Programatically add USerRole data to specific cell of QAbstractTableMode

[franco.amato]

QAbstractTableModel does not re-implement setData(), so it is using the implementation from its base class, QAbstractItemModel. The documentation for QAbstractItemModel::setData() says:



So if you have not implemented setData() in your own model (derived from QAbstractTableModel), then using the default setData() method is doing nothing to store your string.

This tutorial would be a good place to start. There is a section on creating an editable model.

Sorry I had misunderstood your previous message.
Yes I implemented a setData from my model.

I write it below:

bool SelectedListModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
    if (!index.isValid())
    {
        return false;
    }
    if (role == Qt::EditRole)
    {
        m_reports[index.row()].replace("actionName", value.toString());
 
        emit dataChanged(index, index);
        return true;
    }
}

bool SelectedListModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
    if (!index.isValid())
    {
        return false;
    }
    if (role == Qt::EditRole)
    {
        m_reports[index.row()].replace("actionName", value.toString());

        emit dataChanged(index, index);
        return true;
    }
}

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It is not clear to me how to add data with a custom role.
Can you help me with a small example?

[d_stranz]

It is not clear to me how to add data with a custom role.

All you have to do is define a new role with the value > Qt:: UserRole, then call setData() with the string you want to add and the new role.

In the code you have posted above, the only time you save anything is when the role == EditRole. If you want setData() to save your string when the role == UserRole + 1, you must add an if () clause for that.

QTableView does not know anything about user roles so it will never ask for it, but you can call data() on your model (or the model index) with this role whenever you want to get the value for your custom role.