Re: Question to covers

Re: Question to covers

[Henning Hraban Ramm]

Am 2018-07-28 um 10:12 schrieb Tomas Hala <tomas.hala@mendelu.cz>:

> Hi Hraban, Wolfgang and Hans,
> nobody else reacted so I am writing 

Better keep this on the list.

> Thanks to Hraban for the code and Wolfgang for its revision, it's a good
> material how to work with layers, measures  (I'll inspire by it) etc.

You’re welcome.

> 1. Is a ConTeXt layer accepted as a whole in commercial Acrobat, or is it
> visible as a heap of small objects? Or is it "only" better for more
> comfortable manipulation in ConTeXt?

I don’t understand the question.
A ConTeXt layer is not a PDF layer.
All the objects are manipulatable in Acrobat Pro (or another PDF editor),
there’s no grouping on the PDF level.

> 2. Is better to write it as much as possible at ConTeXt level (as Hraban or
> Wolfgang did), or is better to write it in lua? There is more than dozen
> measures... Also more computations are required and they are different
> for different kinds of covers (book bindings).

I guess it’s a matter of taste.
Of course calculations are easier in Lua, but in my image placement macros
I struggled a lot with numbers vs. measures/dimensions, regardless if in Lua
or on the TeX level.


Greetlings, Hraban
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Re: Question to covers

[Henning Hraban Ramm]

Am 2018-07-28 um 11:15 schrieb Henning Hraban Ramm <texml@fiee.net>:

> Am 2018-07-28 um 10:12 schrieb Tomas Hala <tomas.hala@mendelu.cz>:
>> 1. Is a ConTeXt layer accepted as a whole in commercial Acrobat, or is it
>> visible as a heap of small objects? Or is it "only" better for more
>> comfortable manipulation in ConTeXt?
> 
> I don’t understand the question.
> A ConTeXt layer is not a PDF layer.
> All the objects are manipulatable in Acrobat Pro (or another PDF editor),
> there’s no grouping on the PDF level.

If you need PDF layers, there are "viewer layers" in ConTeXt:

\defineviewerlayer[Ebene]
\setupviewerlayer[Ebene][
  state=start,
  visible=no,
  title=Test,
]

\starttext

Text

\startviewerlayer[Ebene]
{\bfa TOP SECRET}
\stopviewerlayer

More Text

\stoptext

AFAIK completely undocumented, I found them at http://source.contextgarden.net/tex/context/base/mkiv/attr-lay.mkiv
while tracking effects/properties (where these were implemented first).

While the example above works, I don’t get viewer layers in my current project, must investigate...
And then, if the combination of ConTeXt layers and viewer layers works (\setlayer within \start/stopviewerlayer?).


Greetlings, Hraban
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Re: Question to covers

[Wolfgang Schuster]

Henning Hraban Ramm schrieb am 28.07.18 um 12:01:
> Am 2018-07-28 um 11:15 schrieb Henning Hraban Ramm <texml@fiee.net>:
>
>> Am 2018-07-28 um 10:12 schrieb Tomas Hala <tomas.hala@mendelu.cz>:
>>> 1. Is a ConTeXt layer accepted as a whole in commercial Acrobat, or is it
>>> visible as a heap of small objects? Or is it "only" better for more
>>> comfortable manipulation in ConTeXt?
>> I don’t understand the question.
>> A ConTeXt layer is not a PDF layer.
>> All the objects are manipulatable in Acrobat Pro (or another PDF editor),
>> there’s no grouping on the PDF level.
> If you need PDF layers, there are "viewer layers" in ConTeXt:
>
> \defineviewerlayer[Ebene]
> \setupviewerlayer[Ebene][
>    state=start,
>    visible=no,
>    title=Test,
> ]
>
> \starttext
>
> Text
>
> \startviewerlayer[Ebene]
> {\bfa TOP SECRET}
> \stopviewerlayer
>
> More Text
>
> \stoptext
>
> AFAIK completely undocumented, I found them at http://source.contextgarden.net/tex/context/base/mkiv/attr-lay.mkiv
> while tracking effects/properties (where these were implemented first).
>
> While the example above works, I don’t get viewer layers in my current project, must investigate...
> And then, if the combination of ConTeXt layers and viewer layers works (\setlayer within \start/stopviewerlayer?).

You have to put the viewerlayer command within the the \setlayer argument.

Wolfgang
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Re: Viewer layers (was: Question to covers)

[Henning Hraban Ramm]

Am 2018-07-28 um 12:30 schrieb Wolfgang Schuster <wolfgang.schuster.lists@gmail.com>:
>> AFAIK completely undocumented, I found them at http://source.contextgarden.net/tex/context/base/mkiv/attr-lay.mkiv
>> while tracking effects/properties (where these were implemented first).
>> 
>> While the example above works, I don’t get viewer layers in my current project, must investigate...
>> And then, if the combination of ConTeXt layers and viewer layers works (\setlayer within \start/stopviewerlayer?).
> 
> You have to put the viewerlayer command within the the \setlayer argument.

Thank you! I just found it in
http://source.contextgarden.net/tex/context/base/mkiv/meta-ini.mkiv?search=viewerlayer

Also created a wiki page: http://wiki.contextgarden.net/Viewer_Layers

I still don’t get layers working in my big project. Thought it might be "scope=global", but that didn’t help.
Are there any settings that might influence viewer layers?

Greetlings, Hraban
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