Magento observer is not viewing product details - php

Question

I have created custom checkout_cart_save_before observer in magento by create the following files
app/etc/modules/Cart_Override.xml
<?xml version="1.0"?>
<config>
<modules>
<Cart_Override>
<codePool>local</codePool>
<active>true</active>
<depends>
<Mage_Contacts />
</depends>
</Cart_Override>
</modules>
</config>
app/code/local/Cart/Override/etc/config.xml
<?xml version="1.0"?>
<config>
<global>
<models>
<cartoverride>
<class>Cart_Override_Model</class>
</cartoverride>
</models>
<events>
<checkout_cart_save_before>
<observers>
<cart_override_qty_observer>
<type>singleton</type>
<class>Cart_Override_Model_Qtyc_Observer</class>
<method>checkout_cart_save_before</method>
</cart_override_qty_observer>
</observers>
</checkout_cart_save_before>
</events>
</global>
</config>
and app/code/local/Cart/Override/Model/Qtyc/Observer.php
class Cart_Override_Model_Qtyc_Observer extends Varien_Event_Observer
{
public function checkout_cart_save_before($observer)
{
$action = Mage::app()->getFrontController()->getAction();
$product = $observer->getProduct();
echo "<pre>";
print_r($product);
echo "</pre>";
die();
}
}
The observer is working fine, when i click the add to cart button it is going to checkout_cart_save_before function. But i could not get the product values from the observer using the following code inside the checkout_cart_save_before function
$product = $observer->getProduct();
I have to add something for get the product details from the observer parameter?....any guess??

Answer 1

Have a look at Mage_Checkout_Model_Cart::save() where the event is dispatched:
Mage::dispatchEvent('checkout_cart_save_before', array('cart'=>$this));
You can access the cart data with $cart = $observer->getEvent()->getCart(); and the quote items with $cart->getItems().