gtk2_ardour/midi_time_axis.cc

   1 /*
   2     Copyright (C) 2000 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17 */
  18
  19 #include <cstdlib>
  20 #include <cmath>
  21
  22 #include <algorithm>
  23 #include <string>
  24 #include <vector>
  25
  26 #include <sigc++/bind.h>
  27
  28 #include "pbd/error.h"
  29 #include "pbd/stl_delete.h"
  30 #include "pbd/whitespace.h"
  31 #include "pbd/basename.h"
  32 #include "pbd/enumwriter.h"
  33 #include "pbd/memento_command.h"
  34
  35 #include <gtkmm2ext/gtk_ui.h>
  36 #include <gtkmm2ext/selector.h>
  37 #include <gtkmm2ext/stop_signal.h>
  38 #include <gtkmm2ext/bindable_button.h>
  39 #include <gtkmm2ext/utils.h>
  40
  41 #include "ardour/midi_playlist.h"
  42 #include "ardour/midi_diskstream.h"
  43 #include "ardour/midi_patch_manager.h"
  44 #include "ardour/midi_source.h"
  45 #include "ardour/processor.h"
  46 #include "ardour/ladspa_plugin.h"
  47 #include "ardour/location.h"
  48 #include "ardour/playlist.h"
  49 #include "ardour/region_factory.h"
  50 #include "ardour/session.h"
  51 #include "ardour/session_playlist.h"
  52 #include "ardour/tempo.h"
  53 #include "ardour/utils.h"
  54
  55 #include "add_midi_cc_track_dialog.h"
  56 #include "ardour_ui.h"
  57 #include "automation_line.h"
  58 #include "automation_time_axis.h"
  59 #include "canvas-note-event.h"
  60 #include "canvas_impl.h"
  61 #include "crossfade_view.h"
  62 #include "editor.h"
  63 #include "enums.h"
  64 #include "ghostregion.h"
  65 #include "gui_thread.h"
  66 #include "keyboard.h"
  67 #include "midi_scroomer.h"
  68 #include "midi_streamview.h"
  69 #include "midi_region_view.h"
  70 #include "midi_time_axis.h"
  71 #include "piano_roll_header.h"
  72 #include "playlist_selector.h"
  73 #include "plugin_selector.h"
  74 #include "plugin_ui.h"
  75 #include "point_selection.h"
  76 #include "prompter.h"
  77 #include "region_view.h"
  78 #include "rgb_macros.h"
  79 #include "selection.h"
  80 #include "simplerect.h"
  81 #include "utils.h"
  82
  83 #include "ardour/midi_track.h"
  84
  85 #include "i18n.h"
  86
  87 using namespace ARDOUR;
  88 using namespace PBD;
  89 using namespace Gtk;
  90 using namespace sigc;
  91 using namespace Editing;
  92
  93 // Minimum height at which a control is displayed
  94 static const uint32_t MIDI_CONTROLS_BOX_MIN_HEIGHT = 162;
  95 static const uint32_t KEYBOARD_MIN_HEIGHT = 140;
  96
  97 MidiTimeAxisView::MidiTimeAxisView (PublicEditor& ed, Session& sess,
  98                 boost::shared_ptr<Route> rt, Canvas& canvas)
  99         : AxisView(sess) // virtually inherited
 100         , RouteTimeAxisView(ed, sess, rt, canvas)
 101         , _ignore_signals(false)
 102         , _range_scroomer(0)
 103         , _piano_roll_header(0)
 104         , _note_mode(Sustained)
 105         , _note_mode_item(0)
 106         , _percussion_mode_item(0)
 107         , _color_mode(MeterColors)
 108         , _meter_color_mode_item(0)
 109         , _channel_color_mode_item(0)
 110         , _track_color_mode_item(0)
 111 {
 112         subplugin_menu.set_name ("ArdourContextMenu");
 113
 114         _view = new MidiStreamView (*this);
 115
 116         ignore_toggle = false;
 117
 118         mute_button->set_active (false);
 119         solo_button->set_active (false);
 120
 121         step_edit_insert_position = 0;
 122
 123         if (is_midi_track()) {
 124                 controls_ebox.set_name ("MidiTimeAxisViewControlsBaseUnselected");
 125                 _note_mode = midi_track()->note_mode();
 126         } else { // MIDI bus (which doesn't exist yet..)
 127                 controls_ebox.set_name ("MidiBusControlsBaseUnselected");
 128         }
 129
 130         /* map current state of the route */
 131
 132         processors_changed ();
 133
 134         ensure_xml_node ();
 135
 136         set_state (*xml_node);
 137
 138         _route->processors_changed.connect (mem_fun(*this, &MidiTimeAxisView::processors_changed));
 139
 140         if (is_track()) {
 141                 _piano_roll_header = new PianoRollHeader(*midi_view());
 142                 _range_scroomer = new MidiScroomer(midi_view()->note_range_adjustment);
 143
 144                 controls_hbox.pack_start(*_range_scroomer);
 145                 controls_hbox.pack_start(*_piano_roll_header);
 146
 147                 controls_ebox.set_name ("MidiTrackControlsBaseUnselected");
 148                 controls_base_selected_name = "MidiTrackControlsBaseSelected";
 149                 controls_base_unselected_name = "MidiTrackControlsBaseUnselected";
 150
 151                 midi_view()->NoteRangeChanged.connect (mem_fun(*this, &MidiTimeAxisView::update_range));
 152
 153                 /* ask for notifications of any new RegionViews */
 154                 _view->RegionViewAdded.connect (mem_fun(*this, &MidiTimeAxisView::region_view_added));
 155                 _view->attach ();
 156         }
 157
 158         HBox* midi_controls_hbox = manage(new HBox());
 159
 160         MIDI::Name::MidiPatchManager& patch_manager = MIDI::Name::MidiPatchManager::instance();
 161
 162         MIDI::Name::MasterDeviceNames::Models::const_iterator m = patch_manager.all_models().begin();
 163         for (; m != patch_manager.all_models().end(); ++m) {
 164                 _model_selector.append_text(m->c_str());
 165         }
 166
 167         _model_selector.signal_changed().connect(mem_fun(*this, &MidiTimeAxisView::model_changed));
 168
 169         _custom_device_mode_selector.signal_changed().connect(
 170                         mem_fun(*this, &MidiTimeAxisView::custom_device_mode_changed));
 171
 172         // TODO: persist the choice
 173         // this initializes the comboboxes and sends out the signal
 174         _model_selector.set_active(0);
 175
 176         midi_controls_hbox->pack_start(_channel_selector, true, false);
 177         if (!patch_manager.all_models().empty()) {
 178                 _midi_controls_box.pack_start(_model_selector, true, false);
 179                 _midi_controls_box.pack_start(_custom_device_mode_selector, true, false);
 180         }
 181
 182         _midi_controls_box.pack_start(*midi_controls_hbox, true, true);
 183
 184         controls_vbox.pack_start(_midi_controls_box, false, false);
 185
 186         boost::shared_ptr<MidiDiskstream> diskstream = midi_track()->midi_diskstream();
 187
 188         // restore channel selector settings
 189         _channel_selector.set_channel_mode(diskstream->get_channel_mode(),
 190                         diskstream->get_channel_mask());
 191         _channel_selector.mode_changed.connect(
 192                 mem_fun(*midi_track()->midi_diskstream(), &MidiDiskstream::set_channel_mode));
 193
 194         XMLProperty *prop;
 195         if ((prop = xml_node->property ("color-mode")) != 0) {
 196                 _color_mode = ColorMode (string_2_enum(prop->value(), _color_mode));
 197                 if (_color_mode == ChannelColors) {
 198                         _channel_selector.set_channel_colors(CanvasNoteEvent::midi_channel_colors);
 199                 }
 200         }
 201 }
 202
 203 MidiTimeAxisView::~MidiTimeAxisView ()
 204 {
 205         delete _piano_roll_header;
 206         _piano_roll_header = 0;
 207
 208         delete _range_scroomer;
 209         _range_scroomer = 0;
 210 }
 211
 212 void MidiTimeAxisView::model_changed()
 213 {
 214         std::list<std::string> device_modes = MIDI::Name::MidiPatchManager::instance()
 215                 .custom_device_mode_names_by_model(_model_selector.get_active_text());
 216
 217         _custom_device_mode_selector.clear_items();
 218
 219         for (std::list<std::string>::const_iterator i = device_modes.begin();
 220                         i != device_modes.end(); ++i) {
 221                 cerr << "found custom device mode " << *i << " thread_id: " << pthread_self() << endl;
 222                 _custom_device_mode_selector.append_text(*i);
 223         }
 224
 225         _custom_device_mode_selector.set_active(0);
 226 }
 227
 228 void MidiTimeAxisView::custom_device_mode_changed()
 229 {
 230         _midi_patch_settings_changed.emit(_model_selector.get_active_text(),
 231                         _custom_device_mode_selector.get_active_text());
 232 }
 233
 234 MidiStreamView*
 235 MidiTimeAxisView::midi_view()
 236 {
 237         return dynamic_cast<MidiStreamView*>(_view);
 238 }
 239
 240 guint32
 241 MidiTimeAxisView::show_at (double y, int& nth, Gtk::VBox *parent)
 242 {
 243         ensure_xml_node ();
 244         xml_node->add_property ("shown-editor", "yes");
 245
 246         guint32 ret = TimeAxisView::show_at (y, nth, parent);
 247         return ret;
 248 }
 249
 250 void
 251 MidiTimeAxisView::hide ()
 252 {
 253         ensure_xml_node ();
 254         xml_node->add_property ("shown-editor", "no");
 255
 256         TimeAxisView::hide ();
 257 }
 258
 259 void
 260 MidiTimeAxisView::set_height (uint32_t h)
 261 {
 262         RouteTimeAxisView::set_height (h);
 263
 264         if (height >= MIDI_CONTROLS_BOX_MIN_HEIGHT) {
 265                 _midi_controls_box.show();
 266         } else {
 267                 _midi_controls_box.hide();
 268         }
 269
 270         if (height >= KEYBOARD_MIN_HEIGHT) {
 271                 if (is_track() && _range_scroomer)
 272                         _range_scroomer->show();
 273                 if (is_track() && _piano_roll_header)
 274                         _piano_roll_header->show();
 275         } else {
 276                 if (is_track() && _range_scroomer)
 277                         _range_scroomer->hide();
 278                 if (is_track() && _piano_roll_header)
 279                         _piano_roll_header->hide();
 280         }
 281 }
 282
 283 void
 284 MidiTimeAxisView::append_extra_display_menu_items ()
 285 {
 286         using namespace Menu_Helpers;
 287
 288         MenuList& items = display_menu->items();
 289
 290         // Note range
 291         Menu *range_menu = manage(new Menu);
 292         MenuList& range_items = range_menu->items();
 293         range_menu->set_name ("ArdourContextMenu");
 294
 295         range_items.push_back (MenuElem (_("Show Full Range"), bind (
 296                         mem_fun(*this, &MidiTimeAxisView::set_note_range),
 297                         MidiStreamView::FullRange)));
 298
 299         range_items.push_back (MenuElem (_("Fit Contents"), bind (
 300                         mem_fun(*this, &MidiTimeAxisView::set_note_range),
 301                         MidiStreamView::ContentsRange)));
 302
 303         items.push_back (MenuElem (_("Note range"), *range_menu));
 304
 305         items.push_back (MenuElem (_("Note mode"), *build_note_mode_menu()));
 306 }
 307
 308 void
 309 MidiTimeAxisView::build_automation_action_menu ()
 310 {
 311         using namespace Menu_Helpers;
 312
 313         RouteTimeAxisView::build_automation_action_menu ();
 314
 315         MenuList& automation_items = automation_action_menu->items();
 316
 317         automation_items.push_back (SeparatorElem());
 318         automation_items.push_back (MenuElem (_("Controller..."),
 319                         mem_fun(*this, &MidiTimeAxisView::add_cc_track)));
 320         automation_items.push_back (MenuElem (_("Program Change"),
 321                         sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 322                                 Evoral::Parameter(MidiPgmChangeAutomation))));
 323         automation_items.push_back (MenuElem (_("Bender"),
 324                         sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 325                                 Evoral::Parameter(MidiPitchBenderAutomation))));
 326         automation_items.push_back (MenuElem (_("Pressure"),
 327                         sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 328                                 Evoral::Parameter(MidiChannelPressureAutomation))));
 329 }
 330
 331 Gtk::Menu*
 332 MidiTimeAxisView::build_note_mode_menu()
 333 {
 334         using namespace Menu_Helpers;
 335
 336         Menu* mode_menu = manage (new Menu);
 337         MenuList& items = mode_menu->items();
 338         mode_menu->set_name ("ArdourContextMenu");
 339
 340         RadioMenuItem::Group mode_group;
 341         items.push_back (RadioMenuElem (mode_group, _("Sustained"),
 342                                 bind (mem_fun (*this, &MidiTimeAxisView::set_note_mode), Sustained)));
 343         _note_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 344         _note_mode_item->set_active(_note_mode == Sustained);
 345
 346         items.push_back (RadioMenuElem (mode_group, _("Percussive"),
 347                                 bind (mem_fun (*this, &MidiTimeAxisView::set_note_mode), Percussive)));
 348         _percussion_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 349         _percussion_mode_item->set_active(_note_mode == Percussive);
 350
 351         return mode_menu;
 352 }
 353
 354 Gtk::Menu*
 355 MidiTimeAxisView::build_color_mode_menu()
 356 {
 357         using namespace Menu_Helpers;
 358
 359         Menu* mode_menu = manage (new Menu);
 360         MenuList& items = mode_menu->items();
 361         mode_menu->set_name ("ArdourContextMenu");
 362
 363         RadioMenuItem::Group mode_group;
 364         items.push_back (RadioMenuElem (mode_group, _("Meter Colors"),
 365                                 bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), MeterColors)));
 366         _meter_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 367         _meter_color_mode_item->set_active(_color_mode == MeterColors);
 368
 369         items.push_back (RadioMenuElem (mode_group, _("Channel Colors"),
 370                                 bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), ChannelColors)));
 371         _channel_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 372         _channel_color_mode_item->set_active(_color_mode == ChannelColors);
 373
 374         items.push_back (RadioMenuElem (mode_group, _("Track Color"),
 375                                 bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), TrackColor)));
 376         _channel_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 377         _channel_color_mode_item->set_active(_color_mode == TrackColor);
 378
 379         return mode_menu;
 380 }
 381
 382 void
 383 MidiTimeAxisView::set_note_mode(NoteMode mode)
 384 {
 385         if (_note_mode != mode || midi_track()->note_mode() != mode) {
 386                 _note_mode = mode;
 387                 midi_track()->set_note_mode(mode);
 388                 _view->redisplay_diskstream();
 389         }
 390 }
 391
 392 void
 393 MidiTimeAxisView::set_color_mode(ColorMode mode)
 394 {
 395         if (_color_mode != mode) {
 396                 if (mode == ChannelColors) {
 397                         _channel_selector.set_channel_colors(CanvasNoteEvent::midi_channel_colors);
 398                 } else {
 399                         _channel_selector.set_default_channel_color();
 400                 }
 401
 402                 _color_mode = mode;
 403                 xml_node->add_property ("color-mode", enum_2_string(_color_mode));
 404                 _view->redisplay_diskstream();
 405         }
 406 }
 407
 408 void
 409 MidiTimeAxisView::set_note_range(MidiStreamView::VisibleNoteRange range)
 410 {
 411         if (!_ignore_signals)
 412                 midi_view()->set_note_range(range);
 413 }
 414
 415
 416 void
 417 MidiTimeAxisView::update_range()
 418 {
 419         MidiGhostRegion* mgr;
 420
 421         for(list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 422                 if ((mgr = dynamic_cast<MidiGhostRegion*>(*i)) != 0) {
 423                         mgr->update_range();
 424                 }
 425         }
 426 }
 427
 428 void
 429 MidiTimeAxisView::show_all_automation ()
 430 {
 431         if (midi_track()) {
 432                 const set<Evoral::Parameter> params = midi_track()->midi_diskstream()->
 433                                 midi_playlist()->contained_automation();
 434
 435                 for (set<Evoral::Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
 436                         create_automation_child(*i, true);
 437                 }
 438         }
 439
 440         RouteTimeAxisView::show_all_automation ();
 441 }
 442
 443 void
 444 MidiTimeAxisView::show_existing_automation ()
 445 {
 446         if (midi_track()) {
 447                 const set<Evoral::Parameter> params = midi_track()->midi_diskstream()->
 448                                 midi_playlist()->contained_automation();
 449
 450                 for (set<Evoral::Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
 451                         create_automation_child(*i, true);
 452                 }
 453         }
 454
 455         RouteTimeAxisView::show_existing_automation ();
 456 }
 457
 458 /** Prompt for a controller with a dialog and add an automation track for it
 459  */
 460 void
 461 MidiTimeAxisView::add_cc_track()
 462 {
 463         int response;
 464         Evoral::Parameter param(0, 0, 0);
 465
 466         {
 467                 AddMidiCCTrackDialog dialog;
 468                 dialog.set_transient_for (_editor);
 469                 response = dialog.run();
 470
 471                 if (response == Gtk::RESPONSE_ACCEPT)
 472                         param = dialog.parameter();
 473         }
 474
 475         if (param.type() != 0 && response == Gtk::RESPONSE_ACCEPT)
 476                 create_automation_child(param, true);
 477 }
 478
 479
 480 /** Add an automation track for the given parameter (pitch bend, channel pressure).
 481  */
 482 void
 483 MidiTimeAxisView::add_parameter_track(const Evoral::Parameter& param)
 484 {
 485         if ( !EventTypeMap::instance().is_midi_parameter(param) ) {
 486                 error << "MidiTimeAxisView: unknown automation child "
 487                         << ARDOUR::EventTypeMap::instance().to_symbol(param) << endmsg;
 488                 return;
 489         }
 490
 491         // create the parameter lane for each selected channel
 492         uint16_t selected_channels = _channel_selector.get_selected_channels();
 493
 494         for (uint8_t i = 0; i < 16; i++) {
 495                 if (selected_channels & (0x0001 << i)) {
 496                         Evoral::Parameter param_with_channel(param.type(), i, param.id());
 497                         create_automation_child(param_with_channel, true);
 498                 }
 499         }
 500 }
 501
 502 void
 503 MidiTimeAxisView::create_automation_child (const Evoral::Parameter& param, bool show)
 504 {
 505         /* These controllers are region "automation", so we do not create
 506          * an AutomationList/Line for the track */
 507
 508         if (param.type() == NullAutomation) {
 509                 cerr << "WARNING: Attempt to create NullAutomation child, ignoring" << endl;
 510                 return;
 511         }
 512
 513         AutomationTracks::iterator existing = _automation_tracks.find(param);
 514         if (existing != _automation_tracks.end())
 515                 return;
 516
 517         boost::shared_ptr<AutomationControl> c = _route->get_control (param);
 518
 519         assert(c);
 520
 521         boost::shared_ptr<AutomationTimeAxisView> track(new AutomationTimeAxisView (_session,
 522                         _route, boost::shared_ptr<ARDOUR::Automatable>(), c,
 523                         _editor,
 524                         *this,
 525                         true,
 526                         parent_canvas,
 527                         _route->describe_parameter(param)));
 528
 529         add_automation_child(param, track, show);
 530 }
 531
 532
 533 void
 534 MidiTimeAxisView::route_active_changed ()
 535 {
 536         RouteUI::route_active_changed ();
 537
 538         if (is_track()) {
 539                 if (_route->active()) {
 540                         controls_ebox.set_name ("MidiTrackControlsBaseUnselected");
 541                         controls_base_selected_name = "MidiTrackControlsBaseSelected";
 542                         controls_base_unselected_name = "MidiTrackControlsBaseUnselected";
 543                 } else {
 544                         controls_ebox.set_name ("MidiTrackControlsBaseInactiveUnselected");
 545                         controls_base_selected_name = "MidiTrackControlsBaseInactiveSelected";
 546                         controls_base_unselected_name = "MidiTrackControlsBaseInactiveUnselected";
 547                 }
 548         } else {
 549
 550                 throw; // wha?
 551
 552                 if (_route->active()) {
 553                         controls_ebox.set_name ("BusControlsBaseUnselected");
 554                         controls_base_selected_name = "BusControlsBaseSelected";
 555                         controls_base_unselected_name = "BusControlsBaseUnselected";
 556                 } else {
 557                         controls_ebox.set_name ("BusControlsBaseInactiveUnselected");
 558                         controls_base_selected_name = "BusControlsBaseInactiveSelected";
 559                         controls_base_unselected_name = "BusControlsBaseInactiveUnselected";
 560                 }
 561         }
 562 }
 563
 564 void
 565 MidiTimeAxisView::start_step_editing ()
 566 {
 567         step_edit_insert_position = _editor.get_preferred_edit_position ();
 568         step_edit_beat_pos = 0;
 569         step_edit_region = playlist()->top_region_at (step_edit_insert_position);
 570
 571         if (step_edit_region) {
 572                 RegionView* rv = view()->find_view (step_edit_region);
 573                 step_edit_region_view = dynamic_cast<MidiRegionView*> (rv);
 574         } else {
 575                 step_edit_region_view = 0;
 576         }
 577
 578         midi_track()->set_step_editing (true);
 579 }
 580
 581 void
 582 MidiTimeAxisView::stop_step_editing ()
 583 {
 584         midi_track()->set_step_editing (false);
 585 }
 586
 587 void
 588 MidiTimeAxisView::check_step_edit ()
 589 {
 590         MidiRingBuffer<nframes_t>& incoming (midi_track()->step_edit_ring_buffer());
 591         Evoral::Note<Evoral::MusicalTime> note;
 592         uint8_t* buf;
 593         uint32_t bufsize = 32;
 594
 595         buf = new uint8_t[bufsize];
 596
 597         while (incoming.read_space()) {
 598                 nframes_t time;
 599                 Evoral::EventType type;
 600                 uint32_t size;
 601
 602                 incoming.read_prefix (&time, &type, &size);
 603
 604                 if (size > bufsize) {
 605                         delete [] buf;
 606                         bufsize = size;
 607                         buf = new uint8_t[bufsize];
 608                 }
 609
 610                 incoming.read_contents (size, buf);
 611
 612                 if ((buf[0] & 0xf0) == MIDI_CMD_NOTE_ON) {
 613
 614                         if (step_edit_region == 0) {
 615
 616                                 step_edit_region = add_region (step_edit_insert_position);
 617                                 RegionView* rv = view()->find_view (step_edit_region);
 618
 619                                 if (rv) {
 620                                         step_edit_region_view = dynamic_cast<MidiRegionView*>(rv);
 621                                 } else {
 622                                         fatal << X_("programming error: no view found for new MIDI region") << endmsg;
 623                                         /*NOTREACHED*/
 624                                 }
 625                         }
 626
 627                         if (step_edit_region_view) {
 628
 629                                 bool success;
 630                                 Evoral::MusicalTime beats = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
 631
 632                                 if (!success) {
 633                                         continue;
 634                                 }
 635
 636                                 step_edit_region_view->add_note (buf[0] & 0xf, buf[1], buf[2], step_edit_beat_pos, beats);
 637                                 step_edit_beat_pos += beats;
 638                         }
 639                 }
 640
 641         }
 642 }
 643
 644 void
 645 MidiTimeAxisView::step_edit_rest ()
 646 {
 647         bool success;
 648         Evoral::MusicalTime beats = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
 649         step_edit_beat_pos += beats;
 650 }
 651
 652 boost::shared_ptr<Region>
 653 MidiTimeAxisView::add_region (nframes64_t pos)
 654 {
 655         Editor* real_editor = dynamic_cast<Editor*> (&_editor);
 656
 657         real_editor->begin_reversible_command (_("create region"));
 658         XMLNode &before = playlist()->get_state();
 659
 660         nframes64_t start = pos;
 661         real_editor->snap_to (start, -1);
 662         const Meter& m = _session.tempo_map().meter_at(start);
 663         const Tempo& t = _session.tempo_map().tempo_at(start);
 664         double length = floor (m.frames_per_bar(t, _session.frame_rate()));
 665
 666         const boost::shared_ptr<MidiDiskstream> diskstream =
 667                 boost::dynamic_pointer_cast<MidiDiskstream>(view()->trackview().track()->diskstream());
 668
 669         boost::shared_ptr<Source> src = _session.create_midi_source_for_session (*diskstream.get());
 670
 671         boost::shared_ptr<Region> region = (RegionFactory::create (src, 0, (nframes_t) length,
 672                                                                    PBD::basename_nosuffix(src->name())));
 673
 674         playlist()->add_region (region, start);
 675         XMLNode &after = playlist()->get_state();
 676         _session.add_command (new MementoCommand<Playlist> (*playlist().get(), &before, &after));
 677
 678         real_editor->commit_reversible_command();
 679
 680         return region;
 681 }