Re: title settings

[Hans Hagen <pragma@wxs.nl>]

On 17-10-2010 1:20, Herbert Voss wrote:
> If I understand the documentations correct, then
> the first command should set _all_ titles to
> slanted except the subsection. When I run
> this example the titles are always upright.
>
>
> \setupheads[textstyle=slanted]
> \setuphead[part][placehead=yes,color=blue]
> \setuphead[subsection][numberstyle=bold,textstyle=cap]
>
> \starttext
> \part{Teilebene}
> \chapter{Kapitelebene}
> \section{Abschnittsebene 1}
> \subsection{Abschnittsebene 2}
> \subsubsection{Abschnittsebene 3}
> \stoptext
>
> running TeXLive2010 with mkiv

Heads indeed inherit from parents with the root being \setupheads, but 
with a few exeptions. The definition deep down is:

\unexpanded\def\definestructuresection[#1]%
  {....
   \getparameters[\??nh#1]
     [  \c!textstyle=\structureheadparameterstrict\c!style,
        \c!textcolor=\structureheadparameterstrict\c!color,
      \c!numberstyle=\structureheadparameterstrict\c!style,
      \c!numbercolor=\structureheadparameterstrict\c!color]%
   ....}

So, the explicit style and color variables have a more resticted 
inheritance, that does not backtrack.

The reasons for this are a bit fuzzy and lays in the fact that we also 
have style and color keys and if we would inherit this would mean that 
one should nil the explicit text and number ones quite often.

So, text* and number* are bound to the current section level which means 
that you can set up all (cloned) sections, subsections etc at once but 
the setting does not bleed to other levels unless of course that is 
somehow configured.

In practice, I often use style and color for setting both and then 
textstyle and numberstyle if there is an exception. This permits things 
like:

style={\switchtobodyfont[10pt]},textstyle=bold,numberstyle=slanted

In such cases the spacing is style driven which makes sense (I hope).

Hans




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