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 a group dedicated to MIDI underlays. Audio underlays are not in this group. */
  74         midi_underlay_group = new ArdourCanvas::Group (*_canvas_group);
  75         midi_underlay_group->lower_to_bottom();
  76
  77         /* put the note lines in the timeaxisview's group, so it
  78            can be put below ghost regions from MIDI underlays*/
  79         _note_lines = new ArdourCanvas::LineSet(*_canvas_group, ArdourCanvas::LineSet::Horizontal);
  80
  81         _note_lines->property_x1() = 0;
  82         _note_lines->property_y1() = 0;
  83         _note_lines->property_x2() = trackview().editor().frame_to_pixel (max_frames);
  84         _note_lines->property_y2() = 0;
  85
  86         _note_lines->signal_event().connect(sigc::bind(
  87                         sigc::mem_fun(_trackview.editor(), &PublicEditor::canvas_stream_view_event),
  88                         _note_lines, &_trackview));
  89
  90         _note_lines->lower_to_bottom();
  91
  92         ColorsChanged.connect(sigc::mem_fun(*this, &MidiStreamView::draw_note_lines));
  93
  94         note_range_adjustment.set_page_size(_highest_note - _lowest_note);
  95         note_range_adjustment.set_value(_lowest_note);
  96
  97         note_range_adjustment.signal_value_changed().connect(
  98                         sigc::mem_fun(*this, &MidiStreamView::note_range_adjustment_changed));
  99 }
 100
 101 MidiStreamView::~MidiStreamView ()
 102 {
 103 }
 104
 105 static void
 106 veto_note_range(uint8_t& min, uint8_t& max)
 107 {
 108         /* Legal notes, thanks */
 109         clamp_to_0_127(min);
 110         clamp_to_0_127(max);
 111
 112         /* Always display at least one octave in [0, 127] */
 113         if (max == 127) {
 114                 if (min > (127 - 11)) {
 115                         min = 127 - 11;
 116                 }
 117         } else if (max < min + 11) {
 118                 uint8_t d = 11 - (max - min);
 119                 if (max + d/2 > 127) {
 120                         min -= d;
 121                 } else {
 122                         min -= d / 2;
 123                         max += d / 2;
 124                 }
 125         }
 126         assert(max - min >= 11);
 127         assert(max <= 127);
 128         assert(min <= 127);
 129 }
 130
 131 RegionView*
 132 MidiStreamView::create_region_view (boost::shared_ptr<Region> r, bool /*wfd*/, bool)
 133 {
 134         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion> (r);
 135
 136         if (region == 0) {
 137                 return 0;
 138         }
 139
 140         RegionView* region_view = new MidiRegionView (_canvas_group, _trackview, region,
 141                                                       _samples_per_unit, region_color);
 142
 143         region_view->init (region_color, false);
 144
 145         return region_view;
 146 }
 147
 148 RegionView*
 149 MidiStreamView::add_region_view_internal (boost::shared_ptr<Region> r, bool wfd, bool recording)
 150 {
 151         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion> (r);
 152
 153         if (region == 0) {
 154                 return 0;
 155         }
 156
 157         for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 158                 if ((*i)->region() == r) {
 159
 160                         /* great. we already have a MidiRegionView for this Region. use it again. */
 161
 162                         (*i)->set_valid (true);
 163
 164                         display_region(dynamic_cast<MidiRegionView*>(*i), wfd);
 165
 166                         return 0;
 167                 }
 168         }
 169
 170         MidiRegionView* region_view = dynamic_cast<MidiRegionView*> (create_region_view (r, wfd, recording));
 171         if (region_view == 0) {
 172                 return 0;
 173         }
 174
 175         region_views.push_front (region_view);
 176
 177         /* display events and find note range */
 178         display_region (region_view, wfd);
 179
 180         /* catch regionview going away */
 181         region->DropReferences.connect (*this, invalidator (*this), boost::bind (&MidiStreamView::remove_region_view, this, region), gui_context());
 182
 183         RegionViewAdded (region_view);
 184
 185         return region_view;
 186 }
 187
 188 void
 189 MidiStreamView::display_region(MidiRegionView* region_view, bool load_model)
 190 {
 191         if ( ! region_view)
 192                 return;
 193
 194         region_view->enable_display(true);
 195
 196         boost::shared_ptr<MidiSource> source(region_view->midi_region()->midi_source(0));
 197
 198         if (load_model) {
 199                 source->load_model();
 200         }
 201
 202         _range_dirty = update_data_note_range(
 203                         source->model()->lowest_note(),
 204                         source->model()->highest_note());
 205
 206         // Display region contents
 207         region_view->set_height(height);
 208         region_view->display_model(source->model());
 209 }
 210
 211 void
 212 MidiStreamView::display_track (boost::shared_ptr<Track> tr)
 213 {
 214         StreamView::display_track (tr);
 215
 216         draw_note_lines();
 217
 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_track ()
 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.track()->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.track()->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
 302         draw_note_lines();
 303 }
 304
 305 void
 306 MidiStreamView::draw_note_lines()
 307 {
 308         double y;
 309         double prev_y = contents_height();
 310         uint32_t color;
 311
 312         _note_lines->clear();
 313
 314         if(height < 140){
 315                 return;
 316         }
 317
 318         for (int i = lowest_note(); i <= highest_note(); ++i) {
 319                 y = floor(note_to_y(i));
 320
 321                 _note_lines->add_line(prev_y, 1.0, ARDOUR_UI::config()->canvasvar_PianoRollBlackOutline.get());
 322
 323                 switch (i % 12) {
 324                 case 1:
 325                 case 3:
 326                 case 6:
 327                 case 8:
 328                 case 10:
 329                         color = ARDOUR_UI::config()->canvasvar_PianoRollBlack.get();
 330                         break;
 331                 default:
 332                         color = ARDOUR_UI::config()->canvasvar_PianoRollWhite.get();
 333                         break;
 334                 }
 335
 336                 if (i == highest_note()) {
 337                         _note_lines->add_line(y, prev_y - y, color);
 338                 } else {
 339                         _note_lines->add_line(y + 1.0, prev_y - y - 1.0, color);
 340                 }
 341
 342                 prev_y = y;
 343         }
 344 }
 345
 346 void
 347 MidiStreamView::set_note_range(VisibleNoteRange r)
 348 {
 349         if (r == FullRange) {
 350                 _lowest_note = 0;
 351                 _highest_note = 127;
 352         } else {
 353                 _lowest_note = _data_note_min;
 354                 _highest_note = _data_note_max;
 355         }
 356
 357         apply_note_range(_lowest_note, _highest_note, true);
 358 }
 359
 360 void
 361 MidiStreamView::apply_note_range(uint8_t lowest, uint8_t highest, bool to_region_views)
 362 {
 363         _highest_note = highest;
 364         _lowest_note = lowest;
 365         note_range_adjustment.set_page_size(_highest_note - _lowest_note);
 366         note_range_adjustment.set_value(_lowest_note);
 367         draw_note_lines();
 368
 369         if (to_region_views) {
 370                 for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 371                         ((MidiRegionView*)(*i))->apply_note_range(lowest, highest);
 372                 }
 373         }
 374
 375         NoteRangeChanged();
 376 }
 377
 378 void
 379 MidiStreamView::update_note_range(uint8_t note_num)
 380 {
 381         assert(note_num <= 127);
 382         _data_note_min = min(_data_note_min, note_num);
 383         _data_note_max = max(_data_note_max, note_num);
 384 }
 385
 386 void
 387 MidiStreamView::setup_rec_box ()
 388 {
 389         // cerr << _trackview.name() << " streamview SRB\n";
 390
 391         if (_trackview.session()->transport_rolling()) {
 392
 393                 if (!rec_active &&
 394                     _trackview.session()->record_status() == Session::Recording &&
 395                     _trackview.track()->record_enabled()) {
 396
 397                         if (Config->get_show_waveforms_while_recording() && rec_regions.size() == rec_rects.size()) {
 398
 399                                 /* add a new region, but don't bother if they set show-waveforms-while-recording mid-record */
 400
 401                                 MidiRegion::SourceList sources;
 402
 403                                 rec_data_ready_connections.drop_connections ();
 404
 405                                 sources.push_back (_trackview.midi_track()->write_source());
 406
 407                                 _trackview.midi_track()->write_source()->ViewDataRangeReady.connect
 408                                         (rec_data_ready_connections,
 409                                          invalidator (*this),
 410                                          ui_bind (&MidiStreamView::rec_data_range_ready, this, _1, _2, boost::weak_ptr<Source>(_trackview.midi_track()->write_source())),
 411                                          gui_context());
 412
 413                                 // handle multi
 414
 415                                 nframes_t start = 0;
 416                                 if (rec_regions.size() > 0) {
 417                                         start = rec_regions.back().first->start()
 418                                                         + _trackview.track()->get_captured_frames(rec_regions.size()-1);
 419                                 }
 420
 421                                 PropertyList plist;
 422
 423                                 plist.add (ARDOUR::Properties::start, start);
 424                                 plist.add (ARDOUR::Properties::length, 1);
 425                                 plist.add (ARDOUR::Properties::name, string());
 426                                 plist.add (ARDOUR::Properties::layer, 0);
 427
 428                                 boost::shared_ptr<MidiRegion> region (boost::dynamic_pointer_cast<MidiRegion>
 429                                                                       (RegionFactory::create (sources, plist, false)));
 430
 431                                 assert(region);
 432                                 region->block_property_changes ();
 433                                 region->set_position (_trackview.session()->transport_frame(), this);
 434                                 rec_regions.push_back (make_pair(region, (RegionView*)0));
 435
 436                                 // rec regions are destroyed in setup_rec_box
 437
 438                                 /* we add the region later */
 439                         }
 440
 441                         /* start a new rec box */
 442
 443                         boost::shared_ptr<MidiTrack> mt = _trackview.midi_track(); /* we know what it is already */
 444                         nframes_t frame_pos = mt->current_capture_start ();
 445                         gdouble xstart = _trackview.editor().frame_to_pixel (frame_pos);
 446                         gdouble xend;
 447                         uint32_t fill_color;
 448
 449                         assert(_trackview.midi_track()->mode() == Normal);
 450
 451                         xend = xstart;
 452                         fill_color = ARDOUR_UI::config()->canvasvar_RecordingRect.get();
 453
 454                         ArdourCanvas::SimpleRect * rec_rect = new Gnome::Canvas::SimpleRect (*_canvas_group);
 455                         rec_rect->property_x1() = xstart;
 456                         rec_rect->property_y1() = 1.0;
 457                         rec_rect->property_x2() = xend;
 458                         rec_rect->property_y2() = (double) _trackview.current_height() - 1;
 459                         rec_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RecordingRect.get();
 460                         rec_rect->property_fill_color_rgba() = fill_color;
 461                         rec_rect->lower_to_bottom();
 462
 463                         RecBoxInfo recbox;
 464                         recbox.rectangle = rec_rect;
 465                         recbox.start = _trackview.session()->transport_frame();
 466                         recbox.length = 0;
 467
 468                         rec_rects.push_back (recbox);
 469
 470                         screen_update_connection.disconnect();
 471                         screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (
 472                                         sigc::mem_fun (*this, &MidiStreamView::update_rec_box));
 473                         rec_updating = true;
 474                         rec_active = true;
 475
 476                 } else if (rec_active &&
 477                            (_trackview.session()->record_status() != Session::Recording ||
 478                             !_trackview.track()->record_enabled())) {
 479                         screen_update_connection.disconnect();
 480                         rec_active = false;
 481                         rec_updating = false;
 482                 }
 483
 484         } else {
 485
 486                 // cerr << "\tNOT rolling, rec_rects = " << rec_rects.size() << " rec_regions = " << rec_regions.size() << endl;
 487
 488                 if (!rec_rects.empty() || !rec_regions.empty()) {
 489
 490                         /* disconnect rapid update */
 491                         screen_update_connection.disconnect();
 492                         rec_data_ready_connections.drop_connections ();
 493
 494                         rec_updating = false;
 495                         rec_active = false;
 496
 497                         /* remove temp regions */
 498
 499                         for (list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator iter = rec_regions.begin(); iter != rec_regions.end();) {
 500                                 list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator tmp;
 501
 502                                 tmp = iter;
 503                                 ++tmp;
 504
 505                                 (*iter).first->drop_references ();
 506
 507                                 iter = tmp;
 508                         }
 509
 510                         rec_regions.clear();
 511
 512                         // cerr << "\tclear " << rec_rects.size() << " rec rects\n";
 513
 514                         /* transport stopped, clear boxes */
 515                         for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
 516                                 RecBoxInfo &rect = (*iter);
 517                                 delete rect.rectangle;
 518                         }
 519
 520                         rec_rects.clear();
 521
 522                 }
 523         }
 524 }
 525
 526 void
 527 MidiStreamView::update_rec_regions (boost::shared_ptr<MidiModel> data, nframes_t start, nframes_t dur)
 528 {
 529         ENSURE_GUI_THREAD (*this, &MidiStreamView::update_rec_regions, data, start, dur)
 530
 531         if (Config->get_show_waveforms_while_recording ()) {
 532
 533                 uint32_t n = 0;
 534                 bool     update_range = false;
 535
 536                 for (list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator iter = rec_regions.begin();
 537                                 iter != rec_regions.end(); n++) {
 538
 539                         list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator tmp = iter;
 540                         ++tmp;
 541
 542                         if (!canvas_item_visible (rec_rects[n].rectangle)) {
 543                                 /* rect already hidden, this region is done */
 544                                 iter = tmp;
 545                                 continue;
 546                         }
 547
 548                         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion>(iter->first);
 549                         if (!region) {
 550                                 iter = tmp;
 551                                 continue;
 552                         }
 553
 554                         nframes_t origlen = region->length();
 555
 556                         if (region == rec_regions.back().first && rec_active) {
 557
 558                                 if (start >= region->midi_source(0)->timeline_position()) {
 559
 560                                         nframes_t nlen = start + dur - region->position();
 561
 562                                         if (nlen != region->length()) {
 563
 564                                                 region->suspend_property_changes ();
 565                                                 region->set_position (_trackview.track()->get_capture_start_frame(n), this);
 566                                                 region->set_length (start + dur - region->position(), this);
 567                                                 region->resume_property_changes ();
 568
 569                                                 if (origlen == 1) {
 570                                                         /* our special initial length */
 571                                                         iter->second = add_region_view_internal (region, false);
 572                                                         ((MidiRegionView*)iter->second)->begin_write();
 573                                                 }
 574
 575                                                 /* also update rect */
 576                                                 ArdourCanvas::SimpleRect * rect = rec_rects[n].rectangle;
 577                                                 gdouble xend = _trackview.editor().frame_to_pixel (region->position() + region->length());
 578                                                 rect->property_x2() = xend;
 579
 580                                                 ARDOUR::BeatsFramesConverter tconv(_trackview.session()->tempo_map(), region->position());
 581                                                 const MidiModel::TimeType start_beats = tconv.from(start);
 582
 583                                                 /* draw events */
 584                                                 MidiRegionView* mrv = (MidiRegionView*)iter->second;
 585
 586                                                 for (MidiModel::Notes::const_iterator i = data->note_lower_bound(start_beats);
 587                                                                 i != data->notes().end(); ++i) {
 588
 589                                                         const boost::shared_ptr<MidiRegionView::NoteType>& note = *i;
 590
 591                                                         nframes_t note_start_frames = tconv.to(note->time());
 592                                                         nframes_t note_end_frames   = tconv.to(note->end_time());
 593
 594                                                         if (note->length() > 0 && note_end_frames + region->position() > start)
 595                                                                 mrv->resolve_note(note->note(), note_end_frames);
 596
 597                                                         if (note_start_frames + region->position() < start) {
 598                                                                 continue;
 599                                                         }
 600
 601                                                         if (note_start_frames + region->position() > start + dur) {
 602                                                                 break;
 603                                                         }
 604
 605                                                         if (note->note() < _lowest_note) {
 606                                                                 _lowest_note = note->note();
 607                                                                 update_range = true;
 608                                                         } else if (note->note() > _highest_note) {
 609                                                                 _highest_note = note->note();
 610                                                                 update_range = true;
 611                                                         }
 612
 613                                                         mrv->add_note (note, !update_range);
 614                                                 }
 615
 616                                                 mrv->extend_active_notes();
 617                                         }
 618                                 }
 619
 620                         } else {
 621
 622                                 nframes_t nlen = _trackview.track()->get_captured_frames(n);
 623
 624                                 if (nlen != region->length()) {
 625
 626                                         if (region->source_length(0) >= region->position() + nlen) {
 627
 628                                                 region->suspend_property_changes ();
 629                                                 region->set_position (_trackview.track()->get_capture_start_frame(n), this);
 630                                                 region->set_length (nlen, this);
 631                                                 region->resume_property_changes ();
 632
 633                                                 if (origlen == 1) {
 634                                                         /* our special initial length */
 635                                                         iter->second = add_region_view_internal (region, false);
 636                                                 }
 637
 638                                                 /* also hide rect */
 639                                                 ArdourCanvas::Item * rect = rec_rects[n].rectangle;
 640                                                 rect->hide();
 641
 642                                         }
 643                                 }
 644                         }
 645
 646                         iter = tmp;
 647                 }
 648
 649                 if (update_range)
 650                         update_contents_height();
 651         }
 652 }
 653
 654 void
 655 MidiStreamView::rec_data_range_ready (nframes_t start, nframes_t cnt, boost::weak_ptr<Source> weak_src)
 656 {
 657         // this is called from the butler thread for now
 658
 659         ENSURE_GUI_THREAD (*this, &MidiStreamView::rec_data_range_ready, start, cnt, weak_src)
 660
 661         boost::shared_ptr<SMFSource> src (boost::dynamic_pointer_cast<SMFSource>(weak_src.lock()));
 662
 663         if (!src) {
 664                 return;
 665         }
 666
 667         if (start + cnt > last_rec_data_frame) {
 668                 last_rec_data_frame = start + cnt;
 669         }
 670
 671         this->update_rec_regions (src->model(), start, cnt);
 672 }
 673
 674 void
 675 MidiStreamView::color_handler ()
 676 {
 677         //case cMidiTrackBase:
 678         if (_trackview.is_midi_track()) {
 679                 //canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiTrackBase.get();
 680         }
 681
 682         //case cMidiBusBase:
 683         if (!_trackview.is_midi_track()) {
 684                 //canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiBusBase.get();;
 685         }
 686 }
 687
 688 void
 689 MidiStreamView::note_range_adjustment_changed()
 690 {
 691         double sum = note_range_adjustment.get_value() + note_range_adjustment.get_page_size();
 692         int lowest = (int) floor(note_range_adjustment.get_value());
 693         int highest;
 694
 695         if (sum == _range_sum_cache) {
 696                 //cerr << "cached" << endl;
 697                 highest = (int) floor(sum);
 698         } else {
 699                 //cerr << "recalc" << endl;
 700                 highest = lowest + (int) floor(note_range_adjustment.get_page_size());
 701                 _range_sum_cache = sum;
 702         }
 703
 704         if (lowest == _lowest_note && highest == _highest_note) {
 705                 return;
 706         }
 707
 708         //cerr << "note range adjustment changed: " << lowest << " " << highest << endl;
 709         //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;
 710
 711         _lowest_note = lowest;
 712         _highest_note = highest;
 713         apply_note_range(lowest, highest, true);
 714 }
 715