89 lines
3.1 KiB
C
89 lines
3.1 KiB
C
/*
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Copyright (C) 2012 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __PIANO_KEYBOARD_H__
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#define __PIANO_KEYBOARD_H__
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#include <glib.h>
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#include <gtk/gtkdrawingarea.h>
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G_BEGIN_DECLS
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#define TYPE_PIANO_KEYBOARD (piano_keyboard_get_type ())
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#define PIANO_KEYBOARD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), TYPE_PIANO_KEYBOARD, PianoKeyboard))
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#define PIANO_KEYBOARD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), TYPE_PIANO_KEYBOARD, PianoKeyboardClass))
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#define IS_PIANO_KEYBOARD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TYPE_PIANO_KEYBOARD))
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#define IS_PIANO_KEYBOARD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TYPE_PIANO_KEYBOARD))
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#define PIANO_KEYBOARD_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), TYPE_PIANO_KEYBOARD, PianoKeyboardClass))
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typedef struct _PianoKeyboard PianoKeyboard;
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typedef struct _PianoKeyboardClass PianoKeyboardClass;
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#define NNOTES 127
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#define OCTAVE_MIN -1
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#define OCTAVE_MAX 7
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struct PKNote {
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int pressed; /* 1 if key is in pressed down state. */
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int sustained; /* 1 if note is sustained. */
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int x; /* Distance between the left edge of the key
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* and the left edge of the widget, in pixels. */
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int w; /* Width of the key, in pixels. */
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int h; /* Height of the key, in pixels. */
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int white; /* 1 if key is white; 0 otherwise. */
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};
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struct _PianoKeyboard
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{
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GtkDrawingArea da;
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int maybe_stop_sustained_notes;
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int sustain_new_notes;
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int enable_keyboard_cue;
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int octave;
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int widget_margin;
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int note_being_pressed_using_mouse;
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int last_key;
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gboolean monophonic;
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volatile struct PKNote notes[NNOTES];
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/* Table used to translate from PC keyboard character to MIDI note number. */
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GHashTable *key_bindings;
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};
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struct _PianoKeyboardClass
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{
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GtkDrawingAreaClass parent_class;
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};
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GType piano_keyboard_get_type (void) G_GNUC_CONST;
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GtkWidget* piano_keyboard_new (void);
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void piano_keyboard_sustain_press (PianoKeyboard *pk);
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void piano_keyboard_sustain_release (PianoKeyboard *pk);
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void piano_keyboard_set_note_on (PianoKeyboard *pk, int note);
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void piano_keyboard_set_note_off (PianoKeyboard *pk, int note);
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void piano_keyboard_set_keyboard_cue (PianoKeyboard *pk, int enabled);
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void piano_keyboard_set_monophonic (PianoKeyboard *pk, gboolean monophonic);
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void piano_keyboard_set_octave (PianoKeyboard *pk, int octave);
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gboolean piano_keyboard_set_keyboard_layout (PianoKeyboard *pk, const char *layout);
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G_END_DECLS
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#endif /* __PIANO_KEYBOARD_H__ */
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