Frame::Frame(QWidget *parent)
 : QWidget(parent)
{
sb = new QSpinBox(this);
resize(60,60);
}

SpinBoxDelegate::SpinBoxDelegate(QObject *parent)
    : QItemDelegate(parent)
{
}

QWidget *SpinBoxDelegate::createEditor(QWidget *parent,
    const QStyleOptionViewItem &/* option */,
    const QModelIndex &/* index */) const
{
Frame *editor = new Frame(parent);  
    editor->sb->setMinimum(0);
    editor->sb->setMaximum(100);
    return editor;
}

void SpinBoxDelegate::setEditorData(QWidget *editor,
                                    const QModelIndex &index) const
{
    int value = index.model()->data(index, Qt::EditRole).toInt();
    Frame *frame = static_cast<Frame*>(editor);
    frame->sb->setValue(value);
}

void SpinBoxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
                                   const QModelIndex &index) const
{
    Frame *frame = static_cast<Frame*>(editor);
    frame->sb->interpretText();
    int value = frame->sb->value();

    model->setData(index, value, Qt::EditRole);
}
void SpinBoxDelegate::updateEditorGeometry(QWidget *editor,
    const QStyleOptionViewItem &option, const QModelIndex &/* index */) const
{
    editor->setGeometry(option.rect);
}

QStandardItemModel model(4, 2);
    QTableView tableView;
    tableView.setModel(&model);
    SpinBoxDelegate delegate;
    tableView.setItemDelegate(&delegate);
    tableView.setEditTriggers(QAbstractItemView::AllEditTriggers);
    for (int row = 0; row < 4; ++row)
    {
        for (int column = 0; column < 2; ++column)
        {
            QModelIndex index = model.index(row, column, QModelIndex());
            model.setData(index, QVariant((row+1) * (column+1)));
        }
    }
    tableView.setWindowTitle(QObject::tr("Spin Box Delegate"));
    tableView.show();