How to make a cell readonly?

How can i make a cell readonly? I try to set the flags for this cell to Qt::NoItemFlags or only to Qt::ItemIsSelectable but when i doubleclick into the cell i get an exception, because i have not define editdata for these cell.
Thanks

What text of the exeption you are getting?

I get the following exception (see screenshot):

ASSERT: "false" in file src\grid\QtnGridTableView.cpp, line 2554

This asert means that at the beginning of the cell editing grid was unable to convert the value obtained from your model to the type that your cell editor is expected.
You need to ensure that the value obtained from the model using the EditRole role to be the same type as the QVariant returned by GridEditorRepository::defaultValue(EditRole).

P.S. The defaultValue is used when you add row to the grid (for example) and grid fills known cells by default values.

Hi,
you are right. For DisplayRole for the cell I return a QString and for EditRole a QVariant. But the cell is readonly. I define in my model:

Qt::ItemFlags SystemGridModel::flags(const QModelIndex& index) const
{
if (!index.isValid())
{
return Qt::ItemFlags();
}

if(index.column() == TotalLength)
{
return Qt::NoItemFlags;
}

return Qt::ItemIsEnabled | Qt::ItemIsEditable;
}

So there is no data for editing. I found in your code in QtnGridTableView in line 2538 the check,

if (!column->editorRepository()->isEditable())
return true;

but you didn't check the flag. So I can't make an individual cell readonly.
Therefore I make a derived class of your class Grid. I overwrite the method cellClicked and insert the following code:

GridBandedTableView* pView = view<Qtitan::GridBandedTableView>();
QAbstractItemModel* pModel = pView->model();
if(!pModel)
{
return;
}

Qtitan::GridBandedTableColumn* pColumn = (Qtitan::GridBandedTableColumn * pView->getColumn(args->cell()->columnIndex());
if(!pColumn)
{
return;
}

pColumn->editorRepository()->setEditable(pModel->flags(pModel->index(args->cell()->rowIndex(), args->cell()->columnIndex())).testFlag(Qt::ItemIsEditable));

Then it works correct.

But I'm woundering why you didn't check the flags.

Indeed. This is a bug in our code. We will correct errors in a way that you suggested. Fix will be added to the next update.

Please change line:

to:

After that you need to rebuld the component.