Replacing page number with other counter in listoftodos

Question

I'm using the todonotes package to add notes in my documents. The \listoftodos command adds a ToC for todos.

Instead of the page numbers in this ToC, I would like to display another value, for example \thesection. The todonotes package manipulates a ToC named .tdo, so I'm guessing I can do that with tocloft but so far I've failed to achieve it.

Here is a MWE:

\documentclass{scrbook}

\usepackage{todonotes}
\usepackage{tocloft}
\usepackage{lipsum}

\begin{document}

\chapter{My first chapter}

\section{A first section}

\lipsum

\todo{This is a note}

\section{Another section}

\lipsum

\todo{This is another note}


\listoftodos


\end{document}

The two notes have page numbers 2 and 3 respectively. I would like them to show 1.1 and 1.2 (section numbers) instead. How can I do that?

Answer 1

Update!!!

The following solution sets the correct width of \@pnumwidth

\documentclass{scrbook}

\usepackage{todonotes}
\usepackage{tocloft}
\usepackage{lipsum}
\usepackage{showframe}
\makeatletter
\def\myaddcontentsline#1#2#3{%
  \addtocontents{#1}{\protect\contentsline{#2}{#3}{see \thesection\ at p. \thepage}}}
\renewcommand{\@todonotes@addElementToListOfTodos}{%
    \if@todonotes@colorinlistoftodos%
        \myaddcontentsline{tdo}{todo}{{%
            \colorbox{\@todonotes@currentbackgroundcolor}%
                {\textcolor{\@todonotes@currentbackgroundcolor}{o}}%
            \ \@todonotes@caption}}%
    \else%
        \myaddcontentsline{tdo}{todo}{{\@todonotes@caption}}%
    \fi}%
\newcommand*\mylistoftodos{%
  \begingroup
       \setbox\@tempboxa\hbox{see 9.9 at p. 99}%
       \renewcommand*\@tocrmarg{\the\wd\@tempboxa}%
       \renewcommand*\@pnumwidth{\the\wd\@tempboxa}%
       \listoftodos%
  \endgroup
}
\makeatother

\begin{document}
\chapter{My first chapter}
\section{A first section}
\lipsum
\todo{This is a note}
\section{Another section}
\lipsum
\todo{This is another note}

\mylistoftodos
\end{document}

The result is:

Answer 2

Since it is the only ToC in my document, I have found that redifining \addcontentsline works fine and is quite straightforward:

 \renewcommand{\addcontentsline}[3]{%
   \addtocontents{#1}{\protect\contentsline{#2}{#3}{\tododate}{section*.\thesection}}
 }

The only side effect I've seen is that it ruins the bookmarks in the PDF. That is OK for my draft (which is why I use todonotes), but not for my final document, so my solution so far is to make a package that wraps up todonotes and passes it the disable option:

\ProvidesPackage{review}
\let\review@disable\@empty
\let\review@dateinlist\@empty
\DeclareOption{disable}{\def\review@disable{true}}
\DeclareOption{dateinlist}{\def\review@dateinlist{true}}
\ProcessOptions


% Put dates instead of page numbers in listoftodos
\newcommand{\tododate}{%
  \thesection~\chaphead
}

\ifx\review@disable \@empty
  \usepackage[french,colorinlistoftodos,textsize=small]{todonotes}
  \ifx\review@dateinlist \@empty
  \else
    \renewcommand{\addcontentsline}[3]{%
      \addtocontents{#1}{\protect\contentsline{#2}{#3}{\tododate}{section*.\thesection}}
    }
  \fi
\else
  \usepackage[french,colorinlistoftodos,textsize=small,disable]{todonotes}
\fi

This way, I can call my package in different ways:

\usepackage{review} % normal style
\usepackage[dateinlist}{review} % date instead of page numbers
\usepackage[disable]{review} % disable todonotes and do not mess up bookmarks