Highlight current chapter in list

Highlight current chapter in list

[Marco Patzer]

Hi!

How do I highlight the current chapter in the table of contents? The
TOC is displayed on each page. For illustration I misused the
interaction colour, which of course only works for the first page of
a chapter.

  \setupheadertexts
    [\setups{headlist}]

  \startsetups [headlist]
    \framed[align=normal, frame=off]
      {\placelist [chapter] [alternative=f, criterium=all]}
  \stopsetups

  \setupinteraction
    [state=start,
     color=lightgray,
     contrastcolor=darkgreen]

  \starttext
    \startchapter [title=alpha]                   \stopchapter
    \startchapter [title=beta]  \page\input knuth \stopchapter
    \startchapter [title=gamma]                   \stopchapter
  \stoptext


Marco

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___________________________________________________________________________________

Re: Highlight current chapter in list

[Wolfgang Schuster]

Am 08.11.2012 um 00:29 schrieb Marco Patzer <homerow@lavabit.com>:

> Hi!
> 
> How do I highlight the current chapter in the table of contents? The
> TOC is displayed on each page. For illustration I misused the
> interaction colour, which of course only works for the first page of
> a chapter.
> 
>  \setupheadertexts
>    [\setups{headlist}]
> 
>  \startsetups [headlist]
>    \framed[align=normal, frame=off]
>      {\placelist [chapter] [alternative=f, criterium=all]}
>  \stopsetups
> 
>  \setupinteraction
>    [state=start,
>     color=lightgray,
>     contrastcolor=darkgreen]
> 
>  \starttext
>    \startchapter [title=alpha]                   \stopchapter
>    \startchapter [title=beta]  \page\input knuth \stopchapter
>    \startchapter [title=gamma]                   \stopchapter
>  \stoptext


You can use the marking mechanism to get the title of the current chapter.

The problem for the solution below is to get a expandable version of the
list entry because \currentlistentrytitle itself isn’t expandable and can’t
be used in \doifelse. Instead of using \ctxcommand better ask Hans for
a raw/expandable version of the tile/pagenumber commands.

\setupheadertexts
  [\setups{headlist}]

\startsetups [headlist]
  \framed[align=normal, frame=off]
    {\placelist [chapter] [alternative=highlight, criterium=all]}
\stopsetups

\definelistalternative
  [highlight]
  [renderingsetup=list:highlight]

\startsetups [list:highlight]
  \par
  \startlinealignment[middle]
    \doifelse{\fetchmark[chapter][first]}{\currentlistentrytitle}
   %\doifelse{\fetchmark[chapter][first]}{\ctxcommand{listtitle("\currentlist",\currentlistindex)}}
      {\color[red] {\currentlistentrytitle}}
      {\color[blue]{\currentlistentrytitle}}
  \stoplinealignment
  \par
\stopsetups

\setupinteraction
  [state=start,
   color=lightgray,
   contrastcolor=darkgreen]

\starttext
  \startchapter [title=alpha]                   \stopchapter
  \startchapter [title=beta]  \page\input knuth \stopchapter
  \startchapter [title=gamma]                   \stopchapter
\stoptext

Wolfgang
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___________________________________________________________________________________

Re: Highlight current chapter in list

[Marco Patzer]

2012-11-08 Wolfgang Schuster:

Hi Wolfgang!

> \startsetups [headlist]
>   \framed[align=normal, frame=off]
>     {\placelist [chapter] [alternative=highlight, criterium=all]}
> \stopsetups
> 
> \definelistalternative
>   [highlight]
>   [renderingsetup=list:highlight]

I like the flexibility of renderingsetups for \defineheadalternative,
but frankly, I didn't know they can be used for lists as well and
I was clueless about the best place to hook into.

> \startsetups [list:highlight]
>   \par
>   \startlinealignment[middle]
>     \doifelse{\fetchmark[chapter][first]}{\currentlistentrytitle}
>    %\doifelse{\fetchmark[chapter][first]}{\ctxcommand{listtitle("\currentlist",\currentlistindex)}}
>       {\color[red] {\currentlistentrytitle}}
>       {\color[blue]{\currentlistentrytitle}}
>   \stoplinealignment
>   \par
> \stopsetups

That's a neat and clean solution. Thanks Wolfgang.


Marco

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___________________________________________________________________________________

Re: Highlight current chapter in list

[Hans Hagen]

On 11/8/2012 11:06 AM, Marco Patzer wrote:
> 2012-11-08 Wolfgang Schuster:
>
> Hi Wolfgang!
>
>> \startsetups [headlist]
>>    \framed[align=normal, frame=off]
>>      {\placelist [chapter] [alternative=highlight, criterium=all]}
>> \stopsetups
>>
>> \definelistalternative
>>    [highlight]
>>    [renderingsetup=list:highlight]
>
> I like the flexibility of renderingsetups for \defineheadalternative,
> but frankly, I didn't know they can be used for lists as well and
> I was clueless about the best place to hook into.
>
>> \startsetups [list:highlight]
>>    \par
>>    \startlinealignment[middle]
>>      \doifelse{\fetchmark[chapter][first]}{\currentlistentrytitle}
>>     %\doifelse{\fetchmark[chapter][first]}{\ctxcommand{listtitle("\currentlist",\currentlistindex)}}
>>        {\color[red] {\currentlistentrytitle}}
>>        {\color[blue]{\currentlistentrytitle}}
>>    \stoplinealignment
>>    \par
>> \stopsetups
>
> That's a neat and clean solution. Thanks Wolfgang.


Wolfgang:

Say that we have:

\installcorenamespace{internalreference}

\def\structureheadlocation#1%
 
{\csname\??internalreference\ifcsname\??internalreference#1\endcsname#1\else\s!default\fi\endcsname}

\letvalue{\??internalreference\s!default}\!!zerocount

\def\storeinternalreference#1#2%
   {\setxvalue{\??internalreference\currentstructurename}{#2}}

and in \strc_sectioning_register add:

\storeinternalreference\currentstructurename\nextinternalreference

then we can say:

\startsetups [list:highlight]
   \par
   \startlinealignment[middle]
   \doifelse\currentlistentrylocation{\structureheadlocation{chapter}}
       {\color[red] {\currentlistentrytitle}}
       {\color[blue]{\currentlistentrytitle}}
   \stoplinealignment
   \par
\stopsetups

which is just comparing numbers (so one can also say:

\startsetups [list:highlight]
   \par
   \startlinealignment[middle]
   \ifnum\currentlistentrylocation=\structureheadlocation{chapter}\relax
       \color[red] {\currentlistentrytitle}
   \else
       \color[blue]{\currentlistentrytitle}
   \fi
   \stoplinealignment
   \par
\stopsetups

but that's for low level coders)

Hans



-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: Highlight current chapter in list

[Hans Hagen]

On 11/8/2012 12:06 PM, Hans Hagen wrote:
> On 11/8/2012 11:06 AM, Marco Patzer wrote:
>> 2012-11-08 Wolfgang Schuster:
>>
>> Hi Wolfgang!
>>
>>> \startsetups [headlist]
>>>    \framed[align=normal, frame=off]
>>>      {\placelist [chapter] [alternative=highlight, criterium=all]}
>>> \stopsetups
>>>
>>> \definelistalternative
>>>    [highlight]
>>>    [renderingsetup=list:highlight]
>>
>> I like the flexibility of renderingsetups for \defineheadalternative,
>> but frankly, I didn't know they can be used for lists as well and
>> I was clueless about the best place to hook into.
>>
>>> \startsetups [list:highlight]
>>>    \par
>>>    \startlinealignment[middle]
>>>      \doifelse{\fetchmark[chapter][first]}{\currentlistentrytitle}
>>>
>>> %\doifelse{\fetchmark[chapter][first]}{\ctxcommand{listtitle("\currentlist",\currentlistindex)}}
>>>
>>>        {\color[red] {\currentlistentrytitle}}
>>>        {\color[blue]{\currentlistentrytitle}}
>>>    \stoplinealignment
>>>    \par
>>> \stopsetups
>>
>> That's a neat and clean solution. Thanks Wolfgang.

the next beta has: \namedstructureheadlocation{name}

so that you can compare

   \currentlistentrylocation

with

   \namedstructureheadlocation{chapter}

(todo: also store locations elsewhere?)

Best document this before we forget about it.

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
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___________________________________________________________________________________

Re: Highlight current chapter in list

[Marco Patzer]

2012-11-08 Hans Hagen:

> the next beta has: \namedstructureheadlocation{name}
> 
> so that you can compare
> 
>    \currentlistentrylocation
> 
> with
> 
>    \namedstructureheadlocation{chapter}

Thanks Hans.

> Best document this before we forget about it.

I assume that's my part, right? I'll extend or add a wiki page the
weekend after the beta is released.


Marco

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___________________________________________________________________________________

Re: Highlight current chapter in list

[Marco Patzer]

2012-11-08 Marco Patzer:

> > Best document this before we forget about it.
> 
> I assume that's my part, right? I'll extend or add a wiki page the
> weekend after the beta is released.

http://wiki.contextgarden.net/Command/definelistalternative


Marco

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___________________________________________________________________________________

Re: Highlight current chapter in list

[Hans Hagen]

On 11/8/2012 6:32 PM, Marco Patzer wrote:
> 2012-11-08 Marco Patzer:
>
>>> Best document this before we forget about it.
>>
>> I assume that's my part, right? I'll extend or add a wiki page the
>> weekend after the beta is released.
>
> http://wiki.contextgarden.net/Command/definelistalternative

fyi: more commands will support a redering setup approach

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________

Re: Highlight current chapter in list

[Marco Patzer]

2012-11-08 Wolfgang Schuster:

> \setupheadertexts
>   [\setups{headlist}]
> 
> \startsetups [headlist]
>   \framed[align=normal, frame=off]
>     {\placelist [chapter] [alternative=highlight, criterium=all]}
> \stopsetups
> 
> \definelistalternative
>   [highlight]
>   [renderingsetup=list:highlight]

Why does the custom list alternative succeed in a header but fails
in a layer? A predefined alternative works perfectly in a layer.

  \setupfootertexts
    [\setups{footlist}]

  \setupbackgrounds
    [page]
    [background=layer:chapter]

  \definelayer
    [layer:chapter]
    [state=repeat]

  \setlayer
    [layer:chapter]
    {\placelist [chapter] [alternative=f, criterium=all]}            %% works
    %% {\placelist [chapter] [alternative=highlight, criterium=all]} %% fails

  \definelistalternative
    [highlight]
    [renderingsetup=list:highlight]

  \startsetups [list:highlight]
    \currentlistentrytitle
  \stopsetups

  %% works
  \startsetups [footlist]
    \placelist [chapter] [alternative=highlight, criterium=all]
  \stopsetups

  \starttext
    \startchapter [title=Alpha] \stopchapter
    \startchapter [title=Beta]  \stopchapter
    \startchapter [title=Gamma] \stopchapter
  \stoptext


Marco

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___________________________________________________________________________________

Re: Highlight current chapter in list

[Marco Patzer]

2012-11-08 Marco Patzer:

I just realized when I presses “send”:

> Why does the custom list alternative succeed in a header but fails
> in a layer? A predefined alternative works perfectly in a layer.
> 
>   \setupfootertexts
>     [\setups{footlist}]
> 
>   \setupbackgrounds
>     [page]
>     [background=layer:chapter]

\setupbackgrounds
  [page]
  [background=layer:chapter, setups=setups:headlayer]

>   \setlayer
>     [layer:chapter]
>     {\placelist [chapter] [alternative=f, criterium=all]}            %% works
>     %% {\placelist [chapter] [alternative=highlight, criterium=all]} %% fails

\startsetups [setups:headlayer]
  \setlayer
    [layer:chapter]
    {\placelist [chapter] [alternative=highlight, criterium=all]}
\stopsetups

Well, we have dynamic content, so wrap it in a setup.


Marco

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Re: Highlight current chapter in list

[Wolfgang Schuster]

Am 08.11.2012 um 22:37 schrieb Marco Patzer <homerow@lavabit.com>:

> 2012-11-08 Wolfgang Schuster:
> 
>> \setupheadertexts
>>  [\setups{headlist}]
>> 
>> \startsetups [headlist]
>>  \framed[align=normal, frame=off]
>>    {\placelist [chapter] [alternative=highlight, criterium=all]}
>> \stopsetups
>> 
>> \definelistalternative
>>  [highlight]
>>  [renderingsetup=list:highlight]
> 
> Why does the custom list alternative succeed in a header but fails
> in a layer? A predefined alternative works perfectly in a layer.

Header and footers are added and calculated after the page is finished
but when you put a text in a layer it is fixed at this moment.

The problem in your example with the custom list alternative is that
you haven’t defined it when it is needed, when you put \definelistalternative
and \startsetups … \stopsetups before \setlayer you can see it.

For a dynamic layer take a look at this wiki page: http://wiki.contextgarden.net/Layers#Use_dynamic_content

Wolfgang
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Re: Highlight current chapter in list

[Hans Hagen]

On 11/8/2012 10:48 PM, Wolfgang Schuster wrote:
>
> Am 08.11.2012 um 22:37 schrieb Marco Patzer <homerow@lavabit.com>:
>
>> 2012-11-08 Wolfgang Schuster:
>>
>>> \setupheadertexts
>>>   [\setups{headlist}]
>>>
>>> \startsetups [headlist]
>>>   \framed[align=normal, frame=off]
>>>     {\placelist [chapter] [alternative=highlight, criterium=all]}
>>> \stopsetups
>>>
>>> \definelistalternative
>>>   [highlight]
>>>   [renderingsetup=list:highlight]
>>
>> Why does the custom list alternative succeed in a header but fails
>> in a layer? A predefined alternative works perfectly in a layer.
>
> Header and footers are added and calculated after the page is finished
> but when you put a text in a layer it is fixed at this moment.
>
> The problem in your example with the custom list alternative is that
> you haven’t defined it when it is needed, when you put \definelistalternative
> and \startsetups … \stopsetups before \setlayer you can see it.
>
> For a dynamic layer take a look at this wiki page: http://wiki.contextgarden.net/Layers#Use_dynamic_content

here is another variant:

\defineoverlay[pagenumber:preset][\texsetup{pagenumber:preset}]

\startsetups pagenumber:preset
     PRESET
\stopsetups

\defineoverlay[pagenumber:action][\texsetup{pagenumber:action}]

\startsetups pagenumber:action
     ACTION
\stopsetups

\setupbackgrounds
   [page]
   [background={pagenumber:preset,pagenumber:action}]

\starttext
     \dorecurse{4}{\page[empty]}
\stoptext

(just to illustrate that an overlay can be used for anything)

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Tikz backgrounds (was Re: Highlight current chapter in list)

[Aditya Mahajan]

On Thu, 8 Nov 2012, Hans Hagen wrote:

> (just to illustrate that an overlay can be used for anything)

This prompted me to finish testing what I had been thinking about for a 
while.

In most cases, metapost is sufficient for drawing backgrounds, but 
occasionally using tikz is nicer. For example, when tikz provides a 
solution that is not available in metapost (e.g., drawing "snake" paths), 
or extremely difficult to get right in metapost (drawing shadows).

As Hans said, overlays can be used for anything, including tikz 
background. Here is a proof of concept implementation:

\usemodule[tikz]
\usetikzlibrary[decorations.pathmorphing]

\def\TIKZdecorationoverlay
     {\starttikzpicture
         \expanded{\draw[\overlaylinecolor, line width=\overlaylinewidth,
               decorate, decoration={\framedparameter{decoration}}]
               (0,0)--(\overlaywidth,0) --
               (\overlaywidth,\overlayheight) -- (0,\overlayheight) -- cycle;}
      \stoptikzpicture}

\defineoverlay[decoration][\TIKZdecorationoverlay]

\setupframed
   [decoration=snake]

\starttext

\framed[frame=off, rulethickness=3bp, background=decoration,
          backgroundoffset=3mm, framecolor=red, align=normal]
          {\input ward \endgraf}

\blank[2*big]

\externalfigure
   [cow]
   [frame=off, frameoffset=5pt, backgroundoffset=frame,
   background=decoration,
   decoration={coil, amplitude=4pt, segment length=5pt}]

\stoptext

Aditya
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___________________________________________________________________________________

Re: Tikz backgrounds (was Re: Highlight current chapter in list)

[Hans Hagen]

On 11/9/2012 1:43 AM, Aditya Mahajan wrote:

> \externalfigure
>    [cow]
>    [frame=off, frameoffset=5pt, backgroundoffset=frame,
>    background=decoration,
>    decoration={coil, amplitude=4pt, segment length=5pt}]

how about a namespace:

decoration:spec={coil, amplitude=4pt, segment length=5pt}]

or so, i.e. avoid a clash with (potentially new) keys

Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: Highlight current chapter in list

[Sietse Brouwer]

Hans wrote:
> the next beta has: \namedstructureheadlocation{name}
> so that you can compare
>   \currentlistentrylocation
> with
>   \namedstructureheadlocation{chapter}
> (todo: also store locations elsewhere?)
> Best document this before we forget about it.

Is this a good description of the command's behavior?

All structure heads, regardless of level, get a location number in the
order in which they appear. Like so (see also MWE at bottom of this
e-mail):

\section{Alpha}
    % location number: 1; type: section; section number: 1
\section{Beta}
    % location number: 2; type: section; section number: 2
\subsection{Aap}
    % location number: 3; type: subsection; subsection number: 1
\subsection{Noot}
    % location number: 4; type: subsection; subsection number: 2
\section{Gamma}
    % location number: 5; type: section; section number: 3

\namedstructureheadlocation{X} then returns the location number of the
current X, where X is the name of a structure level (e.g. 'chapter',
'section', etc.)

If you ask for e.g. \namedstructureheadlocation{chapter}, and you are
not in a chapter, then 0 is returned.

Anything missing?

@Marco: sweet job on
http://wiki.contextgarden.net/Command/definelistalternative. I have
taken the lazy liberty of redirecting
Command/currentlistentrylocation
Command/structureheadlocation
Command/currentlistentrynumber
etc to that page for the now, so that they at least appear in the list
of commands.

--Sietse

\starttext
  \startsection [title=alpha]
  \stopsection
  \startsection [title=beta]
    \startsubsection[title=aap]
        \namedstructureheadlocation{section}
        \namedstructureheadlocation{subsection}
    \startsubsection[title=noot]
        \namedstructureheadlocation{section}
        \namedstructureheadlocation{subsection}
    \stopsubsection
  \stopsection
  \startsection [title=gamma]
        \namedstructureheadlocation{section}
  \stopsection
\stoptext
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___________________________________________________________________________________

Re: Highlight current chapter in list

[Hans Hagen]

On 11/9/2012 5:53 PM, Sietse Brouwer wrote:
> Hans wrote:
>> the next beta has: \namedstructureheadlocation{name}
>> so that you can compare
>>    \currentlistentrylocation
>> with
>>    \namedstructureheadlocation{chapter}
>> (todo: also store locations elsewhere?)
>> Best document this before we forget about it.
>
> Is this a good description of the command's behavior?
>
> All structure heads, regardless of level, get a location number in the
> order in which they appear. Like so (see also MWE at bottom of this
> e-mail):
>
> \section{Alpha}
>      % location number: 1; type: section; section number: 1
> \section{Beta}
>      % location number: 2; type: section; section number: 2
> \subsection{Aap}
>      % location number: 3; type: subsection; subsection number: 1
> \subsection{Noot}
>      % location number: 4; type: subsection; subsection number: 2
> \section{Gamma}
>      % location number: 5; type: section; section number: 3
>
> \namedstructureheadlocation{X} then returns the location number of the
> current X, where X is the name of a structure level (e.g. 'chapter',
> 'section', etc.)
>
> If you ask for e.g. \namedstructureheadlocation{chapter}, and you are
> not in a chapter, then 0 is returned.
>
> Anything missing?

a location number is some kind of unique internal reference, a pretty 
old feature btw, dating from the early days of context, when complex 
interactivity was added, but it comes in handy here

Hans


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