Вставить в TableWidget комбобоксы

#include <QtGui>
#include <QtSql>
 
#include "UserTypeDelegate.h"
 
//! [0]
UserTypeDelegate::UserTypeDelegate(QObject *parent)
    : QStyledItemDelegate(parent)
{
}
//! [0]
 
//! [1]
QWidget *UserTypeDelegate::createEditor(QWidget *parent,
                                     const QStyleOptionViewItem & /* option */,
                                     const QModelIndex &index) const
{
    if (index.column() == 1) {
        QComboBox *comboBox = new QComboBox(parent);
        QSqlQuery query;
        query.prepare("SELECT `type_description` FROM `phones_type_reference`;");
        if(!query.exec()){
            qDebug("opa-pa");
        } else {
            QSqlRecord rec = query.record();
            while(query.next()){
                comboBox->addItem(tr(query.value(rec.indexOf("type_description")).toString().toAscii().data()));
            }
        }
        connect(comboBox, SIGNAL(activated(int)), this, SLOT(emitCommitData()));
 
        return comboBox;
    } else {
        QLineEdit* qle = new QLineEdit(parent);
        //connect(qle, SIGNAL(catchFocus()), this,SLOT(qlineFocus()));
        qle->setStyleSheet(qle->styleSheet()+"QLineEdit{background-color: white;}" );
        connect(qle, SIGNAL(editingFinished()), this, SLOT(emitCommitData()));
        return qle;
    }
}
 
//! [1]
 
//! [2]
void UserTypeDelegate::setEditorData(QWidget *editor,
                                  const QModelIndex &index) const
{
    QComboBox *comboBox = qobject_cast<QComboBox *>(editor);
    if (!comboBox){
    } else  {
        int pos = comboBox->findText(index.model()->data(index).toString(), Qt::MatchExactly);
        comboBox->setCurrentIndex(pos);
    }
    QLineEdit *line = qobject_cast<QLineEdit *>(editor);
    if (!line){
    } else  {
        line->setText(index.model()->data(index).toString());
    }
 
}
//! [2]
 
//! [3]
void UserTypeDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
                                 const QModelIndex &index) const
{
    QComboBox *comboBox = qobject_cast<QComboBox *>(editor);
    if (!comboBox){
    } else  {
        model->setData(index, comboBox->currentText());
    }
    QLineEdit *line = qobject_cast<QLineEdit *>(editor);
    if (!line){
    } else  {
        model->setData(index, line->text());
    }
}
//! [3]
 
//! [4]
void UserTypeDelegate::emitCommitData()
{
    emit commitData(qobject_cast<QWidget *>(sender()));
}
//! [4]

    UserTypeDelegate* pd = new UserTypeDelegate(this);
    (QTableWidget)->setItemDelegate(pd);

enum{НЕПОНИМАТЬ/НЕУМЕТЬГУГЛИТЬ/ВЗЯЛСЯНЕПОСИЛАМ/ДУГОЙВАРИАНТ}problem;

#ifndef USERTYPEDELEGATE_H
#define USERTYPEDELEGATE_H
 
#include <QStyledItemDelegate>
#include "custdialog.h"
 
//! [0]
class UserTypeDelegate : public QStyledItemDelegate
{
    Q_OBJECT
 
public:
    UserTypeDelegate(QObject *parent = 0);
//! [0]
 
//! [1]
    QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
                          const QModelIndex &index) const;
    void setEditorData(QWidget *editor, const QModelIndex &index) const;
    void setModelData(QWidget *editor, QAbstractItemModel *model,
                      const QModelIndex &index) const;
 
//! [1] //! [2]
private slots:
    void emitCommitData();
};
//! [2]
 
#endif

UserTypeDelegate : public QStyledItemDelegate