QLabel text not selectble even when i set Qt::TextSelectableByMouse inside QStyledIte

[umen]

i have simple item delegate from QStyledItemDelegate type inside its paint method i have this code . it renders fine , but the main thing here that i like the text to be
selectable for copy , and this dosn't work .

void ItemDelegate::paintBody( QPainter* painter,
                                    const QStyleOptionViewItem& option,
                                    const QModelIndex& index ) const {
painter->save();                                    
    QLabel *l = new QLabel();
    l->setTextFormat(Qt::RichText);
    l->setTextInteractionFlags(Qt::TextSelectableByMouse);
    l->setGeometry(option.rect);
    l->setText("This is test");
    l->setStyleSheet("QLabel { background-color : transparent; }");
    l->render(painter, option.rect.topLeft());
    painter->restore();   
 
}

void ItemDelegate::paintBody( QPainter* painter,
                                    const QStyleOptionViewItem& option,
                                    const QModelIndex& index ) const {
painter->save();                                    
    QLabel *l = new QLabel();
    l->setTextFormat(Qt::RichText);
    l->setTextInteractionFlags(Qt::TextSelectableByMouse);
    l->setGeometry(option.rect);
    l->setText("This is test");
    l->setStyleSheet("QLabel { background-color : transparent; }");
    l->render(painter, option.rect.topLeft());
    painter->restore();   

}

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