General ⇒ Trying to creating a new environment with its own list

[jonysatie]

Hi Everyone, how are you.

I'm trying to make since two days a new environment it order to include explicit
examples in a document. The problem is that I would like to make a list of all these environments that I have included and the result is a chaotic horizontal list.
I'm sure that you can help me. Again.
Please could you tell me what's wrong and how can I fix it?
Thank you very much.

PD: I have attached the .tex (compiling on latex->ps->pdf is required)

[localghost]

The addition of an example to your LoL should take place outside the shaded environment. Moreover it seems that the \par command need to be added to ech line. Modify your declaration as follows.

Code: Select all

\newenvironment{ejemplo}[1]{%
  \refstepcounter{ejem}
  \begin{shaded}
    \textbf{Ejemplo. \theejem. #1}\par
}{%
  \end{shaded}
  \addcontentsline{lol}{ejemplo}{\protect\numberline{\theejem} #1\par}
}

I didn't test it so there's no guarantee.


Best regards
Thorsten

[jonysatie]

Thanks but I think that I have now 9 errors. So there's some kind of mistake in this code. This time I'm very lost with the solution of my problem. I would thank any help.

PD: I include de new example (with logalghost's modification)

[gmedina]

Hi,

the problem comes from this:

...
\newenvironment{ejemplo}[1]{%
\refstepcounter{ejem}
\begin{shaded}
\textbf{Ejemplo. \theejem. #1}\par
}{%
\end{shaded}
\addcontentsline{lol}{ejemplo}{\protect\numberline{\theejem} #1\par}
}...

no parameters can be used explicitly in the ending part of the definition of a new environment. In some time (when I take a look at the code you posted) I can give you some possible solution.

[jonysatie]

Ohh thanks .. So I will be waiting for your post.
There's a few helpfull Tips here: http://www.golatex.de/newenvironment-t3238.html

[gmedina]

Hi again,

the following code can be used as a starting point to obtain what you desire:

Code: Select all

\documentclass[12pt]{memoir}
\usepackage{xcolor}
\usepackage{amsmath}

\definecolor{shadecolor}{gray}{0.9} 
\newcounter{ejem}
\numberwithin{ejem}{section}

\makeatletter
  \newcommand\l@ejemplo{\@dottedtocline{1}{2em}{3em}}
\makeatother

\newlistof{listofexamples}{lol}{Lista de Ejemplos}

\newenvironment{ejemplo}[1]{%
  \refstepcounter{ejem}
  \begin{shaded}
    \addcontentsline{lol}{ejemplo}{\protect\numberline{\theejem} #1}
    \textbf{Ejemplo \theejem. #1}\par}
  {\end{shaded}}

\begin{document}
\listofexamples

\chapter{veamos}

\section{lalalala}

\begin{ejemplo}{mosh}
  Hola me llamo Jonathan y soy feliz adem\'as de entusiasta.
\end{ejemplo}

\subsection{Veamos de nuevo}

\begin{ejemplo}{mish}
  Hola me llamo Jonathan y soy feliz adem\'as de entusiasta y contento.
\end{ejemplo}

\section{lalalala}

\begin{ejemplo}{lin}
  Hola me llamo Jonathan y soy feliz.
\end{ejemplo}

\begin{ejemplo}{hallo}
  Hola me llamo Jonathan y soy m\'as feliz a\'un.
\label{ejem:jojo}
\end{ejemplo}

Ver ejemplo \ref{ejem:jojo}

\end{document}

Please, feel free to adapt my example according to your needs.

[jonysatie]

Ohh that's indeed what I was searching for.
Could you explain just a little what this commands mean.

Code: Select all

\makeatletter
  \newcommand\l@ejemplo{\@dottedtocline{1}{2em}{3em}}
\makeatother

And thank you. This solved the problem.
Bye

[gmedina]

...
Could you explain just a little what this commands means.

Code: Select all

\makeatletter
  \newcommand\l@ejemplo{\@dottedtocline{1}{2em}{3em}}
\makeatother

Of course. The \l@ejemplo command does the actual typesetting of the entries in the newly defined LoL (List of Examples); in my example code I used the \@dottedtocline command to control the entries layout.

The \@dottedtocline command has the following syntax:

Code: Select all

\@dottedtocline{level}{indent}{numwidth}{text}{page}

The meaning of the five parameters is the following:

level: the nesting level of the entry.
indent: the total indentation from the left margin.
numwidth: the width of the box that contains the number.
text: the text to be used following the number of the entry.
page: the page number in the document in which the entry will actually appear.

In my example I used only the first three parameters, since the other two will be picked automatically when using the \addcontentsline command.

The \makeatletter and \makeatother commands make possible to use the special character @ in the definition or redefinition of new commands or environments.

...
And thank you. This solved the problem.
Bye

You are welcome!