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Re: NoteHead X-offset, conflict with ly:grob-relative-coordinate
From: |
Paul Morris |
Subject: |
Re: NoteHead X-offset, conflict with ly:grob-relative-coordinate |
Date: |
Tue, 11 Dec 2012 20:25:00 -0500 |
On Dec 11, 2012, at 7:29 PM, Thomas Morley <address@hidden> wrote:
> 2012/12/12 Paul Morris <address@hidden>:
>> On Dec 11, 2012, at 3:32 PM, Colin Hall <address@hidden> wrote:
>>
>>> On Tue, Dec 11, 2012 at 04:32:57AM +0000, Keith OHara wrote:
>>>> Colin Hall <colinghall <at> gmail.com> writes:
>>>>
>>>>> I'm going to post a link to this on the dev forum and see if we can
>>>>> identify what the bug is, and then I can create a tracker.
>>>>>
>>>> I don't see any bug; reasoning is on -devel.
>>>
>>> That's great, Keith, thanks.
>>>
>>> Paul, here's a link to Keith's explanation on the lilypond-devel
>>> mailing list archive:
>>>
>>> http://lists.gnu.org/archive/html/lilypond-devel/2012-12/msg00116.html
>>>
>>> I believe Thomas gave you some ideas of how to obtain the engraving
>>> you wanted.
>>>
>>> OK?
>>
>> Hi Colin,
>>
>> Ok, as Keith is saying, if this is how it is supposed to work then I guess
>> it shouldn't be considered a bug. And luckily there's another way to get
>> the same results (thanks to Thomas for that tip).
>>
>> I guess that means that a NoteHead's X-offset has not been designed to be a
>> property that can be reliably overridden. I wonder if it would be worth
>> documenting this somehow, to keep people from trying to go down this path in
>> the future.
>>
>> Currently the internals page for NoteHead[1] makes it sound like X-offset is
>> simply a number that you can easily override:
>>
>> X-offset (number):
>> ly:note-head::stem-x-shift
>> The horizontal amount that this object is moved relative to its X-parent.
>>
>> but apparently something more complicated is going on, involving the other
>> notes in a chord, and the function for determining their placement.
>
> Well, quoting
>
> NR 5.5.1 Aligning objects:
>
> Note: Many objects have special positioning considerations which cause
> any setting of X-offset or Y-offset to be ignored or modified, even
> though the object supports the self-alignment-interface. Overriding
> the X-offset or Y-offset properties to a fixed value causes the
> respective self-alignment property to be disregarded.
>
> http://lilypond.org/doc/v2.17/Documentation/notation/aligning-objects
Ah, ok, so that page is already documenting this.
> But I found no hint about it in the IR
Would it make sense if under "X-offset" in the IR it said something like this?
"The horizontal amount that this object is moved relative to its X-parent. The
amount may be set directly or may be set to be calculated by procedures in
order to achieve alignment with the parent object."
(Added a borrowed sentence from the page linked above.)
>> Anyway, documenting this somehow would be my suggestion, but I don't have
>> the knowledge to do it, and I realize that there may be higher priorities,
>> so take it FWIW.
>>
>> On a related note, I just added a snippet for this to the LSR[2] that uses
>> ly:grob-translate-axis! instead of X-offset, and I could add a comment to it
>> saying that overriding a NoteHead's X-offset does not always work, and to
>> use ly:grob-translate-axis! instead.
>>
>> (The snippet is not currently working in the LSR, but it works fine for me
>> on 2.16, so I am guessing that there is a compatibility problem with 2.14.)
>
> Will have a look at it.
Thanks. I tried to install 2.14.2 to confirm that this was the problem, but
was unable to install it. (Maybe it is incompatible with my OS?)
>> Thanks,
>> -Paul
>>
>> [1] http://www.lilypond.org/doc/v2.16/Documentation/internals/notehead
>> [2] http://lsr.dsi.unimi.it/LSR/Item?u=1&id=861
>>
>>
>>
>>
>> _______________________________________________
>> bug-lilypond mailing list
>> address@hidden
>> https://lists.gnu.org/mailman/listinfo/bug-lilypond
>
> -Harm
-Paul
- NoteHead X-offset, conflict with ly:grob-relative-coordinate, Paul Morris, 2012/12/09
- Re: NoteHead X-offset, conflict with ly:grob-relative-coordinate, Thomas Morley, 2012/12/10
- Re: NoteHead X-offset, conflict with ly:grob-relative-coordinate, Colin Hall, 2012/12/10
- Re: NoteHead X-offset, conflict with ly:grob-relative-coordinate, Keith OHara, 2012/12/10
- Re: NoteHead X-offset, conflict with ly:grob-relative-coordinate, Colin Hall, 2012/12/11
- Re: NoteHead X-offset, conflict with ly:grob-relative-coordinate, Paul Morris, 2012/12/11
- Re: NoteHead X-offset, conflict with ly:grob-relative-coordinate, Thomas Morley, 2012/12/11
- Re: NoteHead X-offset, conflict with ly:grob-relative-coordinate,
Paul Morris <=
- Re: NoteHead X-offset, conflict with ly:grob-relative-coordinate, Colin Hall, 2012/12/14
Re: NoteHead X-offset, conflict with ly:grob-relative-coordinate, Paul Morris, 2012/12/10