Op 1-7-2012 21:50, K. Frank schreef: > Hi Sean! > > Thank you for the suggestion. > > On Sun, Jul 1, 2012 at 3:11 PM, Sean Harmer<s...@theharmers.co.uk> wrote: >> Hi K. Frank, >> >> On 01/07/2012 19:50, K. Frank wrote: >>> Hello List! >>> >>> I have a QTableView (backed by a QSqlTableModel) and am looking >>> for a simple way to make a column read-only. Poking around in the >>> documentation, I don't see anything obviously simple. >> Take a look at the function QAbstractItemModel::flags(). You can >> override this in your model such that flags it returns do not include >> Qt::ItemIsEditable for the column you wish to be read-only. > To make sure I understand: > > In my concrete case, I would then derive from QSqlTableModel, > override its flags() member function, and add to the derived class > some kind of setColumnReadonly() member function (or add some > kind of readonlyColumnIndex to its constructor) to tell flags() which > columns to flag as read-only. Is that the idea? > > Also, do i take it correctly from your answer that there isn't another > way that is clearly simpler? > > For me, this approach is fine. But, as an aside, read-only can be > either a model attribute (if the model is read-only or const) or a view > attribute (if you have a read-only view into a non-read-only model). > > In my case, I have only one view into the model, so I can use your > suggested approach to make (a column of) the model read-only. > But, for future reference, what's the best way to make the view > read-only? (For example, what if my application has two views > into the same model, only one of which should be read-only?) > You can use a proxy model to do that. There is a ready-made one that does what you want available on the qt-project wiki: http://qt-project.org/wiki/QSortFilterProxyModel_subclass_for_readonly_columns_columns_with_checkboxes_and_password_columns
If you have multiple views on a single model with different demands for what column should be read-only, you can create multiple proxy models on the same SQL model. One note on the wiki article: for Qt 4.8 and up, you should replace the use of QSortFilterProxyModel with QIdentityProxyModel (as long as you don't need filtering or sorting too, that is). André _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
