Re: \presentationstep

Re: \presentationstep

[Otared Kavian]

At 18:38 -0500 2/11/04, David Munger wrote:
>
>I think the latest Acrobat Reader version for Linux is 5.0.9. I guess
>this means I should forget about steps. Thanks anyway.
>
>David
>

Hi David,

A few months ago I had to use steps in my presentations, but since I 
could not use thouroughly s-pre-60.tex (and the examples given in 
s-pre-61.tex) I ended up
writing a few macros which work fine with ConTeXt and the presentation modules.
These macros are very elementary and crude, but they work...
If I succeed to learn how to use layers smartly as does Hans, I will 
write these macros again. :-)

Below are the macros and some examples.
Best regards: OK
%%%%%%%%%%%% begin test-step-ok.tex
%%K test-step-ok.tex

%%K Here we use the plain \TeX\ command \phantom{} in order to have
%%K some material appear step by step.
%%K The structure is quite simple, but since I am not very
%%K familiar with ConTeXt, I cannot write elegant code as does
%%K Hans Hagen...
%%K
%%K An advantage is that the code can be used also in
%%K plain TeX, in LaTeX and other macro-packages.
%%K

\newif\ifSteppingSlide
\SteppingSlidetrue   %%K this is when you want a step by step presentation
%\SteppingSlidefalse %%K this is when you want to print the slides
%
\newcount\StepsCounter
\StepsCounter=0
%
\newcount\NumberOfSteps
\NumberOfSteps=10
%
\newcount\BeforeStepNumber
\BeforeStepNumber=0
%
%%K StepBetween[number1,number2]{material} will make "material"
%%K appear between steps "number1" and "number2"
\def\StepBetween[#1,#2]#3{%
\ifSteppingSlide
  \ifnum#1>\StepsCounter \phantom{#3}
   \else
     \ifnum#2<\StepsCounter \phantom{#3}
       \else \relax #3
      \fi
   \fi
   \else {#3}
\fi}
%
%%K Step{number1}{material} will make "material"
%%K appear beginning with step "number1" until "NumberOfSteps"
\def\Step#1#2{\StepBetween[#1,\NumberOfSteps]{#2}}
%
%%K OnlyStep{number1}{material} will make "material"
%%K appear only on step "number1"
\def\OnlyStep#1#2{\StepBetween[#1,#1]{#2}}
%
%%K StepBefore{number1}{material} will make "material"
%%K appear only on all steps before "number1"
\def\StepBefore#1#2{
\global\BeforeStepNumber=#1
\StepBetween[0,\BeforeStepNumber]{#2}}
%
\long\def\SlideWithSteps#1#2{
\ifSteppingSlide
\global\StepsCounter=0
\global\NumberOfSteps=#1
\MakeSteps{#2}
\else #2
\fi}
%
\long\def\MakeSteps#1{\loop #1
\ifnum\StepsCounter<\NumberOfSteps
\global\advance\StepsCounter by 1\vfill\eject
\repeat
\vfill\eject}
%


%%K This is the end of the macros
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% \endinput

%%K Here is a sample of how you can use these macros
%%K
\starttext

\startitemize

\SlideWithSteps{8}{
\item Consider the following nonlinear equation:
$$\Step{8}{{\partial u \over \partial t}} \Step{1}{-\Delta u + 
|u|^{p-1}u} \Step{2}{=} \Step{3}{f} \Step{4}{+{\rm div}(g)} 
\Step{5}{+|\nabla u|{\Step{6}{^2}}}$$
\StepBetween[3,5]{\item This line appears only between steps 3 and 5}
\Step{8}{\item The equation may be parabolic.}
\StepBefore{4}{\item This line appears only before step 4.}
\OnlyStep{4}{\item This line appears only at step 4.}
\vfill (Here you see step number \the\StepsCounter)
} % end of \SlideWithSteps

\stopitemize
\page

\stoptext
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Re: \presentationstep

[David Munger]

Hi Otared,

Thanks a lot for you macros. They do the job pretty well. They remind me
of the way Prosper does things. When I have time, I'll try to find out
how to Wiki your post. Thanks again!

David

Otared Kavian wrote :
> Hi David,
> 
> A few months ago I had to use steps in my presentations, but since I 
> could not use thouroughly s-pre-60.tex (and the examples given in 
> s-pre-61.tex) I ended up
> writing a few macros which work fine with ConTeXt and the presentation modules.
> These macros are very elementary and crude, but they work...
> If I succeed to learn how to use layers smartly as does Hans, I will 
> write these macros again. :-)
> 
> Below are the macros and some examples.
> Best regards: OK
> %%%%%%%%%%%% begin test-step-ok.tex
> %%K test-step-ok.tex
> 
> %%K Here we use the plain \TeX\ command \phantom{} in order to have
> %%K some material appear step by step.
> %%K The structure is quite simple, but since I am not very
> %%K familiar with ConTeXt, I cannot write elegant code as does
> %%K Hans Hagen...
> %%K
> %%K An advantage is that the code can be used also in
> %%K plain TeX, in LaTeX and other macro-packages.
> %%K
> 
> \newif\ifSteppingSlide
> \SteppingSlidetrue   %%K this is when you want a step by step presentation
> %\SteppingSlidefalse %%K this is when you want to print the slides
> %
> \newcount\StepsCounter
> \StepsCounter=0
> %
> \newcount\NumberOfSteps
> \NumberOfSteps=10
> %
> \newcount\BeforeStepNumber
> \BeforeStepNumber=0
> %
> %%K StepBetween[number1,number2]{material} will make "material"
> %%K appear between steps "number1" and "number2"
> \def\StepBetween[#1,#2]#3{%
> \ifSteppingSlide
>   \ifnum#1>\StepsCounter \phantom{#3}
>    \else
>      \ifnum#2<\StepsCounter \phantom{#3}
>        \else \relax #3
>       \fi
>    \fi
>    \else {#3}
> \fi}
> %
> %%K Step{number1}{material} will make "material"
> %%K appear beginning with step "number1" until "NumberOfSteps"
> \def\Step#1#2{\StepBetween[#1,\NumberOfSteps]{#2}}
> %
> %%K OnlyStep{number1}{material} will make "material"
> %%K appear only on step "number1"
> \def\OnlyStep#1#2{\StepBetween[#1,#1]{#2}}
> %
> %%K StepBefore{number1}{material} will make "material"
> %%K appear only on all steps before "number1"
> \def\StepBefore#1#2{
> \global\BeforeStepNumber=#1
> \StepBetween[0,\BeforeStepNumber]{#2}}
> %
> \long\def\SlideWithSteps#1#2{
> \ifSteppingSlide
> \global\StepsCounter=0
> \global\NumberOfSteps=#1
> \MakeSteps{#2}
> \else #2
> \fi}
> %
> \long\def\MakeSteps#1{\loop #1
> \ifnum\StepsCounter<\NumberOfSteps
> \global\advance\StepsCounter by 1\vfill\eject
> \repeat
> \vfill\eject}
> %
> 
> 
> %%K This is the end of the macros
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> 
> % \endinput
> 
> %%K Here is a sample of how you can use these macros
> %%K
> \starttext
> 
> \startitemize
> 
> \SlideWithSteps{8}{
> \item Consider the following nonlinear equation:
> $$\Step{8}{{\partial u \over \partial t}} \Step{1}{-\Delta u + 
> |u|^{p-1}u} \Step{2}{=} \Step{3}{f} \Step{4}{+{\rm div}(g)} 
> \Step{5}{+|\nabla u|{\Step{6}{^2}}}$$
> \StepBetween[3,5]{\item This line appears only between steps 3 and 5}
> \Step{8}{\item The equation may be parabolic.}
> \StepBefore{4}{\item This line appears only before step 4.}
> \OnlyStep{4}{\item This line appears only at step 4.}
> \vfill (Here you see step number \the\StepsCounter)
> } % end of \SlideWithSteps
> 
> \stopitemize
> \page
> 
> \stoptext
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
> http://www.ntg.nl/mailman/listinfo/ntg-context

Re: \presentationstep

[Otared Kavian]

At 11:42 -0500 3/11/04, David Munger wrote:
>Hi Otared,
>
>Thanks a lot for you macros. They do the job pretty well. They remind me
>of the way Prosper does things. When I have time, I'll try to find out
>how to Wiki your post. Thanks again!
>
>David

Hi David,

I am happy that what I sent you was useful.

Indeed I got the idea of the macros after having seen a presentation 
with Prosper, but since I don't use LaTeX I wrote those macros (I use 
only Plain TeX and ConTeXt for its beauty...).
Thank you for putting the macros on Wiki with contextgarden. If I 
could improve the macros I'll let the contexters know.

Best regards: OK

Re: \presentationstep

[David Munger]

Hi all,

Inspiring from Otared Kavian's code and Han's presentation styles with
support for steps, I cooked the following in order to solve the non
JavaScript version issue. I post it in case it could be useful to other
people.

This implementation supports an \{Only|From|Until}Step[n] syntax as well
as the simple \NextStep-style one.

Otared: Any comments or suggestions?

And here is an example of usage:

-------------------------------------------
\StartSteps[Slide Title]           % the title is passed to
                                   % the \Subject macro

\startitemize
\item Item 1
\OnlyStep[2]  {\item (oops!)}
\UntilStep[4] {\item Item 2*}
\FromStep[4]  {\item Item 2}
\stopitemize

\StopSteps
-------------------------------------------

And here is a mixed example:

-------------------------------------------
\StartSteps[Navier||Stokes equation]

\[
  \frac{D\vec u}{Dt} =
    \FromStep[2][reserve]{-{\red \frac1\rho \vec\nabla p}}
    \FromStep[3][reserve]{+\;{\green \vec g}}
    \FromStep[4][reserve]{+\;{\blue \frac1\rho \div S}}
\]

Momentum transport:	\NextStep
\item {\red   Pressure gradient}	\par\NextStep
\item {\green Gravity}                  \par\NextStep
\item {\blue  Stress (viscous, turbulent, Maxwell)}

\StopSteps
-------------------------------------------

And here's the code:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% steps for slides
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\unprotect

\newif\ifUseSteps
\UseStepstrue
% \UseStepsfalse


\long\def\StartSteps[#1]#2\StopSteps{%
  \let\steps@number\plusone%
  \let\steps@counter\plusone%
  \ifUseSteps%
    \loop%
      \let\steps@autocounter\zerocount%
      \Subject{#1}\par\steps@startstep#2\steps@stopstep%
      \steps@updatenumber\steps@autocounter%
    \ifnum\steps@counter<\steps@number%
      \increment\steps@counter%
    \repeat%
  \else%
    \Subject{#1}\par\steps@startstep#2\steps@stopstep%
  \fi}

\def\NextStep{\steps@stopstep\steps@startstep}

\def\OnlyStep[#1]{%
  \steps@updatenumber#1%
  \def\steps@cond{\steps@counter=#1}%
  \dosingleempty\steps@dostep}

\def\FromStep[#1]{%
  \steps@updatenumber#1%
  \let\steps@tmpcounter\zerocount%
  \increment(\steps@tmpcounter,#1-1)%
  \def\steps@cond{\steps@counter>\steps@tmpcounter}%
  \dosingleempty\steps@dostep}

\def\UntilStep[#1]{%
  \steps@updatenumber#1%
  \def\steps@cond{\steps@counter<#1}%
  \dosingleempty\steps@dostep}



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% internal macros
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\newcounter\steps@counter
\newcounter\steps@autocounter
\newcounter\steps@number
\newcounter\steps@tmpcounter

\def\steps@startstep{%
  \increment\steps@autocounter%
  \def\steps@hide{no}%
  \ifUseSteps%
    \ifnum\steps@autocounter>\steps@counter%
      \def\steps@hide{yes}%
    \fi%
  \fi%
  \starthidden}

\def\steps@stopstep{\stophidden}

\def\steps@updatenumber#1{\ifnum\steps@number<#1%
  \doglobal\let\steps@number\zerocount%
  \doglobal\increment(\steps@number,#1)\fi}

\defineframedtext
  [step@frame]
  [offset=overlay,width=broad,height=fit,frame=off]

\def\starthidden{\startstep@frame[empty=\steps@hide]}
\def\stophidden{\stopstep@frame}


\long\def\steps@dostep[#1]#2{%
  \processallactionsinset
    [#1]
    [	reserve=>\let\steps@next=\steps@dostepreserve,
	\s!default=>\let\steps@next=\steps@dostepnoreserve]
  \steps@next{#2}}

\long\def\steps@dostepreserve#1{%
  \def\steps@hide{no}%
  \ifUseSteps%
    \ifnum\steps@cond\else%
      \def\steps@hide{yes}%
    \fi%
  \fi%
  \ifmmode\expandafter\mframed\else\expandafter\framed\fi%
  [empty=\steps@hide,frame=off,offset=overlay]{#1}%
  \ifmmode\;\fi}

\long\def\steps@dostepnoreserve#1{%
  \def\steps@next{#1\ifmmode\;\fi}%
  \ifUseSteps%
    \ifnum\steps@cond\else\def\steps@next{\relax}\fi%
  \fi\steps@next}

\protect

Re: \presentationstep

[Otared Kavian]

At 3:07 -0500 6/11/04, David Munger wrote:
>Hi all,
>
>Inspiring from Otared Kavian's code and Han's presentation styles with
>support for steps, I cooked the following in order to solve the non
>JavaScript version issue. I post it in case it could be useful to other
>people.
>
>This implementation supports an \{Only|From|Until}Step[n] syntax as well
>as the simple \NextStep-style one.
>
>Otared: Any comments or suggestions?
>
>And here is an example of usage:
>
>-------------------------------------------
>\StartSteps[Slide Title]           % the title is passed to
>                                    % the \Subject macro

Hi David, Hi all Contexters,

Sorry for being late in answering.

I just tried to test your code but did not succeed in showing things 
step by step, even after adding:
\def\Subject#1{\centerline{\bf #1}}
\setuppapersize [S6][S6]
\setupcolors[state=start]
and changing the commands \[ and \] (which are probably from a LaTeX 
background) into \startformula and \stopformula.

What I get doesn't show any step, but only one or two pages with 
several "Slide Title", and the items you had in your example, on it, 
and one or two pages with "Navier-Stokes equation".

Am I missing something? Could you please send me (if necessary off 
List) a source file of yours which is completely working?

Best regards: OK

Re: \presentationstep

[David Munger]

Otared Kavian wrote :
> Hi David, Hi all Contexters,
> 
> Sorry for being late in answering.
> 
> I just tried to test your code but did not succeed in showing things 
> step by step, even after adding:
> \def\Subject#1{\centerline{\bf #1}}
> \setuppapersize [S6][S6]
> \setupcolors[state=start]
> and changing the commands \[ and \] (which are probably from a LaTeX 
> background) into \startformula and \stopformula.
> 
> What I get doesn't show any step, but only one or two pages with 
> several "Slide Title", and the items you had in your example, on it, 
> and one or two pages with "Navier-Stokes equation".
> 
> Am I missing something? Could you please send me (if necessary off 
> List) a source file of yours which is completely working?
> 
> Best regards: OK

Oh sorry for not being clear about it. I was assuming that some
presentation module would be imported, for instance:
\usemodule[pre-original]

So probably there lacks a \page command in your \Subject definition.

About the \[ and \]: you're right. I was using the amsl module from
Giuseppe Bilotta.

Thanks for your remarks. :-)


So, assuming that the steps code is in a file name t-rsteps.tex, the
complete example would be:

----------------------------------------------------------

\usemodule [pre-original]
\usemodule [rsteps]

\starttext
\StartSteps[Slide Title]           % the title is passed to
                                   % the \Subject macro

\startitemize
\item Item 1
\OnlyStep[2]  {\item (oops!)}
\UntilStep[4] {\item Item 2*}
\FromStep[4]  {\item Item 2}
\stopitemize

\StopSteps

\StartSteps[Navier||Stokes equation]

\startformula
  \frac{D\vec u}{Dt} =
    \FromStep[2][reserve]{-{\red \frac1\rho \vec\nabla p}}
    \FromStep[3][reserve]{+\;{\green \vec g}}
    \FromStep[4][reserve]{+\;{\blue \frac1\rho \vec\nabla\cdot S}}
\stopformula

Momentum transport:     \NextStep
\item {\red   Pressure gradient}        \par\NextStep
\item {\green Gravity}                  \par\NextStep
\item {\blue  Stress (viscous, turbulent, Maxwell)}

\StopSteps
\stoptext

----------------------------------------------------------

Re: \presentationstep

[Otared Kavian]

At 19:57 -0500 7/11/04, David Munger wrote:
>Oh sorry for not being clear about it. I was assuming that some
>presentation module would be imported, for instance:
>\usemodule[pre-original]
>
>So probably there lacks a \page command in your \Subject definition.
>
>About the \[ and \]: you're right. I was using the amsl module from
>Giuseppe Bilotta.
>
>Thanks for your remarks. :-)
>
>
>So, assuming that the steps code is in a file name t-rsteps.tex, the
>complete example would be:
>
>----------------------------------------------------------
>
>\usemodule [pre-original]
>\usemodule [rsteps]

Hi David,

Thanks for the details. Indeed I get now what is expected from your 
macros, and as a matter of fact the result is much much better than 
that of my crude macros... You did a great improvement!
So I am going to use yours from now on: thanks again!

If I can suggest a possible improvement to the t-rsteps.tex macros, 
it is the following:
When one uses these macros with an automatic numbering such as 
\placeformula[equation-reference] (see the example below), with each 
invocation of \page (that is a step) the number increases, and this 
is an unwanted side result. Would it possible to "freeze" the 
numbering procedure in such a way that the number doesn't change in 
each step? (When I was using my macros, I didn't use \placeformula in 
sildes with steps, but rather an old \leqno from plain TeX).

Best regards: OK
%%%%%%%%%%%%%%%%%%%%%%% example steps-david-2.tex
\usemodule [pre-original]
\usemodule [rsteps]

\starttext
\StartSteps[Slide Title]           % the title is passed to
                                    % the \Subject macro defined in pre-original

\startitemize

\FromStep[1] {\item {\bf Lemma. } {\it For any $u,v \in H$, a Hilbert 
space, we have the following Cauchy-Schwarz inequality\/}
\placeformula[Cauchy-Schwarz]
\startformula
|(u|v)| \leq \Vert u\Vert \cdot \Vert v \Vert.
\stopformula}

\FromStep[2] {\item {\bf Proof. } Consider $f(t):= (u+tv|u+tv)$ for 
$t\in {\Bbb C}$.}

\FromStep[3]{\item We have $f(t) \geq 0$ for all $t\in {\Bbb C}$.}

\stopitemize

\StopSteps

\stoptext
%%%%%%%%%%%%%%%%%% end example steps-david-2.tex

Re: \presentationstep

[David Munger]

Otared Kavian wrote :
> Hi David,
> 
> Thanks for the details. Indeed I get now what is expected from your 
> macros, and as a matter of fact the result is much much better than 
> that of my crude macros... You did a great improvement!
> So I am going to use yours from now on: thanks again!
> 
> If I can suggest a possible improvement to the t-rsteps.tex macros, 
> it is the following:
> When one uses these macros with an automatic numbering such as 
> \placeformula[equation-reference] (see the example below), with each 
> invocation of \page (that is a step) the number increases, and this 
> is an unwanted side result. Would it possible to "freeze" the 
> numbering procedure in such a way that the number doesn't change in 
> each step? (When I was using my macros, I didn't use \placeformula in 
> sildes with steps, but rather an old \leqno from plain TeX).

Excellent idea indeed! Here's the fix. It is obviously not optimal,
though it allows for multiple formula numbers on the same slide. Try it
with:
texexec --pdf --mode=demo t-rsteps

Thanks for your advice.

David

------------------------------------------------------------

%D \module
%D   [      file=t-rsteps,
%D        version=2004.11.08,
%D          title=\CONTEXT\ User Module,
%D       subtitle=Raw steps for slides,
%D         author=David Munger,
%D           date=\currentdate,
%D      copyright={David Munger}]

% Thanks to Otared Kavian whose work inspired this module,
% and who contributed to its development.


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% steps for slides
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\unprotect

\newif\ifUseSteps
\UseStepstrue
% \UseStepsfalse

\definecolor [highlightcolor] [blue]

\long\def\StartSteps[#1]#2\StopSteps{%
  \begingroup%
  \let\steps@number\plusone%
  \let\steps@counter\plusone%
  \ifUseSteps%
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %% Workaround to make formula numbers "stick"
    \def\placeformula[##1]{%
      \incrementnumber[formula]%
      \expandafter\xdef\csname steps@eqnum##1
\endcsname{\rawnumber[formula]}
      \expandafter\xdef\csname steps@eqnum
\endcsname{\rawnumber[formula]}
      \dodoubleempty\doplaceformula[##1]}
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \loop%
      \let\steps@autocounter\zerocount%
      \Subject{#1}\par\steps@startstep#2\steps@stopstep%
      \steps@updatenumber\steps@autocounter%
    \ifnum\steps@counter<\steps@number%
      \increment\steps@counter%
      %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
      %% Workaround to make formula numbers "stick"
      \def\placeformula[####1]{%
	\setnumber[formula]{\csname steps@eqnum####1\endcsname}%
	\setfalse\incrementformulanumber%
	\dodoubleempty\doplaceformula[####1]}
      %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \repeat%
  \else%
    \Subject{#1}\par\steps@startstep#2\steps@stopstep%
  \fi%
  \endgroup}

\def\NextStep{\steps@stopstep\steps@startstep}

\def\OnlyStep[#1]{%
  \steps@updatenumber#1%
  \def\steps@cond{\steps@counter=#1}%
  \dosingleempty\steps@dostep}

\def\FromStep[#1]{%
  \steps@updatenumber#1%
  \let\steps@tmpcounter\zerocount%
  \increment(\steps@tmpcounter,#1-1)%
  \def\steps@cond{\steps@counter>\steps@tmpcounter}%
  \dosingleempty\steps@dostep}

\def\AfterStep[#1]{%
  \steps@updatenumber#1%
  \def\steps@cond{\steps@counter>#1}%
  \dosingleempty\steps@dostep}

\def\UntilStep[#1]{%
  \steps@updatenumber#1%
  \def\steps@cond{\steps@counter<#1}%
  \dosingleempty\steps@dostep}

\def\HighlightStep[#1]#2{%
  {\UntilStep[#1]{#2}\OnlyStep[#1]{\highlightcolor
#2}\AfterStep[#1]{#2}}}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% internal macros
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\newcounter\steps@counter
\newcounter\steps@autocounter
\newcounter\steps@number
\newcounter\steps@tmpcounter

\def\steps@startstep{%
  \increment\steps@autocounter%
  \def\steps@hide{no}%
  \ifUseSteps%
    \ifnum\steps@autocounter>\steps@counter%
      \def\steps@hide{yes}%
    \fi%
  \fi%
  \starthidden}

\def\steps@stopstep{\stophidden}

\def\steps@updatenumber#1{\ifnum\steps@number<#1%
  \doglobal\let\steps@number\zerocount%
  \doglobal\increment(\steps@number,#1)\fi}

\defineframedtext
  [step@frame]
  [offset=overlay,width=broad,height=fit,frame=off]

\def\starthidden{\startstep@frame[empty=\steps@hide]}
\def\stophidden{\stopstep@frame}


\long\def\steps@dostep[#1]#2{%
  \processallactionsinset
    [#1]
    [	reserve=>\let\steps@next=\steps@dostepreserve,
	\s!default=>\let\steps@next=\steps@dostepnoreserve]
  \steps@next{#2}}

\long\def\steps@dostepreserve#1{%
  \def\steps@hide{no}%
  \ifUseSteps%
    \ifnum\steps@cond\else%
      \def\steps@hide{yes}%
    \fi%
  \fi%
  \ifmmode\expandafter\mframed\else\expandafter\framed\fi%
  [empty=\steps@hide,frame=off,offset=overlay]{#1}%
  \ifmmode\;\fi}

\long\def\steps@dostepnoreserve#1{%
  \def\steps@next{#1\ifmmode\;\fi}%
  \ifUseSteps%
    \ifnum\steps@cond\else\def\steps@next{\relax}\fi%
  \fi\steps@next}

\protect

\doifnotmode{demo}{\endinput}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% usage example
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\usemodule [pre-original]
\usemodule [rsteps]

\starttext
\StartSteps[Slide Title]           % the title is passed to
                                   % the \Subject macro

\startitemize
\item Item 1
\OnlyStep[2]  {\item (oops!)}
\UntilStep[4] {\item Item 2*}
\FromStep[4]  {\item Item 2}
\stopitemize

\StopSteps

\StartSteps[Navier||Stokes equation]

\placeformula[eq:incompressibility]
\startformula
  \vec\nabla\cdot\vec u = 0
\stopformula

\placeformula[eq:NS]
\startformula
  \frac{D\vec u}{Dt} =
    \FromStep[2][reserve]{-{\red \frac1\rho \vec\nabla p}}
    \FromStep[3][reserve]{+\;{\green \vec g}}
    \FromStep[4][reserve]{+\;{\blue \frac1\rho \vec\nabla\cdot S}}
\stopformula

Momentum transport:     \NextStep
\item {\red   Pressure gradient}        \par\NextStep
\item {\green Gravity}                  \par\NextStep
\item {\blue  Stress (viscous, turbulent, Maxwell)}

\StopSteps
\stoptext

Re: \presentationstep

[Otared Kavian]

At 13:01 -0500 8/11/04, David Munger wrote:
>Excellent idea indeed! Here's the fix. It is obviously not optimal,
>though it allows for multiple formula numbers on the same slide. Try it
>with:
>texexec --pdf --mode=demo t-rsteps
>
>Thanks for your advice.

Hi David,

I could not get through the example file: here is what I get:
%%%%% begin error report:

! Missing number, treated as zero.
<to be read again>
                    \steps@eqnumeq:incompressibility
\setcounter ...ame #1\endcsname {\the \numexpr (#2
                                                   )}
\placeformula ...\csname steps@eqnum#1\endcsname }
                                                   \setfalse \incrementformul...

\@@plnbody ...\placeformula [eq:incompressibility]
                                                    \startformula \vec \nabla...

\@@plniterate ->\@@plnbody
                            \expandafter \@@plniterate \else \fi
\StartSteps ...y \doplaceformula [####1]} \repeat
                                                   \else \Subject {#1}\par \s...
l.41 \StopSteps
               
?
Process aborted

%%%%% end error report

I tried also the short example I sent you today, 
but I get the same result. Is there a 
transmission error in your file? (I should say 
that everything is fine if one doesn't have a 
\placeformula).

Finally, if I am not being too demanding, at the 
end of t-rsteps.tex, in your example of how to 
use the command (for the user's convenience) 
could you please incude all the possibilities of 
using the Step commands? that is instances of:

\OnlyStep[1]{\item something}
\FromStep[2]{\item something}
\AfterStep[3]{\item something}
\UntilStep[4]{\item something}
\HighlightStep[5]{\item something}
\NextStep[1]{\item something}

(Actually it seems that there is also a problem with \NextStep)
Best regards: OK

Re: \presentationstep

[David Munger]

Otared Kavian wrote :
> Hi David,
> 
> I could not get through the example file: here is what I get:


Argh... It's because of the line splits in email. I just put the file on
my website:

http://cfd.homelinux.org/tex/


Regards,

David

Re: \presentationstep

[Otared Kavian]

At 16:10 -0500 8/11/04, David Munger wrote:
>
>Argh... It's because of the line splits in email. I just put the file on
>my website:
>
>http://cfd.homelinux.org/tex/
>

Hi David and all ConTeXters,

I was away from my e-mail so I am late in answering.
Thank you for the file you put on your site. Indeed everything works 
as intended (the \placeformula no longer advances with each step), 
and I think one may suggest to Hans to include this in future 
distributions.

However, in the spirit of ConTeXters who are always asking for a 
step(!) towards perfectness, I let you know the following drawbacks 
of the macros:

1) Somehow the \FromStep[n][reserve] changes the internal mechanism 
of glue or spaces in displayed formulas. So one needs (as you do in 
your example) to add \; around operators such as +, -, =. Can one 
avoid this?

2) When one refers (see example below) with the command (\in[eq:NS]) 
to an equation which has been introduced with \placeformula[eq:NS] 
the interaction makes appear the first instance of that formula, 
which may be incomplete. Could one have a control over this, that is 
for instance, in this particular case, make appear the completed 
equation at the end of the slide made with \StartSteps[Navier||Stokes 
equation]?

Best regards: OK

%%%% file steps-david-3.tex
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% usage example
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\usemodule [pre-original]
\usemodule [rsteps]

\starttext
\StartSteps[Slide Title]           % the title is passed to
                                    % the \Subject macro

\startitemize
\item Item 1
\OnlyStep[2]  {\item (oops!)}
\UntilStep[4] {\item Item 2*}
\FromStep[4]  {\item Item 2}
\HighlightStep[3]{\item
Here is another version of Navier-Stokes equation}
\stopitemize

\StopSteps


\StartSteps[Navier||Stokes equation]

\placeformula[eq:incompressibility]
\startformula
   \vec\nabla\cdot\vec u = 0
\stopformula

\placeformula[eq:NS]
\startformula
   \frac{D\vec u}{Dt} =
     \FromStep[2][reserve]{-{\red \frac1\rho \vec\nabla p}}
     \FromStep[3][reserve]{+\;{\green \vec g}}
     \FromStep[4][reserve]{+\;{\blue \frac1\rho \vec\nabla\cdot S}}
\stopformula

Momentum transport:     \NextStep
\item {\red   Pressure gradient}        \par\NextStep
\item {\green Gravity}                  \par\NextStep
\item {\blue  Stress (viscous, turbulent, Maxwell)}


\StopSteps

\StartSteps[Navier Stokes equation]


\placeformula[eq:div-nul]
\startformula
   \vec\nabla\cdot\vec u = 0
\stopformula


\placeformula[eq:NStokes]
\startformula
   { \partial u \over \partial t} - \Delta u
       \FromStep[1][reserve]{{\red  \; +\; (u\cdot \nabla)u}}
     \FromStep[2][reserve]{{\green \; +\;  \nabla p}}
     \FromStep[3][reserve]{{\blue \; =\;  f(t,x)}}
\stopformula

Comments:
\NextStep \item Nonlinear equation (same is true for equation 
(\in[eq:NS]) \par\NextStep
\item One should add initial conditions \par\NextStep
\item and boundary conditions

\StopSteps
\stoptext
%%%%%% end file steps-david-3.tex

Re: \presentationstep

[David Munger]

Otared Kavian wrote :
> Hi David and all ConTeXters,
> 
> I was away from my e-mail so I am late in answering.
> Thank you for the file you put on your site. Indeed everything works 
> as intended (the \placeformula no longer advances with each step), 
> and I think one may suggest to Hans to include this in future 
> distributions.
> 
> However, in the spirit of ConTeXters who are always asking for a 
> step(!) towards perfectness, I let you know the following drawbacks 
> of the macros:
> 
> 1) Somehow the \FromStep[n][reserve] changes the internal mechanism 
> of glue or spaces in displayed formulas. So one needs (as you do in 
> your example) to add \; around operators such as +, -, =. Can one 
> avoid this?

I'm sorry, I'm no TeX/ConTeXt guru and I really have no idea of how to
achieve this. I think now we need Hans' help.

I have indeed noticed that enclosing an operator between braces breaks
the spacing system. Try, for instance:

\startformula
   \vec\nabla\cdot\vec u = 0
\stopformula
\startformula
   \vec\nabla\cdot\vec u {=} 0
\stopformula

Unfortunately, using \phatom{=} results in the same broken spacing as
second formula.

> 2) When one refers (see example below) with the command (\in[eq:NS]) 
> to an equation which has been introduced with \placeformula[eq:NS] 
> the interaction makes appear the first instance of that formula, 
> which may be incomplete. Could one have a control over this, that is 
> for instance, in this particular case, make appear the completed 
> equation at the end of the slide made with \StartSteps[Navier||Stokes 
> equation]?

Good point! Here's the fix (file updated on my website):

37c37
<       \dodoubleempty\doplaceformula[##1]}
---
>       \dodoubleempty\doplaceformula}
50c50,54
<       \dodoubleempty\doplaceformula[####1]}
---
>       \ifnum\steps@counter=\steps@number%
>         \def\steps@fnext{\dodoubleempty\doplaceformula[####1]}%
>       \else
>         \def\steps@fnext{\dodoubleempty\doplaceformula}%
>       \fi\steps@fnext}

Now we got rid of the duplicate label warnings. I also added your
contribution to the usage example. Thank you.

Regards,

David

Re: \presentationstep

[Hans Hagen]

David Munger wrote:

> I'm sorry, I'm no TeX/ConTeXt guru and I really have no idea of how to
> achieve this. I think now we need Hans' help.

I haven't followed the discussion so closely, what is the problem?

> Good point! Here's the fix (file updated on my website):
> 
> 37c37
> <       \dodoubleempty\doplaceformula[##1]}
> ---
> 
>>      \dodoubleempty\doplaceformula}
> 
> 50c50,54
> <       \dodoubleempty\doplaceformula[####1]}
> ---
> 
>>      \ifnum\steps@counter=\steps@number%
>>        \def\steps@fnext{\dodoubleempty\doplaceformula[####1]}%
>>      \else
>>        \def\steps@fnext{\dodoubleempty\doplaceformula}%
>>      \fi\steps@fnext}

eh ... are you redefining low level macros?

Can you give a minimal example of what you're doing?

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------

Re: \presentationstep

[David Munger]

Hans Hagen wrote :
> David Munger wrote:
> 
> > I'm sorry, I'm no TeX/ConTeXt guru and I really have no idea of how to
> > achieve this. I think now we need Hans' help.
> 
> I haven't followed the discussion so closely, what is the problem?

We're trying to implement steps-without-JavaScript for slides. You can
get the module here:

http://cfd.homelinux.org/tex/

The current problem, in its simplest form, is that using \mframed breaks
the spacing. Minimal example:

\starttext
We aim to get this spacing:
\startformula
a + b
\stopformula
but when using:
\startformula
a \mframed{+ b}
\stopformula
we get the same broken spacing as in:
\startformula
a {+ b}
\stopformula
\stoptext

> eh ... are you redefining low level macros?

I'd never dare to... ;-) Just overriding \placeformula within
\begingroup/\endgroup to mangle the formula numbers.


Thank you,

David

Re: \presentationstep

[Vit Zyka]

> 1) Somehow the \FromStep[n][reserve] changes the internal mechanism of 
> glue or spaces in displayed formulas. So one needs (as you do in your 
> example) to add \; around operators such as +, -, =. Can one avoid this?

Hi Otared,

I can give only explanation but in the moment i do not know the 
automatic solution.

Mathematical material are processed in a pieces called atoms. There are 
13 different atoms types (ord, op, bin, rel, open, close, punc, ...).
Mathematical characters (+, =, ...) have implicit types (bin, rel; in 
the case) or they can be set explicitly (\mathrel{<}, \mathop{\hbox{sin}}).

Spacing in mathematical mode is done according to types of neighbour 
atoms. TeX can add
   A) no space
   B) \mskip\thinmuskip
   C) \mskip\medmuskip
   D) \mskip\thickmuskip
between atoms if it is surrounded from left or right with
   ord op close inner D) REL   D) ord op open inner
   ord close inner    C) BIN   C) ord op close inner
                         PUNCT B) ord op rel open close punct inner
   ord close inner    B) OP    B) ord op
   ord op close       B) INNER B) ord open punct inner
If no pair is in this table (ord-ord) no space is added.
(Read the table as left-pair and right-pair not as triples.)

Example:
   1+1=2
expands like
   \mathord{1}\mathbin{+}\mathord{1}\mathrel{=}\mathord{2}
and typeset like
   \mathord{1}\C\mathbin{+}\C\mathord{1}\D\mathrel{=}\D\mathord{2}
(abbreviated by \def\B{\mskip\thinmuskip} etc.)

But there are some exceptions (e.g. bin is changed to ord if
   nothing bin op rel open punct BIN rel close punct
). It makes things more difficult.

So in your case the math is broken (by steps) into several separates 
that is why the atom neighbourhood is lost.

Example. Our 1+1=2 equation can be split to
   $1$$+1=2$
and mathbin + changes to ord and we lose space before (beginning of 
math) and after (will be ord-ord pair).

In this trivial example it can be solved by
   $1$$\mathord{}+1=2$

According to me, mathematical text has to be tuned manually in the 
normal case; this spacial one is not a exception ;-(
Vit Zyka


2. bin
3.
> 
> 2) When one refers (see example below) with the command (\in[eq:NS]) to 
> an equation which has been introduced with \placeformula[eq:NS] the 
> interaction makes appear the first instance of that formula, which may 
> be incomplete. Could one have a control over this, that is for instance, 
> in this particular case, make appear the completed equation at the end 
> of the slide made with \StartSteps[Navier||Stokes equation]?
> 
> Best regards: OK
> 
> %%%% file steps-david-3.tex
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> % usage example
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> 
> \usemodule [pre-original]
> \usemodule [rsteps]
> 
> \starttext
> \StartSteps[Slide Title]           % the title is passed to
>                                    % the \Subject macro
> 
> \startitemize
> \item Item 1
> \OnlyStep[2]  {\item (oops!)}
> \UntilStep[4] {\item Item 2*}
> \FromStep[4]  {\item Item 2}
> \HighlightStep[3]{\item
> Here is another version of Navier-Stokes equation}
> \stopitemize
> 
> \StopSteps
> 
> 
> \StartSteps[Navier||Stokes equation]
> 
> \placeformula[eq:incompressibility]
> \startformula
>   \vec\nabla\cdot\vec u = 0
> \stopformula
> 
> \placeformula[eq:NS]
> \startformula
>   \frac{D\vec u}{Dt} =
>     \FromStep[2][reserve]{-{\red \frac1\rho \vec\nabla p}}
>     \FromStep[3][reserve]{+\;{\green \vec g}}
>     \FromStep[4][reserve]{+\;{\blue \frac1\rho \vec\nabla\cdot S}}
> \stopformula
> 
> Momentum transport:     \NextStep
> \item {\red   Pressure gradient}        \par\NextStep
> \item {\green Gravity}                  \par\NextStep
> \item {\blue  Stress (viscous, turbulent, Maxwell)}
> 
> 
> \StopSteps
> 
> \StartSteps[Navier Stokes equation]
> 
> 
> \placeformula[eq:div-nul]
> \startformula
>   \vec\nabla\cdot\vec u = 0
> \stopformula
> 
> 
> \placeformula[eq:NStokes]
> \startformula
>   { \partial u \over \partial t} - \Delta u
>       \FromStep[1][reserve]{{\red  \; +\; (u\cdot \nabla)u}}
>     \FromStep[2][reserve]{{\green \; +\;  \nabla p}}
>     \FromStep[3][reserve]{{\blue \; =\;  f(t,x)}}
> \stopformula
> 
> Comments:
> \NextStep \item Nonlinear equation (same is true for equation 
> (\in[eq:NS]) \par\NextStep
> \item One should add initial conditions \par\NextStep
> \item and boundary conditions
> 
> \StopSteps
> \stoptext
> %%%%%% end file steps-david-3.tex
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
> http://www.ntg.nl/mailman/listinfo/ntg-context
> 

-- 
Vít Zýka --- http://typokvitek.com
     Automatic document typesetting
     Automaticka sazba dokumentu --
--

Re: \presentationstep

[Otared Kavian]

At 12:08 -0500 10/11/04, David Munger wrote:
>
>I'm sorry, I'm no TeX/ConTeXt guru and I really have no idea of how to
>achieve this. I think now we need Hans' help.
>
>I have indeed noticed that enclosing an operator between braces breaks
>the spacing system. Try, for instance:

Yes you are right! This is a problem with ConTeXt. I am going to post 
a message for the gurus as you say.

>Good point! Here's the fix (file updated on my website):

That's great! Everything works as expected.
But let's see, are you sure you are not a guru? I doubt now...

Best regards: OK

Re: \presentationstep

[Otared Kavian]

At 19:25 +0100 10/11/04, Vit Zyka wrote:
>Hi Otared,
>
>I can give only explanation but in the moment i do not know the 
>automatic solution.

Hi Vit,

Thank you for your insight. It is right that the same problem appears 
in Plain TeX, that is a binary operator within a pair of braces seems 
to loose its "binary" property.

I tried the sample file I sent in the thread "bug with glue and 
spaces in formulas?", with other macros packages and the result is 
the same.

Best regards: OK

Re: \presentationstep

[Eckhart Guthöhrlein]

Hi all,

I finally had some time to look at the recent discussion. Stepwise
presentations have always been somewhat tricky in context, at least for
me.
I think that the rsteps module is a very valuable contribution. No
JavaScript. No dependency on acrobat versions. Just steps.
Thanks to David & co, I hope you will be able to maintain the module.
Will it be included in the distribution?

Greetings,
Eckhart

Re: \presentationstep

[Hans Hagen]

David Munger wrote:
>>try
>>
>>texexec --pdf --mode=demo s-pre-61
> 
> 
> This is actually what I tried.
> 
> 
>>and see if that one suit syour needs (the stepper can be used with other sytles 
>>as well, once \usemodule[pre-60] is done; acrobat 6 needed)
> 
> 
> I think the latest Acrobat Reader version for Linux is 5.0.9. I guess
> this means I should forget about steps. Thanks anyway.

there are a couple of older presentation styles doing stepwise things (by 
duplicating boxes)

Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------

Re: \presentationstep

[David Munger]

> try
> 
> texexec --pdf --mode=demo s-pre-61

This is actually what I tried.

> and see if that one suit syour needs (the stepper can be used with other sytles 
> as well, once \usemodule[pre-60] is done; acrobat 6 needed)

I think the latest Acrobat Reader version for Linux is 5.0.9. I guess
this means I should forget about steps. Thanks anyway.

David

Re: \presentationstep

[h h extern]

David Munger wrote:
> Nothing seems to work here. I'm afraid the problem is indeed that
> Acrobat Reader under Linux is not really JavaScript aware...
> 
> Would it be possible to implement the steps commands such that steps
> span over multiple slides instead of being managed by JavaScript?

try

texexec --pdf --mode=demo s-pre-61

and see if that one suit syour needs (the stepper can be used with other sytles 
as well, once \usemodule[pre-60] is done; acrobat 6 needed)

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------

Re: \presentationstep

[David Munger]

Nothing seems to work here. I'm afraid the problem is indeed that
Acrobat Reader under Linux is not really JavaScript aware...

Would it be possible to implement the steps commands such that steps
span over multiple slides instead of being managed by JavaScript?

David


Le mardi 02 novembre 2004 à 10:58 +0100, Hans Hagen a écrit :
> Henning Hraban Ramm wrote:
> 
> > Am 02.11.2004 um 07:04 schrieb David Munger:
> > 
> >> Could someone tell me if I'm doing something bad here, please?
> >>
> >> File test.tex
> >> -------------------------------
> >> \usemodule[pre-original]
> >> \starttext
> >> \Subject{Test}
> >> step 1
> >> \presentationstep
> >> step 2
> >> \stoptext
> >> -------------------------------
> >> texexec --mode=step --output=pdf test.tex
> >>
> >> This gives me a white page instead of the text I get without
> >> `--mode=step'.
> > 
> > 
> > You doesn't define a "step" mode, so there's no output.
> > Completely logical. What's the matter?
> > 
> > You can use "--mode=something" switch only for environments like
> > \startmode[something]
> > \stopmode[something]
> > 
> > \startnotmode[something]
> > \stopnotmode[something]
> > 
> > See the wiki:
> > http://contextgarden.net/Modes
> > 
> > But probably you're looking for:
> > http://contextgarden.net/Presentation_effects
> 
> another option is to use s-pre-60
> 
> Hans
> 
> 
> -----------------------------------------------------------------
>                                            Hans Hagen | PRAGMA ADE
>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>       tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
>                                               | www.pragma-pod.nl
> -----------------------------------------------------------------
> 
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
> http://www.ntg.nl/mailman/listinfo/ntg-context

Re: \presentationstep

[Hans Hagen]

Henning Hraban Ramm wrote:

> Am 02.11.2004 um 07:04 schrieb David Munger:
> 
>> Could someone tell me if I'm doing something bad here, please?
>>
>> File test.tex
>> -------------------------------
>> \usemodule[pre-original]
>> \starttext
>> \Subject{Test}
>> step 1
>> \presentationstep
>> step 2
>> \stoptext
>> -------------------------------
>> texexec --mode=step --output=pdf test.tex
>>
>> This gives me a white page instead of the text I get without
>> `--mode=step'.
> 
> 
> You doesn't define a "step" mode, so there's no output.
> Completely logical. What's the matter?
> 
> You can use "--mode=something" switch only for environments like
> \startmode[something]
> \stopmode[something]
> 
> \startnotmode[something]
> \stopnotmode[something]
> 
> See the wiki:
> http://contextgarden.net/Modes
> 
> But probably you're looking for:
> http://contextgarden.net/Presentation_effects

another option is to use s-pre-60

Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------

Re: \presentationstep

[Henning Hraban Ramm]

Am 02.11.2004 um 07:04 schrieb David Munger:
> Could someone tell me if I'm doing something bad here, please?
>
> File test.tex
> -------------------------------
> \usemodule[pre-original]
> \starttext
> \Subject{Test}
> step 1
> \presentationstep
> step 2
> \stoptext
> -------------------------------
> texexec --mode=step --output=pdf test.tex
>
> This gives me a white page instead of the text I get without
> `--mode=step'.

You doesn't define a "step" mode, so there's no output.
Completely logical. What's the matter?

You can use "--mode=something" switch only for environments like
\startmode[something]
\stopmode[something]

\startnotmode[something]
\stopnotmode[something]

See the wiki:
http://contextgarden.net/Modes

But probably you're looking for:
http://contextgarden.net/Presentation_effects


Grüßlis vom Hraban!
---
http://www.fiee.net/texnique/

\presentationstep

[David Munger]

Hi,

Could someone tell me if I'm doing something bad here, please?

File test.tex
-------------------------------
\usemodule[pre-original]
\starttext
\Subject{Test}
step 1
\presentationstep
step 2
\stoptext
-------------------------------
texexec --mode=step --output=pdf test.tex

This gives me a white page instead of the text I get without
`--mode=step'.

Thanks for any help,

David