--- /dev/null
+<?php
+
+namespace Drupal\form_test\Form;
+
+use Drupal\Core\Form\FormBase;
+use Drupal\Core\Form\FormStateInterface;
+
+class FormTestVerticalTabsAccessForm extends FormBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFormId() {
+ return 'form_test_vertical_tabs_access_form';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildForm(array $form, FormStateInterface $form_state) {
+ $form['vertical_tabs1'] = [
+ '#type' => 'vertical_tabs',
+ ];
+ $form['tab1'] = [
+ '#type' => 'fieldset',
+ '#title' => t('Tab 1'),
+ '#collapsible' => TRUE,
+ '#group' => 'vertical_tabs1',
+ ];
+ $form['tab1']['field1'] = [
+ '#title' => t('Field 1'),
+ '#type' => 'checkbox',
+ '#default_value' => TRUE,
+ ];
+ $form['tab2'] = [
+ '#type' => 'fieldset',
+ '#title' => t('Tab 2'),
+ '#collapsible' => TRUE,
+ '#group' => 'vertical_tabs1',
+ ];
+ $form['tab2']['field2'] = [
+ '#title' => t('Field 2'),
+ '#type' => 'textfield',
+ '#default_value' => 'field2',
+ ];
+
+ $form['fieldset1'] = [
+ '#type' => 'fieldset',
+ '#title' => t('Fieldset'),
+ ];
+ $form['fieldset1']['field3'] = [
+ '#type' => 'checkbox',
+ '#title' => t('Field 3'),
+ '#default_value' => TRUE,
+ ];
+
+ $form['container'] = [
+ '#type' => 'container',
+ ];
+ $form['container']['field4'] = [
+ '#type' => 'checkbox',
+ '#title' => t('Field 4'),
+ '#default_value' => TRUE,
+ ];
+ $form['container']['subcontainer'] = [
+ '#type' => 'container',
+ ];
+ $form['container']['subcontainer']['field5'] = [
+ '#type' => 'checkbox',
+ '#title' => t('Field 5'),
+ '#default_value' => TRUE,
+ ];
+
+ $form['vertical_tabs2'] = [
+ '#type' => 'vertical_tabs',
+ ];
+ $form['tab3'] = [
+ '#type' => 'fieldset',
+ '#title' => t('Tab 3'),
+ '#collapsible' => TRUE,
+ '#group' => 'vertical_tabs2',
+ ];
+ $form['tab3']['field6'] = [
+ '#title' => t('Field 6'),
+ '#type' => 'checkbox',
+ '#default_value' => TRUE,
+ ];
+
+ $form['actions'] = [
+ '#type' => 'actions',
+ ];
+ $form['actions']['submit'] = [
+ '#type' => 'submit',
+ '#value' => t('Submit'),
+ ];
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function validateForm(array &$form, FormStateInterface $form_state) {
+ $values = $form_state->getValues();
+ if (empty($values['field1'])) {
+ $form_state->setErrorByName('tab1][field1', t('This checkbox inside a vertical tab does not have its default value.'));
+ }
+ if ($values['field2'] != 'field2') {
+ $form_state->setErrorByName('tab2][field2', t('This textfield inside a vertical tab does not have its default value.'));
+ }
+ if (empty($values['field3'])) {
+ $form_state->setErrorByName('fieldset][field3', t('This checkbox inside a fieldset does not have its default value.'));
+ }
+ if (empty($values['field4'])) {
+ $form_state->setErrorByName('container][field4', t('This checkbox inside a container does not have its default value.'));
+ }
+ if (empty($values['field5'])) {
+ $form_state->setErrorByName('container][subcontainer][field5', t('This checkbox inside a nested container does not have its default value.'));
+ }
+ if (empty($values['field5'])) {
+ $form_state->setErrorByName('tab3][field6', t('This checkbox inside a vertical tab whose fieldset access is allowed does not have its default value.'));
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ drupal_set_message(t('The form submitted correctly.'));
+ }
+
+}