Customize reference in newenvironment

Question

One of my professors in CS have made us use his template to write our master thesis in Software Engineering.

When I use \ref{...} it only appears the number, which is a problem because I have multiple subsystems and each one has their own list (eg. one is SGPA1 and other is SGU1). I've been trying to change it using this question (\ref should use enumerate label name), and it hasn't worked.

Is there any solution so when I use \ref{an item of the environment} it also shows the characters (SGPA in this example)?

\newenvironment{functionalProcesosAutomaticos}
{
    \bgroup
    \renewcommand\baselinestretch{1.3}
  \typeout{Begining enumeration}
  \ifnum
    \@enumdepth >3 \@toodeep
  \else
    \advance\@enumdepth \@ne
    \def\@enumctr{enum\romannumeral\the\@enumdepth}
    \list{\csname label\@enumctr\endcsname}
    {
            \small
      \partopsep=0\myem 
      \topsep=\@listinterlined 
      \itemsep=\@listinterlined 
      \parsep=\@listinterlined 
      \advance\topsep by .3\myem
      \advance\itemsep by .15\myem
      \itemindent=0\myem
      \rightmargin=5\myex
      \leftmargin=8\myex
      \labelsep=1\myex \labelwidth=3\myex
      \usecounter{\@enumctr}
      \renewcommand*{\labelenumi}{\textbf{SGPA\theenumi}}
      \renewcommand*{\theenumii}{\arabic{enumii}}
      \renewcommand*{\labelenumii}{\textbf{SGPA\theenumi.\theenumii.--}}
      \renewcommand*{\theenumiii}{\arabic{enumiii}}
      \renewcommand*{\labelenumiii}{\textbf{SGPA\theenumi.\theenumii.\theenumiii.--}}
    }
  \fi
}
{
                \endlist
        \typeout{Ending enumeration}
        \egroup
}

Answer 1

You adjusted
\theenumi, \theenumii, \theenumiii
and
\labelenumi, \labelenumii, \labelenumiii.

I think you need to also adjust
\p@enumi, \p@enumii, \p@enumiii.

These macros deliver prefix/postfix to \the⟨counter⟩ when \refstepcounter stores cross-referencing-data used by \label as macro \@currentlabel.

I don't know what \myem, \myex and \@listinterlined are, but I assume they are some units/lengths and I defined them on my own, with weird values. ;-)

Does the example deliver the output you desire?

\errorcontextlines=10000
\documentclass{article}
%\usepackage{hyperref}
\makeatletter
\def\myem{em}
\def\myex{ex}
\def@listinterlined{.5\baselineskip}
\newenvironment{functionalProcesosAutomaticos}
{%%%%
    \bgroup
    \renewcommand\baselinestretch{1.3}%%%%%%%%%%%%
  \typeout{Begining enumeration}%%%%%%%%%%%%
  \advance@enumdepth @ne
  \ifnum
    @enumdepth >4 @toodeep
  \else
    \def@enumctr{enum\romannumeral\the@enumdepth}%%%%
    \list{\csname label@enumctr\endcsname}%%%%
    {%%%%
            \small
      \partopsep=0\myem\relax
      \topsep=@listinterlined\relax
      \itemsep=@listinterlined\relax
      \parsep=@listinterlined\relax
      \advance\topsep by .3\myem\relax
      \advance\itemsep by .15\myem\relax
      \itemindent=0\myem\relax
      \rightmargin=5\myex\relax
      \leftmargin=8\myex\relax
      \labelsep=1\myex\relax
      \labelwidth=3\myex\relax
      \usecounter{@enumctr}%
      \renewcommand{\theenumi}{SGPA\arabic{enumi}}%%%%
      \renewcommand{\theenumii}{\theenumi.\arabic{enumii}}%%%%
      \renewcommand{\theenumiii}{\theenumii.\arabic{enumiii}}%%%%
      \renewcommand{\theenumiv}{\theenumiii.\arabic{enumiv}}%%%%
      \renewcommand{\p@enumi}{}%%%%
      \renewcommand{\p@enumii}{}%%%%
      \renewcommand{\p@enumiii}{}%%%%
      \renewcommand{\p@enumiv}{}%%%%
%      \renewcommand{\p@enumii}[1]{##1.--}%%%%
%      \renewcommand{\p@enumiii}[1]{##1.--}%%%%
%      \renewcommand{\p@enumiv}[1]{##1.--}%%%%
      \renewcommand{\labelenumi}{\textbf{\theenumi}}%%%%
      \renewcommand{\labelenumii}{\textbf{\theenumii}}%%%%
      \renewcommand{\labelenumiii}{\textbf{\theenumiii}}%%%%
      \renewcommand{\labelenumiv}{\textbf{\theenumiv}}%%%%
%      \renewcommand{\labelenumii}{\textbf{\theenumii.--}}%%%%
%      \renewcommand{\labelenumiii}{\textbf{\theenumiii.--}}%%%%
%      \renewcommand{\labelenumiv}{\textbf{\theenumiv.--}}%%%%
    }%%%%
  \fi
}{%%%%
        \ifnum
          @enumdepth >4 
        \else
          \expandafter\endlist
        \fi
        \typeout{Ending enumeration}%%%%
        \egroup
}
\makeatother
\begin{document}
\ref{AnotherItem}
\ref{AnotherNestedItem}
\ref{AnotherNestedNestedItem}
\ref{AnotherNestedNestedNestedItem}
\begin{functionalProcesosAutomaticos}
\item An item
\item\label{AnotherItem} Another item
\item Yet another item
\begin{functionalProcesosAutomaticos}
\item A nested item
\item\label{AnotherNestedItem} Another nested item
\item Yet another nested item
\begin{functionalProcesosAutomaticos}
\item A nested nested item
\item\label{AnotherNestedNestedItem} Another nested nested item
\item Yet another nested nested item
\begin{functionalProcesosAutomaticos}
\item A nested nested nested item
\item\label{AnotherNestedNestedNestedItem} Another nested nested nested item
\item Yet another nested nested nested item
%\begin{functionalProcesosAutomaticos}
%\item A nested nested nested nested item
%\item\label{AnotherNestedNestedNestedNestedItem} Another nested nested nested nested item
%\item Yet another nested nested nested nested item
%\end{functionalProcesosAutomaticos}
\end{functionalProcesosAutomaticos}
\end{functionalProcesosAutomaticos}
\end{functionalProcesosAutomaticos}
\end{functionalProcesosAutomaticos}
\end{document}