function field_example_3text_validate in Examples for Developers 7

Validate the individual fields and then convert to RGB string.

Related topics

1 string reference to 'field_example_3text_validate'

field_example_field_widget_form in field_example/field_example.module

Implements hook_field_widget_form().

File

field_example/field_example.module, line 320

An example field using the Field Types API.

Code

function field_example_3text_validate($element, &$form_state) {

  // @todo: Isn't there a better way to find out which element?
  $delta = $element['#delta'];
  $field = $form_state['field'][$element['#field_name']][$element['#language']]['field'];
  $field_name = $field['field_name'];
  if (isset($form_state['values'][$field_name][$element['#language']][$delta]['rgb'])) {
    $values = $form_state['values'][$field_name][$element['#language']][$delta]['rgb'];
    foreach (array(
      'r',
      'g',
      'b',
    ) as $colorfield) {
      $colorfield_value = hexdec($values[$colorfield]);

      // If they left any empty, we'll set the value empty and quit.
      if (strlen($values[$colorfield]) == 0) {
        form_set_value($element, '', $form_state);
        return;
      }

      // If they gave us anything that's not hex, reject it.
      if (strlen($values[$colorfield]) != 2 || $colorfield_value < 0 || $colorfield_value > 255) {
        form_error($element[$colorfield], t("Saturation value must be a 2-digit hexadecimal value between 00 and ff."));
      }
    }
    $value = sprintf('#%02s%02s%02s', $values['r'], $values['g'], $values['b']);
    form_set_value($element, $value, $form_state);
  }
}