class Item in Drupal 8

Provides a display-only form element with an optional title and description.

Note: since this is a read-only field, setting the #required property will do nothing except theme the form element to look as if it were actually required (i.e. by placing a red star next to the #title).

Plugin annotation

@FormElement("item");

Hierarchy

• class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
  • class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
    • class \Drupal\Core\Render\Element\RenderElement implements ElementInterface
      • class \Drupal\Core\Render\Element\FormElement implements FormElementInterface
        • class \Drupal\Core\Render\Element\Item

2 string references to 'Item'

config_test.schema.yml in core/modules/config/tests/config_test/config/schema/config_test.schema.yml

core/modules/config/tests/config_test/config/schema/config_test.schema.yml

update_test.schema.yml in core/modules/update/tests/modules/update_test/config/schema/update_test.schema.yml

core/modules/update/tests/modules/update_test/config/schema/update_test.schema.yml

44 #type uses of Item

AddFormBase::buildEntityFormElement in core/modules/media_library/src/Form/AddFormBase.php

Builds the sub-form for setting required fields on a new media item.

AddHandler::buildForm in core/modules/views_ui/src/Form/Ajax/AddHandler.php

Form constructor.

AjaxTestImageEffect::ajaxCallback in core/modules/image/tests/modules/image_module_test/src/Plugin/ImageEffect/AjaxTestImageEffect.php

AJAX callback.

AjaxTestImageEffect::buildConfigurationForm in core/modules/image/tests/modules/image_module_test/src/Plugin/ImageEffect/AjaxTestImageEffect.php

Form constructor.

ArgumentPluginBase::buildOptionsForm in core/modules/views/src/Plugin/views/argument/ArgumentPluginBase.php

Provide a form to edit options for this plugin.

... See full list

File

core/lib/Drupal/Core/Render/Element/Item.php, line 14

Namespace

Drupal\Core\Render\Element

class Item extends FormElement {

  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    return [
      // Forms that show author fields to both anonymous and authenticated users
      // need to dynamically switch between #type 'textfield' and #type 'item'
      // to automatically take over the authenticated user's information.
      // Therefore, we allow #type 'item' to receive input, which is internally
      // assigned by Form API based on the #default_value or #value properties.
      '#input' => TRUE,
      '#markup' => '',
      '#theme_wrappers' => [
        'form_element',
      ],
    ];
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
FormElement::processAutocomplete	public static	function	Adds autocomplete functionality to elements.
FormElement::processPattern	public static	function	#process callback for #pattern form element property.
FormElement::validatePattern	public static	function	#element_validate callback for #pattern form element property.
FormElement::valueCallback	public static	function	Determines how user input is mapped to an element's #value property. Overrides FormElementInterface::valueCallback	15
Item::getInfo	public	function	Returns the element properties for this element. Overrides ElementInterface::getInfo
MessengerTrait::$messenger	protected	property	The messenger.	29
MessengerTrait::messenger	public	function	Gets the messenger.	29
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	3
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginBase::__construct	public	function	Constructs a \Drupal\Component\Plugin\PluginBase object.	92
RenderElement::preRenderAjaxForm	public static	function	Adds Ajax information about an element to communicate with JavaScript.
RenderElement::preRenderGroup	public static	function	Adds members of this group as actual elements for rendering.
RenderElement::processAjaxForm	public static	function	Form element processing handler for the #ajax form property.	1
RenderElement::processGroup	public static	function	Arranges elements into groups.
RenderElement::setAttributes	public static	function	Sets a form element's class attribute. Overrides ElementInterface::setAttributes
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	1
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.