Re: [ANN] Beamer back-end for org-export in contrib/

[suvayu ali <fatkasuvayu+linux@gmail.com>]

Hi Nicolas,

On Sat, Jun 30, 2012 at 4:59 PM, Nicolas Goaziou <n.goaziou@gmail.com> wrote:
> Hello,
>

[...]

> - Headlines become frames when their level is equal to
>  `org-e-beamer-frame-level' (or "H" value in the OPTIONS line).
>  Though, if an headline in the current tree has a "BEAMER_env" (see
>  below) property set to "frame", its level overrides the variable.

The sectioning works wonderfully!

[...]

> On top of buffer keywords supported by `e-latex' back-end (see
> `org-e-latex-options-alist'), this back-end introduces the following
> keywords: "BEAMER_THEME", "BEAMER_COLOR_THEME", "BEAMER_FONT_THEME",
> "BEAMER_INNER_THEME" and "BEAMER_OUTER_THEME".  All accept options in
> square brackets.
>

I tried a few of these out, works very well.

[...]

> Along with "BEAMER_env", headlines also support "BEAMER_act" and
> "BEAMER_opt" properties.  The former is translated as an overlay/action
> specification (or a default overlay specification when enclosed within
> square brackets) whereas the latter specifies options for the current
> frame ("fragile" option is added automatically, though).
>

I tried a few these too, works well. I recall you saying you would add
more overlay support gradually; I would like to say it would be nice if
there is support for replace-like overlays (e.g. \only or \onslide). It
would be great if I can wrap blocks in these. To illustrate what I mean,
I can produce the above effect with the following ugly hack:

  #+OPTIONS: H:2

  * Section
  ** Frame title
  Some more text

  #+LATEX: \only<1>{%
  *** Example block 					     :B_exampleblock:
      :PROPERTIES:
      :BEAMER_env: exampleblock
      :END:
  Some example text

  *** ignore 						    :B_ignoreheading:
      :PROPERTIES:
      :BEAMER_env: ignoreheading
      :END:
  #+LATEX: }

  #+LATEX: \only<2>{%
  *** Theorem block						  :B_theorem:
      :PROPERTIES:
      :BEAMER_env: theorem
      :END:
  Some bla bla ∀ \mathcal{R}

  *** ignore 						    :B_ignoreheading:
      :PROPERTIES:
      :BEAMER_env: ignoreheading
      :END:
  #+LATEX: }

> Every plain list has support for `:overlay' attribute (through
> ATTR_BEAMER affiliated keyword).  Also, ordered (resp. description)
> lists make use of `:template' (resp. `:long-text') attribute.
>

I wasn't clear what you meant here. Could you give an example? Did you
mean I can specify overlay specification for list items with the above
mechanism? I'm not clear on the syntax here.

I have another feature request (for the distant future) with regards to
lists; I would like to put tikz nodes in list items. I have tried that
in the past with very limited success. For an example, you can look
here:

<http://www.texample.net/tikz/examples/connecting-text-and-graphics/>

> Eventually, an export snippet with a value enclosed within angular
> brackets put at the beginning of an element or object whose type is
> among `bold', `item', `link', `radio-target' and `target' will control
> its overlay specifications.  As an example[fn:1],
>
>  *@@e-beamer:<2->@@some emphasized text*
>
> will be translated as
>
>  \alert<2->{some emphasized text}
>

Again, this works wonderfully.

[...]

> Also, on the minor changes list, syntax for BEAMER_THEME and alike is,
> for example:
>
>  #+BEAMER_THEME: Rochester [height=20pt]
>
I presume the beamer options go like the following?

  #+LATEX_CLASS_OPTIONS: [smaller,presentation]

I have a question; are subtree exports supported yet?

Great work!

Cheers,

--
Suvayu

Open source is the future. It sets us free.