how to implement the listwidget delegate?thanks

i want to implement the listwidget delegate,the code as follows:

Code:

---

QWidget *DeComBox::createEditor(QWidget *parent, const QStyleOptionViewItem &option,
                                const QModelIndex &index) const
{
    if(index.column()==0)
    {
        QListWidget* editor=new QListWidget(parent);
        return editor;
    }
    else{
        return QItemDelegate::createEditor(parent, option, index);
    }
}
 
void DeComBox::setEditorData(QWidget *editor, const QModelIndex &index) const
{
    if(index.column()==0)
    {
        QListWidget* editor=qobject_cast<QListWidget*>(editor);
        editor->addItem("eg1");
        editor->addItem("eg2");
        editor->addItem("eg3");
        editor->addItem("eg4");
        editor->setCurrentRow(1);
    }
    else {
        QItemDelegate::setEditorData(editor, index);
    }
}
 
void DeComBox::setModelData(QWidget *editor, QAbstractItemModel *model,
                            const QModelIndex &index) const
{
    if(index.column()==0)
    {
        QListWidget* editor=qobject_cast<QListWidget*>(editor);
        model->setData(index,editor->currentItem()->text(),Qt::EditRole);
    }
    else {
        QItemDelegate::setModelData(editor, model, index);
    }
 
}

---

but not successfully,why, help me , thanks!

What do you want to achieve? Returning a list widget as a editor looks strange. How about a QComboBox?

i implement the QComboBox delegate,and i want to know how to implement a listwidget editor or a tablewidget editor even a custom widget (eg. a tablewidget + a pushbutton)? without regard to the list widget's strange looks,how to do it?thanks.