How do draw a frame in QListView?

[someralex]

this code work

QPainter painter(viewport()); 
    QPen pen(Qt::green, 10, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin); 
    painter.setPen(pen); 
    painter.drawRect(rect()); 
    painter.translate(-horizontalScrollBar()->value(), -verticalScrollBar()->value()); 
    QListView::paintEvent(event);

QPainter painter(viewport()); 
    QPen pen(Qt::green, 10, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin); 
    painter.setPen(pen); 
    painter.drawRect(rect()); 
    painter.translate(-horizontalScrollBar()->value(), -verticalScrollBar()->value()); 
    QListView::paintEvent(event);

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but :
1.at scrolling of list, top and bottom lines of rectangle erase.If using painter.translate identical effect
2.rectangle paint over item