QStyledItemDelegate and editor pointer

[Nero]

Hello,
I've a QStyledItemDelegate derived class for a custom delegate editor:

CheckBoxDelegate::CheckBoxDelegate(const QStringList &texts, QObject *parent)
    : QStyledItemDelegate(parent), texts(texts)
{ }
 
QWidget *CheckBoxDelegate::createEditor(QWidget *parent,
                                        const QStyleOptionViewItem &/* option */,
                                        const QModelIndex &index) const
{
    CheckBoxDelegateWidget *editor = new CheckBoxDelegateWidget(texts, parent);
    ...
    return editor;
}

CheckBoxDelegate::CheckBoxDelegate(const QStringList &texts, QObject *parent)
    : QStyledItemDelegate(parent), texts(texts)
{ }

QWidget *CheckBoxDelegate::createEditor(QWidget *parent,
                                        const QStyleOptionViewItem &/* option */,
                                        const QModelIndex &index) const
{
    CheckBoxDelegateWidget *editor = new CheckBoxDelegateWidget(texts, parent);
    ...
    return editor;
}

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Now I want sizeHint() to return the CheckBoxDelegateWidget sizes, like this:

QSize CheckBoxDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index ) const
{
    return editor->sizeHint(); // what editor?
}

QSize CheckBoxDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index ) const
{
    return editor->sizeHint(); // what editor?
}

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Where I can obtain the editor pointer? Why createEditor() doesn't let me do a local copy of the pointer?
Thank you.