LinkPager::setHeaderToShowing PHP Method

    protected function setHeaderToShowing()
    {
        $page = $this->getCurrentPage() + 1;
        //0 indexed page so add one
        $to = $this->pages->getPageSize() * $page;
        if ($to > $this->getItemCount()) {
            $to = $this->getItemCount();
        }
        $from = $page;
        if ($page > 1) {
            $from = ($page - 1) * $this->pages->getPageSize() + 1;
        }
        $this->header = 'Showing ' . $from . ' to ' . $to . ' of ' . $this->getItemCount();
    }