class Radio
Same name in other branches
- 8.9.x core/lib/Drupal/Core/Render/Element/Radio.php \Drupal\Core\Render\Element\Radio
- 10 core/lib/Drupal/Core/Render/Element/Radio.php \Drupal\Core\Render\Element\Radio
- 11.x core/lib/Drupal/Core/Render/Element/Radio.php \Drupal\Core\Render\Element\Radio
Provides a form element for a single radio button.
This is an internal element that is primarily used to render the radios form element. Refer to \Drupal\Core\Render\Element\Radios for more documentation.
Plugin annotation
@FormElement("radio");
Hierarchy
- class \Drupal\Component\Plugin\PluginBase implements \Drupal\Component\Plugin\PluginInspectionInterface, \Drupal\Component\Plugin\DerivativeInspectionInterface
- class \Drupal\Core\Plugin\PluginBase extends \Drupal\Component\Plugin\PluginBase uses \Drupal\Core\StringTranslation\StringTranslationTrait, \Drupal\Core\DependencyInjection\DependencySerializationTrait, \Drupal\Core\Messenger\MessengerTrait
- class \Drupal\Core\Render\Element\RenderElement extends \Drupal\Core\Plugin\PluginBase implements \Drupal\Core\Render\Element\ElementInterface
- class \Drupal\Core\Render\Element\FormElement extends \Drupal\Core\Render\Element\RenderElement implements \Drupal\Core\Render\Element\FormElementInterface
- class \Drupal\Core\Render\Element\Radio extends \Drupal\Core\Render\Element\FormElement
- class \Drupal\Core\Render\Element\FormElement extends \Drupal\Core\Render\Element\RenderElement implements \Drupal\Core\Render\Element\FormElementInterface
- class \Drupal\Core\Render\Element\RenderElement extends \Drupal\Core\Plugin\PluginBase implements \Drupal\Core\Render\Element\ElementInterface
- class \Drupal\Core\Plugin\PluginBase extends \Drupal\Component\Plugin\PluginBase uses \Drupal\Core\StringTranslation\StringTranslationTrait, \Drupal\Core\DependencyInjection\DependencySerializationTrait, \Drupal\Core\Messenger\MessengerTrait
Expanded class hierarchy of Radio
See also
\Drupal\Core\Render\Element\Radios
\Drupal\Core\Render\Element\Checkbox
9 string references to 'Radio'
- claro_preprocess_input in core/
themes/ claro/ claro.theme - Implements template_preprocess_HOOK() for input.
- ContentTranslationHandler::addTranslatabilityClue in core/
modules/ content_translation/ src/ ContentTranslationHandler.php - Adds a clue about the form element translatability.
- ElementTest::testOptions in core/
modules/ system/ tests/ src/ Functional/ Form/ ElementTest.php - Tests expansion of #options for #type checkboxes and radios.
- FormElementsRenderTest::testDrupalRenderFormElements in core/
modules/ system/ tests/ src/ Kernel/ Common/ FormElementsRenderTest.php - Tests rendering form elements without using doBuildForm().
- FormTestDisabledElementsForm::buildForm in core/
modules/ system/ tests/ modules/ form_test/ src/ Form/ FormTestDisabledElementsForm.php - Form constructor.
7 #type uses of Radio
- ArgumentPluginBase::processContainerRadios in core/
modules/ views/ src/ Plugin/ views/ argument/ ArgumentPluginBase.php - Custom form radios process function.
- FormElementsRenderTest::testDrupalRenderFormElements in core/
modules/ system/ tests/ src/ Kernel/ Common/ FormElementsRenderTest.php - Tests rendering form elements without using doBuildForm().
- LanguageListBuilder::buildRow in core/
modules/ language/ src/ LanguageListBuilder.php - Builds a row for an entity in the entity listing.
- Radios::processRadios in core/
lib/ Drupal/ Core/ Render/ Element/ Radios.php - Expands a radios element into individual radio elements.
- Table::buildOptionsForm in core/
modules/ views/ src/ Plugin/ views/ style/ Table.php - Render the given style.
File
-
core/
lib/ Drupal/ Core/ Render/ Element/ Radio.php, line 18
Namespace
Drupal\Core\Render\ElementView source
class Radio extends FormElement {
/**
* {@inheritdoc}
*/
public function getInfo() {
$class = static::class;
return [
'#input' => TRUE,
'#default_value' => NULL,
'#process' => [
[
$class,
'processAjaxForm',
],
],
'#pre_render' => [
[
$class,
'preRenderRadio',
],
],
'#theme' => 'input__radio',
'#theme_wrappers' => [
'form_element',
],
'#title_display' => 'after',
];
}
/**
* Prepares a #type 'radio' render element for input.html.twig.
*
* @param array $element
* An associative array containing the properties of the element.
* Properties used: #required, #return_value, #value, #attributes, #title,
* #description. The #name property will be sanitized before output. This is
* currently done by initializing Drupal\Core\Template\Attribute with all
* the attributes.
*
* @return array
* The $element with prepared variables ready for input.html.twig.
*/
public static function preRenderRadio($element) {
$element['#attributes']['type'] = 'radio';
Element::setAttributes($element, [
'id',
'name',
'#return_value' => 'value',
]);
// To avoid auto-casting during '==' we convert $element['#value'] and
// $element['#return_value'] to strings. It will prevent wrong true-checking
// for both cases: 0 == 'string' and 'string' == 0, this will occur because
// all numeric array values will be integers and all submitted values will
// be strings. Array values are never valid for radios and are skipped. To
// account for FALSE and empty string values in the #return_value, we will
// consider any #value that evaluates to empty to be the same as any
// #return_value that evaluates to empty.
if (isset($element['#return_value']) && $element['#value'] !== FALSE && !is_array($element['#value']) && (empty($element['#value']) && empty($element['#return_value']) || (string) $element['#value'] === (string) $element['#return_value'])) {
$element['#attributes']['checked'] = 'checked';
}
static::setAttributes($element, [
'form-radio',
]);
return $element;
}
}
Members
Title Sort descending | Modifiers | Object type | Summary | Overriden Title | Overrides |
---|---|---|---|---|---|
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 | 16 |
PluginInspectionInterface::getPluginDefinition | public | function | Gets the definition of the plugin implementation. | 6 | |
PluginInspectionInterface::getPluginId | public | function | Gets the plugin_id of the plugin instance. | 2 | |
Radio::getInfo | public | function | Returns the element properties for this element. | Overrides ElementInterface::getInfo | |
Radio::preRenderRadio | public static | function | Prepares a #type 'radio' render element for input.html.twig. | ||
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 |
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