gtk2_ardour/midi_streamview.cc

   1 /*
   2     Copyright (C) 2001-2007 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 <cmath>
  20 #include <cassert>
  21 #include <utility>
  22
  23 #include <gtkmm.h>
  24
  25 #include <gtkmm2ext/gtk_ui.h>
  26
  27 #include <ardour/midi_playlist.h>
  28 #include <ardour/midi_region.h>
  29 #include <ardour/midi_source.h>
  30 #include <ardour/midi_diskstream.h>
  31 #include <ardour/midi_track.h>
  32 #include <ardour/smf_source.h>
  33 #include <ardour/region_factory.h>
  34
  35 #include "midi_streamview.h"
  36 #include "region_view.h"
  37 #include "midi_region_view.h"
  38 #include "midi_time_axis.h"
  39 #include "canvas-simplerect.h"
  40 #include "region_selection.h"
  41 #include "selection.h"
  42 #include "public_editor.h"
  43 #include "ardour_ui.h"
  44 #include "rgb_macros.h"
  45 #include "gui_thread.h"
  46 #include "utils.h"
  47 #include "simplerect.h"
  48 #include "lineset.h"
  49
  50 using namespace std;
  51 using namespace ARDOUR;
  52 using namespace PBD;
  53 using namespace Editing;
  54
  55 MidiStreamView::MidiStreamView (MidiTimeAxisView& tv)
  56         : StreamView (tv)
  57         , note_range_adjustment(0.0f, 0.0f, 0.0f)
  58         , _range_dirty(false)
  59         , _range_sum_cache(-1.0)
  60         , _lowest_note(60)
  61         , _highest_note(71)
  62         , _data_note_min(60)
  63         , _data_note_max(71)
  64 {
  65         if (tv.is_track())
  66                 stream_base_color = ARDOUR_UI::config()->canvasvar_MidiTrackBase.get();
  67         else
  68                 stream_base_color = ARDOUR_UI::config()->canvasvar_MidiBusBase.get();
  69
  70         use_rec_regions = tv.editor().show_waveforms_recording ();
  71
  72         /* use a group dedicated to MIDI underlays. Audio underlays are not in this group. */
  73         midi_underlay_group = new ArdourCanvas::Group (*canvas_group);
  74         midi_underlay_group->lower_to_bottom();
  75
  76         /* put the note lines in the timeaxisview's group, so it
  77            can be put below ghost regions from MIDI underlays*/
  78         _note_lines = new ArdourCanvas::LineSet(*canvas_group, ArdourCanvas::LineSet::Horizontal);
  79
  80         _note_lines->property_x1() = 0;
  81         _note_lines->property_y1() = 0;
  82         _note_lines->property_x2() = trackview().editor().frame_to_pixel (max_frames);
  83         _note_lines->property_y2() = 0;
  84
  85         _note_lines->signal_event().connect (bind (mem_fun (_trackview.editor(), &PublicEditor::canvas_stream_view_event), _note_lines, &_trackview));
  86         _note_lines->lower_to_bottom();
  87
  88         ColorsChanged.connect(mem_fun(*this, &MidiStreamView::draw_note_lines));
  89
  90         note_range_adjustment.set_page_size(_highest_note - _lowest_note);
  91         note_range_adjustment.set_value(_lowest_note);
  92
  93         note_range_adjustment.signal_value_changed().connect (mem_fun (*this, &MidiStreamView::note_range_adjustment_changed));
  94 }
  95
  96 MidiStreamView::~MidiStreamView ()
  97 {
  98 }
  99
 100 static void
 101 veto_note_range(uint8_t& min, uint8_t& max)
 102 {
 103         /* Legal notes, thanks */
 104         if (max > 127)
 105                 max = 127;
 106         if (min > 127)
 107                 min = 127;
 108
 109         /* Always display at least one octave in [0, 127] */
 110         if (max == 127) {
 111                 if (min > (127 - 11)) {
 112                         min = 127 - 11;
 113                 }
 114         } else if (max < min + 11) {
 115                 uint8_t d = 11 - (max - min);
 116                 if (max + d/2 > 127) {
 117                         min -= d;
 118                 } else {
 119                         min -= d / 2;
 120                         max += d / 2;
 121                 }
 122         }
 123         assert(max - min >= 11);
 124         assert(max < 127);
 125         assert(min < 127);
 126 }
 127
 128 RegionView*
 129 MidiStreamView::add_region_view_internal (boost::shared_ptr<Region> r, bool wfd, bool recording)
 130 {
 131         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion> (r);
 132
 133         if (region == 0) {
 134                 return NULL;
 135         }
 136
 137         MidiRegionView *region_view;
 138         list<RegionView *>::iterator i;
 139
 140         for (i = region_views.begin(); i != region_views.end(); ++i) {
 141                 if ((*i)->region() == r) {
 142
 143                         /* great. we already have a MidiRegionView for this Region. use it again. */
 144
 145                         (*i)->set_valid (true);
 146
 147                         display_region(dynamic_cast<MidiRegionView*>(*i), wfd);
 148
 149                         return NULL;
 150                 }
 151         }
 152
 153         region_view = new MidiRegionView (canvas_group, _trackview, region,
 154                         _samples_per_unit, region_color);
 155
 156         region_view->init (region_color, false);
 157         region_views.push_front (region_view);
 158
 159         /* display events and find note range */
 160         display_region(region_view, wfd);
 161
 162         /* catch regionview going away */
 163         region->GoingAway.connect (bind (mem_fun (*this, &MidiStreamView::remove_region_view), region));
 164
 165         RegionViewAdded (region_view);
 166
 167         return region_view;
 168 }
 169
 170 void
 171 MidiStreamView::display_region(MidiRegionView* region_view, bool load_model)
 172 {
 173         if ( ! region_view)
 174                 return;
 175
 176         region_view->enable_display(true);
 177
 178         boost::shared_ptr<MidiSource> source(region_view->midi_region()->midi_source(0));
 179
 180         if (load_model) {
 181                 source->load_model();
 182         }
 183
 184         _range_dirty = update_data_note_range(
 185                         source->model()->lowest_note(),
 186                         source->model()->highest_note());
 187
 188         // Display region contents
 189         region_view->display_model(source->model());
 190 }
 191
 192 void
 193 MidiStreamView::display_diskstream (boost::shared_ptr<Diskstream> ds)
 194 {
 195         StreamView::display_diskstream(ds);
 196         draw_note_lines();
 197         NoteRangeChanged();
 198 }
 199
 200 bool
 201 MidiStreamView::update_data_note_range(uint8_t min, uint8_t max)
 202 {
 203         bool dirty = false;
 204         if (min < _data_note_min) {
 205                 _data_note_min = min;
 206                 dirty = true;
 207         }
 208         if (max > _data_note_max) {
 209                 _data_note_max = max;
 210                 dirty = true;
 211         }
 212         return dirty;
 213 }
 214
 215 // FIXME: code duplication with AudioStreamView
 216 void
 217 MidiStreamView::redisplay_diskstream ()
 218 {
 219         list<RegionView *>::iterator i, tmp;
 220
 221         _range_dirty = false;
 222         _data_note_min = 127;
 223         _data_note_max = 0;
 224
 225         for (i = region_views.begin(); i != region_views.end(); ++i) {
 226                 (*i)->set_valid (false);
 227                 (*i)->enable_display (false);
 228
 229                 // Load model if it isn't already, to get note range
 230                 MidiRegionView* mrv = dynamic_cast<MidiRegionView*>(*i);
 231                 if (mrv) {
 232                         mrv->midi_region()->midi_source(0)->load_model();
 233                         _range_dirty = update_data_note_range(
 234                                         mrv->midi_region()->model()->lowest_note(),
 235                                         mrv->midi_region()->model()->highest_note());
 236                 }
 237         }
 238
 239         // No notes, use default range
 240         if (!_range_dirty) {
 241                 _data_note_min = 60;
 242                 _data_note_max = 71;
 243         }
 244
 245         bool range_changed = false;
 246
 247         // Extend visible range to show newly recorded data, if necessary
 248         if (_data_note_min < _lowest_note) {
 249                 _lowest_note = _data_note_min;
 250                 range_changed = true;
 251         }
 252         if (_data_note_max > _highest_note) {
 253                 _highest_note = _data_note_max;
 254                 range_changed = true;
 255         }
 256
 257         veto_note_range(_lowest_note, _highest_note);
 258
 259         if (_trackview.is_midi_track()) {
 260                 _trackview.get_diskstream()->playlist()->foreach_region (
 261                                 static_cast<StreamView*>(this), &StreamView::add_region_view);
 262         }
 263
 264         RegionViewList copy;
 265
 266         /* Place regions */
 267         for (i = region_views.begin(); i != region_views.end(); ) {
 268                 tmp = i;
 269                 tmp++;
 270
 271                 if (!(*i)->is_valid()) {
 272                         delete *i;
 273                         region_views.erase (i);
 274                         i = tmp;
 275                         continue;
 276                 } else {
 277                         (*i)->enable_display(true);
 278                         (*i)->set_height(height); // apply note range
 279                 }
 280
 281                 /* Sort regionviews by layer so that when we call region_layered ()
 282                    the canvas layering works out (in non-stacked mode). */
 283
 284                 if (copy.size() == 0) {
 285                         copy.push_front((*i));
 286                         i = tmp;
 287                         continue;
 288                 }
 289
 290                 RegionViewList::iterator k = copy.begin();
 291                 RegionViewList::iterator l = copy.end();
 292                 l--;
 293
 294                 if ((*i)->region()->layer() <= (*k)->region()->layer()) {
 295                         copy.push_front((*i));
 296                         i = tmp;
 297                         continue;
 298                 } else if ((*i)->region()->layer() >= (*l)->region()->layer()) {
 299                         copy.push_back((*i));
 300                         i = tmp;
 301                         continue;
 302                 }
 303
 304                 for (RegionViewList::iterator j = copy.begin(); j != copy.end(); ++j) {
 305                         if ((*j)->region()->layer() >= (*i)->region()->layer()) {
 306                                 copy.insert(j, (*i));
 307                                 break;
 308                         }
 309                 }
 310
 311                 i = tmp;
 312         }
 313
 314         /* Fix canvas layering */
 315         for (RegionViewList::iterator j = copy.begin(); j != copy.end(); ++j) {
 316                 region_layered (*j);
 317         }
 318
 319         /* Update note range and re-draw note lines if necessary */
 320         apply_note_range(_lowest_note, _highest_note);
 321         NoteRangeChanged();
 322 }
 323
 324
 325 void
 326 MidiStreamView::update_contents_height ()
 327 {
 328         StreamView::update_contents_height();
 329         _note_lines->property_y2() = height;
 330         draw_note_lines();
 331 }
 332
 333 void
 334 MidiStreamView::draw_note_lines()
 335 {
 336         double y;
 337         double prev_y = contents_height();
 338         uint32_t color;
 339
 340         _note_lines->clear();
 341
 342         for (int i = lowest_note(); i <= highest_note(); ++i) {
 343                 y = floor(note_to_y(i));
 344
 345                 _note_lines->add_line(prev_y, 1.0, ARDOUR_UI::config()->canvasvar_PianoRollBlackOutline.get());
 346
 347                 switch (i % 12) {
 348                 case 1:
 349                 case 3:
 350                 case 6:
 351                 case 8:
 352                 case 10:
 353                         color = ARDOUR_UI::config()->canvasvar_PianoRollBlack.get();
 354                         break;
 355                 default:
 356                         color = ARDOUR_UI::config()->canvasvar_PianoRollWhite.get();
 357                         break;
 358                 }
 359
 360                 if (i == highest_note()) {
 361                         _note_lines->add_line(y, prev_y - y, color);
 362                 } else {
 363                         _note_lines->add_line(y + 1.0, prev_y - y - 1.0, color);
 364                 }
 365
 366                 prev_y = y;
 367         }
 368 }
 369
 370 void
 371 MidiStreamView::set_note_range(VisibleNoteRange r)
 372 {
 373         if (r == FullRange) {
 374                 _lowest_note = 0;
 375                 _highest_note = 127;
 376         } else {
 377                 _lowest_note = _data_note_min;
 378                 _highest_note = _data_note_max;
 379         }
 380
 381         apply_note_range(_lowest_note, _highest_note);
 382 }
 383
 384 void
 385 MidiStreamView::apply_note_range(uint8_t lowest, uint8_t highest)
 386 {
 387         _highest_note = highest;
 388         _lowest_note = lowest;
 389         note_range_adjustment.set_page_size(_highest_note - _lowest_note);
 390         note_range_adjustment.set_value(_lowest_note);
 391         draw_note_lines();
 392
 393         for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 394                 ((MidiRegionView*)(*i))->apply_note_range(lowest, highest);
 395         }
 396
 397         NoteRangeChanged();
 398 }
 399
 400 void
 401 MidiStreamView::update_note_range(uint8_t note_num)
 402 {
 403         assert(note_num <= 127);
 404         _data_note_min = min(_data_note_min, note_num);
 405         _data_note_max = max(_data_note_max, note_num);
 406 }
 407
 408 void
 409 MidiStreamView::setup_rec_box ()
 410 {
 411         // cerr << _trackview.name() << " streamview SRB\n";
 412
 413         if (_trackview.session().transport_rolling()) {
 414
 415                 if (!rec_active &&
 416                     _trackview.session().record_status() == Session::Recording &&
 417                     _trackview.get_diskstream()->record_enabled()) {
 418
 419                         if (use_rec_regions && rec_regions.size() == rec_rects.size()) {
 420
 421                                 /* add a new region, but don't bother if they set use_rec_regions mid-record */
 422
 423                                 MidiRegion::SourceList sources;
 424
 425                                 for (list<sigc::connection>::iterator prc = rec_data_ready_connections.begin(); prc != rec_data_ready_connections.end(); ++prc) {
 426                                         (*prc).disconnect();
 427                                 }
 428                                 rec_data_ready_connections.clear();
 429
 430                                 // FIXME
 431                                 boost::shared_ptr<MidiDiskstream> mds = boost::dynamic_pointer_cast<MidiDiskstream>(_trackview.get_diskstream());
 432                                 assert(mds);
 433
 434                                 sources.push_back(mds->write_source());
 435
 436                                 rec_data_ready_connections.push_back (mds->write_source()->ViewDataRangeReady.connect (bind (mem_fun (*this, &MidiStreamView::rec_data_range_ready), boost::weak_ptr<Source>(mds->write_source()))));
 437
 438                                 // handle multi
 439
 440                                 jack_nframes_t start = 0;
 441                                 if (rec_regions.size() > 0) {
 442                                         start = rec_regions.back().first->position() + _trackview.get_diskstream()->get_captured_frames(rec_regions.size()-1);
 443                                 }
 444
 445                                 boost::shared_ptr<MidiRegion> region (boost::dynamic_pointer_cast<MidiRegion>
 446                                         (RegionFactory::create (sources, start, 1 , "", 0, (Region::Flag)(Region::DefaultFlags | Region::DoNotSaveState), false)));
 447                                 assert(region);
 448                                 region->set_position (_trackview.session().transport_frame(), this);
 449                                 rec_regions.push_back (make_pair(region, (RegionView*)0));
 450
 451                                 // rec regions are destroyed in setup_rec_box
 452
 453                                 /* we add the region later */
 454                         }
 455
 456                         /* start a new rec box */
 457
 458                         boost::shared_ptr<MidiTrack> mt = _trackview.midi_track(); /* we know what it is already */
 459                         boost::shared_ptr<MidiDiskstream> ds = mt->midi_diskstream();
 460                         jack_nframes_t frame_pos = ds->current_capture_start ();
 461                         gdouble xstart = _trackview.editor().frame_to_pixel (frame_pos);
 462                         gdouble xend;
 463                         uint32_t fill_color;
 464
 465                         assert(_trackview.midi_track()->mode() == Normal);
 466
 467                         xend = xstart;
 468                         fill_color = ARDOUR_UI::config()->canvasvar_RecordingRect.get();
 469
 470                         ArdourCanvas::SimpleRect * rec_rect = new Gnome::Canvas::SimpleRect (*canvas_group);
 471                         rec_rect->property_x1() = xstart;
 472                         rec_rect->property_y1() = 1.0;
 473                         rec_rect->property_x2() = xend;
 474                         rec_rect->property_y2() = (double) _trackview.current_height() - 1;
 475                         rec_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RecordingRect.get();
 476                         rec_rect->property_fill_color_rgba() = fill_color;
 477                         rec_rect->lower_to_bottom();
 478
 479                         RecBoxInfo recbox;
 480                         recbox.rectangle = rec_rect;
 481                         recbox.start = _trackview.session().transport_frame();
 482                         recbox.length = 0;
 483
 484                         rec_rects.push_back (recbox);
 485
 486                         screen_update_connection.disconnect();
 487                         screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (mem_fun (*this, &MidiStreamView::update_rec_box));
 488                         rec_updating = true;
 489                         rec_active = true;
 490
 491                 } else if (rec_active &&
 492                            (_trackview.session().record_status() != Session::Recording ||
 493                             !_trackview.get_diskstream()->record_enabled())) {
 494
 495                         screen_update_connection.disconnect();
 496                         rec_active = false;
 497                         rec_updating = false;
 498
 499                 }
 500
 501         } else {
 502
 503                 // cerr << "\tNOT rolling, rec_rects = " << rec_rects.size() << " rec_regions = " << rec_regions.size() << endl;
 504
 505                 if (!rec_rects.empty() || !rec_regions.empty()) {
 506
 507                         /* disconnect rapid update */
 508                         screen_update_connection.disconnect();
 509
 510                         for (list<sigc::connection>::iterator prc = rec_data_ready_connections.begin(); prc != rec_data_ready_connections.end(); ++prc) {
 511                                 (*prc).disconnect();
 512                         }
 513                         rec_data_ready_connections.clear();
 514
 515                         rec_updating = false;
 516                         rec_active = false;
 517
 518                         /* remove temp regions */
 519
 520                         for (list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator iter = rec_regions.begin(); iter != rec_regions.end();) {
 521                                 list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator tmp;
 522
 523                                 tmp = iter;
 524                                 ++tmp;
 525
 526                                 (*iter).first->drop_references ();
 527
 528                                 iter = tmp;
 529                         }
 530
 531                         rec_regions.clear();
 532
 533                         // cerr << "\tclear " << rec_rects.size() << " rec rects\n";
 534
 535                         /* transport stopped, clear boxes */
 536                         for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
 537                                 RecBoxInfo &rect = (*iter);
 538                                 delete rect.rectangle;
 539                         }
 540
 541                         rec_rects.clear();
 542
 543                 }
 544         }
 545 }
 546
 547 void
 548 MidiStreamView::update_rec_regions (boost::shared_ptr<MidiModel> data, nframes_t start, nframes_t dur)
 549 {
 550         ENSURE_GUI_THREAD (bind (mem_fun (*this, &MidiStreamView::update_rec_regions), data, start, dur));
 551
 552         if (use_rec_regions) {
 553
 554                 uint32_t n = 0;
 555                 bool     update_range = false;
 556
 557                 for (list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); n++) {
 558
 559                         list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator tmp;
 560
 561                         tmp = iter;
 562                         ++tmp;
 563
 564                         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion>(iter->first);
 565                         if (!region || !iter->second) {
 566                                 iter = tmp;
 567                                 continue;
 568                         }
 569
 570                         if (!canvas_item_visible (rec_rects[n].rectangle)) {
 571                                 /* rect already hidden, this region is done */
 572                                 iter = tmp;
 573                                 continue;
 574                         }
 575
 576                         nframes_t origlen = region->length();
 577
 578                         if (region == rec_regions.back().first && rec_active) {
 579
 580                                 if (start >= region->midi_source(0)->timeline_position()) {
 581
 582                                         nframes_t nlen = start + dur - region->position();
 583
 584                                         if (nlen != region->length()) {
 585
 586                                                 region->freeze ();
 587                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 588                                                 region->set_length (start + dur - region->position(), this);
 589                                                 region->thaw ("updated");
 590
 591                                                 if (origlen == 1) {
 592                                                         /* our special initial length */
 593                                                         iter->second = add_region_view_internal (region, false);
 594                                                         ((MidiRegionView*)iter->second)->begin_write();
 595                                                 }
 596
 597                                                 /* also update rect */
 598                                                 ArdourCanvas::SimpleRect * rect = rec_rects[n].rectangle;
 599                                                 gdouble xend = _trackview.editor().frame_to_pixel (region->position() + region->length());
 600                                                 rect->property_x2() = xend;
 601
 602                                                 /* draw events */
 603                                                 MidiRegionView* mrv = (MidiRegionView*)iter->second;
 604                                                 for (size_t i=0; i < data->n_notes(); ++i) {
 605
 606                                                         // FIXME: slooooooooow!
 607
 608                                                         const boost::shared_ptr<Evoral::Note> note = data->note_at(i);
 609
 610                                                         if (note->length() > 0 && note->end_time() + region->position() > start)
 611                                                                 mrv->resolve_note(note->note(), note->end_time());
 612
 613                                                         if (note->time() + region->position() < start)
 614                                                                 continue;
 615
 616                                                         if (note->time() + region->position() > start + dur)
 617                                                                 break;
 618
 619                                                         mrv->add_note(note);
 620
 621                                                         if (note->note() < _lowest_note) {
 622                                                                 _lowest_note = note->note();
 623                                                                 update_range = true;
 624                                                         } else if (note->note() > _highest_note) {
 625                                                                 _highest_note = note->note();
 626                                                                 update_range = true;
 627                                                         }
 628                                                 }
 629
 630                                                 mrv->extend_active_notes();
 631                                         }
 632                                 }
 633
 634                         } else {
 635
 636                                 nframes_t nlen = _trackview.get_diskstream()->get_captured_frames(n);
 637
 638                                 if (nlen != region->length()) {
 639
 640                                         if (region->source(0)->length() >= region->position() + nlen) {
 641
 642                                                 region->freeze ();
 643                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 644                                                 region->set_length (nlen, this);
 645                                                 region->thaw ("updated");
 646
 647                                                 if (origlen == 1) {
 648                                                         /* our special initial length */
 649                                                         iter->second = add_region_view_internal (region, false);
 650                                                 }
 651
 652                                                 /* also hide rect */
 653                                                 ArdourCanvas::Item * rect = rec_rects[n].rectangle;
 654                                                 rect->hide();
 655
 656                                         }
 657                                 }
 658                         }
 659
 660                         iter = tmp;
 661                 }
 662
 663                 if (update_range)
 664                         update_contents_height();
 665         }
 666 }
 667
 668 void
 669 MidiStreamView::rec_data_range_ready (jack_nframes_t start, jack_nframes_t dur, boost::weak_ptr<Source> weak_src)
 670 {
 671         // this is called from the butler thread for now
 672
 673         ENSURE_GUI_THREAD(bind (mem_fun (*this, &MidiStreamView::rec_data_range_ready), start, dur, weak_src));
 674
 675         boost::shared_ptr<SMFSource> src (boost::dynamic_pointer_cast<SMFSource>(weak_src.lock()));
 676
 677         this->update_rec_regions (src->model(), start, dur);
 678 }
 679
 680 void
 681 MidiStreamView::color_handler ()
 682 {
 683         //case cMidiTrackBase:
 684         if (_trackview.is_midi_track()) {
 685                 //canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiTrackBase.get();
 686         }
 687
 688         //case cMidiBusBase:
 689         if (!_trackview.is_midi_track()) {
 690                 //canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiBusBase.get();;
 691         }
 692 }
 693
 694 void
 695 MidiStreamView::note_range_adjustment_changed()
 696 {
 697         double sum = note_range_adjustment.get_value() + note_range_adjustment.get_page_size();
 698         int lowest = (int) floor(note_range_adjustment.get_value());
 699         int highest;
 700
 701         if (sum == _range_sum_cache) {
 702                 //cerr << "cached" << endl;
 703                 highest = (int) floor(sum);
 704         } else {
 705                 //cerr << "recalc" << endl;
 706                 highest = lowest + (int) floor(note_range_adjustment.get_page_size());
 707                 _range_sum_cache = sum;
 708         }
 709
 710         if (lowest == _lowest_note && highest == _highest_note) {
 711                 return;
 712         }
 713
 714         //cerr << "note range adjustment changed: " << lowest << " " << highest << endl;
 715         //cerr << "  val=" << v_zoom_adjustment.get_value() << " page=" << v_zoom_adjustment.get_page_size() << " sum=" << v_zoom_adjustment.get_value() + v_zoom_adjustment.get_page_size() << endl;
 716
 717         _lowest_note = lowest;
 718         _highest_note = highest;
 719         apply_note_range(lowest, highest);
 720 }
 721