class GuaTable
{
  var $colWidths = array();
  public $headings = null;
  var $rows = array();
  function setHeaders($headings)
  {
    $this->headings = $headings;
    $this->updateColWidths($headings);
  }
  function updateColWidths($colVals)
  {
    $limit = count($colVals);
    for($colIdx=0;$colIdx<$limit;$colIdx++)
    {
      $this->colWidths[$colIdx] = max(strlen($colVals[$colIdx]), $this->colWidths[$colIdx]);
    }
  }
  function addRow($row)
  {
    $this->rows[] = $row;
    $this->updateColWidths($row);
  }
  function padCols($colVals, $underline=false)
  {
    $str = "";
    $line = $underline ? "\n" : "";
    $limit = count($colVals);
    for($colIdx=0;$colIdx<$limit;$colIdx++)
    {
      $width = $this->colWidths[$colIdx] + 2;
      $str .= str_pad($colVals[$colIdx], $width);
      if ($underline)
        $line .= str_pad("", $width,"-");
    }
    return $str.$line;
  }
  function getTable()
  {
    $str = $this->padCols($this->headings, true);
    foreach($this->rows as $row)
    {
      $str .= "\n". $this->padCols($row);
    }
    return $str;
  }
}