How to add new button to order view in Magento admin panel?

Question

How to add custom button to order view page near \"Back\" and \"Edit\"?

Answer 1

If you want to do it quick-and-dirty (i.e. editing core files), open app/code/core/Mage/Adminhtml/Block/Sales/Order/View.php and add something like:

    $this->_addButton('order_reorder', array(
        'label'     => Mage::helper('sales')->__('Print Labels'),
        'onclick'   => 'window.open(\'/printouts/' . $this->getOrder()->getRealOrderId() . '.pdf\')',
    ));

You can place that before this block:

    if ($this->_isAllowedAction('emails') && !$order->isCanceled()) {
        $message = Mage::helper('sales')->__('Are you sure you want to send order email to customer?');
        $this->addButton('send_notification', array(
            'label'     => Mage::helper('sales')->__('Send Email'),
            'onclick'   => "confirmSetLocation('{$message}', '{$this->getEmailUrl()}')",
        ));
    }

Your challenge, should you choose to accept is to create a file in local that is an over-ride of the core file, and to post it here!