Field Widget API

Define Field API widget types.

Field API widgets specify how fields are displayed in edit forms. Fields of a given field type may be edited using more than one widget. In this case, the Field UI module allows the site builder to choose which widget to use.

Widgets are Plugins managed by the \Drupal\Core\Field\WidgetPluginManager class. A widget is a plugin attributed with class \Drupal\Core\Field\Attribute\FieldWidget that implements \Drupal\Core\Field\WidgetInterface (in most cases, by subclassing \Drupal\Core\Field\WidgetBase). Widget plugins need to be in the namespace \Drupal\{your_module}\Plugin\Field\FieldWidget.

Widgets are Form API elements with additional processing capabilities. The methods of the WidgetInterface object are typically called by respective methods in the \Drupal\Core\Entity\Entity\EntityFormDisplay class.

See also

field

Field Types API

Field Formatter API

Plugin API

Parent topics

Hooks
Define functions that alter the behavior of Drupal core.

File

core/modules/field/field.api.php, line 153

Functions

Title File name Summary
hook_field_widget_complete_form_alter core/modules/field/field.api.php Alter the complete form for field widgets provided by other modules.
hook_field_widget_complete_WIDGET_TYPE_form_alter core/modules/field/field.api.php Alter the complete form for a specific widget provided by other modules.
hook_field_widget_info_alter core/modules/field/field.api.php Perform alterations on Field API widget types.
hook_field_widget_single_element_form_alter core/modules/field/field.api.php Alter forms for field widgets provided by other modules.
hook_field_widget_single_element_WIDGET_TYPE_form_alter core/modules/field/field.api.php Alter widget forms for a specific widget provided by another module.

Classes

Title File name Summary
FieldWidget core/lib/Drupal/Core/Field/Annotation/FieldWidget.php Defines a FieldWidget annotation object.
FieldWidget core/lib/Drupal/Core/Field/Attribute/FieldWidget.php Defines a FieldWidget attribute for plugin discovery.
WidgetBase core/lib/Drupal/Core/Field/WidgetBase.php Base class for 'Field widget' plugin implementations.
WidgetPluginManager core/lib/Drupal/Core/Field/WidgetPluginManager.php Plugin type manager for field widgets.

Interfaces

Title File name Summary
WidgetInterface core/lib/Drupal/Core/Field/WidgetInterface.php Interface definition for field widget plugins.