Replace options_callback with event listener

Author: discordier

contao/dca/tl_metamodel.php

@@ -565,10 +565,6 @@
                         'label'     => &$GLOBALS['TL_LANG']['tl_metamodel']['languages_langcode'],
                         'exclude'   => true,
                         'inputType' => 'select',
-                        'options'   => array_flip(array_filter(array_flip($this->getLanguages()), function ($langCode) {
-                            // Disable >2 char long language codes for the moment.
-                            return (strlen($langCode) == 2);
-                        })),
                         'eval'      => array
                         (
                             'style'  => 'width:470px',

src/MetaModels/DcGeneral/Events/Table/MetaModels/Subscriber.php

@@ -21,6 +21,7 @@
 
 namespace MetaModels\DcGeneral\Events\Table\MetaModels;
 
+use Contao\System;
 use ContaoCommunityAlliance\DcGeneral\Contao\View\Contao2BackendView\Event\DecodePropertyValueForWidgetEvent;
 use ContaoCommunityAlliance\DcGeneral\Contao\View\Contao2BackendView\Event\EncodePropertyValueFromWidgetEvent;
 use ContaoCommunityAlliance\DcGeneral\Contao\View\Contao2BackendView\Event\GetBreadcrumbEvent;
@@ -31,6 +32,7 @@
 use ContaoCommunityAlliance\DcGeneral\Event\PostPersistModelEvent;
 use ContaoCommunityAlliance\DcGeneral\Event\PreDeleteModelEvent;
 use ContaoCommunityAlliance\UrlBuilder\UrlBuilder;
+use MenAtWork\MultiColumnWizard\Event\GetOptionsEvent;
 use MetaModels\DcGeneral\Events\BaseSubscriber;
 use MetaModels\DcGeneral\Events\BreadCrumb\BreadCrumbMetaModels;
 use MetaModels\Helper\TableManipulation;
@@ -79,6 +81,10 @@ function (GetBreadcrumbEvent $event) use ($serviceContainer) {
                 PreDeleteModelEvent::NAME,
                 array($this, 'handleDelete')
             )
+            ->addListener(
+                GetOptionsEvent::NAME,
+                array($this, 'loadLanguageOptions')
+            )
             ->addListener(
                 DecodePropertyValueForWidgetEvent::NAME,
                 array($this, 'fixLanguageLangArray')
@@ -240,6 +246,28 @@ public function unfixLangArray(EncodePropertyValueFromWidgetEvent $event)
         $event->setValue($output);
     }
 
+    /**
+     * Prepare the language options.
+     *
+     * @param GetOptionsEvent $event The event.
+     *
+     * @return void
+     */
+    public function loadLanguageOptions(GetOptionsEvent $event)
+    {
+        if (($event->getModel()->getProviderName() !== 'tl_metamodel')
+            || ($event->getPropertyName() !== 'languages')
+            || ($event->getSubPropertyName() !== 'langcode')
+            || $event->getOptions() !== []) {
+            return;
+        }
+
+        $event->setOptions(array_flip(array_filter(array_flip(System::getLanguages()), function ($langCode) {
+            // Disable >2 char long language codes for the moment.
+            return (strlen($langCode) == 2);
+        })));
+    }
+
     /**
      * Decode a language array.
      *