View source
<?php
namespace Drupal\webform_test_element\Plugin\WebformElement;
use Drupal\Component\Utility\NestedArray;
use Drupal\Core\Form\FormStateInterface;
use Drupal\webform\Element\WebformAjaxElementTrait;
use Drupal\webform\Plugin\WebformElementBase;
class WebformTestElementProperties extends WebformElementBase {
use WebformAjaxElementTrait;
protected function defineDefaultProperties() {
return parent::defineDefaultProperties() + [
'property_a' => 'Three',
'property_b' => 'Three',
'property_c' => '',
];
}
public function preview() {
return [];
}
public function form(array $form, FormStateInterface $form_state) {
$form = parent::form($form, $form_state);
$element_properties = $form_state
->get('element_properties');
$element_properties['property_c'] = date('c');
$form_state
->set('element_properties', $element_properties);
$form['test'] = [
'#type' => 'fieldset',
'#title' => $this
->t('Test'),
];
$form['test']['property_a'] = [
'#type' => 'select',
'#title' => $this
->t('Property A'),
'#description' => $this
->t('Changing this value will update B and C'),
'#options' => [
'One' => $this
->t('One'),
'Two' => $this
->t('Two'),
'Three' => $this
->t('Three'),
],
];
$form['test']['property_b'] = [
'#type' => 'textfield',
'#title' => $this
->t('Property B'),
'#description' => $this
->t('Property C is always equal to Property A.'),
'#attributes' => [
'readonly' => TRUE,
'style' => 'background-color: #eee',
],
];
$form['test']['property_c'] = [
'#type' => 'textfield',
'#title' => $this
->t('Property C'),
'#description' => $this
->t('Property C is always updated to reflect the current timestamp.'),
'#attributes' => [
'readonly' => TRUE,
'style' => 'background-color: #eee',
],
];
$this
->buildAjaxElement('test-element', $form['test'], $form['test']['property_a']);
$form['test']['update']['#limit_validation_errors'] = [
[
'properties',
'property_a',
],
[
'properties',
'property_b',
],
[
'properties',
'property_c',
],
];
return $form;
}
public static function submitAjaxElementCallback(array $form, FormStateInterface $form_state) {
$button = $form_state
->getTriggeringElement();
$element =& NestedArray::getValue($form, array_slice($button['#array_parents'], 0, -1));
NestedArray::setValue($form_state
->getUserInput(), $element['property_b']['#parents'], $element['property_a']['#value']);
$form_state
->setValueForElement($element['property_b'], $element['property_a']['#value']);
$property_c = date('c');
NestedArray::setValue($form_state
->getUserInput(), $element['property_c']['#parents'], $property_c);
$form_state
->setValueForElement($element['property_c'], $property_c);
$form_state
->setRebuild();
}
}