src/wx/timeline.cc

   1 /*
   2     Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
   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
  20 #include <list>
  21 #include <wx/graphics.h>
  22 #include <boost/weak_ptr.hpp>
  23 #include "lib/film.h"
  24 #include "lib/playlist.h"
  25 #include "lib/image_content.h"
  26 #include "film_editor.h"
  27 #include "timeline.h"
  28 #include "content_panel.h"
  29 #include "wx_util.h"
  30
  31 using std::list;
  32 using std::cout;
  33 using std::max;
  34 using boost::shared_ptr;
  35 using boost::weak_ptr;
  36 using boost::dynamic_pointer_cast;
  37 using boost::bind;
  38 using boost::optional;
  39
  40 /** @class View
  41  *  @brief Parent class for components of the timeline (e.g. a piece of content or an axis).
  42  */
  43 class View : public boost::noncopyable
  44 {
  45 public:
  46         View (Timeline& t)
  47                 : _timeline (t)
  48         {
  49
  50         }
  51
  52         virtual ~View () {}
  53
  54         void paint (wxGraphicsContext* g)
  55         {
  56                 _last_paint_bbox = bbox ();
  57                 do_paint (g);
  58         }
  59
  60         void force_redraw ()
  61         {
  62                 _timeline.force_redraw (_last_paint_bbox);
  63                 _timeline.force_redraw (bbox ());
  64         }
  65
  66         virtual dcpomatic::Rect<int> bbox () const = 0;
  67
  68 protected:
  69         virtual void do_paint (wxGraphicsContext *) = 0;
  70
  71         int time_x (DCPTime t) const
  72         {
  73                 return _timeline.tracks_position().x + t.seconds() * _timeline.pixels_per_second().get_value_or (0);
  74         }
  75
  76         Timeline& _timeline;
  77
  78 private:
  79         dcpomatic::Rect<int> _last_paint_bbox;
  80 };
  81
  82
  83 /** @class ContentView
  84  *  @brief Parent class for views of pieces of content.
  85  */
  86 class ContentView : public View
  87 {
  88 public:
  89         ContentView (Timeline& tl, shared_ptr<Content> c)
  90                 : View (tl)
  91                 , _content (c)
  92                 , _selected (false)
  93         {
  94                 _content_connection = c->Changed.connect (bind (&ContentView::content_changed, this, _2, _3));
  95         }
  96
  97         dcpomatic::Rect<int> bbox () const
  98         {
  99                 assert (_track);
 100
 101                 shared_ptr<const Film> film = _timeline.film ();
 102                 shared_ptr<const Content> content = _content.lock ();
 103                 if (!film || !content) {
 104                         return dcpomatic::Rect<int> ();
 105                 }
 106
 107                 return dcpomatic::Rect<int> (
 108                         time_x (content->position ()) - 8,
 109                         y_pos (_track.get()) - 8,
 110                         content->length_after_trim().seconds() * _timeline.pixels_per_second().get_value_or(0) + 16,
 111                         _timeline.track_height() + 16
 112                         );
 113         }
 114
 115         void set_selected (bool s) {
 116                 _selected = s;
 117                 force_redraw ();
 118         }
 119
 120         bool selected () const {
 121                 return _selected;
 122         }
 123
 124         shared_ptr<Content> content () const {
 125                 return _content.lock ();
 126         }
 127
 128         void set_track (int t) {
 129                 _track = t;
 130         }
 131
 132         void unset_track () {
 133                 _track = boost::optional<int> ();
 134         }
 135
 136         optional<int> track () const {
 137                 return _track;
 138         }
 139
 140         virtual wxString type () const = 0;
 141         virtual wxColour background_colour () const = 0;
 142         virtual wxColour foreground_colour () const = 0;
 143
 144 private:
 145
 146         void do_paint (wxGraphicsContext* gc)
 147         {
 148                 assert (_track);
 149
 150                 shared_ptr<const Film> film = _timeline.film ();
 151                 shared_ptr<const Content> cont = content ();
 152                 if (!film || !cont) {
 153                         return;
 154                 }
 155
 156                 DCPTime const position = cont->position ();
 157                 DCPTime const len = cont->length_after_trim ();
 158
 159                 wxColour selected (background_colour().Red() / 2, background_colour().Green() / 2, background_colour().Blue() / 2);
 160
 161                 gc->SetPen (*wxThePenList->FindOrCreatePen (foreground_colour(), 4, wxPENSTYLE_SOLID));
 162                 if (_selected) {
 163                         gc->SetBrush (*wxTheBrushList->FindOrCreateBrush (selected, wxBRUSHSTYLE_SOLID));
 164                 } else {
 165                         gc->SetBrush (*wxTheBrushList->FindOrCreateBrush (background_colour(), wxBRUSHSTYLE_SOLID));
 166                 }
 167
 168                 wxGraphicsPath path = gc->CreatePath ();
 169                 path.MoveToPoint    (time_x (position),       y_pos (_track.get()) + 4);
 170                 path.AddLineToPoint (time_x (position + len), y_pos (_track.get()) + 4);
 171                 path.AddLineToPoint (time_x (position + len), y_pos (_track.get() + 1) - 4);
 172                 path.AddLineToPoint (time_x (position),       y_pos (_track.get() + 1) - 4);
 173                 path.AddLineToPoint (time_x (position),       y_pos (_track.get()) + 4);
 174                 gc->StrokePath (path);
 175                 gc->FillPath (path);
 176
 177                 wxString name = wxString::Format (wxT ("%s [%s]"), std_to_wx (cont->summary()).data(), type().data());
 178                 wxDouble name_width;
 179                 wxDouble name_height;
 180                 wxDouble name_descent;
 181                 wxDouble name_leading;
 182                 gc->GetTextExtent (name, &name_width, &name_height, &name_descent, &name_leading);
 183
 184                 gc->Clip (wxRegion (time_x (position), y_pos (_track.get()), len.seconds() * _timeline.pixels_per_second().get_value_or(0), _timeline.track_height()));
 185                 gc->SetFont (gc->CreateFont (*wxNORMAL_FONT, foreground_colour ()));
 186                 gc->DrawText (name, time_x (position) + 12, y_pos (_track.get() + 1) - name_height - 4);
 187                 gc->ResetClip ();
 188         }
 189
 190         int y_pos (int t) const
 191         {
 192                 return _timeline.tracks_position().y + t * _timeline.track_height();
 193         }
 194
 195         void content_changed (int p, bool frequent)
 196         {
 197                 ensure_ui_thread ();
 198
 199                 if (p == ContentProperty::POSITION || p == ContentProperty::LENGTH) {
 200                         force_redraw ();
 201                 }
 202
 203                 if (!frequent) {
 204                         _timeline.setup_pixels_per_second ();
 205                         _timeline.Refresh ();
 206                 }
 207         }
 208
 209         boost::weak_ptr<Content> _content;
 210         optional<int> _track;
 211         bool _selected;
 212
 213         boost::signals2::scoped_connection _content_connection;
 214 };
 215
 216 /** @class AudioContentView
 217  *  @brief Timeline view for AudioContent.
 218  */
 219 class AudioContentView : public ContentView
 220 {
 221 public:
 222         AudioContentView (Timeline& tl, shared_ptr<Content> c)
 223                 : ContentView (tl, c)
 224         {}
 225
 226 private:
 227         wxString type () const
 228         {
 229                 return _("audio");
 230         }
 231
 232         wxColour background_colour () const
 233         {
 234                 return wxColour (149, 121, 232, 255);
 235         }
 236
 237         wxColour foreground_colour () const
 238         {
 239                 return wxColour (0, 0, 0, 255);
 240         }
 241 };
 242
 243 /** @class AudioContentView
 244  *  @brief Timeline view for VideoContent.
 245  */
 246 class VideoContentView : public ContentView
 247 {
 248 public:
 249         VideoContentView (Timeline& tl, shared_ptr<Content> c)
 250                 : ContentView (tl, c)
 251         {}
 252
 253 private:
 254
 255         wxString type () const
 256         {
 257                 if (dynamic_pointer_cast<ImageContent> (content ()) && content()->number_of_paths() == 1) {
 258                         return _("still");
 259                 } else {
 260                         return _("video");
 261                 }
 262         }
 263
 264         wxColour background_colour () const
 265         {
 266                 return wxColour (242, 92, 120, 255);
 267         }
 268
 269         wxColour foreground_colour () const
 270         {
 271                 return wxColour (0, 0, 0, 255);
 272         }
 273 };
 274
 275 /** @class AudioContentView
 276  *  @brief Timeline view for SubtitleContent.
 277  */
 278 class SubtitleContentView : public ContentView
 279 {
 280 public:
 281         SubtitleContentView (Timeline& tl, shared_ptr<SubtitleContent> c)
 282                 : ContentView (tl, c)
 283                 , _subtitle_content (c)
 284         {}
 285
 286 private:
 287         wxString type () const
 288         {
 289                 return _("subtitles");
 290         }
 291
 292         wxColour background_colour () const
 293         {
 294                 shared_ptr<SubtitleContent> sc = _subtitle_content.lock ();
 295                 if (!sc || !sc->use_subtitles ()) {
 296                         return wxColour (210, 210, 210, 128);
 297                 }
 298
 299                 return wxColour (163, 255, 154, 255);
 300         }
 301
 302         wxColour foreground_colour () const
 303         {
 304                 shared_ptr<SubtitleContent> sc = _subtitle_content.lock ();
 305                 if (!sc || !sc->use_subtitles ()) {
 306                         return wxColour (180, 180, 180, 128);
 307                 }
 308
 309                 return wxColour (0, 0, 0, 255);
 310         }
 311
 312         boost::weak_ptr<SubtitleContent> _subtitle_content;
 313 };
 314
 315 class TimeAxisView : public View
 316 {
 317 public:
 318         TimeAxisView (Timeline& tl, int y)
 319                 : View (tl)
 320                 , _y (y)
 321         {}
 322
 323         dcpomatic::Rect<int> bbox () const
 324         {
 325                 return dcpomatic::Rect<int> (0, _y - 4, _timeline.width(), 24);
 326         }
 327
 328         void set_y (int y)
 329         {
 330                 _y = y;
 331                 force_redraw ();
 332         }
 333
 334 private:
 335
 336         void do_paint (wxGraphicsContext* gc)
 337         {
 338                 if (!_timeline.pixels_per_second()) {
 339                         return;
 340                 }
 341
 342                 double const pps = _timeline.pixels_per_second().get ();
 343
 344                 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (0, 0, 0), 1, wxPENSTYLE_SOLID));
 345
 346                 double mark_interval = rint (128 / pps);
 347                 if (mark_interval > 5) {
 348                         mark_interval -= int (rint (mark_interval)) % 5;
 349                 }
 350                 if (mark_interval > 10) {
 351                         mark_interval -= int (rint (mark_interval)) % 10;
 352                 }
 353                 if (mark_interval > 60) {
 354                         mark_interval -= int (rint (mark_interval)) % 60;
 355                 }
 356                 if (mark_interval > 3600) {
 357                         mark_interval -= int (rint (mark_interval)) % 3600;
 358                 }
 359
 360                 if (mark_interval < 1) {
 361                         mark_interval = 1;
 362                 }
 363
 364                 wxGraphicsPath path = gc->CreatePath ();
 365                 path.MoveToPoint (_timeline.x_offset(), _y);
 366                 path.AddLineToPoint (_timeline.width(), _y);
 367                 gc->StrokePath (path);
 368
 369                 gc->SetFont (gc->CreateFont (*wxNORMAL_FONT));
 370
 371                 /* Time in seconds */
 372                 DCPTime t;
 373                 while ((t.seconds() * pps) < _timeline.width()) {
 374                         wxGraphicsPath path = gc->CreatePath ();
 375                         path.MoveToPoint (time_x (t), _y - 4);
 376                         path.AddLineToPoint (time_x (t), _y + 4);
 377                         gc->StrokePath (path);
 378
 379                         double tc = t.seconds ();
 380                         int const h = tc / 3600;
 381                         tc -= h * 3600;
 382                         int const m = tc / 60;
 383                         tc -= m * 60;
 384                         int const s = tc;
 385
 386                         wxString str = wxString::Format (wxT ("%02d:%02d:%02d"), h, m, s);
 387                         wxDouble str_width;
 388                         wxDouble str_height;
 389                         wxDouble str_descent;
 390                         wxDouble str_leading;
 391                         gc->GetTextExtent (str, &str_width, &str_height, &str_descent, &str_leading);
 392
 393                         int const tx = _timeline.x_offset() + t.seconds() * pps;
 394                         if ((tx + str_width) < _timeline.width()) {
 395                                 gc->DrawText (str, time_x (t), _y + 16);
 396                         }
 397
 398                         t += DCPTime::from_seconds (mark_interval);
 399                 }
 400         }
 401
 402 private:
 403         int _y;
 404 };
 405
 406
 407 Timeline::Timeline (wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film)
 408         : wxPanel (parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE)
 409         , _content_panel (cp)
 410         , _film (film)
 411         , _time_axis_view (new TimeAxisView (*this, 32))
 412         , _tracks (0)
 413         , _left_down (false)
 414         , _down_view_position (0)
 415         , _first_move (false)
 416         , _menu (this)
 417         , _snap (true)
 418 {
 419 #ifndef __WXOSX__
 420         SetDoubleBuffered (true);
 421 #endif
 422
 423         Bind (wxEVT_PAINT,      boost::bind (&Timeline::paint,       this));
 424         Bind (wxEVT_LEFT_DOWN,  boost::bind (&Timeline::left_down,   this, _1));
 425         Bind (wxEVT_LEFT_UP,    boost::bind (&Timeline::left_up,     this, _1));
 426         Bind (wxEVT_RIGHT_DOWN, boost::bind (&Timeline::right_down,  this, _1));
 427         Bind (wxEVT_MOTION,     boost::bind (&Timeline::mouse_moved, this, _1));
 428         Bind (wxEVT_SIZE,       boost::bind (&Timeline::resized,     this));
 429
 430         playlist_changed ();
 431
 432         SetMinSize (wxSize (640, tracks() * track_height() + 96));
 433
 434         _playlist_changed_connection = film->playlist()->Changed.connect (bind (&Timeline::playlist_changed, this));
 435         _playlist_content_changed_connection = film->playlist()->ContentChanged.connect (bind (&Timeline::playlist_content_changed, this, _2));
 436 }
 437
 438 void
 439 Timeline::paint ()
 440 {
 441         wxPaintDC dc (this);
 442
 443         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 444         if (!gc) {
 445                 return;
 446         }
 447
 448         for (ViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 449                 (*i)->paint (gc);
 450         }
 451
 452         delete gc;
 453 }
 454
 455 void
 456 Timeline::playlist_changed ()
 457 {
 458         ensure_ui_thread ();
 459
 460         shared_ptr<const Film> fl = _film.lock ();
 461         if (!fl) {
 462                 return;
 463         }
 464
 465         _views.clear ();
 466         _views.push_back (_time_axis_view);
 467
 468         ContentList content = fl->playlist()->content ();
 469
 470         for (ContentList::iterator i = content.begin(); i != content.end(); ++i) {
 471                 if (dynamic_pointer_cast<VideoContent> (*i)) {
 472                         _views.push_back (shared_ptr<View> (new VideoContentView (*this, *i)));
 473                 }
 474                 if (dynamic_pointer_cast<AudioContent> (*i)) {
 475                         _views.push_back (shared_ptr<View> (new AudioContentView (*this, *i)));
 476                 }
 477
 478                 shared_ptr<SubtitleContent> sc = dynamic_pointer_cast<SubtitleContent> (*i);
 479                 if (sc && sc->has_subtitles ()) {
 480                         _views.push_back (shared_ptr<View> (new SubtitleContentView (*this, sc)));
 481                 }
 482         }
 483
 484         assign_tracks ();
 485         setup_pixels_per_second ();
 486         Refresh ();
 487 }
 488
 489 void
 490 Timeline::playlist_content_changed (int property)
 491 {
 492         ensure_ui_thread ();
 493
 494         if (property == ContentProperty::POSITION) {
 495                 assign_tracks ();
 496                 setup_pixels_per_second ();
 497                 Refresh ();
 498         }
 499 }
 500
 501 void
 502 Timeline::assign_tracks ()
 503 {
 504         for (ViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 505                 shared_ptr<ContentView> c = dynamic_pointer_cast<ContentView> (*i);
 506                 if (c) {
 507                         c->unset_track ();
 508                 }
 509         }
 510
 511         for (ViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 512                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*i);
 513                 if (!cv) {
 514                         continue;
 515                 }
 516
 517                 shared_ptr<Content> content = cv->content();
 518
 519                 int t = 0;
 520                 while (true) {
 521                         ViewList::iterator j = _views.begin();
 522                         while (j != _views.end()) {
 523                                 shared_ptr<ContentView> test = dynamic_pointer_cast<ContentView> (*j);
 524                                 if (!test) {
 525                                         ++j;
 526                                         continue;
 527                                 }
 528
 529                                 shared_ptr<Content> test_content = test->content();
 530
 531                                 if (test && test->track() && test->track().get() == t) {
 532                                         bool const no_overlap =
 533                                                 (content->position() < test_content->position() && content->end() < test_content->position()) ||
 534                                                 (content->position() > test_content->end()      && content->end() > test_content->end());
 535
 536                                         if (!no_overlap) {
 537                                                 /* we have an overlap on track `t' */
 538                                                 ++t;
 539                                                 break;
 540                                         }
 541                                 }
 542
 543                                 ++j;
 544                         }
 545
 546                         if (j == _views.end ()) {
 547                                 /* no overlap on `t' */
 548                                 break;
 549                         }
 550                 }
 551
 552                 cv->set_track (t);
 553                 _tracks = max (_tracks, t + 1);
 554         }
 555
 556         _time_axis_view->set_y (tracks() * track_height() + 32);
 557 }
 558
 559 int
 560 Timeline::tracks () const
 561 {
 562         return _tracks;
 563 }
 564
 565 void
 566 Timeline::setup_pixels_per_second ()
 567 {
 568         shared_ptr<const Film> film = _film.lock ();
 569         if (!film || film->length() == DCPTime ()) {
 570                 return;
 571         }
 572
 573         _pixels_per_second = static_cast<double>(width() - x_offset() * 2) / film->length().seconds ();
 574 }
 575
 576 shared_ptr<View>
 577 Timeline::event_to_view (wxMouseEvent& ev)
 578 {
 579         ViewList::iterator i = _views.begin();
 580         Position<int> const p (ev.GetX(), ev.GetY());
 581         while (i != _views.end() && !(*i)->bbox().contains (p)) {
 582                 ++i;
 583         }
 584
 585         if (i == _views.end ()) {
 586                 return shared_ptr<View> ();
 587         }
 588
 589         return *i;
 590 }
 591
 592 void
 593 Timeline::left_down (wxMouseEvent& ev)
 594 {
 595         shared_ptr<View> view = event_to_view (ev);
 596         shared_ptr<ContentView> content_view = dynamic_pointer_cast<ContentView> (view);
 597
 598         _down_view.reset ();
 599
 600         if (content_view) {
 601                 _down_view = content_view;
 602                 _down_view_position = content_view->content()->position ();
 603         }
 604
 605         for (ViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 606                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*i);
 607                 if (!cv) {
 608                         continue;
 609                 }
 610
 611                 if (!ev.ShiftDown ()) {
 612                         cv->set_selected (view == *i);
 613                 }
 614
 615                 if (view == *i) {
 616                         _content_panel->set_selection (cv->content ());
 617                 }
 618         }
 619
 620         if (content_view && ev.ShiftDown ()) {
 621                 content_view->set_selected (!content_view->selected ());
 622         }
 623
 624         _left_down = true;
 625         _down_point = ev.GetPosition ();
 626         _first_move = false;
 627
 628         if (_down_view) {
 629                 _down_view->content()->set_change_signals_frequent (true);
 630         }
 631 }
 632
 633 void
 634 Timeline::left_up (wxMouseEvent& ev)
 635 {
 636         _left_down = false;
 637
 638         if (_down_view) {
 639                 _down_view->content()->set_change_signals_frequent (false);
 640         }
 641
 642         set_position_from_event (ev);
 643 }
 644
 645 void
 646 Timeline::mouse_moved (wxMouseEvent& ev)
 647 {
 648         if (!_left_down) {
 649                 return;
 650         }
 651
 652         set_position_from_event (ev);
 653 }
 654
 655 void
 656 Timeline::right_down (wxMouseEvent& ev)
 657 {
 658         shared_ptr<View> view = event_to_view (ev);
 659         shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (view);
 660         if (!cv) {
 661                 return;
 662         }
 663
 664         if (!cv->selected ()) {
 665                 clear_selection ();
 666                 cv->set_selected (true);
 667         }
 668
 669         _menu.popup (_film, selected_content (), ev.GetPosition ());
 670 }
 671
 672 void
 673 Timeline::set_position_from_event (wxMouseEvent& ev)
 674 {
 675         if (!_pixels_per_second) {
 676                 return;
 677         }
 678
 679         double const pps = _pixels_per_second.get ();
 680
 681         wxPoint const p = ev.GetPosition();
 682
 683         if (!_first_move) {
 684                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 685                    before the drag is considered to have started.
 686                 */
 687                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 688                 if (dist < 8) {
 689                         return;
 690                 }
 691                 _first_move = true;
 692         }
 693
 694         if (!_down_view) {
 695                 return;
 696         }
 697
 698         DCPTime new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 699
 700         if (_snap) {
 701
 702                 bool first = true;
 703                 DCPTime nearest_distance = DCPTime::max ();
 704                 DCPTime nearest_new_position = DCPTime::max ();
 705
 706                 /* Find the nearest content edge; this is inefficient */
 707                 for (ViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 708                         shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*i);
 709                         if (!cv || cv == _down_view) {
 710                                 continue;
 711                         }
 712
 713                         {
 714                                 /* Snap starts to ends */
 715                                 DCPTime const d = DCPTime (cv->content()->end() - new_position).abs ();
 716                                 if (first || d < nearest_distance) {
 717                                         nearest_distance = d;
 718                                         nearest_new_position = cv->content()->end();
 719                                 }
 720                         }
 721
 722                         {
 723                                 /* Snap ends to starts */
 724                                 DCPTime const d = DCPTime (
 725                                         cv->content()->position() - (new_position + _down_view->content()->length_after_trim())
 726                                         ).abs ();
 727
 728                                 if (d < nearest_distance) {
 729                                         nearest_distance = d;
 730                                         nearest_new_position = cv->content()->position() - _down_view->content()->length_after_trim ();
 731                                 }
 732                         }
 733
 734                         first = false;
 735                 }
 736
 737                 if (!first) {
 738                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 739                         if (nearest_distance < DCPTime::from_seconds ((width() / pps) / 32)) {
 740                                 new_position = nearest_new_position;
 741                         }
 742                 }
 743         }
 744
 745         if (new_position < DCPTime ()) {
 746                 new_position = DCPTime ();
 747         }
 748
 749         _down_view->content()->set_position (new_position);
 750
 751         shared_ptr<Film> film = _film.lock ();
 752         assert (film);
 753         film->set_sequence_video (false);
 754 }
 755
 756 void
 757 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 758 {
 759         RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 760 }
 761
 762 shared_ptr<const Film>
 763 Timeline::film () const
 764 {
 765         return _film.lock ();
 766 }
 767
 768 void
 769 Timeline::resized ()
 770 {
 771         setup_pixels_per_second ();
 772 }
 773
 774 void
 775 Timeline::clear_selection ()
 776 {
 777         for (ViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 778                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*i);
 779                 if (cv) {
 780                         cv->set_selected (false);
 781                 }
 782         }
 783 }
 784
 785 Timeline::ContentViewList
 786 Timeline::selected_views () const
 787 {
 788         ContentViewList sel;
 789
 790         for (ViewList::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 791                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*i);
 792                 if (cv && cv->selected()) {
 793                         sel.push_back (cv);
 794                 }
 795         }
 796
 797         return sel;
 798 }
 799
 800 ContentList
 801 Timeline::selected_content () const
 802 {
 803         ContentList sel;
 804         ContentViewList views = selected_views ();
 805
 806         for (ContentViewList::const_iterator i = views.begin(); i != views.end(); ++i) {
 807                 sel.push_back ((*i)->content ());
 808         }
 809
 810         return sel;
 811 }