class Range

Same name in other branches
  1. 9 core/lib/Drupal/Core/Render/Element/Range.php \Drupal\Core\Render\Element\Range
  2. 8.9.x core/lib/Drupal/Core/Render/Element/Range.php \Drupal\Core\Render\Element\Range
  3. 11.x 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'] = [
    '#type' => 'range',
    '#title' => $this->t('Quantity'),
];

Attributes

#[FormElement('range')]

Hierarchy

Expanded class hierarchy of Range

See also

\Drupal\Core\Render\Element\Number

5 string references to 'Range'
ContextDefinitionIsSatisfiedTest::providerTestIsSatisfiedBy in core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionIsSatisfiedTest.php
Provides test data for ::testIsSatisfiedBy().
FormTestDisabledElementsForm::buildForm in core/modules/system/tests/modules/form_test/src/Form/FormTestDisabledElementsForm.php
Form constructor.
form_test.routing.yml in core/modules/system/tests/modules/form_test/form_test.routing.yml
core/modules/system/tests/modules/form_test/form_test.routing.yml
form_test.routing.yml in core/modules/system/tests/modules/form_test/form_test.routing.yml
core/modules/system/tests/modules/form_test/form_test.routing.yml
Range::preRenderRange in core/lib/Drupal/Core/Render/Element/Range.php
Prepares a #type 'range' render element for input.html.twig.

File

core/lib/Drupal/Core/Render/Element/Range.php, line 29

Namespace

Drupal\Core\Render\Element
View source 
class Range extends Number {
    
    /**
     * {@inheritdoc}
     */
    public function getInfo() {
        $info = parent::getInfo();
        $class = static::class;
        return [
            '#min' => 0,
            '#max' => 100,
            '#pre_render' => [
                [
                    $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, [
            'id',
            'name',
            'value',
            'step',
            'min',
            'max',
        ]);
        static::setAttributes($element, [
            '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

Title Modifiers Object type Summary Overriden Title Overrides
FormElementBase::processAutocomplete public static function Adds autocomplete functionality to elements. 1
FormElementBase::processPattern public static function #process callback for #pattern form element property. 1
FormElementBase::validatePattern public static function #element_validate callback for #pattern form element property. 1
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'.
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
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 FormElementBase::valueCallback
RenderElementBase::preRenderAjaxForm public static function Adds Ajax information about an element to communicate with JavaScript. 2
RenderElementBase::preRenderGroup public static function Adds members of this group as actual elements for rendering. 2
RenderElementBase::processAjaxForm public static function Form element processing handler for the #ajax form property. 3
RenderElementBase::processGroup public static function Arranges elements into groups. 2
RenderElementBase::setAttributes public static function Sets a form element's class attribute. Overrides ElementInterface::setAttributes 2

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