diff options
author | Paul Davis <paul@linuxaudiosystems.com> | 2010-08-02 21:52:21 +0000 |
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committer | Paul Davis <paul@linuxaudiosystems.com> | 2010-08-02 21:52:21 +0000 |
commit | e0edca5a2abd65d869348e4bddb9d07ecc156450 (patch) | |
tree | 3ebb98c670729ee017b4245c4e003f2d013df773 /gtk2_ardour/gtk_pianokeyboard.c | |
parent | 8b0354f91003582c4eafc4f2e1ef7ab2daba22e7 (diff) |
first, incomplete pass at step entry dialog, along with various SVG and PNG files for notes and dynamics notation
git-svn-id: svn://localhost/ardour2/branches/3.0@7529 d708f5d6-7413-0410-9779-e7cbd77b26cf
Diffstat (limited to 'gtk2_ardour/gtk_pianokeyboard.c')
-rw-r--r-- | gtk2_ardour/gtk_pianokeyboard.c | 688 |
1 files changed, 688 insertions, 0 deletions
diff --git a/gtk2_ardour/gtk_pianokeyboard.c b/gtk2_ardour/gtk_pianokeyboard.c new file mode 100644 index 0000000000..58e742e32c --- /dev/null +++ b/gtk2_ardour/gtk_pianokeyboard.c @@ -0,0 +1,688 @@ +/*- + * Copyright (c) 2007, 2008 Edward Tomasz NapieraĆa <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 <strings.h> +#include <stdint.h> +#include <gtk/gtk.h> +#include <gdk/gdkkeysyms.h> + +#include "gtk_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, ¬used, ¬e); + + 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, (gpointer)key, (gpointer)((intptr_t)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; +} + |