Suvayu Ali <fatkasuvayu+linux <at> gmail.com> writes:
> Look a bit more carefully ;). The following paragraph has an example
> suggesting the onlyenv environment. As far as I understand,
> environments are prefered over commands with arguments or macros when
> translating headlines. You can nest your block in such an environment.
> I realise this is a little less flexible than \only{}, but it seems to
> work. I have not tried any of this personally in a long time though.
Indeed, this does the job. Thanks for the extra pointer.
For future readers, now I have this in my .emacs:
(add-to-list 'org-beamer-environments-extra
'("onlyenv" "O" "\\begin{onlyenv}%a" "\\end{onlyenv}"))
And then I can export:
** Frame (beamer_act, not quite right)
*** The problem on this frame
I want Block 1 and Block 2 to occupy the same space on successive
slides.
*** OnlyEnv 1
:B_onlyenv:
:PROPERTIES:
:BEAMER_env: onlyenv
:BEAMER_ACT: <1>
:END:
**** Block 1
Text
*** OnlyEnv 2
:B_onlyenv:
:PROPERTIES:
:BEAMER_env: onlyenv
:BEAMER_ACT: <2>
:END:
**** Block 2
Text 2
-->
\begin{frame}[label=sec-1-1]{Frame (beamer$_{\text{act}}$, not quite right)}
\begin{block}{The problem on this frame}
I want Block 1 and Block 2 to occupy the same space on successive slides.
\end{block}
\begin{onlyenv}<1>
\begin{block}{Block 1}
Text
\end{block}
\end{onlyenv}
\begin{onlyenv}<2>
\begin{block}{Block 2}
Text 2
\end{block}
\end{onlyenv}
\end{frame}
~~~
I think I overlooked this in the manual because the overlay section is not
organized around (what I think are) the most important user questions:
- Which overlays does org beamer export support?
- How to use them?
Instead, "onlyenv" appears in a paragraph whose topic sentence is "You can
add your own environments by..." In other words, the information is "there,"
but organized in a way that would make your middle school English teacher
break out the red pen.
I'll add a TODO for myself to rewrite this section. I don't know when I can
get to it, though.
~~~
Why is onlyenv not supported out of the box?
hjh
