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         color_handler ();
  68
  69         /* use a group dedicated to MIDI underlays. Audio underlays are not in this group. */
  70         midi_underlay_group = new ArdourCanvas::Group (*_canvas_group);
  71         midi_underlay_group->lower_to_bottom();
  72
  73         /* put the note lines in the timeaxisview's group, so it
  74            can be put below ghost regions from MIDI underlays*/
  75         _note_lines = new ArdourCanvas::LineSet(*_canvas_group, ArdourCanvas::LineSet::Horizontal);
  76
  77         _note_lines->property_x1() = 0;
  78         _note_lines->property_y1() = 0;
  79         _note_lines->property_x2() = trackview().editor().frame_to_pixel (max_frames);
  80         _note_lines->property_y2() = 0;
  81
  82         _note_lines->signal_event().connect(sigc::bind(
  83                         sigc::mem_fun(_trackview.editor(), &PublicEditor::canvas_stream_view_event),
  84                         _note_lines, &_trackview));
  85
  86         _note_lines->lower_to_bottom();
  87
  88         ColorsChanged.connect(sigc::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(
  94                         sigc::mem_fun(*this, &MidiStreamView::note_range_adjustment_changed));
  95 }
  96
  97 MidiStreamView::~MidiStreamView ()
  98 {
  99 }
 100
 101 static void
 102 veto_note_range(uint8_t& min, uint8_t& max)
 103 {
 104         /* Legal notes, thanks */
 105         clamp_to_0_127(min);
 106         clamp_to_0_127(max);
 107
 108         /* Always display at least one octave in [0, 127] */
 109         if (max == 127) {
 110                 if (min > (127 - 11)) {
 111                         min = 127 - 11;
 112                 }
 113         } else if (max < min + 11) {
 114                 uint8_t d = 11 - (max - min);
 115                 if (max + d/2 > 127) {
 116                         min -= d;
 117                 } else {
 118                         min -= d / 2;
 119                         max += d / 2;
 120                 }
 121         }
 122         assert(max - min >= 11);
 123         assert(max <= 127);
 124         assert(min <= 127);
 125 }
 126
 127 RegionView*
 128 MidiStreamView::create_region_view (boost::shared_ptr<Region> r, bool /*wfd*/, bool)
 129 {
 130         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion> (r);
 131
 132         if (region == 0) {
 133                 return 0;
 134         }
 135
 136         RegionView* region_view = new MidiRegionView (_canvas_group, _trackview, region,
 137                                                       _samples_per_unit, region_color);
 138
 139         region_view->init (region_color, false);
 140
 141         return region_view;
 142 }
 143
 144 RegionView*
 145 MidiStreamView::add_region_view_internal (boost::shared_ptr<Region> r, bool wfd, bool recording)
 146 {
 147         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion> (r);
 148
 149         if (region == 0) {
 150                 return 0;
 151         }
 152
 153         for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 154                 if ((*i)->region() == r) {
 155
 156                         /* great. we already have a MidiRegionView for this Region. use it again. */
 157
 158                         (*i)->set_valid (true);
 159
 160                         display_region(dynamic_cast<MidiRegionView*>(*i), wfd);
 161
 162                         return 0;
 163                 }
 164         }
 165
 166         MidiRegionView* region_view = dynamic_cast<MidiRegionView*> (create_region_view (r, wfd, recording));
 167         if (region_view == 0) {
 168                 return 0;
 169         }
 170
 171         region_views.push_front (region_view);
 172
 173         /* display events and find note range */
 174         display_region (region_view, wfd);
 175
 176         /* catch regionview going away */
 177         region->DropReferences.connect (*this, invalidator (*this), boost::bind (&MidiStreamView::remove_region_view, this, region), gui_context());
 178
 179         RegionViewAdded (region_view);
 180
 181         return region_view;
 182 }
 183
 184 void
 185 MidiStreamView::display_region(MidiRegionView* region_view, bool load_model)
 186 {
 187         if ( ! region_view)
 188                 return;
 189
 190         region_view->enable_display(true);
 191
 192         boost::shared_ptr<MidiSource> source(region_view->midi_region()->midi_source(0));
 193
 194         if (load_model) {
 195                 source->load_model();
 196         }
 197
 198         _range_dirty = update_data_note_range(
 199                         source->model()->lowest_note(),
 200                         source->model()->highest_note());
 201
 202         // Display region contents
 203         region_view->set_height(height);
 204         region_view->display_model(source->model());
 205 }
 206
 207 void
 208 MidiStreamView::display_track (boost::shared_ptr<Track> tr)
 209 {
 210         StreamView::display_track (tr);
 211
 212         draw_note_lines();
 213
 214         NoteRangeChanged();
 215 }
 216
 217 void
 218 MidiStreamView::update_contents_metrics(boost::shared_ptr<Region> r)
 219 {
 220         boost::shared_ptr<MidiRegion> mr = boost::dynamic_pointer_cast<MidiRegion>(r);
 221         if (mr) {
 222                 mr->midi_source(0)->load_model();
 223                 _range_dirty = update_data_note_range(
 224                                 mr->model()->lowest_note(),
 225                                 mr->model()->highest_note());
 226         }
 227 }
 228
 229 bool
 230 MidiStreamView::update_data_note_range(uint8_t min, uint8_t max)
 231 {
 232         bool dirty = false;
 233         if (min < _data_note_min) {
 234                 _data_note_min = min;
 235                 dirty = true;
 236         }
 237         if (max > _data_note_max) {
 238                 _data_note_max = max;
 239                 dirty = true;
 240         }
 241         return dirty;
 242 }
 243
 244 void
 245 MidiStreamView::redisplay_track ()
 246 {
 247         if (!_trackview.is_midi_track()) {
 248                 return;
 249         }
 250
 251         list<RegionView*>::iterator i;
 252
 253         // Load models if necessary, and find note range of all our contents
 254         _range_dirty = false;
 255         _data_note_min = 127;
 256         _data_note_max = 0;
 257         _trackview.track()->playlist()->foreach_region(
 258                 sigc::mem_fun (*this, &StreamView::update_contents_metrics)
 259                 );
 260
 261         // No notes, use default range
 262         if (!_range_dirty) {
 263                 _data_note_min = 60;
 264                 _data_note_max = 71;
 265         }
 266
 267         // Extend visible range to show newly recorded data, if necessary
 268         _lowest_note  = std::min(_lowest_note, _data_note_min);
 269         _highest_note = std::max(_highest_note, _data_note_max);
 270
 271         veto_note_range(_lowest_note, _highest_note);
 272
 273         // Flag region views as invalid and disable drawing
 274         for (i = region_views.begin(); i != region_views.end(); ++i) {
 275                 (*i)->set_valid(false);
 276                 (*i)->enable_display(false);
 277         }
 278
 279         // Add and display region views, and flag them as valid
 280         _trackview.track()->playlist()->foreach_region(
 281                 sigc::hide_return (sigc::mem_fun (*this, &StreamView::add_region_view))
 282                 );
 283
 284         // Stack regions by layer, and remove invalid regions
 285         layer_regions();
 286
 287         // Update note range (not regions which are correct) and draw note lines
 288         apply_note_range(_lowest_note, _highest_note, false);
 289 }
 290
 291
 292 void
 293 MidiStreamView::update_contents_height ()
 294 {
 295         StreamView::update_contents_height();
 296         _note_lines->property_y2() = height;
 297
 298         apply_note_range (lowest_note(), highest_note(), true);
 299 }
 300
 301 void
 302 MidiStreamView::draw_note_lines()
 303 {
 304         double y;
 305         double prev_y = contents_height();
 306         uint32_t color;
 307
 308         _note_lines->clear();
 309
 310         if(height < 140){
 311                 return;
 312         }
 313
 314         for (int i = lowest_note(); i <= highest_note(); ++i) {
 315                 y = floor(note_to_y(i));
 316
 317                 _note_lines->add_line(prev_y, 1.0, ARDOUR_UI::config()->canvasvar_PianoRollBlackOutline.get());
 318
 319                 switch (i % 12) {
 320                 case 1:
 321                 case 3:
 322                 case 6:
 323                 case 8:
 324                 case 10:
 325                         color = ARDOUR_UI::config()->canvasvar_PianoRollBlack.get();
 326                         break;
 327                 default:
 328                         color = ARDOUR_UI::config()->canvasvar_PianoRollWhite.get();
 329                         break;
 330                 }
 331
 332                 if (i == highest_note()) {
 333                         _note_lines->add_line(y, prev_y - y, color);
 334                 } else {
 335                         _note_lines->add_line(y + 1.0, prev_y - y - 1.0, color);
 336                 }
 337
 338                 prev_y = y;
 339         }
 340 }
 341
 342 void
 343 MidiStreamView::set_note_range(VisibleNoteRange r)
 344 {
 345         if (r == FullRange) {
 346                 _lowest_note = 0;
 347                 _highest_note = 127;
 348         } else {
 349                 _lowest_note = _data_note_min;
 350                 _highest_note = _data_note_max;
 351         }
 352
 353         apply_note_range(_lowest_note, _highest_note, true);
 354 }
 355
 356 void
 357 MidiStreamView::apply_note_range(uint8_t lowest, uint8_t highest, bool to_region_views)
 358 {
 359         _highest_note = highest;
 360         _lowest_note = lowest;
 361
 362         int range = _highest_note - _lowest_note;
 363         int pixels_per_note = floor (height/range);
 364
 365         /* do not grow note height beyond 10 pixels */
 366         if (pixels_per_note > 10) {
 367
 368                 int available_note_range = floor ((height)/10);
 369                 int additional_notes = available_note_range - range;
 370
 371                 /* distribute additional notes to higher and lower ranges, clamp at 0 and 127 */
 372                 for (int i = 0; i < additional_notes; i++){
 373
 374                         if (i % 2 && _highest_note < 127){
 375                                 _highest_note++;
 376                         }
 377                         else if (i % 2) {
 378                                 _lowest_note--;
 379                         }
 380                         else if (_lowest_note > 0){
 381                                 _lowest_note--;
 382                         }
 383                         else {
 384                                 _highest_note++;
 385                         }
 386                 }
 387         }
 388
 389         note_range_adjustment.set_page_size(_highest_note - _lowest_note);
 390         note_range_adjustment.set_value(_lowest_note);
 391
 392         draw_note_lines();
 393
 394         if (to_region_views) {
 395                 for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 396                         ((MidiRegionView*)(*i))->apply_note_range(_lowest_note, _highest_note);
 397                 }
 398         }
 399
 400         NoteRangeChanged();
 401 }
 402
 403 void
 404 MidiStreamView::update_note_range(uint8_t note_num)
 405 {
 406         assert(note_num <= 127);
 407         _data_note_min = min(_data_note_min, note_num);
 408         _data_note_max = max(_data_note_max, note_num);
 409 }
 410
 411 void
 412 MidiStreamView::setup_rec_box ()
 413 {
 414         // cerr << _trackview.name() << " streamview SRB\n";
 415
 416         if (_trackview.session()->transport_rolling()) {
 417
 418                 if (!rec_active &&
 419                     _trackview.session()->record_status() == Session::Recording &&
 420                     _trackview.track()->record_enabled()) {
 421
 422                         if (Config->get_show_waveforms_while_recording() && rec_regions.size() == rec_rects.size()) {
 423
 424                                 /* add a new region, but don't bother if they set show-waveforms-while-recording mid-record */
 425
 426                                 MidiRegion::SourceList sources;
 427
 428                                 rec_data_ready_connections.drop_connections ();
 429
 430                                 sources.push_back (_trackview.midi_track()->write_source());
 431
 432                                 _trackview.midi_track()->write_source()->ViewDataRangeReady.connect
 433                                         (rec_data_ready_connections,
 434                                          invalidator (*this),
 435                                          ui_bind (&MidiStreamView::rec_data_range_ready, this, _1, _2, boost::weak_ptr<Source>(_trackview.midi_track()->write_source())),
 436                                          gui_context());
 437
 438                                 // handle multi
 439
 440                                 nframes_t start = 0;
 441                                 if (rec_regions.size() > 0) {
 442                                         start = rec_regions.back().first->start()
 443                                                         + _trackview.track()->get_captured_frames(rec_regions.size()-1);
 444                                 }
 445
 446                                 PropertyList plist;
 447
 448                                 plist.add (ARDOUR::Properties::start, start);
 449                                 plist.add (ARDOUR::Properties::length, 1);
 450                                 plist.add (ARDOUR::Properties::name, string());
 451                                 plist.add (ARDOUR::Properties::layer, 0);
 452
 453                                 boost::shared_ptr<MidiRegion> region (boost::dynamic_pointer_cast<MidiRegion>
 454                                                                       (RegionFactory::create (sources, plist, false)));
 455
 456                                 assert(region);
 457                                 region->block_property_changes ();
 458                                 region->set_position (_trackview.session()->transport_frame(), this);
 459                                 rec_regions.push_back (make_pair(region, (RegionView*)0));
 460
 461                                 // rec regions are destroyed in setup_rec_box
 462
 463                                 /* we add the region later */
 464                         }
 465
 466                         /* start a new rec box */
 467
 468                         boost::shared_ptr<MidiTrack> mt = _trackview.midi_track(); /* we know what it is already */
 469                         nframes_t frame_pos = mt->current_capture_start ();
 470                         gdouble xstart = _trackview.editor().frame_to_pixel (frame_pos);
 471                         gdouble xend;
 472                         uint32_t fill_color;
 473
 474                         assert(_trackview.midi_track()->mode() == Normal);
 475
 476                         xend = xstart;
 477                         fill_color = ARDOUR_UI::config()->canvasvar_RecordingRect.get();
 478
 479                         ArdourCanvas::SimpleRect * rec_rect = new Gnome::Canvas::SimpleRect (*_canvas_group);
 480                         rec_rect->property_x1() = xstart;
 481                         rec_rect->property_y1() = 1.0;
 482                         rec_rect->property_x2() = xend;
 483                         rec_rect->property_y2() = (double) _trackview.current_height() - 1;
 484                         rec_rect->property_outline_color_rgba() = ARDOUR_UI::config()->canvasvar_RecordingRect.get();
 485                         rec_rect->property_fill_color_rgba() = fill_color;
 486                         rec_rect->lower_to_bottom();
 487
 488                         RecBoxInfo recbox;
 489                         recbox.rectangle = rec_rect;
 490                         recbox.start = _trackview.session()->transport_frame();
 491                         recbox.length = 0;
 492
 493                         rec_rects.push_back (recbox);
 494
 495                         screen_update_connection.disconnect();
 496                         screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (
 497                                         sigc::mem_fun (*this, &MidiStreamView::update_rec_box));
 498                         rec_updating = true;
 499                         rec_active = true;
 500
 501                 } else if (rec_active &&
 502                            (_trackview.session()->record_status() != Session::Recording ||
 503                             !_trackview.track()->record_enabled())) {
 504                         screen_update_connection.disconnect();
 505                         rec_active = false;
 506                         rec_updating = false;
 507                 }
 508
 509         } else {
 510
 511                 // cerr << "\tNOT rolling, rec_rects = " << rec_rects.size() << " rec_regions = " << rec_regions.size() << endl;
 512
 513                 if (!rec_rects.empty() || !rec_regions.empty()) {
 514
 515                         /* disconnect rapid update */
 516                         screen_update_connection.disconnect();
 517                         rec_data_ready_connections.drop_connections ();
 518
 519                         rec_updating = false;
 520                         rec_active = false;
 521
 522                         /* remove temp regions */
 523
 524                         for (list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator iter = rec_regions.begin(); iter != rec_regions.end();) {
 525                                 list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator tmp;
 526
 527                                 tmp = iter;
 528                                 ++tmp;
 529
 530                                 (*iter).first->drop_references ();
 531
 532                                 iter = tmp;
 533                         }
 534
 535                         rec_regions.clear();
 536
 537                         // cerr << "\tclear " << rec_rects.size() << " rec rects\n";
 538
 539                         /* transport stopped, clear boxes */
 540                         for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
 541                                 RecBoxInfo &rect = (*iter);
 542                                 delete rect.rectangle;
 543                         }
 544
 545                         rec_rects.clear();
 546
 547                 }
 548         }
 549 }
 550
 551 void
 552 MidiStreamView::update_rec_regions (boost::shared_ptr<MidiModel> data, nframes_t start, nframes_t dur)
 553 {
 554         ENSURE_GUI_THREAD (*this, &MidiStreamView::update_rec_regions, data, start, dur)
 555
 556         if (Config->get_show_waveforms_while_recording ()) {
 557
 558                 uint32_t n = 0;
 559                 bool     update_range = false;
 560
 561                 for (list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator iter = rec_regions.begin();
 562                                 iter != rec_regions.end(); n++) {
 563
 564                         list<pair<boost::shared_ptr<Region>,RegionView*> >::iterator tmp = iter;
 565                         ++tmp;
 566
 567                         if (!canvas_item_visible (rec_rects[n].rectangle)) {
 568                                 /* rect already hidden, this region is done */
 569                                 iter = tmp;
 570                                 continue;
 571                         }
 572
 573                         boost::shared_ptr<MidiRegion> region = boost::dynamic_pointer_cast<MidiRegion>(iter->first);
 574                         if (!region) {
 575                                 iter = tmp;
 576                                 continue;
 577                         }
 578
 579                         nframes_t origlen = region->length();
 580
 581                         if (region == rec_regions.back().first && rec_active) {
 582
 583                                 if (start >= region->midi_source(0)->timeline_position()) {
 584
 585                                         nframes_t nlen = start + dur - region->position();
 586
 587                                         if (nlen != region->length()) {
 588
 589                                                 region->suspend_property_changes ();
 590                                                 region->set_position (_trackview.track()->get_capture_start_frame(n), this);
 591                                                 region->set_length (start + dur - region->position(), this);
 592                                                 region->resume_property_changes ();
 593
 594                                                 if (origlen == 1) {
 595                                                         /* our special initial length */
 596                                                         iter->second = add_region_view_internal (region, false);
 597                                                         ((MidiRegionView*)iter->second)->begin_write();
 598                                                 }
 599
 600                                                 /* also update rect */
 601                                                 ArdourCanvas::SimpleRect * rect = rec_rects[n].rectangle;
 602                                                 gdouble xend = _trackview.editor().frame_to_pixel (region->position() + region->length());
 603                                                 rect->property_x2() = xend;
 604
 605                                                 ARDOUR::BeatsFramesConverter tconv(_trackview.session()->tempo_map(), region->position());
 606                                                 const MidiModel::TimeType start_beats = tconv.from(start);
 607
 608                                                 /* draw events */
 609                                                 MidiRegionView* mrv = (MidiRegionView*)iter->second;
 610
 611                                                 for (MidiModel::Notes::const_iterator i = data->note_lower_bound(start_beats);
 612                                                                 i != data->notes().end(); ++i) {
 613
 614                                                         const boost::shared_ptr<MidiRegionView::NoteType>& note = *i;
 615
 616                                                         nframes_t note_start_frames = tconv.to(note->time());
 617                                                         nframes_t note_end_frames   = tconv.to(note->end_time());
 618
 619                                                         if (note->length() > 0 && note_end_frames + region->position() > start)
 620                                                                 mrv->resolve_note(note->note(), note_end_frames);
 621
 622                                                         if (note_start_frames + region->position() < start) {
 623                                                                 continue;
 624                                                         }
 625
 626                                                         if (note_start_frames + region->position() > start + dur) {
 627                                                                 break;
 628                                                         }
 629
 630                                                         if (note->note() < _lowest_note) {
 631                                                                 _lowest_note = note->note();
 632                                                                 update_range = true;
 633                                                         } else if (note->note() > _highest_note) {
 634                                                                 _highest_note = note->note();
 635                                                                 update_range = true;
 636                                                         }
 637
 638                                                         mrv->add_note (note, !update_range);
 639                                                 }
 640
 641                                                 mrv->extend_active_notes();
 642                                         }
 643                                 }
 644
 645                         } else {
 646
 647                                 nframes_t nlen = _trackview.track()->get_captured_frames(n);
 648
 649                                 if (nlen != region->length()) {
 650
 651                                         if (region->source_length(0) >= region->position() + nlen) {
 652
 653                                                 region->suspend_property_changes ();
 654                                                 region->set_position (_trackview.track()->get_capture_start_frame(n), this);
 655                                                 region->set_length (nlen, this);
 656                                                 region->resume_property_changes ();
 657
 658                                                 if (origlen == 1) {
 659                                                         /* our special initial length */
 660                                                         iter->second = add_region_view_internal (region, false);
 661                                                 }
 662
 663                                                 /* also hide rect */
 664                                                 ArdourCanvas::Item * rect = rec_rects[n].rectangle;
 665                                                 rect->hide();
 666
 667                                         }
 668                                 }
 669                         }
 670
 671                         iter = tmp;
 672                 }
 673
 674                 if (update_range)
 675                         update_contents_height();
 676         }
 677 }
 678
 679 void
 680 MidiStreamView::rec_data_range_ready (nframes_t start, nframes_t cnt, boost::weak_ptr<Source> weak_src)
 681 {
 682         // this is called from the butler thread for now
 683
 684         ENSURE_GUI_THREAD (*this, &MidiStreamView::rec_data_range_ready, start, cnt, weak_src)
 685
 686         boost::shared_ptr<SMFSource> src (boost::dynamic_pointer_cast<SMFSource>(weak_src.lock()));
 687
 688         if (!src) {
 689                 return;
 690         }
 691
 692         if (start + cnt > last_rec_data_frame) {
 693                 last_rec_data_frame = start + cnt;
 694         }
 695
 696         this->update_rec_regions (src->model(), start, cnt);
 697 }
 698
 699 void
 700 MidiStreamView::color_handler ()
 701 {
 702         if (_trackview.is_midi_track()) {
 703                 canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiTrackBase.get();
 704         } else {
 705                 canvas_rect->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiBusBase.get();;
 706         }
 707 }
 708
 709 void
 710 MidiStreamView::note_range_adjustment_changed()
 711 {
 712         double sum = note_range_adjustment.get_value() + note_range_adjustment.get_page_size();
 713         int lowest = (int) floor(note_range_adjustment.get_value());
 714         int highest;
 715
 716         if (sum == _range_sum_cache) {
 717                 //cerr << "cached" << endl;
 718                 highest = (int) floor(sum);
 719         } else {
 720                 //cerr << "recalc" << endl;
 721                 highest = lowest + (int) floor(note_range_adjustment.get_page_size());
 722                 _range_sum_cache = sum;
 723         }
 724
 725         if (lowest == _lowest_note && highest == _highest_note) {
 726                 return;
 727         }
 728
 729         //cerr << "note range adjustment changed: " << lowest << " " << highest << endl;
 730         //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;
 731
 732         _lowest_note = lowest;
 733         _highest_note = highest;
 734         apply_note_range(lowest, highest, true);
 735 }
 736