Move layers configuration.

src/Backend/Renderer/Label/Layer/ReferenceLabelRenderer.php

@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * Leaflet maps for Contao CMS.
+ *
+ * @package    contao-leaflet-maps
+ * @author     David Molineus <david.molineus@netzmacht.de>
+ * @copyright  2016-2017 netzmacht David Molineus. All rights reserved.
+ * @license    LGPL-3.0 https://github.com/netzmacht/contao-leaflet-maps/blob/master/LICENSE
+ * @filesource
+ */
+
+declare(strict_types=1);
+
+namespace Netzmacht\Contao\Leaflet\Backend\Renderer\Label\Layer;
+
+use Netzmacht\Contao\Leaflet\Model\LayerModel;
+use Symfony\Component\Translation\TranslatorInterface as Translator;
+
+/**
+ * Class ReferenceLabelRenderer.
+ *
+ * @package Netzmacht\Contao\Leaflet\Backend\Renderer\Label\Layer
+ */
+final class ReferenceLabelRenderer extends AbstractLabelRenderer
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function getLayerType(): string
+    {
+        return 'vectors';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function render(array $row, string $label, Translator $translator): string
+    {
+        $reference = LayerModel::findByPk($row['reference']);
+
+        if ($reference) {
+            $label .= '<span class="tl_gray"> (' . $reference->title . ')</span>';
+        }
+
+        return $label;
+    }
+}