formBuilder = $form_builder;
$this->messenger = $messenger;
}
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
return new static(
$configuration,
$plugin_id,
$plugin_definition,
$container->get('form_builder'),
$container->get('messenger')
);
}
/**
* {@inheritdoc}
*/
public function build() {
return $this->formBuilder->getForm($this);
}
/**
* {@inheritdoc}
*/
public function getFormId() {
return 'ajax_forms_test_block';
}
/**
* {@inheritdoc}
*/
public function buildForm(array $form, FormStateInterface $form_state) {
$form['test1'] = [
'#type' => 'select',
'#title' => $this->t('Test 1'),
'#required' => TRUE,
'#options' => [
'option1' => $this->t('Option 1'),
'option2' => $this->t('Option 2'),
],
'#ajax' => [
'callback' => '::updateOptions',
'wrapper' => 'edit-test1-wrapper',
],
'#prefix' => '
',
'#suffix' => '
',
];
$form['actions'] = [
'#type' => 'actions',
];
$form['actions']['submit'] = [
'#type' => 'submit',
'#value' => $this->t('Submit'),
];
return $form;
}
/**
* Updates the options of a select list.
*
* @param array $form
* An associative array containing the structure of the form.
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The current state of the form.
*
* @return array
* The updated form element.
*/
public function updateOptions(array $form, FormStateInterface $form_state) {
$form['test1']['#options']['option1'] = $this->t('Option 1!!!');
$form['test1']['#options'] += [
'option3' => $this->t('Option 3'),
'option4' => $this->t('Option 4'),
];
return $form['test1'];
}
/**
* {@inheritdoc}
*/
public function validateForm(array &$form, FormStateInterface $form_state) {
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
$this->messenger->addStatus('Submission successful.');
}
}