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 #include "ardour/session.h"
  35
  36 #include "ardour_ui.h"
  37 #include "canvas-simplerect.h"
  38 #include "gui_thread.h"
  39 #include "lineset.h"
  40 #include "midi_region_view.h"
  41 #include "midi_streamview.h"
  42 #include "midi_time_axis.h"
  43 #include "midi_util.h"
  44 #include "public_editor.h"
  45 #include "region_selection.h"
  46 #include "region_view.h"
  47 #include "rgb_macros.h"
  48 #include "selection.h"
  49 #include "simplerect.h"
  50 #include "utils.h"
  51
  52 using namespace std;
  53 using namespace ARDOUR;
  54 using namespace PBD;
  55 using namespace Editing;
  56
  57 MidiStreamView::MidiStreamView (MidiTimeAxisView& tv)
  58         : StreamView (tv)
  59         , note_range_adjustment(0.0f, 0.0f, 0.0f)
  60         , _range_dirty(false)
  61         , _range_sum_cache(-1.0)
  62         , _lowest_note(60)
  63         , _highest_note(71)
  64         , _data_note_min(60)
  65         , _data_note_max(71)
  66 {
  67         if (tv.is_track()) {
  68                 stream_base_color = ARDOUR_UI::config()->canvasvar_MidiTrackBase.get();
  69         } else {
  70                 stream_base_color = ARDOUR_UI::config()->canvasvar_MidiBusBase.get();
  71         }
  72
  73         use_rec_regions = tv.editor().show_waveforms_recording ();
  74
  75         /* use a group dedicated to MIDI underlays. Audio underlays are not in this group. */
  76         midi_underlay_group = new ArdourCanvas::Group (*canvas_group);
  77         midi_underlay_group->lower_to_bottom();
  78
  79         /* put the note lines in the timeaxisview's group, so it
  80            can be put below ghost regions from MIDI underlays*/
  81         _note_lines = new ArdourCanvas::LineSet(*canvas_group, ArdourCanvas::LineSet::Horizontal);
  82
  83         _note_lines->property_x1() = 0;
  84         _note_lines->property_y1() = 0;
  85         _note_lines->property_x2() = trackview().editor().frame_to_pixel (max_frames);
  86         _note_lines->property_y2() = 0;
  87
  88         _note_lines->signal_event().connect(sigc::bind(
  89                         sigc::mem_fun(_trackview.editor(), &PublicEditor::canvas_stream_view_event),
  90                         _note_lines, &_trackview));
  91
  92         _note_lines->lower_to_bottom();
  93
  94         ColorsChanged.connect(sigc::mem_fun(*this, &MidiStreamView::draw_note_lines));
  95
  96         note_range_adjustment.set_page_size(_highest_note - _lowest_note);
  97         note_range_adjustment.set_value(_lowest_note);
  98
  99         note_range_adjustment.signal_value_changed().connect(
 100                         sigc::mem_fun(*this, &MidiStreamView::note_range_adjustment_changed));
 101 }
 102
 103 MidiStreamView::~MidiStreamView ()
 104 {
 105 }
 106
 107 static void
 108 veto_note_range(uint8_t& min, uint8_t& max)
 109 {
 110         /* Legal notes, thanks */
 111         clamp_to_0_127(min);
 112         clamp_to_0_127(max);
 113
 114         /* Always display at least one octave in [0, 127] */
 115         if (max == 127) {
 116                 if (min > (127 - 11)) {
 117                         min = 127 - 11;
 118                 }
 119         } else if (max < min + 11) {
 120                 uint8_t d = 11 - (max - min);
 121                 if (max + d/2 > 127) {
 122                         min -= d;
 123                 } else {
 124                         min -= d / 2;
 125                         max += d / 2;
 126                 }
 127         }
 128         assert(max - min >= 11);
 129         assert(max <= 127);
 130         assert(min <= 127);
 131 }
 132
 133 RegionView*
 134 MidiStreamView::create_region_view (boost::shared_ptr<Region> r, bool /*wfd*/, bool)
 135 {
 136         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion> (r);
 137
 138         if (region == 0) {
 139                 return 0;
 140         }
 141
 142         RegionView* region_view = new MidiRegionView (canvas_group, _trackview, region,
 143                                                       _samples_per_unit, region_color);
 144
 145         region_view->init (region_color, false);
 146
 147         return region_view;
 148 }
 149
 150 RegionView*
 151 MidiStreamView::add_region_view_internal (boost::shared_ptr<Region> r, bool wfd, bool recording)
 152 {
 153         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion> (r);
 154
 155         if (region == 0) {
 156                 return 0;
 157         }
 158
 159         for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 160                 if ((*i)->region() == r) {
 161
 162                         /* great. we already have a MidiRegionView for this Region. use it again. */
 163
 164                         (*i)->set_valid (true);
 165
 166                         display_region(dynamic_cast<MidiRegionView*>(*i), wfd);
 167
 168                         return 0;
 169                 }
 170         }
 171
 172         MidiRegionView* region_view = dynamic_cast<MidiRegionView*> (create_region_view (r, wfd, recording));
 173         if (region_view == 0) {
 174                 return 0;
 175         }
 176
 177         region_views.push_front (region_view);
 178
 179         /* display events and find note range */
 180         display_region (region_view, wfd);
 181
 182         /* catch regionview going away */
 183         region->DropReferences.connect (*this, boost::bind (&MidiStreamView::remove_region_view, this, region), gui_context());
 184
 185         RegionViewAdded (region_view);
 186
 187         return region_view;
 188 }
 189
 190 void
 191 MidiStreamView::display_region(MidiRegionView* region_view, bool load_model)
 192 {
 193         if ( ! region_view)
 194                 return;
 195
 196         region_view->enable_display(true);
 197
 198         boost::shared_ptr<MidiSource> source(region_view->midi_region()->midi_source(0));
 199
 200         if (load_model) {
 201                 source->load_model();
 202         }
 203
 204         _range_dirty = update_data_note_range(
 205                         source->model()->lowest_note(),
 206                         source->model()->highest_note());
 207
 208         // Display region contents
 209         region_view->set_height(height);
 210         region_view->display_model(source->model());
 211 }
 212
 213 void
 214 MidiStreamView::display_diskstream (boost::shared_ptr<Diskstream> ds)
 215 {
 216         StreamView::display_diskstream(ds);
 217         draw_note_lines();
 218         NoteRangeChanged();
 219 }
 220
 221 void
 222 MidiStreamView::update_contents_metrics(boost::shared_ptr<Region> r)
 223 {
 224         boost::shared_ptr<MidiRegion> mr = boost::dynamic_pointer_cast<MidiRegion>(r);
 225         if (mr) {
 226                 mr->midi_source(0)->load_model();
 227                 _range_dirty = update_data_note_range(
 228                                 mr->model()->lowest_note(),
 229                                 mr->model()->highest_note());
 230         }
 231 }
 232
 233 bool
 234 MidiStreamView::update_data_note_range(uint8_t min, uint8_t max)
 235 {
 236         bool dirty = false;
 237         if (min < _data_note_min) {
 238                 _data_note_min = min;
 239                 dirty = true;
 240         }
 241         if (max > _data_note_max) {
 242                 _data_note_max = max;
 243                 dirty = true;
 244         }
 245         return dirty;
 246 }
 247
 248 void
 249 MidiStreamView::redisplay_diskstream ()
 250 {
 251         if (!_trackview.is_midi_track()) {
 252                 return;
 253         }
 254
 255         list<RegionView*>::iterator i;
 256
 257         // Load models if necessary, and find note range of all our contents
 258         _range_dirty = false;
 259         _data_note_min = 127;
 260         _data_note_max = 0;
 261         _trackview.get_diskstream()->playlist()->foreach_region(
 262                 sigc::mem_fun (*this, &StreamView::update_contents_metrics)
 263                 );
 264
 265         // No notes, use default range
 266         if (!_range_dirty) {
 267                 _data_note_min = 60;
 268                 _data_note_max = 71;
 269         }
 270
 271         // Extend visible range to show newly recorded data, if necessary
 272         _lowest_note  = std::min(_lowest_note, _data_note_min);
 273         _highest_note = std::max(_highest_note, _data_note_max);
 274
 275         veto_note_range(_lowest_note, _highest_note);
 276
 277         // Flag region views as invalid and disable drawing
 278         for (i = region_views.begin(); i != region_views.end(); ++i) {
 279                 (*i)->set_valid(false);
 280                 (*i)->enable_display(false);
 281         }
 282
 283         // Add and display region views, and flag them as valid
 284         _trackview.get_diskstream()->playlist()->foreach_region(
 285                 sigc::hide_return (sigc::mem_fun (*this, &StreamView::add_region_view))
 286                 );
 287
 288         // Stack regions by layer, and remove invalid regions
 289         layer_regions();
 290
 291         // Update note range (not regions which are correct) and draw note lines
 292         apply_note_range(_lowest_note, _highest_note, false);
 293 }
 294
 295
 296 void
 297 MidiStreamView::update_contents_height ()
 298 {
 299         StreamView::update_contents_height();
 300         _note_lines->property_y2() = height;
 301         draw_note_lines();
 302 }
 303
 304 void
 305 MidiStreamView::draw_note_lines()
 306 {
 307         double y;
 308         double prev_y = contents_height();
 309         uint32_t color;
 310
 311         _note_lines->clear();
 312
 313         for (int i = lowest_note(); i <= highest_note(); ++i) {
 314                 y = floor(note_to_y(i));
 315
 316                 _note_lines->add_line(prev_y, 1.0, ARDOUR_UI::config()->canvasvar_PianoRollBlackOutline.get());
 317
 318                 switch (i % 12) {
 319                 case 1:
 320                 case 3:
 321                 case 6:
 322                 case 8:
 323                 case 10:
 324                         color = ARDOUR_UI::config()->canvasvar_PianoRollBlack.get();
 325                         break;
 326                 default:
 327                         color = ARDOUR_UI::config()->canvasvar_PianoRollWhite.get();
 328                         break;
 329                 }
 330
 331                 if (i == highest_note()) {
 332                         _note_lines->add_line(y, prev_y - y, color);
 333                 } else {
 334                         _note_lines->add_line(y + 1.0, prev_y - y - 1.0, color);
 335                 }
 336
 337                 prev_y = y;
 338         }
 339 }
 340
 341 void
 342 MidiStreamView::set_note_range(VisibleNoteRange r)
 343 {
 344         if (r == FullRange) {
 345                 _lowest_note = 0;
 346                 _highest_note = 127;
 347         } else {
 348                 _lowest_note = _data_note_min;
 349                 _highest_note = _data_note_max;
 350         }
 351
 352         apply_note_range(_lowest_note, _highest_note, true);
 353 }
 354
 355 void
 356 MidiStreamView::apply_note_range(uint8_t lowest, uint8_t highest, bool to_region_views)
 357 {
 358         _highest_note = highest;
 359         _lowest_note = lowest;
 360         note_range_adjustment.set_page_size(_highest_note - _lowest_note);
 361         note_range_adjustment.set_value(_lowest_note);
 362         draw_note_lines();
 363
 364         if (to_region_views) {
 365                 for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 366                         ((MidiRegionView*)(*i))->apply_note_range(lowest, highest);
 367                 }
 368         }
 369
 370         NoteRangeChanged();
 371 }
 372
 373 void
 374 MidiStreamView::update_note_range(uint8_t note_num)
 375 {
 376         assert(note_num <= 127);
 377         _data_note_min = min(_data_note_min, note_num);
 378         _data_note_max = max(_data_note_max, note_num);
 379 }
 380
 381 void
 382 MidiStreamView::setup_rec_box ()
 383 {
 384         // cerr << _trackview.name() << " streamview SRB\n";
 385
 386         if (_trackview.session()->transport_rolling()) {
 387
 388                 if (!rec_active &&
 389                     _trackview.session()->record_status() == Session::Recording &&
 390                     _trackview.get_diskstream()->record_enabled()) {
 391
 392                         if (use_rec_regions && rec_regions.size() == rec_rects.size()) {
 393
 394                                 /* add a new region, but don't bother if they set use_rec_regions mid-record */
 395
 396                                 MidiRegion::SourceList sources;
 397
 398                                 rec_data_ready_connections.drop_connections ();
 399
 400                                 boost::shared_ptr<MidiDiskstream> mds = _trackview.midi_track()->midi_diskstream();
 401
 402                                 sources.push_back(mds->write_source());
 403
 404                                 mds->write_source()->ViewDataRangeReady.connect
 405                                         (rec_data_ready_connections,
 406                                          ui_bind (&MidiStreamView::rec_data_range_ready, this, _1, _2, boost::weak_ptr<Source>(mds->write_source())),
 407                                          gui_context());
 408
 409                                 // handle multi
 410
 411                                 nframes_t start = 0;
 412                                 if (rec_regions.size() > 0) {
 413                                         start = rec_regions.back().first->start()
 414                                                         + _trackview.get_diskstream()->get_captured_frames(rec_regions.size()-1);
 415                                 }
 416
 417                                 boost::shared_ptr<MidiRegion> region (boost::dynamic_pointer_cast<MidiRegion>
 418                                         (RegionFactory::create (sources, start, 1 , "", 0, Region::DefaultFlags, false)));
 419
 420                                 assert(region);
 421                                 region->block_property_changes ();
 422                                 region->set_position (_trackview.session()->transport_frame(), this);
 423                                 rec_regions.push_back (make_pair(region, (RegionView*)0));
 424
 425                                 // rec regions are destroyed in setup_rec_box
 426
 427                                 /* we add the region later */
 428                         }
 429
 430                         /* start a new rec box */
 431
 432                         boost::shared_ptr<MidiTrack> mt = _trackview.midi_track(); /* we know what it is already */
 433                         boost::shared_ptr<MidiDiskstream> ds = mt->midi_diskstream();
 434                         nframes_t frame_pos = ds->current_capture_start ();
 435                         gdouble xstart = _trackview.editor().frame_to_pixel (frame_pos);
 436                         gdouble xend;
 437                         uint32_t fill_color;
 438
 439                         assert(_trackview.midi_track()->mode() == Normal);
 440
 441                         xend = xstart;
 442                         fill_color = ARDOUR_UI::config()->canvasvar_RecordingRect.get();
 443
 444                         ArdourCanvas::SimpleRect * rec_rect = new Gnome::Canvas::SimpleRect (*canvas_group);
 445                         rec_rect->property_x1() = xstart;
 446                         rec_rect->property_y1() = 1.0;
 447                         rec_rect->property_x2() = xend;
 448                         rec_rect->property_y2() = (double) _trackview.current_height() - 1;
 449                         rec_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RecordingRect.get();
 450                         rec_rect->property_fill_color_rgba() = fill_color;
 451                         rec_rect->lower_to_bottom();
 452
 453                         RecBoxInfo recbox;
 454                         recbox.rectangle = rec_rect;
 455                         recbox.start = _trackview.session()->transport_frame();
 456                         recbox.length = 0;
 457
 458                         rec_rects.push_back (recbox);
 459
 460                         screen_update_connection.disconnect();
 461                         screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (
 462                                         sigc::mem_fun (*this, &MidiStreamView::update_rec_box));
 463                         rec_updating = true;
 464                         rec_active = true;
 465
 466                 } else if (rec_active &&
 467                            (_trackview.session()->record_status() != Session::Recording ||
 468                             !_trackview.get_diskstream()->record_enabled())) {
 469                         screen_update_connection.disconnect();
 470                         rec_active = false;
 471                         rec_updating = false;
 472                 }
 473
 474         } else {
 475
 476                 // cerr << "\tNOT rolling, rec_rects = " << rec_rects.size() << " rec_regions = " << rec_regions.size() << endl;
 477
 478                 if (!rec_rects.empty() || !rec_regions.empty()) {
 479
 480                         /* disconnect rapid update */
 481                         screen_update_connection.disconnect();
 482                         rec_data_ready_connections.drop_connections ();
 483
 484                         rec_updating = false;
 485                         rec_active = false;
 486
 487                         /* remove temp regions */
 488
 489                         for (list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator iter = rec_regions.begin(); iter != rec_regions.end();) {
 490                                 list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator tmp;
 491
 492                                 tmp = iter;
 493                                 ++tmp;
 494
 495                                 (*iter).first->drop_references ();
 496
 497                                 iter = tmp;
 498                         }
 499
 500                         rec_regions.clear();
 501
 502                         // cerr << "\tclear " << rec_rects.size() << " rec rects\n";
 503
 504                         /* transport stopped, clear boxes */
 505                         for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
 506                                 RecBoxInfo &rect = (*iter);
 507                                 delete rect.rectangle;
 508                         }
 509
 510                         rec_rects.clear();
 511
 512                 }
 513         }
 514 }
 515
 516 void
 517 MidiStreamView::update_rec_regions (boost::shared_ptr<MidiModel> data, nframes_t start, nframes_t dur)
 518 {
 519         ENSURE_GUI_THREAD (*this, &MidiStreamView::update_rec_regions, data, start, dur)
 520
 521         if (use_rec_regions) {
 522
 523                 uint32_t n = 0;
 524                 bool     update_range = false;
 525
 526                 for (list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator iter = rec_regions.begin();
 527                                 iter != rec_regions.end(); n++) {
 528
 529                         list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator tmp = iter;
 530                         ++tmp;
 531
 532                         if (!canvas_item_visible (rec_rects[n].rectangle)) {
 533                                 /* rect already hidden, this region is done */
 534                                 iter = tmp;
 535                                 continue;
 536                         }
 537
 538                         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion>(iter->first);
 539                         if (!region) {
 540                                 iter = tmp;
 541                                 continue;
 542                         }
 543
 544                         nframes_t origlen = region->length();
 545
 546                         if (region == rec_regions.back().first && rec_active) {
 547
 548                                 if (start >= region->midi_source(0)->timeline_position()) {
 549
 550                                         nframes_t nlen = start + dur - region->position();
 551
 552                                         if (nlen != region->length()) {
 553
 554                                                 region->freeze ();
 555                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 556                                                 region->set_length (start + dur - region->position(), this);
 557                                                 region->thaw ();
 558
 559                                                 if (origlen == 1) {
 560                                                         /* our special initial length */
 561                                                         iter->second = add_region_view_internal (region, false);
 562                                                         ((MidiRegionView*)iter->second)->begin_write();
 563                                                 }
 564
 565                                                 /* also update rect */
 566                                                 ArdourCanvas::SimpleRect * rect = rec_rects[n].rectangle;
 567                                                 gdouble xend = _trackview.editor().frame_to_pixel (region->position() + region->length());
 568                                                 rect->property_x2() = xend;
 569
 570                                                 ARDOUR::BeatsFramesConverter tconv(_trackview.session()->tempo_map(), region->position());
 571                                                 const MidiModel::TimeType start_beats = tconv.from(start);
 572
 573                                                 /* draw events */
 574                                                 MidiRegionView* mrv = (MidiRegionView*)iter->second;
 575
 576                                                 for (MidiModel::Notes::const_iterator i = data->note_lower_bound(start_beats);
 577                                                                 i != data->notes().end(); ++i) {
 578
 579                                                         const boost::shared_ptr<MidiRegionView::NoteType>& note = *i;
 580
 581                                                         nframes_t note_start_frames = tconv.to(note->time());
 582                                                         nframes_t note_end_frames   = tconv.to(note->end_time());
 583
 584                                                         if (note->length() > 0 && note_end_frames + region->position() > start)
 585                                                                 mrv->resolve_note(note->note(), note_end_frames);
 586
 587                                                         if (note_start_frames + region->position() < start) {
 588                                                                 continue;
 589                                                         }
 590
 591                                                         if (note_start_frames + region->position() > start + dur) {
 592                                                                 break;
 593                                                         }
 594
 595                                                         if (note->note() < _lowest_note) {
 596                                                                 _lowest_note = note->note();
 597                                                                 update_range = true;
 598                                                         } else if (note->note() > _highest_note) {
 599                                                                 _highest_note = note->note();
 600                                                                 update_range = true;
 601                                                         }
 602
 603                                                         mrv->add_note (note, !update_range);
 604                                                 }
 605
 606                                                 mrv->extend_active_notes();
 607                                         }
 608                                 }
 609
 610                         } else {
 611
 612                                 nframes_t nlen = _trackview.get_diskstream()->get_captured_frames(n);
 613
 614                                 if (nlen != region->length()) {
 615
 616                                         if (region->source_length(0) >= region->position() + nlen) {
 617
 618                                                 region->freeze ();
 619                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 620                                                 region->set_length (nlen, this);
 621                                                 region->thaw ();
 622
 623                                                 if (origlen == 1) {
 624                                                         /* our special initial length */
 625                                                         iter->second = add_region_view_internal (region, false);
 626                                                 }
 627
 628                                                 /* also hide rect */
 629                                                 ArdourCanvas::Item * rect = rec_rects[n].rectangle;
 630                                                 rect->hide();
 631
 632                                         }
 633                                 }
 634                         }
 635
 636                         iter = tmp;
 637                 }
 638
 639                 if (update_range)
 640                         update_contents_height();
 641         }
 642 }
 643
 644 void
 645 MidiStreamView::rec_data_range_ready (nframes_t start, nframes_t cnt, boost::weak_ptr<Source> weak_src)
 646 {
 647         // this is called from the butler thread for now
 648
 649         ENSURE_GUI_THREAD (*this, &MidiStreamView::rec_data_range_ready, start, cnt, weak_src)
 650
 651         boost::shared_ptr<SMFSource> src (boost::dynamic_pointer_cast<SMFSource>(weak_src.lock()));
 652
 653         if (!src) {
 654                 return;
 655         }
 656
 657         if (start + cnt > last_rec_data_frame) {
 658                 last_rec_data_frame = start + cnt;
 659         }
 660
 661         this->update_rec_regions (src->model(), start, cnt);
 662 }
 663
 664 void
 665 MidiStreamView::color_handler ()
 666 {
 667         //case cMidiTrackBase:
 668         if (_trackview.is_midi_track()) {
 669                 //canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiTrackBase.get();
 670         }
 671
 672         //case cMidiBusBase:
 673         if (!_trackview.is_midi_track()) {
 674                 //canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiBusBase.get();;
 675         }
 676 }
 677
 678 void
 679 MidiStreamView::note_range_adjustment_changed()
 680 {
 681         double sum = note_range_adjustment.get_value() + note_range_adjustment.get_page_size();
 682         int lowest = (int) floor(note_range_adjustment.get_value());
 683         int highest;
 684
 685         if (sum == _range_sum_cache) {
 686                 //cerr << "cached" << endl;
 687                 highest = (int) floor(sum);
 688         } else {
 689                 //cerr << "recalc" << endl;
 690                 highest = lowest + (int) floor(note_range_adjustment.get_page_size());
 691                 _range_sum_cache = sum;
 692         }
 693
 694         if (lowest == _lowest_note && highest == _highest_note) {
 695                 return;
 696         }
 697
 698         //cerr << "note range adjustment changed: " << lowest << " " << highest << endl;
 699         //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;
 700
 701         _lowest_note = lowest;
 702         _highest_note = highest;
 703         apply_note_range(lowest, highest, true);
 704 }
 705