QComboBox delegate, динамический список

#include <QItemDelegate>
#include <QModelIndex>
#include <QObject>
#include <QSize>
#include <QComboBox>
 
class ComboBoxDelegate : public QItemDelegate
{
    Q_OBJECT
 
public:
    ComboBoxDelegate(QObject *parent = 0);
 
    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;
 
    void updateEditorGeometry(QWidget *editor,
        const QStyleOptionViewItem &option, const QModelIndex &index) const;
};

#include <QtGui>
#include "comboboxdelegae.h"
 
ComboBoxDelegate::ComboBoxDelegate(QObject *parent)
    : QItemDelegate(parent)
{
}
 
QWidget *ComboBoxDelegate::createEditor(QWidget *parent,
    const QStyleOptionViewItem &/* option */,
    const QModelIndex &/* index */) const
{
    QComboBox *editor = new QComboBox(parent);
    
    return editor;
}
 
 
void ComboBoxDelegate::setEditorData(QWidget *editor,
                                    const QModelIndex &index) const
{
    QString value = index.model()->data(index, Qt::EditRole).toString();
 
    QComboBox *comboBox = static_cast<QComboBox*>(editor);
    comboBox->addItem(value);
}
 
 
void ComboBoxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
                                   const QModelIndex &index) const
{
    QComboBox *comboBox = static_cast<QComboBox*>(editor);
    QString value = comboBox->itemText(comboBox->currentIndex());
    model->setData(index, value, Qt::EditRole);
}
 
 
void ComboBoxDelegate::updateEditorGeometry(QWidget *editor,
    const QStyleOptionViewItem &option, const QModelIndex &/* index */) const
{
    editor->setGeometry(option.rect);
}

QWidget *ComboBoxDelegate::createEditor(QWidget *parent,
    const QStyleOptionViewItem &/* option */,
    const QModelIndex &/* index */) const
{
    QComboBox *editor = new QComboBox(parent);
 
    editor->clear();
    editor->insertItems(editor->count(), itemsList);
 
    return editor;
}

void ComboBoxDelegate::setEditorData(QWidget *editor,
                                    const QModelIndex &index) const
{
    QString value = index.model()->data(index, Qt::EditRole).toString();
 
    QComboBox *comboBox = static_cast<QComboBox*>(editor);
    comboBox->addItem(value);
}