Magento Admin : How to show custom calculation besides admin grid pager in custom module

Question

In admin, I want to show custom calculations next to pager in custom module's grid.

If there is any a way to do that, please share.

Example :

Answer 1

you will need to change the template of your grid.
By default the grid is rendered with the template app/design/adminhtml/default/default/template/widget/grid.phtml

You need to add this in your grid block __construct method after calling parent::__construct().

$this->setTemplate('your_folder/grid.phtml');  

If the method __construct does not exist, create it and make it look like this:

public function __construct($attributes=array())
{
    parent::__construct($attributes);
    $this->setTemplate('your_folder/grid.phtml'); 
}

then copy the file app/design/adminhtml/default/default/template/widget/grid.phtml to app/design/adminhtml/default/default/template/your_folder/grid.phtml

Now you can do modifications in your new file.
You should insert the code that shows your custom values right after the pager