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+%%
+%% This is file `divexample.tex',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% texpower-doc.dtx  (with options: `divexample,divexample-src,end')
+%% 
+%% --------------------------------------------------------------
+%% TeXPower bundle - dynamic online presentations with LaTeX
+%% Copyright (C) 1999-2004 Stephan Lehmke
+%% 
+%% This program is free software; you can redistribute it and/or
+%% modify it under the terms of the GNU General Public License
+%% as published by the Free Software Foundation; either version 2
+%% of the License, or (at your option) any later version.
+%% 
+%% This program is distributed in the hope that it will be useful,
+%% but WITHOUT ANY WARRANTY; without even the implied warranty of
+%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+%% GNU General Public License for more details.
+%% --------------------------------------------------------------
+%% 
+%% The list of all files belonging to the TeXPower bundle is
+%% given in the file `00readme.txt'.
+%% 
+\ProvidesFile{divexample.tex}%
+      [2004/07/27 TeXPower example file]
+%-----------------------------------------------------------------------------------------------------------------
+% File: divexample.tex
+%
+% Divisibility example (demonstrating \step's optional arguments) for the package texpower.sty.
+%
+% This file can be compiled with pdfLaTeX or (standard) LaTeX. When using standard LaTeX, the dvi file produced should
+% be processed with
+%
+% dvips -Ppdf -j0 divexample
+%
+% afterwards processing the resulting ps file with
+%
+% distill divexample.ps
+%
+% (The syntax is for a unix system with tetex 1.0 and distiller 3. Modify appropriately for other configurations.)
+%
+% The resulting pdf file is meant for presenting `interactively' with Adobe Acrobat Reader.
+%
+%-----------------------------------------------------------------------------------------------------------------
+% Autor: Stephan Lehmke <Stephan.Lehmke@cs.uni-dortmund.de>
+%
+% v0.0.1 Mar 20, 2000: First version for the pre-alpha release of TeXPower.
+%
+% v0.0.2 Apr 26, 2000: Some small changes in preparation of the update to TeXpower v0.0.7.
+%
+% v0.0.3 May 18, 2000: New file name.
+%
+
+%-----------------------------------------------------------------------------------------------------------------
+% We input the generic preamble.
+
+\input{__TPpreamble}
+\hypersetup{pdftitle={texpower divisibility example}}
+
+
+%-----------------------------------------------------------------------------------------------------------------
+% Finally, everything is set up. Here we go...
+%
+\begin{document}
+\begin{slide}
+  % As the sectioning in the example files starts with \subsection, we `grade down' the sectioning commands.
+  \let\subsubsection\subsection
+  \let\subsection\section
+%-----------------------------------------------------------------------------------------------------------------
+%
+\makeslidetitle{\macroname{stepwise} Example: Fooling Around}\label{Sec:ExFooling}
+% The following example is just to show that a lot of fancy things are possible by appropriately defining the diverse
+% `hooks' offererd by \stepwise.
+`Tweaking' the hooks a little allows some truly bizarre applications\dots
+
+% In the following \stepwise command, \activatestep will be set to \textbf. This means the `first' occurrence of a number
+% is wider (because bf is an extended font) than all other occurrences of it. To avoid glitches in line breaks, all
+% other occurrences of numbers (visible and invisible) need to be of the same width. Hence we define new versions of
+% \displaystepcontents and \hidestepcontents.
+\def\mydisplay#1{\makebox[\widthof{\textbf{#1}}]{#1}}
+\def\myhide#1{\phantom{\makebox[\widthof{\textbf{#1}}]{#1}}}
+
+\newcounter{modulo}
+\newcounter{i}
+
+% Finally, we define a custom \step command which sets the optional arguments of \step.
+% We already have introduced the first optional argument, which determines when a \step is activated for the first
+% time. Here, this one is left at its default value (\value{step}=\value{stepcommand}).
+% Here, we also use the second optional argument, which has the same syntax as the first one (i.e. it can be surrounded
+% either by square brackets or braces), but determines when a \step is active _at all_ (i.e. whether
+% \displaystepcontents or \hidestepcontents is used). The default is the internal check \if@first@TP@true, which determines
+% whether step number \value{stepcommand} has already been activated for the first time (this is saved internally for
+% every step). Now, we redefine this condition to be fulfilled whenever the value of the counter step is divisible by
+% the value of the counter stepcommand.
+\def\mystep{\step[](\setcounter{modulo}{\value{step}/\value{stepcommand}*\value{stepcommand}}\ifthenelse{\value{step}=\value{modulo}})}%
+
+
+% By setting the page duration to 0.5 seconds, we make the following sequence of slides appear automatically one by one,
+% one every half second.
+
+\pageDuration{0.5}
+
+%
+% We use the custom command \parstepwise which not only wraps the whole argument of \stepwise into a minipage (because
+% otherwise vertical spacing goes haywire, don't ask me why), but also gives substance to steps. We use the starred
+% version of this command so that the number 1 appears on the first slide generated by \parstepwise.
+%
+% \activatestep is set to \textbf to emphasize the number the divisors of which are displayed.
+\parstepwise*[\let\activatestep=\textbf\let\displaystepcontents=\mydisplay\let\hidestepcontents=\myhide]
+{%
+  \huge
+  \setcounter{i}{0}%
+    Divisibility demo:
+
+    % We just have to generate the appropriate number of \mystep commands which display `their' numbers.
+    \whiledo{\value{i}<40}{\stepcounter{i}\mystep{\arabic{i}} }%
+
+  }
+
+% Stop automatic advancing of pages.
+
+\stopAdvancing
+\end{slide}
+\end{document}
+\endinput
+%%
+%% End of file `divexample.tex'.