function TreeConfigTargetForm::buildForm

Overrides ConfigFormBase::buildForm

File

core/modules/system/tests/modules/form_test/src/Form/TreeConfigTargetForm.php, line 32

Class

TreeConfigTargetForm

Provides a form for configuring preferences and dynamically updating select list options via AJAX.

Namespace

Code

public function buildForm(array $form, FormStateInterface $form_state) {
  $form['vegetables'] = [
    '#type' => 'details',
    '#open' => TRUE,
    '#tree' => TRUE,
    '#input' => TRUE,
    '#title' => $this->t('Vegetable preferences'),
  ];
  $form['vegetables']['favorite'] = [
    '#type' => 'textfield',
    '#title' => $this->t('Favorite'),
    '#default_value' => 'Potato',
    '#config_target' => 'form_test.object:favorite_vegetable',
  ];
  $form['vegetables']['nemesis'] = [
    '#type' => 'textfield',
    '#title' => $this->t('Nemesis'),
    '#config_target' => 'form_test.object:nemesis_vegetable',
  ];
  // Since form_test.object contains translatable values, it must specify a
  // language.
  $form['langcode'] = [
    '#type' => 'value',
    '#value' => 'en',
    '#config_target' => 'form_test.object:langcode',
  ];
  $form['test1'] = [
    '#type' => 'select',
    '#title' => $this->t('Test 1'),
    '#options' => [
      'option1' => $this->t('Option 1'),
      'option2' => $this->t('Option 2'),
    ],
    '#ajax' => [
      'callback' => '::updateOptions',
      'wrapper' => 'edit-test1-wrapper',
    ],
    '#prefix' => '<div id="edit-test1-wrapper">',
    '#suffix' => '</div>',
  ];
  return parent::buildForm($form, $form_state);
}