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<?php |
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namespace Drupal\entity_browser\Plugin\EntityBrowser\WidgetSelector; |
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use Drupal\entity_browser\WidgetSelectorBase; |
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use Drupal\Core\Form\FormStateInterface; |
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/** |
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* Displays widgets in a select list. |
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* |
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* @EntityBrowserWidgetSelector( |
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* id = "drop_down", |
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* label = @Translation("Drop down widget"), |
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* description = @Translation("Displays the widgets in a drop down.") |
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* ) |
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*/ |
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class DropDown extends WidgetSelectorBase { |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getForm(array &$form = [], FormStateInterface &$form_state = NULL) { |
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// Set a wrapper container for us to replace the form on ajax call. |
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$form['#prefix'] = '<div id="entity-browser-form">'; |
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$form['#suffix'] = '</div>'; |
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/** @var \Drupal\entity_browser\EntityBrowserInterface $browser */ |
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$browser = $form_state->getFormObject()->getEntityBrowser(); |
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$widget_ids = []; |
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foreach ($this->widget_ids as $widget_id => $widget_name) { |
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if ($browser->getWidget($widget_id)->access()->isAllowed()) { |
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$widget_ids[$widget_id] = $widget_name; |
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} |
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} |
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$element['widget'] = [ |
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'#type' => 'select', |
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'#options' => $widget_ids, |
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'#default_value' => $this->getDefaultWidget(), |
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'#executes_submit_callback' => TRUE, |
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'#limit_validation_errors' => [['widget']], |
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// #limit_validation_errors only takes effect if #submit is present. |
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'#submit' => [], |
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'#ajax' => [ |
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'callback' => [$this, 'changeWidgetCallback'], |
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'wrapper' => 'entity-browser-form', |
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], |
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]; |
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$element['change'] = [ |
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'#type' => 'submit', |
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'#name' => 'change', |
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'#value' => $this->t('Change'), |
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'#attributes' => ['class' => ['js-hide']], |
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]; |
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return $element; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function submit(array &$form, FormStateInterface $form_state) { |
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return $form_state->getValue('widget'); |
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} |
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/** |
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* AJAX callback to refresh form. |
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* |
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* @param array $form |
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* Form. |
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* @param FormStateInterface $form_state |
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* Form state object. |
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* |
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* @return array |
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* Form element to replace. |
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*/ |
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public function changeWidgetCallback(array &$form, FormStateInterface $form_state) { |
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return $form; |
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} |
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} |
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drupal-media /
entity_browser
Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArrayis initialized the first time when the foreach loop is entered. You can also see that the value of thebarkey is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.