QSS to QStyle

[nen777w]

Hi!
This code applied to QPlainTextEdit:

background-color: rgb(63, 67, 66);
border-style: outset;
border-width: 1px;
border-radius: 6px;
border-color: rgb(63, 67, 66);
padding: 6px;

allows get the rounded text edit field with given bckgnd color.
But, how I can do the same in style class (derrived from QCommonStyle) ?
I little bit investigate the code and all that I can do it's only:

void MyStyle::drawControl(ControlElement element, const QStyleOption *opt, QPainter *p, const QWidget *w) const
{
    switch(element)
    {
    case CE_ShapedFrame:
		{
                p->save();
                p->setRenderHint(QPainter::Antialiasing, true);
                p->setPen(QPen(QColor(63,67,66), f->lineWidth));
                p->setBrush(QColor(63,67,66));
                p->drawRoundedRect(f->rect, 6, 6, Qt::AbsoluteSize);
                p->restore();
        }
    };
}

But it influence only on a frame, but not on background.

Could I define my draw style for a QPlainTextEdit with a QStyle/QCommonStyle inheritance?