function views_photo_grid_plugin_style::validate in Views Photo Grid 7

Validates the view configuration. Fails if there is a non-image field, or there are more than one image fields that are not excluded from display.

Overrides views_plugin_style::validate

File

views/views_photo_grid_plugin_style.inc, line 57

Style plugin for Views Photo Grid.

Class

views_photo_grid_plugin_style

@file Style plugin for Views Photo Grid.

Code

function validate() {
  $errors = parent::validate();
  if (!is_numeric($this->view->vid)) {

    // Skip validation when the view is being created.
    // (the default field is a title field, which would fail.)
    return $errors;
  }

  // Get a list of fields that have been added to the display.
  $fields = $this->display->handler
    ->get_handlers('field');

  // Check if there is exactly one image field to display.
  $fields_valid = TRUE;
  $field_count = 0;
  foreach ($fields as $key => $field) {

    // Ignore fields excluded from display.
    if (!empty($field->options['exclude'])) {
      continue;
    }
    if (empty($field->field_info['type']) || $field->field_info['type'] != 'image') {

      // Cannot display non-image fields. That would break the image grid.
      $fields_valid = FALSE;
      break;
    }
    $field_count++;
  }
  if (!$fields_valid || $field_count > 1) {
    $errors[] = t('This format can display only one image field and no other fields.');
  }
  return $errors;
}