Affichage d'une thumbnail dans la grille

Ui/Component/Listing/Column/Thumbnail.php

+<?php
+namespace NicolasBejean\ContentManager\Ui\Component\Listing\Column;
+
+use Magento\Framework\UrlInterface;
+use Magento\Framework\View\Element\UiComponent\ContextInterface;
+use Magento\Framework\View\Element\UiComponentFactory;
+use Magento\Store\Model\StoreManagerInterface;
+use Magento\Ui\Component\Listing\Columns\Column;
+
+class Thumbnail extends Column
+{
+    const NAME = 'thumbnail';
+
+    const ALT_FIELD = 'name';
+
+    /**
+     * @var UrlInterface
+     */
+    protected $urlBuilder;
+
+    /**
+     * @var StoreManagerInterface
+     */
+    private $storeManager;
+
+    /**
+     * Thumbnail constructor.
+     *
+     * @param ContextInterface $context
+     * @param UiComponentFactory $uiComponentFactory
+     * @param UrlInterface $urlBuilder
+     * @param StoreManagerInterface $storeManager
+     * @param array $components
+     * @param array $data
+     */
+    public function __construct(
+        ContextInterface $context,
+        UiComponentFactory $uiComponentFactory,
+        UrlInterface $urlBuilder,
+        StoreManagerInterface $storeManager,
+        array $components = [],
+        array $data = []
+    ) {
+        $this->urlBuilder = $urlBuilder;
+        $this->storeManager = $storeManager;
+
+        parent::__construct($context, $uiComponentFactory, $components, $data);
+    }
+
+    public function prepareDataSource(array $dataSource)
+    {
+        if(isset($dataSource['data']['items'])) {
+            /* Récupère le nom de la colonne concerné */
+            $fieldName = $this->getData('name');
+            foreach($dataSource['data']['items'] as & $item) {
+                $url = '';
+                if($item[$fieldName] != '') {
+                    $url = $item['image_path'];
+                }
+                $item[$fieldName . '_src'] = $url;
+                $item[$fieldName . '_alt'] = $item['image_alt'] ?: '';
+                $item[$fieldName . '_link'] = $this->urlBuilder->getUrl(
+                    'nicolasbejeancontentmanager/contentmanager/edit',
+                    ['entity_id' => $item['entity_id']]
+                );
+                $item[$fieldName . '_orig_src'] = $url;
+            }
+        }
+
+        return $dataSource;
+    }
+}

view/adminhtml/ui_component/contentmanager_contentmanager_listing.xml

@@ -162,10 +162,11 @@
                 <label translate="true">Identifier</label>
             </settings>
         </column>
-        <column name="image_path" sortOrder="10">
+        <column name="image_path" sortOrder="10" component="Magento_Ui/js/grid/columns/thumbnail" class="NicolasBejean\ContentManager\Ui\Component\Listing\Column\Thumbnail">
             <settings>
-                <filter>text</filter>
-                <label translate="true">Image Path</label>
+                <label translate="true">Thumbnail</label>
+                <hasPreview>1</hasPreview>
+                <sortable>false</sortable>
             </settings>
         </column>
         <column name="image_alt" sortOrder="10">