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