YamlFormSignature.php in YAML Form 8

Namespace

Drupal\yamlform\Element

File

src/Element/YamlFormSignature.php

<?php

namespace Drupal\yamlform\Element;

use Drupal\Core\Render\Element\FormElement;
use Drupal\Core\Render\Element;

/**
 * Provides a form element for entering a signature.
 *
 * @FormElement("yamlform_signature")
 */
class YamlFormSignature extends FormElement {

  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    $class = get_class($this);
    return [
      '#input' => TRUE,
      '#process' => [
        [
          $class,
          'processAjaxForm',
        ],
        [
          $class,
          'processGroup',
        ],
      ],
      '#pre_render' => [
        [
          $class,
          'preRenderYamlFormSignature',
        ],
      ],
      '#theme' => 'input__yamlform_signature',
      '#theme_wrappers' => [
        'form_element',
      ],
    ];
  }

  /**
   * Prepares a #type 'yamlform_signature' render element for input.html.twig.
   *
   * @param array $element
   *   An associative array containing the properties of the element.
   *   Properties used: #title, #value, #description, #min, #max, #attributes,
   *   #step.
   *
   * @return array
   *   The $element with prepared variables ready for input.html.twig.
   */
  public static function preRenderYamlFormSignature($element) {
    $element['#attributes']['type'] = 'hidden';
    Element::setAttributes($element, [
      'name',
      'value',
    ]);
    static::setAttributes($element, [
      'js-yamlform-signature',
      'form-yamlform-signature',
    ]);
    $build = [
      '#prefix' => '<div class="js-yamlform-signature-pad yamlform-signature-pad">',
      '#suffix' => '</div>',
    ];
    $build['reset'] = [
      '#type' => 'button',
      '#value' => t('Reset'),
    ];
    $build['canvas'] = [
      '#type' => 'html_tag',
      '#tag' => 'canvas',
    ];
    $element['#children'] = $build;
    $element['#attached']['library'][] = 'yamlform/yamlform.element.signature';
    return $element;
  }

}

Classes

Name	Description
YamlFormSignature	Provides a form element for entering a signature.