Re: skyline vs. y-aligned-side

[Han-Wen Nienhuys]

Joe Neeman escreveu:
> On 1/25/07, Han-Wen Nienhuys <address@hidden> wrote:
>>
>> Hello Joe,
>>
>> 2 questions
>>
>> 1. do you see any reason to use
>>
>>  ly:side-position-interface::y-aligned-side
>>
>> for Y-offset callbacks on stuff that uses outside-staff-priority?
> 
> It makes certain user-overrides a little easier. Since
> outside-staff-priority only ever pushes objects away from the staff,
> you could add extra padding to an outside-staff-priority object to
> give things a more uniform appearance, for example.

Ah, I thought it replaced the  y-positioning wholesale, but 
it starts from the position calculated by y-aligned-side  instead?

>> 2. it would be cool if it were possible to position several grobs as a
>> single outline. Right now, we use DynamicLineSpanner to ensure that
>> all related dynamics stay on one Y position, but I suspect that it
>> should be possible to use the outside-staff-prority stuff to do that.
>> Do you think you could pull that off? Of course, the grobs will be marked
>> so that it is possible to distinguish related  groups of dynamics.
>>
>> The same holds for piano pedals. If we could do this, this would simplify
>> dynamics-engraver a lot, and we could scrap piano-pedal-align-engraver.
> 
> Sure, I'll give that a try. As far as distinguishing related dynamics
> goes, what if each DynamicText (PianoPedal, etc.) just had a pointer
> to the next related one? Then you have a lot of flexibility (in the
> backend at least) because you can align arbitrary grob types (eg. a
> DynamicText with a VoltaBracket).

Sounds like a good idea. 

-- 

Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen

LilyPond Software Design
 -- Code for Music Notation
http://www.lilypond-design.com