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_events.h>
  36 #include <ardour/midi_model.h>
  37
  38 #include "streamview.h"
  39 #include "midi_region_view.h"
  40 #include "midi_streamview.h"
  41 #include "midi_time_axis.h"
  42 #include "simplerect.h"
  43 #include "simpleline.h"
  44 #include "canvas-hit.h"
  45 #include "public_editor.h"
  46 #include "ghostregion.h"
  47 #include "midi_time_axis.h"
  48 #include "utils.h"
  49 #include "midi_util.h"
  50 #include "gui_thread.h"
  51 #include "keyboard.h"
  52
  53 #include "i18n.h"
  54
  55 using namespace sigc;
  56 using namespace ARDOUR;
  57 using namespace PBD;
  58 using namespace Editing;
  59 using namespace ArdourCanvas;
  60
  61 MidiRegionView::MidiRegionView (ArdourCanvas::Group *parent, RouteTimeAxisView &tv, boost::shared_ptr<MidiRegion> r, double spu,
  62                                   Gdk::Color& basic_color)
  63         : RegionView (parent, tv, r, spu, basic_color)
  64         , _default_note_length(0.0)
  65         , _active_notes(0)
  66         , _delta_command(NULL)
  67         , _command_mode(None)
  68 {
  69 }
  70
  71 MidiRegionView::MidiRegionView (ArdourCanvas::Group *parent, RouteTimeAxisView &tv, boost::shared_ptr<MidiRegion> r, double spu,
  72                                   Gdk::Color& basic_color, TimeAxisViewItem::Visibility visibility)
  73         : RegionView (parent, tv, r, spu, basic_color, visibility)
  74         , _default_note_length(0.0)
  75         , _active_notes(0)
  76         , _delta_command(NULL)
  77         , _command_mode(None)
  78 {
  79 }
  80
  81 void
  82 MidiRegionView::init (Gdk::Color& basic_color, bool wfd)
  83 {
  84         if (wfd)
  85                 midi_region()->midi_source(0)->load_model();
  86
  87         const Meter& m = trackview.session().tempo_map().meter_at(_region->start());
  88         const Tempo& t = trackview.session().tempo_map().tempo_at(_region->start());
  89         _default_note_length = m.frames_per_bar(t, trackview.session().frame_rate())
  90                         / m.beats_per_bar();
  91
  92         _model = midi_region()->midi_source(0)->model();
  93         _enable_display = false;
  94
  95         RegionView::init(basic_color, false);
  96
  97         compute_colors (basic_color);
  98
  99         reset_width_dependent_items ((double) _region->length() / samples_per_unit);
 100
 101         set_y_position_and_height (0, trackview.height);
 102
 103         region_muted ();
 104         region_resized (BoundsChanged);
 105         region_locked ();
 106
 107         _region->StateChanged.connect (mem_fun(*this, &MidiRegionView::region_changed));
 108
 109         set_colors ();
 110
 111         _enable_display = true;
 112
 113         if (_model) {
 114                 if (wfd) {
 115                         redisplay_model();
 116                 }
 117                 _model->ContentsChanged.connect(sigc::mem_fun(this, &MidiRegionView::redisplay_model));
 118         }
 119
 120         group->signal_event().connect (mem_fun (this, &MidiRegionView::canvas_event), false);
 121
 122 }
 123
 124 bool
 125 MidiRegionView::canvas_event(GdkEvent* ev)
 126 {
 127         enum State { None, Pressed, SelectDragging, AddDragging };
 128         static int press_button = 0;
 129         static State _state;
 130
 131         static double drag_start_x, drag_start_y;
 132         static double last_x, last_y;
 133         double event_x, event_y;
 134
 135         static ArdourCanvas::SimpleRect* drag_rect = NULL;
 136
 137         if (trackview.editor.current_mouse_mode() != MouseNote)
 138                 return false;
 139
 140         switch (ev->type) {
 141         case GDK_KEY_PRESS:
 142                 if (ev->key.keyval == GDK_Delete) {
 143                         trackview.editor.set_midi_edit_mode(MidiEditErase);
 144                         start_remove_command();
 145                 }
 146                 break;
 147
 148         case GDK_KEY_RELEASE:
 149                 if (_command_mode == Remove && ev->key.keyval == GDK_Delete) {
 150                         delete_selection();
 151                         apply_command();
 152                         trackview.editor.set_midi_edit_mode(MidiEditSelect);
 153                 }
 154                 break;
 155
 156         case GDK_BUTTON_PRESS:
 157                 //group->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK, ev->button.time);
 158                 _state = Pressed;
 159                 press_button = ev->button.button;
 160                 //cerr << "PRESSED: " << press_button << endl;
 161                 return true;
 162
 163         case GDK_ENTER_NOTIFY:
 164                 /* FIXME: do this on switch to note tool, too, if the pointer is already in */
 165                 Keyboard::magic_widget_grab_focus();
 166                 group->grab_focus();
 167                 break;
 168
 169         case GDK_MOTION_NOTIFY:
 170                 event_x = ev->motion.x;
 171                 event_y = ev->motion.y;
 172                 group->w2i(event_x, event_y);
 173
 174                 switch (_state) {
 175                 case Pressed: // Drag start
 176
 177                         if (press_button == 1 && _command_mode != Remove) { // Select rect start
 178                                 group->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
 179                                                 Gdk::Cursor(Gdk::FLEUR), ev->motion.time);
 180                                 last_x = event_x;
 181                                 last_y = event_y;
 182                                 drag_start_x = event_x;
 183                                 drag_start_y = event_y;
 184
 185                                 drag_rect = new ArdourCanvas::SimpleRect(*group);
 186                                 drag_rect->property_x1() = event_x;
 187                                 drag_rect->property_y1() = event_y;
 188                                 drag_rect->property_x2() = event_x;
 189                                 drag_rect->property_y2() = event_y;
 190                                 drag_rect->property_outline_what() = 0xFF;
 191                                 drag_rect->property_outline_color_rgba()
 192                                         = ARDOUR_UI::config()->canvasvar_MidiSelectRectOutline.get();
 193                                 drag_rect->property_fill_color_rgba()
 194                                         = ARDOUR_UI::config()->canvasvar_MidiSelectRectFill.get();
 195
 196                                 _state = SelectDragging;
 197                                 return true;
 198
 199                         } else if (press_button == 3) { // Add note drag start
 200                                 group->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
 201                                                 Gdk::Cursor(Gdk::FLEUR), ev->motion.time);
 202                                 last_x = event_x;
 203                                 last_y = event_y;
 204                                 drag_start_x = event_x;
 205                                 drag_start_y = event_y;
 206
 207                                 nframes_t event_frame = midi_view()->editor.pixel_to_frame(event_x);
 208                                 midi_view()->editor.snap_to(event_frame);
 209
 210                                 drag_rect = new ArdourCanvas::SimpleRect(*group);
 211                                 drag_rect->property_x1() = midi_view()->editor.frame_to_pixel(event_frame);
 212
 213                                 drag_rect->property_y1() = midi_stream_view()->note_to_y(midi_stream_view()->y_to_note(event_y));
 214                                 drag_rect->property_x2() = event_x;
 215                                 drag_rect->property_y2() = drag_rect->property_y1() + floor(midi_stream_view()->note_height());
 216                                 drag_rect->property_outline_what() = 0xFF;
 217                                 drag_rect->property_outline_color_rgba() = 0xFFFFFF99;
 218
 219                                 drag_rect->property_fill_color_rgba() = 0xFFFFFF66;
 220
 221                                 _state = AddDragging;
 222                                 return true;
 223                         }
 224
 225                         break;
 226
 227                 case SelectDragging: // Select rect motion
 228                 case AddDragging: // Add note rect motion
 229                         if (ev->motion.is_hint) {
 230                                 int t_x;
 231                                 int t_y;
 232                                 GdkModifierType state;
 233                                 gdk_window_get_pointer(ev->motion.window, &t_x, &t_y, &state);
 234                                 event_x = t_x;
 235                                 event_y = t_y;
 236                         }
 237
 238                         if (_state == AddDragging) {
 239                                 nframes_t event_frame = midi_view()->editor.pixel_to_frame(event_x);
 240                                 midi_view()->editor.snap_to(event_frame);
 241                                 event_x = midi_view()->editor.frame_to_pixel(event_frame);
 242                         }
 243
 244                         if (drag_rect)
 245                                 drag_rect->property_x2() = event_x;
 246
 247                         if (drag_rect && _state == SelectDragging) {
 248                                 drag_rect->property_y2() = event_y;
 249
 250                                 update_drag_selection(drag_start_x, event_x, drag_start_y, event_y);
 251                         }
 252
 253                         last_x = event_x;
 254                         last_y = event_y;
 255
 256                         return true;
 257                 default:
 258                         _state = None;
 259                         break;
 260                 }
 261                 break;
 262
 263         case GDK_BUTTON_RELEASE:
 264                 event_x = ev->motion.x;
 265                 event_y = ev->motion.y;
 266                 group->w2i(event_x, event_y);
 267                 group->ungrab(ev->button.time);
 268                 switch (_state) {
 269                 case Pressed: // Clicked
 270                         if (ev->button.button == 1) {
 271                                 clear_selection();
 272                         } else if (ev->button.button == 3) {
 273                                 nframes_t event_frame = midi_view()->editor.pixel_to_frame(event_x);
 274                                 midi_view()->editor.snap_to(event_frame);
 275                                 event_x = midi_view()->editor.frame_to_pixel(event_frame);
 276                                 create_note_at(event_x, event_y, _default_note_length);
 277                         }
 278                         _state = None;
 279                         return true;
 280                 case SelectDragging: // Select drag done
 281                         _state = None;
 282                         delete drag_rect;
 283                         drag_rect = NULL;
 284                         return true;
 285                 case AddDragging: // Add drag done
 286                         _state = None;
 287                         if (drag_rect->property_x2() > drag_rect->property_x1() + 2) {
 288                                 create_note_at(drag_rect->property_x1(), drag_rect->property_y1(),
 289                                                 trackview.editor.pixel_to_frame(
 290                                                 drag_rect->property_x2() - drag_rect->property_x1()));
 291                         }
 292
 293                         delete drag_rect;
 294                         drag_rect = NULL;
 295                         return true;
 296                 default:
 297                         break;
 298                 }
 299
 300         default:
 301                 break;
 302         }
 303
 304         return false;
 305 }
 306
 307
 308 /** Add a note to the model, and the view, at a canvas (click) coordinate */
 309 void
 310 MidiRegionView::create_note_at(double x, double y, double dur)
 311 {
 312         MidiTimeAxisView* const mtv = dynamic_cast<MidiTimeAxisView*>(&trackview);
 313         MidiStreamView* const view = mtv->midi_view();
 314
 315         double note = midi_stream_view()->y_to_note(y);
 316
 317         assert(note >= 0.0);
 318         assert(note <= 127.0);
 319
 320         const nframes_t stamp = trackview.editor.pixel_to_frame (x);
 321         assert(stamp >= 0);
 322         //assert(stamp <= _region->length());
 323
 324         //const Meter& m = trackview.session().tempo_map().meter_at(stamp);
 325         //const Tempo& t = trackview.session().tempo_map().tempo_at(stamp);
 326         //double dur = m.frames_per_bar(t, trackview.session().frame_rate()) / m.beats_per_bar();
 327
 328         // Add a 1 beat long note (for now)
 329         const MidiModel::Note new_note(stamp, dur, (uint8_t)note, 0x40);
 330
 331         view->update_bounds(new_note.note());
 332
 333         MidiModel::DeltaCommand* cmd = _model->new_delta_command("add note");
 334         cmd->add(new_note);
 335         _model->apply_command(cmd);
 336
 337         //add_note(new_note);
 338 }
 339
 340
 341 void
 342 MidiRegionView::clear_events()
 343 {
 344         for (std::vector<CanvasMidiEvent*>::iterator i = _events.begin(); i != _events.end(); ++i)
 345                 delete *i;
 346
 347         _events.clear();
 348 }
 349
 350
 351 void
 352 MidiRegionView::display_model(boost::shared_ptr<MidiModel> model)
 353 {
 354         _model = model;
 355
 356         if (_enable_display)
 357                 redisplay_model();
 358 }
 359
 360
 361 void
 362 MidiRegionView::redisplay_model()
 363 {
 364         clear_events();
 365
 366         if (_model) {
 367                 begin_write();
 368
 369                 for (size_t i=0; i < _model->n_notes(); ++i)
 370                         add_note(_model->note_at(i));
 371
 372                 end_write();
 373         } else {
 374                 warning << "MidiRegionView::redisplay_model called without a model" << endmsg;
 375         }
 376 }
 377
 378
 379 MidiRegionView::~MidiRegionView ()
 380 {
 381         in_destructor = true;
 382         end_write();
 383
 384         RegionViewGoingAway (this); /* EMIT_SIGNAL */
 385 }
 386
 387
 388 void
 389 MidiRegionView::region_resized (Change what_changed)
 390 {
 391         RegionView::region_resized(what_changed);
 392
 393         if (what_changed & ARDOUR::PositionChanged) {
 394
 395                 if (_enable_display)
 396                         redisplay_model();
 397
 398         } else if (what_changed & Change (StartChanged)) {
 399
 400                 //cerr << "MIDI RV START CHANGED" << endl;
 401
 402         } else if (what_changed & Change (LengthChanged)) {
 403
 404                 //cerr << "MIDI RV LENGTH CHANGED" << endl;
 405
 406         }
 407 }
 408
 409 void
 410 MidiRegionView::reset_width_dependent_items (double pixel_width)
 411 {
 412         RegionView::reset_width_dependent_items(pixel_width);
 413         assert(_pixel_width == pixel_width);
 414
 415         if (_enable_display)
 416                 redisplay_model();
 417 }
 418
 419 void
 420 MidiRegionView::set_y_position_and_height (double y, double h)
 421 {
 422         RegionView::set_y_position_and_height(y, h - 1);
 423
 424         if (_enable_display)
 425                 redisplay_model();
 426
 427         if (name_text) {
 428                 name_text->raise_to_top();
 429         }
 430 }
 431
 432 GhostRegion*
 433 MidiRegionView::add_ghost (AutomationTimeAxisView& atv)
 434 {
 435         RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*>(&trackview);
 436         assert(rtv);
 437
 438         double unit_position = _region->position () / samples_per_unit;
 439         GhostRegion* ghost = new GhostRegion (atv, unit_position);
 440
 441         ghost->set_height ();
 442         ghost->set_duration (_region->length() / samples_per_unit);
 443         ghosts.push_back (ghost);
 444
 445         ghost->GoingAway.connect (mem_fun(*this, &MidiRegionView::remove_ghost));
 446
 447         return ghost;
 448 }
 449
 450
 451 /** Begin tracking note state for successive calls to add_event
 452  */
 453 void
 454 MidiRegionView::begin_write()
 455 {
 456         _active_notes = new CanvasNote*[128];
 457         for (unsigned i=0; i < 128; ++i)
 458                 _active_notes[i] = NULL;
 459 }
 460
 461
 462 /** Destroy note state for add_event
 463  */
 464 void
 465 MidiRegionView::end_write()
 466 {
 467         delete[] _active_notes;
 468         _active_notes = NULL;
 469 }
 470
 471
 472 /** Add a MIDI event.
 473  *
 474  * This is used while recording, and handles displaying still-unresolved notes.
 475  * Displaying an existing model is simpler, and done with add_note.
 476  */
 477 void
 478 MidiRegionView::add_event (const MidiEvent& ev)
 479 {
 480         /*printf("Event, time = %f, size = %zu, data = ", ev.time, ev.size);
 481         for (size_t i=0; i < ev.size; ++i) {
 482                 printf("%X ", ev.buffer[i]);
 483         }
 484         printf("\n\n");*/
 485
 486         ArdourCanvas::Group* const group = (ArdourCanvas::Group*)get_canvas_group();
 487
 488         if (midi_view()->note_mode() == Sustained) {
 489                 if ((ev.buffer()[0] & 0xF0) == MIDI_CMD_NOTE_ON) {
 490                         const Byte& note = ev.buffer()[1];
 491                         const double y1 = midi_stream_view()->note_to_y(note);
 492
 493                         CanvasNote* ev_rect = new CanvasNote(*this, *group);
 494                         ev_rect->property_x1() = trackview.editor.frame_to_pixel (
 495                                         (nframes_t)ev.time());
 496                         ev_rect->property_y1() = y1;
 497                         ev_rect->property_x2() = trackview.editor.frame_to_pixel (
 498                                         _region->length());
 499                         ev_rect->property_y2() = y1 + floor(midi_stream_view()->note_height());
 500                         ev_rect->property_fill_color_rgba() = note_fill_color(ev.velocity());
 501                         ev_rect->property_outline_color_rgba() = note_outline_color(ev.velocity());
 502                         /* outline all but right edge */
 503                         ev_rect->property_outline_what() = (guint32) (0x1 & 0x4 & 0x8);
 504
 505                         ev_rect->raise_to_top();
 506
 507                         _events.push_back(ev_rect);
 508                         if (_active_notes)
 509                                 _active_notes[note] = ev_rect;
 510
 511                 } else if ((ev.buffer()[0] & 0xF0) == MIDI_CMD_NOTE_OFF) {
 512                         const Byte& note = ev.buffer()[1];
 513                         if (_active_notes && _active_notes[note]) {
 514                                 _active_notes[note]->property_x2() = trackview.editor.frame_to_pixel((nframes_t)ev.time());
 515                                 _active_notes[note]->property_outline_what() = (guint32) 0xF; // all edges
 516                                 _active_notes[note] = NULL;
 517                         }
 518                 }
 519
 520         } else if (midi_view()->note_mode() == Percussive) {
 521                 const Byte& note = ev.buffer()[1];
 522                 const double diamond_size = midi_stream_view()->note_height() / 2.0;
 523                 const double x = trackview.editor.frame_to_pixel((nframes_t)ev.time());
 524                 const double y = midi_stream_view()->note_to_y(note) + ((diamond_size-2) / 4.0);
 525
 526                 CanvasHit* ev_diamond = new CanvasHit(*this, *group, diamond_size);
 527                 ev_diamond->move(x, y);
 528                 ev_diamond->show();
 529                 ev_diamond->property_fill_color_rgba() = note_fill_color(ev.velocity());
 530                 ev_diamond->property_outline_color_rgba() = note_outline_color(ev.velocity());
 531
 532                 _events.push_back(ev_diamond);
 533         }
 534 }
 535
 536
 537 /** Extend active notes to rightmost edge of region (if length is changed)
 538  */
 539 void
 540 MidiRegionView::extend_active_notes()
 541 {
 542         if (!_active_notes)
 543                 return;
 544
 545         for (unsigned i=0; i < 128; ++i)
 546                 if (_active_notes[i])
 547                         _active_notes[i]->property_x2() = trackview.editor.frame_to_pixel(_region->length());
 548 }
 549
 550
 551 /** Add a MIDI note to the view (with duration).
 552  *
 553  * This does no 'realtime' note resolution, notes from a MidiModel have a
 554  * duration so they can be drawn in full immediately.
 555  */
 556 void
 557 MidiRegionView::add_note (const MidiModel::Note& note)
 558 {
 559         assert(note.time() >= 0);
 560         //assert(note.time() < _region->length());
 561
 562         ArdourCanvas::Group* const group = (ArdourCanvas::Group*)get_canvas_group();
 563
 564         if (midi_view()->note_mode() == Sustained) {
 565                 const double y1 = midi_stream_view()->note_to_y(note.note());
 566
 567                 CanvasNote* ev_rect = new CanvasNote(*this, *group, &note);
 568                 ev_rect->property_x1() = trackview.editor.frame_to_pixel((nframes_t)note.time());
 569                 ev_rect->property_y1() = y1;
 570                 ev_rect->property_x2() = trackview.editor.frame_to_pixel((nframes_t)(note.end_time()));
 571                 ev_rect->property_y2() = y1 + floor(midi_stream_view()->note_height());
 572
 573                 ev_rect->property_fill_color_rgba() = note_fill_color(note.velocity());
 574                 ev_rect->property_outline_color_rgba() = note_outline_color(note.velocity());
 575                 ev_rect->property_outline_what() = (guint32) 0xF; // all edges
 576
 577                 ev_rect->show();
 578                 _events.push_back(ev_rect);
 579
 580         } else if (midi_view()->note_mode() == Percussive) {
 581                 const double diamond_size = midi_stream_view()->note_height() / 2.0;
 582                 const double x = trackview.editor.frame_to_pixel((nframes_t)note.time());
 583                 const double y = midi_stream_view()->note_to_y(note.note()) + ((diamond_size-2) / 4.0);
 584
 585                 CanvasHit* ev_diamond = new CanvasHit(*this, *group, diamond_size);
 586                 ev_diamond->move(x, y);
 587                 ev_diamond->show();
 588                 ev_diamond->property_fill_color_rgba() = note_fill_color(note.velocity());
 589                 ev_diamond->property_outline_color_rgba() = note_outline_color(note.velocity());
 590                 _events.push_back(ev_diamond);
 591         }
 592 }
 593
 594 void
 595 MidiRegionView::delete_selection()
 596 {
 597         assert(_delta_command);
 598
 599         for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i)
 600                 if ((*i)->selected())
 601                         _delta_command->remove(*(*i)->note());
 602
 603         _selection.clear();
 604 }
 605
 606 void
 607 MidiRegionView::clear_selection_except(ArdourCanvas::CanvasMidiEvent* ev)
 608 {
 609         for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i)
 610                 if ((*i)->selected() && (*i) != ev)
 611                         (*i)->selected(false);
 612
 613         _selection.clear();
 614 }
 615
 616 void
 617 MidiRegionView::unique_select(ArdourCanvas::CanvasMidiEvent* ev)
 618 {
 619         for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i)
 620                 if ((*i) != ev)
 621                         (*i)->selected(false);
 622
 623         _selection.clear();
 624         _selection.insert(ev);
 625         ev->selected(true);
 626 }
 627
 628 void
 629 MidiRegionView::note_selected(ArdourCanvas::CanvasMidiEvent* ev, bool add)
 630 {
 631         if ( ! add)
 632                 clear_selection_except(ev);
 633
 634         _selection.insert(ev);
 635         ev->selected(true);
 636 }
 637
 638
 639 void
 640 MidiRegionView::note_deselected(ArdourCanvas::CanvasMidiEvent* ev, bool add)
 641 {
 642         if ( ! add)
 643                 clear_selection_except(ev);
 644
 645         _selection.erase(ev);
 646         ev->selected(false);
 647 }
 648
 649
 650 void
 651 MidiRegionView::update_drag_selection(double last_x, double x, double last_y, double y)
 652 {
 653         // FIXME: so, so, so much slower than this should be
 654         for (std::vector<CanvasMidiEvent*>::iterator i = _events.begin(); i != _events.end(); ++i) {
 655                 if ((*i)->x1() >= last_x && (*i)->x1() <= x && (*i)->y1() >= last_y && (*i)->y1() <= y) {
 656                         (*i)->selected(true);
 657                         _selection.insert(*i);
 658                 } else {
 659                         (*i)->selected(false);
 660                         _selection.erase(*i);
 661                 }
 662         }
 663 }
 664
 665
 666 void
 667 MidiRegionView::move_selection(double dx, double dy)
 668 {
 669         for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i)
 670                 (*i)->item()->move(dx, dy);
 671 }
 672
 673 void
 674 MidiRegionView::note_dropped(CanvasMidiEvent* ev, double dt, uint8_t dnote)
 675 {
 676         // TODO: This would be faster/nicer with a MoveCommand that doesn't need to copy...
 677         if (_selection.find(ev) != _selection.end()) {
 678                 start_delta_command();
 679
 680                 for (Selection::iterator i = _selection.begin(); i != _selection.end(); ++i) {
 681                         command_remove_note(*i);
 682                         MidiModel::Note copy(*(*i)->note());
 683
 684                         copy.set_time((*i)->note()->time() + dt);
 685                         copy.set_note((*i)->note()->note() + dnote);
 686
 687                         command_add_note(copy);
 688                 }
 689                 apply_command();
 690         }
 691 }
 692