Qt - How can I make a particular Column of my QTableView as Non Editable?

Question

I have a QTableView with 4 Rows and 4 columns each representing their data's in it. By default the QTableView is editable. Now I want to make any particular column as non editable in my QTableView.

How can I do it?

Thanks in Advance.

score 13 · Answer 1 · edited Jan 08 '17 at 11:00

13

You can use the setItemDelegateForColumn() function. Implement a read-only delegate, and set it for the column you need.

You can also use the flags inside your model, and remove the Qt::ItemIsEditable flag for a specific column.

edited Jan 08 '17 at 11:00

Machta

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answered Sep 27 '12 at 08:01

SingerOfTheFall

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score 12 · Answer 2 · edited Jan 17 '17 at 20:51

12

Something like that may also do it:

class NotEditableDelegate : public QItemDelegate
{
    Q_OBJECT
public:
    explicit NotEditableDelegate(QObject *parent = 0)
        : QItemDelegate(parent)
    {}

protected:
    bool editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
    { return false; }
    QWidget* createEditor(QWidget *, const QStyleOptionViewItem &, const QModelIndex &) const
    { return Q_NULLPTR; }

};

In use:

// Make all the columns except the second read only
for(int c = 0; c < view->model()->columnCount(); c++)
{
    if(c != 1)
        view->setItemDelegateForColumn(c, new NotEditableDelegate(view));
}

edited Jan 17 '17 at 20:51

phyatt

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answered Oct 08 '13 at 14:49

MasterAler

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1

Retrurning true instead of false in editorEvent will prevent createEditor from being called at all, as it consumes the event at that point. – ricekab Nov 25 '19 at 09:48
@ricekab I'm not sure that is true: the doc says "The base implementation returns false (indicating that it has not handled the event)." and according to an experiment I just did returning false for a given `index.colum()` did not stop the editing. – mike rodent Sep 01 '21 at 18:08

score 6 · Answer 3 · edited May 23 '17 at 10:29

6

The easiest way is settting the flag of the item you don't want to be editable in this way:

item->setFlags(item->flags() &  ~Qt::ItemIsEditable);

You can also check this thread: Qt How to make a column in QTableWidget read only

edited May 23 '17 at 10:29

Community

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answered Sep 09 '15 at 20:43

Angie Quijano

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This method works for QTableWidges, but not for QTableViews, which is what the question is asking about. – Soren Stoutner Jun 20 '22 at 21:38
Works on QTableView , Qt 4.8.4. Thanks. – Valentin H Mar 13 '23 at 23:15

score 1 · Answer 4 · edited Mar 22 '16 at 17:18

1

In the overide method just change it to if(!(index.column() == 0) and change the Flag value as Flag |= Qt::ItemisEditable.
This Works Fine.

edited Mar 22 '16 at 17:18

Angie Quijano

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answered Sep 27 '12 at 11:42

New Moon

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I guess you meant overriding `bool QAbstractItemView::edit(const QModelIndex & index, EditTrigger trigger, QEvent * event)` didn't you? In such case you can just return `false` for read-only column. – Michał Walenciak Nov 18 '14 at 19:33

score 1 · Answer 5 · answered Mar 02 '13 at 02:39

1

May be this late, but for future reference. You should set the table view to NoEditTrigger like this:

myTableView->setModel(model);
myTableView->setEditTriggers(QAbstractItemView::NoEditTriggers)

answered Mar 02 '13 at 02:39

SIFE

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Wow, that's the cleanest solution I've seen up to now, especially if you only want the data to be read-only in _one_ of your views on the same model. Thanks! – Charl Botha May 29 '13 at 13:05
16

But how can this method be applied to a single column or row, as OP asks? – Matt Phillips Jun 12 '14 at 12:10

score 1 · Answer 6 · answered May 05 '21 at 18:01

You need to override the 'flags' method and specify the editability parameters of the element for the selected column

Qt::ItemFlags TableModel::flags(const QModelIndex &index) const
{
    if(!index.isValid())
        return Qt::NoItemFlags;
    if(index.column() == SELECTED_COLUMN_NUM)
    {
        return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
    }
    return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsEditable;
}

Qt - How can I make a particular Column of my QTableView as Non Editable?

6 Answers6