Re: Save an attribute of a drop-down list item

[Cyrille Chepelov <cyrille chepelov org>]

Le Thu, Jun 10, 2004, Ã  11:23:10AM +0200, fenxp free fr a écrit:
> When you save a Diagram with format .Dia uncompressed,
> the value of a item of an drop-down list is saved as an integer.
> This is an example:
> 
> <dia:attribute name="type">
>    <dia:enum val="0"/>
> </dia:attribute>
> 
> Is that possible to save the value of the attribute instead of the value of the
> index ?
> 
> I would like to have a thing of this kind:
> 
> <dia:attribute name="type">
>    <dia:string>#Normal step#</dia:string>
> </dia:attribute>

you can't have that. "Normal step"  would typically be specified as a
translatable constant string (N_("Normal step")), which means that in
your locale, you'd actually save "Etape normale", and nobody but people
using a subset of LC_ALL=fr would be able to reload your diagram.

It should be possible to have dia save:
	<dia:enum val="0"><dia:enumlabel xml:lang="fr">Etape
	normale</dia:enumlabel></dia:enum>
with the dia:enumlabel being a strictly optional element we'd strongly
discourage the use (just as a little help for quick and dirty scripts);
I don't know whether it's really worth it 
(the space cost for compressed dia files would be negligible anyway).

There's another way to describe this effect: as it is right now, StdProp
strictly depends on the Standard C int-to-enum and enum-to-int implicit cast 
behaviour to operate correctly.

This means in particular that re-ordering the values of a saved enum is
a definitive no-no (unless you explicitly define the enum constants)

It should be possible to have dia save:
        <dia:enum val="0"><dia:enumlabel xml:lang="fr">Etape
	normale</dia:enumlabel></dia:enum>
with the dia:enumlabel being a strictly optional element we'd strongly
discourage the use (just as a little help for quick and dirty scripts);
I don't know whether it's really worth it (the space cost for compressed 
dia files would be negligible anyway).
		
	-- Cyrille
	
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