[Interest] How to make a column of a QTableView read-only?

André Somers andre at familiesomers.nl
Mon Jul 2 09:42:40 CEST 2012

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<sh at 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: 

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).


More information about the Interest mailing list