Clarification about dataChanged

[wysota]

Can the method emit dataChanged() when item is inserted or I must use beginInsertRows/endInsertRows?

It must use beginInsertRows() and endInsertRows().

Or do both of beginInsertRows and endInsertRows emit dataChanged()?

They don't. dataChanged() is emitted only for existing indexes (there has to be some data first for it to change).

[airbites]

Thank you wysota. That really makes things clear