class Weight

Same name and namespace in other branches
  1. 9 core/lib/Drupal/Core/Render/Element/Weight.php \Drupal\Core\Render\Element\Weight
  2. 8.9.x core/lib/Drupal/Core/Render/Element/Weight.php \Drupal\Core\Render\Element\Weight
  3. 10 core/lib/Drupal/Core/Render/Element/Weight.php \Drupal\Core\Render\Element\Weight

Provides a form element for input of a weight.

Weights are integers used to indicate ordering, with larger numbers later in the order.

Properties:

  • #delta: The range of possible weight values used. A delta of 10 would indicate possible weight values between -10 and 10.

Usage example:

$form['weight'] = [
  '#type' => 'weight',
  '#title' => $this->t('Weight'),
  '#default_value' => $edit['weight'],
  '#delta' => 10,
];

Attributes

#[FormElement('weight')]

Hierarchy

Expanded class hierarchy of Weight

1 file declares its use of Weight
WeightTest.php in core/tests/Drupal/KernelTests/Core/Render/Element/WeightTest.php
178 string references to 'Weight'
block.schema.yml in core/modules/block/config/schema/block.schema.yml
core/modules/block/config/schema/block.schema.yml
block.schema.yml in core/modules/block/config/schema/block.schema.yml
core/modules/block/config/schema/block.schema.yml
BlockCreationTrait::placeBlock in core/modules/block/tests/src/Traits/BlockCreationTrait.php
Creates a block instance based on default settings.
BlockDependenciesTest::createBlock in core/modules/views/tests/src/Kernel/Plugin/BlockDependenciesTest.php
Creates a block instance based on default settings.
BlockForm::form in core/modules/block/src/BlockForm.php
Gets the actual form array to be built.

... See full list

File

core/lib/Drupal/Core/Render/Element/Weight.php, line 28

Namespace

Drupal\Core\Render\Element
View on git.drupalcode.org
View source 
class Weight extends FormElementBase {
  
  /**
   * {@inheritdoc}
   */
  public function getInfo() {
    return [
      '#input' => TRUE,
      '#delta' => 10,
      '#default_value' => 0,
      '#process' => [
        [
          static::class,
          'processWeight',
        ],
        [
          static::class,
          'processAjaxForm',
        ],
      ],
    ];
  }
  
  /**
   * Expands a weight element into a select/number element.
   */
  public static function processWeight(&$element, FormStateInterface $form_state, &$complete_form) {
    // If the number of options is small enough, use a select field. Otherwise,
    // use a number field.
    $type = $element['#delta'] <= \Drupal::config('system.site')->get('weight_select_max') ? 'select' : 'number';
    $element = array_merge($element, \Drupal::service('element_info')->getInfo($type));
    $element['#is_weight'] = TRUE;
    if ($type === 'select') {
      $weights = [];
      for ($n = -1 * $element['#delta']; $n <= $element['#delta']; $n++) {
        $weights[$n] = $n;
      }
      $default_value = (int) $element['#default_value'];
      if (!isset($weights[$default_value])) {
        $weights[$default_value] = $default_value;
        ksort($weights);
      }
      $element['#options'] = $weights;
    }
    else {
      // Use a field big enough to fit most weights.
      $element['#size'] = 10;
    }
    return $element;
  }

}

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 Render API callback: Handles the #pattern form element property. 1
FormElementBase::validatePattern public static function Render API callback: Handles the #pattern form element property.. 1
FormElementBase::valueCallback public static function Determines how user input is mapped to an element&#039;s #value property. Overrides FormElementInterface::valueCallback 17
PluginInspectionInterface::getPluginDefinition public function Gets the definition of the plugin implementation. 7
PluginInspectionInterface::getPluginId public function Gets the plugin ID of the plugin instance. 3
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&#039;s class attribute. Overrides ElementInterface::setAttributes 2
Weight::getInfo public function Returns the element properties for this element. Overrides ElementInterface::getInfo
Weight::processWeight public static function Expands a weight element into a select/number element.

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