Stefan Svensson <[EMAIL PROTECTED]> wrote:
> I'm quite used to programming, but I have never programmed TeX (or do
> you mainly use MusicTeX macros?). Do you think you could give me a brief
> explanation of what's really happening here?
Thank you very much for your using this macro, Stefan.
I made some mistakes in previous version.
Fixed version of \TAG is here:
%----
\def\TAG#1{{%
\kern30pt\kern-\afterruleskip{%
\medtype
\setbox0\hbox{#1}\relax
\dimen0=\wd0 \ifdim\dimen0<2ex\relax \dimen0=2ex\fi
\boxit{\hbox to \dimen0{\hss\box0\hss}}}}}\relax
%----
The automatic horizontal alignment to barline is provided by
"\kern30pt\kern-\afterruleskip" .
The PMX command "h" generates following ~~~~~'d code:
(see the example I wrote)
% Bar count 1
\pnotes{2.83}\zcharnote{16}{\bigfont\kern-30pt \TAG{Intro}}\qu c\qu c%
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"\kern-30pt" moves the reference position of next string to 30pt left.
This code is inserted by the PMX program and is always "-30pt".
However, "-30pt" may be not appropriate when \afterruleskip
(=length from previous barline to first note of current bar)
is NOT 30pt. This mismatch may be caused by change with bars/line,
notes/bar, etc.
That's why you were in trouble with adjusting horizontal position.
So, I supress this inappropriate backspace "\kern-30pt" by "\kern30pt"
and make the correct backspace with "\kern-\afterruleskip" .
(Of course, this method is dependent on PMX versions.)
Other codes are basic commands of MusiXTeX or otherwise
primitives of plain-TeX.
So, please look at the MusiXTeX document and some plain-TeX based
guidance book (for example "TeX by Topic" by Victor Eijkhout) for
further information.
(A LaTeX-based guidance book will be no use for this purpose.)
Sincerely,
----
Hiroaki MORIMOTO <[EMAIL PROTECTED]>
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