Field widget
Let’s now create that default license plate widget plugin we referenced in the annotation of the field type, which belongs in the Plugin/Field/FieldWidget namespace of our module:
namespace Drupal\license_plate\Plugin\Field\FieldWidget;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Core\Field\WidgetBase;
/**
* Plugin implementation of the
'default_license_plate_widget' widget.
*
* @FieldWidget(
* id = "default_license_plate_widget",
* label = @Translation("Default license plate widget"),
* field_types = {
* "license_plate"
* }
* )
*/
class DefaultLicensePlateWidget extends WidgetBase {
use StringTranslationTrait;
}
Again, we start by examining the annotation and class parents for just a bit. You will notice nothing particularly complicated, except maybe the field_types...
