Re: Unnumbered sections in LaTeX export

From: Carsten Dominik <carsten.dominik@gmail.com>
To: "Thomas S. Dye" <tsd@tsdye.com>
Cc: emacs-orgmode@gnu.org
Subject: Re: Unnumbered sections in LaTeX export
Date: Fri, 18 Sep 2009 18:29:32 +0100	[thread overview]
Message-ID: <B6274A02-DA5B-41C8-93BA-C73770FD651E@gmail.com> (raw)
In-Reply-To: <401F602E-41B3-480B-8097-6A8C7CEF90CF@tsdye.com>

Hi Thomas,

I have not really looks at this problem, but would it help to use
a clever combination of org-export-latex-low-levels and org- 
export=headline-levels?

- Carsten

On Sep 15, 2009, at 11:04 PM, Thomas S. Dye wrote:

>
> On Sep 15, 2009, at 7:42 AM, Sebastian Rose wrote:
>
>> "Thomas S. Dye" <tsd@tsdye.com> writes:
>>
>>> Thanks Sebastian.  I appreciate the expert assistance.  I have a  
>>> simple export
>>> to Beamer working and was trying to implement automatic  export of  
>>> columns, too.
>>> The starred sections were going to be  placeholders for the  
>>> columns heading
>>> level when it wasn't used.  I've  found that skipping a headline  
>>> level in the
>>> source causes the latex  exporter to skip over subsequent inferior  
>>> levels, so it
>>> isn't possible  to assign a heading level to columns and then use  
>>> them or not as
>>> the  case requires.
>>
>> You could try to add a class to `org-export-latex-classes'. For  
>> such a
>> class, you can define a mapping for each headline level:
>>
>>
>> ("my-beamer-class" "\\documentclass...\\usepackage{beamer}"
>>  ("\\chapter{%s}" . "\\my-chapter*{%s}")
>>  ("\\section{%s}" . "\\my-section*{%s}")
>>  ("\\subsection{%s}" . "\\my-subsection*{%s}")
>>  ("\\subsubsection{%s}" . "\\my-subsubsection*{%s}")))
>>
>> I don't know if this is an easy thing to do, since I only did this  
>> once
>> a long time ago.
>> But it seems it's worth a try.
>>
>>
>> See:
>> http://orgmode.org/manual/Sectioning-structure.html#Sectioning-structure
>> http://127.0.0.1/devel/org-notes/org-search.php?speedbar=1&main=/devel/org-notes/org-search.php
>>
>>
>>
>>
>> Sebastian
>
> Yes, that is what I'm playing around with.  I have a useful, but  
> simple export to beamer working.  I've been trying without success  
> to implement beamer's \begin{columns} ... \end{columns}  
> environment.  This is a fairly common construct in beamer that  
> occurs inside some frames but not in others.  It seems natural to  
> put it like this:
>
> ("\\section{%s}" . "\\section{%s}")
> ("\\subsection{%s}" . "\\subsection{%s}")
> ("\\begin{frame}\\frametitle{%s}" "\\end{frame}" "\\begin{frame}\ 
> \frametitle{%s}" "\\end{frame}")
> ("\\begin{columns}\\label{%s}" "\\end{columns}" "\\begin{columns}\ 
> \label{%s}" "\\end{columns}")
>
> where the \label{%s} puts the mandatory use of %s somewhere it won't  
> affect the LaTeX compilation.
>
> The problem with this is that for frames where columns aren't  
> wanted, simply leaving out the fourth level in org means that  
> everything below it won't be exported.
>
> This example results in an empty frame (Item 1 and Item 2 are  
> dropped from the export):
>
> * Section head
> ** Subsection head
> *** Frame title
> ***** Item 1
> ***** Item 2
>
> It seems that a placeholder of some kind is needed if the columns  
> environment isn't wanted.
>
> Initially, I explored using the definition for the unnumbered  
> sections, like this:
>
> ("\\begin{columns}\\label{%s}" "\\end{columns}" "%%\\begin{columns}\ 
> \label{%s}" "%%\\end{columns}")
>
> which would use a LaTeX comment as a placeholder.  This won't work  
> because the switch for numbered/unnumbered sections is set at the  
> file level and not for individual instances.
>
> Then, I thought to define a do-nothing environment in LaTeX
>
> \newenvironment{nocolumns}{}{}
>
> set it up in .emacs like this:
>
> ("\\begin{%s}" "\\end{%s}" "\\begin{%s}" "\\end{%s}")
>
> and then put this in my .org file:
>
> * Section head
> ** Subsection head
> *** Frame title
> **** nocolumns
> ***** Item 1
> ***** Item 2
>
> But this doesn't work because %s doesn't expand in \\end{%s}.  I get  
> \begin{nocolumns} ... \end{%s}, which LaTeX doesn't like.
>
> So, I'm stumped for now, but still pleased to have a simple export  
> from org to beamer working, albeit one that produces frames without  
> columns.
>
> All the best,
> Tom
>
>
>
>
>
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