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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());

    QPen pen(Qt::blue, 20, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin);
    painter.setPen(pen);
    QRect rectangle(option.rect.x(), option.rect.y(), option.rect.width()-10,option.rect.height()-10);
    painter.drawRoundRect(rectangle,10,10);

    QListView::paintEvent(event);
}

    QPainter painter(viewport());
    QPen pen(Qt::green, 10, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin);
    painter.setPen(pen);
    painter.drawText(rect(),Qt::AlignLeft,"Test DRive this List");
    QListView::paintEvent(event);

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

void myView::paintEvent(QPaintEvent *event)
{
    QPainter painter(viewport());
    QPen pen(Qt::green, 10, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin);
    painter.setPen(pen);
    painter.drawRect(rect());
    QListView::paintEvent(event);
}

    my_list->setFrameStyle(QFrame::NoFrame);
    QPalette p = my_list->palette();
    p.setBrush(QPalette::Base, Qt::transparent);
    my_list->setPalette(p);

    myDelegate *delegate = new myDelegate(this);
    my_list->setItemDelegate(delegate);