Re: "Animation" in slides (\presentationstep, metafun)

[Hans Hagen <pragma@wxs.nl>]

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Mojca Miklavec wrote:

> 2.) filling-up a table
>
> This is a more complicated example and probably "playing with TeX" may
> be the only solution, but I'll ask anyway.
>
> I need to make something similar as, say, multiplication table or a
> table for dynamic programming calculation of minimum editing distance.
>
> There is a n*m table, whose fields have to be filled step-by-step
> (sometimes the last entries in bold or in red) on consecutive slides.
> Copy-pasting and correcting the table ten or twenty times makes no sense.
>
> I would be grateful on any suggestion about how to solve this problem.


(for efficiency reasons, in s-pre-60 patch):

\def\StartSteps{\iftrialtypesetting\else\ResetStep\NextStep\StartStep\fi}
\def\StopSteps {\iftrialtypesetting\else\StopStep\PrevStep\fi}
\def\FlushStep {\iftrialtypesetting\else\StopStep\NextStep\StartStep\fi}

and then:

\usemodule[pre-61]

\starttext

\StartSteps

\starttabulate
\NC test \FlushStep \NC test \FlushStep \NC \NR
\NC test \FlushStep \NC test \FlushStep \NC \NR
\NC test \FlushStep \NC test \FlushStep \NC \NR
\stoptabulate

\StopSteps

\stoptext

> In the above mentioned example in Prosper this kind of page numbering 
> is solved exactly the way I like.

the StartSteps etc gives this for free -)

Implementing al those fancy things is not that complex since most of the 
the machinery is available in context for years now, but time ...

(being at a few tex conferences recently and seen prosper in action ... 
i don't like presentations all look the same, which is why i prefer to 
provide a general solution that can be applied to any style, i also get 
the creep of the document source coding some people showed me;  so, in 
due time i will extend the Stepper (a more complex example is the self 
running dante XV presentation -- on out site; which reminds me that i 
have to document and post that style)

(personally i more and more tend to clean and sober presentations -)

Hans 

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