/** * {@inheritdoc} */ public function validateConfigurationForm(array &$form, FormStateInterface $form_state) { parent::validateConfigurationForm($form, $form_state); if ($form_state->isValueEmpty('width') && $form_state->isValueEmpty('height')) { $form_state->setErrorByName('data', $this->t('Width and height can not both be blank.')); } }
/** * {@inheritdoc} */ public function validateConfigurationForm(array &$form, FormStateInterface $form_state) { parent::validateConfigurationForm($form, $form_state); if (empty($form_state['values']['width']) && empty($form_state['values']['height'])) { form_set_error('data', $form_state, $this->t('Width and height can not both be blank.')); } }