A question about data types?

A question about data types?

[Ian Lawrence]

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Sorry. me again...and I have been all over the wiki, mailing lists and
manuals...

I have this:

\setlayer [progresssteps] % name of the layer
[hoffset=904 px, voffset= 28\nuggetnumber px]  % placement (from upper left
corner of the layer)
{\stepstack}  % the actual contents of the layer

And I am hoping that as I increase nuggetnumber the voffset of the layer
will be 28*nuggetnumber

I am setting nuggetnumber like this for the moment:

\def \nuggetnumber{3}

(in the other dev document it is the result of counter, so set dynamically)

and this in the text

\nuggetnumber

which compiles to '3', so I assume the assignment is good to go.

varying both nuggetnumber and the scale factor (28) shift the layer up and
down, but not in a way that suggests that 28\nuggetnumber is being evaluated
as a product (so a scale factor of 7 and a nuggetnumber of 2 do not give the
same output as a scale factor of 2 and a nuggetnumber of 7).

So I am led to think that there is something in the evaluating that is going
wrong - data types / units? (if I hard code in the results I am expecting,
say 28 px, 56 px or 84 px then I get exactly what I want...

Thanks, as ever

(Same result in ConTEXt ii or iv)
Ian

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Re: A question about data types?

[Stefan Müller]

Hi!

On 02.03.2011 12:25, Ian Lawrence wrote:
> Sorry. me again...and I have been all over the wiki, mailing lists and
> manuals...
>
> I have this:
>
> \setlayer[progresssteps]% name of the layer
> [hoffset=904 px, voffset= 28\nuggetnumber px]  % placement (from upper
> left corner of the layer)
> {\stepstack}  % the actual contents of the layer
>
> And I am hoping that as I increase nuggetnumber the voffset of the layer
> will be 28*nuggetnumber
>
> I am setting nuggetnumber like this for the moment:
>
> \def \nuggetnumber{3}
>
> (in the other dev document it is the result of counter, so set dynamically)
>
> and this in the text
>
> \nuggetnumber
>
> which compiles to '3', so I assume the assignment is good to go.
>
> varying both nuggetnumber and the scale factor (28) shift the layer up
> and down, but not in a way that suggests that 28\nuggetnumber is being
> evaluated as a product (so a scale factor of 7 and a nuggetnumber of 2
> do not give the same output as a scale factor of 2 and a nuggetnumber of 7).

If you expect a product you should tell ConTeXt you want a product. You 
don't do that with "28\nuggetnumber px".

Check out http://wiki.contextgarden.net/Expressions

I think "\dimexpr\nuggetnumber*28px\relax" should get you there, but I'm 
not sure (untested).

Stefan

> So I am led to think that there is something in the evaluating that is
> going wrong - data types / units? (if I hard code in the results I am
> expecting, say 28 px, 56 px or 84 px then I get exactly what I want...
>
> Thanks, as ever
>
> (Same result in ConTEXt ii or iv)
> Ian
>
>
>
> ___________________________________________________________________________________
> 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
> ___________________________________________________________________________________
___________________________________________________________________________________
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
___________________________________________________________________________________

Re: A question about data types?

[Wolfgang Schuster]

Am 02.03.2011 um 12:25 schrieb Ian Lawrence:

> Sorry. me again...and I have been all over the wiki, mailing lists and manuals...
> 
> I have this:
> 
> \setlayer	[progresssteps]	% name of the layer
> 		[hoffset=904 px, voffset= 28\nuggetnumber px]  % placement (from upper left corner of the layer)
> 		{\stepstack}  % the actual contents of the layer
> 
> And I am hoping that as I increase nuggetnumber the voffset of the layer will be 28*nuggetnumber

Variant 1:

\newdimen\baseoffset \baseoffset=28px

\setlayer[…][voffset=4\nuggetnumber]{…}

Variant 2:

\def\nuggetnumber{4}

\setlayer[…][voffset=\dimexpr28px*\nuggetnumber\relax]{…}

Variant 3 (what i suggest):

\definemeasure[baseoffset][28px]
\definemeasure[verticaloffset][\dimexpr\measure{baseoffset}*4\relax] % replace “4” with your own factor

\setlayer[…][voffset=\measure{verticaloffset}]{…}

Wolfgang

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___________________________________________________________________________________

Re: A question about data types?

[Ian Lawrence]

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Thank you both.

I got as far as \dimexpr  (expressions) page in the Wiki, and all the words
made sense, more or less, but not the whole.

In case anyone else find this useful, I have success with Wolfgang 2 and 3,
with (2) being the simplest....but that may just be the fit to my brain.


It's building stacked progress bars for documents with subsections, in case
anyone searches this- colours and prettification to follow!


Ian

On 2 March 2011 11:41, Wolfgang Schuster
<schuster.wolfgang@googlemail.com>wrote:

>
> Am 02.03.2011 um 12:25 schrieb Ian Lawrence:
>
> > Sorry. me again...and I have been all over the wiki, mailing lists and
> manuals...
> >
> > I have this:
> >
> > \setlayer     [progresssteps] % name of the layer
> >               [hoffset=904 px, voffset= 28\nuggetnumber px]  % placement
> (from upper left corner of the layer)
> >               {\stepstack}  % the actual contents of the layer
> >
> > And I am hoping that as I increase nuggetnumber the voffset of the layer
> will be 28*nuggetnumber
>
> Variant 1:
>
> \newdimen\baseoffset \baseoffset=28px
>
> \setlayer[…][voffset=4\nuggetnumber]{…}
>
> Variant 2:
>
> \def\nuggetnumber{4}
>
> \setlayer[…][voffset=\dimexpr28px*\nuggetnumber\relax]{…}
>
> Variant 3 (what i suggest):
>
> \definemeasure[baseoffset][28px]
> \definemeasure[verticaloffset][\dimexpr\measure{baseoffset}*4\relax] %
> replace “4” with your own factor
>
> \setlayer[…][voffset=\measure{verticaloffset}]{…}
>
> Wolfgang
>
>
> ___________________________________________________________________________________
> 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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___________________________________________________________________________________
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
___________________________________________________________________________________