drawing formatted QTextDocument

[tuli]

I need to render a QTextDocument formatted by a QSyntaxHighlighter to a raw window.
I figured a way via

painter->translate(x, y);
QAbstractTextDocumentLayout::PaintContext cont;
document()->documentLayout()->draw(painter, cont);

painter->translate(x, y);
QAbstractTextDocumentLayout::PaintContext cont;
document()->documentLayout()->draw(painter, cont);

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but this doesnt allow for centering it in a QRect.
How could i do it like drawing a plain string with a QPainter?

painter->drawText(x,y,w,h,Qt::AlignLeft, mystr);

painter->drawText(x,y,w,h,Qt::AlignLeft, mystr);

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thanks,


edit:
for example, this doesnt work:

document()->drawContents(painter, QRect(x,y,w,h));

document()->drawContents(painter, QRect(x,y,w,h));

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edit2:
Another problem is that the code in the very first code box doesnt use the font selected into QPainter...