How do draw a frame in QListView?

[someralex]

qt-4.2

I try to draw this way:

myView::myView(QWidget *parent) 
    : QListView(parent) 
{ 
} 
 
void myView::paintEvent(QPaintEvent *event) 
{ 
 
    QStyleOptionViewItem option = viewOptions(); 
 
    QPainter painter(viewport()); 
    painter.save(); 
 
    QPen pen(Qt::blue, 5, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin); 
    painter.setPen(pen); 
    QRectF rectangle(option.rect.x(), option.rect.y(), option.rect.width(),option.rect.height()); 
    painter.drawRoundRect(rectangle,5,5); 
    painter.restore(); 
}

myView::myView(QWidget *parent) 
    : QListView(parent) 
{ 
} 

void myView::paintEvent(QPaintEvent *event) 
{ 

    QStyleOptionViewItem option = viewOptions(); 

    QPainter painter(viewport()); 
    painter.save(); 

    QPen pen(Qt::blue, 5, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin); 
    painter.setPen(pen); 
    QRectF rectangle(option.rect.x(), option.rect.y(), option.rect.width(),option.rect.height()); 
    painter.drawRoundRect(rectangle,5,5); 
    painter.restore(); 
}

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but all items are being overlaped, though the scroll works and you can see that there are items there (behind the rectangle) How to draw on background behind items?