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livetrax/gtk2_ardour/gtk_pianokeyboard.c

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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 <math.h>
#include <stdint.h>
#include <string.h>
#include <cairo/cairo.h>
# include <pango/pango.h>
#include <pango/pangocairo.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>
#include "gtk_pianokeyboard.h"
#ifndef MIN
# define MIN(A, B) ((A) < (B)) ? (A) : (B)
#endif
#ifndef MAX
# define MAX(A, B) ((A) > (B)) ? (A) : (B)
#endif
#define PIANO_KEYBOARD_DEFAULT_WIDTH 730
#define PIANO_KEYBOARD_DEFAULT_HEIGHT 70
enum {
NOTE_ON_SIGNAL,
NOTE_OFF_SIGNAL,
REST_SIGNAL,
LAST_SIGNAL
};
static guint piano_keyboard_signals[LAST_SIGNAL] = { 0 };
static void
draw_keyboard_cue (PianoKeyboard* pk, cairo_t* cr, int note)
{
#if 0
int w = pk->notes[0].w;
int h = pk->notes[0].h;
int first_note_in_lower_row = (pk->octave + 1) * 12;
int last_note_in_lower_row = (pk->octave + 2) * 12 - 1;
int first_note_in_higher_row = (pk->octave + 2) * 12;
int last_note_in_higher_row = (pk->octave + 3) * 12 + 4;
first_note_in_lower_row = MIN (127, MAX (0, first_note_in_lower_row));
last_note_in_lower_row = MIN (127, MAX (0, last_note_in_lower_row));
first_note_in_higher_row = MIN (127, MAX (0, first_note_in_higher_row));
last_note_in_higher_row = MIN (127, MAX (0, last_note_in_higher_row));
cairo_set_source_rgb (cr, 1.0f, 0.0f, 0.0f);
cairo_move_to (cr, pk->notes[first_note_in_lower_row].x + 3, h - 6);
cairo_line_to (cr, pk->notes[last_note_in_lower_row].x + w - 3, h - 6);
cairo_stroke (cr);
cairo_set_source_rgb (cr, 0.0f, 0.0f, 1.0f);
cairo_move_to (cr, pk->notes[first_note_in_higher_row].x + 3, h - 9);
cairo_line_to (cr, pk->notes[last_note_in_higher_row].x + w - 3, h - 9);
cairo_stroke (cr);
#endif
int nkey = note - pk->octave * 12;
if (nkey < 0 || nkey >= NNOTES) {
return;
}
if (!pk->note_bindings[nkey]) {
return;
}
// TODO Cache PangoFontDescription for each expose call.
// TODO display above note/octave label if both are visible
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;
int tw, th;
char buf[32];
sprintf (buf, "ArdourMono %dpx", MAX (8, MIN (20, w / 2 + 3)));
PangoFontDescription* font = pango_font_description_from_string (buf);
snprintf(buf, 16, "%lc", gdk_keyval_to_unicode (gdk_keyval_to_upper (gdk_keyval_from_name (pk->note_bindings[nkey]))));
PangoLayout* pl = pango_cairo_create_layout (cr);
pango_layout_set_font_description (pl, font);
pango_layout_set_text (pl, buf, -1);
pango_layout_set_alignment (pl, PANGO_ALIGN_LEFT);
pango_layout_get_pixel_size (pl, &tw, &th);
if (is_white) {
cairo_set_source_rgba (cr, 0.0, 0.0, 0.5, 1.0);
} else {
cairo_set_source_rgba (cr, 1.0, 1.0, 0.5, 1.0);
}
if (tw < w) {
cairo_save (cr);
cairo_move_to (cr, x + (w - tw) / 2, h - th - 5);
pango_cairo_show_layout (cr, pl);
cairo_restore (cr);
}
g_object_unref (pl);
pango_font_description_free (font);
}
static void
queue_note_draw (PianoKeyboard* pk, int note)
{
GdkWindow* w = GTK_WIDGET (pk)->window;
if (w) {
GdkRectangle r;
r.x = pk->notes[note].x;
r.y = 0;
r.width = pk->notes[note].w;
r.height = pk->notes[note].h;
gdk_window_invalidate_rect (w, &r, TRUE);
}
}
static void
draw_note (PianoKeyboard* pk, cairo_t* cr, int note)
{
if (note < pk->min_note || note > pk->max_note) {
return;
}
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) {
if (is_white) {
cairo_set_source_rgb (cr, 0.7, 0.5, 0.5);
} else {
cairo_set_source_rgb (cr, 0.6, 0.4, 0.4);
}
} else if (pk->highlight_grand_piano_range && (note < PIANO_MIN_NOTE || note > PIANO_MAX_NOTE)) {
if (is_white) {
cairo_set_source_rgb (cr, 0.7, 0.7, 0.7);
} else {
cairo_set_source_rgb (cr, 0.3, 0.3, 0.3);
}
} else {
if (is_white) {
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
} else {
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
}
}
cairo_set_line_width (cr, 1.0);
cairo_rectangle (cr, x, 0, w, h);
cairo_fill (cr);
cairo_set_source_rgb (cr, 0.0f, 0.0f, 0.0f); /* black outline */
cairo_rectangle (cr, x, 0, w, h);
cairo_stroke (cr);
if (pk->enable_keyboard_cue) {
draw_keyboard_cue (pk, cr, note);
}
else if (pk->print_note_label && (note % 12) == 0) {
int tw, th;
char buf[32];
sprintf (buf, "ArdourMono %dpx", MAX (10, MIN (20, MIN (w / 2 + 3, h / 7))));
PangoFontDescription* font = pango_font_description_from_string (buf);
sprintf (buf, "C%2d", (note / 12) - 1);
PangoLayout* pl = pango_cairo_create_layout (cr);
pango_layout_set_font_description (pl, font);
pango_layout_set_text (pl, buf, -1);
pango_layout_set_alignment (pl, PANGO_ALIGN_LEFT);
pango_layout_get_pixel_size (pl, &tw, &th);
if (th < w && tw < h * .3) {
cairo_save (cr);
cairo_move_to (cr, x + (w - th) / 2, h - 3);
cairo_rotate (cr, M_PI / -2.0);
cairo_set_source_rgba (cr, .0, .0, .0, 1.0);
pango_cairo_show_layout (cr, pl);
cairo_restore (cr);
}
g_object_unref (pl);
pango_font_description_free (font);
}
/* We need to redraw black keys that partially obscure the white one. */
if (note < NNOTES - 2 && !pk->notes[note + 1].white) {
draw_note (pk, cr, note + 1);
}
if (note > 0 && !pk->notes[note - 1].white) {
draw_note (pk, cr, note - 1);
}
}
static int
press_key (PianoKeyboard* pk, int key, int vel)
{
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;
if (pk->monophonic && pk->last_key != key) {
pk->notes[pk->last_key].pressed = 0;
pk->notes[pk->last_key].sustained = 0;
queue_note_draw (pk, pk->last_key);
}
pk->last_key = key;
pk->notes[key].pressed = 1;
g_signal_emit_by_name (GTK_WIDGET (pk), "note-on", key, vel);
queue_note_draw (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);
queue_note_draw (pk, key);
return 1;
}
static void
rest (PianoKeyboard* pk)
{
g_signal_emit_by_name (GTK_WIDGET (pk), "rest");
}
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);
queue_note_draw (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);
queue_note_draw (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 (intptr_t)note;
}
static void
bind_key (PianoKeyboard* pk, const char* key, int note)
{
assert (pk->key_bindings != NULL);
g_hash_table_insert (pk->key_bindings, (const gpointer)key, (gpointer) ((intptr_t)note));
pk->note_bindings[note] = key;
}
static void
clear_notes (PianoKeyboard* pk)
{
assert (pk->key_bindings != NULL);
g_hash_table_remove_all (pk->key_bindings);
memset (pk->note_bindings, 0, sizeof (pk->note_bindings));
}
static void
bind_keys_qwerty (PianoKeyboard* pk)
{
clear_notes (pk);
bind_key (pk, "space", 128);
/* 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);
bind_key (pk, "space", 128);
/* 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 void
bind_keys_dvorak (PianoKeyboard* pk)
{
clear_notes (pk);
bind_key (pk, "space", 128);
/* Lower keyboard row - ";qjkxbm". */
bind_key (pk, "semicolon", 12); /* C0 */
bind_key (pk, "o", 13);
bind_key (pk, "q", 14);
bind_key (pk, "e", 15);
bind_key (pk, "j", 16);
bind_key (pk, "k", 17);
bind_key (pk, "i", 18);
bind_key (pk, "x", 19);
bind_key (pk, "d", 20);
bind_key (pk, "b", 21);
bind_key (pk, "h", 22);
bind_key (pk, "m", 23);
bind_key (pk, "w", 24); /* overlaps with upper row */
bind_key (pk, "n", 25);
bind_key (pk, "v", 26);
bind_key (pk, "s", 27);
bind_key (pk, "z", 28);
/* Upper keyboard row, first octave - "',.pyfg". */
bind_key (pk, "apostrophe", 24);
bind_key (pk, "2", 25);
bind_key (pk, "comma", 26);
bind_key (pk, "3", 27);
bind_key (pk, "period", 28);
bind_key (pk, "p", 29);
bind_key (pk, "5", 30);
bind_key (pk, "y", 31);
bind_key (pk, "6", 32);
bind_key (pk, "f", 33);
bind_key (pk, "7", 34);
bind_key (pk, "g", 35);
/* Upper keyboard row, the rest - "crl". */
bind_key (pk, "c", 36);
bind_key (pk, "9", 37);
bind_key (pk, "r", 38);
bind_key (pk, "0", 39);
bind_key (pk, "l", 40);
#if 0
bind_key(pk, "slash", 41); /* extra F */
bind_key(pk, "bracketright", 42);
bind_key(pk, "equal", 43);
#endif
}
static gint
keyboard_event_handler (GtkWidget* mk, GdkEventKey* event, gpointer ignored)
{
int note;
char* key;
guint keyval;
GdkKeymapKey kk;
PianoKeyboard* pk = PIANO_KEYBOARD (mk);
(void)ignored;
/* 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) {
return FALSE;
}
if (note == 128) {
if (event->type == GDK_KEY_RELEASE) {
rest (pk);
}
return TRUE;
}
note += pk->octave * 12;
assert (note >= 0);
assert (note < NNOTES);
if (event->type == GDK_KEY_PRESS) {
press_key (pk, note, pk->key_velocity);
} 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) / 3)) { /* might be a black key */
for (note = 0; note <= pk->max_note; ++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 <= pk->max_note; ++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 int
get_velocity_for_note_at_y (PianoKeyboard* pk, int note, int y)
{
if (note < 0) {
return 0;
}
int vel = pk->min_velocity + (pk->max_velocity - pk->min_velocity) * y / pk->notes[note].h;
if (vel < 1) {
return 1;
} else if (vel > 127) {
return 127;
}
return vel;
}
static gboolean
mouse_button_event_handler (PianoKeyboard* pk, GdkEventButton* event, gpointer ignored)
{
int x = event->x;
int y = event->y;
int note = get_note_for_xy (pk, x, y);
(void)ignored;
if (event->button != 1)
return TRUE;
if (event->type == GDK_BUTTON_PRESS) {
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, get_velocity_for_note_at_y (pk, note, y));
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 ignored)
{
int note;
(void)ignored;
if ((event->state & GDK_BUTTON1_MASK) == 0)
return TRUE;
int x = event->x;
int y = event->y;
note = get_note_for_xy (pk, x, 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, get_velocity_for_note_at_y (pk, note, y));
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);
cairo_t* cr = gdk_cairo_create (GDK_DRAWABLE (GTK_WIDGET (pk)->window));
gdk_cairo_region (cr, event->region);
cairo_clip (cr);
for (i = 0; i < NNOTES; ++i) {
GdkRectangle r;
r.x = pk->notes[i].x;
r.y = 0;
r.width = pk->notes[i].w;
r.height = pk->notes[i].h;
switch (gdk_region_rect_in (event->region, &r)) {
case GDK_OVERLAP_RECTANGLE_PART:
case GDK_OVERLAP_RECTANGLE_IN:
draw_note (pk, cr, i);
break;
default:
break;
}
}
cairo_destroy (cr);
return TRUE;
}
static void
piano_keyboard_size_request (GtkWidget* w, GtkRequisition* requisition)
{
(void)w;
requisition->width = PIANO_KEYBOARD_DEFAULT_WIDTH;
requisition->height = PIANO_KEYBOARD_DEFAULT_HEIGHT;
}
static int
is_black (int key)
{
int note_in_octave = key % 12;
switch (note_in_octave) {
case 1:
case 3:
case 6:
case 8:
case 10:
return 1;
default:
return 0;
}
return 0;
}
static double
black_key_left_shift (int key)
{
int note_in_octave = key % 12;
switch (note_in_octave) {
case 1:
return 2.0 / 3.0;
case 3:
return 1.0 / 3.0;
case 6:
return 2.0 / 3.0;
case 8:
return 0.5;
case 10:
return 1.0 / 3.0;
default:
return 0;
}
return 0;
}
static void
recompute_dimensions (PianoKeyboard* pk)
{
int note;
int number_of_white_keys = 0;
int skipped_white_keys = 0;
for (note = pk->min_note; note <= pk->max_note; ++note) {
if (!is_black (note)) {
++number_of_white_keys;
}
}
for (note = 0; note < pk->min_note; ++note) {
if (!is_black (note)) {
++skipped_white_keys;
}
}
int width = GTK_WIDGET (pk)->allocation.width;
int height = GTK_WIDGET (pk)->allocation.height;
int key_width = width / number_of_white_keys;
int black_key_width = key_width * 0.8;
int useful_width = number_of_white_keys * key_width;
pk->widget_margin = (width - useful_width) / 2;
int white_key;
for (note = 0, white_key = -skipped_white_keys; note < NNOTES; ++note) {
if (is_black (note)) {
/* This note is black key. */
pk->notes[note].x = pk->widget_margin +
(white_key * key_width) -
(black_key_width * black_key_left_shift (note));
pk->notes[note].w = black_key_width;
pk->notes[note].h = (height * 2) / 3;
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);
}
}
typedef void (*GMarshalFunc_VOID__INT_INT) (gpointer data1,
gint arg1,
gint arg2,
gpointer data2);
static void
g_cclosure_user_marshal_VOID__INT_INT (GClosure* closure,
GValue* return_value G_GNUC_UNUSED,
guint n_param_values,
const GValue* param_values,
gpointer invocation_hint G_GNUC_UNUSED,
gpointer marshal_data)
{
GCClosure* cc = (GCClosure*)closure;
gpointer data1, data2;
GMarshalFunc_VOID__INT_INT callback;
g_return_if_fail (n_param_values == 3);
if (G_CCLOSURE_SWAP_DATA (closure)) {
data1 = closure->data;
data2 = g_value_peek_pointer (param_values + 0);
} else {
data1 = g_value_peek_pointer (param_values + 0);
data2 = closure->data;
}
callback = (GMarshalFunc_VOID__INT_INT) (marshal_data ? marshal_data : cc->callback);
callback (data1,
(param_values + 1)->data[0].v_int,
(param_values + 2)->data[0].v_int,
data2);
}
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), (GSignalFlags) (G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION),
0, NULL, NULL, g_cclosure_user_marshal_VOID__INT_INT, G_TYPE_NONE, 2, G_TYPE_INT, G_TYPE_INT);
piano_keyboard_signals[NOTE_OFF_SIGNAL] = g_signal_new ("note-off",
G_TYPE_FROM_CLASS (klass), (GSignalFlags) (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[REST_SIGNAL] = g_signal_new ("rest",
G_TYPE_FROM_CLASS (klass), (GSignalFlags) (G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION),
0, NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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,
0, /* value_table */
};
mk_type = g_type_register_static (GTK_TYPE_DRAWING_AREA, "PianoKeyboard", &mk_info, (GTypeFlags)0);
}
return mk_type;
}
GtkWidget*
piano_keyboard_new (void)
{
GtkWidget* widget = (GtkWidget*)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 = FALSE;
pk->highlight_grand_piano_range = FALSE;
pk->print_note_label = FALSE;
pk->octave = 4;
pk->octave_range = 7;
pk->note_being_pressed_using_mouse = -1;
pk->min_note = 0;
pk->max_note = 127;
pk->last_key = 0;
pk->monophonic = FALSE;
pk->min_velocity = 1;
pk->max_velocity = 127;
pk->key_velocity = 100;
memset ((void*)pk->notes, 0, sizeof (struct PKNote) * 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, gboolean enabled)
{
pk->enable_keyboard_cue = enabled;
gtk_widget_queue_draw (GTK_WIDGET (pk));
}
void
piano_keyboard_set_grand_piano_highlight (PianoKeyboard* pk, gboolean enabled)
{
pk->highlight_grand_piano_range = enabled;
gtk_widget_queue_draw (GTK_WIDGET (pk));
}
void
piano_keyboard_show_note_label (PianoKeyboard* pk, gboolean enabled)
{
pk->print_note_label = enabled;
gtk_widget_queue_draw (GTK_WIDGET (pk));
}
void
piano_keyboard_set_monophonic (PianoKeyboard* pk, gboolean monophonic)
{
pk->monophonic = monophonic;
}
void
piano_keyboard_set_velocities (PianoKeyboard* pk, int min_vel, int max_vel, int key_vel)
{
if (min_vel <= max_vel && min_vel > 0 && max_vel < 128) {
pk->min_velocity = min_vel;
pk->max_velocity = max_vel;
}
if (key_vel > 0 && key_vel < 128) {
pk->key_velocity = key_vel;
}
}
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;
queue_note_draw (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;
queue_note_draw (pk, note);
}
}
void
piano_keyboard_set_octave (PianoKeyboard* pk, int octave)
{
stop_unsustained_notes (pk);
if (pk->octave < -1) {
pk->octave = -1;
} else if (pk->octave > 7) {
pk->octave = 7;
}
pk->octave = octave;
piano_keyboard_set_octave_range (pk, pk->octave_range);
gtk_widget_queue_draw (GTK_WIDGET (pk));
}
void
piano_keyboard_set_octave_range (PianoKeyboard* pk, int octave_range)
{
stop_unsustained_notes (pk);
if (octave_range < 2) {
octave_range = 2;
}
if (octave_range > 11) {
octave_range = 11;
}
pk->octave_range = octave_range;
/* -1 <= pk->octave <= 7
* key-bindings are at offset 12 .. 40
* default piano range: octave = 4, range = 7 -> note 21..108
*/
switch (octave_range) {
default:
assert (0);
break;
case 2:
case 3:
pk->min_note = (pk->octave + 1) * 12;
break;
case 4:
case 5:
pk->min_note = (pk->octave + 0) * 12;
break;
case 6:
pk->min_note = (pk->octave - 1) * 12;
break;
case 7:
case 8:
pk->min_note = (pk->octave - 2) * 12;
break;
case 9:
case 10:
pk->min_note = (pk->octave - 3) * 12;
break;
case 11:
pk->min_note = (pk->octave - 4) * 12;
break;
}
int upper_offset = 0;
if (pk->min_note < 3) {
upper_offset = 0;
pk->min_note = 0;
} else if (octave_range > 5) {
/* extend down to A */
upper_offset = 3;
pk->min_note -= 3;
}
pk->max_note = MIN (127, upper_offset + pk->min_note + octave_range * 12);
if (pk->max_note == 127) {
pk->min_note = MAX (0, pk->max_note - octave_range * 12);
}
recompute_dimensions (pk);
gtk_widget_queue_draw (GTK_WIDGET (pk));
}
void
piano_keyboard_set_keyboard_layout (PianoKeyboard* pk, const char* layout)
{
assert (layout);
if (!g_ascii_strcasecmp (layout, "QWERTY")) {
bind_keys_qwerty (pk);
} else if (!g_ascii_strcasecmp (layout, "QWERTZ")) {
bind_keys_qwertz (pk);
} else if (!g_ascii_strcasecmp (layout, "AZERTY")) {
bind_keys_azerty (pk);
} else if (!g_ascii_strcasecmp (layout, "DVORAK")) {
bind_keys_dvorak (pk);
} else {
assert (0);
}
gtk_widget_queue_draw (GTK_WIDGET (pk));
}
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