gtk2_ardour/audio_streamview.cc

   1 /*
   2     Copyright (C) 2001, 2006 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
  22 #include <gtkmm.h>
  23
  24 #include <gtkmm2ext/gtk_ui.h>
  25
  26 #include <ardour/audioplaylist.h>
  27 #include <ardour/audioregion.h>
  28 #include <ardour/audiofilesource.h>
  29 #include <ardour/audio_diskstream.h>
  30 #include <ardour/audio_track.h>
  31 #include <ardour/playlist_templates.h>
  32 #include <ardour/source.h>
  33 #include <ardour/region_factory.h>
  34
  35 #include "audio_streamview.h"
  36 #include "audio_region_view.h"
  37 #include "tape_region_view.h"
  38 #include "audio_time_axis.h"
  39 #include "canvas-waveview.h"
  40 #include "canvas-simplerect.h"
  41 #include "region_selection.h"
  42 #include "selection.h"
  43 #include "public_editor.h"
  44 #include "ardour_ui.h"
  45 #include "crossfade_view.h"
  46 #include "rgb_macros.h"
  47 #include "gui_thread.h"
  48 #include "utils.h"
  49 #include "color.h"
  50
  51 using namespace ARDOUR;
  52 using namespace PBD;
  53 using namespace Editing;
  54
  55 AudioStreamView::AudioStreamView (AudioTimeAxisView& tv)
  56         : StreamView (tv)
  57 {
  58         crossfades_visible = true;
  59
  60         if (tv.is_audio_track())
  61                 stream_base_color = color_map[cAudioTrackBase];
  62         else
  63                 stream_base_color = color_map[cAudioBusBase];
  64
  65         canvas_rect->property_fill_color_rgba() = stream_base_color;
  66         canvas_rect->property_outline_color_rgba() = color_map[cAudioTrackOutline];
  67
  68         _amplitude_above_axis = 1.0;
  69
  70         use_rec_regions = tv.editor.show_waveforms_recording ();
  71         last_rec_peak_frame = 0;
  72
  73 }
  74
  75 AudioStreamView::~AudioStreamView ()
  76 {
  77 }
  78
  79 int
  80 AudioStreamView::set_height (gdouble h)
  81 {
  82         /* limit the values to something sane-ish */
  83         if (h < 10.0 || h > 1000.0) {
  84                 return -1;
  85         }
  86
  87         StreamView::set_height(h);
  88
  89         for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
  90                 (*i)->set_height (h);
  91         }
  92
  93         return 0;
  94 }
  95
  96 int
  97 AudioStreamView::set_samples_per_unit (gdouble spp)
  98 {
  99         StreamView::set_samples_per_unit(spp);
 100
 101         for (CrossfadeViewList::iterator xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
 102                 (*xi)->set_samples_per_unit (spp);
 103         }
 104
 105         return 0;
 106 }
 107
 108 int
 109 AudioStreamView::set_amplitude_above_axis (gdouble app)
 110 {
 111         RegionViewList::iterator i;
 112
 113         if (app < 1.0) {
 114                 return -1;
 115         }
 116
 117         _amplitude_above_axis = app;
 118
 119         for (i = region_views.begin(); i != region_views.end(); ++i) {
 120                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 121                 if (arv)
 122                         arv->set_amplitude_above_axis (app);
 123         }
 124
 125         return 0;
 126 }
 127
 128 void
 129 AudioStreamView::add_region_view_internal (boost::shared_ptr<Region> r, bool wait_for_waves)
 130 {
 131         AudioRegionView *region_view;
 132
 133         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::add_region_view), r));
 134
 135         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (r);
 136
 137         if (region == 0) {
 138                 return;
 139         }
 140
 141         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 142                 if ((*i)->region() == r) {
 143
 144                         /* great. we already have a AudioRegionView for this Region. use it again. */
 145
 146                         (*i)->set_valid (true);
 147                         return;
 148                 }
 149         }
 150
 151         switch (_trackview.audio_track()->mode()) {
 152         case Normal:
 153                 region_view = new AudioRegionView (canvas_group, _trackview, region,
 154                                                    _samples_per_unit, region_color);
 155                 break;
 156         case Destructive:
 157                 region_view = new TapeAudioRegionView (canvas_group, _trackview, region,
 158                                                        _samples_per_unit, region_color);
 159                 break;
 160         }
 161
 162         region_view->init (region_color, wait_for_waves);
 163         region_view->set_amplitude_above_axis(_amplitude_above_axis);
 164         region_views.push_front (region_view);
 165
 166         /* follow global waveform setting */
 167
 168         region_view->set_waveform_visible(_trackview.editor.show_waveforms());
 169
 170         /* catch regionview going away */
 171
 172         region->GoingAway.connect (bind (mem_fun (*this, &AudioStreamView::remove_region_view), boost::weak_ptr<Region> (r)));
 173
 174         RegionViewAdded (region_view);
 175 }
 176
 177 void
 178 AudioStreamView::remove_region_view (boost::weak_ptr<Region> weak_r)
 179 {
 180         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_region_view), weak_r));
 181
 182         boost::shared_ptr<Region> r (weak_r.lock());
 183
 184         if (!r) {
 185                 return;
 186         }
 187
 188         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end();) {
 189                 list<CrossfadeView*>::iterator tmp;
 190
 191                 tmp = i;
 192                 ++tmp;
 193
 194                 boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(r);
 195                 if (ar && (*i)->crossfade.involves (ar)) {
 196                         delete *i;
 197                         crossfade_views.erase (i);
 198                 }
 199
 200                 i = tmp;
 201         }
 202
 203         StreamView::remove_region_view(r);
 204 }
 205
 206 void
 207 AudioStreamView::undisplay_diskstream ()
 208 {
 209         StreamView::undisplay_diskstream();
 210
 211         for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 212                 delete *i;
 213         }
 214
 215         crossfade_views.clear ();
 216 }
 217
 218 void
 219 AudioStreamView::playlist_modified ()
 220 {
 221         ENSURE_GUI_THREAD (mem_fun (*this, &AudioStreamView::playlist_modified));
 222
 223         StreamView::playlist_modified();
 224
 225         /* make sure xfades are on top and all the regionviews are stacked correctly. */
 226
 227         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 228                 (*i)->get_canvas_group()->raise_to_top();
 229         }
 230 }
 231
 232 void
 233 AudioStreamView::playlist_changed (boost::shared_ptr<Diskstream> ds)
 234 {
 235         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::playlist_changed), ds));
 236
 237         StreamView::playlist_changed(ds);
 238
 239         AudioPlaylist* apl = dynamic_cast<AudioPlaylist*>(ds->playlist());
 240         if (apl)
 241                 playlist_connections.push_back (apl->NewCrossfade.connect (mem_fun (*this, &AudioStreamView::add_crossfade)));
 242 }
 243
 244 void
 245 AudioStreamView::add_crossfade (Crossfade *crossfade)
 246 {
 247         AudioRegionView* lview = 0;
 248         AudioRegionView* rview = 0;
 249
 250         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::add_crossfade), crossfade));
 251
 252         /* first see if we already have a CrossfadeView for this Crossfade */
 253
 254         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 255                 if (&(*i)->crossfade == crossfade) {
 256                         if (!crossfades_visible) {
 257                                 (*i)->hide();
 258                         } else {
 259                                 (*i)->show ();
 260                         }
 261                         (*i)->set_valid (true);
 262                         return;
 263                 }
 264         }
 265
 266         /* create a new one */
 267
 268         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 269                 AudioRegionView* arv = dynamic_cast<AudioRegionView*>(*i);
 270
 271                 if (!lview && arv && (arv->region() == crossfade->out())) {
 272                         lview = arv;
 273                 }
 274                 if (!rview && arv && (arv->region() == crossfade->in())) {
 275                         rview = arv;
 276                 }
 277         }
 278
 279         CrossfadeView *cv = new CrossfadeView (_trackview.canvas_display,
 280                                                _trackview,
 281                                                *crossfade,
 282                                                _samples_per_unit,
 283                                                region_color,
 284                                                *lview, *rview);
 285
 286         crossfade->Invalidated.connect (mem_fun (*this, &AudioStreamView::remove_crossfade));
 287         crossfade_views.push_back (cv);
 288
 289         if (!crossfades_visible) {
 290                 cv->hide ();
 291         }
 292 }
 293
 294 void
 295 AudioStreamView::remove_crossfade (Crossfade *xfade)
 296 {
 297         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_crossfade), xfade));
 298
 299         for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 300                 if (&(*i)->crossfade == xfade) {
 301                         delete *i;
 302                         crossfade_views.erase (i);
 303                         break;
 304                 }
 305         }
 306 }
 307
 308 void
 309 AudioStreamView::redisplay_diskstream ()
 310 {
 311         list<RegionView *>::iterator i, tmp;
 312         list<CrossfadeView*>::iterator xi, tmpx;
 313
 314
 315         for (i = region_views.begin(); i != region_views.end(); ++i) {
 316                 (*i)->set_valid (false);
 317         }
 318
 319         for (xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
 320                 (*xi)->set_valid (false);
 321                 if ((*xi)->visible()) {
 322                         (*xi)->show ();
 323                 }
 324         }
 325
 326         if (_trackview.is_audio_track()) {
 327                 _trackview.get_diskstream()->playlist()->foreach_region (static_cast<StreamView*>(this), &StreamView::add_region_view);
 328                 AudioPlaylist* apl = dynamic_cast<AudioPlaylist*>(_trackview.get_diskstream()->playlist());
 329                 if (apl)
 330                         apl->foreach_crossfade (this, &AudioStreamView::add_crossfade);
 331         }
 332
 333         for (i = region_views.begin(); i != region_views.end(); ) {
 334                 tmp = i;
 335                 tmp++;
 336
 337                 if (!(*i)->is_valid()) {
 338                         delete *i;
 339                         region_views.erase (i);
 340                 }
 341
 342                 i = tmp;
 343         }
 344
 345         for (xi = crossfade_views.begin(); xi != crossfade_views.end();) {
 346                 tmpx = xi;
 347                 tmpx++;
 348
 349                 if (!(*xi)->valid()) {
 350                         delete *xi;
 351                         crossfade_views.erase (xi);
 352                 }
 353
 354                 xi = tmpx;
 355         }
 356
 357         /* now fix layering */
 358
 359         playlist_modified ();
 360 }
 361
 362 void
 363 AudioStreamView::set_show_waveforms (bool yn)
 364 {
 365         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 366                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 367                 if (arv)
 368                         arv->set_waveform_visible (yn);
 369         }
 370 }
 371
 372 void
 373 AudioStreamView::set_waveform_shape (WaveformShape shape)
 374 {
 375         for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 376                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 377                 if (arv)
 378                         arv->set_waveform_shape (shape);
 379         }
 380 }
 381
 382 void
 383 AudioStreamView::setup_rec_box ()
 384 {
 385         // cerr << _trackview.name() << " streamview SRB\n";
 386
 387         if (_trackview.session().transport_rolling()) {
 388
 389                 // cerr << "\trolling\n";
 390
 391                 if (!rec_active &&
 392                     _trackview.session().record_status() == Session::Recording &&
 393                     _trackview.get_diskstream()->record_enabled()) {
 394
 395                         if (_trackview.audio_track()->mode() == Normal && use_rec_regions && rec_regions.size() == rec_rects.size()) {
 396
 397                                 /* add a new region, but don't bother if they set use_rec_regions mid-record */
 398
 399                                 SourceList sources;
 400
 401                                 for (list<sigc::connection>::iterator prc = peak_ready_connections.begin(); prc != peak_ready_connections.end(); ++prc) {
 402                                         (*prc).disconnect();
 403                                 }
 404                                 peak_ready_connections.clear();
 405
 406                                 // FIXME
 407                                 boost::shared_ptr<AudioDiskstream> ads = boost::dynamic_pointer_cast<AudioDiskstream>(_trackview.get_diskstream());
 408                                 assert(ads);
 409
 410                                 for (uint32_t n=0; n < ads->n_channels(); ++n) {
 411                                         boost::shared_ptr<AudioFileSource> src = boost::static_pointer_cast<AudioFileSource> (ads->write_source (n));
 412                                         if (src) {
 413                                                 sources.push_back (src);
 414                                                 peak_ready_connections.push_back (src->PeakRangeReady.connect (bind (mem_fun (*this, &AudioStreamView::rec_peak_range_ready), boost::weak_ptr<Source>(src))));
 415                                         }
 416                                 }
 417
 418                                 // handle multi
 419
 420                                 nframes_t start = 0;
 421                                 if (rec_regions.size() > 0) {
 422                                         start = rec_regions.back()->start() + _trackview.get_diskstream()->get_captured_frames(rec_regions.size()-1);
 423                                 }
 424
 425                                 boost::shared_ptr<AudioRegion> region (boost::dynamic_pointer_cast<AudioRegion>
 426                                                                        (RegionFactory::create (sources, start, 1 , "", 0, (Region::Flag)(Region::DefaultFlags | Region::DoNotSaveState), false)));
 427                                 region->set_position (_trackview.session().transport_frame(), this);
 428
 429                                 rec_regions.push_back (region);
 430                         }
 431
 432                         /* start a new rec box */
 433
 434                         AudioTrack* at;
 435
 436                         at = _trackview.audio_track(); /* we know what it is already */
 437                         boost::shared_ptr<AudioDiskstream> ds = at->audio_diskstream();
 438                         nframes_t frame_pos = ds->current_capture_start ();
 439                         gdouble xstart = _trackview.editor.frame_to_pixel (frame_pos);
 440                         gdouble xend;
 441                         uint32_t fill_color;
 442
 443                         switch (_trackview.audio_track()->mode()) {
 444                         case Normal:
 445                                 xend = xstart;
 446                                 fill_color = color_map[cRecordingRectFill];
 447                                 break;
 448
 449                         case Destructive:
 450                                 xend = xstart + 2;
 451                                 fill_color = color_map[cRecordingRectFill];
 452                                 /* make the recording rect translucent to allow
 453                                    the user to see the peak data coming in, etc.
 454                                 */
 455                                 fill_color = UINT_RGBA_CHANGE_A (fill_color, 120);
 456                                 break;
 457                         }
 458
 459                         ArdourCanvas::SimpleRect * rec_rect = new Gnome::Canvas::SimpleRect (*canvas_group);
 460                         rec_rect->property_x1() = xstart;
 461                         rec_rect->property_y1() = 1.0;
 462                         rec_rect->property_x2() = xend;
 463                         rec_rect->property_y2() = (double) _trackview.height - 1;
 464                         rec_rect->property_outline_color_rgba() = color_map[cRecordingRectOutline];
 465                         rec_rect->property_fill_color_rgba() = fill_color;
 466
 467                         RecBoxInfo recbox;
 468                         recbox.rectangle = rec_rect;
 469                         recbox.start = _trackview.session().transport_frame();
 470                         recbox.length = 0;
 471
 472                         rec_rects.push_back (recbox);
 473
 474                         screen_update_connection.disconnect();
 475                         screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (mem_fun (*this, &AudioStreamView::update_rec_box));
 476                         rec_updating = true;
 477                         rec_active = true;
 478
 479                 } else if (rec_active &&
 480                            (_trackview.session().record_status() != Session::Recording ||
 481                             !_trackview.get_diskstream()->record_enabled())) {
 482
 483                         screen_update_connection.disconnect();
 484                         rec_active = false;
 485                         rec_updating = false;
 486
 487                 }
 488
 489         } else {
 490
 491                 // cerr << "\tNOT rolling, rec_rects = " << rec_rects.size() << " rec_regions = " << rec_regions.size() << endl;
 492
 493                 if (!rec_rects.empty() || !rec_regions.empty()) {
 494
 495                         /* disconnect rapid update */
 496                         screen_update_connection.disconnect();
 497
 498                         for (list<sigc::connection>::iterator prc = peak_ready_connections.begin(); prc != peak_ready_connections.end(); ++prc) {
 499                                 (*prc).disconnect();
 500                         }
 501                         peak_ready_connections.clear();
 502
 503                         rec_updating = false;
 504                         rec_active = false;
 505                         last_rec_peak_frame = 0;
 506
 507                         /* remove temp regions */
 508
 509                         for (list<boost::shared_ptr<Region> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); ++iter) {
 510                                 (*iter)->drop_references ();
 511                         }
 512
 513                         rec_regions.clear();
 514
 515                         // cerr << "\tclear " << rec_rects.size() << " rec rects\n";
 516
 517                         /* transport stopped, clear boxes */
 518                         for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
 519                                 RecBoxInfo &rect = (*iter);
 520                                 delete rect.rectangle;
 521                         }
 522
 523                         rec_rects.clear();
 524
 525                 }
 526         }
 527 }
 528
 529 void
 530 AudioStreamView::foreach_crossfadeview (void (CrossfadeView::*pmf)(void))
 531 {
 532         for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 533                 ((*i)->*pmf) ();
 534         }
 535 }
 536
 537 void
 538 AudioStreamView::rec_peak_range_ready (nframes_t start, nframes_t cnt, boost::weak_ptr<Source> weak_src)
 539 {
 540         ENSURE_GUI_THREAD(bind (mem_fun (*this, &AudioStreamView::rec_peak_range_ready), start, cnt, weak_src));
 541
 542         boost::shared_ptr<Source> src (weak_src.lock());
 543
 544         if (!src) {
 545                 return;
 546         }
 547
 548         // this is called from the peak building thread
 549
 550         if (rec_peak_ready_map.size() == 0 || start+cnt > last_rec_peak_frame) {
 551                 last_rec_peak_frame = start + cnt;
 552         }
 553
 554         rec_peak_ready_map[src] = true;
 555
 556         if (rec_peak_ready_map.size() == _trackview.get_diskstream()->n_channels()) {
 557                 this->update_rec_regions ();
 558                 rec_peak_ready_map.clear();
 559         }
 560 }
 561
 562 void
 563 AudioStreamView::update_rec_regions ()
 564 {
 565         if (use_rec_regions) {
 566
 567                 uint32_t n = 0;
 568
 569                 for (list<boost::shared_ptr<Region> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); n++) {
 570
 571                         list<boost::shared_ptr<Region> >::iterator tmp;
 572
 573                         tmp = iter;
 574                         ++tmp;
 575
 576                         if (!canvas_item_visible (rec_rects[n].rectangle)) {
 577                                 /* rect already hidden, this region is done */
 578                                 iter = tmp;
 579                                 continue;
 580                         }
 581
 582                         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion>(*iter);
 583                         if (!region) {
 584                                 continue;
 585                         }
 586
 587                         nframes_t origlen = region->length();
 588
 589                         if (region == rec_regions.back() && rec_active) {
 590
 591                                 if (last_rec_peak_frame > region->start()) {
 592
 593                                         nframes_t nlen = last_rec_peak_frame - region->start();
 594
 595                                         if (nlen != region->length()) {
 596
 597                                                 region->freeze ();
 598                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 599                                                 region->set_length (nlen, this);
 600                                                 region->thaw ("updated");
 601
 602                                                 if (origlen == 1) {
 603                                                         /* our special initial length */
 604                                                         add_region_view_internal (region, false);
 605                                                 }
 606
 607                                                 /* also update rect */
 608                                                 ArdourCanvas::SimpleRect * rect = rec_rects[n].rectangle;
 609                                                 gdouble xend = _trackview.editor.frame_to_pixel (region->position() + region->length());
 610                                                 rect->property_x2() = xend;
 611                                         }
 612                                 }
 613
 614                         } else {
 615
 616                                 nframes_t nlen = _trackview.get_diskstream()->get_captured_frames(n);
 617
 618                                 if (nlen != region->length()) {
 619
 620                                         if (region->source(0)->length() >= region->start() + nlen) {
 621
 622                                                 region->freeze ();
 623                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 624                                                 region->set_length (nlen, this);
 625                                                 region->thaw ("updated");
 626
 627                                                 if (origlen == 1) {
 628                                                         /* our special initial length */
 629                                                         add_region_view_internal (region, false);
 630                                                 }
 631
 632                                                 /* also hide rect */
 633                                                 ArdourCanvas::Item * rect = rec_rects[n].rectangle;
 634                                                 rect->hide();
 635
 636                                         }
 637                                 }
 638                         }
 639
 640                         iter = tmp;
 641                 }
 642         }
 643 }
 644
 645 void
 646 AudioStreamView::show_all_xfades ()
 647 {
 648         foreach_crossfadeview (&CrossfadeView::show);
 649         crossfades_visible = true;
 650 }
 651
 652 void
 653 AudioStreamView::hide_all_xfades ()
 654 {
 655         foreach_crossfadeview (&CrossfadeView::hide);
 656         crossfades_visible = false;
 657 }
 658
 659 void
 660 AudioStreamView::hide_xfades_involving (AudioRegionView& rv)
 661 {
 662         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 663                 if ((*i)->crossfade.involves (rv.audio_region())) {
 664                         (*i)->fake_hide ();
 665                 }
 666         }
 667 }
 668
 669 void
 670 AudioStreamView::reveal_xfades_involving (AudioRegionView& rv)
 671 {
 672         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 673                 if ((*i)->crossfade.involves (rv.audio_region()) && (*i)->visible()) {
 674                         (*i)->show ();
 675                 }
 676         }
 677 }
 678
 679 void
 680 AudioStreamView::color_handler (ColorID id, uint32_t val)
 681 {
 682         switch (id) {
 683         case cAudioTrackBase:
 684                 if (_trackview.is_track()) {
 685                         canvas_rect->property_fill_color_rgba() = val;
 686                 }
 687                 break;
 688         case cAudioBusBase:
 689                 if (!_trackview.is_track()) {
 690                         canvas_rect->property_fill_color_rgba() = val;
 691                 }
 692                 break;
 693         case cAudioTrackOutline:
 694                 canvas_rect->property_outline_color_rgba() = val;
 695                 break;
 696
 697         default:
 698                 break;
 699         }
 700 }
 701