function mathfield_widget_validate in Math Field 7

Validate callback to evaluate the math expression.

1 string reference to 'mathfield_widget_validate'

mathfield_field_widget_form in ./mathfield.module

Implements hook_field_widget_form().

File

./mathfield.module, line 339

Adds a dynamic math expression field.

Code

function mathfield_widget_validate($form, &$form_state) {
  $submitted = $form_state['submitted'];
  $trigger = $form_state['triggering_element'];

  // Evaluate all empty mathfield elements on form submission otherwise only
  // evaluate the triggered mathfield. We cannot evaluate expressions in
  // an #element_validate handler because all dependent fields may not be
  // available yet.
  if ($submitted && !empty($form_state['mathfield'])) {
    foreach ($form_state['mathfield'] as $element) {
      $submitted_value = drupal_array_get_nested_value($form_state['values'], $element['#parents']);
      if (empty($submitted_value) || $element['#widget'] == 'mathfield_markup') {
        _mathfield_evaluate_element($element, $form_state);
      }
    }
  }
  elseif (isset($trigger['#settings']['expression'])) {
    _mathfield_evaluate_element($trigger, $form_state);
  }
}