No output for layers

No output for layers

[Oliver Buerschaper]

Dear all,

somehow the following won't produce any PDF output:

---
\definelayer
	[mylayer]
	[x=78mm,
	 y=3mm,
	 height=43.5mm,
	 width=128mm]

\starttext

\setlayer[mylayer][preset=middle]{Hello world!}

\stoptext
---

Any ideas?

Oliver
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___________________________________________________________________________________

Re: No output for layers

[Wolfgang Schuster]

On Tue, Jul 8, 2008 at 2:17 PM, Oliver Buerschaper
<oliver.buerschaper@mpq.mpg.de> wrote:
> Dear all,
>
> somehow the following won't produce any PDF output:
>
> ---
> \definelayer
>        [mylayer]
>        [x=78mm,
>         y=3mm,
>         height=43.5mm,
>         width=128mm]
>
> \starttext
>
> \setlayer[mylayer][preset=middle]{Hello world!}
>
> \stoptext
> ---
>
> Any ideas?

\flushlayer{mylayer}

or

\setupbackgrounds[text|page|...][background=mylayer]

Wolfgang
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___________________________________________________________________________________

Re: No output for layers

[Wolfgang Schuster]

On Tue, Jul 8, 2008 at 2:17 PM, Oliver Buerschaper
<oliver.buerschaper@mpq.mpg.de> wrote:
> Dear all,
>
> somehow the following won't produce any PDF output:
>
> ---
> \definelayer
>        [mylayer]
>        [x=78mm,
>         y=3mm,
>         height=43.5mm,
>         width=128mm]
>
> \starttext
>
> \setlayer[mylayer][preset=middle]{Hello world!}
>
> \stoptext
> ---
>
> Any ideas?
>
> Oliver

You have to invoke the OTR.

You could use

\startstandardmakeup
\stopstandardmakeup

or

\page[empty]

or

\dontleavehmode

or

\null

or

...

Wolfgang
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___________________________________________________________________________________

Re: No output for layers

[Wolfgang Schuster]

On Tue, Jul 8, 2008 at 2:24 PM, Wolfgang Schuster
<schuster.wolfgang@googlemail.com> wrote:
> On Tue, Jul 8, 2008 at 2:17 PM, Oliver Buerschaper
> <oliver.buerschaper@mpq.mpg.de> wrote:
>> Dear all,
>>
>> somehow the following won't produce any PDF output:
>>
>> ---
>> \definelayer
>>        [mylayer]
>>        [x=78mm,
>>         y=3mm,
>>         height=43.5mm,
>>         width=128mm]
>>
>> \starttext
>>
>> \setlayer[mylayer][preset=middle]{Hello world!}
>>
>> \stoptext
>> ---
>>
>> Any ideas?
>
> \flushlayer{mylayer}

\flushlayer[mylayer]

> or
>
> \setupbackgrounds[text|page|...][background=mylayer]

Wolfgang
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___________________________________________________________________________________

Re: No output for layers

[Oliver Buerschaper]

> \flushlayer[mylayer]

Yes, that's it! Thanks a lot …

Do you perhaps also know how to draw a frame around the layer  
boundary? The command \setlayerframed only seems to encapsulate the  
actual content with a frame …

Oliver
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Re: No output for layers

[Wolfgang Schuster]

On Tue, Jul 8, 2008 at 2:54 PM, Oliver Buerschaper
<oliver.buerschaper@mpq.mpg.de> wrote:
>> \flushlayer[mylayer]
>
> Yes, that's it! Thanks a lot …
>
> Do you perhaps also know how to draw a frame around the layer
> boundary? The command \setlayerframed only seems to encapsulate the
> actual content with a frame …

Can you be more concrete, what do you mean by boundry oround the layer.

Wolfgang
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Re: No output for layers

[Oliver Buerschaper]

>> Do you perhaps also know how to draw a frame around the layer
>> boundary? The command \setlayerframed only seems to encapsulate the
>> actual content with a frame …
>
> Can you be more concrete, what do you mean by boundry oround the  
> layer.

I'm thinking of a frame that visualizes the actual drawable rectangle  
of the layer … that is, for

\definelayer
	[mylayer]
	[x=78mm,
	 y=3mm,
	 height=43.5mm,
	 width=128mm]

I would like a frame to be drawn around the box whose dimensions and  
location on the page are specified by x, y, height and width. I'd also  
be fine if this area could be shaded with some background colour.

With \setlayerframed I seem to only get a frame which fits the actual  
content snugly, e.g. if I draw the text "Hello world" into the layer  
then a small frame will be drawn around this text only and not around  
the entire layer box …

See what I mean?

Oliver
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Re: No output for layers

[Wolfgang Schuster]

On Tue, Jul 8, 2008 at 3:19 PM, Oliver Buerschaper
<oliver.buerschaper@mpq.mpg.de> wrote:
>>> Do you perhaps also know how to draw a frame around the layer
>>> boundary? The command \setlayerframed only seems to encapsulate the
>>> actual content with a frame …
>>
>> Can you be more concrete, what do you mean by boundry oround the
>> layer.
>
> I'm thinking of a frame that visualizes the actual drawable rectangle
> of the layer … that is, for
>
> \definelayer
>        [mylayer]
>        [x=78mm,
>         y=3mm,
>         height=43.5mm,
>         width=128mm]
>
> I would like a frame to be drawn around the box whose dimensions and
> location on the page are specified by x, y, height and width. I'd also
> be fine if this area could be shaded with some background colour.
>
> With \setlayerframed I seem to only get a frame which fits the actual
> content snugly, e.g. if I draw the text "Hello world" into the layer
> then a small frame will be drawn around this text only and not around
> the entire layer box …

Set the values with \setlayer and not with \definelayer.

> See what I mean?

\definelayer
  [mylayer]

\starttext

\setlayerframed
  [mylayer]
  [x=78mm,
   y=3mm,
   height=43.5mm,
   width=68mm]
  {framed layer}

\flushlayer[mylayer]

\stoptext

Wolfgang
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Re: No output for layers

[Uwe Koloska]

Hello,

Am Dienstag, 8. Juli 2008 schrieb Wolfgang Schuster:
> Set the values with \setlayer and not with \definelayer.

But then you can't use 'preset=middle' cause this relies on the actual 
dimensions of the layer. So if you wanna use placements relative to the right 
or bottom side of the layer you have to provide the position and dimensions 
with \definelayer.

Regards
Uwe
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Re: No output for layers

[Uwe Koloska]

Hello,

Am Dienstag, 8. Juli 2008 schrieb Wolfgang Schuster:
> On Tue, Jul 8, 2008 at 2:17 PM, Oliver Buerschaper
> > ---
> > \definelayer
> >        [mylayer]
> >        [x=78mm,
> >         y=3mm,
> >         height=43.5mm,
> >         width=128mm]
> >
> > \starttext
> >
> > \setlayer[mylayer][preset=middle]{Hello world!}
> >
> > \stoptext
> > ---

The layer is now only defined and has some content, but is not related to any 
page element. So you has to define it as the background of some pageelement:

  \setupbackgrounds[page][background=mylayer]

or you have to "flush" it (but I don't know what this is supposed to do, maybe 
it's just another way of calling the OTR -- see below)

  \flushlayer[mylayer]

> You have to invoke the OTR.

OTR = Output Routine

Without invoking the OTR nothing is generated.

(but you can leave out \starttext \stoptext -- why?)

> You could use
>
> \startstandardmakeup
> \stopstandardmakeup
>
> or
>
> \page[empty]

Both of these produce an empty page (without pagenumber) and the layer at the 
intended position.

> or
>
> \dontleavehmode
>
> or
>
> \null
>
> or

These two variants produce pages with the standard layout (in this easy setup 
this consists only of the page number at the top).

The last alternative I know of: instead of defining the layer as background 
for the page, you can just call

  \flushlayer[mylayer]

But this positions the layer relative to the textarea (and not the pagearea) 
and produces a standard layout with pagenumber, too, if you don't use 
standardmakeup.

This has helped, to make some concepts regarding layers clear to me;-)
Regards
Uwe
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