TextWidget.php in Examples for Developers 3.x
File
modules/field_example/src/Plugin/Field/FieldWidget/TextWidget.php
View source
<?php
namespace Drupal\field_example\Plugin\Field\FieldWidget;
use Drupal\Component\Utility\Color;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\WidgetBase;
use Drupal\Core\Form\FormStateInterface;
class TextWidget extends WidgetBase {
public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
$value = isset($items[$delta]->value) ? $items[$delta]->value : '';
$element += [
'#type' => 'textfield',
'#default_value' => $value,
'#size' => 7,
'#maxlength' => 7,
'#element_validate' => [
[
$this,
'validate',
],
],
];
return [
'value' => $element,
];
}
public function validate($element, FormStateInterface $form_state) {
$value = $element['#value'];
if (strlen($value) === 0) {
$form_state
->setValueForElement($element, '');
return;
}
if (!Color::validateHex($value)) {
$form_state
->setError($element, $this
->t('Color must be a 3- or 6-digit hexadecimal value, suitable for CSS.'));
}
}
}
Classes
Name |
Description |
TextWidget |
Plugin implementation of the 'field_example_text' widget. |