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From: | Urs Liska |
Subject: | Re: Behaviour of TextSpanner dashes |
Date: | Thu, 06 Feb 2014 09:16:01 +0100 |
User-agent: | Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 |
Am 06.02.2014 04:49, schrieb Keith OHara:
At 15:24 on 05 Feb 2014, Urs Liska wrote:- the vertical position of the dashes (i.e. raise it a little bit relatively to the text)TextSpanner.bound-details.left.stencil-align-dir-y = #CENTERunfortunately doesn't help. I'd need something like raise the dashes by 0.2 ...Kieren MacMillan <kieren_macmillan <at> sympatico.ca> writes:Surprisingly it looks different with different texts.Another side-effect of the [irritating] fact that Lilypond doesn’t use the text baseline as the reference point!?!?Lilypond does use the text baseline as reference point for text. It seems that override of stencil-align-dir-y = #CENTER makes LilyPond *replace* the usual reference point with the vertical center of the text, including descenders if there are any. Other values in place of CENTER move the reference to different fractions of the vertical extent. Looking at the code, leaving stencil-align-dir-y unset leaves the reference point at the baseline.
This seems like a plausible explanation of the behaviour.
The documentation talks next about stencil-offset Try that.
Hm, I finde stencil-offset in the properties of DynamicSpanner, but not TextSpanner. Overriding stencil-offset or left.stencil-offset doesn't seem to have any effect.
IR of TextSpanner states left.attach-dir which sounds good, but overriding doesn't seem to change anything.
Then there is left.Y - which makes the dashed line diagonal. What I find interesting too is left-bound-info (list): ly:line-spanner::calc-left-bound-info An alist of properties for determining attachments of spanners to edges.But unfortunately I don't find any concrete information about this "alist of properties".
[That's something I often struggle with: I think the function or parameter definition that is generated from the sources is often quite sparse]
Any further information or ideas? TIA Urs
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