diff --git a/src/actions/Action.php b/src/actions/Action.php
index d45a274f..cb35f8e9 100644
--- a/src/actions/Action.php
+++ b/src/actions/Action.php
@@ -31,6 +31,7 @@ class Action extends \yii\base\Action
     const EVENT_BEFORE_LOAD = 'beforeLoad';
     const EVENT_BEFORE_PERFORM = 'beforePerform';
     const EVENT_AFTER_PERFORM = 'afterPerform';
+    const EXPECTED_AJAX_RESPONSE_HEADER_NAME = 'X-Expected-Ajax-Response';
 
     /**
      * @var Controller the controller that owns this action
diff --git a/src/actions/RenderSummaryAction.php b/src/actions/RenderSummaryAction.php
deleted file mode 100644
index 09fe08ef..00000000
--- a/src/actions/RenderSummaryAction.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-/**
- * HiPanel core package
- *
- * @link      https://hipanel.com/
- * @package   hipanel-core
- * @license   BSD-3-Clause
- * @copyright Copyright (c) 2014-2019, HiQDev (http://hiqdev.com/)
- */
-
-namespace hipanel\actions;
-
-use Closure;
-
-class RenderSummaryAction extends RenderAction
-{
-    public Closure $summary;
-
-    public function init()
-    {
-        parent::init();
-    }
-
-    public function run()
-    {
-        return call_user_func($this->summary, $this);
-    }
-}
diff --git a/src/actions/VariantsAction.php b/src/actions/VariantsAction.php
new file mode 100644
index 00000000..0097c7a6
--- /dev/null
+++ b/src/actions/VariantsAction.php
@@ -0,0 +1,34 @@
+<?php
+/**
+ * HiPanel core package
+ *
+ * @link      https://hipanel.com/
+ * @package   hipanel-core
+ * @license   BSD-3-Clause
+ * @copyright Copyright (c) 2014-2019, HiQDev (http://hiqdev.com/)
+ */
+
+namespace hipanel\actions;
+
+use Yii;
+
+class VariantsAction extends RenderAction
+{
+    public array $variants;
+
+    public function init()
+    {
+        parent::init();
+    }
+
+    public function run()
+    {
+        $headerName = $this->controller->request->headers->get(self::EXPECTED_AJAX_RESPONSE_HEADER_NAME);
+        foreach ($this->variants as $expected => $variant) {
+            if ($expected === $headerName) {
+                return $variant($this);
+            }
+        }
+        Yii::$app->end();
+    }
+}
diff --git a/src/base/SearchModelTrait.php b/src/base/SearchModelTrait.php
index f79b5d92..f770866d 100644
--- a/src/base/SearchModelTrait.php
+++ b/src/base/SearchModelTrait.php
@@ -12,7 +12,7 @@
 
 use hiqdev\hiart\ActiveQuery;
 use hiqdev\hiart\ActiveRecord;
-use yii\data\ActiveDataProvider;
+use hiqdev\hiart\ActiveDataProvider;
 use yii\helpers\ArrayHelper;
 
 /**
diff --git a/src/widgets/CountEnabler.php b/src/widgets/CountEnabler.php
new file mode 100644
index 00000000..673793a9
--- /dev/null
+++ b/src/widgets/CountEnabler.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace hipanel\widgets;
+
+use hiqdev\hiart\ActiveDataProvider;
+use Yii;
+use yii\base\Widget;
+use yii\grid\GridView;
+
+class CountEnabler extends Widget
+{
+    public ActiveDataProvider $dataProvider;
+
+    public $content;
+
+    public function run()
+    {
+        $this->dataProvider->enableCount();
+        $grid = Yii::createObject([
+            'class' => GridView::class,
+            'dataProvider' => $this->dataProvider,
+        ]);
+
+        return call_user_func($this->content, $grid);
+    }
+}
diff --git a/src/widgets/HookInterface.php b/src/widgets/HookInterface.php
new file mode 100644
index 00000000..0d5e768a
--- /dev/null
+++ b/src/widgets/HookInterface.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace hipanel\widgets;
+
+interface HookInterface
+{
+    public function registerJsHook(string $paramName): void;
+}
diff --git a/src/widgets/HookTrait.php b/src/widgets/HookTrait.php
new file mode 100644
index 00000000..3d5353ab
--- /dev/null
+++ b/src/widgets/HookTrait.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace hipanel\widgets;
+
+use hipanel\actions\Action;
+use yii\web\View;
+
+trait HookTrait
+{
+    public function registerJsHook(string $reqHeaderParamName): void
+    {
+        $id = $this->getId();
+        $headerName = Action::EXPECTED_AJAX_RESPONSE_HEADER_NAME;
+        $this->view->registerJs("$.ajax({
+           type: 'GET',
+           url: document.URL,
+           beforeSend: xhr => {
+             xhr.setRequestHeader('{$headerName}', '{$reqHeaderParamName}');
+           },
+           success: html => {
+             $('#{$id}').html(html);
+           }
+        });", View::POS_LOAD);
+    }
+}
diff --git a/src/widgets/PagerHook.php b/src/widgets/PagerHook.php
new file mode 100644
index 00000000..8887bf32
--- /dev/null
+++ b/src/widgets/PagerHook.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace hipanel\widgets;
+
+use Yii;
+use yii\helpers\Html;
+use yii\widgets\LinkPager;
+
+class PagerHook extends LinkPager implements HookInterface
+{
+    use HookTrait;
+
+    public string $tag = 'div';
+
+    public string $content;
+
+    public function init()
+    {
+        $this->registerJsHook('pager');
+    }
+
+    public function run()
+    {
+        return Html::tag($this->tag, $this->content ?? $this->getLoader(), array_merge(['id' => $this->getId()], $this->options));
+    }
+
+    private function getLoader(): string
+    {
+        return Html::tag('span', null, ['class' => 'fa fa-spinner fa-pulse', 'style' => 'margin-right: .7rem;']) . Yii::t('hipanel', 'loading pager...');
+    }
+}
\ No newline at end of file
diff --git a/src/widgets/SummaryHook.php b/src/widgets/SummaryHook.php
index cb1f6451..07548cc6 100644
--- a/src/widgets/SummaryHook.php
+++ b/src/widgets/SummaryHook.php
@@ -5,10 +5,11 @@
 use Yii;
 use yii\base\Widget;
 use yii\helpers\Html;
-use yii\web\View;
 
-class SummaryHook extends Widget
+class SummaryHook extends Widget implements HookInterface
 {
+    use HookTrait;
+
     public string $tag = 'div';
 
     public array $options = [];
@@ -18,22 +19,16 @@ class SummaryHook extends Widget
     public function init()
     {
         parent::init();
-        $this->registerJs();
+        $this->registerJsHook('summary');
     }
 
     public function run()
     {
-        return Html::tag($this->tag, $this->content ?? $this->getLoader(), array_merge(['id' => $this->getId(), 'class' => 'summary'], $this->options));
-    }
-
-    private function registerJs(): void
-    {
-        $id = $this->getId();
-        $this->view->registerJs("$.get(document.URL, summary => { $('#{$id}').html(summary) });", View::POS_LOAD);
+        return Html::tag($this->tag, $this->content ?? $this->getLoader(), array_merge(['id' => $this->getId()], $this->options));
     }
 
     private function getLoader(): string
     {
-        return Html::tag('span', null, ['class' => 'fa fa-spinner fa-pulse', 'style' => 'margin-right: .7rem;']) . Yii::t('hipanel', 'loading summary...');
+        return Html::tag('span', null, ['class' => 'fa fa-spinner fa-pulse', 'style' => 'margin: .7rem; 0 1rem']) . Yii::t('hipanel', 'loading summary...');
     }
 }
diff --git a/src/widgets/SummaryWidget.php b/src/widgets/SummaryWidget.php
index 80c64089..19e8c86b 100644
--- a/src/widgets/SummaryWidget.php
+++ b/src/widgets/SummaryWidget.php
@@ -31,8 +31,9 @@ public function run()
         $locals = $this->getSumsString($this->local_sums ?? []);
         $totals = $this->getSumsString($this->total_sums ?? []);
 
-        return ($totals !== '' ? Yii::t('hipanel:stock', 'TOTAL: {sum}', ['sum' => $totals]) : null) .
-            ($locals !== '' ? '<br><span class="text-muted">' . Yii::t('hipanel:stock', 'on screen: {sum}', ['sum' => $locals]) . '</span>' : null);
+        return '<div class="summary">' . ($totals !== '' ? Yii::t('hipanel:stock', 'TOTAL: {sum}', ['sum' => $totals]) : null) .
+            ($locals !== '' ? '<br><span class="text-muted">' . Yii::t('hipanel:stock', 'on screen: {sum}', ['sum' => $locals]) . '</span>' : null)
+            . '</div>';
     }
 
     /**