Kieren MacMillan <kieren_macmil...@sympatico.ca> writes:
> Hello all,
>
> In the snippet included below, I’m hoping the second line of the
> scoreTitleMarkup will take no vertical space. If you comment out that line,
> you’ll see that it *does* take no space, but when it’s included, so is the
> 25mm spacing that is [I thought] conditional on the presence of a ‘testB’
> property in the property.
>
> Where is my code going wrong?
> More precisely, how can I make it work as intended? =)
>
> Thanks,
> Kieren.
>
> %%%% SNIPPET BEGINS
> \version "2.19.46"
>
> #(define-markup-command (when-property layout props symbol markp) (symbol?
> markup?)
> (if (chain-assoc-get layout props symbol markp)
> (interpret-markup layout props markp)
> empty-stencil))
-- Function: ly:chain-assoc-get key achain default-value
strict-checking
Return value for KEY from a list of alists ACHAIN. If no entry is
found, return DEFAULT-VALUE or ‘#f’ if DEFAULT-VALUE is not
specified. [...]
DEFAULT-VALUE is specified as markp, and a markup is never #f. So your
condition is always true when the specified KEY cannot be found.
--
David Kastrup
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