[Denemo-devel] [bug #50661] Commands to enter notes from PC keyboard

[Richard Shann]

Follow-up Comment #1, bug #50661 (project denemo):

This script sets up a UK keyboard to act as a MIDI simulator:

;;;;;;;SimulateMidi keys a, w etc respond like a piano keyboard with notes
from Middle C to G in the next octave. US keyboards need the top few names
adjusting, other keyboards even more.

(define-once SimulateMidi::active #f)
(if SimulateMidi::active
    (begin
        (set! SimulateMidi::active #f)
        (d-InfoDialog (_ "MIDI simulator end")))
    (begin    
        (d-InputFilterNames "Simulated MIDI Filter")
        (let loop ()
            (define key (d-GetKeypress))
            (cond
                ((equal? key "a")  (d-PutMidi #xFF3C90))
                ((equal? key "w")  (d-PutMidi #xFF3D90))
                ((equal? key "s")  (d-PutMidi #xFF3E90))
                ((equal? key "e")  (d-PutMidi #xFF3F90))
                ((equal? key "d")  (d-PutMidi #xFF4090))
                ((equal? key "f")  (d-PutMidi #xFF4190));f
                ((equal? key "t")  (d-PutMidi #xFF4290))
                ((equal? key "g")  (d-PutMidi #xFF4390))
                ((equal? key "y")  (d-PutMidi #xFF4490))
                ((equal? key "h")  (d-PutMidi #xFF4590))
                ((equal? key "u")  (d-PutMidi #xFF4690))
                ((equal? key "j")  (d-PutMidi #xFF4790));b
                ((equal? key "k")  (d-PutMidi #xFF4890))
                ((equal? key "o")  (d-PutMidi #xFF4990))
                ((equal? key "l")  (d-PutMidi #xFF4A90))
                ((equal? key "p")  (d-PutMidi #xFF4B90))
                ((equal? key "semicolon")  (d-PutMidi #xFF4C90))
                ((equal? key "apostrophe")  (d-PutMidi #xFF4D90))
                ((equal? key "bracketright")  (d-PutMidi #xFF4E90))
                ((equal? key "numbersign")  (d-PutMidi #xFF4F90))
                )
            (if (not (equal? key "Escape"))
                (loop)))
            (set! SimulateMidi::active #f)
            (d-InputFilterNames "No MIDI Filter")
            (TimedNotice (_ "MIDI simulator end"))))

;;;;;;;;end of script

The script ends the simulated MIDI when Escape is pressed. Other keys are
ignored. It would be nice to have other keys passed back to be actioned (e.g.
arrow keys for correcting notes ...)
This would require a new functionality in C.
The procedure (in scheme-callbacks.c) could take a parameter to say put back
the last event. Here is the current code:

SCM
scheme_get_keypress (void)
{
  GdkEventKey event;
  gboolean success = intercept_scorearea_keypress (&event);
  if (success)
    {
      gchar *str = dnm_accelerator_name (event.keyval, event.state);
      SCM scm = scm_from_locale_string (str);
      g_free (str);
      return scm;
    }
  else
    return SCM_BOOL (FALSE);
}

event would need to be static and calling with #f as parameter could lookup
the command for the event lookup_command_for_keyevent (&event)
and then execute the command, if any.

    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?50661>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.gnu.org/