbstractItemDelegate part:
-> paint() paint's checkbox and use that int value to determine what state it should has. setEditorData() (<- You don't need this one when You don't createEditor()) taht way code is simpler for this purpouse IMHO

Model part:
-> setData(), data()

I don't want write here code for You, but what can help You are examples, especially:
model = qtdir/examples/itemviews/editabletreemodel
delegate = qtdir/examples/itemviews/coloreditorfactory (use checkBox, example uses combobox)