Add ability to perform input with computer (not midi) keyboard.

This is useful for testing when away from a keyboard, and also useful
in its own right for ensuring that the user knows the names of the
notes (not just their position on the piano keyboard).

When using a computer keyboard for input only the note name itself is
needed---the correct octave is chosen automatically.

diff --git a/scherzo.c b/scherzo.c
index 2d43aee0bd5d8aacdc6e0fe43910735b2a8331d6..8d6ca9af7bd8cb49bdee15ed2ada4c321c4d5271 100644 (file)
--- a/scherzo.c
+++ b/scherzo.c
@@ -58,6 +58,19 @@ typedef struct scherzo
     score_note_t **notes_pressed;
 } scherzo_t;
 
+/* Forward declarations. */
+static score_note_t *
+scherzo_add_note (scherzo_t *scherzo, score_pitch_t pitch, int octave);
+
+static void
+scherzo_remove_note (scherzo_t *scherzo, score_pitch_t pitch, int octave);
+
+static void
+_judge_note (scherzo_t *scherzo, score_note_t *note);
+
+static void
+_score_challenge (scherzo_t *scherzo);
+
 static int
 on_delete_event_quit (unused (GtkWidget *widget),
                      unused (GdkEvent *event),
@@ -107,6 +120,8 @@ on_key_press_event (GtkWidget *widget,
                    void *user_data)
 {
     scherzo_t *scherzo = user_data;
+    int octave = scherzo->challenge.note->octave;
+    score_pitch_t pitch;
 
     switch (key->keyval) {
     case GDK_KEY_plus:
@@ -128,9 +143,105 @@ on_key_press_event (GtkWidget *widget,
     case GDK_KEY_Escape:
        gtk_main_quit ();
        return FALSE;
+    case GDK_KEY_c:
+    case GDK_KEY_C:
+       pitch = SCORE_PITCH_C;
+       break;
+    case GDK_KEY_d:
+    case GDK_KEY_D:
+       pitch = SCORE_PITCH_D;
+       break;
+    case GDK_KEY_e:
+    case GDK_KEY_E:
+       pitch = SCORE_PITCH_E;
+       break;
+    case GDK_KEY_f:
+    case GDK_KEY_F:
+       pitch = SCORE_PITCH_F;
+       break;
+    case GDK_KEY_g:
+    case GDK_KEY_G:
+       pitch = SCORE_PITCH_G;
+       break;
+    case GDK_KEY_a:
+    case GDK_KEY_A:
+       pitch = SCORE_PITCH_A;
+       break;
+    case GDK_KEY_b:
+    case GDK_KEY_B:
+       pitch = SCORE_PITCH_B;
+       break;
+    }
+
+    if ((key->keyval >= GDK_KEY_A && key->keyval <= GDK_KEY_G) ||
+       (key->keyval >= GDK_KEY_a && key->keyval <= GDK_KEY_g))
+    {
+       score_note_t *note;
+
+       note = scherzo_add_note (scherzo, pitch, octave);
+       _judge_note (scherzo, note);
+       gtk_widget_queue_draw (scherzo->window);
+
+       return TRUE;
     }
 
-    /* Allow the event to propagate to other handlers. */
+
+    /* Allow an unhandled event to propagate to other handlers. */
+    return FALSE;
+}
+
+static int
+on_key_release_event (unused (GtkWidget *widget),
+                     GdkEventKey *key,
+                     void *user_data)
+{
+    scherzo_t *scherzo = user_data;
+    int octave = scherzo->challenge.note->octave;
+    score_pitch_t pitch;
+
+    switch (key->keyval) {
+    case GDK_KEY_c:
+    case GDK_KEY_C:
+       pitch = SCORE_PITCH_C;
+       break;
+    case GDK_KEY_d:
+    case GDK_KEY_D:
+       pitch = SCORE_PITCH_D;
+       break;
+    case GDK_KEY_e:
+    case GDK_KEY_E:
+       pitch = SCORE_PITCH_E;
+       break;
+    case GDK_KEY_f:
+    case GDK_KEY_F:
+       pitch = SCORE_PITCH_F;
+       break;
+    case GDK_KEY_g:
+    case GDK_KEY_G:
+       pitch = SCORE_PITCH_G;
+       break;
+    case GDK_KEY_a:
+    case GDK_KEY_A:
+       pitch = SCORE_PITCH_A;
+       break;
+    case GDK_KEY_b:
+    case GDK_KEY_B:
+       pitch = SCORE_PITCH_B;
+       break;
+    }
+
+    if ((key->keyval >= GDK_KEY_A && key->keyval <= GDK_KEY_G) ||
+       (key->keyval >= GDK_KEY_a && key->keyval <= GDK_KEY_g))
+    {
+       scherzo_remove_note (scherzo, pitch, octave);
+       _score_challenge (scherzo);
+       gtk_widget_queue_draw (scherzo->window);
+
+       return TRUE;
+    }
+
+
+    /* Allow an unhandled event to propagate to other handlers. */
     return FALSE;
 }
 
@@ -183,17 +294,13 @@ _midi_to_score_pitch_and_octave (unsigned char midi_note,
 }
 
 static score_note_t *
-scherzo_add_note_midi (scherzo_t *scherzo, unsigned char midi_note)
+scherzo_add_note (scherzo_t *scherzo, score_pitch_t pitch, int octave)
 {
     score_staff_t *staff;
-    score_pitch_t pitch;
-    int octave;
     score_note_t *note;
 
     staff = scherzo->challenge.staff;
 
-    _midi_to_score_pitch_and_octave (midi_note, &pitch, &octave);
-
     note = score_add_note (staff, pitch, octave, SCORE_DURATION_WHOLE);
 
     scherzo->num_notes_pressed++;
@@ -211,16 +318,13 @@ scherzo_add_note_midi (scherzo_t *scherzo, unsigned char midi_note)
     return note;
 }
 
+
 static void
-scherzo_remove_note_midi (scherzo_t *scherzo, unsigned char midi_note)
+scherzo_remove_note (scherzo_t *scherzo, score_pitch_t pitch, int octave)
 {
-    score_pitch_t pitch;
-    int octave;
     score_note_t *note;
     int i;
 
-    _midi_to_score_pitch_and_octave (midi_note, &pitch, &octave);
-
     for (i = 0; i < scherzo->num_notes_pressed; i++) {
        note = scherzo->notes_pressed[i];
        if (note->pitch == pitch && note->octave == octave) {
@@ -236,6 +340,29 @@ scherzo_remove_note_midi (scherzo_t *scherzo, unsigned char midi_note)
     }
 }
 
+static score_note_t *
+scherzo_add_note_midi (scherzo_t *scherzo, unsigned char midi_note)
+{
+    score_pitch_t pitch;
+    int octave;
+
+    _midi_to_score_pitch_and_octave (midi_note, &pitch, &octave);
+
+    return scherzo_add_note (scherzo, pitch, octave);
+}
+
+
+static void
+scherzo_remove_note_midi (scherzo_t *scherzo, unsigned char midi_note)
+{
+    score_pitch_t pitch;
+    int octave;
+ 
+    _midi_to_score_pitch_and_octave (midi_note, &pitch, &octave);
+
+    scherzo_remove_note (scherzo, pitch, octave);
+}
+
 void
 _select_challenge (scherzo_t *scherzo)
 {
@@ -472,9 +599,13 @@ main (int argc, char *argv[])
                      G_CALLBACK (on_expose_event_draw),
                      &scherzo);
 
-    g_signal_connect (scherzo.window, "key-press-event",  
+    g_signal_connect (scherzo.window, "key-press-event",
                      G_CALLBACK (on_key_press_event),
                      &scherzo);
+
+    g_signal_connect (scherzo.window, "key-release-event",
+                     G_CALLBACK (on_key_release_event),
+                     &scherzo);
     
     gtk_widget_show_all (scherzo.window);