[NTG-context] How to calculate the height of text of a certain width?

[Rudolf Bahr]

On Tue, Mar 24, 2020 at 03:56:18PM +0100, Wolfgang Schuster wrote:
> Rudolf Bahr schrieb am 24.03.2020 um 12:19:
> > Hello dear All,
> > 
> > the following MWE works best:
> > 
> > 
> > \definelayer[LAY]
> > \starttext
> > 
> > \setlayerframed[LAY]
> >    [x=0pt,y=20pt]
> >    [frame=on,
> >     width=300pt,
> >     align={right,}]   % tolerant}]
> >    {\input ward }
> > \flushlayer[LAY]
> > \stoptext
> > 
> > 
> > Now, it could have a favourable effect on designing a page if the height of a text
> > of certain width could be calculated in advance, depending of the font.
> > Is there a way?
> > 
> > As I fear, TeX's means "\setbox" woun't work with aligned texts.
> 
> Can you give more details, I have no idea what you mean with aligned texts
> (layers?).
> 
> Wolfgang


Hi Wolfgang,

With "aligned texts" I thought of "align={right,}]" in the above example or
text which is "flushed right":

\setbox0=\vbox{... somehow flushed text ...} wount work, i.e \wd0 or \ht0
will both result in 0. With "unflushed" text this means will work perfectly.

Sorry for the inconvinience to having been not very clear.

Rudolf