Ahoj!

···<date: 2012-06-18, Monday>···<from: Procházka Lukáš Ing. - Pontex s. r. o.>···

> On Mon, 18 Jun 2012 16:56:56 +0200, Jaroslav Hajtmar <hajtmar@gyza.cz> wrote:
> 
> >Ahoj...
> >To bych ti rekl ...  :-)
> >  tex.box[0].height
> 
> ... To ale získáš jen výšku boxu, ne?
> 
> Co když ten hbox chceš vysázet Luou na nějakou šířku?

Na to budeš potřebovat node.hpack() (luatexref-t.pdf, s. 95).

···8<···································································
\starttext
foo
\startluacode
  local newnode = node.new(node.id"glyph")
  newnode.char  = unicode.utf8.byte"x"
  newnode.font  = font.current() -- won’t work before \starttext
  newnode.lang  = tex.language
  --- second arg to node.hpack is width <int>
  local hbox    = node.hpack(newnode, 2*newnode.width)
  node.write(hbox)
\stopluacode
bar
\stoptext
···8<···································································

The first argument is the head of a node list, the second can be
the width in sp (or “spread”). See Patrick’s excellent tutorial:
  http://wiki.luatex.org/index.php/TeX_without_TeX
to get started with node fun.

(The \box<n> registers are accessible as tex.box, see page 112 in
the luatex manual.)

Philipp

> 
> L.
> 
> 
> >
> >J.
> >
> >
> >
> >
> >
> >Dne 18.6.2012 16:53, Procházka Lukáš Ing. - Pontex s. r. o. napsal(a):
> >>Hello,
> >>
> >>(my apologies if this message is duplicated - our mail server was
> >>out-of-order some time)
> >>
> >>how to call "\box0" and "\hbox to3cm{abc}" by Lua?
> >>
> >>----
> >>\startluacode
> >>   context[[\box0]] % OK but a "nicer" way preferred, so keep on trying -
> >>   context.box(0) % Error
> >>   context.box{0} % Error
> >>   context.box"0" % Error
> >>
> >>   context.hbox({to = "cm"}, "abc") % Error
> >>\stopluacode
> >>----
> >>
> >>TIA.
> >>
> >>Best regards,
> >>
> >>Lukas
> >>
> >>
> >
> >___________________________________________________________________________________
> >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/
> >wiki     : http://contextgarden.net
> >___________________________________________________________________________________
> >
> 
> 
> -- 
> Ing. Lukáš Procházka [mailto:LPr@pontex.cz]
> Pontex s. r. o.      [mailto:pontex@pontex.cz] [http://www.pontex.cz]
> Bezová 1658
> 147 14 Praha 4
> 
> Tel: +420 244 062 238
> Fax: +420 244 461 038
> 
> ___________________________________________________________________________________
> 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/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________

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