X-Cart forums - Changes Product Format

I'm trying to increase the allowed decimal places for displayed product prices to four.
Following the developer documentation, I have tried decorating AView and modifying the function formatPrice(). I have also tried decorating Math and modifying the $precision values. Both attempts have been unsuccessful, and did not effect the default business logic in any way.

Code:

<?php

// vim: set ts=4 sw=4 sts=4 et:



namespace Developer\FormatDisplayPrice\View;



/**

 * Abstract widget

 */

abstract class AView extends \XLite\View\AView implements \XLite\Base\IDecorator 

{

    /**

     * Format price

     *

     * @param float                 $value        Price

     * @param \XLite\Model\Currency $currency     Currency OPTIONAL

     * @param boolean               $strictFormat Flag if the price format is strict (trailing zeroes and so on options)

     *

     * @return string

     */

    public static function formatPrice($value, \XLite\Model\Currency $currency = null, $strictFormat = false)

    {

        if (null === $currency) {

            $currency = \XLite::getInstance()->getCurrency();

        }



        if ($currency->getRoundUp() !== \XLite\Model\Currency::ROUNDUP_NONE && !\XLite::isAdminZone()) {

            $pow   = pow(10, (int) $currency->getRoundUp());

            $value = ceil($value * $pow) / $pow;

        }



        $parts = $currency->formatParts($value);



        if (isset($parts['sign']) && '-' === $parts['sign']) {

            $parts['sign'] = '− ';

        }



        if ($strictFormat) {

            $parts = static::formatPartsStrictly($parts);

        }



        /*

         * initial test

         * return unformatted prices

         */

        return $value;

    }

}

Do these classes need to be decorated in a different manner?
Am I decorating the correct classes and/or functions for this problem?

Any help or guidance is appreciated.