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, bool watch_death)
 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         if (watch_death) {
 171                 /* catch regionview going away */
 172                 region->GoingAway.connect (bind (mem_fun (*this, &AudioStreamView::remove_region_view), boost::weak_ptr<Region> (r)));
 173         }
 174
 175         RegionViewAdded (region_view);
 176 }
 177
 178 void
 179 AudioStreamView::remove_region_view (boost::weak_ptr<Region> weak_r)
 180 {
 181         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_region_view), weak_r));
 182
 183         boost::shared_ptr<Region> r (weak_r.lock());
 184
 185         if (!r) {
 186                 return;
 187         }
 188
 189         if (!_trackview.session().deletion_in_progress()) {
 190
 191                 for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end();) {
 192                         list<CrossfadeView*>::iterator tmp;
 193
 194                         tmp = i;
 195                         ++tmp;
 196
 197                         boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(r);
 198                         if (ar && (*i)->crossfade.involves (ar)) {
 199                                 delete *i;
 200                                 crossfade_views.erase (i);
 201                         }
 202
 203                         i = tmp;
 204                 }
 205         }
 206
 207         StreamView::remove_region_view(r);
 208 }
 209
 210 void
 211 AudioStreamView::undisplay_diskstream ()
 212 {
 213         StreamView::undisplay_diskstream();
 214
 215         for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 216                 delete *i;
 217         }
 218
 219         crossfade_views.clear ();
 220 }
 221
 222 void
 223 AudioStreamView::playlist_modified ()
 224 {
 225         ENSURE_GUI_THREAD (mem_fun (*this, &AudioStreamView::playlist_modified));
 226
 227         StreamView::playlist_modified();
 228
 229         /* make sure xfades are on top and all the regionviews are stacked correctly. */
 230
 231         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 232                 (*i)->get_canvas_group()->raise_to_top();
 233         }
 234 }
 235
 236 void
 237 AudioStreamView::playlist_changed (boost::shared_ptr<Diskstream> ds)
 238 {
 239         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::playlist_changed), ds));
 240
 241         StreamView::playlist_changed(ds);
 242
 243         AudioPlaylist* apl = dynamic_cast<AudioPlaylist*>(ds->playlist());
 244         if (apl)
 245                 playlist_connections.push_back (apl->NewCrossfade.connect (mem_fun (*this, &AudioStreamView::add_crossfade)));
 246 }
 247
 248 void
 249 AudioStreamView::add_crossfade (Crossfade *crossfade)
 250 {
 251         AudioRegionView* lview = 0;
 252         AudioRegionView* rview = 0;
 253
 254         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::add_crossfade), crossfade));
 255
 256         /* first see if we already have a CrossfadeView for this Crossfade */
 257
 258         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 259                 if (&(*i)->crossfade == crossfade) {
 260                         if (!crossfades_visible) {
 261                                 (*i)->hide();
 262                         } else {
 263                                 (*i)->show ();
 264                         }
 265                         (*i)->set_valid (true);
 266                         return;
 267                 }
 268         }
 269
 270         /* create a new one */
 271
 272         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 273                 AudioRegionView* arv = dynamic_cast<AudioRegionView*>(*i);
 274
 275                 if (!lview && arv && (arv->region() == crossfade->out())) {
 276                         lview = arv;
 277                 }
 278                 if (!rview && arv && (arv->region() == crossfade->in())) {
 279                         rview = arv;
 280                 }
 281         }
 282
 283         CrossfadeView *cv = new CrossfadeView (_trackview.canvas_display,
 284                                                _trackview,
 285                                                *crossfade,
 286                                                _samples_per_unit,
 287                                                region_color,
 288                                                *lview, *rview);
 289
 290         crossfade->Invalidated.connect (mem_fun (*this, &AudioStreamView::remove_crossfade));
 291         crossfade_views.push_back (cv);
 292
 293         if (!crossfades_visible) {
 294                 cv->hide ();
 295         }
 296 }
 297
 298 void
 299 AudioStreamView::remove_crossfade (Crossfade *xfade)
 300 {
 301         ENSURE_GUI_THREAD (bind (mem_fun (*this, &AudioStreamView::remove_crossfade), xfade));
 302
 303         for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 304                 if (&(*i)->crossfade == xfade) {
 305                         delete *i;
 306                         crossfade_views.erase (i);
 307                         break;
 308                 }
 309         }
 310 }
 311
 312 void
 313 AudioStreamView::redisplay_diskstream ()
 314 {
 315         list<RegionView *>::iterator i, tmp;
 316         list<CrossfadeView*>::iterator xi, tmpx;
 317
 318
 319         for (i = region_views.begin(); i != region_views.end(); ++i) {
 320                 (*i)->set_valid (false);
 321         }
 322
 323         for (xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
 324                 (*xi)->set_valid (false);
 325                 if ((*xi)->visible()) {
 326                         (*xi)->show ();
 327                 }
 328         }
 329
 330         if (_trackview.is_audio_track()) {
 331                 _trackview.get_diskstream()->playlist()->foreach_region (static_cast<StreamView*>(this), &StreamView::add_region_view);
 332                 AudioPlaylist* apl = dynamic_cast<AudioPlaylist*>(_trackview.get_diskstream()->playlist());
 333                 if (apl)
 334                         apl->foreach_crossfade (this, &AudioStreamView::add_crossfade);
 335         }
 336
 337         for (i = region_views.begin(); i != region_views.end(); ) {
 338                 tmp = i;
 339                 tmp++;
 340
 341                 if (!(*i)->is_valid()) {
 342                         delete *i;
 343                         region_views.erase (i);
 344                 }
 345
 346                 i = tmp;
 347         }
 348
 349         for (xi = crossfade_views.begin(); xi != crossfade_views.end();) {
 350                 tmpx = xi;
 351                 tmpx++;
 352
 353                 if (!(*xi)->valid()) {
 354                         delete *xi;
 355                         crossfade_views.erase (xi);
 356                 }
 357
 358                 xi = tmpx;
 359         }
 360
 361         /* now fix layering */
 362
 363         playlist_modified ();
 364 }
 365
 366 void
 367 AudioStreamView::set_show_waveforms (bool yn)
 368 {
 369         for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 370                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 371                 if (arv)
 372                         arv->set_waveform_visible (yn);
 373         }
 374 }
 375
 376 void
 377 AudioStreamView::set_waveform_shape (WaveformShape shape)
 378 {
 379         for (RegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 380                 AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
 381                 if (arv)
 382                         arv->set_waveform_shape (shape);
 383         }
 384 }
 385
 386 void
 387 AudioStreamView::setup_rec_box ()
 388 {
 389         // cerr << _trackview.name() << " streamview SRB\n";
 390
 391         if (_trackview.session().transport_rolling()) {
 392
 393                 // cerr << "\trolling\n";
 394
 395                 if (!rec_active &&
 396                     _trackview.session().record_status() == Session::Recording &&
 397                     _trackview.get_diskstream()->record_enabled()) {
 398
 399                         if (_trackview.audio_track()->mode() == Normal && use_rec_regions && rec_regions.size() == rec_rects.size()) {
 400
 401                                 /* add a new region, but don't bother if they set use_rec_regions mid-record */
 402
 403                                 SourceList sources;
 404
 405                                 for (list<sigc::connection>::iterator prc = peak_ready_connections.begin(); prc != peak_ready_connections.end(); ++prc) {
 406                                         (*prc).disconnect();
 407                                 }
 408                                 peak_ready_connections.clear();
 409
 410                                 // FIXME
 411                                 boost::shared_ptr<AudioDiskstream> ads = boost::dynamic_pointer_cast<AudioDiskstream>(_trackview.get_diskstream());
 412                                 assert(ads);
 413
 414                                 for (uint32_t n=0; n < ads->n_channels(); ++n) {
 415                                         boost::shared_ptr<AudioFileSource> src = boost::static_pointer_cast<AudioFileSource> (ads->write_source (n));
 416                                         if (src) {
 417                                                 sources.push_back (src);
 418                                                 peak_ready_connections.push_back (src->PeakRangeReady.connect (bind (mem_fun (*this, &AudioStreamView::rec_peak_range_ready), boost::weak_ptr<Source>(src))));
 419                                         }
 420                                 }
 421
 422                                 // handle multi
 423
 424                                 nframes_t start = 0;
 425                                 if (rec_regions.size() > 0) {
 426                                         start = rec_regions.back()->start() + _trackview.get_diskstream()->get_captured_frames(rec_regions.size()-1);
 427                                 }
 428
 429                                 boost::shared_ptr<AudioRegion> region (boost::dynamic_pointer_cast<AudioRegion>
 430                                                                        (RegionFactory::create (sources, start, 1 , "", 0, (Region::Flag)(Region::DefaultFlags | Region::DoNotSaveState), false)));
 431                                 region->set_position (_trackview.session().transport_frame(), this);
 432
 433                                 rec_regions.push_back (region);
 434                         }
 435
 436                         /* start a new rec box */
 437
 438                         AudioTrack* at;
 439
 440                         at = _trackview.audio_track(); /* we know what it is already */
 441                         boost::shared_ptr<AudioDiskstream> ds = at->audio_diskstream();
 442                         nframes_t frame_pos = ds->current_capture_start ();
 443                         gdouble xstart = _trackview.editor.frame_to_pixel (frame_pos);
 444                         gdouble xend;
 445                         uint32_t fill_color;
 446
 447                         switch (_trackview.audio_track()->mode()) {
 448                         case Normal:
 449                                 xend = xstart;
 450                                 fill_color = color_map[cRecordingRectFill];
 451                                 break;
 452
 453                         case Destructive:
 454                                 xend = xstart + 2;
 455                                 fill_color = color_map[cRecordingRectFill];
 456                                 /* make the recording rect translucent to allow
 457                                    the user to see the peak data coming in, etc.
 458                                 */
 459                                 fill_color = UINT_RGBA_CHANGE_A (fill_color, 120);
 460                                 break;
 461                         }
 462
 463                         ArdourCanvas::SimpleRect * rec_rect = new Gnome::Canvas::SimpleRect (*canvas_group);
 464                         rec_rect->property_x1() = xstart;
 465                         rec_rect->property_y1() = 1.0;
 466                         rec_rect->property_x2() = xend;
 467                         rec_rect->property_y2() = (double) _trackview.height - 1;
 468                         rec_rect->property_outline_color_rgba() = color_map[cRecordingRectOutline];
 469                         rec_rect->property_fill_color_rgba() = fill_color;
 470
 471                         RecBoxInfo recbox;
 472                         recbox.rectangle = rec_rect;
 473                         recbox.start = _trackview.session().transport_frame();
 474                         recbox.length = 0;
 475
 476                         rec_rects.push_back (recbox);
 477
 478                         screen_update_connection.disconnect();
 479                         screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (mem_fun (*this, &AudioStreamView::update_rec_box));
 480                         rec_updating = true;
 481                         rec_active = true;
 482
 483                 } else if (rec_active &&
 484                            (_trackview.session().record_status() != Session::Recording ||
 485                             !_trackview.get_diskstream()->record_enabled())) {
 486
 487                         screen_update_connection.disconnect();
 488                         rec_active = false;
 489                         rec_updating = false;
 490
 491                 }
 492
 493         } else {
 494
 495                 // cerr << "\tNOT rolling, rec_rects = " << rec_rects.size() << " rec_regions = " << rec_regions.size() << endl;
 496
 497                 if (!rec_rects.empty() || !rec_regions.empty()) {
 498
 499                         /* disconnect rapid update */
 500                         screen_update_connection.disconnect();
 501
 502                         for (list<sigc::connection>::iterator prc = peak_ready_connections.begin(); prc != peak_ready_connections.end(); ++prc) {
 503                                 (*prc).disconnect();
 504                         }
 505                         peak_ready_connections.clear();
 506
 507                         rec_updating = false;
 508                         rec_active = false;
 509                         last_rec_peak_frame = 0;
 510
 511                         /* remove temp regions */
 512
 513                         for (list<boost::shared_ptr<Region> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); ++iter) {
 514                                 (*iter)->drop_references ();
 515                         }
 516
 517                         rec_regions.clear();
 518
 519                         // cerr << "\tclear " << rec_rects.size() << " rec rects\n";
 520
 521                         /* transport stopped, clear boxes */
 522                         for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
 523                                 RecBoxInfo &rect = (*iter);
 524                                 delete rect.rectangle;
 525                         }
 526
 527                         rec_rects.clear();
 528
 529                 }
 530         }
 531 }
 532
 533 void
 534 AudioStreamView::foreach_crossfadeview (void (CrossfadeView::*pmf)(void))
 535 {
 536         for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 537                 ((*i)->*pmf) ();
 538         }
 539 }
 540
 541 void
 542 AudioStreamView::rec_peak_range_ready (nframes_t start, nframes_t cnt, boost::weak_ptr<Source> weak_src)
 543 {
 544         ENSURE_GUI_THREAD(bind (mem_fun (*this, &AudioStreamView::rec_peak_range_ready), start, cnt, weak_src));
 545
 546         boost::shared_ptr<Source> src (weak_src.lock());
 547
 548         if (!src) {
 549                 return;
 550         }
 551
 552         // this is called from the peak building thread
 553
 554         if (rec_peak_ready_map.size() == 0 || start+cnt > last_rec_peak_frame) {
 555                 last_rec_peak_frame = start + cnt;
 556         }
 557
 558         rec_peak_ready_map[src] = true;
 559
 560         if (rec_peak_ready_map.size() == _trackview.get_diskstream()->n_channels()) {
 561                 this->update_rec_regions ();
 562                 rec_peak_ready_map.clear();
 563         }
 564 }
 565
 566 void
 567 AudioStreamView::update_rec_regions ()
 568 {
 569         if (use_rec_regions) {
 570
 571                 uint32_t n = 0;
 572
 573                 for (list<boost::shared_ptr<Region> >::iterator iter = rec_regions.begin(); iter != rec_regions.end(); n++) {
 574
 575                         list<boost::shared_ptr<Region> >::iterator tmp;
 576
 577                         tmp = iter;
 578                         ++tmp;
 579
 580                         if (!canvas_item_visible (rec_rects[n].rectangle)) {
 581                                 /* rect already hidden, this region is done */
 582                                 iter = tmp;
 583                                 continue;
 584                         }
 585
 586                         boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion>(*iter);
 587                         if (!region) {
 588                                 continue;
 589                         }
 590
 591                         nframes_t origlen = region->length();
 592
 593                         if (region == rec_regions.back() && rec_active) {
 594
 595                                 if (last_rec_peak_frame > region->start()) {
 596
 597                                         nframes_t nlen = last_rec_peak_frame - region->start();
 598
 599                                         if (nlen != region->length()) {
 600
 601                                                 region->freeze ();
 602                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 603                                                 region->set_length (nlen, this);
 604                                                 region->thaw ("updated");
 605
 606                                                 if (origlen == 1) {
 607                                                         /* our special initial length */
 608                                                         add_region_view_internal (region, false, false);
 609                                                 }
 610
 611                                                 /* also update rect */
 612                                                 ArdourCanvas::SimpleRect * rect = rec_rects[n].rectangle;
 613                                                 gdouble xend = _trackview.editor.frame_to_pixel (region->position() + region->length());
 614                                                 rect->property_x2() = xend;
 615                                         }
 616                                 }
 617
 618                         } else {
 619
 620                                 nframes_t nlen = _trackview.get_diskstream()->get_captured_frames(n);
 621
 622                                 if (nlen != region->length()) {
 623
 624                                         if (region->source(0)->length() >= region->start() + nlen) {
 625
 626                                                 region->freeze ();
 627                                                 region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
 628                                                 region->set_length (nlen, this);
 629                                                 region->thaw ("updated");
 630
 631                                                 if (origlen == 1) {
 632                                                         /* our special initial length */
 633                                                         add_region_view_internal (region, false, false);
 634                                                 }
 635
 636                                                 /* also hide rect */
 637                                                 ArdourCanvas::Item * rect = rec_rects[n].rectangle;
 638                                                 rect->hide();
 639
 640                                         }
 641                                 }
 642                         }
 643
 644                         iter = tmp;
 645                 }
 646         }
 647 }
 648
 649 void
 650 AudioStreamView::show_all_xfades ()
 651 {
 652         foreach_crossfadeview (&CrossfadeView::show);
 653         crossfades_visible = true;
 654 }
 655
 656 void
 657 AudioStreamView::hide_all_xfades ()
 658 {
 659         foreach_crossfadeview (&CrossfadeView::hide);
 660         crossfades_visible = false;
 661 }
 662
 663 void
 664 AudioStreamView::hide_xfades_involving (AudioRegionView& rv)
 665 {
 666         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 667                 if ((*i)->crossfade.involves (rv.audio_region())) {
 668                         (*i)->fake_hide ();
 669                 }
 670         }
 671 }
 672
 673 void
 674 AudioStreamView::reveal_xfades_involving (AudioRegionView& rv)
 675 {
 676         for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
 677                 if ((*i)->crossfade.involves (rv.audio_region()) && (*i)->visible()) {
 678                         (*i)->show ();
 679                 }
 680         }
 681 }
 682
 683 void
 684 AudioStreamView::color_handler (ColorID id, uint32_t val)
 685 {
 686         switch (id) {
 687         case cAudioTrackBase:
 688                 if (_trackview.is_track()) {
 689                         canvas_rect->property_fill_color_rgba() = val;
 690                 }
 691                 break;
 692         case cAudioBusBase:
 693                 if (!_trackview.is_track()) {
 694                         canvas_rect->property_fill_color_rgba() = val;
 695                 }
 696                 break;
 697         case cAudioTrackOutline:
 698                 canvas_rect->property_outline_color_rgba() = val;
 699                 break;
 700
 701         default:
 702                 break;
 703         }
 704 }
 705