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



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