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QHeaderView - suppress "descending" sorting

  • I have some heavy model which is applied to QTreeView through QSortFilterProxyModel.
    There are few columns and I need to have sorting by them - user clicking on appropriate sections in QHeaderView.
    But I need to suppress Ascending/Descending within single column - Need to disable Descending.
    How it can be implemented? - I do not see appropriate API in QHeaderView.

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