gtk2_ardour/gtk_pianokeyboard.h

   1 #ifndef __PIANO_KEYBOARD_H__
   2 #define __PIANO_KEYBOARD_H__
   3
   4 #include <glib.h>
   5 #include <gtk/gtkdrawingarea.h>
   6
   7 G_BEGIN_DECLS
   8
   9 #define TYPE_PIANO_KEYBOARD                     (piano_keyboard_get_type ())
  10 #define PIANO_KEYBOARD(obj)                     (G_TYPE_CHECK_INSTANCE_CAST ((obj), TYPE_PIANO_KEYBOARD, PianoKeyboard))
  11 #define PIANO_KEYBOARD_CLASS(klass)             (G_TYPE_CHECK_CLASS_CAST ((klass), TYPE_PIANO_KEYBOARD, PianoKeyboardClass))
  12 #define IS_PIANO_KEYBOARD(obj)                  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TYPE_PIANO_KEYBOARD))
  13 #define IS_PIANO_KEYBOARD_CLASS(klass)          (G_TYPE_CHECK_CLASS_TYPE ((klass), TYPE_PIANO_KEYBOARD))
  14 #define PIANO_KEYBOARD_GET_CLASS(obj)           (G_TYPE_INSTANCE_GET_CLASS ((obj), TYPE_PIANO_KEYBOARD, PianoKeyboardClass))
  15
  16 typedef struct  _PianoKeyboard                  PianoKeyboard;
  17 typedef struct  _PianoKeyboardClass             PianoKeyboardClass;
  18
  19 #define NNOTES                  127
  20
  21 #define OCTAVE_MIN      -1
  22 #define OCTAVE_MAX      7
  23
  24 struct Note {
  25         int                     pressed;                /* 1 if key is in pressed down state. */
  26         int                     sustained;              /* 1 if note is sustained. */
  27         int                     x;                      /* Distance between the left edge of the key
  28                                                          * and the left edge of the widget, in pixels. */
  29         int                     w;                      /* Width of the key, in pixels. */
  30         int                     h;                      /* Height of the key, in pixels. */
  31         int                     white;                  /* 1 if key is white; 0 otherwise. */
  32 };
  33
  34 struct _PianoKeyboard
  35 {
  36         GtkDrawingArea          da;
  37         int                     maybe_stop_sustained_notes;
  38         int                     sustain_new_notes;
  39         int                     enable_keyboard_cue;
  40         int                     octave;
  41         int                     widget_margin;
  42         int                     note_being_pressed_using_mouse;
  43         volatile struct Note    notes[NNOTES];
  44         /* Table used to translate from PC keyboard character to MIDI note number. */
  45         GHashTable              *key_bindings;
  46 };
  47
  48 struct _PianoKeyboardClass
  49 {
  50         GtkDrawingAreaClass     parent_class;
  51 };
  52
  53 GType           piano_keyboard_get_type         (void) G_GNUC_CONST;
  54 GtkWidget*      piano_keyboard_new              (void);
  55 void            piano_keyboard_sustain_press    (PianoKeyboard *pk);
  56 void            piano_keyboard_sustain_release  (PianoKeyboard *pk);
  57 void            piano_keyboard_set_note_on      (PianoKeyboard *pk, int note);
  58 void            piano_keyboard_set_note_off     (PianoKeyboard *pk, int note);
  59 void            piano_keyboard_set_keyboard_cue (PianoKeyboard *pk, int enabled);
  60 void            piano_keyboard_set_octave (PianoKeyboard *pk, int octave);
  61 gboolean        piano_keyboard_set_keyboard_layout (PianoKeyboard *pk, const char *layout);
  62
  63 G_END_DECLS
  64
  65 #endif /* __PIANO_KEYBOARD_H__ */
  66