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         , _step_edit_item (0)
 112         , _midi_thru_item (0)
 113         , default_channel_menu (0)
 114 {
 115         subplugin_menu.set_name ("ArdourContextMenu");
 116
 117         _view = new MidiStreamView (*this);
 118
 119         ignore_toggle = false;
 120
 121         mute_button->set_active (false);
 122         solo_button->set_active (false);
 123
 124         step_edit_insert_position = 0;
 125
 126         if (is_midi_track()) {
 127                 controls_ebox.set_name ("MidiTimeAxisViewControlsBaseUnselected");
 128                 _note_mode = midi_track()->note_mode();
 129         } else { // MIDI bus (which doesn't exist yet..)
 130                 controls_ebox.set_name ("MidiBusControlsBaseUnselected");
 131         }
 132
 133         /* map current state of the route */
 134
 135         processors_changed ();
 136
 137         ensure_xml_node ();
 138
 139         set_state (*xml_node, Stateful::loading_state_version);
 140
 141         _route->processors_changed.connect (mem_fun(*this, &MidiTimeAxisView::processors_changed));
 142
 143         if (is_track()) {
 144                 _piano_roll_header = new PianoRollHeader(*midi_view());
 145                 _range_scroomer = new MidiScroomer(midi_view()->note_range_adjustment);
 146
 147                 controls_hbox.pack_start(*_range_scroomer);
 148                 controls_hbox.pack_start(*_piano_roll_header);
 149
 150                 controls_ebox.set_name ("MidiTrackControlsBaseUnselected");
 151                 controls_base_selected_name = "MidiTrackControlsBaseSelected";
 152                 controls_base_unselected_name = "MidiTrackControlsBaseUnselected";
 153
 154                 midi_view()->NoteRangeChanged.connect (mem_fun(*this, &MidiTimeAxisView::update_range));
 155
 156                 /* ask for notifications of any new RegionViews */
 157                 _view->RegionViewAdded.connect (mem_fun(*this, &MidiTimeAxisView::region_view_added));
 158                 _view->attach ();
 159         }
 160
 161         HBox* midi_controls_hbox = manage(new HBox());
 162
 163         MIDI::Name::MidiPatchManager& patch_manager = MIDI::Name::MidiPatchManager::instance();
 164
 165         MIDI::Name::MasterDeviceNames::Models::const_iterator m = patch_manager.all_models().begin();
 166         for (; m != patch_manager.all_models().end(); ++m) {
 167                 _model_selector.append_text(m->c_str());
 168         }
 169
 170         _model_selector.signal_changed().connect(mem_fun(*this, &MidiTimeAxisView::model_changed));
 171
 172         _custom_device_mode_selector.signal_changed().connect(
 173                         mem_fun(*this, &MidiTimeAxisView::custom_device_mode_changed));
 174
 175         // TODO: persist the choice
 176         // this initializes the comboboxes and sends out the signal
 177         _model_selector.set_active(0);
 178
 179         midi_controls_hbox->pack_start(_channel_selector, true, false);
 180         if (!patch_manager.all_models().empty()) {
 181                 _midi_controls_box.pack_start(_model_selector, true, false);
 182                 _midi_controls_box.pack_start(_custom_device_mode_selector, true, false);
 183         }
 184
 185         _midi_controls_box.pack_start(*midi_controls_hbox, true, true);
 186
 187         controls_vbox.pack_start(_midi_controls_box, false, false);
 188
 189         boost::shared_ptr<MidiDiskstream> diskstream = midi_track()->midi_diskstream();
 190
 191         // restore channel selector settings
 192         _channel_selector.set_channel_mode(diskstream->get_channel_mode(),
 193                         diskstream->get_channel_mask());
 194         _channel_selector.mode_changed.connect(
 195                 mem_fun(*midi_track()->midi_diskstream(), &MidiDiskstream::set_channel_mode));
 196
 197         XMLProperty *prop;
 198         if ((prop = xml_node->property ("color-mode")) != 0) {
 199                 _color_mode = ColorMode (string_2_enum(prop->value(), _color_mode));
 200                 if (_color_mode == ChannelColors) {
 201                         _channel_selector.set_channel_colors(CanvasNoteEvent::midi_channel_colors);
 202                 }
 203         }
 204
 205         if ((prop = xml_node->property ("note-mode")) != 0) {
 206                 _note_mode = NoteMode (string_2_enum(prop->value(), _note_mode));
 207                 if (_percussion_mode_item) {
 208                         _percussion_mode_item->set_active (_note_mode == Percussive);
 209                 }
 210         }
 211 }
 212
 213 MidiTimeAxisView::~MidiTimeAxisView ()
 214 {
 215         delete _piano_roll_header;
 216         _piano_roll_header = 0;
 217
 218         delete _range_scroomer;
 219         _range_scroomer = 0;
 220 }
 221
 222 void MidiTimeAxisView::model_changed()
 223 {
 224         std::list<std::string> device_modes = MIDI::Name::MidiPatchManager::instance()
 225                 .custom_device_mode_names_by_model(_model_selector.get_active_text());
 226
 227         _custom_device_mode_selector.clear_items();
 228
 229         for (std::list<std::string>::const_iterator i = device_modes.begin();
 230                         i != device_modes.end(); ++i) {
 231                 cerr << "found custom device mode " << *i << " thread_id: " << pthread_self() << endl;
 232                 _custom_device_mode_selector.append_text(*i);
 233         }
 234
 235         _custom_device_mode_selector.set_active(0);
 236 }
 237
 238 void MidiTimeAxisView::custom_device_mode_changed()
 239 {
 240         _midi_patch_settings_changed.emit(_model_selector.get_active_text(),
 241                         _custom_device_mode_selector.get_active_text());
 242 }
 243
 244 MidiStreamView*
 245 MidiTimeAxisView::midi_view()
 246 {
 247         return dynamic_cast<MidiStreamView*>(_view);
 248 }
 249
 250 guint32
 251 MidiTimeAxisView::show_at (double y, int& nth, Gtk::VBox *parent)
 252 {
 253         ensure_xml_node ();
 254         xml_node->add_property ("shown-editor", "yes");
 255
 256         guint32 ret = TimeAxisView::show_at (y, nth, parent);
 257         return ret;
 258 }
 259
 260 void
 261 MidiTimeAxisView::hide ()
 262 {
 263         ensure_xml_node ();
 264         xml_node->add_property ("shown-editor", "no");
 265
 266         TimeAxisView::hide ();
 267 }
 268
 269 void
 270 MidiTimeAxisView::set_height (uint32_t h)
 271 {
 272         RouteTimeAxisView::set_height (h);
 273
 274         if (height >= MIDI_CONTROLS_BOX_MIN_HEIGHT) {
 275                 _midi_controls_box.show();
 276         } else {
 277                 _midi_controls_box.hide();
 278         }
 279
 280         if (height >= KEYBOARD_MIN_HEIGHT) {
 281                 if (is_track() && _range_scroomer)
 282                         _range_scroomer->show();
 283                 if (is_track() && _piano_roll_header)
 284                         _piano_roll_header->show();
 285         } else {
 286                 if (is_track() && _range_scroomer)
 287                         _range_scroomer->hide();
 288                 if (is_track() && _piano_roll_header)
 289                         _piano_roll_header->hide();
 290         }
 291 }
 292
 293 void
 294 MidiTimeAxisView::append_extra_display_menu_items ()
 295 {
 296         using namespace Menu_Helpers;
 297
 298         MenuList& items = display_menu->items();
 299
 300         // Note range
 301         Menu *range_menu = manage(new Menu);
 302         MenuList& range_items = range_menu->items();
 303         range_menu->set_name ("ArdourContextMenu");
 304
 305         range_items.push_back (MenuElem (_("Show Full Range"), bind (
 306                         mem_fun(*this, &MidiTimeAxisView::set_note_range),
 307                         MidiStreamView::FullRange)));
 308
 309         range_items.push_back (MenuElem (_("Fit Contents"), bind (
 310                         mem_fun(*this, &MidiTimeAxisView::set_note_range),
 311                         MidiStreamView::ContentsRange)));
 312
 313         items.push_back (MenuElem (_("Note range"), *range_menu));
 314         items.push_back (MenuElem (_("Note mode"), *build_note_mode_menu()));
 315         items.push_back (MenuElem (_("Default Channel"), *build_def_channel_menu()));
 316
 317         items.push_back (CheckMenuElem (_("MIDI Thru"), mem_fun(*this, &MidiTimeAxisView::toggle_midi_thru)));
 318         _midi_thru_item = dynamic_cast<CheckMenuItem*>(&items.back());
 319 }
 320
 321 Gtk::Menu*
 322 MidiTimeAxisView::build_def_channel_menu ()
 323 {
 324         using namespace Menu_Helpers;
 325
 326         if (default_channel_menu == 0) {
 327                 default_channel_menu = manage (new Menu ());
 328         }
 329
 330         uint8_t defchn = midi_track()->default_channel();
 331         MenuList& def_channel_items = default_channel_menu->items();
 332         RadioMenuItem* item;
 333         RadioMenuItem::Group dc_group;
 334
 335         for (int i = 0; i < 16; ++i) {
 336                 char buf[4];
 337                 snprintf (buf, sizeof (buf), "%d", i+1);
 338
 339                 def_channel_items.push_back (RadioMenuElem (dc_group, buf,
 340                                                             bind (mem_fun (*this, &MidiTimeAxisView::set_default_channel), i)));
 341                 item = dynamic_cast<RadioMenuItem*>(&def_channel_items.back());
 342                 item->set_active ((i == defchn));
 343         }
 344
 345         return default_channel_menu;
 346 }
 347
 348 void
 349 MidiTimeAxisView::set_default_channel (int chn)
 350 {
 351         midi_track()->set_default_channel (chn);
 352 }
 353
 354 void
 355 MidiTimeAxisView::toggle_midi_thru ()
 356 {
 357         if (!_midi_thru_item) {
 358                 return;
 359         }
 360
 361         bool view_yn = _midi_thru_item->get_active();
 362         if (view_yn != midi_track()->midi_thru()) {
 363                 midi_track()->set_midi_thru (view_yn);
 364         }
 365 }
 366
 367 void
 368 MidiTimeAxisView::build_automation_action_menu ()
 369 {
 370         using namespace Menu_Helpers;
 371
 372         RouteTimeAxisView::build_automation_action_menu ();
 373
 374         MenuList& automation_items = automation_action_menu->items();
 375
 376         automation_items.push_back (SeparatorElem());
 377         automation_items.push_back (MenuElem (_("Controller..."),
 378                         mem_fun(*this, &MidiTimeAxisView::add_cc_track)));
 379         automation_items.push_back (MenuElem (_("Program Change"),
 380                         sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 381                                 Evoral::Parameter(MidiPgmChangeAutomation))));
 382         automation_items.push_back (MenuElem (_("Bender"),
 383                         sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 384                                 Evoral::Parameter(MidiPitchBenderAutomation))));
 385         automation_items.push_back (MenuElem (_("Pressure"),
 386                         sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
 387                                 Evoral::Parameter(MidiChannelPressureAutomation))));
 388 }
 389
 390 Gtk::Menu*
 391 MidiTimeAxisView::build_note_mode_menu()
 392 {
 393         using namespace Menu_Helpers;
 394
 395         Menu* mode_menu = manage (new Menu);
 396         MenuList& items = mode_menu->items();
 397         mode_menu->set_name ("ArdourContextMenu");
 398
 399         RadioMenuItem::Group mode_group;
 400         items.push_back (RadioMenuElem (mode_group, _("Sustained"),
 401                                 bind (mem_fun (*this, &MidiTimeAxisView::set_note_mode), Sustained)));
 402         _note_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 403         _note_mode_item->set_active(_note_mode == Sustained);
 404
 405         items.push_back (RadioMenuElem (mode_group, _("Percussive"),
 406                                 bind (mem_fun (*this, &MidiTimeAxisView::set_note_mode), Percussive)));
 407         _percussion_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 408         _percussion_mode_item->set_active(_note_mode == Percussive);
 409
 410         return mode_menu;
 411 }
 412
 413 Gtk::Menu*
 414 MidiTimeAxisView::build_color_mode_menu()
 415 {
 416         using namespace Menu_Helpers;
 417
 418         Menu* mode_menu = manage (new Menu);
 419         MenuList& items = mode_menu->items();
 420         mode_menu->set_name ("ArdourContextMenu");
 421
 422         RadioMenuItem::Group mode_group;
 423         items.push_back (RadioMenuElem (mode_group, _("Meter Colors"),
 424                                 bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), MeterColors)));
 425         _meter_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 426         _meter_color_mode_item->set_active(_color_mode == MeterColors);
 427
 428         items.push_back (RadioMenuElem (mode_group, _("Channel Colors"),
 429                                 bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), ChannelColors)));
 430         _channel_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 431         _channel_color_mode_item->set_active(_color_mode == ChannelColors);
 432
 433         items.push_back (RadioMenuElem (mode_group, _("Track Color"),
 434                                 bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), TrackColor)));
 435         _channel_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
 436         _channel_color_mode_item->set_active(_color_mode == TrackColor);
 437
 438         return mode_menu;
 439 }
 440
 441 void
 442 MidiTimeAxisView::set_note_mode(NoteMode mode)
 443 {
 444         if (_note_mode != mode || midi_track()->note_mode() != mode) {
 445                 _note_mode = mode;
 446                 midi_track()->set_note_mode(mode);
 447                 xml_node->add_property ("note-mode", enum_2_string(_note_mode));
 448                 _view->redisplay_diskstream();
 449         }
 450 }
 451
 452 void
 453 MidiTimeAxisView::set_color_mode(ColorMode mode)
 454 {
 455         if (_color_mode != mode) {
 456                 if (mode == ChannelColors) {
 457                         _channel_selector.set_channel_colors(CanvasNoteEvent::midi_channel_colors);
 458                 } else {
 459                         _channel_selector.set_default_channel_color();
 460                 }
 461
 462                 _color_mode = mode;
 463                 xml_node->add_property ("color-mode", enum_2_string(_color_mode));
 464                 _view->redisplay_diskstream();
 465         }
 466 }
 467
 468 void
 469 MidiTimeAxisView::set_note_range(MidiStreamView::VisibleNoteRange range)
 470 {
 471         if (!_ignore_signals)
 472                 midi_view()->set_note_range(range);
 473 }
 474
 475
 476 void
 477 MidiTimeAxisView::update_range()
 478 {
 479         MidiGhostRegion* mgr;
 480
 481         for(list<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
 482                 if ((mgr = dynamic_cast<MidiGhostRegion*>(*i)) != 0) {
 483                         mgr->update_range();
 484                 }
 485         }
 486 }
 487
 488 void
 489 MidiTimeAxisView::show_all_automation ()
 490 {
 491         if (midi_track()) {
 492                 const set<Evoral::Parameter> params = midi_track()->midi_diskstream()->
 493                                 midi_playlist()->contained_automation();
 494
 495                 for (set<Evoral::Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
 496                         create_automation_child(*i, true);
 497                 }
 498         }
 499
 500         RouteTimeAxisView::show_all_automation ();
 501 }
 502
 503 void
 504 MidiTimeAxisView::show_existing_automation ()
 505 {
 506         if (midi_track()) {
 507                 const set<Evoral::Parameter> params = midi_track()->midi_diskstream()->
 508                                 midi_playlist()->contained_automation();
 509
 510                 for (set<Evoral::Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
 511                         create_automation_child(*i, true);
 512                 }
 513         }
 514
 515         RouteTimeAxisView::show_existing_automation ();
 516 }
 517
 518 /** Prompt for a controller with a dialog and add an automation track for it
 519  */
 520 void
 521 MidiTimeAxisView::add_cc_track()
 522 {
 523         int response;
 524         Evoral::Parameter param(0, 0, 0);
 525
 526         {
 527                 AddMidiCCTrackDialog dialog;
 528                 dialog.set_transient_for (_editor);
 529                 response = dialog.run();
 530
 531                 if (response == Gtk::RESPONSE_ACCEPT)
 532                         param = dialog.parameter();
 533         }
 534
 535         if (param.type() != 0 && response == Gtk::RESPONSE_ACCEPT)
 536                 create_automation_child(param, true);
 537 }
 538
 539
 540 /** Add an automation track for the given parameter (pitch bend, channel pressure).
 541  */
 542 void
 543 MidiTimeAxisView::add_parameter_track(const Evoral::Parameter& param)
 544 {
 545         if ( !EventTypeMap::instance().is_midi_parameter(param) ) {
 546                 error << "MidiTimeAxisView: unknown automation child "
 547                         << ARDOUR::EventTypeMap::instance().to_symbol(param) << endmsg;
 548                 return;
 549         }
 550
 551         // create the parameter lane for each selected channel
 552         uint16_t selected_channels = _channel_selector.get_selected_channels();
 553
 554         for (uint8_t i = 0; i < 16; i++) {
 555                 if (selected_channels & (0x0001 << i)) {
 556                         Evoral::Parameter param_with_channel(param.type(), i, param.id());
 557                         create_automation_child(param_with_channel, true);
 558                 }
 559         }
 560 }
 561
 562 void
 563 MidiTimeAxisView::create_automation_child (const Evoral::Parameter& param, bool show)
 564 {
 565         /* These controllers are region "automation", so we do not create
 566          * an AutomationList/Line for the track */
 567
 568         if (param.type() == NullAutomation) {
 569                 cerr << "WARNING: Attempt to create NullAutomation child, ignoring" << endl;
 570                 return;
 571         }
 572
 573         AutomationTracks::iterator existing = _automation_tracks.find(param);
 574         if (existing != _automation_tracks.end())
 575                 return;
 576
 577         boost::shared_ptr<AutomationControl> c = _route->get_control (param);
 578
 579         assert(c);
 580
 581         boost::shared_ptr<AutomationTimeAxisView> track(new AutomationTimeAxisView (_session,
 582                         _route, boost::shared_ptr<ARDOUR::Automatable>(), c,
 583                         _editor,
 584                         *this,
 585                         true,
 586                         parent_canvas,
 587                         _route->describe_parameter(param)));
 588
 589         add_automation_child(param, track, show);
 590 }
 591
 592
 593 void
 594 MidiTimeAxisView::route_active_changed ()
 595 {
 596         RouteUI::route_active_changed ();
 597
 598         if (is_track()) {
 599                 if (_route->active()) {
 600                         controls_ebox.set_name ("MidiTrackControlsBaseUnselected");
 601                         controls_base_selected_name = "MidiTrackControlsBaseSelected";
 602                         controls_base_unselected_name = "MidiTrackControlsBaseUnselected";
 603                 } else {
 604                         controls_ebox.set_name ("MidiTrackControlsBaseInactiveUnselected");
 605                         controls_base_selected_name = "MidiTrackControlsBaseInactiveSelected";
 606                         controls_base_unselected_name = "MidiTrackControlsBaseInactiveUnselected";
 607                 }
 608         } else {
 609
 610                 throw; // wha?
 611
 612                 if (_route->active()) {
 613                         controls_ebox.set_name ("BusControlsBaseUnselected");
 614                         controls_base_selected_name = "BusControlsBaseSelected";
 615                         controls_base_unselected_name = "BusControlsBaseUnselected";
 616                 } else {
 617                         controls_ebox.set_name ("BusControlsBaseInactiveUnselected");
 618                         controls_base_selected_name = "BusControlsBaseInactiveSelected";
 619                         controls_base_unselected_name = "BusControlsBaseInactiveUnselected";
 620                 }
 621         }
 622 }
 623
 624 void
 625 MidiTimeAxisView::start_step_editing ()
 626 {
 627         step_edit_insert_position = _editor.get_preferred_edit_position ();
 628         step_edit_beat_pos = 0;
 629         step_edit_region = playlist()->top_region_at (step_edit_insert_position);
 630
 631         if (step_edit_region) {
 632                 RegionView* rv = view()->find_view (step_edit_region);
 633                 step_edit_region_view = dynamic_cast<MidiRegionView*> (rv);
 634         } else {
 635                 step_edit_region_view = 0;
 636         }
 637
 638         midi_track()->set_step_editing (true);
 639 }
 640
 641 void
 642 MidiTimeAxisView::stop_step_editing ()
 643 {
 644         midi_track()->set_step_editing (false);
 645 }
 646
 647 void
 648 MidiTimeAxisView::check_step_edit ()
 649 {
 650         MidiRingBuffer<nframes_t>& incoming (midi_track()->step_edit_ring_buffer());
 651         Evoral::Note<Evoral::MusicalTime> note;
 652         uint8_t* buf;
 653         uint32_t bufsize = 32;
 654
 655         buf = new uint8_t[bufsize];
 656
 657         while (incoming.read_space()) {
 658                 nframes_t time;
 659                 Evoral::EventType type;
 660                 uint32_t size;
 661
 662                 incoming.read_prefix (&time, &type, &size);
 663
 664                 if (size > bufsize) {
 665                         delete [] buf;
 666                         bufsize = size;
 667                         buf = new uint8_t[bufsize];
 668                 }
 669
 670                 incoming.read_contents (size, buf);
 671
 672                 if ((buf[0] & 0xf0) == MIDI_CMD_NOTE_ON) {
 673
 674                         if (step_edit_region == 0) {
 675
 676                                 step_edit_region = add_region (step_edit_insert_position);
 677                                 RegionView* rv = view()->find_view (step_edit_region);
 678
 679                                 if (rv) {
 680                                         step_edit_region_view = dynamic_cast<MidiRegionView*>(rv);
 681                                 } else {
 682                                         fatal << X_("programming error: no view found for new MIDI region") << endmsg;
 683                                         /*NOTREACHED*/
 684                                 }
 685                         }
 686
 687                         if (step_edit_region_view) {
 688
 689                                 bool success;
 690                                 Evoral::MusicalTime beats = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
 691
 692                                 if (!success) {
 693                                         continue;
 694                                 }
 695
 696                                 step_edit_region_view->add_note (buf[0] & 0xf, buf[1], buf[2], step_edit_beat_pos, beats);
 697                                 step_edit_beat_pos += beats;
 698                         }
 699                 }
 700
 701         }
 702 }
 703
 704 void
 705 MidiTimeAxisView::step_edit_rest ()
 706 {
 707         bool success;
 708         Evoral::MusicalTime beats = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
 709         step_edit_beat_pos += beats;
 710 }
 711
 712 boost::shared_ptr<Region>
 713 MidiTimeAxisView::add_region (nframes64_t pos)
 714 {
 715         Editor* real_editor = dynamic_cast<Editor*> (&_editor);
 716
 717         real_editor->begin_reversible_command (_("create region"));
 718         XMLNode &before = playlist()->get_state();
 719
 720         nframes64_t start = pos;
 721         real_editor->snap_to (start, -1);
 722         const Meter& m = _session.tempo_map().meter_at(start);
 723         const Tempo& t = _session.tempo_map().tempo_at(start);
 724         double length = floor (m.frames_per_bar(t, _session.frame_rate()));
 725
 726         const boost::shared_ptr<MidiDiskstream> diskstream =
 727                 boost::dynamic_pointer_cast<MidiDiskstream>(view()->trackview().track()->diskstream());
 728
 729         boost::shared_ptr<Source> src = _session.create_midi_source_for_session (*diskstream.get());
 730
 731         boost::shared_ptr<Region> region = (RegionFactory::create (src, 0, (nframes_t) length,
 732                                                                    PBD::basename_nosuffix(src->name())));
 733
 734         playlist()->add_region (region, start);
 735         XMLNode &after = playlist()->get_state();
 736         _session.add_command (new MementoCommand<Playlist> (*playlist().get(), &before, &after));
 737
 738         real_editor->commit_reversible_command();
 739
 740         return region;
 741 }