

I have removed extraneous code (and yes I have tried it with only this code) from the full file, of which I show below.



example.tex

\documentclass[english]{Assignment}  \begin{document}  \assigntitle{4}  \end{document} 


Replay

For this implementation I'd suggest using \assigntitle not just to update some internal macro, but also to set the actual title:

\newcommand{\assigntitle}[1]{%
\begin{center}
\huge \upshape Assignment \# #1 \\
\normalsize \normalfont \@date
\end{center}
}



If you want to set a date other than \today, the you'd use

\date{January 1, 2001}
\assigntitle{4}



The basic problem is that \@assignment is used right at the start of the document body within \AtBeginDocument, so using \assigntitle{4} etc. after \begin{document} is ineffective, since the redefined \@assignment is never used then.

\centering should not occur outside of a group, so use \begingroup...\endgroup.

I suggest to use a pagestyle header (e.g. fancyhdr) rather which is updated, also using counters.

Assignment.cls

\ProvidesClass{Assignment}
\NeedsTeXFormat{LaTeX2e}

\DeclareOption*{\PassOptionsToClass{\CurrentOption}{article}}
\ProcessOptions

\newcommand{\@assignment}{Assignment \#}
\newcommand{\assigntitle}[1]{\edef\@assignment{Assignment \#{#1}}}

\AtBeginDocument{%
\begingroup
\centering
\huge \upshape \@assignment
\medskip

\normalsize \normalfont \@date

\bigskip

\endgroup
}

\endinput



driver.tex

\documentclass{Assignment}

\assigntitle{4}

\begin{document}
\end{document}



It's a “chicken and egg” problem: with this code you must state \assigntitle{4} before \begin{document}.

An alternative and perhaps better strategy is to it with \maketitle:

\ProvidesClass{Assignment}
\NeedsTeXFormat{LaTeX2e}

\DeclareOption*{\PassOptionsToClass{\CurrentOption}{article}}
\ProcessOptions

\newcommand{\@assignment}{Assignment \#}

\renewcommand\maketitle{%
\begingroup % <----- don't forget this one
\centering \huge \upshape \@assignment \\
\normalsize \normalfont \@date
\bigskip
\endgroup % <----- matching \begingroup
}

\endinput



Now your sample document can be in any of the two forms below

\documentclass{Assignment}

\assigntitle{4}

\begin{document}

\maketitle

\end{document}



or

\documentclass{Assignment}

\begin{document}

\assigntitle{4}

\maketitle

\end{document}



You can add \date{July 28, 2016} anywhere before \maketitle.

The \begingroup and \endgroup tokens I added are necessary if you don't want \centering going on for the whole document.

If you still need \maketitle, use a different name for the command producing the header.

Note that typesetting material using \AtBeginDocument is not recommended, because several packages that a user might add after declaring the class do their business using that hook and so they would act after the header has been typeset.

Category: macros Time: 2016-07-28 Views: 0

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