>> Just to make sure I understood, do you need a proxy model that allows to reorder the rows of a given source model via DND?
No, what I need is a proxy model which can reorder its own rows via DND without modifying the source model. In fact I want this: ReorderingModel <=> FilteringModel <=> SourceModel >> QPersistentModelIndex. But it sounds like it's not _really_ needed, you need a way to map integers (row numbers from the source model) into other integers (row numbers after the proxy). Any sample demonstrating how to do it? Also, even without a proxy model I see some weird behaviour, like 'setItemData' gets called not for all the roles on drag-n-drop completion. As the result row entry is moved only 'partially'. I feel like either I'm missing something or this whole area (rows reordering via drag-n-drop) is so rarely used that it has more bugs than it should. On Mon, Oct 12, 2020 at 11:09 PM Александр Иваш <elder...@gmail.com> wrote: > > >> Just to make sure I understood, do you need a proxy model that allows to > reorder the rows of a given source model via DND? > > No, what I need is a proxy model which can reorder its own rows via > DND without modifying the source model. In fact I want this: > ReorderingModel <=> FilteringModel <=> SourceModel > > >> QPersistentModelIndex. But it sounds like it's not _really_ needed, you > need a way to map integers (row numbers from the source model) into > other integers (row numbers after the proxy). > > Any sample demonstrating how to do it? > > > On Mon, Oct 12, 2020 at 9:46 PM Giuseppe D'Angelo via Interest > <interest@qt-project.org> wrote: > > > > Il 12/10/20 15:31, Александр Иваш ha scritto: > > > Is there any example for re-ordering of QTableView entries implemented > > > in QSortFilterProxyModel (ideally drag-n-drop-driven)? If not, what is > > > the best way to implement it? I'm thinking about implementing > > > reordering as 'custom sorting' - but it will require me to collect all > > > the QModelIndex-es in the separate list (which can be then reordered > > > and used for custom sorting). > > > > Just to make sure I understood, do you need a proxy model that allows to > > reorder the rows of a given source model via DND? > > > > > The issue with such approach is that > > > QModelIndex-es are short-living and I need to track its lifetime > > > somehow.... Any better ideas? > > > > QPersistentModelIndex. But it sounds like it's not _really_ needed, you > > need a way to map integers (row numbers from the source model) into > > other integers (row numbers after the proxy). > > > > HTH, > > > > -- > > Giuseppe D'Angelo | giuseppe.dang...@kdab.com | Senior Software Engineer > > KDAB (France) S.A.S., a KDAB Group company > > Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com > > KDAB - The Qt, C++ and OpenGL Experts > > > > _______________________________________________ > > Interest mailing list > > Interest@qt-project.org > > https://lists.qt-project.org/listinfo/interest _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
