format-metronome-mark and metronome-markup don't support styles other than default

format-metronome-mark and metronome-markup don't support styles other than default

issue 3096

- introducing 'styled-metronome-markup' with the possibility to set
different styles for note-head and flag. Also, and currently quite
theoretical, it is now possible to use another font here. For now
the font-argument is used only to make
  \override MetronomeMark #'font-name = ...
possible.

- predefining several formatter and providing the possibility to let them
customize by the user.

- adding a regtest for different 'metronomeMarkFormatter'.

- Limitation: There is still need to specify, what note-head/flag-style
should be taken.

[thomasmorley651, 2013-10-17 21:24:52]

Please review.

[dak, 2013-10-17 21:29:04]

The interface looks cumbersome to use.  Why don't you just take the styles that
are used in the Score?  It might mean adding the respective properties to the
font-interface (MetronomeMark has both font-interface and text-interface), but
that seems reasonably straightforward.

[thomasmorley651, 2013-10-17 21:54:20]

On 2013/10/17 21:29:04, dak wrote:
> The interface looks cumbersome to use.  Why don't you just take the styles
that
> are used in the Score?  
Well, short answer: I don't know how.
> It might mean adding the respective properties to the
> font-interface (MetronomeMark has both font-interface and text-interface), but
> that seems reasonably straightforward.
Again, I don't know how. Afair, I didn't try something like that before.
Would be great, if you could point me to an example where someone did similar
before.
I then could study how to do it.

[thomasmorley651, 2013-10-21 23:52:40]

adds flag-style to grob-properties for use by MetronomeMark

[thomasmorley651, 2013-10-22 22:20:13]

Adds 'flag-style to text-interface.cc and MetronomeMark-properties in
define-grobs.scm