date:20041127

Re: Creating markup macros

2004-11-27 Thread Nicolas Sceaux

Paul Scott <[EMAIL PROTECTED]> writes:

>>#(def-markup-command (restOne layout props) ()
>>   (interpret-markup layout props (markup #:number "1")))
>>
>>rOne = { R1^\markup \restOne }
>>
>>\score{ \rOne }
>>
>>
> Thank you very much.   Now can you give me a hint as to a good way to
> combine those two definitions so a the second definition of rOne isn't
> necessary?  This is because I want to make rOne eventually generate
> the correct one measure rest for any time signature.

AFAICT, it will not be possible to have \rOne automagically generate a
one measure rest for any time signature, as the current time signature
is not known at the time the one measure rest music expression will be
generated (a time signature indication is just another music
expression). You will have to give \rOne a duration parameter, but then
using directly R1^\one or R1*3/4^\one will be cleaner (more readable)
and not longer than, say, \rOne r1 or \rOne r2.

nicolas

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Re: Creating markup macros

2004-11-27 Thread Paul Scott

Nicolas Sceaux wrote:
Paul Scott <[EMAIL PROTECTED]> writes:
 

#(def-markup-command (restOne layout props) ()
 (interpret-markup layout props (markup #:number "1")))
rOne = { R1^\markup \restOne }
\score{ \rOne }
 

Thank you very much.   Now can you give me a hint as to a good way to
combine those two definitions so a the second definition of rOne isn't
necessary?  This is because I want to make rOne eventually generate
the correct one measure rest for any time signature.
   

AFAICT, it will not be possible to have \rOne automagically generate a
one measure rest for any time signature, as the current time signature
is not known at the time the one measure rest music expression will be
generated (a time signature indication is just another music
expression). You will have to give \rOne a duration parameter, but then
using directly R1^\one or R1*3/4^\one will be cleaner (more readable)
 

Ok, that looks pretty simple but I'm not quite sure yet how to combine 
my two definitions so I won't have to type '\markup' each time.  (see 
below).

Even so I would like to understand the scheme code.  I have been 
searching through the scm directory trying to make sense of all of 
this.  In scm/translation-functions.scm I found references to numerator 
and denominator which are listed as properties in the manual. 

1. Is that code actually referring to the same properties listed in the 
manual?

2. In that same file there is a reference to 'make-bold-markup' but I 
can't find it's definition anywhere.  I thought that might help me 
discover how to define 'one' so I can do R1*3/4^\one as you have suggested.

Can you comment on either of these two points so I can do more of this 
on my own?

I only yesterday discovered that you had used the new version of the 
code you wrote (for me?) some time ago as an example of setting 
properties.  That helped me generate a newer version of many property 
shortcuts I have that are based on the original help you gave me.

Thank you very much for that!
Paul

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Re: Creating markup macros (functions actually)

2004-11-27 Thread Nicolas Sceaux

Paul Scott <[EMAIL PROTECTED]> writes:

> Ok, that looks pretty simple but I'm not quite sure yet how to combine
> my two definitions so I won't have to type '\markup' each time.  (see
> below).
>
> Even so I would like to understand the scheme code.  I have been
> searching through the scm directory trying to make sense of all of
> this.  In scm/translation-functions.scm I found references to
> numerator and denominator which are listed as properties in the
> manual.
>
> 1. Is that code actually referring to the same properties listed in
> the manual?

If you mean the manual page
http://lilypond.org/doc/v2.5/Documentation/user/out-www/lilypond-internals/Music-properties.html
then absolutely. Music expressions (that you manipulate when using
a music function) have properties, which can be accessed with
`ly:music-property'.

> 2. In that same file there is a reference to 'make-bold-markup' but I
> can't find it's definition anywhere.  I thought that might help me
> discover how to define 'one' so I can do R1*3/4^\one as you have
> suggested.

The `def-markup-command' macro does a couple of thing:
 - it "registers" the command, so that the parser can know what to do
 when \markup \MYCOMMAND ... is encountered
 - it defines a make-MYCOMMAND-markup function
 - some internal things, such as the actual markup function
 definition.

When the \bold markup command is defined with def-markup-command, a
`make-bold-markup' function is also defined, that you can use to
programmatically build a bold markup: (make-bold-markup "foo"). Note
that this is equivalent to writing: (markup #:bold "foo").
See scm/new-markups.scm.

> Can you comment on either of these two points so I can do more of this
> on my own?

Note that in the case of \one, something like
   one=\markup \number 1
will be enough!

nicolas

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Re: Creating markup macros (functions actually)

2004-11-27 Thread Paul Scott

Nicolas Sceaux wrote:
Paul Scott <[EMAIL PROTECTED]> writes:

Ok, that looks pretty simple but I'm not quite sure yet how to combine
my two definitions so I won't have to type '\markup' each time. (see
below).
Even so I would like to understand the scheme code. I have been
searching through the scm directory trying to make sense of all of
this. In scm/translation-functions.scm I found references to
numerator and denominator which are listed as properties in the
manual.
1. Is that code actually referring to the same properties listed in
the manual?

If you mean the manual page
http://lilypond.org/doc/v2.5/Documentation/user/out-www/lilypond-internals/Music-properties.html
then absolutely. Music expressions (that you manipulate when using
a music function) have properties, which can be accessed with
`ly:music-property'.

Does this make any sense?
#(def-markup-command (testOne layout props) ()
(interpret-markup layout props
(markup #:number
(lambda (x) (ly:music-property x 'numerator)
2. In that same file there is a reference to 'make-bold-markup' but I
can't find it's definition anywhere. I thought that might help me
discover how to define 'one' so I can do R1*3/4^\one as you have
suggested.

The `def-markup-command' macro does a couple of thing:
- it "registers" the command, so that the parser can know what to do
when \markup \MYCOMMAND ... is encountered
- it defines a make-MYCOMMAND-markup function
- some internal things, such as the actual markup function
definition.
When the \bold markup command is defined with def-markup-command, a
`make-bold-markup' function is also defined, that you can use to
programmatically build a bold markup: (make-bold-markup "foo"). Note
that this is equivalent to writing: (markup #:bold "foo").

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