`QTextDocument` creating a singular table HTML to be printed to a PDF

canellas

Hi,

I am trying to print to a PDF file a table like this:

using a code very similar to this:

void MainWindow::on_pushButton_clicked() {
  struct cell {
    char letter{0};
    int16_t id_hori{-1};
    int16_t id_vert{-1};

    bool ver_and_hor() const { return (id_hori != -1) && (id_vert != -1); }
    bool ver() const { return (id_vert != -1); }
    bool hor() const { return (id_hori != -1); }
  };

  using column = std::array<cell, 3>;
  using grid = std::array<column, 4>;

  const grid _grid{
      column{cell{'B', 23, 45}, cell{'U'}, cell{'Y', -1, 9}},
      column{cell{'I'}, cell{}, cell{'E'}},
      column{cell{'L'}, cell{}, cell{'S'}},
      column{cell{'L', 12}, cell{'O'}, cell{'W'}},
  };

  const int _cols{_grid[0].size()};
  const int _rows{_grid.size()};

  QString _html{"<!DOCTYPE html> "
                "<html> "
                "<head> "
                "<style> "
                "table { border-collapse: collapse; } "
                "td { border: 1px solid Gray; } "
                "td.special { border: none; } "
                "td.alignRight { text-align: right; } "
                "td.alignLeft { text-align: left; } "
                "</style> "
                "</head> "
                "<body> "
                "<table style=\"width:100%\"> "};

  int _col_width = 100 / _rows;

  _html += "<tr> ";
  for (int _col = 0; _col < _cols; ++_col) {
    _html += "<th style=\"width: " + QString::number(_col_width) + "%\"></th> ";
  }
  _html += "</tr>";

  for (int _row = 0; _row < _rows; ++_row) {
    _html += "<tr style=\"height:80px\">";
    for (int _col = 0; _col < _cols; ++_col) {
      if (_grid[_row][_col].letter == 0) {
        _html += "<td class=\"special\"></td> ";
      } else if (_grid[_row][_col].ver_and_hor()) {
        _html += "<td <sup>" + QString::number(_grid[_row][_col].id_hori) +
                 "</sup>&nbsp;&nbsp;&nbsp;&nbsp;<sup>" +
                 QString::number(_grid[_row][_col].id_vert) + "</sup></td>";

      } else if (_grid[_row][_col].hor()) {
        _html += "<td class=\"alignLeft\" <sup>" +
                 QString::number(_grid[_row][_col].id_hori) + "</sup> </ td> ";
      } else if (_grid[_row][_col].ver()) {
        _html += "<td class=\"alignRight\" <sup>" +
                 QString::number(_grid[_row][_col].id_vert) + "</sup></td> ";
      } else {
        _html += "<td></td> ";
      }
    }
    _html += "</tr> ";
  }
  _html += "</table> "
           "</body> "
           "</html> ";

  std::ofstream _out("/var/tmp/out.html");
  _out << _html.toStdString();

  QTextDocument _text;
  _text.setHtml(_html);

  QPdfWriter _pdf("/var/tmp/out.pdf");
  _pdf.setPageSize(QPageSize::A4);
  _pdf.setPageOrientation(QPageLayout::Orientation::Portrait);
  _pdf.setPageMargins(QMargins(10, 10, 10, 10), QPageLayout::Millimeter);
  _text.print(&_pdf);
}

Problems:
1 - In cells where must be a superscript number on the left and on the right, I can not use <td class=\"alignLeft\"... and <td class=\"alignRight\"... , so I don't know to align the numbers in this situation.
2 - The superscript number that stays on the left is not superscripted :
3 - In the PDF file the column size is not formatted correctly:

I have very basic knowledge in HTML and in the use of QTextDocument and QPdfWriter, so I am sure I am doing something wrong, and I would mostly appreciate any help.

TIA