[Tex/LaTex] How to hyperlink item when enumerating, i.e. the text in the links are not manually encoded

#enumeratehyperref

How do you hyperlink items without manually encoding the text of the hyperlink?

Suppose I want to number some items

\begin{enumerate}
\item blah
\item blah blah
\item blah blah blah

and I want each number to be a hyperlink. Say Item 1, Item 2, Item 3.

I tried

\begin{enumerate}[\hyperlink{Item 1}{Item 1}]

like I would normally do when not hyperlinking; it didn't work.

EDIT: What I really want to do is to label some questions with Q.1, Q.2, Q.3, …
and have these hyperlinked to answers A.1, A.2, A.3, …, respectively. Is there a way for the items to be hyperlinked automatically and still be itemized automatically? I.e. the closer I got to the is to get every item hyperlinked but every item has the same number, e.g. Q.1, Q.1, …

Best Answer

You wrote in a later comment: "For instance I want to make a list of questions which are linked to some answers". This can be achieved with the usual \label-\ref device and the optional argument to \item.

In the example below the answers are in the default enumerate environment. However, questions use the references to the answers instead of the default labels. Hyperref makes them clickable (try this!)

\documentclass{article}
\usepackage{hyperref}
\pagestyle{empty}
\begin{document}
Questions
\begin{enumerate}
\item[\ref{item:earth}.] What is the diameter of Earth?
\item[\ref{item:dwarfs}.] How many dwarfs were there in
  \emph{Sleeping Beauty?}
\end{enumerate}

\bigskip

Answers
\begin{enumerate}
\item 6400\,km\label{item:earth}
\item Seven\label{item:dwarfs}
\end{enumerate}

\end{document}

enter image description here

[For extra credit: find all the errors in the answers]

Related Solutions

[Tex/LaTex] How to add hyperlinks to enumerate items

I am not sure I understood well your problem but here is what I got:

You want to get hyperlinks from the number of the items pointing to some given destination elsewhere in the presentation (set via \hypertarget{label}{text}).
You want the numbers to be automatically displayed for the items.
(I have added this feature but I don't know if you are interested in it) You want to get the numbers of the items to be X.Y where Y is the Yth item of the current list and X is the Xth list you have in your document.

This led me to this MWE

\documentclass{beamer}

\newcounter{totenum}
\setcounter{totenum}{0}
\let\Oldenumerate\enumerate
\def\enumerate{\refstepcounter{totenum}\Oldenumerate}
\newcommand{\myitem}[1]{\refstepcounter{enumi}\item[\hyperlink{#1}{\arabic{totenum}.\arabic{enumi}}]}

\begin{document}
   \begin{frame}
      \begin{enumerate}
         \myitem{destination1} text 1
         \myitem{destination2} text 2
      \end{enumerate}

      \begin{enumerate}
         \myitem{destination3} text 3
         \myitem{destination4} text 4
      \end{enumerate}
   \end{frame}

   \begin{frame}
      \hypertarget{destination1}{The first item is pointing here.}
    \end{frame}

\end{document}

For this output (only the first frame):

Output

Numbering Lists – How to Count the Number of Items in Enumerate When Nesting and [Resume]

You need to postpone \setcounter{beginitems}{\arabic{enumi}} to after the enumerate environment was initiated, so essentially after \begin{enumerate} or \begin{enumerate}[resume] respectively. You need to take into account that \begin{environment} may have one optional argument.

I am not totally sure, but I think, using \LetLtxMacro instead of a plain \let and \renewcommand instead of \def is a bit more secure here:

\documentclass{article}
\usepackage{enumitem}

\makeatletter
\newcounter{totalitems}
\newcounter{beginitems}
\newcounter{enditems}

\usepackage{letltxmacro}
\LetLtxMacro{\@numerate}{\enumerate}
\LetLtxMacro{\end@numerate}{\endenumerate}

\renewcommand{\enumerate}[1][]{%
    \@numerate[#1]%
    \setcounter{beginitems}{\arabic{enumi}}
}
\renewcommand{\endenumerate}{
    \end@numerate%
    \setcounter{enditems}{\arabic{enumi}}
    \setcounter{totalitems}{\numexpr \c@enditems - \c@beginitems \relax}
}
\makeatother

\begin{document}

    \begin{enumerate}
        \item one
        \item two
    \end{enumerate}
    total = \thetotalitems, begin = \thebeginitems, end = \theenditems

    \begin{enumerate}[resume]
        \item three
        \begin{enumerate}
            \item a nested enumerate
        \end{enumerate}
    \end{enumerate}
    total = \thetotalitems, begin = \thebeginitems, end = \theenditems

    \begin{enumerate}
        \item one 
        \item two 
    \end{enumerate}
    total = \thetotalitems, begin = \thebeginitems, end = \theenditems
    
\end{document}

Now, you still may have the problem that the counters are affected every time, an enumerate environment starts, which may cause wrong results when enumerate environments are nested. I did not test this thouroughly.

Best Answer

Related Solutions

[Tex/LaTex] How to add hyperlinks to enumerate items

Numbering Lists – How to Count the Number of Items in Enumerate When Nesting and [Resume]

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