QModelIndex.column() error in QColumnView?

[tlustoch]

Hello.
I have pretty simple QColumnView and I have assigned to it simple model:

QColumnView *columnView = new QColumnView(this);
 
QStandardItemModel *model;
QStandardItem *parentItem = model->invisibleRootItem();
for (int i = 0; i < 4; ++i) {
    QStandardItem *item = new QStandardItem(QString("item %0").arg(i));
    parentItem->appendRow(item);
    parentItem = item;
}
 
columnView->setModel(model);

QColumnView *columnView = new QColumnView(this);

QStandardItemModel *model;
QStandardItem *parentItem = model->invisibleRootItem();
for (int i = 0; i < 4; ++i) {
    QStandardItem *item = new QStandardItem(QString("item %0").arg(i));
    parentItem->appendRow(item);
    parentItem = item;
}

columnView->setModel(model);

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But now when I for example use signal QColumnView::activated(const QModelIndex &index), the index.row() and index.column() is always 0, no matter on what item I click. And it's same also for other signals/functions. Is it a bug or am I doing something wrong? I just need to know, what item in QColumnView was activated.

Thank for help,
tlustoch