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#ifndef __PIANO_KEYBOARD_H__
#define __PIANO_KEYBOARD_H__

#include <glib.h>
#include <gtk/gtkdrawingarea.h>


#define TYPE_PIANO_KEYBOARD               (piano_keyboard_get_type ())
#define PIANO_KEYBOARD(obj)               (G_TYPE_CHECK_INSTANCE_CAST ((obj), TYPE_PIANO_KEYBOARD, PianoKeyboard))
#define PIANO_KEYBOARD_CLASS(klass)       (G_TYPE_CHECK_CLASS_CAST ((klass), TYPE_PIANO_KEYBOARD, PianoKeyboardClass))
#define PIANO_KEYBOARD_GET_CLASS(obj)           (G_TYPE_INSTANCE_GET_CLASS ((obj), TYPE_PIANO_KEYBOARD, PianoKeyboardClass))

typedef struct    _PianoKeyboard                PianoKeyboard;
typedef struct    _PianoKeyboardClass           PianoKeyboardClass;

#define NNOTES                127

#define OCTAVE_MIN      -1
#define OCTAVE_MAX      7

struct Note {
      int               pressed;          /* 1 if key is in pressed down state. */
      int               sustained;        /* 1 if note is sustained. */
      int               x;                /* Distance between the left edge of the key
                                           * and the left edge of the widget, in pixels. */
      int               w;                /* Width of the key, in pixels. */
      int               h;                /* Height of the key, in pixels. */
      int               white;                  /* 1 if key is white; 0 otherwise. */

struct _PianoKeyboard
      GtkDrawingArea          da;
      int               maybe_stop_sustained_notes;
      int               sustain_new_notes;
      int               enable_keyboard_cue;
      int               octave;
      int               widget_margin;
      int               note_being_pressed_using_mouse;
      volatile struct Note    notes[NNOTES];
      /* Table used to translate from PC keyboard character to MIDI note number. */
      GHashTable        *key_bindings;

struct _PianoKeyboardClass
      GtkDrawingAreaClass     parent_class;

GType       piano_keyboard_get_type       (void) G_GNUC_CONST;
GtkWidget*  piano_keyboard_new            (void);
void        piano_keyboard_sustain_press  (PianoKeyboard *pk);
void        piano_keyboard_sustain_release      (PianoKeyboard *pk);
void        piano_keyboard_set_note_on    (PianoKeyboard *pk, int note);
void        piano_keyboard_set_note_off   (PianoKeyboard *pk, int note);
void        piano_keyboard_set_keyboard_cue     (PianoKeyboard *pk, int enabled);
void        piano_keyboard_set_octave (PianoKeyboard *pk, int octave);
gboolean    piano_keyboard_set_keyboard_layout (PianoKeyboard *pk, const char *layout);


#endif /* __PIANO_KEYBOARD_H__ */

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