How to make a partially editable tree model in Qt

Question

I want to change the editable tree view example that qt provides so that the first column is not editable, while the next one is.

Here is the repo: https://github.com/pyqt/examples/tree/master/itemviews/editabletreemodel

I know it has something to do with the flags. In editabletreemodel.py they have a class TreeModel.

    def flags(self, index):

        
        if not index.isValid():
            return 0

        return Qt.ItemIsEditable | super(TreeModel, self).flags(index)

I can change from Qt.ItemIsEditable to Qt.ItemIsSelectable, and this would make all fields uneditable. But this is not what I want

Basically I want to make the Title column selectable and the Description column editable, how can I get this behavior?

Answer 1

Just check for the index column in the flags() implementation and then remove the ItemIsEditable flag using the exclusive binary operator:

def flags(self, index):
    flags = super(TreeModel, self).flags(index)
    if index.column() == 0:
        flags &= ~Qt.ItemIsEditable
    return flags

This is assuming that you're using a super class that always provides editable items, otherwise just add the flag (the default QAbstractItemModel returns only selectable and enabled items):

def flags(self, index):
    flags = super(TreeModel, self).flags(index)
    if index.column() > 0:
        flags |= Qt.ItemIsEditable
    return flags