class Range in Zircon Profile 8

Same name in this branch

8 vendor/symfony/validator/Constraints/Range.php \Symfony\Component\Validator\Constraints\Range
8 core/lib/Drupal/Core/Render/Element/Range.php \Drupal\Core\Render\Element\Range

Same name and namespace in other branches

8.0 core/lib/Drupal/Core/Render/Element/Range.php \Drupal\Core\Render\Element\Range

Provides a slider for input of a number within a specific range.

Provides an HTML5 input element with type of "range".

Properties:

#min: Minimum value (defaults to 0).
#max: Maximum value (defaults to 100).

Refer to \Drupal\Core\Render\Element\Number for additional properties.

Usage example:

$form['quantity'] = array(
  '#type' => 'number',
  '#title' => t('Quantity'),
);

Plugin annotation

@FormElement("range");

Hierarchy

class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
- class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, StringTranslationTrait
  - class \Drupal\Core\Render\Element\RenderElement implements ElementInterface
    class \Drupal\Core\Render\Element\FormElement implements FormElementInterface
    class \Drupal\Core\Render\Element\Number
    class \Drupal\Core\Render\Element\Range

Expanded class hierarchy of Range

File

core/lib/Drupal/Core/Render/Element/Range.php, line 35: Contains \Drupal\Core\Render\Element\Range.

Namespace

Drupal\Core\Render\Element

View source

class Range extends Number {

  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    $info = parent::getInfo();
    $class = get_class($this);
    return array(
      '#min' => 0,
      '#max' => 100,
      '#pre_render' => array(
        array(
          $class,
          'preRenderRange',
        ),
      ),
      '#theme' => 'input__range',
    ) + $info;
  }

  /**
   * Prepares a #type 'range' render element for input.html.twig.
   *
   * @param array $element
   *   An associative array containing the properties of the element.
   *   Properties used: #title, #value, #description, #min, #max, #attributes,
   *   #step.
   *
   * @return array
   *   The $element with prepared variables ready for input.html.twig.
   */
  public static function preRenderRange($element) {
    $element['#attributes']['type'] = 'range';
    Element::setAttributes($element, array(
      'id',
      'name',
      'value',
      'step',
      'min',
      'max',
    ));
    static::setAttributes($element, array(
      'form-range',
    ));
    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public static function valueCallback(&$element, $input, FormStateInterface $form_state) {
    if ($input === '') {
      $offset = ($element['#max'] - $element['#min']) / 2;

      // Round to the step.
      if (strtolower($element['#step']) != 'any') {
        $steps = round($offset / $element['#step']);
        $offset = $element['#step'] * $steps;
      }
      return $element['#min'] + $offset;
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
FormElement::processAutocomplete	public static	function	Adds autocomplete functionality to elements.
FormElement::processPattern	public static	function	#process callback for #pattern form element property.
FormElement::validatePattern	public static	function	#element_validate callback for #pattern form element property.
Number::preRenderNumber	public static	function	Prepares a #type 'number' render element for input.html.twig.
Number::validateNumber	public static	function	Form element validation handler for #type 'number'.
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	2
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.
PluginBase::$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
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::__construct	public	function	Constructs a Drupal\Component\Plugin\PluginBase object.	69
Range::getInfo	public	function	Returns the element properties for this element. Overrides Number::getInfo
Range::preRenderRange	public static	function	Prepares a #type 'range' render element for input.html.twig.
Range::valueCallback	public static	function	Determines how user input is mapped to an element's #value property. Overrides FormElement::valueCallback
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.
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.
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.

You are here