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%%
%% This is file `hilitexample.tex',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% texpower-doc.dtx (with options: `hilitexample,hilitexample-src,end')
%%
%% --------------------------------------------------------------
%% TeXPower bundle - dynamic online presentations with LaTeX
%% Copyright (C) 1999-2004 Stephan Lehmke
%% Copyright (C) 2003-2005 Hans Fredrik Nordhaug
%%
%% 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{hilitexample.tex}%
[2005/04/07 TeXPower example file]
%-----------------------------------------------------------------------------------------------------------------
%
% Highlighting example for the package texpower.sty.
%
%-----------------------------------------------------------------------------------------------------------------
% Use slifonts.
\RequirePackage{tpslifonts}
% Input the generic preamble.
\input{__TPpreamble}
\hypersetup{pdftitle={texpower highlighting example}}
% The package soul is needed for \highlighttext to work.
\usepackage{soul}
%-----------------------------------------------------------------------------------------------------------------
% Finally, everything is set up. Here we go...
%
\begin{document}
\begin{slide}
%-----------------------------------------------------------------------------------------------------------------
%
\makeslidetitle{\macroname{stepwise} Example: Highlighting Text}\label{Sec:Exhl}
% The default for \step's which are not yet `active' is to be `invisible'. In preceding examples, we have redefined
% internal macros like \hidestepcontents or \activatestep to achieve special `highlighting' effects.
% Here, we demonstrate how make text `stand out' from the background incrementally without having it appear from thin
% air.
% The first example demonstrates how to make \step its argument `stand out' instead of making it appear `out of
% nowhere'.
\makeatletter
\ifthenelse{\boolean{TPcolor}}% Can we use colors?
{% Yes. In this case \step should change colors from `dimmed' to `active'.
% The command \hidedimmed switches colors to `dimmed', the command \highlightenhanced switches colors to `enhanced'.
\liststepwise[\let\hidestepcontents=\hidedimmed\let\activatestep=\highlightenhanced]
{%
\vspace*{\fill}
\begin{quote}
\Large%
\step{Instead of making things appear out of `thin air',} \step{we can also make them appear `out of the
background'} \step{by incrementally changing color from \concept{inactive}} \step{to \concept{active}.}
\step{This also works with \emph{color emphasis}} \step{and \concept{math coloring}: $a=b^2$.}
\end{quote}
\vspace*{\fill}\vspace*{\fill}
}%
}
{% No. In this case we have to `handwave' using the soul package.
% Instead of hiding its argument, the new command \myhide just changes the font size (maintaining the overall text
% length though).
\def\myhide
{%
\leavevmode%
\SOUL@setup
\def\SOUL@everytoken{\makebox[\widthof{\the\SOUL@token}][s]{\rule[\depthof{\the\SOUL@token}*-1]{0pt}{\depthof{\the\SOUL@token}+\heightof{\the\SOUL@token}}\hrulefill\tiny\the\SOUL@token\hrulefill}\SOUL@setkern\SOUL@charkern}%
\SOUL@%
}
\liststepwise[\let\hidestepcontents=\myhide\setcounter{firststep}{0}]
{%
\vspace*{\fill}
\begin{quote}
\LARGE%
\step{Instead of making things appear out of `thin air',} \step{we can also make them appear `out of the
background'} \step{incrementally.}
\end{quote}
\vspace*{\fill}\vspace*{\fill}
}%
}
\makeatother
\newslide
% Next, it is demonstrated how we can `flip through' an itemize environment by just highlighting the items in turn
% instead of making them appear one by one.
%
% Define a macro \mystep which implements the highlighting effect.
\ifthenelse{\boolean{TPcolor}}% Can we use colors?
{% Yes. In this case highlighting is implemented by switching color.
\def\mystep% Note that \mystep takes no argument. It just changes the way the next item is displayed.
{%
\usecolorset{stwcolors}% Restore the undimmed colors valid at the beginning of \stepwise.
\dstep[][\boolean{firstactivation}]% \dstep switches colors. The optional argument makes it appear only once.
}%
}
{% No. In this case highlighting is implemented by redefining \labelitemi.
\def\mystep
{%
\switch[][\boolean{firstactivation}]% The optional arguments make \switch act only once.
{\def\labelitemi{\origmath{\gg}}}{\def\labelitemi{\origmath{\cdot}}}%
}%
}
% We define a custom itemize environment which automatically adds calls to \mystep:
\newenvironment{stepitemize}
{%
\huge
\begin{itemize}
\let\origitem=\item
% Here, the \mystep command is hidden inside \item
\renewcommand{\item}{\mystep\origitem}%
}
{%
\end{itemize}
}
Instead of displaying incrementally, we can just `flip through' some items by highlighting them:
% Note that we use the starred version of \liststepwise so that the first item is highlighted on the first slide
% produced by \liststepwise.
%
\liststepwise*
{%
\begin{stepitemize}
\item Item 1
\item Item 2
\item Item 3
\end{stepitemize}
}
\pause
% The following example demonstrates highlighting inside a paragraph using \highlighttext. By redefining \activatestep
% to \highlighttext, the argument of every \step will be highlighted when the \step is activated for the first
% time. Note that highlighting doesn't influence line breaks because \highlighttext is implemented using the soul
% package.
%
% Again, we define \hidestepcontents to display its argument, so that the complete text is visible from the outset.
\stepwise[\let\activatestep=\highlighttext\let\hidestepcontents=\displayidentical]
{%
\vspace*{\fill}
\begin{minipage}{\linewidth}
\LARGE
\step{Inside} a paragraph, we can \step{highlight} text \step{without influencing} \step{line breaks}.
\end{minipage}
\vspace*{\fill}
}
\newslide
\end{slide}
\end{document}
\endinput
%%
%% End of file `hilitexample.tex'.
|
