QTableView horizontalHeaderItem invalid QModelIndex

Question

I have a QTableView and a QSortFilterProxyModel which has a QStandardItemModel as sourcemodel. I'm really desperate because I get an invalid QModelIndex for the following code. Invalid means that column and row of the index is -1 and when I want to get an indexWidget I get null as a widget. I really don't know actually what to expect as row and column from the QModelIndex.

QStandardItemModel* model = static_cast<QStandardItemModel*> (proxyModel.sourceModel());
QModelIndex index = model->horizontalHeaderItem (0)->index ();

I actually want to access individual widgets from the headerView.

If this is a header item, what else do you expect? I think the model index value is reasonable. — vahancho, Jul 14 '17 at 12:27
So do you have another way of accessing a headerItem's widget? — easysaesch, Jul 14 '17 at 12:44

score 0 · Answer 1 · answered Jul 14 '17 at 13:21

Try it this method

connect(m_adminTable, SIGNAL(doubleClicked(QModelIndex)), this, SLOT(onTableDoubleClickedSlot(QModelIndex)));

later

void UsersTableWidget::onTableDoubleClickedSlot(const QModelIndex& modelIndex)
{
    QModelIndex sourceModelIndex = m_adminModelProxy->mapToSource(modelIndex);
    m_currentUserID = m_adminModel->data(sourceModelIndex, Qt::UserRole).toInt(nullptr);//patientIDs.at(row);;

    emit  onUserSelectionChanged(m_currentUserID);
}



QVariant AdminModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
    return QVariant();

if (index.row() >= m_users.size() || index.row() < 0)
    return QVariant();

if (role == Qt::DisplayRole) {
    RowType row = m_users.at(index.row());
    return row.getColumnValue(index.column());
} else if(role == Qt::UserRole) {
    return m_users.at(index.row()).getId();
}
if (role == Qt::TextAlignmentRole)
        return Qt::AlignCenter;
return QVariant();
}

This is an example of my code, I can put an example my TableView model — Vahagn Avagyan, Jul 14 '17 at 13:27

QTableView horizontalHeaderItem invalid QModelIndex

1 Answers1