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%
% `smptalk.sty' custom commands and settings used to make slides
%
% for use with `smptalk.tex' via \usepackage{smptalk}
%
% this is an example of a `package'. in this case, it merely
% defines some macros which are useful when making slides.
% one doesn't really need the next three, or the last command
% in this package, these are just formalities.

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{smptalk}[1997/02/20 v0.1a Sample user-developed package (BK)]
\typeout{Package: smptalk v0.1a <1997/02/20> (Bil Kleb)}

% turn off page numbers:

\pagestyle{empty}

% in general, we don't want filled and hyphenated output on slides:

\raggedright

% make sure we have the graphicx package loaded
% since it is used to include figures:

\RequirePackage{graphicx}

% define a command to include figures:
% use: \incfig{epsfigure} or \incfig[2in]{epsfigure}

\newcommand{\incfig}%             - name of command
           [2]%                   - number of arguments
           [\linewidth]%          - default value for optional 1st argument
           {%                     - begin definition
            \centering%           - center figure
            \includegraphics%     - graphicx's include command
               [width=#1,%        - set graphic width
                keepaspectratio]% - leave aspect ratio alone
               {#2}%              - name of figure
           }%                     - end definition

% un-comment one of the following to use Helvetica or Times
% fonts in place of Computer Modern (requires psfont distribution):
%\RequirePackage{times}
%\RequirePackage{helvetic}

% redefine an old command to make titles for each slide:
% use: \title{This is the Large, Centered Slide Title}

\renewcommand{\title}%     - name of command
             [1]%          - number of arguments
             {%            - begin definition
              \bgroup%     - begin a local group
              \centering%  - turn on centering
              \large\bf%   - select font
              #1%          - insert title text
              \par%        - end a paragraph (skip \parsep)
              \egroup%     - terminate local group
             }%            - complete definition

% define new itemize-like environment
% to make the vertical spacing tighter:

\newenvironment{items}%                  - define a new environment
  {%                                     - begin beginning definition
   \begin{itemize}%                      - revamp the itemize environment
   \raggedright%                         - don't hyphenate/fill lines
   \setlength{\itemsep}%                 - space between items
             {2pt plus 2pt minus 1pt}%     (rubber length)
   \setlength{\parskip}%                 - space between list and body
             {4pt plus 2pt minus 2pt}%     (rubber length)
   \setlength{\parsep}%                  - paragraphs within items
             {2pt plus 2pt minus 1pt}%     (rubber length)
  }%                                     - close beginning definition
  {\end{itemize}}%                       - ending definition

% make a description-like environment which
% justifies the labels according to an optional
% parameter and allows hyphenation of the labels

\newenvironment{describe}[1][1.25in]%
  {\begin{list}{}%
   {\renewcommand{\makelabel}{\describelabel}%
       \setlength{\labelwidth}{#1}%
       \setlength{\leftmargin}{\labelwidth}%
       \addtolength{\leftmargin}{\labelsep}%
       \setlength{\itemsep}{2pt plus 2pt minus 1pt}%
       \setlength{\parskip}{4pt plus 2pt minus 2pt}%
       \setlength{\parsep}{2pt plus 2pt minus 1pt}}}%
  {\end{list}}
\newcommand{\describelabel}[1]%
  {\raisebox{0pt}[1ex][0pt]{\makebox[\labelwidth][l]%
      {\parbox[t]{\labelwidth}{\hspace{0pt}\textbf{#1:}}}}}

% tell them we're through messing around, and get on with it:

\endinput