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livetrax/gtk2_ardour/piano_roll_header.cc
Paul Davis ec7d502959 cairo single pixel line offset fix, part 2 
This will need careful visual inspection of the items drawn by the
affected code to make sure they are still precisely as intended
2023-07-17 20:55:13 -06:00

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/*
* Copyright (C) 2008-2014 David Robillard <d@drobilla.net>
* Copyright (C) 2009-2011 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2009-2013 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2014-2017 Robin Gareus <robin@gareus.org>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "ardour/midi_track.h"
#include "evoral/midi_events.h"
#include <iostream>
#include "gtkmm2ext/keyboard.h"
#include "editing.h"
#include "midi_streamview.h"
#include "midi_time_axis.h"
#include "piano_roll_header.h"
#include "public_editor.h"
#include "ui_config.h"
using namespace std;
using namespace Gtkmm2ext;
PianoRollHeader::Color PianoRollHeader::white = PianoRollHeader::Color (0.77f, 0.78f, 0.76f);
PianoRollHeader::Color PianoRollHeader::white_highlight = PianoRollHeader::Color (1.00f, 0.40f, 0.40f);
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 (0.60f, 0.10f, 0.10f);
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_MIDI_NOTE)
, _clicked_note (NO_MIDI_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 (sigc::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)) + 1.5f;
double note_height;
double other_y1 = floor (_view.note_to_y (note + 1)) + floor (_note_height / 2.0f) + 2.5f;
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 + 2.;
} else {
note_height = floor (_view.note_to_y (note - 1)) - y_pos + 2.;
}
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;
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::RefPtr<Cairo::Context> cr = get_window ()->create_cairo_context ();
Cairo::RefPtr<Cairo::LinearGradient> pat = Cairo::LinearGradient::create (0, 0, _black_note_width, 0);
//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 - 1;
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);
set_note_highlight (note);
if (_dragging) {
if (false /*editor().current_mouse_mode() == Editing::MouseRange*/) { //ToDo: fix this. this mode is buggy, and of questionable utility anyway
/* select note range */
if (Keyboard::no_modifiers_active (ev->state)) {
AddNoteSelection (note); // EMIT SIGNAL
}
} else {
/* play notes */
/* redraw already taken care of above in set_note_highlight */
if (_clicked_note != NO_MIDI_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);
bool tertiary = Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier);
if (ev->button == 2 && Keyboard::no_modifiers_active (ev->state)) {
SetNoteSelection (note); // EMIT SIGNAL
return true;
} else if (tertiary && (ev->button == 1 || ev->button == 2)) {
ExtendNoteSelection (note); // EMIT SIGNAL
return true;
} else if (ev->button == 1 && 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 {
reset_clicked_note (note);
}
}
return true;
}
bool
PianoRollHeader::on_button_release_event (GdkEventButton* ev)
{
int note = _view.y_to_note (ev->y);
if (false /*editor().current_mouse_mode() == Editing::MouseRange*/) { //Todo: this mode is buggy, and of questionable utility anyway
if (Keyboard::no_modifiers_active (ev->state)) {
AddNoteSelection (note); // EMIT SIGNAL
} else if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
ToggleNoteSelection (note); // EMIT SIGNAL
} else if (Keyboard::modifier_state_equals (ev->state, Keyboard::RangeSelectModifier)) {
ExtendNoteSelection (note); // EMIT SIGNAL
}
} else {
if (_dragging) {
remove_modal_grab ();
if (note == _clicked_note) {
reset_clicked_note (note);
}
}
}
_dragging = false;
return true;
}
void
PianoRollHeader::set_note_highlight (uint8_t note)
{
if (_highlighted_note == note) {
return;
}
if (_highlighted_note != NO_MIDI_NOTE) {
if (note > _highlighted_note) {
invalidate_note_range (_highlighted_note, note);
} else {
invalidate_note_range (note, _highlighted_note);
}
}
_highlighted_note = note;
if (_highlighted_note != NO_MIDI_NOTE) {
invalidate_note_range (_highlighted_note, _highlighted_note);
}
}
bool
PianoRollHeader::on_enter_notify_event (GdkEventCrossing* ev)
{
set_note_highlight (_view.y_to_note (ev->y));
return true;
}
bool
PianoRollHeader::on_leave_notify_event (GdkEventCrossing*)
{
if (has_grab () && _dragging) {
return true;
}
invalidate_note_range (_highlighted_note, _highlighted_note);
if (_clicked_note != NO_MIDI_NOTE) {
reset_clicked_note (_clicked_note, _clicked_note != _highlighted_note);
}
_highlighted_note = NO_MIDI_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 ();
}
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 = std::max (20.f, rintf (20.f * UIConfiguration::instance ().get_ui_scale ()));
}
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)
{
std::shared_ptr<ARDOUR::MidiTrack> track = _view.trackview ().midi_track ();
MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*> (&_view.trackview ());
//cerr << "note on: " << (int) note << endl;
if (track) {
_event[0] = (MIDI_CMD_NOTE_ON | mtv->get_preferred_midi_channel ());
_event[1] = note;
_event[2] = 100;
track->write_immediate_event (Evoral::MIDI_EVENT, 3, _event);
}
}
void
PianoRollHeader::send_note_off (uint8_t note)
{
std::shared_ptr<ARDOUR::MidiTrack> track = _view.trackview ().midi_track ();
MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*> (&_view.trackview ());
if (track) {
_event[0] = (MIDI_CMD_NOTE_OFF | mtv->get_preferred_midi_channel ());
_event[1] = note;
_event[2] = 100;
track->write_immediate_event (Evoral::MIDI_EVENT, 3, _event);
}
}
void
PianoRollHeader::reset_clicked_note (uint8_t note, bool invalidate)
{
_active_notes[note] = false;
_clicked_note = NO_MIDI_NOTE;
send_note_off (note);
if (invalidate) {
invalidate_note_range (note, note);
}
}
PublicEditor&
PianoRollHeader::editor () const
{
return _view.trackview ().editor ();
}
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