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_diskstream.h>
  28 #include <ardour/midi_playlist.h>
  29 #include <ardour/midi_region.h>
  30 #include <ardour/midi_source.h>
  31 #include <ardour/midi_track.h>
  32 #include <ardour/region_factory.h>
  33 #include <ardour/smf_source.h>
  34
  35 #include "ardour_ui.h"
  36 #include "canvas-simplerect.h"
  37 #include "gui_thread.h"
  38 #include "lineset.h"
  39 #include "midi_region_view.h"
  40 #include "midi_streamview.h"
  41 #include "midi_time_axis.h"
  42 #include "midi_util.h"
  43 #include "public_editor.h"
  44 #include "region_selection.h"
  45 #include "region_view.h"
  46 #include "rgb_macros.h"
  47 #include "selection.h"
  48 #include "simplerect.h"
  49 #include "utils.h"
  50
  51 using namespace std;
  52 using namespace ARDOUR;
  53 using namespace PBD;
  54 using namespace Editing;
  55
  56 MidiStreamView::MidiStreamView (MidiTimeAxisView& tv)
  57         : StreamView (tv)
  58         , note_range_adjustment(0.0f, 0.0f, 0.0f)
  59         , _range_dirty(false)
  60         , _range_sum_cache(-1.0)
  61         , _lowest_note(60)
  62         , _highest_note(71)
  63         , _data_note_min(60)
  64         , _data_note_max(71)
  65 {
  66         if (tv.is_track()) {
  67                 stream_base_color = ARDOUR_UI::config()->canvasvar_MidiTrackBase.get();
  68         } else {
  69                 stream_base_color = ARDOUR_UI::config()->canvasvar_MidiBusBase.get();
  70         }
  71
  72         use_rec_regions = tv.editor().show_waveforms_recording ();
  73
  74         /* use a group dedicated to MIDI underlays. Audio underlays are not in this group. */
  75         midi_underlay_group = new ArdourCanvas::Group (*canvas_group);
  76         midi_underlay_group->lower_to_bottom();
  77
  78         /* put the note lines in the timeaxisview's group, so it
  79            can be put below ghost regions from MIDI underlays*/
  80         _note_lines = new ArdourCanvas::LineSet(*canvas_group, ArdourCanvas::LineSet::Horizontal);
  81
  82         _note_lines->property_x1() = 0;
  83         _note_lines->property_y1() = 0;
  84         _note_lines->property_x2() = trackview().editor().frame_to_pixel (max_frames);
  85         _note_lines->property_y2() = 0;
  86
  87         _note_lines->signal_event().connect(bind(
  88                         mem_fun(_trackview.editor(), &PublicEditor::canvas_stream_view_event),
  89                         _note_lines, &_trackview));
  90
  91         _note_lines->lower_to_bottom();
  92
  93         ColorsChanged.connect(mem_fun(*this, &MidiStreamView::draw_note_lines));
  94
  95         note_range_adjustment.set_page_size(_highest_note - _lowest_note);
  96         note_range_adjustment.set_value(_lowest_note);
  97
  98         note_range_adjustment.signal_value_changed().connect(
  99                         mem_fun(*this, &MidiStreamView::note_range_adjustment_changed));
 100 }
 101
 102 MidiStreamView::~MidiStreamView ()
 103 {
 104 }
 105
 106 static void
 107 veto_note_range(uint8_t& min, uint8_t& max)
 108 {
 109         /* Legal notes, thanks */
 110         clamp_to_0_127(min);
 111         clamp_to_0_127(max);
 112
 113         /* Always display at least one octave in [0, 127] */
 114         if (max == 127) {
 115                 if (min > (127 - 11)) {
 116                         min = 127 - 11;
 117                 }
 118         } else if (max < min + 11) {
 119                 uint8_t d = 11 - (max - min);
 120                 if (max + d/2 > 127) {
 121                         min -= d;
 122                 } else {
 123                         min -= d / 2;
 124                         max += d / 2;
 125                 }
 126         }
 127         assert(max - min >= 11);
 128         assert(max < 127);
 129         assert(min < 127);
 130 }
 131
 132 RegionView*
 133 MidiStreamView::add_region_view_internal (boost::shared_ptr<Region> r, bool wfd, bool recording)
 134 {
 135         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion> (r);
 136
 137         if (region == 0) {
 138                 return NULL;
 139         }
 140
 141         MidiRegionView *region_view;
 142         list<RegionView *>::iterator i;
 143
 144         for (i = region_views.begin(); i != region_views.end(); ++i) {
 145                 if ((*i)->region() == r) {
 146
 147                         /* great. we already have a MidiRegionView for this Region. use it again. */
 148
 149                         (*i)->set_valid (true);
 150
 151                         display_region(dynamic_cast<MidiRegionView*>(*i), wfd);
 152
 153                         return NULL;
 154                 }
 155         }
 156
 157         region_view = new MidiRegionView (canvas_group, _trackview, region,
 158                         _samples_per_unit, region_color);
 159
 160         region_view->init (region_color, false);
 161         region_views.push_front (region_view);
 162
 163         /* display events and find note range */
 164         display_region(region_view, wfd);
 165
 166         /* catch regionview going away */
 167         region->GoingAway.connect (bind (mem_fun (*this, &MidiStreamView::remove_region_view), region));
 168
 169         RegionViewAdded (region_view);
 170
 171         return region_view;
 172 }
 173
 174 void
 175 MidiStreamView::display_region(MidiRegionView* region_view, bool load_model)
 176 {
 177         if ( ! region_view)
 178                 return;
 179
 180         region_view->enable_display(true);
 181
 182         boost::shared_ptr<MidiSource> source(region_view->midi_region()->midi_source(0));
 183
 184         if (load_model) {
 185                 source->load_model();
 186         }
 187
 188         _range_dirty = update_data_note_range(
 189                         source->model()->lowest_note(),
 190                         source->model()->highest_note());
 191
 192         // Display region contents
 193         region_view->set_height(height);
 194         region_view->display_model(source->model());
 195 }
 196
 197 void
 198 MidiStreamView::display_diskstream (boost::shared_ptr<Diskstream> ds)
 199 {
 200         StreamView::display_diskstream(ds);
 201         draw_note_lines();
 202         NoteRangeChanged();
 203 }
 204
 205 void
 206 MidiStreamView::update_contents_metrics(boost::shared_ptr<Region> r)
 207 {
 208         boost::shared_ptr<MidiRegion> mr = boost::dynamic_pointer_cast<MidiRegion>(r);
 209         if (mr) {
 210                 mr->midi_source(0)->load_model();
 211                 _range_dirty = update_data_note_range(
 212                                 mr->model()->lowest_note(),
 213                                 mr->model()->highest_note());
 214         }
 215 }
 216
 217 bool
 218 MidiStreamView::update_data_note_range(uint8_t min, uint8_t max)
 219 {
 220         bool dirty = false;
 221         if (min < _data_note_min) {
 222                 _data_note_min = min;
 223                 dirty = true;
 224         }
 225         if (max > _data_note_max) {
 226                 _data_note_max = max;
 227                 dirty = true;
 228         }
 229         return dirty;
 230 }
 231
 232 void
 233 MidiStreamView::redisplay_diskstream ()
 234 {
 235         if (!_trackview.is_midi_track()) {
 236                 return;
 237         }
 238
 239         list<RegionView*>::iterator i, tmp;
 240
 241         // Load models if necessary, and find note range of all our contents
 242         _range_dirty = false;
 243         _data_note_min = 127;
 244         _data_note_max = 0;
 245         _trackview.get_diskstream()->playlist()->foreach_region(
 246                         static_cast<StreamView*>(this),
 247                         &StreamView::update_contents_metrics);
 248
 249         // No notes, use default range
 250         if (!_range_dirty) {
 251                 _data_note_min = 60;
 252                 _data_note_max = 71;
 253         }
 254
 255         // Extend visible range to show newly recorded data, if necessary
 256         _lowest_note  = std::min(_lowest_note, _data_note_min);
 257         _highest_note = std::max(_highest_note, _data_note_max);
 258
 259         veto_note_range(_lowest_note, _highest_note);
 260
 261         // Flag region views as invalid and disable drawing
 262         for (i = region_views.begin(); i != region_views.end(); ++i) {
 263                 (*i)->set_valid(false);
 264                 (*i)->enable_display(false);
 265         }
 266
 267         // Add and display region views, and flag existing ones as valid
 268         _trackview.get_diskstream()->playlist()->foreach_region(
 269                         static_cast<StreamView*>(this),
 270                         &StreamView::add_region_view);
 271
 272         // Build a list of region views sorted by layer, and remove invalids
 273         RegionViewList copy;
 274         for (i = region_views.begin(); i != region_views.end(); ) {
 275                 tmp = i;
 276                 tmp++;
 277
 278                 if (!(*i)->is_valid()) {
 279                         delete *i;
 280                         region_views.erase (i);
 281                         i = tmp;
 282                         continue;
 283                 }
 284
 285                 if (copy.size() == 0) {
 286                         copy.push_front((*i));
 287                         i = tmp;
 288                         continue;
 289                 }
 290
 291                 RegionViewList::iterator k = copy.begin();
 292                 RegionViewList::iterator l = copy.end();
 293                 l--;
 294
 295                 if ((*i)->region()->layer() <= (*k)->region()->layer()) {
 296                         copy.push_front((*i));
 297                         i = tmp;
 298                         continue;
 299                 } else if ((*i)->region()->layer() >= (*l)->region()->layer()) {
 300                         copy.push_back((*i));
 301                         i = tmp;
 302                         continue;
 303                 }
 304
 305                 for (RegionViewList::iterator j = copy.begin(); j != copy.end(); ++j) {
 306                         if ((*j)->region()->layer() >= (*i)->region()->layer()) {
 307                                 copy.insert(j, (*i));
 308                                 break;
 309                         }
 310                 }
 311
 312                 i = tmp;
 313         }
 314
 315         // Fix canvas layering by raising each in the sorted list order
 316         for (RegionViewList::iterator j = copy.begin(); j != copy.end(); ++j) {
 317                 region_layered (*j);
 318         }
 319
 320         // Update note range (not to regions which are already good) and draw note lines
 321         apply_note_range(_lowest_note, _highest_note, false);
 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, true);
 382 }
 383
 384 void
 385 MidiStreamView::apply_note_range(uint8_t lowest, uint8_t highest, bool to_region_views)
 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         if (to_region_views) {
 394                 for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 395                         ((MidiRegionView*)(*i))->apply_note_range(lowest, highest);
 396                 }
 397         }
 398
 399         NoteRangeChanged();
 400 }
 401
 402 void
 403 MidiStreamView::update_note_range(uint8_t note_num)
 404 {
 405         assert(note_num <= 127);
 406         _data_note_min = min(_data_note_min, note_num);
 407         _data_note_max = max(_data_note_max, note_num);
 408 }
 409
 410 void
 411 MidiStreamView::setup_rec_box ()
 412 {
 413         // cerr << _trackview.name() << " streamview SRB\n";
 414
 415         if (_trackview.session().transport_rolling()) {
 416
 417                 if (!rec_active &&
 418                     _trackview.session().record_status() == Session::Recording &&
 419                     _trackview.get_diskstream()->record_enabled()) {
 420
 421                         if (use_rec_regions && rec_regions.size() == rec_rects.size()) {
 422
 423                                 /* add a new region, but don't bother if they set use_rec_regions mid-record */
 424
 425                                 MidiRegion::SourceList sources;
 426
 427                                 for (list<sigc::connection>::iterator prc = rec_data_ready_connections.begin(); prc != rec_data_ready_connections.end(); ++prc) {
 428                                         (*prc).disconnect();
 429                                 }
 430                                 rec_data_ready_connections.clear();
 431
 432                                 // FIXME
 433                                 boost::shared_ptr<MidiDiskstream> mds = boost::dynamic_pointer_cast<MidiDiskstream>(_trackview.get_diskstream());
 434                                 assert(mds);
 435
 436                                 sources.push_back(mds->write_source());
 437
 438                                 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()))));
 439
 440                                 // handle multi
 441
 442                                 jack_nframes_t start = 0;
 443                                 if (rec_regions.size() > 0) {
 444                                         start = rec_regions.back().first->position() + _trackview.get_diskstream()->get_captured_frames(rec_regions.size()-1);
 445                                 }
 446
 447                                 boost::shared_ptr<MidiRegion> region (boost::dynamic_pointer_cast<MidiRegion>
 448                                         (RegionFactory::create (sources, start, 1 , "", 0, (Region::Flag)(Region::DefaultFlags | Region::DoNotSaveState), false)));
 449                                 assert(region);
 450                                 region->set_position (_trackview.session().transport_frame(), this);
 451                                 rec_regions.push_back (make_pair(region, (RegionView*)0));
 452
 453                                 // rec regions are destroyed in setup_rec_box
 454
 455                                 /* we add the region later */
 456                         }
 457
 458                         /* start a new rec box */
 459
 460                         boost::shared_ptr<MidiTrack> mt = _trackview.midi_track(); /* we know what it is already */
 461                         boost::shared_ptr<MidiDiskstream> ds = mt->midi_diskstream();
 462                         jack_nframes_t frame_pos = ds->current_capture_start ();
 463                         gdouble xstart = _trackview.editor().frame_to_pixel (frame_pos);
 464                         gdouble xend;
 465                         uint32_t fill_color;
 466
 467                         assert(_trackview.midi_track()->mode() == Normal);
 468
 469                         xend = xstart;
 470                         fill_color = ARDOUR_UI::config()->canvasvar_RecordingRect.get();
 471
 472                         ArdourCanvas::SimpleRect * rec_rect = new Gnome::Canvas::SimpleRect (*canvas_group);
 473                         rec_rect->property_x1() = xstart;
 474                         rec_rect->property_y1() = 1.0;
 475                         rec_rect->property_x2() = xend;
 476                         rec_rect->property_y2() = (double) _trackview.current_height() - 1;
 477                         rec_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RecordingRect.get();
 478                         rec_rect->property_fill_color_rgba() = fill_color;
 479                         rec_rect->lower_to_bottom();
 480
 481                         RecBoxInfo recbox;
 482                         recbox.rectangle = rec_rect;
 483                         recbox.start = _trackview.session().transport_frame();
 484                         recbox.length = 0;
 485
 486                         rec_rects.push_back (recbox);
 487
 488                         screen_update_connection.disconnect();
 489                         screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (mem_fun (*this, &MidiStreamView::update_rec_box));
 490                         rec_updating = true;
 491                         rec_active = true;
 492
 493                 } else if (rec_active &&
 494                            (_trackview.session().record_status() != Session::Recording ||
 495                             !_trackview.get_diskstream()->record_enabled())) {
 496
 497                         screen_update_connection.disconnect();
 498                         rec_active = false;
 499                         rec_updating = false;
 500
 501                 }
 502
 503         } else {
 504
 505                 // cerr << "\tNOT rolling, rec_rects = " << rec_rects.size() << " rec_regions = " << rec_regions.size() << endl;
 506
 507                 if (!rec_rects.empty() || !rec_regions.empty()) {
 508
 509                         /* disconnect rapid update */
 510                         screen_update_connection.disconnect();
 511
 512                         for (list<sigc::connection>::iterator prc = rec_data_ready_connections.begin(); prc != rec_data_ready_connections.end(); ++prc) {
 513                                 (*prc).disconnect();
 514                         }
 515                         rec_data_ready_connections.clear();
 516
 517                         rec_updating = false;
 518                         rec_active = false;
 519
 520                         /* remove temp regions */
 521
 522                         for (list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator iter = rec_regions.begin(); iter != rec_regions.end();) {
 523                                 list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator tmp;
 524
 525                                 tmp = iter;
 526                                 ++tmp;
 527
 528                                 (*iter).first->drop_references ();
 529
 530                                 iter = tmp;
 531                         }
 532
 533                         rec_regions.clear();
 534
 535                         // cerr << "\tclear " << rec_rects.size() << " rec rects\n";
 536
 537                         /* transport stopped, clear boxes */
 538                         for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
 539                                 RecBoxInfo &rect = (*iter);
 540                                 delete rect.rectangle;
 541                         }
 542
 543                         rec_rects.clear();
 544
 545                 }
 546         }
 547 }
 548
 549 void
 550 MidiStreamView::update_rec_regions (boost::shared_ptr<MidiModel> data, nframes_t start, nframes_t dur)
 551 {
 552         ENSURE_GUI_THREAD (bind (mem_fun (*this, &MidiStreamView::update_rec_regions), data, start, dur));
 553
 554         if (use_rec_regions) {
 555
 556                 uint32_t n = 0;
 557                 bool     update_range = false;
 558
 559                 for (list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); n++) {
 560
 561                         list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator tmp;
 562
 563                         tmp = iter;
 564                         ++tmp;
 565
 566                         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion>(iter->first);
 567                         if (!region || !iter->second) {
 568                                 iter = tmp;
 569                                 continue;
 570                         }
 571
 572                         if (!canvas_item_visible (rec_rects[n].rectangle)) {
 573                                 /* rect already hidden, this region is done */
 574                                 iter = tmp;
 575                                 continue;
 576                         }
 577
 578                         nframes_t origlen = region->length();
 579
 580                         if (region == rec_regions.back().first && rec_active) {
 581
 582                                 if (start >= region->midi_source(0)->timeline_position()) {
 583
 584                                         nframes_t nlen = start + dur - region->position();
 585
 586                                         if (nlen != region->length()) {
 587
 588                                                 region->freeze ();
 589                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 590                                                 region->set_length (start + dur - region->position(), this);
 591                                                 region->thaw ("updated");
 592
 593                                                 if (origlen == 1) {
 594                                                         /* our special initial length */
 595                                                         iter->second = add_region_view_internal (region, false);
 596                                                         ((MidiRegionView*)iter->second)->begin_write();
 597                                                 }
 598
 599                                                 /* also update rect */
 600                                                 ArdourCanvas::SimpleRect * rect = rec_rects[n].rectangle;
 601                                                 gdouble xend = _trackview.editor().frame_to_pixel (region->position() + region->length());
 602                                                 rect->property_x2() = xend;
 603
 604                                                 /* draw events */
 605                                                 MidiRegionView* mrv = (MidiRegionView*)iter->second;
 606                                                 for (size_t i=0; i < data->n_notes(); ++i) {
 607
 608                                                         // FIXME: slooooooooow!
 609
 610                                                         const boost::shared_ptr<MidiRegionView::NoteType> note = data->note_at(i);
 611
 612                                                         if (note->length() > 0 && note->end_time() + region->position() > start)
 613                                                                 mrv->resolve_note(note->note(), note->end_time());
 614
 615                                                         if (note->time() + region->position() < start)
 616                                                                 continue;
 617
 618                                                         if (note->time() + region->position() > start + dur)
 619                                                                 break;
 620
 621                                                         mrv->add_note(note);
 622
 623                                                         if (note->note() < _lowest_note) {
 624                                                                 _lowest_note = note->note();
 625                                                                 update_range = true;
 626                                                         } else if (note->note() > _highest_note) {
 627                                                                 _highest_note = note->note();
 628                                                                 update_range = true;
 629                                                         }
 630                                                 }
 631
 632                                                 mrv->extend_active_notes();
 633                                         }
 634                                 }
 635
 636                         } else {
 637
 638                                 nframes_t nlen = _trackview.get_diskstream()->get_captured_frames(n);
 639
 640                                 if (nlen != region->length()) {
 641
 642                                         if (region->source(0)->length() >= region->position() + nlen) {
 643
 644                                                 region->freeze ();
 645                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 646                                                 region->set_length (nlen, this);
 647                                                 region->thaw ("updated");
 648
 649                                                 if (origlen == 1) {
 650                                                         /* our special initial length */
 651                                                         iter->second = add_region_view_internal (region, false);
 652                                                 }
 653
 654                                                 /* also hide rect */
 655                                                 ArdourCanvas::Item * rect = rec_rects[n].rectangle;
 656                                                 rect->hide();
 657
 658                                         }
 659                                 }
 660                         }
 661
 662                         iter = tmp;
 663                 }
 664
 665                 if (update_range)
 666                         update_contents_height();
 667         }
 668 }
 669
 670 void
 671 MidiStreamView::rec_data_range_ready (jack_nframes_t start, jack_nframes_t dur, boost::weak_ptr<Source> weak_src)
 672 {
 673         // this is called from the butler thread for now
 674
 675         ENSURE_GUI_THREAD(bind (mem_fun (*this, &MidiStreamView::rec_data_range_ready), start, dur, weak_src));
 676
 677         boost::shared_ptr<SMFSource> src (boost::dynamic_pointer_cast<SMFSource>(weak_src.lock()));
 678
 679         this->update_rec_regions (src->model(), start, dur);
 680 }
 681
 682 void
 683 MidiStreamView::color_handler ()
 684 {
 685         //case cMidiTrackBase:
 686         if (_trackview.is_midi_track()) {
 687                 //canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiTrackBase.get();
 688         }
 689
 690         //case cMidiBusBase:
 691         if (!_trackview.is_midi_track()) {
 692                 //canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiBusBase.get();;
 693         }
 694 }
 695
 696 void
 697 MidiStreamView::note_range_adjustment_changed()
 698 {
 699         double sum = note_range_adjustment.get_value() + note_range_adjustment.get_page_size();
 700         int lowest = (int) floor(note_range_adjustment.get_value());
 701         int highest;
 702
 703         if (sum == _range_sum_cache) {
 704                 //cerr << "cached" << endl;
 705                 highest = (int) floor(sum);
 706         } else {
 707                 //cerr << "recalc" << endl;
 708                 highest = lowest + (int) floor(note_range_adjustment.get_page_size());
 709                 _range_sum_cache = sum;
 710         }
 711
 712         if (lowest == _lowest_note && highest == _highest_note) {
 713                 return;
 714         }
 715
 716         //cerr << "note range adjustment changed: " << lowest << " " << highest << endl;
 717         //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;
 718
 719         _lowest_note = lowest;
 720         _highest_note = highest;
 721         apply_note_range(lowest, highest, true);
 722 }
 723