QtextTable draw your own boarders

Hello,

I have a text atble i removed the boarders because i want to draw my own.

i want to look like thisAttachment 8478

any one know how to do this.
here is the code if need be

Code:

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QTextDocument *editor = new QTextDocument;
        // editor->setDocumentMargin(25);
 
       //creates writing format
       QTextCharFormat NormalFormat;
        NormalFormat.setFont(QFont("Helvetica",20,QFont::Bold));
 
        QTextBlockFormat block;
       block.setAlignment(Qt::AlignBottom);
 
 
 
       //create pointer to current cursor location
       QTextCursor cursor (editor);
       cursor.beginEditBlock();
 
       cursor.movePosition(QTextCursor::Start);
       cursor.setBlockFormat(block);
                       cursor.insertBlock();
                        cursor.insertBlock();
                         cursor.insertBlock();
                        cursor.insertText("                      ",NormalFormat);
                        cursor.insertText("Escort Data Logger Report",NormalFormat);
                         cursor.insertBlock();
                          cursor.insertBlock();
                           cursor.insertBlock();
 
        QTextTableFormat tableFormat;
        tableFormat.setBackground(QColor("#ffffff"));
       tableFormat.setBorderStyle(QTextFrameFormat::BorderStyle_Inset);
        tableFormat.setBorder(0);
        tableFormat.setCellPadding(2);
        tableFormat.setCellSpacing(4);
 
        tableFormat.setWidth(QTextLength(QTextLength::PercentageLength, 100));
        QTextTable *tab=cursor.insertTable(tabW->rowCount()+1,tabW->columnCount(),tableFormat);
 
 
        QTextFrame *frame=cursor.currentFrame();
 
        QTextFrameFormat frameFormat=frame->frameFormat();
        cursor.insertFrame(frameFormat);
        cursor.setPosition(frame->lastPosition());
        frame->setFrameFormat(frameFormat);
        QTextCharFormat format_entete_tab;
        format_entete_tab.setFontPointSize(15);
        format_entete_tab.setFontWeight(QFont::Bold);
        QTextCharFormat format_cellule;
        format_cellule.setFontPointSize(12);
        for(int i=0;i<tabW->columnCount();i++)
        {
            QTextTableCell titre = tab->cellAt(0,i);// change 0 it moves the title
            QTextCursor cellCursor=titre.firstCursorPosition();
             cellCursor.insertText(tabW->horizontalHeaderItem(i)->text(),format_entete_tab);
        }
        QTextTableCell cell;
        QTextCursor cellCursor;
        for(int row=1;row<tab->rows();row++)
        {
            for(int col=0;col<tab->columns();col++)
            {
                cell=tab->cellAt(row,col);
                cellCursor=cell.firstCursorPosition();
                cellCursor.insertText(tr("%1").arg(tabW->item(row-1,col)->text()),format_cellule);
            }
        }
        cursor.endEditBlock();

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