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How can i display my cross sell products blocks under add to cart popup box,

my add to cart block,

<?php



class Cmsmart_AjaxCart_IndexController extends Mage_Core_Controller_Front_Action

{

    public function _constructor(){

        $_SERVER['REQUEST_URI'] = array_pop(explode('web.com', @$_SERVER['HTTP_REFERER']));

    }



    protected function _getCart()

    {

        return Mage::getSingleton('checkout/cart');

    }



    protected function _getSession()

    {

        return Mage::getSingleton('checkout/session');

    }



    protected function _updateShoppingCart()

    {

        try {

            $cartData = $this->getRequest()->getParam('cart');

            if (is_array($cartData)) {

                $filter = new Zend_Filter_LocalizedToNormalized(

                    array('locale' => Mage::app()->getLocale()->getLocaleCode())

                );

                foreach ($cartData as $index => $data) {

                    if (isset($data['qty'])) {

                        $cartData[$index]['qty'] = $filter->filter(trim($data['qty']));

                    }

                }

                $cart = $this->_getCart();

                if (! $cart->getCustomerSession()->getCustomer()->getId() && $cart->getQuote()->getCustomerId()) {

                    $cart->getQuote()->setCustomerId(null);

                }



                $cartData = $cart->suggestItemsQty($cartData);

                $cart->updateItems($cartData)

                    ->save();

            }

            $this->_getSession()->setCartWasUpdated(true);

        } catch (Mage_Core_Exception $e) {

            $this->_getSession()->addError(Mage::helper('core')->escapeHtml($e->getMessage()));

        } catch (Exception $e) {

            $this->_getSession()->addException($e, $this->__('Cannot update shopping cart.'));

            Mage::logException($e);

        }

    }



    public function indexAction(){

        $delete = $this->getRequest()->getParam('delete');

        $kiemtra = true;



        $update = $this->getLayout()->getUpdate();

        $update->addHandle('default');

        $this->addActionLayoutHandles();

        if(!$delete){

            $product = $this->_getProductFromUrl();

            $product = Mage::registry('product');

            $options = $product->getProductOptionsCollection();

            $conf = Mage::getModel('catalog/product_type_configurable')->setProduct($product);

            $col = $conf->getUsedProductCollection()->addAttributeToSelect('*')->addFilterByRequiredOptions();

            //$kiemtra = (!$product->getTypeInstance(true)->hasRequiredOptions($product) || $this->getRequest()->getParam('product') || count($col) == 0);

            //$kiemtra = ($product->getTypeId() == 'simple'  || $this->getRequest()->getParam('product') || $delete) && !$product->getTypeInstance(true)->hasRequiredOptions($product); 

            $kiemtra = $delete || $this->getRequest()->getParam('product') || !$product->getTypeInstance(true)->hasRequiredOptions($product);

            if($kiemtra) {

                self::tryaddAction($product, $_GET);

            }



            Mage::dispatchEvent('catalog_controller_product_view', array('product'=>$product));

            if ($this->getRequest()->getParam('options')) {

                $notice = $product->getTypeInstance(true)->getSpecifyOptionMessage();

                Mage::getSingleton('catalog/session')->addNotice($notice);

            }

            if(@$product) Mage::getSingleton('catalog/session')->setLastViewedProductId($product->getId());



            if(@$product){

                $update->addHandle('PRODUCT_TYPE_'.$product->getTypeId());

                $update->addHandle('PRODUCT_'.$product->getId());

            }

        }else{

            $update->addUpdate('<remove name="product.info"/>');    

            $kiemtra = true;

            if($delete == 'all'){

                 self::_emptyShoppingCart();

            }else{

                if($delete != 'udaj') { $this->removeAction($delete); }else {

                    if(@$_POST['cart']) $this->_updateShoppingCart();

                        //foreach(@$_POST['cart'] as $k => $v){

                    //  $this->udpateAction($k, $v);

                }

            }

        }



        $this->loadLayoutUpdates();

        $this->generateLayoutXml()->generateLayoutBlocks();



        $json_encode = array();

        $json_encode['ajaxcart'] = '';

        $json_encode['ajaxsidebar'] = '';

        $json_encode['ajaxSummaryCount'] = '';

        $json_encode['ajaxCountItem'] = '';

        $json_encode['ajaxcartmsg'] = '';

        $json_encode['ajaxcontinue'] = '';



        if($kiemtra) {

        // Show the message add to cart is success          

        if(@$product) $json_encode['ajaxcontinue'] = '

        <div>

            <ul class="messages ajaxcart-messages">

                <li class="success-msg">

                    <ul>

                        <li><span><a title="'.@$product->getName().'" href="'.@$product->getProductUrl().'">'.@$product->getName().' </a> '.$this->__('has been added to cart').'.</span></li>













                        <li><button onclick="setLocation(''.Mage::getBaseUrl().'checkout/')" class="button btn-continue" title="'.$this->__('Checkout').'" type="button"><span><span>'.$this->__('Checkout').'</span></span></button>

                    </ul>

                </li>

            </ul>

        </div>';



        //<button class="button btn-continue closemsg" title="Continue Shopping" type="button"><span><span>Continue Shopping</span></span></button>

            //<button onclick="setLocation(''.Mage::getBaseUrl().'checkout/onepage/')" class="button btn-continue" title="'.$this->__('Proceed to Checkout').'" type="button"><span><span>'.$this->__('Proceed to Checkout').'</span></span></button>



        // Drop Down Cart Block 

            $block = $this->getLayout()->createBlock('checkout/cart_sidebar')->setBlockId('block-id-in-magento')->setTemplate('checkout/cart/sidebar.phtml');

            //$this->getLayout()->getBlock('content')->append($block);

            $count = Mage::helper('checkout/cart')->getSummaryCount();

            if ($count == 1) {

                $text = $this->__('My Cart (%s item)', $count);

            } elseif ($count > 0) {

                $text = $this->__('My Cart (%s items)', $count);

            } else {

                $text = $this->__('My Cart');

            }

            $json_encode['ajaxCountItem'] = $count;

            $json_encode['ajaxSummaryCount'] = $text;

            $json_encode['ajaxsidebar'] = str_replace('class="block block-cart"', 'id="cart-ajax-sidebar"', @$block->toHtml());



            $block2 = $this->getLayout()->createBlock('checkout/cart_sidebar')

                ->setTemplate('cmsmart/ajaxcart/view/sidebar.phtml')

                ->addItemRender('simple', 'checkout/cart_item_renderer', 'cmsmart/ajaxcart/view/sidebar/default.phtml')

                ->addItemRender('grouped', 'checkout/cart_item_renderer', 'cmsmart/ajaxcart/view/sidebar/default.phtml')

                ->addItemRender('configurable', 'checkout/cart_item_renderer', 'cmsmart/ajaxcart/view/sidebar/default.phtml');



            $json_encode['ajaxcart'] = @$block2->toHtml();



        }else{

            $json_encode['ajaxcartmsg'] = $this->getLayout()->getBlock('content')->toHtml();

        }

        echo json_encode($json_encode);

    }



    private function tryaddAction($product, $params = array()){     



        $cart = Mage::getModel("checkout/cart");                            

        $cart->addProduct($product->getId(), $params);                          

        return $cart->save();

    }



    private function udpateAction($itemId, $qty){

        $qty = (int)$qty?(int)$qty:1;

        $cartHelper = Mage::getSingleton('checkout/cart');

        $cartHelper->updateItem($itemId, $qty);

        //$items = $cartHelper->getCart()->getItems();

//      foreach ($items as $item) {

//          if ($item->getId() == $itemId) {

//              $item->setQty($qty);

//          }

//      }

        $cartHelper->save(); 

        Mage::getSingleton('checkout/session')->setCartWasUpdated(true);                

    }



    private function removeAction($itemId){

        try{

            $cartHelper = Mage::helper('checkout/cart');

            $cartHelper->getCart()->removeItem($itemId)->save();

        }catch (Mage_Core_Exception $exception) {}

    }



    private function emptyAction(){

        $cartHelper = Mage::helper('checkout/cart');

        $items = $cartHelper->getCart()->getItems();

        foreach ($items as $item) {

            $cartHelper->getCart()->removeItem($item->getItemId());

        }

        $cartHelper->getCart()->save();               

    }



    protected function _emptyShoppingCart()

    {

        try {

            $this->_getCart()->truncate()->save();

            $this->_getSession()->setCartWasUpdated(true);

        } catch (Mage_Core_Exception $exception) {

            $this->_getSession()->addError($exception->getMessage());

        } catch (Exception $exception) {

            $this->_getSession()->addException($exception, $this->__('Cannot update shopping cart.'));

        }

    }



    public function _getProductFromUrl(){

        Mage::dispatchEvent('catalog_controller_product_init_before', array('controller_action'=>$this));

        $product_id = $this->getRequest()->getParam('product');

        if(!$product_id):

            $path  = $this->getRequest()->getParam('id');

            $product_id = (int) $path;



            if(!$product_id){



                $path[0] == "/" ? $path = substr($path, 1, strlen($path)) : $path;

                $tableName = Mage::getSingleton('core/resource')->getTableName('core_url_rewrite'); 

                $write = Mage::getSingleton('core/resource')->getConnection('core_write');



                $rs = $write->query('select `product_id` from `'.$tableName.'` where `request_path` = "'.$path.'"');



                if ($row = $rs->fetch() ) {

                    $product_id = $row['product_id'];

                }   

            }

        endif;  



        if (!$product_id) {

            return false;

        }



        $product = Mage::getModel('catalog/product')

            ->setStoreId(Mage::app()->getStore()->getId())

            ->load($product_id);



        if (!Mage::helper('catalog/product')->canShow($product)) {

            return false;

        }

        if (!in_array(Mage::app()->getStore()->getWebsiteId(), $product->getWebsiteIds())) {

            return false;

        }



        $category = null;

        if ($categoryId) {

            $category = Mage::getModel('catalog/category')->load($categoryId);

            $product->setCategory($category);

            Mage::register('current_category', $category);

        }

        elseif ($categoryId = Mage::getSingleton('catalog/session')->getLastVisitedCategoryId()) {

            if ($product->canBeShowInCategory($categoryId)) {

                $category = Mage::getModel('catalog/category')->load($categoryId);

                $product->setCategory($category);

                Mage::register('current_category', $category);

            }

        }

        Mage::register('current_product', $product);

        Mage::register('product', $product);



        try {

            Mage::dispatchEvent('catalog_controller_product_init', array('product'=>$product));

            Mage::dispatchEvent('catalog_controller_product_init_after', array('product'=>$product, 'controller_action' => $this));

        } catch (Mage_Core_Exception $e) {

            Mage::logException($e);

            return false;

        }



        return $product;

    }





}

my cross sell products block,

template path :

appdesignfrontenddefaulttheme-nametemplatecheckoutcart

<?php

/**

 * Magento

 *

 * NOTICE OF LICENSE

 *

 * This source file is subject to the Academic Free License (AFL 3.0)

 * that is bundled with this package in the file LICENSE_AFL.txt.

 * It is also available through the world-wide-web at this URL:

 * http://opensource.org/licenses/afl-3.0.php

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@magentocommerce.com so we can send you a copy immediately.

 *

 * DISCLAIMER

 *

 * Do not edit or add to this file if you wish to upgrade Magento to newer

 * versions in the future. If you wish to customize Magento for your

 * needs please refer to http://www.magentocommerce.com for more information.

 *

 * @category    design

 * @package     base_default

 * @copyright   Copyright (c) 2013 Magento Inc. (http://www.magentocommerce.com)

 * @license     http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)

 */

?>

<?php

/**

 * Cart cross sell items template

 *

 * @see Mage_Checkout_Block_Cart_Crosssell

 */

?>

<?php if($this->getItemCount()): ?>

<div class="crosssell">

    <h2><?php echo $this->__('Based on your selection, you may be interested in the following items:') ?></h2>

    <ul id="crosssell-products-list">

    <?php foreach ($this->getItems() as $_item): ?>

        <li class="item">

            <a class="product-image" href="<?php echo $_item->getProductUrl() ?>" title="<?php echo $this->escapeHtml($_item->getName()) ?>"><img src="<?php echo $this->helper('catalog/image')->init($_item, 'thumbnail')->resize(110); ?>" alt="<?php echo $this->escapeHtml($_item->getName()) ?>" /></a>

            <div class="product-details">

                <h3 class="product-name"><a href="<?php echo $_item->getProductUrl() ?>"><?php echo $this->escapeHtml($_item->getName()) ?></a></h3>

                <?php echo $this->getPriceHtml($_item, true) ?>

                <button type="button" title="<?php echo $this->__('Add to Cart') ?>" class="button btn-cart" onclick="setLocation('<?php echo $this->getAddToCartUrl($_item) ?>')"><span><span><?php echo $this->__('Add to Cart') ?></span></span></button>

                <ul class="add-to-links">

                    <?php if ($this->helper('wishlist')->isAllow()) : ?>

                        <li><a href="<?php echo $this->getAddToWishlistUrl($_item) ?>" class="link-wishlist"><?php echo $this->__('Add to Wishlist') ?></a></li>

                    <?php endif; ?>

                    <?php if($_compareUrl=$this->getAddToCompareUrl($_item)): ?>

                        <li><span class="separator">|</span> <a href="<?php echo $_compareUrl ?>" class="link-compare"><?php echo $this->__('Add to Compare') ?></a></li>

                    <?php endif; ?>

                </ul>

            </div>

        </li>

    <?php endforeach; ?>

    </ul>

    <script type="text/javascript">decorateList('crosssell-products-list', 'none-recursive')</script>

</div>

<?php endif; ?>





<?php echo $this->getLayout()->createBlock('checkout/cart_crosssell')->setTemplate('checkout/cart/crosssell.phtml')->toHtml();?>

magento default path :

appdesignfrontendbasedefaulttemplatecheckoutcart

<?php

/**

 * Magento

 *

 * NOTICE OF LICENSE

 *

 * This source file is subject to the Academic Free License (AFL 3.0)

 * that is bundled with this package in the file LICENSE_AFL.txt.

 * It is also available through the world-wide-web at this URL:

 * http://opensource.org/licenses/afl-3.0.php

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@magento.com so we can send you a copy immediately.

 *

 * DISCLAIMER

 *

 * Do not edit or add to this file if you wish to upgrade Magento to newer

 * versions in the future. If you wish to customize Magento for your

 * needs please refer to http://www.magento.com for more information.

 *

 * @category    design

 * @package     base_default

 * @copyright   Copyright (c) 2006-2016 X.commerce, Inc. and affiliates (http://www.magento.com)

 * @license     http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)

 */

?>

<?php

/**

 * Cart cross sell items template

 *

 * @see Mage_Checkout_Block_Cart_Crosssell

 */

?>

<?php if($this->getItemCount()): ?>

<div class="crosssell">

    <h2><?php echo $this->__('Based on your selection, you may be interested in the following items:') ?></h2>

    <ul id="crosssell-products-list">

    <?php foreach ($this->getItems() as $_item): ?>

        <li class="item">

            <a class="product-image" href="<?php echo $_item->getProductUrl() ?>" title="<?php echo $this->escapeHtml($_item->getName()) ?>"><img src="<?php echo $this->helper('catalog/image')->init($_item, 'thumbnail')->resize(75); ?>" width="75" height="75" alt="<?php echo $this->escapeHtml($_item->getName()) ?>" /></a>

            <div class="product-details">

                <h3 class="product-name"><a href="<?php echo $_item->getProductUrl() ?>"><?php echo $this->escapeHtml($_item->getName()) ?></a></h3>

                <?php echo $this->getPriceHtml($_item, true) ?>

                <button type="button" title="<?php echo Mage::helper('core')->quoteEscape($this->__('Add to Cart')) ?>" class="button btn-cart" onclick="setLocation('<?php echo $this->getAddToCartUrl($_item) ?>')"><span><span><?php echo $this->__('Add to Cart') ?></span></span></button>

                <ul class="add-to-links">

                    <?php if ($this->helper('wishlist')->isAllow()) : ?>

                        <li><a href="<?php echo $this->getAddToWishlistUrl($_item) ?>" class="link-wishlist"><?php echo $this->__('Add to Wishlist') ?></a></li>

                    <?php endif; ?>

                    <?php if($_compareUrl=$this->getAddToCompareUrl($_item)): ?>

                        <li><span class="separator">|</span> <a href="<?php echo $_compareUrl ?>" class="link-compare"><?php echo $this->__('Add to Compare') ?></a></li>

                    <?php endif; ?>

                </ul>

            </div>

        </li>

    <?php endforeach; ?>

    </ul>

    <script type="text/javascript">decorateList('crosssell-products-list', 'none-recursive')</script>

</div>

<?php endif; ?>

Hi You can do that by adding crosssell block html in you ajax response in your controller ajax action.

$this->loadLayout();

$block = $this->getLayout()->createBlock('checkout/cart_crosssell')->setTemplate('checkout/cart/crosssell.phtml');

$response['crosssell'] = $block->toHtml();

$this->getResponse()->setBody(Mage::helper('core')->jsonEncode($response));

Now you can access this response crosssell block html in Ajax success block and can add it in popup html.

I Hope this will be helpful to you.

Write this code in popup area file and you

{{block type="checkout/cart_crosssell" name="checkout.cart.crosssell" as="crosssell" template="checkout/cart/crosssell.phtml"}}

Means call crosssell.phtml file in popup window.
And this is the code for it.

<?php echo $this->getLayout()->createBlock('checkout/cart_crosssell')->setTemplate('checkout/cart/crosssell.phtml')->toHtml();?>

And design it as per you need.