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livetrax/gtk2_ardour/piano_roll_header.cc

675 lines
16 KiB
C++

/*
Copyright (C) 2008 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <iostream>
#include "evoral/midi_events.h"
#include "ardour/midi_track.h"
#include "piano_roll_header.h"
#include "midi_time_axis.h"
#include "midi_streamview.h"
const int no_note = 0xff;
using namespace std;
PianoRollHeader::Color PianoRollHeader::white = PianoRollHeader::Color(0.77f, 0.78f, 0.76f);
PianoRollHeader::Color PianoRollHeader::white_highlight = PianoRollHeader::Color(0.87f, 0.88f, 0.86f);
PianoRollHeader::Color PianoRollHeader::white_shade_light = PianoRollHeader::Color(0.95f, 0.95f, 0.95f);
PianoRollHeader::Color PianoRollHeader::white_shade_dark = PianoRollHeader::Color(0.56f, 0.56f, 0.56f);
PianoRollHeader::Color PianoRollHeader::black = PianoRollHeader::Color(0.24f, 0.24f, 0.24f);
PianoRollHeader::Color PianoRollHeader::black_highlight = PianoRollHeader::Color(0.30f, 0.30f, 0.30f);
PianoRollHeader::Color PianoRollHeader::black_shade_light = PianoRollHeader::Color(0.46f, 0.46f, 0.46f);
PianoRollHeader::Color PianoRollHeader::black_shade_dark = PianoRollHeader::Color(0.1f, 0.1f, 0.1f);
PianoRollHeader::Color::Color()
: r(1.0f)
, g(1.0f)
, b(1.0f)
{
}
PianoRollHeader::Color::Color(double _r, double _g, double _b)
: r(_r)
, g(_g)
, b(_b)
{
}
inline void
PianoRollHeader::Color::set(const PianoRollHeader::Color& c)
{
r = c.r;
g = c.g;
b = c.b;
}
PianoRollHeader::PianoRollHeader(MidiStreamView& v)
: _view(v)
, _highlighted_note(no_note)
, _clicked_note(no_note)
, _dragging(false)
{
add_events (Gdk::BUTTON_PRESS_MASK |
Gdk::BUTTON_RELEASE_MASK |
Gdk::POINTER_MOTION_MASK |
Gdk::ENTER_NOTIFY_MASK |
Gdk::LEAVE_NOTIFY_MASK |
Gdk::SCROLL_MASK);
for (int i = 0; i < 128; ++i) {
_active_notes[i] = false;
}
_view.NoteRangeChanged.connect (mem_fun (*this, &PianoRollHeader::note_range_changed));
}
inline void
create_path(Cairo::RefPtr<Cairo::Context> cr, double x[], double y[], int start, int stop)
{
cr->move_to(x[start], y[start]);
for (int i = start+1; i <= stop; ++i) {
cr->line_to(x[i], y[i]);
}
}
inline void
render_rect(Cairo::RefPtr<Cairo::Context> cr, int /*note*/, double x[], double y[],
PianoRollHeader::Color& bg, PianoRollHeader::Color& tl_shadow, PianoRollHeader::Color& br_shadow)
{
cr->set_source_rgb(bg.r, bg.g, bg.b);
create_path(cr, x, y, 0, 4);
cr->fill();
cr->set_source_rgb(tl_shadow.r, tl_shadow.g, tl_shadow.b);
create_path(cr, x, y, 0, 2);
cr->stroke();
cr->set_source_rgb(br_shadow.r, br_shadow.g, br_shadow.b);
create_path(cr, x, y, 2, 4);
cr->stroke();
}
inline void
render_cf(Cairo::RefPtr<Cairo::Context> cr, int /*note*/, double x[], double y[],
PianoRollHeader::Color& bg, PianoRollHeader::Color& tl_shadow, PianoRollHeader::Color& br_shadow)
{
cr->set_source_rgb(bg.r, bg.g, bg.b);
create_path(cr, x, y, 0, 6);
cr->fill();
cr->set_source_rgb(tl_shadow.r, tl_shadow.g, tl_shadow.b);
create_path(cr, x, y, 0, 4);
cr->stroke();
cr->set_source_rgb(br_shadow.r, br_shadow.g, br_shadow.b);
create_path(cr, x, y, 4, 6);
cr->stroke();
}
inline void
render_eb(Cairo::RefPtr<Cairo::Context> cr, int /*note*/, double x[], double y[],
PianoRollHeader::Color& bg, PianoRollHeader::Color& tl_shadow, PianoRollHeader::Color& br_shadow)
{
cr->set_source_rgb(bg.r, bg.g, bg.b);
create_path(cr, x, y, 0, 6);
cr->fill();
cr->set_source_rgb(tl_shadow.r, tl_shadow.g, tl_shadow.b);
create_path(cr, x, y, 0, 2);
cr->stroke();
create_path(cr, x, y, 4, 5);
cr->stroke();
cr->set_source_rgb(br_shadow.r, br_shadow.g, br_shadow.b);
create_path(cr, x, y, 2, 4);
cr->stroke();
create_path(cr, x, y, 5, 6);
cr->stroke();
}
inline void
render_dga(Cairo::RefPtr<Cairo::Context> cr, int /*note*/, double x[], double y[],
PianoRollHeader::Color& bg, PianoRollHeader::Color& tl_shadow, PianoRollHeader::Color& br_shadow)
{
cr->set_source_rgb(bg.r, bg.g, bg.b);
create_path(cr, x, y, 0, 8);
cr->fill();
cr->set_source_rgb(tl_shadow.r, tl_shadow.g, tl_shadow.b);
create_path(cr, x, y, 0, 4);
cr->stroke();
create_path(cr, x, y, 6, 7);
cr->stroke();
cr->set_source_rgb(br_shadow.r, br_shadow.g, br_shadow.b);
create_path(cr, x, y, 4, 6);
cr->stroke();
create_path(cr, x, y, 7, 8);
cr->stroke();
}
void
PianoRollHeader::get_path(PianoRollHeader::ItemType note_type, int note, double x[], double y[])
{
double y_pos = floor(_view.note_to_y(note)) - 0.5f;
double note_height;
double other_y1 = floor(_view.note_to_y(note+1)) + floor(_note_height / 2.0f) + 0.5f;
double other_y2 = floor(_view.note_to_y(note-1)) + floor(_note_height / 2.0f) - 1.0f;
double width = get_width();
if (note == 0) {
note_height = floor(_view.contents_height()) - y_pos;
} else {
note_height = floor(_view.note_to_y(note - 1)) - y_pos;
}
switch (note_type) {
case BLACK_SEPARATOR:
x[0] = 1.5f;
y[0] = y_pos;
x[1] = _black_note_width;
y[1] = y_pos;
break;
case BLACK_MIDDLE_SEPARATOR:
x[0] = _black_note_width;
y[0] = y_pos + floor(_note_height / 2.0f);
x[1] = width - 1.0f;
y[1] = y[0];
break;
case BLACK:
x[0] = 1.5f;
y[0] = y_pos + note_height - 0.5f;
x[1] = 1.5f;
y[1] = y_pos + 1.0f;
x[2] = _black_note_width;
y[2] = y_pos + 1.0f;
x[3] = _black_note_width;
y[3] = y_pos + note_height - 0.5f;
x[4] = 1.5f;
y[4] = y_pos + note_height - 0.5f;
return;
case WHITE_SEPARATOR:
x[0] = 1.5f;
y[0] = y_pos;
x[1] = width - 1.5f;
y[1] = y_pos;
break;
case WHITE_RECT:
x[0] = 1.5f;
y[0] = y_pos + note_height - 0.5f;
x[1] = 1.5f;
y[1] = y_pos + 1.0f;
x[2] = width - 1.5f;
y[2] = y_pos + 1.0f;
x[3] = width - 1.5f;
y[3] = y_pos + note_height - 0.5f;
x[4] = 1.5f;
y[4] = y_pos + note_height - 0.5f;
return;
case WHITE_CF:
x[0] = 1.5f;
y[0] = y_pos + note_height - 1.5f;
x[1] = 1.5f;
y[1] = y_pos + 1.0f;
x[2] = _black_note_width + 1.0f;
y[2] = y_pos + 1.0f;
x[3] = _black_note_width + 1.0f;
y[3] = other_y1;
x[4] = width - 1.5f;
y[4] = other_y1;
x[5] = width - 1.5f;
y[5] = y_pos + note_height - 1.5f;
x[6] = 1.5f;
y[6] = y_pos + note_height - 1.5f;
return;
case WHITE_EB:
x[0] = 1.5f;
y[0] = y_pos + note_height - 1.5f;
x[1] = 1.5f;
y[1] = y_pos + 1.0f;
x[2] = width - 1.5f;
y[2] = y_pos + 1.0f;
x[3] = width - 1.5f;
y[3] = other_y2;
x[4] = _black_note_width + 1.0f;
y[4] = other_y2;
x[5] = _black_note_width + 1.0f;
y[5] = y_pos + note_height - 1.5f;
x[6] = 1.5f;
y[6] = y_pos + note_height - 1.5f;
return;
case WHITE_DGA:
x[0] = 1.5f;
y[0] = y_pos + note_height - 1.5f;
x[1] = 1.5f;
y[1] = y_pos + 1.0f;
x[2] = _black_note_width + 1.0f;
y[2] = y_pos + 1.0f;
x[3] = _black_note_width + 1.0f;
y[3] = other_y1;
x[4] = width - 1.5f;
y[4] = other_y1;
x[5] = width - 1.5f;
y[5] = other_y2;
x[6] = _black_note_width + 1.0f;
y[6] = other_y2;
x[7] = _black_note_width + 1.0f;
y[7] = y_pos + note_height - 1.5f;
x[8] = 1.5f;
y[8] = y_pos + note_height - 1.5f;
return;
default:
return;
}
}
bool
PianoRollHeader::on_expose_event (GdkEventExpose* ev)
{
GdkRectangle& rect = ev->area;
double font_size;
int lowest, highest;
Cairo::RefPtr<Cairo::Context> cr = get_window()->create_cairo_context();
Cairo::RefPtr<Cairo::LinearGradient> pat = Cairo::LinearGradient::create(0, 0, _black_note_width, 0);
double x[9];
double y[9];
Color bg, tl_shadow, br_shadow;
int oct_rel;
int y1 = max(rect.y, 0);
int y2 = min(rect.y + rect.height, (int) floor(_view.contents_height() - 1.0f));
//Cairo::TextExtents te;
lowest = max(_view.lowest_note(), _view.y_to_note(y2));
highest = min(_view.highest_note(), _view.y_to_note(y1));
if (lowest > 127) {
lowest = 0;
}
cr->select_font_face ("Georgia", Cairo::FONT_SLANT_NORMAL, Cairo::FONT_WEIGHT_BOLD);
font_size = min((double) 10.0f, _note_height - 4.0f);
cr->set_font_size(font_size);
/* fill the entire rect with the color for non-highlighted white notes.
* then we won't have to draw the background for those notes,
* and would only have to draw the background for the one highlighted white note*/
//cr->rectangle(rect.x, rect.y, rect.width, rect.height);
//cr->set_source_rgb(white.r, white.g, white.b);
//cr->fill();
cr->set_line_width(1.0f);
/* draw vertical lines with shade at both ends of the widget */
cr->set_source_rgb(0.0f, 0.0f, 0.0f);
cr->move_to(0.5f, rect.y);
cr->line_to(0.5f, rect.y + rect.height);
cr->stroke();
cr->move_to(get_width() - 0.5f, rect.y);
cr->line_to(get_width() - 0.5f, rect.y + rect.height);
cr->stroke();
//pat->add_color_stop_rgb(0.0, 0.33, 0.33, 0.33);
//pat->add_color_stop_rgb(0.2, 0.39, 0.39, 0.39);
//pat->add_color_stop_rgb(1.0, 0.22, 0.22, 0.22);
//cr->set_source(pat);
for (int i = lowest; i <= highest; ++i) {
oct_rel = i % 12;
switch (oct_rel) {
case 1:
case 3:
case 6:
case 8:
case 10:
/* black note */
if (i == _highlighted_note) {
bg.set(black_highlight);
} else {
bg.set(black);
}
if (_active_notes[i]) {
tl_shadow.set(black_shade_dark);
br_shadow.set(black_shade_light);
} else {
tl_shadow.set(black_shade_light);
br_shadow.set(black_shade_dark);
}
/* draw black separators */
cr->set_source_rgb(0.0f, 0.0f, 0.0f);
get_path(BLACK_SEPARATOR, i, x, y);
create_path(cr, x, y, 0, 1);
cr->stroke();
get_path(BLACK_MIDDLE_SEPARATOR, i, x, y);
create_path(cr, x, y, 0, 1);
cr->stroke();
get_path(BLACK, i, x, y);
render_rect(cr, i, x, y, bg, tl_shadow, br_shadow);
break;
default:
/* white note */
if (i == _highlighted_note) {
bg.set(white_highlight);
} else {
bg.set(white);
}
if (_active_notes[i]) {
tl_shadow.set(white_shade_dark);
br_shadow.set(white_shade_light);
} else {
tl_shadow.set(white_shade_light);
br_shadow.set(white_shade_dark);
}
switch(oct_rel) {
case 0:
case 5:
if (i == _view.highest_note()) {
get_path(WHITE_RECT, i, x, y);
render_rect(cr, i, x, y, bg, tl_shadow, br_shadow);
} else {
get_path(WHITE_CF, i, x, y);
render_cf(cr, i, x, y, bg, tl_shadow, br_shadow);
}
break;
case 2:
case 7:
case 9:
if (i == _view.highest_note()) {
get_path(WHITE_EB, i, x, y);
render_eb(cr, i, x, y, bg, tl_shadow, br_shadow);
} else if (i == _view.lowest_note()) {
get_path(WHITE_CF, i, x, y);
render_cf(cr, i, x, y, bg, tl_shadow, br_shadow);
} else {
get_path(WHITE_DGA, i, x, y);
render_dga(cr, i, x, y, bg, tl_shadow, br_shadow);
}
break;
case 4:
case 11:
cr->set_source_rgb(0.0f, 0.0f, 0.0f);
get_path(WHITE_SEPARATOR, i, x, y);
create_path(cr, x, y, 0, 1);
cr->stroke();
if (i == _view.lowest_note()) {
get_path(WHITE_RECT, i, x, y);
render_rect(cr, i, x, y, bg, tl_shadow, br_shadow);
} else {
get_path(WHITE_EB, i, x, y);
render_eb(cr, i, x, y, bg, tl_shadow, br_shadow);
}
break;
default:
break;
}
break;
}
/* render the name of which C this is */
if (oct_rel == 0) {
std::stringstream s;
double y = floor(_view.note_to_y(i)) - 0.5f;
double note_height = floor(_view.note_to_y(i - 1)) - y;
int cn = i / 12;
s << "C" << cn;
//cr->get_text_extents(s.str(), te);
cr->set_source_rgb(0.30f, 0.30f, 0.30f);
cr->move_to(2.0f, y + note_height - 1.0f - (note_height - font_size) / 2.0f);
cr->show_text(s.str());
}
}
return true;
}
bool
PianoRollHeader::on_motion_notify_event (GdkEventMotion* ev)
{
int note = _view.y_to_note(ev->y);
if (_highlighted_note != no_note) {
if (note > _highlighted_note) {
invalidate_note_range(_highlighted_note, note);
} else {
invalidate_note_range(note, _highlighted_note);
}
_highlighted_note = note;
}
/* redraw already taken care of above */
if (_clicked_note != no_note && _clicked_note != note) {
_active_notes[_clicked_note] = false;
send_note_off(_clicked_note);
_clicked_note = note;
if (!_active_notes[note]) {
_active_notes[note] = true;
send_note_on(note);
}
}
//win->process_updates(false);
return true;
}
bool
PianoRollHeader::on_button_press_event (GdkEventButton* ev)
{
int note = _view.y_to_note(ev->y);
if (ev->type == GDK_BUTTON_PRESS && note >= 0 && note < 128) {
add_modal_grab();
_dragging = true;
if (!_active_notes[note]) {
_active_notes[note] = true;
_clicked_note = note;
send_note_on(note);
invalidate_note_range(note, note);
} else {
_clicked_note = no_note;
}
}
return true;
}
bool
PianoRollHeader::on_button_release_event (GdkEventButton* ev)
{
int note = _view.y_to_note(ev->y);
if (_dragging) {
remove_modal_grab();
_dragging = false;
if (note == _clicked_note) {
_active_notes[note] = false;
_clicked_note = no_note;
send_note_off(note);
invalidate_note_range(note, note);
}
}
return true;
}
bool
PianoRollHeader::on_enter_notify_event (GdkEventCrossing* ev)
{
_highlighted_note = _view.y_to_note(ev->y);
invalidate_note_range(_highlighted_note, _highlighted_note);
return true;
}
bool
PianoRollHeader::on_leave_notify_event (GdkEventCrossing*)
{
invalidate_note_range(_highlighted_note, _highlighted_note);
if (_clicked_note != no_note) {
_active_notes[_clicked_note] = false;
send_note_off(_clicked_note);
if (_clicked_note != _highlighted_note) {
invalidate_note_range(_clicked_note, _clicked_note);
}
_clicked_note = no_note;
}
_highlighted_note = no_note;
return true;
}
bool
PianoRollHeader::on_scroll_event (GdkEventScroll*)
{
return true;
}
void
PianoRollHeader::note_range_changed()
{
_note_height = floor(_view.note_height()) + 0.5f;
queue_draw();
Glib::RefPtr<Gdk::Window> win = get_window();
if (win) {
win->process_updates(false);
}
}
void
PianoRollHeader::invalidate_note_range(int lowest, int highest)
{
Glib::RefPtr<Gdk::Window> win = get_window();
Gdk::Rectangle rect;
// the non-rectangular geometry of some of the notes requires more
// redraws than the notes that actually changed.
switch(lowest % 12) {
case 0:
case 5:
lowest = max((int) _view.lowest_note(), lowest);
break;
default:
lowest = max((int) _view.lowest_note(), lowest - 1);
break;
}
switch(highest % 12) {
case 4:
case 11:
highest = min((int) _view.highest_note(), highest);
break;
case 1:
case 3:
case 6:
case 8:
case 10:
highest = min((int) _view.highest_note(), highest + 1);
break;
default:
highest = min((int) _view.highest_note(), highest + 2);
break;
}
double y = _view.note_to_y(highest);
double height = _view.note_to_y(lowest - 1) - y;
rect.set_x(0);
rect.set_width(get_width());
rect.set_y((int) floor(y));
rect.set_height((int) floor(height));
if (win) {
win->invalidate_rect(rect, false);
}
}
void
PianoRollHeader::on_size_request(Gtk::Requisition* r)
{
r->width = 20;
}
void
PianoRollHeader::on_size_allocate(Gtk::Allocation& a)
{
DrawingArea::on_size_allocate(a);
_black_note_width = floor(0.7 * get_width()) + 0.5f;
}
void
PianoRollHeader::send_note_on(uint8_t note)
{
boost::shared_ptr<ARDOUR::MidiTrack> track = _view.trackview().midi_track();
//cerr << "note on: " << (int) note << endl;
if (track) {
_event[0] = (MIDI_CMD_NOTE_ON | track->default_channel());
_event[1] = note;
_event[2] = 100;
track->write_immediate_event(3, _event);
}
}
void
PianoRollHeader::send_note_off(uint8_t note)
{
boost::shared_ptr<ARDOUR::MidiTrack> track = _view.trackview().midi_track();
if (track) {
_event[0] = (MIDI_CMD_NOTE_OFF | track->default_channel());
_event[1] = note;
_event[2] = 100;
track->write_immediate_event(3, _event);
}
}