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 Editing;
  91
  92 // Minimum height at which a control is displayed
  93 static const uint32_t MIDI_CONTROLS_BOX_MIN_HEIGHT = 162;
  94 static const uint32_t KEYBOARD_MIN_HEIGHT = 140;
  95
  96 MidiTimeAxisView::MidiTimeAxisView (PublicEditor& ed, Session* sess,
  97                 boost::shared_ptr<Route> rt, Canvas& canvas)
  98         : AxisView(sess) // virtually inherited
  99         , RouteTimeAxisView(ed, sess, rt, canvas)
 100         , _ignore_signals(false)
 101         , _range_scroomer(0)
 102         , _piano_roll_header(0)
 103         , _note_mode(Sustained)
 104         , _note_mode_item(0)
 105         , _percussion_mode_item(0)
 106         , _color_mode(MeterColors)
 107         , _meter_color_mode_item(0)
 108         , _channel_color_mode_item(0)
 109         , _track_color_mode_item(0)
 110         , _step_edit_item (0)
 111         , _midi_thru_item (0)
 112         , default_channel_menu (0)
 113 {
 114         subplugin_menu.set_name ("ArdourContextMenu");
 115
 116         _view = new MidiStreamView (*this);
 117
 118         ignore_toggle = false;
 119
 120         mute_button->set_active (false);
 121         solo_button->set_active (false);
 122
 123         step_edit_insert_position = 0;
 124
 125         if (is_midi_track()) {
 126                 controls_ebox.set_name ("MidiTimeAxisViewControlsBaseUnselected");
 127                 _note_mode = midi_track()->note_mode();
 128         } else { // MIDI bus (which doesn't exist yet..)
 129                 controls_ebox.set_name ("MidiBusControlsBaseUnselected");
 130         }
 131
 132         /* map current state of the route */
 133
 134         processors_changed (RouteProcessorChange ());
 135
 136         ensure_xml_node ();
 137
 138         set_state (*xml_node, Stateful::loading_state_version);
 139
 140         _route->processors_changed.connect (sigc::mem_fun(*this, &MidiTimeAxisView::processors_changed));
 141
 142         if (is_track()) {
 143                 _piano_roll_header = new PianoRollHeader(*midi_view());
 144                 _range_scroomer = new MidiScroomer(midi_view()->note_range_adjustment);
 145
 146                 controls_hbox.pack_start(*_range_scroomer);
 147                 controls_hbox.pack_start(*_piano_roll_header);
 148
 149                 controls_ebox.set_name ("MidiTrackControlsBaseUnselected");
 150                 controls_base_selected_name = "MidiTrackControlsBaseSelected";
 151                 controls_base_unselected_name = "MidiTrackControlsBaseUnselected";
 152
 153                 midi_view()->NoteRangeChanged.connect (sigc::mem_fun(*this, &MidiTimeAxisView::update_range));
 154
 155                 /* ask for notifications of any new RegionViews */
 156                 _view->RegionViewAdded.connect (sigc::mem_fun(*this, &MidiTimeAxisView::region_view_added));
 157                 _view->attach ();
 158         }
 159
 160         HBox* midi_controls_hbox = manage(new HBox());
 161
 162         MIDI::Name::MidiPatchManager& patch_manager = MIDI::Name::MidiPatchManager::instance();
 163
 164         MIDI::Name::MasterDeviceNames::Models::const_iterator m = patch_manager.all_models().begin();
 165         for (; m != patch_manager.all_models().end(); ++m) {
 166                 _model_selector.append_text(m->c_str());
 167         }
 168
 169         _model_selector.signal_changed().connect(sigc::mem_fun(*this, &MidiTimeAxisView::model_changed));
 170
 171         _custom_device_mode_selector.signal_changed().connect(
 172                         sigc::mem_fun(*this, &MidiTimeAxisView::custom_device_mode_changed));
 173
 174         // TODO: persist the choice
 175         // this initializes the comboboxes and sends out the signal
 176         _model_selector.set_active(0);
 177
 178         midi_controls_hbox->pack_start(_channel_selector, true, false);
 179         if (!patch_manager.all_models().empty()) {
 180                 _midi_controls_box.pack_start(_model_selector, true, false);
 181                 _midi_controls_box.pack_start(_custom_device_mode_selector, true, false);
 182         }
 183
 184         _midi_controls_box.pack_start(*midi_controls_hbox, true, true);
 185
 186         controls_vbox.pack_start(_midi_controls_box, false, false);
 187
 188         boost::shared_ptr<MidiDiskstream> diskstream = midi_track()->midi_diskstream();
 189
 190         // restore channel selector settings
 191         _channel_selector.set_channel_mode(diskstream->get_channel_mode(),
 192                         diskstream->get_channel_mask());
 193         _channel_selector.mode_changed.connect(
 194                 sigc::mem_fun(*midi_track()->midi_diskstream(), &MidiDiskstream::set_channel_mode));
 195
 196         XMLProperty *prop;
 197         if ((prop = xml_node->property ("color-mode")) != 0) {
 198                 _color_mode = ColorMode (string_2_enum(prop->value(), _color_mode));
 199                 if (_color_mode == ChannelColors) {
 200                         _channel_selector.set_channel_colors(CanvasNoteEvent::midi_channel_colors);
 201                 }
 202         }
 203
 204         if ((prop = xml_node->property ("note-mode")) != 0) {
 205                 _note_mode = NoteMode (string_2_enum(prop->value(), _note_mode));
 206                 if (_percussion_mode_item) {
 207                         _percussion_mode_item->set_active (_note_mode == Percussive);
 208                 }
 209         }
 210 }
 211
 212 MidiTimeAxisView::~MidiTimeAxisView ()
 213 {
 214         delete _piano_roll_header;
 215         _piano_roll_header = 0;
 216
 217         delete _range_scroomer;
 218         _range_scroomer = 0;
 219 }
 220
 221 void MidiTimeAxisView::model_changed()
 222 {
 223         std::list<std::string> device_modes = MIDI::Name::MidiPatchManager::instance()
 224                 .custom_device_mode_names_by_model(_model_selector.get_active_text());
 225
 226         _custom_device_mode_selector.clear_items();
 227
 228         for (std::list<std::string>::const_iterator i = device_modes.begin();
 229                         i != device_modes.end(); ++i) {
 230                 cerr << "found custom device mode " << *i << " thread_id: " << pthread_self() << endl;
 231                 _custom_device_mode_selector.append_text(*i);
 232         }
 233
 234         _custom_device_mode_selector.set_active(0);
 235 }
 236
 237 void MidiTimeAxisView::custom_device_mode_changed()
 238 {
 239         _midi_patch_settings_changed.emit(_model_selector.get_active_text(),
 240                         _custom_device_mode_selector.get_active_text());
 241 }
 242
 243 MidiStreamView*
 244 MidiTimeAxisView::midi_view()
 245 {
 246         return dynamic_cast<MidiStreamView*>(_view);
 247 }
 248
 249 guint32
 250 MidiTimeAxisView::show_at (double y, int& nth, Gtk::VBox *parent)
 251 {
 252         ensure_xml_node ();
 253         xml_node->add_property ("shown-editor", "yes");
 254
 255         guint32 ret = TimeAxisView::show_at (y, nth, parent);
 256         return ret;
 257 }
 258
 259 void
 260 MidiTimeAxisView::hide ()
 261 {
 262         ensure_xml_node ();
 263         xml_node->add_property ("shown-editor", "no");
 264
 265         TimeAxisView::hide ();
 266 }
 267
 268 void
 269 MidiTimeAxisView::set_height (uint32_t h)
 270 {
 271         RouteTimeAxisView::set_height (h);
 272
 273         if (height >= MIDI_CONTROLS_BOX_MIN_HEIGHT) {
 274                 _midi_controls_box.show();
 275         } else {
 276                 _midi_controls_box.hide();
 277         }
 278
 279         if (height >= KEYBOARD_MIN_HEIGHT) {
 280                 if (is_track() && _range_scroomer)
 281                         _range_scroomer->show();
 282                 if (is_track() && _piano_roll_header)
 283                         _piano_roll_header->show();
 284         } else {
 285                 if (is_track() && _range_scroomer)
 286                         _range_scroomer->hide();
 287                 if (is_track() && _piano_roll_header)
 288                         _piano_roll_header->hide();
 289         }
 290 }
 291
 292 void
 293 MidiTimeAxisView::append_extra_display_menu_items ()
 294 {
 295         using namespace Menu_Helpers;
 296
 297         MenuList& items = display_menu->items();
 298
 299         // Note range
 300         Menu *range_menu = manage(new Menu);
 301         MenuList& range_items = range_menu->items();
 302         range_menu->set_name ("ArdourContextMenu");
 303
 304         range_items.push_back (MenuElem (_("Show Full Range"), sigc::bind (
 305                         sigc::mem_fun(*this, &MidiTimeAxisView::set_note_range),
 306                         MidiStreamView::FullRange)));
 307
 308         range_items.push_back (MenuElem (_("Fit Contents"), sigc::bind (
 309                         sigc::mem_fun(*this, &MidiTimeAxisView::set_note_range),
 310                         MidiStreamView::ContentsRange)));
 311
 312         items.push_back (MenuElem (_("Note range"), *range_menu));
 313         items.push_back (MenuElem (_("Note mode"), *build_note_mode_menu()));
 314         items.push_back (MenuElem (_("Default Channel"), *build_def_channel_menu()));
 315
 316         items.push_back (CheckMenuElem (_("MIDI Thru"), sigc::mem_fun(*this, &MidiTimeAxisView::toggle_midi_thru)));
 317         _midi_thru_item = dynamic_cast<CheckMenuItem*>(&items.back());
 318 }
 319
 320 Gtk::Menu*
 321 MidiTimeAxisView::build_def_channel_menu ()
 322 {
 323         using namespace Menu_Helpers;
 324
 325         if (default_channel_menu == 0) {
 326                 default_channel_menu = manage (new Menu ());
 327         }
 328
 329         uint8_t defchn = midi_track()->default_channel();
 330         MenuList& def_channel_items = default_channel_menu->items();
 331         RadioMenuItem* item;
 332         RadioMenuItem::Group dc_group;
 333
 334         for (int i = 0; i < 16; ++i) {
 335                 char buf[4];
 336                 snprintf (buf, sizeof (buf), "%d", i+1);
 337
 338                 def_channel_items.push_back (RadioMenuElem (dc_group, buf,
 339                                                             sigc::bind (sigc::mem_fun (*this, &MidiTimeAxisView::set_default_channel), i)));
 340                 item = dynamic_cast<RadioMenuItem*>(&def_channel_items.back());
 341                 item->set_active ((i == defchn));
 342         }
 343
 344         return default_channel_menu;
 345 }
 346
 347 void
 348 MidiTimeAxisView::set_default_channel (int chn)
 349 {
 350         midi_track()->set_default_channel (chn);
 351 }
 352
 353 void
 354 MidiTimeAxisView::toggle_midi_thru ()
 355 {
 356         if (!_midi_thru_item) {
 357                 return;
 358         }
 359
 360         bool view_yn = _midi_thru_item->get_active();
 361         if (view_yn != midi_track()->midi_thru()) {
 362                 midi_track()->set_midi_thru (view_yn);
 363         }
 364 }
 365
 366 void
 367 MidiTimeAxisView::build_automation_action_menu ()
 368 {
 369         using namespace Menu_Helpers;
 370
 371         RouteTimeAxisView::build_automation_action_menu ();
 372
 373         MenuList& automation_items = automation_action_menu->items();
 374
 375         automation_items.push_back (SeparatorElem());
 376         automation_items.push_back (MenuElem (_("Controller..."),
 377                         sigc::mem_fun(*this, &MidiTimeAxisView::add_cc_track)));
 378         automation_items.push_back (MenuElem (_("Program Change"),
 379                         sigc::bind(sigc::mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 380                                 Evoral::Parameter(MidiPgmChangeAutomation))));
 381         automation_items.push_back (MenuElem (_("Bender"),
 382                         sigc::bind(sigc::mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 383                                 Evoral::Parameter(MidiPitchBenderAutomation))));
 384         automation_items.push_back (MenuElem (_("Pressure"),
 385                         sigc::bind(sigc::mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 386                                 Evoral::Parameter(MidiChannelPressureAutomation))));
 387 }
 388
 389 Gtk::Menu*
 390 MidiTimeAxisView::build_note_mode_menu()
 391 {
 392         using namespace Menu_Helpers;
 393
 394         Menu* mode_menu = manage (new Menu);
 395         MenuList& items = mode_menu->items();
 396         mode_menu->set_name ("ArdourContextMenu");
 397
 398         RadioMenuItem::Group mode_group;
 399         items.push_back (RadioMenuElem (mode_group, _("Sustained"),
 400                                 sigc::bind (sigc::mem_fun (*this, &MidiTimeAxisView::set_note_mode), Sustained)));
 401         _note_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 402         _note_mode_item->set_active(_note_mode == Sustained);
 403
 404         items.push_back (RadioMenuElem (mode_group, _("Percussive"),
 405                                 sigc::bind (sigc::mem_fun (*this, &MidiTimeAxisView::set_note_mode), Percussive)));
 406         _percussion_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 407         _percussion_mode_item->set_active(_note_mode == Percussive);
 408
 409         return mode_menu;
 410 }
 411
 412 Gtk::Menu*
 413 MidiTimeAxisView::build_color_mode_menu()
 414 {
 415         using namespace Menu_Helpers;
 416
 417         Menu* mode_menu = manage (new Menu);
 418         MenuList& items = mode_menu->items();
 419         mode_menu->set_name ("ArdourContextMenu");
 420
 421         RadioMenuItem::Group mode_group;
 422         items.push_back (RadioMenuElem (mode_group, _("Meter Colors"),
 423                                 sigc::bind (sigc::mem_fun (*this, &MidiTimeAxisView::set_color_mode), MeterColors)));
 424         _meter_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 425         _meter_color_mode_item->set_active(_color_mode == MeterColors);
 426
 427         items.push_back (RadioMenuElem (mode_group, _("Channel Colors"),
 428                                 sigc::bind (sigc::mem_fun (*this, &MidiTimeAxisView::set_color_mode), ChannelColors)));
 429         _channel_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 430         _channel_color_mode_item->set_active(_color_mode == ChannelColors);
 431
 432         items.push_back (RadioMenuElem (mode_group, _("Track Color"),
 433                                 sigc::bind (sigc::mem_fun (*this, &MidiTimeAxisView::set_color_mode), TrackColor)));
 434         _channel_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 435         _channel_color_mode_item->set_active(_color_mode == TrackColor);
 436
 437         return mode_menu;
 438 }
 439
 440 void
 441 MidiTimeAxisView::set_note_mode(NoteMode mode)
 442 {
 443         if (_note_mode != mode || midi_track()->note_mode() != mode) {
 444                 _note_mode = mode;
 445                 midi_track()->set_note_mode(mode);
 446                 xml_node->add_property ("note-mode", enum_2_string(_note_mode));
 447                 _view->redisplay_diskstream();
 448         }
 449 }
 450
 451 void
 452 MidiTimeAxisView::set_color_mode(ColorMode mode)
 453 {
 454         if (_color_mode != mode) {
 455                 if (mode == ChannelColors) {
 456                         _channel_selector.set_channel_colors(CanvasNoteEvent::midi_channel_colors);
 457                 } else {
 458                         _channel_selector.set_default_channel_color();
 459                 }
 460
 461                 _color_mode = mode;
 462                 xml_node->add_property ("color-mode", enum_2_string(_color_mode));
 463                 _view->redisplay_diskstream();
 464         }
 465 }
 466
 467 void
 468 MidiTimeAxisView::set_note_range(MidiStreamView::VisibleNoteRange range)
 469 {
 470         if (!_ignore_signals)
 471                 midi_view()->set_note_range(range);
 472 }
 473
 474
 475 void
 476 MidiTimeAxisView::update_range()
 477 {
 478         MidiGhostRegion* mgr;
 479
 480         for(list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 481                 if ((mgr = dynamic_cast<MidiGhostRegion*>(*i)) != 0) {
 482                         mgr->update_range();
 483                 }
 484         }
 485 }
 486
 487 void
 488 MidiTimeAxisView::show_all_automation ()
 489 {
 490         if (midi_track()) {
 491                 const set<Evoral::Parameter> params = midi_track()->midi_diskstream()->
 492                                 midi_playlist()->contained_automation();
 493
 494                 for (set<Evoral::Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
 495                         create_automation_child(*i, true);
 496                 }
 497         }
 498
 499         RouteTimeAxisView::show_all_automation ();
 500 }
 501
 502 void
 503 MidiTimeAxisView::show_existing_automation ()
 504 {
 505         if (midi_track()) {
 506                 const set<Evoral::Parameter> params = midi_track()->midi_diskstream()->
 507                                 midi_playlist()->contained_automation();
 508
 509                 for (set<Evoral::Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
 510                         create_automation_child(*i, true);
 511                 }
 512         }
 513
 514         RouteTimeAxisView::show_existing_automation ();
 515 }
 516
 517 /** Prompt for a controller with a dialog and add an automation track for it
 518  */
 519 void
 520 MidiTimeAxisView::add_cc_track()
 521 {
 522         int response;
 523         Evoral::Parameter param(0, 0, 0);
 524
 525         {
 526                 AddMidiCCTrackDialog dialog;
 527                 dialog.set_transient_for (_editor);
 528                 response = dialog.run();
 529
 530                 if (response == Gtk::RESPONSE_ACCEPT)
 531                         param = dialog.parameter();
 532         }
 533
 534         if (param.type() != 0 && response == Gtk::RESPONSE_ACCEPT)
 535                 create_automation_child(param, true);
 536 }
 537
 538
 539 /** Add an automation track for the given parameter (pitch bend, channel pressure).
 540  */
 541 void
 542 MidiTimeAxisView::add_parameter_track(const Evoral::Parameter& param)
 543 {
 544         if ( !EventTypeMap::instance().is_midi_parameter(param) ) {
 545                 error << "MidiTimeAxisView: unknown automation child "
 546                         << ARDOUR::EventTypeMap::instance().to_symbol(param) << endmsg;
 547                 return;
 548         }
 549
 550         // create the parameter lane for each selected channel
 551         uint16_t selected_channels = _channel_selector.get_selected_channels();
 552
 553         for (uint8_t i = 0; i < 16; i++) {
 554                 if (selected_channels & (0x0001 << i)) {
 555                         Evoral::Parameter param_with_channel(param.type(), i, param.id());
 556                         create_automation_child(param_with_channel, true);
 557                 }
 558         }
 559 }
 560
 561 void
 562 MidiTimeAxisView::create_automation_child (const Evoral::Parameter& param, bool show)
 563 {
 564         /* These controllers are region "automation", so we do not create
 565          * an AutomationList/Line for the track */
 566
 567         if (param.type() == NullAutomation) {
 568                 cerr << "WARNING: Attempt to create NullAutomation child, ignoring" << endl;
 569                 return;
 570         }
 571
 572         AutomationTracks::iterator existing = _automation_tracks.find(param);
 573         if (existing != _automation_tracks.end())
 574                 return;
 575
 576         boost::shared_ptr<AutomationControl> c = _route->get_control (param);
 577
 578         assert(c);
 579
 580         boost::shared_ptr<AutomationTimeAxisView> track(new AutomationTimeAxisView (_session,
 581                         _route, boost::shared_ptr<ARDOUR::Automatable>(), c,
 582                         _editor,
 583                         *this,
 584                         true,
 585                         parent_canvas,
 586                         _route->describe_parameter(param)));
 587
 588         add_automation_child(param, track, show);
 589 }
 590
 591
 592 void
 593 MidiTimeAxisView::route_active_changed ()
 594 {
 595         RouteUI::route_active_changed ();
 596
 597         if (is_track()) {
 598                 if (_route->active()) {
 599                         controls_ebox.set_name ("MidiTrackControlsBaseUnselected");
 600                         controls_base_selected_name = "MidiTrackControlsBaseSelected";
 601                         controls_base_unselected_name = "MidiTrackControlsBaseUnselected";
 602                 } else {
 603                         controls_ebox.set_name ("MidiTrackControlsBaseInactiveUnselected");
 604                         controls_base_selected_name = "MidiTrackControlsBaseInactiveSelected";
 605                         controls_base_unselected_name = "MidiTrackControlsBaseInactiveUnselected";
 606                 }
 607         } else {
 608
 609                 throw; // wha?
 610
 611                 if (_route->active()) {
 612                         controls_ebox.set_name ("BusControlsBaseUnselected");
 613                         controls_base_selected_name = "BusControlsBaseSelected";
 614                         controls_base_unselected_name = "BusControlsBaseUnselected";
 615                 } else {
 616                         controls_ebox.set_name ("BusControlsBaseInactiveUnselected");
 617                         controls_base_selected_name = "BusControlsBaseInactiveSelected";
 618                         controls_base_unselected_name = "BusControlsBaseInactiveUnselected";
 619                 }
 620         }
 621 }
 622
 623 void
 624 MidiTimeAxisView::start_step_editing ()
 625 {
 626         step_edit_insert_position = _editor.get_preferred_edit_position ();
 627         step_edit_beat_pos = 0;
 628         step_edit_region = playlist()->top_region_at (step_edit_insert_position);
 629
 630         if (step_edit_region) {
 631                 RegionView* rv = view()->find_view (step_edit_region);
 632                 step_edit_region_view = dynamic_cast<MidiRegionView*> (rv);
 633         } else {
 634                 step_edit_region_view = 0;
 635         }
 636
 637         midi_track()->set_step_editing (true);
 638 }
 639
 640 void
 641 MidiTimeAxisView::stop_step_editing ()
 642 {
 643         midi_track()->set_step_editing (false);
 644 }
 645
 646 void
 647 MidiTimeAxisView::check_step_edit ()
 648 {
 649         MidiRingBuffer<nframes_t>& incoming (midi_track()->step_edit_ring_buffer());
 650         Evoral::Note<Evoral::MusicalTime> note;
 651         uint8_t* buf;
 652         uint32_t bufsize = 32;
 653
 654         buf = new uint8_t[bufsize];
 655
 656         while (incoming.read_space()) {
 657                 nframes_t time;
 658                 Evoral::EventType type;
 659                 uint32_t size;
 660
 661                 incoming.read_prefix (&time, &type, &size);
 662
 663                 if (size > bufsize) {
 664                         delete [] buf;
 665                         bufsize = size;
 666                         buf = new uint8_t[bufsize];
 667                 }
 668
 669                 incoming.read_contents (size, buf);
 670
 671                 if ((buf[0] & 0xf0) == MIDI_CMD_NOTE_ON) {
 672
 673                         if (step_edit_region == 0) {
 674
 675                                 step_edit_region = add_region (step_edit_insert_position);
 676                                 RegionView* rv = view()->find_view (step_edit_region);
 677
 678                                 if (rv) {
 679                                         step_edit_region_view = dynamic_cast<MidiRegionView*>(rv);
 680                                 } else {
 681                                         fatal << X_("programming error: no view found for new MIDI region") << endmsg;
 682                                         /*NOTREACHED*/
 683                                 }
 684                         }
 685
 686                         if (step_edit_region_view) {
 687
 688                                 bool success;
 689                                 Evoral::MusicalTime beats = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
 690
 691                                 if (!success) {
 692                                         continue;
 693                                 }
 694
 695                                 step_edit_region_view->add_note (buf[0] & 0xf, buf[1], buf[2], step_edit_beat_pos, beats);
 696                                 step_edit_beat_pos += beats;
 697                         }
 698                 }
 699
 700         }
 701 }
 702
 703 void
 704 MidiTimeAxisView::step_edit_rest ()
 705 {
 706         bool success;
 707         Evoral::MusicalTime beats = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
 708         step_edit_beat_pos += beats;
 709 }
 710
 711 boost::shared_ptr<Region>
 712 MidiTimeAxisView::add_region (nframes64_t pos)
 713 {
 714         Editor* real_editor = dynamic_cast<Editor*> (&_editor);
 715
 716         real_editor->begin_reversible_command (_("create region"));
 717         XMLNode &before = playlist()->get_state();
 718
 719         nframes64_t start = pos;
 720         real_editor->snap_to (start, -1);
 721         const Meter& m = _session->tempo_map().meter_at(start);
 722         const Tempo& t = _session->tempo_map().tempo_at(start);
 723         double length = floor (m.frames_per_bar(t, _session->frame_rate()));
 724
 725         const boost::shared_ptr<MidiDiskstream> diskstream =
 726                 boost::dynamic_pointer_cast<MidiDiskstream>(view()->trackview().track()->diskstream());
 727
 728         boost::shared_ptr<Source> src = _session->create_midi_source_for_session (*diskstream.get());
 729
 730         boost::shared_ptr<Region> region = (RegionFactory::create (src, 0, (nframes_t) length,
 731                                                                    PBD::basename_nosuffix(src->name())));
 732
 733         playlist()->add_region (region, start);
 734         XMLNode &after = playlist()->get_state();
 735         _session->add_command (new MementoCommand<Playlist> (*playlist().get(), &before, &after));
 736
 737         real_editor->commit_reversible_command();
 738
 739         return region;
 740 }