gtk2_ardour/midi_region_view.cc

   1 /*
   2     Copyright (C) 2001-2007 Paul Davis
   3     Author: Dave Robillard
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 #include <cmath>
  21 #include <cassert>
  22 #include <algorithm>
  23
  24 #include <gtkmm.h>
  25
  26 #include <gtkmm2ext/gtk_ui.h>
  27
  28 #include <sigc++/signal.h>
  29
  30 #include <ardour/playlist.h>
  31 #include <ardour/tempo.h>
  32 #include <ardour/midi_region.h>
  33 #include <ardour/midi_source.h>
  34 #include <ardour/midi_diskstream.h>
  35 #include <ardour/midi_model.h>
  36
  37 #include "streamview.h"
  38 #include "midi_region_view.h"
  39 #include "midi_streamview.h"
  40 #include "midi_time_axis.h"
  41 #include "simpleline.h"
  42 #include "canvas-hit.h"
  43 #include "canvas-note.h"
  44 #include "canvas-program-change.h"
  45 #include "public_editor.h"
  46 #include "ghostregion.h"
  47 #include "midi_time_axis.h"
  48 #include "automation_time_axis.h"
  49 #include "automation_region_view.h"
  50 #include "utils.h"
  51 #include "midi_util.h"
  52 #include "gui_thread.h"
  53 #include "keyboard.h"
  54
  55 #include "i18n.h"
  56
  57 using namespace sigc;
  58 using namespace ARDOUR;
  59 using namespace PBD;
  60 using namespace Editing;
  61 using namespace ArdourCanvas;
  62
  63 MidiRegionView::MidiRegionView (ArdourCanvas::Group *parent, RouteTimeAxisView &tv, boost::shared_ptr<MidiRegion> r, double spu, Gdk::Color& basic_color)
  64         : RegionView (parent, tv, r, spu, basic_color)
  65         , _force_channel(-1)
  66         , _last_channel_selection(0xFFFF)
  67         , _default_note_length(0.0)
  68         , _current_range_min(0)
  69         , _current_range_max(0)
  70         , _active_notes(0)
  71         , _note_group(new ArdourCanvas::Group(*parent))
  72         , _delta_command(NULL)
  73         , _mouse_state(None)
  74         , _pressed_button(0)
  75 {
  76         _note_group->raise_to_top();
  77 }
  78
  79 MidiRegionView::MidiRegionView (ArdourCanvas::Group *parent, RouteTimeAxisView &tv, boost::shared_ptr<MidiRegion> r, double spu, Gdk::Color& basic_color, TimeAxisViewItem::Visibility visibility)
  80         : RegionView (parent, tv, r, spu, basic_color, false, visibility)
  81         , _force_channel(-1)
  82         , _last_channel_selection(0xFFFF)
  83         , _default_note_length(0.0)
  84         , _active_notes(0)
  85         , _note_group(new ArdourCanvas::Group(*parent))
  86         , _delta_command(NULL)
  87         , _mouse_state(None)
  88         , _pressed_button(0)
  89
  90 {
  91         _note_group->raise_to_top();
  92 }
  93
  94
  95 MidiRegionView::MidiRegionView (const MidiRegionView& other)
  96         : RegionView (other)
  97         , _force_channel(-1)
  98         , _last_channel_selection(0xFFFF)
  99         , _default_note_length(0.0)
 100         , _active_notes(0)
 101         , _note_group(new ArdourCanvas::Group(*get_canvas_group()))
 102         , _delta_command(NULL)
 103         , _mouse_state(None)
 104         , _pressed_button(0)
 105 {
 106         Gdk::Color c;
 107         int r,g,b,a;
 108
 109         UINT_TO_RGBA (other.fill_color, &r, &g, &b, &a);
 110         c.set_rgb_p (r/255.0, g/255.0, b/255.0);
 111
 112         init (c, false);
 113 }
 114
 115 MidiRegionView::MidiRegionView (const MidiRegionView& other, boost::shared_ptr<MidiRegion> other_region)
 116         : RegionView (other, boost::shared_ptr<Region> (other_region))
 117         , _force_channel(-1)
 118         , _last_channel_selection(0xFFFF)
 119         , _default_note_length(0.0)
 120         , _active_notes(0)
 121         , _note_group(new ArdourCanvas::Group(*get_canvas_group()))
 122         , _delta_command(NULL)
 123         , _mouse_state(None)
 124         , _pressed_button(0)
 125 {
 126         Gdk::Color c;
 127         int r,g,b,a;
 128
 129         UINT_TO_RGBA (other.fill_color, &r, &g, &b, &a);
 130         c.set_rgb_p (r/255.0, g/255.0, b/255.0);
 131
 132         init (c, true);
 133 }
 134
 135 void
 136 MidiRegionView::init (Gdk::Color& basic_color, bool wfd)
 137 {
 138         if (wfd)
 139                 midi_region()->midi_source(0)->load_model();
 140
 141         const Meter& m = trackview.session().tempo_map().meter_at(_region->position());
 142         const Tempo& t = trackview.session().tempo_map().tempo_at(_region->position());
 143         _default_note_length = m.frames_per_bar(t, trackview.session().frame_rate())
 144                         / m.beats_per_bar();
 145
 146         _model = midi_region()->midi_source(0)->model();
 147         _enable_display = false;
 148
 149         RegionView::init (basic_color, false);
 150
 151         compute_colors (basic_color);
 152
 153         set_height (trackview.current_height());
 154
 155         region_muted ();
 156         region_sync_changed ();
 157         region_resized (BoundsChanged);
 158         region_locked ();
 159
 160         reset_width_dependent_items (_pixel_width);
 161         //reset_width_dependent_items ((double) _region->length() / samples_per_unit);
 162
 163         set_colors ();
 164
 165         _enable_display = true;
 166         if (_model) {
 167                 if (wfd) {
 168                         redisplay_model();
 169                 }
 170                 _model->ContentsChanged.connect(sigc::mem_fun(this, &MidiRegionView::redisplay_model));
 171         }
 172
 173         group->raise_to_top();
 174         group->signal_event().connect (mem_fun (this, &MidiRegionView::canvas_event), false);
 175
 176         midi_view()->signal_channel_mode_changed().connect(
 177                         mem_fun(this, &MidiRegionView::midi_channel_mode_changed));
 178 }
 179
 180 bool
 181 MidiRegionView::canvas_event(GdkEvent* ev)
 182 {
 183         static bool delete_mod = false;
 184         static Editing::MidiEditMode original_mode;
 185
 186         static double drag_start_x, drag_start_y;
 187         static double last_x, last_y;
 188         double event_x, event_y;
 189         nframes64_t event_frame = 0;
 190
 191         static ArdourCanvas::SimpleRect* drag_rect = NULL;
 192
 193         if (trackview.editor.current_mouse_mode() != MouseNote)
 194                 return false;
 195
 196         // Mmmm, spaghetti
 197
 198         switch (ev->type) {
 199         case GDK_KEY_PRESS:
 200                 if (ev->key.keyval == GDK_Delete && !delete_mod) {
 201                         delete_mod = true;
 202                         original_mode = trackview.editor.current_midi_edit_mode();
 203                         trackview.editor.set_midi_edit_mode(MidiEditErase);
 204                         start_delta_command(_("erase notes"));
 205                         _mouse_state = EraseTouchDragging;
 206                         return true;
 207                 } else if (ev->key.keyval == GDK_Shift_L || ev->key.keyval == GDK_Control_L) {
 208                         _mouse_state = SelectTouchDragging;
 209                         return true;
 210                 } else if (ev->key.keyval == GDK_Escape) {
 211                         clear_selection();
 212                         _mouse_state = None;
 213                 }
 214                 return false;
 215
 216         case GDK_KEY_RELEASE:
 217                 if (ev->key.keyval == GDK_Delete) {
 218                         if (_mouse_state == EraseTouchDragging) {
 219                                 delete_selection();
 220                                 apply_command();
 221                         }
 222                         if (delete_mod) {
 223                                 trackview.editor.set_midi_edit_mode(original_mode);
 224                                 _mouse_state = None;
 225                                 delete_mod = false;
 226                         }
 227                         return true;
 228                 } else if (ev->key.keyval == GDK_Shift_L || ev->key.keyval == GDK_Control_L) {
 229                         _mouse_state = None;
 230                         return true;
 231                 }
 232                 return false;
 233
 234         case GDK_BUTTON_PRESS:
 235                 if (_mouse_state != SelectTouchDragging &&
 236                         _mouse_state != EraseTouchDragging &&
 237                         ev->button.button == 1) {
 238                         _pressed_button = ev->button.button;
 239                         _mouse_state = Pressed;
 240                         return true;
 241                 }
 242                 _pressed_button = ev->button.button;
 243                 return true;
 244
 245         case GDK_2BUTTON_PRESS:
 246                 return true;
 247
 248         case GDK_ENTER_NOTIFY:
 249                 /* FIXME: do this on switch to note tool, too, if the pointer is already in */
 250                 Keyboard::magic_widget_grab_focus();
 251                 group->grab_focus();
 252                 break;
 253
 254         case GDK_MOTION_NOTIFY:
 255                 event_x = ev->motion.x;
 256                 event_y = ev->motion.y;
 257                 group->w2i(event_x, event_y);
 258
 259                 // convert event_x to global frame
 260                 event_frame = trackview.editor.pixel_to_frame(event_x) + _region->position();
 261                 trackview.editor.snap_to(event_frame);
 262                 // convert event_frame back to local coordinates relative to position
 263                 event_frame -= _region->position();
 264
 265                 switch (_mouse_state) {
 266                 case Pressed: // Drag start
 267
 268                         // Select drag start
 269                         if (_pressed_button == 1 && trackview.editor.current_midi_edit_mode() == MidiEditSelect) {
 270                                 group->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
 271                                                 Gdk::Cursor(Gdk::FLEUR), ev->motion.time);
 272                                 last_x = event_x;
 273                                 last_y = event_y;
 274                                 drag_start_x = event_x;
 275                                 drag_start_y = event_y;
 276
 277                                 drag_rect = new ArdourCanvas::SimpleRect(*group);
 278                                 drag_rect->property_x1() = event_x;
 279                                 drag_rect->property_y1() = event_y;
 280                                 drag_rect->property_x2() = event_x;
 281                                 drag_rect->property_y2() = event_y;
 282                                 drag_rect->property_outline_what() = 0xFF;
 283                                 drag_rect->property_outline_color_rgba()
 284                                         = ARDOUR_UI::config()->canvasvar_MidiSelectRectOutline.get();
 285                                 drag_rect->property_fill_color_rgba()
 286                                         = ARDOUR_UI::config()->canvasvar_MidiSelectRectFill.get();
 287
 288                                 _mouse_state = SelectRectDragging;
 289                                 return true;
 290
 291                         // Add note drag start
 292                         } else if (trackview.editor.current_midi_edit_mode() == MidiEditPencil) {
 293                                 group->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
 294                                                 Gdk::Cursor(Gdk::FLEUR), ev->motion.time);
 295                                 last_x = event_x;
 296                                 last_y = event_y;
 297                                 drag_start_x = event_x;
 298                                 drag_start_y = event_y;
 299
 300                                 drag_rect = new ArdourCanvas::SimpleRect(*group);
 301                                 drag_rect->property_x1() = trackview.editor.frame_to_pixel(event_frame);
 302
 303                                 drag_rect->property_y1() = midi_stream_view()->note_to_y(midi_stream_view()->y_to_note(event_y));
 304                                 drag_rect->property_x2() = event_x;
 305                                 drag_rect->property_y2() = drag_rect->property_y1() + floor(midi_stream_view()->note_height());
 306                                 drag_rect->property_outline_what() = 0xFF;
 307                                 drag_rect->property_outline_color_rgba() = 0xFFFFFF99;
 308
 309                                 drag_rect->property_fill_color_rgba() = 0xFFFFFF66;
 310
 311                                 _mouse_state = AddDragging;
 312                                 return true;
 313                         }
 314
 315                         return false;
 316
 317                 case SelectRectDragging: // Select drag motion
 318                 case AddDragging: // Add note drag motion
 319                         if (ev->motion.is_hint) {
 320                                 int t_x;
 321                                 int t_y;
 322                                 GdkModifierType state;
 323                                 gdk_window_get_pointer(ev->motion.window, &t_x, &t_y, &state);
 324                                 event_x = t_x;
 325                                 event_y = t_y;
 326                         }
 327
 328                         if (_mouse_state == AddDragging)
 329                                 event_x = trackview.editor.frame_to_pixel(event_frame);
 330
 331                         if (drag_rect) {
 332                                 if (event_x > drag_start_x)
 333                                         drag_rect->property_x2() = event_x;
 334                                 else
 335                                         drag_rect->property_x1() = event_x;
 336                         }
 337
 338                         if (drag_rect && _mouse_state == SelectRectDragging) {
 339                                 if (event_y > drag_start_y)
 340                                         drag_rect->property_y2() = event_y;
 341                                 else
 342                                         drag_rect->property_y1() = event_y;
 343
 344                                 update_drag_selection(drag_start_x, event_x, drag_start_y, event_y);
 345                         }
 346
 347                         last_x = event_x;
 348                         last_y = event_y;
 349
 350                 case EraseTouchDragging:
 351                 case SelectTouchDragging:
 352                         return false;
 353
 354                 default:
 355                         break;
 356                 }
 357                 break;
 358
 359         case GDK_BUTTON_RELEASE:
 360                 event_x = ev->motion.x;
 361                 event_y = ev->motion.y;
 362                 group->w2i(event_x, event_y);
 363                 group->ungrab(ev->button.time);
 364                 event_frame = trackview.editor.pixel_to_frame(event_x);
 365
 366                 if (_pressed_button != 1) {
 367                         return false;
 368                 }
 369
 370                 switch (_mouse_state) {
 371                 case Pressed: // Clicked
 372                         switch (trackview.editor.current_midi_edit_mode()) {
 373                         case MidiEditSelect:
 374                         case MidiEditResize:
 375                                 clear_selection();
 376                                 break;
 377                         case MidiEditPencil:
 378                                 create_note_at(event_x, event_y, _default_note_length);
 379                         default: break;
 380                         }
 381                         _mouse_state = None;
 382                         break;
 383                 case SelectRectDragging: // Select drag done
 384                         _mouse_state = None;
 385                         delete drag_rect;
 386                         drag_rect = NULL;
 387                         break;
 388                 case AddDragging: // Add drag done
 389                         _mouse_state = None;
 390                         if (drag_rect->property_x2() > drag_rect->property_x1() + 2) {
 391                                 const double x      = drag_rect->property_x1();
 392                                 const double length = trackview.editor.pixel_to_frame(
 393                                                         drag_rect->property_x2() - drag_rect->property_x1());
 394
 395                                 create_note_at(x, drag_rect->property_y1(), length);
 396                         }
 397
 398                         delete drag_rect;
 399                         drag_rect = NULL;
 400                 default: break;
 401                 }
 402
 403         default: break;
 404         }
 405
 406         return false;
 407 }
 408
 409
 410 /** Add a note to the model, and the view, at a canvas (click) coordinate */
 411 void
 412 MidiRegionView::create_note_at(double x, double y, double length)
 413 {
 414         MidiTimeAxisView* const mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
 415         MidiStreamView* const view = mtv->midi_view();
 416
 417         double note = midi_stream_view()->y_to_note(y);
 418
 419         assert(note >= 0.0);
 420         assert(note <= 127.0);
 421
 422         nframes64_t new_note_time = trackview.editor.pixel_to_frame (x);
 423         assert(new_note_time >= 0);
 424         new_note_time += _region->start();
 425
 426         /*
 427         const Meter& m = trackview.session().tempo_map().meter_at(new_note_time);
 428         const Tempo& t = trackview.session().tempo_map().tempo_at(new_note_time);
 429         double length = m.frames_per_bar(t, trackview.session().frame_rate()) / m.beats_per_bar();
 430         */
 431
 432         // we need to snap here again in nframes64_t in order to be sample accurate
 433         // since note time is region-absolute but snap_to_frame expects position-relative
 434         // time we have to coordinate transform back and forth here.
 435         nframes64_t new_note_time_position_relative = new_note_time      - _region->start();
 436         new_note_time = snap_to_frame(new_note_time_position_relative) + _region->start();
 437
 438         // we need to snap the length too to be sample accurate
 439         nframes64_t new_note_length = nframes_t(length);
 440         new_note_length = snap_to_frame(new_note_time_position_relative + new_note_length) + _region->start()
 441                             - new_note_time;
 442
 443         const boost::shared_ptr<Evoral::Note> new_note(new Evoral::Note(
 444                         0, new_note_time, new_note_length, (uint8_t)note, 0x40));
 445         view->update_note_range(new_note->note());
 446
 447         MidiModel::DeltaCommand* cmd = _model->new_delta_command("add note");
 448         cmd->add(new_note);
 449         _model->apply_command(trackview.session(), cmd);
 450 }
 451
 452
 453 void
 454 MidiRegionView::clear_events()
 455 {
 456         clear_selection();
 457
 458         MidiGhostRegion* gr;
 459         for (std::vector<GhostRegion*>::iterator g = ghosts.begin(); g != ghosts.end(); ++g) {
 460                 if ((gr = dynamic_cast<MidiGhostRegion*>(*g)) != 0) {
 461                         gr->clear_events();
 462                 }
 463         }
 464
 465         for (Events::iterator i = _events.begin(); i != _events.end(); ++i)
 466                 delete *i;
 467
 468         _events.clear();
 469         _pgm_changes.clear();
 470 }
 471
 472
 473 void
 474 MidiRegionView::display_model(boost::shared_ptr<MidiModel> model)
 475 {
 476         _model = model;
 477
 478         if (_enable_display)
 479                 redisplay_model();
 480 }
 481
 482
 483 void
 484 MidiRegionView::start_delta_command(string name)
 485 {
 486         if (!_delta_command)
 487                 _delta_command = _model->new_delta_command(name);
 488 }
 489
 490 void
 491 MidiRegionView::command_add_note(const boost::shared_ptr<Evoral::Note> note, bool selected)
 492 {
 493         if (_delta_command)
 494                 _delta_command->add(note);
 495
 496         if (selected)
 497                 _marked_for_selection.insert(note);
 498 }
 499
 500 void
 501 MidiRegionView::command_remove_note(ArdourCanvas::CanvasNoteEvent* ev)
 502 {
 503         if (_delta_command && ev->note()) {
 504                 _delta_command->remove(ev->note());
 505         }
 506 }
 507
 508 void
 509 MidiRegionView::apply_command()
 510 {
 511         if (!_delta_command) {
 512                 return;
 513         }
 514
 515         // Mark all selected notes for selection when model reloads
 516         for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
 517                 _marked_for_selection.insert((*i)->note());
 518         }
 519
 520         _model->apply_command(trackview.session(), _delta_command);
 521         _delta_command = NULL;
 522         midi_view()->midi_track()->diskstream()->playlist_modified();
 523
 524         _marked_for_selection.clear();
 525 }
 526
 527
 528 void
 529 MidiRegionView::abort_command()
 530 {
 531         delete _delta_command;
 532         _delta_command = NULL;
 533         clear_selection();
 534 }
 535
 536
 537 void
 538 MidiRegionView::redisplay_model()
 539 {
 540         // Don't redisplay the model if we're currently recording and displaying that
 541         if (_active_notes)
 542                 return;
 543
 544         if (_model) {
 545
 546                 clear_events();
 547                 _model->read_lock();
 548
 549                 /*MidiModel::Notes notes = _model->notes();
 550                 cerr << endl << _model->midi_source()->name() << " : redisplaying " << notes.size() << " notes:" << endl;
 551                 for (MidiModel::Notes::iterator i = notes.begin(); i != notes.end(); ++i) {
 552                         cerr << "NOTE  time: " << (*i)->time()
 553                                  << "  pitch: " << int((*i)->note())
 554                              << "  length: " << (*i)->length()
 555                              << "  end-time: " << (*i)->end_time()
 556                              << "  velocity: " << int((*i)->velocity())
 557                              << endl;
 558                 }*/
 559
 560                 for (size_t i = 0; i < _model->n_notes(); ++i)
 561                         add_note(_model->note_at(i));
 562
 563                 // Draw program change 'flags'
 564                 for (Automatable::Controls::iterator control = _model->controls().begin();
 565                                 control != _model->controls().end(); ++control) {
 566                         if (control->first.type() == MidiPgmChangeAutomation) {
 567                                 Glib::Mutex::Lock list_lock (control->second->list()->lock());
 568
 569                                 for (AutomationList::const_iterator event = control->second->list()->begin();
 570                                                 event != control->second->list()->end(); ++event) {
 571                                         Evoral::ControlIterator iter(control->second->list(), (*event)->when, (*event)->value);
 572                                         boost::shared_ptr<Evoral::Event> event(new Evoral::Event());
 573                                         _model->control_to_midi_event(event, iter);
 574                                         add_pgm_change(event);
 575                                 }
 576                                 break;
 577                         }
 578                 }
 579
 580                 // Is this necessary?
 581                 /*for (Automatable::Controls::const_iterator i = _model->controls().begin();
 582                                 i != _model->controls().end(); ++i) {
 583
 584                         assert(i->second);
 585
 586                         boost::shared_ptr<AutomationTimeAxisView> at
 587                                 = midi_view()->automation_child(i->second->parameter());
 588                         if (!at)
 589                                 continue;
 590
 591                         Gdk::Color col = midi_stream_view()->get_region_color();
 592
 593                         boost::shared_ptr<AutomationRegionView> arv;
 594
 595                         {
 596                                 Glib::Mutex::Lock list_lock (i->second->list()->lock());
 597
 598                                 arv = boost::shared_ptr<AutomationRegionView>(
 599                                                 new AutomationRegionView(at->canvas_display,
 600                                                         *at.get(), _region, i->second->list(),
 601                                                         midi_stream_view()->get_samples_per_unit(), col));
 602                         }
 603
 604                         arv->set_duration(_region->length(), this);
 605                         arv->init(col, true);
 606
 607                         _automation_children.insert(std::make_pair(i->second->parameter(), arv));
 608                 }*/
 609
 610                 _model->read_unlock();
 611
 612         } else {
 613                 cerr << "MidiRegionView::redisplay_model called without a model" << endmsg;
 614         }
 615 }
 616
 617
 618 MidiRegionView::~MidiRegionView ()
 619 {
 620         in_destructor = true;
 621
 622         RegionViewGoingAway (this); /* EMIT_SIGNAL */
 623
 624         if (_active_notes) {
 625                 end_write();
 626         }
 627
 628         _selection.clear();
 629         clear_events();
 630         delete _note_group;
 631         delete _delta_command;
 632 }
 633
 634
 635 void
 636 MidiRegionView::region_resized (Change what_changed)
 637 {
 638         RegionView::region_resized(what_changed);
 639
 640         if (what_changed & ARDOUR::PositionChanged) {
 641                 if (_enable_display)
 642                         redisplay_model();
 643         }
 644 }
 645
 646 void
 647 MidiRegionView::reset_width_dependent_items (double pixel_width)
 648 {
 649         RegionView::reset_width_dependent_items(pixel_width);
 650         assert(_pixel_width == pixel_width);
 651
 652         if (_enable_display)
 653                 redisplay_model();
 654 }
 655
 656 void
 657 MidiRegionView::set_height (gdouble height)
 658 {
 659         static const double FUDGE = 2;
 660         const double old_height = _height;
 661         RegionView::set_height(height);
 662         _height = height - FUDGE;
 663
 664         apply_note_range(midi_stream_view()->lowest_note(),
 665                          midi_stream_view()->highest_note(),
 666                          height != old_height + FUDGE);
 667
 668         if (name_text) {
 669                 name_text->raise_to_top();
 670         }
 671 }
 672
 673
 674 /** Apply the current note range from the stream view
 675  * by repositioning/hiding notes as necessary
 676  */
 677 void
 678 MidiRegionView::apply_note_range (uint8_t min, uint8_t max, bool force)
 679 {
 680         if (_enable_display) {
 681                 if (!force && _current_range_min == min && _current_range_max == max) {
 682                         return;
 683                 }
 684
 685                 _current_range_min = min;
 686                 _current_range_max = max;
 687
 688                 for (Events::const_iterator i = _events.begin(); i != _events.end(); ++i) {
 689                         CanvasNoteEvent* event = *i;
 690                         Item* item = dynamic_cast<Item*>(event);
 691                         assert(item);
 692                         if (event && event->note()) {
 693                                 if (event->note()->note() < _current_range_min || event->note()->note() > _current_range_max) {
 694                                         if (canvas_item_visible(item)) {
 695                                                 item->hide();
 696                                         }
 697                                 } else {
 698                                         if (!canvas_item_visible(item)) {
 699                                                 item->show();
 700                                         }
 701
 702                                         event->hide_velocity();
 703                                         if (CanvasNote* note = dynamic_cast<CanvasNote*>(event)) {
 704                                                 const double y1 = midi_stream_view()->note_to_y(event->note()->note());
 705                                                 const double y2 = y1 + floor(midi_stream_view()->note_height());
 706
 707                                                 note->property_y1() = y1;
 708                                                 note->property_y2() = y2;
 709                                         } else if (CanvasHit* hit = dynamic_cast<CanvasHit*>(event)) {
 710                                                 double x = trackview.editor.frame_to_pixel((nframes64_t)
 711                                                                 event->note()->time() - _region->start());
 712                                                 const double diamond_size = midi_stream_view()->note_height() / 2.0;
 713                                                 double y = midi_stream_view()->note_to_y(event->note()->note())
 714                                                                  + ((diamond_size-2.0) / 4.0);
 715
 716                                                 hit->set_height(diamond_size);
 717                                                 hit->move(x-hit->x1(), y-hit->y1());
 718                                                 hit->show();
 719                                         }
 720                                         if (event->selected()) {
 721                                                 event->show_velocity();
 722                                         }
 723                                 }
 724                         }
 725                 }
 726
 727         }
 728 }
 729
 730 GhostRegion*
 731 MidiRegionView::add_ghost (TimeAxisView& tv)
 732 {
 733         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*>(&trackview);
 734         CanvasNote* note;
 735         assert(rtv);
 736
 737         double unit_position = _region->position () / samples_per_unit;
 738         MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*>(&tv);
 739         MidiGhostRegion* ghost;
 740
 741         if (mtv && mtv->midi_view()) {
 742                 /* if ghost is inserted into midi track, use a dedicated midi ghost canvas group.
 743                    this is because it's nice to have midi notes on top of the note lines and
 744                    audio waveforms under it.
 745                  */
 746                 ghost = new MidiGhostRegion (*mtv->midi_view(), trackview, unit_position);
 747         }
 748         else {
 749                 ghost = new MidiGhostRegion (tv, trackview, unit_position);
 750         }
 751
 752         ghost->set_height ();
 753         ghost->set_duration (_region->length() / samples_per_unit);
 754         ghosts.push_back (ghost);
 755
 756         for (Events::iterator i = _events.begin(); i != _events.end(); ++i) {
 757                 if ((note = dynamic_cast<CanvasNote*>(*i)) != 0) {
 758                         ghost->add_note(note);
 759                 }
 760         }
 761
 762         ghost->GoingAway.connect (mem_fun(*this, &MidiRegionView::remove_ghost));
 763
 764         return ghost;
 765 }
 766
 767
 768 /** Begin tracking note state for successive calls to add_event
 769  */
 770 void
 771 MidiRegionView::begin_write()
 772 {
 773         assert(!_active_notes);
 774         _active_notes = new CanvasNote*[128];
 775         for (unsigned i=0; i < 128; ++i) {
 776                 _active_notes[i] = NULL;
 777         }
 778 }
 779
 780
 781 /** Destroy note state for add_event
 782  */
 783 void
 784 MidiRegionView::end_write()
 785 {
 786         delete[] _active_notes;
 787         _active_notes = NULL;
 788         _marked_for_selection.clear();
 789 }
 790
 791
 792 /** Resolve an active MIDI note (while recording).
 793  */
 794 void
 795 MidiRegionView::resolve_note(uint8_t note, double end_time)
 796 {
 797         if (midi_view()->note_mode() != Sustained)
 798                 return;
 799
 800         if (_active_notes && _active_notes[note]) {
 801                 _active_notes[note]->property_x2() = trackview.editor.frame_to_pixel((nframes64_t)end_time);
 802                 _active_notes[note]->property_outline_what() = (guint32) 0xF; // all edges
 803                 _active_notes[note] = NULL;
 804         }
 805 }
 806
 807
 808 /** Extend active notes to rightmost edge of region (if length is changed)
 809  */
 810 void
 811 MidiRegionView::extend_active_notes()
 812 {
 813         if (!_active_notes) {
 814                 return;
 815         }
 816
 817         for (unsigned i=0; i < 128; ++i) {
 818                 if (_active_notes[i]) {
 819                         _active_notes[i]->property_x2() = trackview.editor.frame_to_pixel(_region->length());
 820                 }
 821         }
 822 }
 823
 824
 825 /** Add a MIDI note to the view (with length).
 826  *
 827  * If in sustained mode, notes with length 0 will be considered active
 828  * notes, and resolve_note should be called when the corresponding note off
 829  * event arrives, to properly display the note.
 830  */
 831 void
 832 MidiRegionView::add_note(const boost::shared_ptr<Evoral::Note> note)
 833 {
 834         assert(note->time() >= 0);
 835         assert(midi_view()->note_mode() == Sustained || midi_view()->note_mode() == Percussive);
 836
 837         // dont display notes beyond the region bounds
 838         if ( note->time() - _region->start() >= _region->length() ||
 839                 note->time() <  _region->start() ||
 840                 note->note() < midi_stream_view()->lowest_note() ||
 841                 note->note() > midi_stream_view()->highest_note() ) {
 842                 return;
 843         }
 844
 845         ArdourCanvas::Group* const group = (ArdourCanvas::Group*)get_canvas_group();
 846
 847         CanvasNoteEvent* event = 0;
 848
 849         const double x = trackview.editor.frame_to_pixel((nframes64_t)note->time() - _region->start());
 850
 851         if (midi_view()->note_mode() == Sustained) {
 852
 853                 const double y1 = midi_stream_view()->note_to_y(note->note());
 854                 const double note_endpixel =
 855                         trackview.editor.frame_to_pixel((nframes64_t)note->end_time() - _region->start());
 856
 857                 CanvasNote* ev_rect = new CanvasNote(*this, *group, note);
 858                 ev_rect->property_x1() = x;
 859                 ev_rect->property_y1() = y1;
 860                 if (note->length() > 0)
 861                         ev_rect->property_x2() = note_endpixel;
 862                 else
 863                         ev_rect->property_x2() = trackview.editor.frame_to_pixel(_region->length());
 864                 ev_rect->property_y2() = y1 + floor(midi_stream_view()->note_height());
 865
 866                 if (note->length() == 0) {
 867
 868                         if (_active_notes) {
 869                                 assert(note->note() < 128);
 870                                 // If this note is already active there's a stuck note,
 871                                 // finish the old note rectangle
 872                                 if (_active_notes[note->note()]) {
 873                                         CanvasNote* const old_rect = _active_notes[note->note()];
 874                                         boost::shared_ptr<Evoral::Note> old_note = old_rect->note();
 875                                         cerr << "MidiModel: WARNING: Note has length 0: chan " << old_note->channel()
 876                                                 << "note " << (int)old_note->note() << " @ " << old_note->time() << endl;
 877                                         /* FIXME: How large to make it?  Make it a diamond? */
 878                                         old_rect->property_x2() = old_rect->property_x1() + 2.0;
 879                                         old_rect->property_outline_what() = (guint32) 0xF;
 880                                 }
 881                                 _active_notes[note->note()] = ev_rect;
 882                         }
 883                         /* outline all but right edge */
 884                         ev_rect->property_outline_what() = (guint32) (0x1 & 0x4 & 0x8);
 885                 } else {
 886                         /* outline all edges */
 887                         ev_rect->property_outline_what() = (guint32) 0xF;
 888                 }
 889
 890                 ev_rect->show();
 891                 _events.push_back(ev_rect);
 892                 event = ev_rect;
 893
 894                 MidiGhostRegion* gr;
 895
 896                 for (std::vector<GhostRegion*>::iterator g = ghosts.begin(); g != ghosts.end(); ++g) {
 897                         if ((gr = dynamic_cast<MidiGhostRegion*>(*g)) != 0) {
 898                                 gr->add_note(ev_rect);
 899                         }
 900                 }
 901
 902         } else if (midi_view()->note_mode() == Percussive) {
 903
 904                 //cerr << "MRV::add_note percussive " << note->note() << " @ " << note->time()
 905                 //      << " .. " << note->end_time() << endl;
 906
 907                 const double diamond_size = midi_stream_view()->note_height() / 2.0;
 908                 const double y = midi_stream_view()->note_to_y(note->note()) + ((diamond_size-2) / 4.0);
 909
 910                 CanvasHit* ev_diamond = new CanvasHit(*this, *group, diamond_size, note);
 911                 ev_diamond->move(x, y);
 912                 ev_diamond->show();
 913                 _events.push_back(ev_diamond);
 914                 event = ev_diamond;
 915         } else {
 916                 event = 0;
 917         }
 918
 919         if (event) {
 920                 if (_marked_for_selection.find(note) != _marked_for_selection.end()) {
 921                         note_selected(event, true);
 922                 }
 923                 event->on_channel_selection_change(_last_channel_selection);
 924         }
 925 }
 926
 927 void
 928 MidiRegionView::add_pgm_change(boost::shared_ptr<Evoral::Event> event)
 929 {
 930         assert(event->time() >= 0);
 931
 932         // dont display notes beyond the region bounds
 933         if (event->time() - _region->start() >= _region->length() || event->time() <  _region->start())
 934                 return;
 935
 936         ArdourCanvas::Group* const group = (ArdourCanvas::Group*)get_canvas_group();
 937         const double x = trackview.editor.frame_to_pixel((nframes64_t)event->time() - _region->start());
 938
 939         double height = midi_stream_view()->contents_height();
 940         _pgm_changes.push_back(
 941                 boost::shared_ptr<CanvasProgramChange>(
 942                         new CanvasProgramChange(*this, *group, event, height, x, 1.0)));
 943 }
 944
 945 void
 946 MidiRegionView::delete_selection()
 947 {
 948         assert(_delta_command);
 949
 950         for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
 951                 if ((*i)->selected()) {
 952                         _delta_command->remove((*i)->note());
 953                 }
 954         }
 955
 956         _selection.clear();
 957 }
 958
 959 void
 960 MidiRegionView::clear_selection_except(ArdourCanvas::CanvasNoteEvent* ev)
 961 {
 962         for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
 963                 if ((*i)->selected() && (*i) != ev) {
 964                         (*i)->selected(false);
 965                 }
 966         }
 967
 968         _selection.clear();
 969 }
 970
 971 void
 972 MidiRegionView::unique_select(ArdourCanvas::CanvasNoteEvent* ev)
 973 {
 974         for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
 975                 if ((*i) != ev) {
 976                         (*i)->selected(false);
 977                 }
 978         }
 979
 980         _selection.clear();
 981         _selection.insert(ev);
 982
 983         if ( ! ev->selected()) {
 984                 ev->selected(true);
 985         }
 986 }
 987
 988 void
 989 MidiRegionView::note_selected(ArdourCanvas::CanvasNoteEvent* ev, bool add)
 990 {
 991         if ( ! add) {
 992                 clear_selection_except(ev);
 993         }
 994
 995         _selection.insert(ev);
 996
 997         if ( ! ev->selected()) {
 998                 ev->selected(true);
 999         }
1000 }
1001
1002
1003 void
1004 MidiRegionView::note_deselected(ArdourCanvas::CanvasNoteEvent* ev, bool add)
1005 {
1006         if ( ! add) {
1007                 clear_selection_except(ev);
1008         }
1009
1010         _selection.erase(ev);
1011
1012         if (ev->selected()) {
1013                 ev->selected(false);
1014         }
1015 }
1016
1017
1018 void
1019 MidiRegionView::update_drag_selection(double x1, double x2, double y1, double y2)
1020 {
1021         const double last_y = std::min(y1, y2);
1022         const double y      = std::max(y1, y2);
1023
1024         // TODO: Make this faster by storing the last updated selection rect, and only
1025         // adjusting things that are in the area that appears/disappeared.
1026         // We probably need a tree to be able to find events in O(log(n)) time.
1027
1028 #ifndef NDEBUG
1029         double last_x1 = 0.0;
1030 #endif
1031
1032         if (x1 < x2) {
1033                 for (Events::iterator i = _events.begin(); i != _events.end(); ++i) {
1034 #ifndef NDEBUG
1035                         // Events should always be sorted by increasing x1() here
1036                         assert((*i)->x1() >= last_x1);
1037                         last_x1 = (*i)->x1();
1038 #endif
1039                         // Inside rectangle
1040                         if ((*i)->x1() >= x1 && (*i)->x1() <= x2 && (*i)->y1() >= last_y && (*i)->y1() <= y) {
1041                                 if (!(*i)->selected()) {
1042                                         (*i)->selected(true);
1043                                         _selection.insert(*i);
1044                                 }
1045                         // Not inside rectangle
1046                         } else if ((*i)->selected()) {
1047                                 (*i)->selected(false);
1048                                 _selection.erase(*i);
1049                         }
1050                 }
1051         } else {
1052                 for (Events::iterator i = _events.begin(); i != _events.end(); ++i) {
1053 #ifndef NDEBUG
1054                         // Events should always be sorted by increasing x1() here
1055                         assert((*i)->x1() >= last_x1);
1056                         last_x1 = (*i)->x1();
1057 #endif
1058                         // Inside rectangle
1059                         if ((*i)->x2() <= x1 && (*i)->x2() >= x2 && (*i)->y1() >= last_y && (*i)->y1() <= y) {
1060                                 if (!(*i)->selected()) {
1061                                         (*i)->selected(true);
1062                                         _selection.insert(*i);
1063                                 }
1064                         // Not inside rectangle
1065                         } else if ((*i)->selected()) {
1066                                 (*i)->selected(false);
1067                                 _selection.erase(*i);
1068                         }
1069                 }
1070         }
1071 }
1072
1073
1074 void
1075 MidiRegionView::move_selection(double dx, double dy)
1076 {
1077         for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i)
1078                 (*i)->move_event(dx, dy);
1079 }
1080
1081
1082 void
1083 MidiRegionView::note_dropped(CanvasNoteEvent* ev, double dt, uint8_t dnote)
1084 {
1085         // TODO: This would be faster/nicer with a MoveCommand that doesn't need to copy...
1086         if (_selection.find(ev) != _selection.end()) {
1087                 uint8_t lowest_note_in_selection  = midi_stream_view()->lowest_note();
1088                 uint8_t highest_note_in_selection = midi_stream_view()->highest_note();
1089                 uint8_t highest_note_difference = 0;
1090
1091                 // find highest and lowest notes first
1092                 for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
1093                         uint8_t pitch = (*i)->note()->note();
1094                         lowest_note_in_selection  = std::min(lowest_note_in_selection,  pitch);
1095                         highest_note_in_selection = std::max(highest_note_in_selection, pitch);
1096                 }
1097
1098                 /*
1099                 cerr << "dnote: " << (int) dnote << endl;
1100                 cerr << "lowest note (streamview): " << int(midi_stream_view()->lowest_note())
1101                      << " highest note (streamview): " << int(midi_stream_view()->highest_note()) << endl;
1102                 cerr << "lowest note (selection): " << int(lowest_note_in_selection) << " highest note(selection): "
1103                      << int(highest_note_in_selection) << endl;
1104                 cerr << "selection size: " << _selection.size() << endl;
1105                 cerr << "Highest note in selection: " << (int) highest_note_in_selection << endl;
1106                 */
1107
1108                 // Make sure the note pitch does not exceed the MIDI standard range
1109                 if (dnote <= 127 && (highest_note_in_selection + dnote > 127)) {
1110                         highest_note_difference = highest_note_in_selection - 127;
1111                 }
1112
1113                 start_delta_command(_("move notes"));
1114
1115                 for (Selection::iterator i = _selection.begin(); i != _selection.end() ; ) {
1116                         Selection::iterator next = i;
1117                         ++next;
1118
1119                         const boost::shared_ptr<Evoral::Note> copy(new Evoral::Note(*(*i)->note().get()));
1120
1121                         // we need to snap here again in nframes64_t in order to be sample accurate
1122                         double new_note_time = (*i)->note()->time();
1123                         new_note_time +=  dt;
1124
1125                         // keep notes inside region if dragged beyond left region bound
1126                         if (new_note_time < _region->start()) {
1127                                 new_note_time = _region->start();
1128                         }
1129
1130                         // since note time is region-absolute but snap_to_frame expects position-relative
1131                         // time we have to coordinate transform back and forth here.
1132                         new_note_time = snap_to_frame(nframes64_t(new_note_time) - _region->start()) + _region->start();
1133
1134                         copy->set_time(new_note_time);
1135
1136                         uint8_t original_pitch = (*i)->note()->note();
1137                         uint8_t new_pitch =  original_pitch + dnote - highest_note_difference;
1138
1139                         // keep notes in standard midi range
1140                         clamp_0_to_127(new_pitch);
1141
1142                         //notes which are dragged beyond the standard midi range snap back to their original place
1143                         if ((original_pitch != 0 && new_pitch == 0) || (original_pitch != 127 && new_pitch == 127)) {
1144                                 new_pitch = original_pitch;
1145                         }
1146
1147                         lowest_note_in_selection  = std::min(lowest_note_in_selection,  new_pitch);
1148                         highest_note_in_selection = std::max(highest_note_in_selection, new_pitch);
1149
1150                         copy->set_note(new_pitch);
1151
1152                         command_remove_note(*i);
1153                         command_add_note(copy, true);
1154
1155                         i = next;
1156                 }
1157
1158                 apply_command();
1159
1160                 // care about notes being moved beyond the upper/lower bounds on the canvas
1161                 if (lowest_note_in_selection  < midi_stream_view()->lowest_note() ||
1162                                 highest_note_in_selection > midi_stream_view()->highest_note()) {
1163                         midi_stream_view()->set_note_range(MidiStreamView::ContentsRange);
1164                 }
1165         }
1166 }
1167
1168 nframes64_t
1169 MidiRegionView::snap_to_frame(double x)
1170 {
1171         PublicEditor &editor = trackview.editor;
1172         // x is region relative
1173         // convert x to global frame
1174         nframes64_t frame = editor.pixel_to_frame(x) + _region->position();
1175         editor.snap_to(frame);
1176         // convert event_frame back to local coordinates relative to position
1177         frame -= _region->position();
1178         return frame;
1179 }
1180
1181 nframes64_t
1182 MidiRegionView::snap_to_frame(nframes64_t x)
1183 {
1184         PublicEditor &editor = trackview.editor;
1185         // x is region relative
1186         // convert x to global frame
1187         nframes64_t frame = x + _region->position();
1188         editor.snap_to(frame);
1189         // convert event_frame back to local coordinates relative to position
1190         frame -= _region->position();
1191         return frame;
1192 }
1193
1194 double
1195 MidiRegionView::snap_to_pixel(double x)
1196 {
1197         return (double) trackview.editor.frame_to_pixel(snap_to_frame(x));
1198 }
1199
1200 double
1201 MidiRegionView::get_position_pixels(void)
1202 {
1203         nframes64_t  region_frame  = get_position();
1204         return trackview.editor.frame_to_pixel(region_frame);
1205 }
1206
1207 void
1208 MidiRegionView::begin_resizing(CanvasNote::NoteEnd note_end)
1209 {
1210         _resize_data.clear();
1211
1212         for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
1213                 CanvasNote *note = dynamic_cast<CanvasNote *> (*i);
1214
1215                 // only insert CanvasNotes into the map
1216                 if (note) {
1217                         NoteResizeData *resize_data = new NoteResizeData();
1218                         resize_data->canvas_note = note;
1219
1220                         // create a new SimpleRect from the note which will be the resize preview
1221                         SimpleRect *resize_rect =
1222                                 new SimpleRect(
1223                                                 *group,
1224                                                 note->x1(),
1225                                                 note->y1(),
1226                                                 note->x2(),
1227                                                 note->y2());
1228
1229                         // calculate the colors: get the color settings
1230                         uint32_t fill_color =
1231                                 UINT_RGBA_CHANGE_A(
1232                                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelectedOutline.get(),
1233                                                 128);
1234
1235                         // make the resize preview notes more transparent and bright
1236                         fill_color = UINT_INTERPOLATE(fill_color, 0xFFFFFF40, 0.5);
1237
1238                         // calculate color based on note velocity
1239                         resize_rect->property_fill_color_rgba() =
1240                                 UINT_INTERPOLATE(
1241                                         note_fill_color(note->note()->velocity()),
1242                                         fill_color,
1243                                         0.85);
1244
1245                         resize_rect->property_outline_color_rgba() =
1246                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelectedOutline.get();
1247
1248                         resize_data->resize_rect = resize_rect;
1249
1250                         if (note_end == CanvasNote::NOTE_ON) {
1251                                 resize_data->current_x = note->x1();
1252                         } else { // NOTE_OFF
1253                                 resize_data->current_x = note->x2();
1254                         }
1255
1256                         _resize_data.push_back(resize_data);
1257                 }
1258         }
1259 }
1260
1261 void
1262 MidiRegionView::update_resizing(CanvasNote::NoteEnd note_end, double x, bool relative)
1263 {
1264         for (std::vector<NoteResizeData *>::iterator i = _resize_data.begin(); i != _resize_data.end(); ++i) {
1265                 SimpleRect     *resize_rect = (*i)->resize_rect;
1266                 CanvasNote     *canvas_note = (*i)->canvas_note;
1267
1268                 const double region_start = get_position_pixels();
1269
1270                 if (relative) {
1271                         (*i)->current_x = (*i)->current_x + x;
1272                 } else {
1273                         // x is in track relative, transform it to region relative
1274                         (*i)->current_x = x - region_start;
1275                 }
1276
1277                 double current_x = (*i)->current_x;
1278
1279                 if (note_end == CanvasNote::NOTE_ON) {
1280                         resize_rect->property_x1() = snap_to_pixel(current_x);
1281                         resize_rect->property_x2() = canvas_note->x2();
1282                 } else {
1283                         resize_rect->property_x2() = snap_to_pixel(current_x);
1284                         resize_rect->property_x1() = canvas_note->x1();
1285                 }
1286         }
1287 }
1288
1289 void
1290 MidiRegionView::commit_resizing(CanvasNote::NoteEnd note_end, double event_x, bool relative)
1291 {
1292         start_delta_command(_("resize notes"));
1293
1294         for (std::vector<NoteResizeData *>::iterator i = _resize_data.begin(); i != _resize_data.end(); ++i) {
1295                 CanvasNote*  canvas_note = (*i)->canvas_note;
1296                 SimpleRect*  resize_rect = (*i)->resize_rect;
1297                 double       current_x   = (*i)->current_x;
1298                 const double position    = get_position_pixels();
1299
1300                 if (!relative) {
1301                         // event_x is in track relative, transform it to region relative
1302                         current_x = event_x - position;
1303                 }
1304
1305                 // because snapping works on world coordinates we have to transform current_x
1306                 // to world coordinates before snapping and transform it back afterwards
1307                 nframes64_t current_frame = snap_to_frame(current_x);
1308                 // transform to region start relative
1309                 current_frame += _region->start();
1310
1311                 const boost::shared_ptr<Evoral::Note> copy(new Evoral::Note(*(canvas_note->note().get())));
1312
1313                 // resize beginning of note
1314                 if (note_end == CanvasNote::NOTE_ON && current_frame < copy->end_time()) {
1315                         command_remove_note(canvas_note);
1316                         copy->on_event().time() = current_frame;
1317                         command_add_note(copy, _selection.find(canvas_note) != _selection.end());
1318                 }
1319                 // resize end of note
1320                 if (note_end == CanvasNote::NOTE_OFF && current_frame > copy->time()) {
1321                         command_remove_note(canvas_note);
1322                         copy->off_event().time() = current_frame;
1323                         command_add_note(copy, _selection.find(canvas_note) != _selection.end());
1324                 }
1325
1326                 delete resize_rect;
1327                 delete (*i);
1328         }
1329
1330         _resize_data.clear();
1331         apply_command();
1332 }
1333
1334
1335 void
1336 MidiRegionView::change_velocity(uint8_t velocity, bool relative)
1337 {
1338         start_delta_command(_("change velocity"));
1339         for (Selection::iterator i = _selection.begin(); i != _selection.end();) {
1340                 Selection::iterator next = i;
1341                 ++next;
1342
1343                 CanvasNoteEvent *event = *i;
1344                 const boost::shared_ptr<Evoral::Note> copy(new Evoral::Note(*(event->note().get())));
1345
1346                 if (relative) {
1347                         uint8_t new_velocity = copy->velocity() + velocity;
1348                         clamp_0_to_127(new_velocity);
1349
1350                         copy->set_velocity(new_velocity);
1351                 } else { // absolute
1352                         copy->set_velocity(velocity);
1353                 }
1354
1355                 command_remove_note(event);
1356                 command_add_note(copy, true);
1357
1358                 i = next;
1359         }
1360
1361         apply_command();
1362 }
1363
1364 void
1365 MidiRegionView::change_channel(uint8_t channel)
1366 {
1367         start_delta_command(_("change channel"));
1368         for (Selection::iterator i = _selection.begin(); i != _selection.end();) {
1369                 Selection::iterator next = i;
1370                 ++next;
1371
1372                 CanvasNoteEvent *event = *i;
1373                 const boost::shared_ptr<Evoral::Note> copy(new Evoral::Note(*(event->note().get())));
1374
1375                 copy->set_channel(channel);
1376
1377                 command_remove_note(event);
1378                 command_add_note(copy, true);
1379
1380                 i = next;
1381         }
1382
1383         apply_command();
1384 }
1385
1386
1387 void
1388 MidiRegionView::note_entered(ArdourCanvas::CanvasNoteEvent* ev)
1389 {
1390         if (ev->note() && _mouse_state == EraseTouchDragging) {
1391                 start_delta_command(_("note entered"));
1392                 ev->selected(true);
1393                 _delta_command->remove(ev->note());
1394         } else if (_mouse_state == SelectTouchDragging) {
1395                 note_selected(ev, true);
1396         }
1397 }
1398
1399
1400 void
1401 MidiRegionView::switch_source(boost::shared_ptr<Source> src)
1402 {
1403         boost::shared_ptr<MidiSource> msrc = boost::dynamic_pointer_cast<MidiSource>(src);
1404         if (msrc)
1405                 display_model(msrc->model());
1406 }
1407
1408 void
1409 MidiRegionView::set_frame_color()
1410 {
1411         if (frame) {
1412                 if (_selected && should_show_selection) {
1413                         frame->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SelectedFrameBase.get();
1414                 } else {
1415                         frame->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiFrameBase.get();
1416                 }
1417         }
1418 }
1419
1420 void
1421 MidiRegionView::midi_channel_mode_changed(ChannelMode mode, uint16_t mask)
1422 {
1423         switch (mode) {
1424         case AllChannels:
1425         case FilterChannels:
1426                 _force_channel = -1;
1427                 break;
1428         case ForceChannel:
1429                 _force_channel = mask;
1430                 mask = 0xFFFF; // Show all notes as active (below)
1431         };
1432
1433         // Update notes for selection
1434         for (Events::iterator i = _events.begin(); i != _events.end(); ++i) {
1435                 (*i)->on_channel_selection_change(mask);
1436         }
1437
1438         _last_channel_selection = mask;
1439 }
1440