Re: [NTG-context] layout parameter testing

14 Nov 2008

      Am 14.11.2008 um 15:06 schrieb Alan STONE:
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On Thu, Nov 13, 2008 at 9:48 PM, Wolfgang Schuster 
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wrote:
Am 13.11.2008 um 20:52 schrieb Alan STONE:
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Hi,
With \definelayout[myLayout][...], how do you test whether one of
its parameters has a certain value, is greater than 0, etc... ?
\definelayout
  [mylayout]
  [backspace=3cm,
   width=12cm]
\starttext
\doifdimensionelse{\namedlayoutparameter{mylayout}{width}} % width
could be 'fit'
  {\ifdim\namedlayoutparameter{mylayout}{width}<10cm
     ...
   \else
     ...
   \fi}
  {\processaction
     [\namedlayoutparameter{mylayout}{width}]
     [fit=>...,
      unknown=>...]}
\stoptext
Re: http://wiki.contextgarden.net/System_Macros/Action_Processing
What is 'fit' ?
You could set the the width of the textarea in
three different ways:

1) as absolute value,

2) as remaining space between backspace and cutspace
    (useful in presentations) and

3) as remaining space between equal margins.

\definelayout[1][backspace=4cm,width=12cm]
\definelayout[2][backspace=5cm,cutspace=7cm,width=fit]
\definelayout[3][backspace=3cm,width=middle]

\showframe

\starttext

\dorecurse{3}
   {\starttabulate
    \NC backspace \EQ \PtToCm\backspace \NC\NR
    \NC textwidth \EQ \PtToCm\textwidth \NC\NR
    \NC cutspace  \EQ \PtToCm\cutspace  \NC\NR
    \stoptabulate
    \page}

\stoptext

Regards,
Wolfgang