src/wx/timeline.cc

   1 /*
   2     Copyright (C) 2013-2018 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #include "film_editor.h"
  22 #include "timeline.h"
  23 #include "timeline_time_axis_view.h"
  24 #include "timeline_reels_view.h"
  25 #include "timeline_labels_view.h"
  26 #include "timeline_video_content_view.h"
  27 #include "timeline_audio_content_view.h"
  28 #include "timeline_subtitle_content_view.h"
  29 #include "timeline_atmos_content_view.h"
  30 #include "content_panel.h"
  31 #include "wx_util.h"
  32 #include "lib/film.h"
  33 #include "lib/playlist.h"
  34 #include "lib/image_content.h"
  35 #include "lib/timer.h"
  36 #include "lib/audio_content.h"
  37 #include "lib/subtitle_content.h"
  38 #include "lib/video_content.h"
  39 #include "lib/atmos_mxf_content.h"
  40 #include <wx/graphics.h>
  41 #include <boost/weak_ptr.hpp>
  42 #include <boost/foreach.hpp>
  43 #include <list>
  44 #include <iostream>
  45
  46 using std::list;
  47 using std::cout;
  48 using std::min;
  49 using std::max;
  50 using boost::shared_ptr;
  51 using boost::weak_ptr;
  52 using boost::dynamic_pointer_cast;
  53 using boost::bind;
  54 using boost::optional;
  55
  56 Timeline::Timeline (wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film)
  57         : wxScrolledCanvas (parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE)
  58         , _content_panel (cp)
  59         , _film (film)
  60         , _time_axis_view (new TimelineTimeAxisView (*this, 64))
  61         , _reels_view (new TimelineReelsView (*this, 32))
  62         , _labels_view (new TimelineLabelsView (*this))
  63         , _tracks (0)
  64         , _left_down (false)
  65         , _down_view_position (0)
  66         , _first_move (false)
  67         , _menu (this)
  68         , _snap (true)
  69         , _tool (SELECT)
  70         , _x_scroll_rate (16)
  71         , _y_scroll_rate (16)
  72 {
  73 #ifndef __WXOSX__
  74         SetDoubleBuffered (true);
  75 #endif
  76
  77         Bind (wxEVT_PAINT,      boost::bind (&Timeline::paint,       this));
  78         Bind (wxEVT_LEFT_DOWN,  boost::bind (&Timeline::left_down,   this, _1));
  79         Bind (wxEVT_LEFT_UP,    boost::bind (&Timeline::left_up,     this, _1));
  80         Bind (wxEVT_RIGHT_DOWN, boost::bind (&Timeline::right_down,  this, _1));
  81         Bind (wxEVT_MOTION,     boost::bind (&Timeline::mouse_moved, this, _1));
  82         Bind (wxEVT_SIZE,       boost::bind (&Timeline::resized,     this));
  83
  84         film_changed (Film::CONTENT);
  85
  86         SetMinSize (wxSize (640, 4 * track_height() + 96));
  87
  88         _tracks_position = Position<int> (_labels_view->bbox().width, 32);
  89
  90         _film_changed_connection = film->Changed.connect (bind (&Timeline::film_changed, this, _1));
  91         _film_content_changed_connection = film->ContentChanged.connect (bind (&Timeline::film_content_changed, this, _2, _3));
  92
  93         _pixels_per_second = max (0.01, static_cast<double>(640 - tracks_position().x * 2) / film->length().seconds ());
  94
  95         setup_scrollbars ();
  96         EnableScrolling (true, true);
  97 }
  98
  99 void
 100 Timeline::paint ()
 101 {
 102         wxPaintDC dc (this);
 103         DoPrepareDC (dc);
 104
 105         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 106         if (!gc) {
 107                 return;
 108         }
 109
 110         int vsx, vsy;
 111         GetViewStart (&vsx, &vsy);
 112         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate);
 113
 114         gc->SetAntialiasMode (wxANTIALIAS_DEFAULT);
 115
 116         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 117
 118                 shared_ptr<TimelineContentView> ic = dynamic_pointer_cast<TimelineContentView> (i);
 119
 120                 /* Find areas of overlap with other content views, so that we can plot them */
 121                 list<dcpomatic::Rect<int> > overlaps;
 122                 BOOST_FOREACH (shared_ptr<TimelineView> j, _views) {
 123                         shared_ptr<TimelineContentView> jc = dynamic_pointer_cast<TimelineContentView> (j);
 124                         /* No overlap with non-content views, views no different tracks, audio views or non-active views */
 125                         if (!ic || !jc || i == j || ic->track() != jc->track() || ic->track().get_value_or(2) >= 2 || !ic->active() || !jc->active()) {
 126                                 continue;
 127                         }
 128
 129                         optional<dcpomatic::Rect<int> > r = j->bbox().intersection (i->bbox());
 130                         if (r) {
 131                                 overlaps.push_back (r.get ());
 132                         }
 133                 }
 134
 135                 i->paint (gc, overlaps);
 136         }
 137
 138         if (_zoom_point) {
 139                 /* Translate back as _down_point and _zoom_point do not take scroll into account */
 140                 gc->Translate (vsx * _x_scroll_rate, vsy * _y_scroll_rate);
 141                 gc->SetPen (*wxBLACK_PEN);
 142                 gc->SetBrush (*wxTRANSPARENT_BRUSH);
 143                 gc->DrawRectangle (
 144                         min (_down_point.x, _zoom_point->x),
 145                         min (_down_point.y, _zoom_point->y),
 146                         fabs (_down_point.x - _zoom_point->x),
 147                         fabs (_down_point.y - _zoom_point->y)
 148                         );
 149         }
 150
 151         delete gc;
 152 }
 153
 154 void
 155 Timeline::film_changed (Film::Property p)
 156 {
 157         if (p == Film::CONTENT || p == Film::REEL_TYPE || p == Film::REEL_LENGTH) {
 158                 ensure_ui_thread ();
 159                 recreate_views ();
 160         } else if (p == Film::CONTENT_ORDER) {
 161                 Refresh ();
 162         }
 163 }
 164
 165 void
 166 Timeline::recreate_views ()
 167 {
 168         shared_ptr<const Film> film = _film.lock ();
 169         if (!film) {
 170                 return;
 171         }
 172
 173         _views.clear ();
 174         _views.push_back (_time_axis_view);
 175         _views.push_back (_reels_view);
 176         _views.push_back (_labels_view);
 177
 178         BOOST_FOREACH (shared_ptr<Content> i, film->content ()) {
 179                 if (i->video) {
 180                         _views.push_back (shared_ptr<TimelineView> (new TimelineVideoContentView (*this, i)));
 181                 }
 182
 183                 if (i->audio && !i->audio->mapping().mapped_output_channels().empty ()) {
 184                         _views.push_back (shared_ptr<TimelineView> (new TimelineAudioContentView (*this, i)));
 185                 }
 186
 187                 if (i->subtitle) {
 188                         _views.push_back (shared_ptr<TimelineView> (new TimelineSubtitleContentView (*this, i)));
 189                 }
 190
 191                 if (dynamic_pointer_cast<AtmosMXFContent> (i)) {
 192                         _views.push_back (shared_ptr<TimelineView> (new TimelineAtmosContentView (*this, i)));
 193                 }
 194         }
 195
 196         assign_tracks ();
 197         setup_scrollbars ();
 198         Refresh ();
 199 }
 200
 201 void
 202 Timeline::film_content_changed (int property, bool frequent)
 203 {
 204         ensure_ui_thread ();
 205
 206         if (property == AudioContentProperty::STREAMS) {
 207                 recreate_views ();
 208         } else if (!frequent) {
 209                 setup_scrollbars ();
 210                 Refresh ();
 211         }
 212 }
 213
 214 template <class T>
 215 int
 216 place (TimelineViewList& views, int& tracks)
 217 {
 218         int const base = tracks;
 219
 220         BOOST_FOREACH (shared_ptr<TimelineView> i, views) {
 221                 if (!dynamic_pointer_cast<T>(i)) {
 222                         continue;
 223                 }
 224
 225                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (i);
 226
 227                 int t = base;
 228
 229                 shared_ptr<Content> content = cv->content();
 230                 DCPTimePeriod const content_period (content->position(), content->end());
 231
 232                 while (true) {
 233                         TimelineViewList::iterator j = views.begin();
 234                         while (j != views.end()) {
 235                                 shared_ptr<T> test = dynamic_pointer_cast<T> (*j);
 236                                 if (!test) {
 237                                         ++j;
 238                                         continue;
 239                                 }
 240
 241                                 shared_ptr<Content> test_content = test->content();
 242                                 if (
 243                                         test->track() && test->track().get() == t &&
 244                                         content_period.overlap(DCPTimePeriod(test_content->position(), test_content->end()))) {
 245                                         /* we have an overlap on track `t' */
 246                                         ++t;
 247                                         break;
 248                                 }
 249
 250                                 ++j;
 251                         }
 252
 253                         if (j == views.end ()) {
 254                                 /* no overlap on `t' */
 255                                 break;
 256                         }
 257                 }
 258
 259                 cv->set_track (t);
 260                 tracks = max (tracks, t + 1);
 261         }
 262
 263         return tracks - base;
 264 }
 265
 266 void
 267 Timeline::assign_tracks ()
 268 {
 269         /* Tracks are:
 270            Video (mono or left-eye)
 271            Video (right-eye)
 272            Subtitle 1
 273            Subtitle 2
 274            Subtitle N
 275            Atmos
 276            Audio 1
 277            Audio 2
 278            Audio N
 279         */
 280
 281         _tracks = 0;
 282
 283         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 284                 shared_ptr<TimelineContentView> c = dynamic_pointer_cast<TimelineContentView> (*i);
 285                 if (c) {
 286                         c->unset_track ();
 287                 }
 288         }
 289
 290         /* Video */
 291
 292         bool have_3d = false;
 293         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 294                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 295                 if (!cv) {
 296                         continue;
 297                 }
 298
 299                 /* Video on tracks 0 and maybe 1 (left and right eye) */
 300                 if (cv->content()->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
 301                         cv->set_track (1);
 302                         _tracks = max (_tracks, 2);
 303                         have_3d = true;
 304                 } else {
 305                         cv->set_track (0);
 306                 }
 307         }
 308
 309         _tracks = max (_tracks, 1);
 310
 311         /* Subtitle */
 312
 313         int const subtitle_tracks = place<TimelineSubtitleContentView> (_views, _tracks);
 314
 315         /* Atmos */
 316
 317         bool have_atmos = false;
 318         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 319                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 320                 if (!cv) {
 321                         continue;
 322                 }
 323                 if (dynamic_pointer_cast<TimelineAtmosContentView> (i)) {
 324                         cv->set_track (_tracks - 1);
 325                         have_atmos = true;
 326                 }
 327         }
 328
 329         if (have_atmos) {
 330                 ++_tracks;
 331         }
 332
 333         /* Audio */
 334
 335         place<TimelineAudioContentView> (_views, _tracks);
 336
 337         _labels_view->set_3d (have_3d);
 338         _labels_view->set_subtitle_tracks (subtitle_tracks);
 339         _labels_view->set_atmos (have_atmos);
 340
 341         _time_axis_view->set_y (tracks() * track_height() + 64);
 342         _reels_view->set_y (8);
 343 }
 344
 345 int
 346 Timeline::tracks () const
 347 {
 348         return _tracks;
 349 }
 350
 351 void
 352 Timeline::setup_scrollbars ()
 353 {
 354         shared_ptr<const Film> film = _film.lock ();
 355         if (!film || !_pixels_per_second) {
 356                 return;
 357         }
 358         SetVirtualSize (*_pixels_per_second * film->length().seconds(), tracks() * track_height() + 96);
 359         SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 360 }
 361
 362 shared_ptr<TimelineView>
 363 Timeline::event_to_view (wxMouseEvent& ev)
 364 {
 365         /* Search backwards through views so that we find the uppermost one first */
 366         TimelineViewList::reverse_iterator i = _views.rbegin();
 367         Position<int> const p (ev.GetX(), ev.GetY());
 368         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 369                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 370                 ++i;
 371         }
 372
 373         if (i == _views.rend ()) {
 374                 return shared_ptr<TimelineView> ();
 375         }
 376
 377         return *i;
 378 }
 379
 380 void
 381 Timeline::left_down (wxMouseEvent& ev)
 382 {
 383         _left_down = true;
 384         _down_point = ev.GetPosition ();
 385
 386         switch (_tool) {
 387         case SELECT:
 388                 left_down_select (ev);
 389                 break;
 390         case ZOOM:
 391                 /* Nothing to do */
 392                 break;
 393         }
 394 }
 395
 396 void
 397 Timeline::left_down_select (wxMouseEvent& ev)
 398 {
 399         shared_ptr<TimelineView> view = event_to_view (ev);
 400         shared_ptr<TimelineContentView> content_view = dynamic_pointer_cast<TimelineContentView> (view);
 401
 402         _down_view.reset ();
 403
 404         if (content_view) {
 405                 _down_view = content_view;
 406                 _down_view_position = content_view->content()->position ();
 407         }
 408
 409         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 410                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 411                 if (!cv) {
 412                         continue;
 413                 }
 414
 415                 if (!ev.ShiftDown ()) {
 416                         cv->set_selected (view == *i);
 417                 }
 418         }
 419
 420         if (content_view && ev.ShiftDown ()) {
 421                 content_view->set_selected (!content_view->selected ());
 422         }
 423
 424         _first_move = false;
 425
 426         if (_down_view) {
 427                 /* Pre-compute the points that we might snap to */
 428                 for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 429                         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 430                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 431                                 continue;
 432                         }
 433
 434                         _start_snaps.push_back (cv->content()->position());
 435                         _end_snaps.push_back (cv->content()->position());
 436                         _start_snaps.push_back (cv->content()->end());
 437                         _end_snaps.push_back (cv->content()->end());
 438
 439                         BOOST_FOREACH (DCPTime i, cv->content()->reel_split_points()) {
 440                                 _start_snaps.push_back (i);
 441                         }
 442                 }
 443
 444                 /* Tell everyone that things might change frequently during the drag */
 445                 _down_view->content()->set_change_signals_frequent (true);
 446         }
 447 }
 448
 449 void
 450 Timeline::left_up (wxMouseEvent& ev)
 451 {
 452         _left_down = false;
 453
 454         switch (_tool) {
 455         case SELECT:
 456                 left_up_select (ev);
 457                 break;
 458         case ZOOM:
 459                 left_up_zoom (ev);
 460                 break;
 461         }
 462 }
 463
 464 void
 465 Timeline::left_up_select (wxMouseEvent& ev)
 466 {
 467         if (_down_view) {
 468                 _down_view->content()->set_change_signals_frequent (false);
 469         }
 470
 471         _content_panel->set_selection (selected_content ());
 472         set_position_from_event (ev);
 473
 474         /* Clear up up the stuff we don't do during drag */
 475         assign_tracks ();
 476         setup_scrollbars ();
 477         Refresh ();
 478
 479         _start_snaps.clear ();
 480         _end_snaps.clear ();
 481 }
 482
 483 void
 484 Timeline::left_up_zoom (wxMouseEvent& ev)
 485 {
 486         _zoom_point = ev.GetPosition ();
 487
 488         int vsx, vsy;
 489         GetViewStart (&vsx, &vsy);
 490
 491         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 492         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 493
 494         DCPTime time_left = DCPTime::from_seconds((top_left.x + vsx - _tracks_position.x) / *_pixels_per_second);
 495         DCPTime time_right = DCPTime::from_seconds((bottom_right.x + vsx - _tracks_position.x) / *_pixels_per_second);
 496         _pixels_per_second = GetSize().GetWidth() / (time_right.seconds() - time_left.seconds());
 497         cout << "Zoom range " << to_string(time_left) << " " << to_string(time_right) << " " << *_pixels_per_second << "\n";
 498         setup_scrollbars ();
 499         Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, wxDefaultCoord);
 500         cout << "Offset " << (time_left.seconds() * *_pixels_per_second / _x_scroll_rate) << "\n";
 501
 502         _zoom_point = optional<wxPoint> ();
 503         Refresh ();
 504 }
 505
 506 void
 507 Timeline::mouse_moved (wxMouseEvent& ev)
 508 {
 509         switch (_tool) {
 510         case SELECT:
 511                 mouse_moved_select (ev);
 512                 break;
 513         case ZOOM:
 514                 mouse_moved_zoom (ev);
 515                 break;
 516         }
 517 }
 518
 519 void
 520 Timeline::mouse_moved_select (wxMouseEvent& ev)
 521 {
 522         if (!_left_down) {
 523                 return;
 524         }
 525
 526         set_position_from_event (ev);
 527 }
 528
 529 void
 530 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 531 {
 532         if (!_left_down) {
 533                 return;
 534         }
 535
 536         _zoom_point = ev.GetPosition ();
 537         Refresh ();
 538 }
 539
 540 void
 541 Timeline::right_down (wxMouseEvent& ev)
 542 {
 543         switch (_tool) {
 544         case SELECT:
 545                 right_down_select (ev);
 546                 break;
 547         case ZOOM:
 548                 /* Zoom out */
 549                 _pixels_per_second = *_pixels_per_second / 2;
 550                 setup_scrollbars ();
 551                 break;
 552         }
 553 }
 554
 555 void
 556 Timeline::right_down_select (wxMouseEvent& ev)
 557 {
 558         shared_ptr<TimelineView> view = event_to_view (ev);
 559         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (view);
 560         if (!cv) {
 561                 return;
 562         }
 563
 564         if (!cv->selected ()) {
 565                 clear_selection ();
 566                 cv->set_selected (true);
 567         }
 568
 569         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 570 }
 571
 572 void
 573 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 574 {
 575         DCPTime const d = a - b;
 576         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 577                 nearest_distance = d;
 578         }
 579 }
 580
 581 void
 582 Timeline::set_position_from_event (wxMouseEvent& ev)
 583 {
 584         if (!_pixels_per_second) {
 585                 return;
 586         }
 587
 588         double const pps = _pixels_per_second.get ();
 589
 590         wxPoint const p = ev.GetPosition();
 591
 592         if (!_first_move) {
 593                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 594                    before the drag is considered to have started.
 595                 */
 596                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 597                 if (dist < 8) {
 598                         return;
 599                 }
 600                 _first_move = true;
 601         }
 602
 603         if (!_down_view) {
 604                 return;
 605         }
 606
 607         DCPTime new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 608
 609         if (_snap) {
 610
 611                 DCPTime const new_end = new_position + _down_view->content()->length_after_trim();
 612                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 613                    positive is right).
 614                 */
 615                 optional<DCPTime> nearest_distance;
 616
 617                 /* Find the nearest snap point */
 618
 619                 BOOST_FOREACH (DCPTime i, _start_snaps) {
 620                         maybe_snap (i, new_position, nearest_distance);
 621                 }
 622
 623                 BOOST_FOREACH (DCPTime i, _end_snaps) {
 624                         maybe_snap (i, new_end, nearest_distance);
 625                 }
 626
 627                 if (nearest_distance) {
 628                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 629                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 630                                 new_position += nearest_distance.get ();
 631                         }
 632                 }
 633         }
 634
 635         if (new_position < DCPTime ()) {
 636                 new_position = DCPTime ();
 637         }
 638
 639         _down_view->content()->set_position (new_position);
 640
 641         shared_ptr<Film> film = _film.lock ();
 642         DCPOMATIC_ASSERT (film);
 643         film->set_sequence (false);
 644 }
 645
 646 void
 647 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 648 {
 649         RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 650 }
 651
 652 shared_ptr<const Film>
 653 Timeline::film () const
 654 {
 655         return _film.lock ();
 656 }
 657
 658 void
 659 Timeline::resized ()
 660 {
 661         setup_scrollbars ();
 662 }
 663
 664 void
 665 Timeline::clear_selection ()
 666 {
 667         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 668                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 669                 if (cv) {
 670                         cv->set_selected (false);
 671                 }
 672         }
 673 }
 674
 675 TimelineContentViewList
 676 Timeline::selected_views () const
 677 {
 678         TimelineContentViewList sel;
 679
 680         for (TimelineViewList::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 681                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 682                 if (cv && cv->selected()) {
 683                         sel.push_back (cv);
 684                 }
 685         }
 686
 687         return sel;
 688 }
 689
 690 ContentList
 691 Timeline::selected_content () const
 692 {
 693         ContentList sel;
 694         TimelineContentViewList views = selected_views ();
 695
 696         for (TimelineContentViewList::const_iterator i = views.begin(); i != views.end(); ++i) {
 697                 sel.push_back ((*i)->content ());
 698         }
 699
 700         return sel;
 701 }
 702
 703 void
 704 Timeline::set_selection (ContentList selection)
 705 {
 706         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 707                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 708                 if (cv) {
 709                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 710                 }
 711         }
 712 }