Re-assert MIDI control map on parameter change

This makes the MIDI controller stay in sync with the programmer state
values.  It's kind of a coarse solution, though.  It would be better to:
1. Only re-assert the map if the changed parameter currently appears on
   the MIDI control surface
2. Only re-assert the part of the map related to the parameter

Almost as a side-effect, this enables switching between multiple control
maps.  Just call 'set-midi-control-map!' on the controller with the new
map.

1 files changed, 9 insertions, 2 deletions

diff --git a/guile/starlet/midi-control/base.scm b/guile/starlet/midi-control/base.scm
index 08310ae..9363e81 100644
--- a/guile/starlet/midi-control/base.scm
+++ b/guile/starlet/midi-control/base.scm
@@ -33,7 +33,9 @@
             send-note-off
             register-midi-note-callback!
             register-midi-cc-callback!
-            remove-midi-callback!))
+            remove-midi-callback!
+            get-parameter-controller
+            set-parameter-controller!))
 
 
 (define-class <midi-control-surface> (<object>)
@@ -52,7 +54,12 @@
 
   (send-queue
     #:init-form (make-atomic-box '())
-    #:getter get-send-queue))
+    #:getter get-send-queue)
+
+  (parameter-controller
+    #:init-value #f
+    #:getter get-parameter-controller
+    #:setter set-parameter-controller!))
 
 
 (define-class <midi-callback> (<object>)