ControlElementBase.php in Geolocation Field 8.2        
                          
                  
                        
  
  
  
  
File
  modules/geolocation_google_maps/src/Plugin/geolocation/MapFeature/ControlElementBase.php
  
    View source  
  <?php
namespace Drupal\geolocation_google_maps\Plugin\geolocation\MapFeature;
use Drupal\Core\Form\FormStateInterface;
use Drupal\geolocation\MapFeatureBase;
use Drupal\geolocation_google_maps\Plugin\geolocation\MapProvider\GoogleMaps;
abstract class ControlElementBase extends MapFeatureBase {
  
  public static function getDefaultSettings() {
    return [
      'position' => 'TOP_LEFT',
    ];
  }
  
  public function getSettingsForm(array $settings, array $parents) {
    $form = parent::getSettingsForm($settings, $parents);
    $settings = array_replace_recursive(self::getDefaultSettings(), $settings);
    $form['position'] = [
      '#type' => 'select',
      '#title' => $this
        ->t('Position'),
      '#options' => GoogleMaps::getControlPositions(),
      '#default_value' => $settings['position'],
    ];
    return $form;
  }
  
  public function validateSettingsForm(array $values, FormStateInterface $form_state, array $parents) {
    if (!in_array($values['position'], array_keys(GoogleMaps::getControlPositions()))) {
      $form_state
        ->setErrorByName(implode('][', $parents), $this
        ->t('No valid position.'));
    }
  }
}