Index: draggableviews.module
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- draggableviews.module	(date 1468653379000)
+++ draggableviews.module	(revision )
@@ -21,7 +21,7 @@
     ),
     'filter' => array(
       'help' => t('Filter by the draggableviews weight value (Native handler only).'),
-      'id' => 'numeric',
+      'id' => 'draggableviews_filter',
     ),
   );
   $data['draggableviews_structure']['parent'] = array(
Index: src/Plugin/views/filter/DraggableViewsFilter.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/Plugin/views/filter/DraggableViewsFilter.php	(revision )
+++ src/Plugin/views/filter/DraggableViewsFilter.php	(revision )
@@ -0,0 +1,41 @@
+<?php
+
+namespace Drupal\draggableviews\Plugin\views\filter;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\views\Plugin\views\filter\FilterPluginBase;
+use Drupal\views\Views;
+
+/**
+ * Class DraggableViewsFilter
+ * @package Drupal\draggableviews\Plugin\views\filter
+ *
+ * @ingroup views_filter_handlers
+ *
+ * @ViewsFilter("draggableviews_filter")
+ */
+class DraggableViewsFilter extends FilterPluginBase {
+
+  function valueForm(&$form, FormStateInterface $form_state) {
+    $views = Views::getEnabledViews();
+    $draggableviews = [];
+    foreach ($views as $view) {
+      $config = \Drupal::config('views.view.' . $view->id());
+      $rawData = $config->getRawData();
+      if (array_key_exists('draggableviews', $rawData['display']['default']['display_options']['fields'])) {
+        $draggableviews[$view->id()] = $view->label();
+      }
+    }
+
+    $form['value'] = array(
+      '#type' => 'select',
+      '#title' => $this->t('Source view'),
+      '#options' => $draggableviews
+    );
+  }
+
+  function query() {
+    $this->ensureMyTable();
+    $this->query->addWhere($this->options['group'], 'view_name', $this->value);
+  }
+}
\ No newline at end of file