Spreadsheet-like table headers

I'd like to thank you for your patch. It was really useful for my project. You can find the patch of my project with your patch included in it at http://drupal.org/node/1094568

A cleaner solution could be adding a custom format to tablefield, and defining it in our own module.

PROS: no modifications to tablefield module

CONS: the table header is not a "th" tag but a "td" with a bold font

HOWTO: my module is named "casaconvenienza" (so search and replace it with your module name), so I added a "Tabular View (vertical headers)" with hook_field_formatter_info():

function casaconvenienza_field_formatter_info() {
  return array(
    'casaconvenienza_tablefield_vertical_headers' => array(
      'label' => t('Tabular View (vertical headers)'),
      'field types' => array('tablefield'),
    ),
  );
} // casaconvenienza_field_formatter_info

then I defined my hook_field_formatter_view for the given formatter copying and slightly modifying the tablefield function:

function casaconvenienza_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
  $element = array();

  // casaconvenienza_tablefield_vertical_headers
  if ($display['type'] == 'casaconvenienza_tablefield_vertical_headers') {
    // *** CUT && PASTE FROM TABLEFIELD MODULE ***
    $settings = $display['settings'];
    $formatter = $display['type'];

    foreach ($items as $delta => $table) {

      // Rationalize the stored data
      if (!empty($table['tablefield'])) {
        $tabledata = tablefield_rationalize_table($table['tablefield']);
      }
      elseif (!empty($table['value'])) {
        $tabledata = tablefield_rationalize_table(unserialize($table['value']));
      }

      // Run the table through input filters
      if (isset($tabledata)) {
        if (!empty($tabledata)) {
          foreach ($tabledata as $row_key => $row) {
            foreach ($row as $col_key => $cell) {
              if (!empty($table['format'])) {
                $tabledata[$row_key][$col_key] = array('data' => check_markup($cell, $table['format']), 'class' => array('row_' . $row_key, 'col_' . $col_key));
              }
              else {
                if (intval($cell) != 0) $cell .= '%';
                $tabledata[$row_key][$col_key] = array('data' => check_plain($cell), 'class' => array('row_' . $row_key, 'col_' . $col_key));
              }
            }
          }
        }

        // Pull the header for theming <-- *** THIS IS THE ONLY CUSTOMIZATION ***
        $header = array(); //array_shift($tabledata);

        // Theme the table for display
        $element[$delta]['#markup'] = theme('tablefield_view', array('header' => $header, 'rows' => $tabledata, 'delta' => $delta));
      }
    }
  } // casaconvenienza_tablefield_vertical_headers

  return $element;
} // casaconvenienza_field_formatter_view

This actually removes the table headers, then I put the "strong" font with CSS:

.tablefield .col_0 {
  font-weight: bold !important;
}

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