Insert QwtPlot inside QTextDocument...difficult to do

Apparently, what I state in the title is not yet possible:

Code:

---

QPainter p;
          int pw = printer->pageRect().width();
          int ph =printer->pageRect().height();
          p.setViewport(printer->pageRect());
          printer->setPageSize(QPrinter::A4);
          p.begin(printer);
 
 
         m_document->setPageSize(printer->pageRect().size());
        m_document->drawContents(&p);
 
         printer->newPage();
 
        QRect rec(-10,0.4*ph,pw-10,0.6*ph);
 
        if (solarDiagram)
                solarDiagram->print(&p,rec,filter);

---

m_document has just a simple Html String.
The qwtPlot goes to the second page and it's visible. But the text on the first page is ultra-small. It seems that the painter is painting on a wrong rectangle,isnt'it?