Error rendering with Qpainter

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the program generates a pdf, in this pdf there is a QTextBrowser table and three graphs that are rendered using qPainter.

@ int index=ui->m_tableWidgetLogger->currentRow();
if(index<0)
return;

QPrinter *printer = new QPrinter(QPrinter::HighResolution);

printer->setPaperSize(QPrinter::A4);
printer->setOutputFormat(QPrinter::PdfFormat);
printer->setOrientation(QPrinter::Portrait);
printer->setFullPage(true);
printer->setOutputFileName(fileName);
QPainter p;

// p->begin(printer);

    // Print Summary

       QTableWidget *summaryTab=new QTableWidget();
       m_mainApp->m_table->SetTableWidget(summaryTab);
       summaryTab->setGeometry(0,0,printer->pageRect().width(),printer->pageRect().height());
       summaryTab->setAutoScroll(true);
       m_mainApp->m_table->InitTableSummary(summaryTab);
       m_mainApp->m_table->FillTableSummary(summaryTab,index);
       summaryTab->setAlternatingRowColors(true);
       summaryTab->setFrameShape(QFrame::NoFrame);
       QTextBrowser *editor= new QTextBrowser;
       QTableWidget2QTextBrowser(summaryTab,editor);
       editor->print(printer);

// QPainter painter;
// painter.begin(printer);
// painter.renderHints(QPainter::Antialiasing);
// painter.renderHints(QPainter::RenderHint);

if(m_mainApp->mLoggerList[index].recCurrentAddress)
{

      // Print Graph
    p.begin(printer);

// QWidget render;
// render.paintingActive();
QwtPlotRenderer renderer;
renderer.setDiscardFlag(QwtPlotRenderer::DiscardBackground,false);
renderer.setLayoutFlag(QwtPlotRenderer::KeepFrames,true);
renderer.render(m_plot,&p,QRect(0,printer->height()/2,printer->width(),printer->height()/2.2));
printer->newPage();

    // Print Histogram
    renderer.setDiscardFlag(QwtPlotRenderer::DiscardBackground,false);
    renderer.setLayoutFlag(QwtPlotRenderer::KeepFrames,true);
    renderer.render(m_histogram,&p,QRect(0,0,printer->width(),printer->height()/2.2));
    renderer.render(m_histogram,&p,QRect(0,printer->height()/2,printer->width(),printer->height()/2.2));
    // Print Table

    QTableWidget *table=new QTableWidget();
    m_mainApp->m_table->SetTableWidget(table);
    table->setGeometry(0,0,printer->pageRect().width(),printer->pageRect().height());
    table->setAutoScroll(false);
    m_mainApp->m_table->InitTablePrint(index,printer->pageRect().width());
    int nbPage=m_mainApp->m_table->GetNbPrintPage(index,printer->pageRect().height());


        for(int page=0;page<nbPage;page++)
           {

        m_mainApp->m_table->currentIndex=-1;
        m_mainApp->m_table->InitTablePrint(index,printer->pageRect().width());
        m_mainApp->m_table->FillTablePrint(index,printer->pageRect().height(),page);
        table->render(&p,QPoint(0,0),QRegion(0,0,printer->pageRect().width(),printer->pageRect().height(),QRegion::Rectangle),QWidget::DrawChildren);
       // table->widget->render(&painter,QPoint(0,0),QRegion(0,0,printer->pageRect().width(),printer->pageRect().height(),QRegion::Rectangle),QWidget::DrawChildren);

           }
        p.end();
    }@

the issue is i get the render and the table disappears or the render disappears and table is shown. anyone have any ideas.

_compiler

http://qt-project.org/doc/qt-4.8/qpainter.html#save and http://qt-project.org/doc/qt-4.8/qpainter.html#restore