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Import jack-keyboard 2.5.

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git-svn-id: svn://svn.code.sf.net/p/jack-keyboard/code/trunk@2 1fa2bf75-7d80-4145-9e94-f9b4e25a1cb2
This commit is contained in:
trasz
2008-10-11 22:44:38 +00:00
parent bb34c61c76
commit 4dcd545075
16 changed files with 3254 additions and 0 deletions
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src/Makefile.am Normal file
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bin_PROGRAMS = jack-keyboard
jack_keyboard_SOURCES = jack-keyboard.c pianokeyboard.c pianokeyboard.h
jack_keyboard_LDADD = $(GTK_LIBS) $(GLIB_LIBS) $(GTHREAD_LIBS) $(X11_LIBS) $(JACK_LIBS) $(LASH_LIBS)
jack_keyboard_CFLAGS = $(GTK_CFLAGS) $(GLIB_CFLAGS) $(GTHREAD_CFLAGS) $(X11_CFLAGS) $(JACK_CFLAGS) $(LASH_CFLAGS) \
-DG_LOG_DOMAIN=\"jack-keyboard\"
desktopdir = $(datadir)/applications
desktop_DATA = jack-keyboard.desktop
EXTRA_DIST = $(desktop_DATA)

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src/jack-keyboard.c Normal file
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src/jack-keyboard.desktop Normal file
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[Desktop Entry]
Name=JACK Keyboard
Comment=Virtual keyboard for JACK MIDI
Exec=jack-keyboard
Icon=jack-keyboard.png
Categories=Application;AudioVideo;Audio;Midi;
Terminal=false
Type=Application

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src/pianokeyboard.c Normal file
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/*-
* Copyright (c) 2007, 2008 Edward Tomasz Napierała <trasz@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* This is piano_keyboard, piano keyboard-like GTK+ widget. It contains
* no MIDI-specific code.
*
* For questions and comments, contact Edward Tomasz Napierala <trasz@FreeBSD.org>.
*/
#include <assert.h>
#include <string.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "pianokeyboard.h"
#define PIANO_KEYBOARD_DEFAULT_WIDTH 730
#define PIANO_KEYBOARD_DEFAULT_HEIGHT 70
enum {
NOTE_ON_SIGNAL,
NOTE_OFF_SIGNAL,
LAST_SIGNAL
};
static guint piano_keyboard_signals[LAST_SIGNAL] = { 0 };
static void
draw_keyboard_cue(PianoKeyboard *pk)
{
int w = pk->notes[0].w;
int h = pk->notes[0].h;
GdkGC *gc = GTK_WIDGET(pk)->style->fg_gc[0];
int first_note_in_lower_row = (pk->octave + 5) * 12;
int last_note_in_lower_row = (pk->octave + 6) * 12 - 1;
int first_note_in_higher_row = (pk->octave + 6) * 12;
int last_note_in_higher_row = (pk->octave + 7) * 12 + 4;
gdk_draw_line(GTK_WIDGET(pk)->window, gc, pk->notes[first_note_in_lower_row].x + 3,
h - 6, pk->notes[last_note_in_lower_row].x + w - 3, h - 6);
gdk_draw_line(GTK_WIDGET(pk)->window, gc, pk->notes[first_note_in_higher_row].x + 3,
h - 9, pk->notes[last_note_in_higher_row].x + w - 3, h - 9);
}
static void
draw_note(PianoKeyboard *pk, int note)
{
GdkColor black = {0, 0, 0, 0};
GdkColor white = {0, 65535, 65535, 65535};
GdkGC *gc = GTK_WIDGET(pk)->style->fg_gc[0];
GtkWidget *widget;
int is_white = pk->notes[note].white;
int x = pk->notes[note].x;
int w = pk->notes[note].w;
int h = pk->notes[note].h;
if (pk->notes[note].pressed || pk->notes[note].sustained)
is_white = !is_white;
if (is_white)
gdk_gc_set_rgb_fg_color(gc, &white);
else
gdk_gc_set_rgb_fg_color(gc, &black);
gdk_draw_rectangle(GTK_WIDGET(pk)->window, gc, TRUE, x, 0, w, h);
gdk_gc_set_rgb_fg_color(gc, &black);
gdk_draw_rectangle(GTK_WIDGET(pk)->window, gc, FALSE, x, 0, w, h);
if (pk->enable_keyboard_cue)
draw_keyboard_cue(pk);
/* We need to redraw black keys that partially obscure the white one. */
if (note < NNOTES - 2 && !pk->notes[note + 1].white)
draw_note(pk, note + 1);
if (note > 0 && !pk->notes[note - 1].white)
draw_note(pk, note - 1);
/*
* XXX: This doesn't really belong here. Originally I wanted to pack PianoKeyboard into GtkFrame
* packed into GtkAlignment. I failed to make it behave the way I want. GtkFrame would need
* to adapt to the "proper" size of PianoKeyboard, i.e. to the useful_width, not allocated width;
* that didn't work.
*/
widget = GTK_WIDGET(pk);
gtk_paint_shadow(widget->style, widget->window, GTK_STATE_NORMAL, GTK_SHADOW_IN, NULL, widget, NULL, pk->widget_margin, 0,
widget->allocation.width - pk->widget_margin * 2 + 1, widget->allocation.height);
}
static int
press_key(PianoKeyboard *pk, int key)
{
assert(key >= 0);
assert(key < NNOTES);
pk->maybe_stop_sustained_notes = 0;
/* This is for keyboard autorepeat protection. */
if (pk->notes[key].pressed)
return 0;
if (pk->sustain_new_notes)
pk->notes[key].sustained = 1;
else
pk->notes[key].sustained = 0;
pk->notes[key].pressed = 1;
g_signal_emit_by_name(GTK_WIDGET(pk), "note-on", key);
draw_note(pk, key);
return 1;
}
static int
release_key(PianoKeyboard *pk, int key)
{
assert(key >= 0);
assert(key < NNOTES);
pk->maybe_stop_sustained_notes = 0;
if (!pk->notes[key].pressed)
return 0;
if (pk->sustain_new_notes)
pk->notes[key].sustained = 1;
pk->notes[key].pressed = 0;
if (pk->notes[key].sustained)
return 0;
g_signal_emit_by_name(GTK_WIDGET(pk), "note-off", key);
draw_note(pk, key);
return 1;
}
static void
stop_unsustained_notes(PianoKeyboard *pk)
{
int i;
for (i = 0; i < NNOTES; i++) {
if (pk->notes[i].pressed && !pk->notes[i].sustained) {
pk->notes[i].pressed = 0;
g_signal_emit_by_name(GTK_WIDGET(pk), "note-off", i);
draw_note(pk, i);
}
}
}
static void
stop_sustained_notes(PianoKeyboard *pk)
{
int i;
for (i = 0; i < NNOTES; i++) {
if (pk->notes[i].sustained) {
pk->notes[i].pressed = 0;
pk->notes[i].sustained = 0;
g_signal_emit_by_name(GTK_WIDGET(pk), "note-off", i);
draw_note(pk, i);
}
}
}
static int
key_binding(PianoKeyboard *pk, const char *key)
{
gpointer notused, note;
gboolean found;
assert(pk->key_bindings != NULL);
found = g_hash_table_lookup_extended(pk->key_bindings, key, &notused, &note);
if (!found)
return -1;
return (int)note;
}
static void
bind_key(PianoKeyboard *pk, const char *key, int note)
{
assert(pk->key_bindings != NULL);
g_hash_table_insert(pk->key_bindings, (gpointer)key, (gpointer)note);
}
static void
clear_notes(PianoKeyboard *pk)
{
assert(pk->key_bindings != NULL);
g_hash_table_remove_all(pk->key_bindings);
}
static void
bind_keys_qwerty(PianoKeyboard *pk)
{
clear_notes(pk);
/* Lower keyboard row - "zxcvbnm". */
bind_key(pk, "z", 12); /* C0 */
bind_key(pk, "s", 13);
bind_key(pk, "x", 14);
bind_key(pk, "d", 15);
bind_key(pk, "c", 16);
bind_key(pk, "v", 17);
bind_key(pk, "g", 18);
bind_key(pk, "b", 19);
bind_key(pk, "h", 20);
bind_key(pk, "n", 21);
bind_key(pk, "j", 22);
bind_key(pk, "m", 23);
/* Upper keyboard row, first octave - "qwertyu". */
bind_key(pk, "q", 24);
bind_key(pk, "2", 25);
bind_key(pk, "w", 26);
bind_key(pk, "3", 27);
bind_key(pk, "e", 28);
bind_key(pk, "r", 29);
bind_key(pk, "5", 30);
bind_key(pk, "t", 31);
bind_key(pk, "6", 32);
bind_key(pk, "y", 33);
bind_key(pk, "7", 34);
bind_key(pk, "u", 35);
/* Upper keyboard row, the rest - "iop". */
bind_key(pk, "i", 36);
bind_key(pk, "9", 37);
bind_key(pk, "o", 38);
bind_key(pk, "0", 39);
bind_key(pk, "p", 40);
}
static void
bind_keys_qwertz(PianoKeyboard *pk)
{
bind_keys_qwerty(pk);
/* The only difference between QWERTY and QWERTZ is that the "y" and "z" are swapped together. */
bind_key(pk, "y", 12);
bind_key(pk, "z", 33);
}
static void
bind_keys_azerty(PianoKeyboard *pk)
{
clear_notes(pk);
/* Lower keyboard row - "wxcvbn,". */
bind_key(pk, "w", 12); /* C0 */
bind_key(pk, "s", 13);
bind_key(pk, "x", 14);
bind_key(pk, "d", 15);
bind_key(pk, "c", 16);
bind_key(pk, "v", 17);
bind_key(pk, "g", 18);
bind_key(pk, "b", 19);
bind_key(pk, "h", 20);
bind_key(pk, "n", 21);
bind_key(pk, "j", 22);
bind_key(pk, "comma", 23);
/* Upper keyboard row, first octave - "azertyu". */
bind_key(pk, "a", 24);
bind_key(pk, "eacute", 25);
bind_key(pk, "z", 26);
bind_key(pk, "quotedbl", 27);
bind_key(pk, "e", 28);
bind_key(pk, "r", 29);
bind_key(pk, "parenleft", 30);
bind_key(pk, "t", 31);
bind_key(pk, "minus", 32);
bind_key(pk, "y", 33);
bind_key(pk, "egrave", 34);
bind_key(pk, "u", 35);
/* Upper keyboard row, the rest - "iop". */
bind_key(pk, "i", 36);
bind_key(pk, "ccedilla", 37);
bind_key(pk, "o", 38);
bind_key(pk, "agrave", 39);
bind_key(pk, "p", 40);
}
static gint
keyboard_event_handler(GtkWidget *mk, GdkEventKey *event, gpointer notused)
{
int note;
char *key;
guint keyval;
GdkKeymapKey kk;
PianoKeyboard *pk = PIANO_KEYBOARD(mk);
/* We're not using event->keyval, because we need keyval with level set to 0.
E.g. if user holds Shift and presses '7', we want to get a '7', not '&'. */
kk.keycode = event->hardware_keycode;
kk.level = 0;
kk.group = 0;
keyval = gdk_keymap_lookup_key(NULL, &kk);
key = gdk_keyval_name(gdk_keyval_to_lower(keyval));
if (key == NULL) {
g_message("gtk_keyval_name() returned NULL; please report this.");
return FALSE;
}
note = key_binding(pk, key);
if (note < 0) {
/* Key was not bound. Maybe it's one of the keys handled in jack-keyboard.c. */
return FALSE;
}
note += pk->octave * 12;
assert(note >= 0);
assert(note < NNOTES);
if (event->type == GDK_KEY_PRESS) {
press_key(pk, note);
} else if (event->type == GDK_KEY_RELEASE) {
release_key(pk, note);
}
return TRUE;
}
static int
get_note_for_xy(PianoKeyboard *pk, int x, int y)
{
int height = GTK_WIDGET(pk)->allocation.height;
int note;
if (y <= height / 2) {
for (note = 0; note < NNOTES - 1; note++) {
if (pk->notes[note].white)
continue;
if (x >= pk->notes[note].x && x <= pk->notes[note].x + pk->notes[note].w)
return note;
}
}
for (note = 0; note < NNOTES - 1; note++) {
if (!pk->notes[note].white)
continue;
if (x >= pk->notes[note].x && x <= pk->notes[note].x + pk->notes[note].w)
return note;
}
return -1;
}
static gboolean
mouse_button_event_handler(PianoKeyboard *pk, GdkEventButton *event, gpointer notused)
{
int x = event->x;
int y = event->y;
int note = get_note_for_xy(pk, x, y);
if (event->button != 1)
return TRUE;
if (event->type == GDK_BUTTON_PRESS) {
/* This is possible when you make the window a little wider and then click
on the grey area. */
if (note < 0) {
return TRUE;
}
if (pk->note_being_pressed_using_mouse >= 0)
release_key(pk, pk->note_being_pressed_using_mouse);
press_key(pk, note);
pk->note_being_pressed_using_mouse = note;
} else if (event->type == GDK_BUTTON_RELEASE) {
if (note >= 0) {
release_key(pk, note);
} else {
if (pk->note_being_pressed_using_mouse >= 0)
release_key(pk, pk->note_being_pressed_using_mouse);
}
pk->note_being_pressed_using_mouse = -1;
}
return TRUE;
}
static gboolean
mouse_motion_event_handler(PianoKeyboard *pk, GdkEventMotion *event, gpointer notused)
{
int note;
if ((event->state & GDK_BUTTON1_MASK) == 0)
return TRUE;
note = get_note_for_xy(pk, event->x, event->y);
if (note != pk->note_being_pressed_using_mouse && note >= 0) {
if (pk->note_being_pressed_using_mouse >= 0)
release_key(pk, pk->note_being_pressed_using_mouse);
press_key(pk, note);
pk->note_being_pressed_using_mouse = note;
}
return TRUE;
}
static gboolean
piano_keyboard_expose(GtkWidget *widget, GdkEventExpose *event)
{
int i;
PianoKeyboard *pk = PIANO_KEYBOARD(widget);
for (i = 0; i < NNOTES; i++)
draw_note(pk, i);
return TRUE;
}
static void
piano_keyboard_size_request(GtkWidget *widget, GtkRequisition *requisition)
{
requisition->width = PIANO_KEYBOARD_DEFAULT_WIDTH;
requisition->height = PIANO_KEYBOARD_DEFAULT_HEIGHT;
}
static void
recompute_dimensions(PianoKeyboard *pk)
{
int number_of_white_keys = (NNOTES - 1) * (7.0 / 12.0);
int key_width;
int black_key_width;
int useful_width;
int note;
int white_key = 0;
int note_in_octave;
int width = GTK_WIDGET(pk)->allocation.width;
int height = GTK_WIDGET(pk)->allocation.height;
key_width = width / number_of_white_keys;
black_key_width = key_width * 0.8;
useful_width = number_of_white_keys * key_width;
pk->widget_margin = (width - useful_width) / 2;
for (note = 0, white_key = 0; note < NNOTES - 2; note++) {
note_in_octave = note % 12;
if (note_in_octave == 1 || note_in_octave == 3 || note_in_octave == 6 ||
note_in_octave == 8 || note_in_octave == 10) {
/* This note is black key. */
pk->notes[note].x = pk->widget_margin + white_key * key_width - black_key_width / 2;
pk->notes[note].w = black_key_width;
pk->notes[note].h = height / 2;
pk->notes[note].white = 0;
continue;
}
/* This note is white key. */
pk->notes[note].x = pk->widget_margin + white_key * key_width;
pk->notes[note].w = key_width;
pk->notes[note].h = height;
pk->notes[note].white = 1;
white_key++;
}
}
static void
piano_keyboard_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
{
/* XXX: Are these two needed? */
g_return_if_fail(widget != NULL);
g_return_if_fail(allocation != NULL);
widget->allocation = *allocation;
recompute_dimensions(PIANO_KEYBOARD(widget));
if (GTK_WIDGET_REALIZED(widget)) {
gdk_window_move_resize (widget->window, allocation->x, allocation->y, allocation->width, allocation->height);
}
}
static void
piano_keyboard_class_init(PianoKeyboardClass *klass)
{
GtkWidgetClass *widget_klass;
/* Set up signals. */
piano_keyboard_signals[NOTE_ON_SIGNAL] = g_signal_new ("note-on",
G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
0, NULL, NULL, g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
piano_keyboard_signals[NOTE_OFF_SIGNAL] = g_signal_new ("note-off",
G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
0, NULL, NULL, g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
widget_klass = (GtkWidgetClass*) klass;
widget_klass->expose_event = piano_keyboard_expose;
widget_klass->size_request = piano_keyboard_size_request;
widget_klass->size_allocate = piano_keyboard_size_allocate;
}
static void
piano_keyboard_init(GtkWidget *mk)
{
gtk_widget_add_events(mk, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK);
g_signal_connect(G_OBJECT(mk), "button-press-event", G_CALLBACK(mouse_button_event_handler), NULL);
g_signal_connect(G_OBJECT(mk), "button-release-event", G_CALLBACK(mouse_button_event_handler), NULL);
g_signal_connect(G_OBJECT(mk), "motion-notify-event", G_CALLBACK(mouse_motion_event_handler), NULL);
g_signal_connect(G_OBJECT(mk), "key-press-event", G_CALLBACK(keyboard_event_handler), NULL);
g_signal_connect(G_OBJECT(mk), "key-release-event", G_CALLBACK(keyboard_event_handler), NULL);
}
GType
piano_keyboard_get_type(void)
{
static GType mk_type = 0;
if (!mk_type) {
static const GTypeInfo mk_info = {
sizeof(PianoKeyboardClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) piano_keyboard_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (PianoKeyboard),
0, /* n_preallocs */
(GInstanceInitFunc) piano_keyboard_init,
};
mk_type = g_type_register_static(GTK_TYPE_DRAWING_AREA, "PianoKeyboard", &mk_info, 0);
}
return mk_type;
}
GtkWidget *
piano_keyboard_new(void)
{
GtkWidget *widget = gtk_type_new(piano_keyboard_get_type());
PianoKeyboard *pk = PIANO_KEYBOARD(widget);
pk->maybe_stop_sustained_notes = 0;
pk->sustain_new_notes = 0;
pk->enable_keyboard_cue = 0;
pk->octave = 4;
pk->note_being_pressed_using_mouse = -1;
memset((void *)pk->notes, 0, sizeof(struct Note) * NNOTES);
pk->key_bindings = g_hash_table_new(g_str_hash, g_str_equal);
bind_keys_qwerty(pk);
return widget;
}
void
piano_keyboard_set_keyboard_cue(PianoKeyboard *pk, int enabled)
{
pk->enable_keyboard_cue = enabled;
}
void
piano_keyboard_sustain_press(PianoKeyboard *pk)
{
if (!pk->sustain_new_notes) {
pk->sustain_new_notes = 1;
pk->maybe_stop_sustained_notes = 1;
}
}
void
piano_keyboard_sustain_release(PianoKeyboard *pk)
{
if (pk->maybe_stop_sustained_notes)
stop_sustained_notes(pk);
pk->sustain_new_notes = 0;
}
void
piano_keyboard_set_note_on(PianoKeyboard *pk, int note)
{
if (pk->notes[note].pressed == 0) {
pk->notes[note].pressed = 1;
draw_note(pk, note);
}
}
void
piano_keyboard_set_note_off(PianoKeyboard *pk, int note)
{
if (pk->notes[note].pressed || pk->notes[note].sustained) {
pk->notes[note].pressed = 0;
pk->notes[note].sustained = 0;
draw_note(pk, note);
}
}
void
piano_keyboard_set_octave(PianoKeyboard *pk, int octave)
{
stop_unsustained_notes(pk);
pk->octave = octave;
gtk_widget_queue_draw(GTK_WIDGET(pk));
}
gboolean
piano_keyboard_set_keyboard_layout(PianoKeyboard *pk, const char *layout)
{
assert(layout);
if (!strcasecmp(layout, "QWERTY")) {
bind_keys_qwerty(pk);
} else if (!strcasecmp(layout, "QWERTZ")) {
bind_keys_qwertz(pk);
} else if (!strcasecmp(layout, "AZERTY")) {
bind_keys_azerty(pk);
} else {
/* Unknown layout name. */
return TRUE;
}
return FALSE;
}

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#ifndef __PIANO_KEYBOARD_H__
#define __PIANO_KEYBOARD_H__
#include <glib.h>
#include <gtk/gtkdrawingarea.h>
G_BEGIN_DECLS
#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 IS_PIANO_KEYBOARD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TYPE_PIANO_KEYBOARD))
#define IS_PIANO_KEYBOARD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TYPE_PIANO_KEYBOARD))
#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);
G_END_DECLS
#endif /* __PIANO_KEYBOARD_H__ */