Fix the icon toggling.

src/Bundle/Resources/contao/config/config.php

@@ -43,6 +43,7 @@ array_insert(
                 ),
                 'icon'       => 'bundles/netzmachtcontaoleaflet/img/layers.png',
                 'stylesheet' => 'bundles/netzmachtcontaoleaflet/css/backend.css',
+                'javascript' => 'bundles/netzmachtcontaoleaflet/js/backend.js'
             ),
             'leaflet_about' => array
             (

src/Bundle/Resources/contao/dca/tl_leaflet_layer.php

@@ -111,7 +111,8 @@ $GLOBALS['TL_DCA']['tl_leaflet_layer'] = [
             'toggle'  => [
                 'label'           => &$GLOBALS['TL_LANG']['tl_leaflet_layer']['toggle'],
                 'icon'            => 'visible.gif',
-                'attributes'      => 'onclick="Backend.getScrollOffset();return AjaxRequest.toggleVisibility(this,%s)"',
+                'attributes'      => 'onclick="Backend.getScrollOffset(); 
+                    return ContaoLeafletAjaxRequest.toggleVisibility(this,%s)"',
                 'button_callback' => [
                     'netzmacht.contao_toolkit.dca.listeners.state_button_callback',
                     'handleButtonCallback',

src/Bundle/Resources/public/js/backend.js

@@ -0,0 +1,64 @@
+/**
+ * Contao Open Source CMS
+ *
+ * Copyright (c) 2005-2017 Leo Feyer
+ *
+ * @license LGPL-3.0+
+ */
+
+
+/**
+ * Provide methods to handle Ajax requests.
+ *
+ * @author Leo Feyer <https://github.com/leofeyer>
+ */
+var ContaoLeafletAjaxRequest = {
+    /**
+     * Toggle the visibility of an element
+     *
+     * @param {object} el    The DOM element
+     * @param {string} id    The ID of the target element
+     * @param {string} table The table name
+     *
+     * @returns {boolean}
+     */
+    toggleVisibility: function (el, id, table) {
+        el.blur();
+
+        var img = null,
+            image = $(el).getFirst('img'),
+            published = (image.get('data-state') == 1),
+            div = el.getParent('div'),
+            index, next, icon, icond, pa;
+            img = div.getParent('li').getFirst('.tl_left img.list-icon');
+
+        // Change the icon
+        if (img !== null && img.nodeName.toLowerCase() == 'img') {
+            icon = img.get('data-icon');
+            icond = img.get('data-icon-disabled');
+
+            img.src = !published ? icon : icond;
+        }
+
+        // Send request
+        if (!published) {
+            image.src = AjaxRequest.themePath + 'icons/visible.svg';
+            image.set('data-state', 1);
+            new Request.Contao({'url': window.location.href, 'followRedirects': false}).get({
+                'tid': id,
+                'state': 1,
+                'rt': Contao.request_token
+            });
+        } else {
+            image.src = AjaxRequest.themePath + 'icons/invisible.svg';
+            image.set('data-state', 0);
+            new Request.Contao({'url': window.location.href, 'followRedirects': false}).get({
+                'tid': id,
+                'state': 0,
+                'rt': Contao.request_token
+            });
+        }
+
+        return false;
+    }
+};

src/Listener/Dca/LayerDcaListener.php

@@ -168,12 +168,22 @@ class LayerDcaListener extends AbstractListener
             $src = 'iconPLAIN.gif';
         }
 
+        $activeIcon   = $src;
+        $disabledIcon = preg_replace('/(\.[^\.]+)$/', '_1$1', $src);
+
         if (!$row['active']) {
-            $src = preg_replace('/(\.[^\.]+)$/', '_1$1', $src);
+            $src = $disabledIcon;
         }
 
-        $alt   = $this->getFormatter()->formatValue('type', $row['type']);
+        $alt        = $this->getFormatter()->formatValue('type', $row['type']);
-        $icon  = Image::getHtml($src, $alt, sprintf('title="%s"', StringUtil::specialchars(strip_tags($alt))));
+        $attributes = sprintf(
+            'class="list-icon" title="%s" data-icon="%s" data-icon-disabled="%s"',
+            StringUtil::specialchars(strip_tags($alt)),
+            $activeIcon,
+            $disabledIcon
+        );
+
+        $icon  = Image::getHtml($src, $alt, $attributes);
         $label = $this->labelRenderer->render($row, $label, $this->translator);
 
         return $icon . ' ' . $label;