i want to build an empty table in Qt which output into a pdf

here is what i got so far but im having issue. Is there something im missing, it's a bit messy i know i was doing some testing

Qt Code: 
  1. QApplication a(argc, argv);
  2.  
  3.         float j= 5;
  4.     QPrinter printer;
  5.         printer.setPageMargins(j,j,j,j,QPrinter::Inch);
  6.         printer.setOutputFormat(QPrinter::PdfFormat);
  7.         printer.setPageSize(QPrinter::A4);
  8.         printer.printRange();
  9.         printer.setOutputFileName("C:\\qtpdf\\test.pdf");
  10.         QPainter painter;
  11.         if (! painter.begin(&printer)) { // failed to open file
  12.             qWarning("failed to open file, is it writable?");
  13.             return 1;
  14.         }
  15.  
  16.  
  17.         printer.newPage();
  18.         //creates writing format
  19.         QTextCharFormat NormalFormat;
  20.  
  21.  
  22.         //create pointer to current cursor location
  23.         QTextCursor cursor;
  24.         cursor.beginEditBlock();
  25.  
  26.         QTextTableFormat tableFormat;
  27.  
  28.         tableFormat.setBackground(QColor("#ffffff"));
  29.         tableFormat.setCellPadding(4);
  30.         tableFormat.setCellSpacing(3);
  31.         tableFormat.setBottomMargin(2);
  32.  
  33.         QTextTable *tab = cursor.insertTable(30,30);
  34.  
  35.  
  36. //        tab->insertRows(20,1000);
  37. //        tab->insertColumns(20,10);
  38.  
  39. //        QTextFrame *frame=cursor.currentFrame();
  40. //        QTextFrameFormat frameFormat;
  41. //        frameFormat.setBorder(0);
  42. //        frameFormat.setBorderStyle(QTextFrameFormat::BorderStyle_Inset);
  43. //        frameFormat.setPageBreakPolicy(QTextFormat::PageBreak_Auto);
  44. //        cursor.movePosition(QTextCursor::NextBlock);
  45. //        QTextCharFormat format_entete_tab;
  46. //        format_entete_tab.setFontPointSize(15);
  47. //        format_entete_tab.setFontWeight(QFont::Bold);
  48.  
  49. //        QTextCharFormat format_cellule;
  50. //        format_cellule.setFontPointSize(11);
  51.  
  52. ////        for(int i=0;i<100;i++)
  53. ////        {
  54. ////            //QTextTableCell titre = tab->cellAt(0,i);
  55. ////             tab->cellAt(0,i);
  56. ////            //QTextCursor cellCursor=titre.firstCursorPosition();
  57. ////             QTextCursor cellCursor;
  58. ////             cellCursor.insertText("hello");
  59. ////        }
  60. //        QTextTableCell cell;
  61.  
  62. //        QTextCursor cellCursor;
  63. //        for(int row=1;row<500;row++)
  64. //        {
  65. //            for(int col=0;col<60;col++)
  66. //            {
  67. //                cell.firstPosition();
  68. //                //cellCursor=cell.firstCursorPosition();
  69. //                cellCursor.insertText("bye");
  70. //            }
  71. //        }
  72.  
  73. //        cursor.endEditBlock();
  74.  
  75.         painter.drawText(10, 10, "Test");
  76.         painter.drawText(100,100,"hello world");
  77.        // ret=renderToImage();
  78.  
  79.         int x,y,z,h;
  80.         h= 950;
  81.         z= 950;
  82.         y= 450;
  83.         x= 10;
  84.         QRect rec(x,y,z,h);
  85.         QRect rec2(20,0,100,100);
  86.  
  87.          if (h>j)
  88.          {
  89.  
  90.                  printer.newPage();
  91.  
  92.          }
  93.  
  94.          painter.drawRect(rec);
  95.          painter.drawRect(rec2);
  96.         // painter.drawRect(rec3);
  97.          printer.pageRect();
  98.          painter.drawText(rec,Qt::AlignLeft,"Left");
  99.          painter.drawText(rec,Qt::AlignCenter,"Center");
  100.          painter.drawText(rec,Qt::AlignRight,"Right");
  101.          painter.drawText(rec,Qt::AlignBottom,"low");
  102.          painter.drawText(rec2,Qt::AlignLeft,"No");
  103.          painter.drawText(rec2,Qt::AlignCenter,"Maybe");
  104.          painter.drawText(rec2,Qt::AlignRight,"Yes");
  105.  
  106.  
  107.              printer.newPage();
  108.          printer.fullPage();
  109.         if (! printer.newPage()) {
  110.             qWarning("failed in flushing page to disk, disk full?");
  111.             return 1;
  112.         }
  113.         painter.setBrush(Qt::SolidPattern);
  114.          int r,e;
  115.          r=10;
  116.          e=50;
  117.         QString hi = "aaaaaaa";
  118.         QPen pen(Qt::black, 2, Qt::SolidLine);
  119.         painter.setPen(pen);
  120.         QLineF line(10,10,685,10);
  121.         painter.drawLine(line);
  122.  
  123.         painter.end();
  124.  
  125.  
  126.  
  127.  
  128.     MainWindow w;
  129.     w.show();
  130.  
  131.     return a.exec();
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