Re: [NTG-context] How to make \framed ignore the width of the rule

7 Jun 2007

      Huh?

This:

\starttext

\newdimen\scale \scale\1mm
\def\rule#1{\hrule width #1\scale}
\rule{10}

but you made this

\def\scale{1mm}
\def\rule#1{\hrule width #1\scale}
\rule{10}

\stoptext

Got me this error:

! Undefined control sequence.
l.4 \newdimen\scale \scale\1
                             mm

What am I missing?

On Jun 7, 2007, at 3:16 AM, Wolfgang Schuster wrote:
...
On Wed, 06 Jun 2007 19:42:26 -0400
Aditya Mahajan  wrote:
...
Hi,
How can I make \framed ignore the width of the rule? I am trying to
typeset internet protocol headers, but I cannot fully get what I  
want.
Here is my attempt:
\unprotect
\makecounter{v!protocolheaderlength}
\defineframed[protocolfieldheader]
             [location=lohi,height=3 
\lineheight,offset=none,strut=yes]
\def\startprotocolheader
  {\dodoubleempty\dostartprotocolheader}
\def\dostartprotocolheader[#1][#2]%
  {\getparameters[c!protocol][#1]%
   \let\field\protocolheaderfield
   \resetcounter{v!protocolheaderlength}%
   \vbox\bgroup
%    \ruledvbox\bgroup
   \removeunwantedspaces
   \dontleavehmode
   \protocolfieldheader[frame=on,width=\c!protocolbits\c! 
protocolunitsize]%
\protocolfieldheader[frame=on,width=\dimexpr\c!protocolunitsize* 
\c!protocolbits\relax]%
...
{\let\\\crlf\bold #2}\crlf}
\def\stopprotocoloheader
  {\egroup}
\def\protocolheaderfield#1#2%
  {\doif{\countervalue{v!protocolheaderlength}}{\c!protocolbits}
   {\resetcounter{v!protocolheaderlength}\crlf}%
   \removeunwantedspaces
   \dontleavehmode
   \protocolfieldheader[width=#1\c!protocolunitsize]{\let\\\crlf #2 
\\(#1)}%
\protocolfieldheader[width=\dimexpr\c!protocolunitsize*#1\relax] 
{\let\\\crlf #2\\(#1)}%
...
\incrementcounter{v!protocolheaderlength}{#1}}
\protect
% \showstruts
% \showboxes
\starttext
% Why should unitsize=1mm. Are things being scaled by another factor?
\startprotocolheader[bits=16,unitsize=1mm][General MAC Headers]
\startprotocolheader[bits=16,unitsize=1cm][General MAC Headers]
...
\field    {1}   {HT}
  \field    {1}   {EC}
  \field    {6}   {Type}
  \field    {1}   {ESF}
  \field    {1}   {CI}
  \field    {2}   {EKS}
  \field    {1}   {Rsv}
  \field    {3}   {LEN MSB}
  \field    {8}   {LEN LSB}
  \field    {8}   {CID MSB}
  \field    {8}   {CID LSB}
  \field    {8}   {HCS}
\stopprotocoloheader
\stoptext
Notice that all the lines are not of the same size. It seems that the
rules of framed are causing the frame to be of a larger width.
Also am I missing a scaling factor in width= expressions above.
Everything looks fine with unitsize=1mm, but the final figure is
clearly larger than 16mm. I am confused as to what is happening.
Is there any better way to do this?
Thanks,
Aditya
Hi Aditya,
you wanted something like this
\newdimen\scale \scale\1mm
\def\rule#1{\hrule width #1\scale}
\rule{10}
but you made this
\def\scale{1mm}
\def\rule#1{\hrule width #1\scale}
\rule{10}
The length of the \hrule in the first example is 10pt (10 \times  
1pt = 10pt),
while in the second example it is 101pt width (10 & 1pt = 101pt).
Wolfgang
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Re: [NTG-context] How to make \framed ignore the width of the rule

David Arnold