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 /* 3 hours in 640 pixels */
  57 double const Timeline::_minimum_pixels_per_second = 640.0 / (60 * 60 * 3);
  58 int const Timeline::_minimum_pixels_per_track = 16;
  59
  60 Timeline::Timeline (wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film)
  61         : wxPanel (parent, wxID_ANY)
  62         , _labels_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  63         , _main_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  64         , _content_panel (cp)
  65         , _film (film)
  66         , _time_axis_view (new TimelineTimeAxisView (*this, 64))
  67         , _reels_view (new TimelineReelsView (*this, 32))
  68         , _labels_view (new TimelineLabelsView (*this))
  69         , _tracks (0)
  70         , _left_down (false)
  71         , _down_view_position (0)
  72         , _first_move (false)
  73         , _menu (this)
  74         , _snap (true)
  75         , _tool (SELECT)
  76         , _x_scroll_rate (16)
  77         , _y_scroll_rate (16)
  78         , _pixels_per_track (48)
  79         , _first_resize (true)
  80 {
  81 #ifndef __WXOSX__
  82         _labels_canvas->SetDoubleBuffered (true);
  83         _main_canvas->SetDoubleBuffered (true);
  84 #endif
  85
  86         wxSizer* sizer = new wxBoxSizer (wxHORIZONTAL);
  87         sizer->Add (_labels_canvas, 0, wxEXPAND);
  88         _labels_canvas->SetMinSize (wxSize (_labels_view->bbox().width, -1));
  89         sizer->Add (_main_canvas, 1, wxEXPAND);
  90         SetSizer (sizer);
  91
  92         _labels_canvas->Bind (wxEVT_PAINT,      boost::bind (&Timeline::paint_labels, this));
  93         _main_canvas->Bind   (wxEVT_PAINT,      boost::bind (&Timeline::paint_main,   this));
  94         _main_canvas->Bind   (wxEVT_LEFT_DOWN,  boost::bind (&Timeline::left_down,    this, _1));
  95         _main_canvas->Bind   (wxEVT_LEFT_UP,    boost::bind (&Timeline::left_up,      this, _1));
  96         _main_canvas->Bind   (wxEVT_RIGHT_DOWN, boost::bind (&Timeline::right_down,   this, _1));
  97         _main_canvas->Bind   (wxEVT_MOTION,     boost::bind (&Timeline::mouse_moved,  this, _1));
  98         _main_canvas->Bind   (wxEVT_SIZE,       boost::bind (&Timeline::resized,      this));
  99         _main_canvas->Bind   (wxEVT_SCROLLWIN_TOP,        boost::bind (&Timeline::scrolled,     this, _1));
 100         _main_canvas->Bind   (wxEVT_SCROLLWIN_BOTTOM,     boost::bind (&Timeline::scrolled,     this, _1));
 101         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 102         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 103         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 104         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 105         _main_canvas->Bind   (wxEVT_SCROLLWIN_THUMBTRACK, boost::bind (&Timeline::scrolled,     this, _1));
 106
 107         film_changed (Film::CONTENT);
 108
 109         SetMinSize (wxSize (640, 4 * pixels_per_track() + 96));
 110
 111         _film_changed_connection = film->Changed.connect (bind (&Timeline::film_changed, this, _1));
 112         _film_content_changed_connection = film->ContentChanged.connect (bind (&Timeline::film_content_changed, this, _2, _3));
 113
 114         setup_scrollbars ();
 115         _labels_canvas->ShowScrollbars (wxSHOW_SB_NEVER, wxSHOW_SB_NEVER);
 116 }
 117
 118 void
 119 Timeline::set_pixels_per_second (double pps)
 120 {
 121         _pixels_per_second = max (_minimum_pixels_per_second, pps);
 122 }
 123
 124 void
 125 Timeline::paint_labels ()
 126 {
 127         wxPaintDC dc (_labels_canvas);
 128
 129         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 130         if (!gc) {
 131                 return;
 132         }
 133
 134         int vsx, vsy;
 135         _labels_canvas->GetViewStart (&vsx, &vsy);
 136         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate + tracks_y_offset());
 137
 138         _labels_view->paint (gc, list<dcpomatic::Rect<int> >());
 139
 140         delete gc;
 141 }
 142
 143 void
 144 Timeline::paint_main ()
 145 {
 146         wxPaintDC dc (_main_canvas);
 147         _main_canvas->DoPrepareDC (dc);
 148
 149         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 150         if (!gc) {
 151                 return;
 152         }
 153
 154         int vsx, vsy;
 155         _main_canvas->GetViewStart (&vsx, &vsy);
 156         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate);
 157
 158         gc->SetAntialiasMode (wxANTIALIAS_DEFAULT);
 159
 160         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 161
 162                 shared_ptr<TimelineContentView> ic = dynamic_pointer_cast<TimelineContentView> (i);
 163
 164                 /* Find areas of overlap with other content views, so that we can plot them */
 165                 list<dcpomatic::Rect<int> > overlaps;
 166                 BOOST_FOREACH (shared_ptr<TimelineView> j, _views) {
 167                         shared_ptr<TimelineContentView> jc = dynamic_pointer_cast<TimelineContentView> (j);
 168                         /* No overlap with non-content views, views no different tracks, audio views or non-active views */
 169                         if (!ic || !jc || i == j || ic->track() != jc->track() || ic->track().get_value_or(2) >= 2 || !ic->active() || !jc->active()) {
 170                                 continue;
 171                         }
 172
 173                         optional<dcpomatic::Rect<int> > r = j->bbox().intersection (i->bbox());
 174                         if (r) {
 175                                 overlaps.push_back (r.get ());
 176                         }
 177                 }
 178
 179                 i->paint (gc, overlaps);
 180         }
 181
 182         if (_zoom_point) {
 183                 /* Translate back as _down_point and _zoom_point do not take scroll into account */
 184                 gc->Translate (vsx * _x_scroll_rate, vsy * _y_scroll_rate);
 185                 gc->SetPen (*wxBLACK_PEN);
 186                 gc->SetBrush (*wxTRANSPARENT_BRUSH);
 187                 gc->DrawRectangle (
 188                         min (_down_point.x, _zoom_point->x),
 189                         min (_down_point.y, _zoom_point->y),
 190                         fabs (_down_point.x - _zoom_point->x),
 191                         fabs (_down_point.y - _zoom_point->y)
 192                         );
 193         }
 194
 195         delete gc;
 196 }
 197
 198 void
 199 Timeline::film_changed (Film::Property p)
 200 {
 201         if (p == Film::CONTENT || p == Film::REEL_TYPE || p == Film::REEL_LENGTH) {
 202                 ensure_ui_thread ();
 203                 recreate_views ();
 204         } else if (p == Film::CONTENT_ORDER) {
 205                 Refresh ();
 206         }
 207 }
 208
 209 void
 210 Timeline::recreate_views ()
 211 {
 212         shared_ptr<const Film> film = _film.lock ();
 213         if (!film) {
 214                 return;
 215         }
 216
 217         _views.clear ();
 218         _views.push_back (_time_axis_view);
 219         _views.push_back (_reels_view);
 220
 221         BOOST_FOREACH (shared_ptr<Content> i, film->content ()) {
 222                 if (i->video) {
 223                         _views.push_back (shared_ptr<TimelineView> (new TimelineVideoContentView (*this, i)));
 224                 }
 225
 226                 if (i->audio && !i->audio->mapping().mapped_output_channels().empty ()) {
 227                         _views.push_back (shared_ptr<TimelineView> (new TimelineAudioContentView (*this, i)));
 228                 }
 229
 230                 if (i->subtitle) {
 231                         _views.push_back (shared_ptr<TimelineView> (new TimelineSubtitleContentView (*this, i)));
 232                 }
 233
 234                 if (dynamic_pointer_cast<AtmosMXFContent> (i)) {
 235                         _views.push_back (shared_ptr<TimelineView> (new TimelineAtmosContentView (*this, i)));
 236                 }
 237         }
 238
 239         assign_tracks ();
 240         setup_scrollbars ();
 241         Refresh ();
 242 }
 243
 244 void
 245 Timeline::film_content_changed (int property, bool frequent)
 246 {
 247         ensure_ui_thread ();
 248
 249         if (property == AudioContentProperty::STREAMS) {
 250                 recreate_views ();
 251         } else if (!frequent) {
 252                 setup_scrollbars ();
 253                 Refresh ();
 254         }
 255 }
 256
 257 template <class T>
 258 int
 259 place (TimelineViewList& views, int& tracks)
 260 {
 261         int const base = tracks;
 262
 263         BOOST_FOREACH (shared_ptr<TimelineView> i, views) {
 264                 if (!dynamic_pointer_cast<T>(i)) {
 265                         continue;
 266                 }
 267
 268                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (i);
 269
 270                 int t = base;
 271
 272                 shared_ptr<Content> content = cv->content();
 273                 DCPTimePeriod const content_period (content->position(), content->end());
 274
 275                 while (true) {
 276                         TimelineViewList::iterator j = views.begin();
 277                         while (j != views.end()) {
 278                                 shared_ptr<T> test = dynamic_pointer_cast<T> (*j);
 279                                 if (!test) {
 280                                         ++j;
 281                                         continue;
 282                                 }
 283
 284                                 shared_ptr<Content> test_content = test->content();
 285                                 if (
 286                                         test->track() && test->track().get() == t &&
 287                                         content_period.overlap(DCPTimePeriod(test_content->position(), test_content->end()))) {
 288                                         /* we have an overlap on track `t' */
 289                                         ++t;
 290                                         break;
 291                                 }
 292
 293                                 ++j;
 294                         }
 295
 296                         if (j == views.end ()) {
 297                                 /* no overlap on `t' */
 298                                 break;
 299                         }
 300                 }
 301
 302                 cv->set_track (t);
 303                 tracks = max (tracks, t + 1);
 304         }
 305
 306         return tracks - base;
 307 }
 308
 309 void
 310 Timeline::assign_tracks ()
 311 {
 312         /* Tracks are:
 313            Video (mono or left-eye)
 314            Video (right-eye)
 315            Subtitle 1
 316            Subtitle 2
 317            Subtitle N
 318            Atmos
 319            Audio 1
 320            Audio 2
 321            Audio N
 322         */
 323
 324         _tracks = 0;
 325
 326         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 327                 shared_ptr<TimelineContentView> c = dynamic_pointer_cast<TimelineContentView> (*i);
 328                 if (c) {
 329                         c->unset_track ();
 330                 }
 331         }
 332
 333         /* Video */
 334
 335         bool have_3d = false;
 336         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 337                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 338                 if (!cv) {
 339                         continue;
 340                 }
 341
 342                 /* Video on tracks 0 and maybe 1 (left and right eye) */
 343                 if (cv->content()->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
 344                         cv->set_track (1);
 345                         _tracks = max (_tracks, 2);
 346                         have_3d = true;
 347                 } else {
 348                         cv->set_track (0);
 349                 }
 350         }
 351
 352         _tracks = max (_tracks, 1);
 353
 354         /* Subtitle */
 355
 356         int const subtitle_tracks = place<TimelineSubtitleContentView> (_views, _tracks);
 357
 358         /* Atmos */
 359
 360         bool have_atmos = false;
 361         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 362                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 363                 if (!cv) {
 364                         continue;
 365                 }
 366                 if (dynamic_pointer_cast<TimelineAtmosContentView> (i)) {
 367                         cv->set_track (_tracks - 1);
 368                         have_atmos = true;
 369                 }
 370         }
 371
 372         if (have_atmos) {
 373                 ++_tracks;
 374         }
 375
 376         /* Audio */
 377
 378         int const audio_tracks = place<TimelineAudioContentView> (_views, _tracks);
 379
 380         _labels_view->set_3d (have_3d);
 381         _labels_view->set_audio_tracks (audio_tracks);
 382         _labels_view->set_subtitle_tracks (subtitle_tracks);
 383         _labels_view->set_atmos (have_atmos);
 384
 385         _time_axis_view->set_y (tracks());
 386         _reels_view->set_y (8);
 387 }
 388
 389 int
 390 Timeline::tracks () const
 391 {
 392         return _tracks;
 393 }
 394
 395 void
 396 Timeline::setup_scrollbars ()
 397 {
 398         shared_ptr<const Film> film = _film.lock ();
 399         if (!film || !_pixels_per_second) {
 400                 return;
 401         }
 402
 403         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 404
 405         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 406         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 407         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 408         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 409 }
 410
 411 shared_ptr<TimelineView>
 412 Timeline::event_to_view (wxMouseEvent& ev)
 413 {
 414         /* Search backwards through views so that we find the uppermost one first */
 415         TimelineViewList::reverse_iterator i = _views.rbegin();
 416         Position<int> const p (ev.GetX(), ev.GetY());
 417         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 418                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 419                 ++i;
 420         }
 421
 422         if (i == _views.rend ()) {
 423                 return shared_ptr<TimelineView> ();
 424         }
 425
 426         return *i;
 427 }
 428
 429 void
 430 Timeline::left_down (wxMouseEvent& ev)
 431 {
 432         _left_down = true;
 433         _down_point = ev.GetPosition ();
 434
 435         switch (_tool) {
 436         case SELECT:
 437                 left_down_select (ev);
 438                 break;
 439         case ZOOM:
 440         case ZOOM_ALL:
 441         case SNAP:
 442         case SEQUENCE:
 443                 /* Nothing to do */
 444                 break;
 445         }
 446 }
 447
 448 void
 449 Timeline::left_down_select (wxMouseEvent& ev)
 450 {
 451         shared_ptr<TimelineView> view = event_to_view (ev);
 452         shared_ptr<TimelineContentView> content_view = dynamic_pointer_cast<TimelineContentView> (view);
 453
 454         _down_view.reset ();
 455
 456         if (content_view) {
 457                 _down_view = content_view;
 458                 _down_view_position = content_view->content()->position ();
 459         }
 460
 461         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 462                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 463                 if (!cv) {
 464                         continue;
 465                 }
 466
 467                 if (!ev.ShiftDown ()) {
 468                         cv->set_selected (view == *i);
 469                 }
 470         }
 471
 472         if (content_view && ev.ShiftDown ()) {
 473                 content_view->set_selected (!content_view->selected ());
 474         }
 475
 476         _first_move = false;
 477
 478         if (_down_view) {
 479                 /* Pre-compute the points that we might snap to */
 480                 for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 481                         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 482                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 483                                 continue;
 484                         }
 485
 486                         _start_snaps.push_back (cv->content()->position());
 487                         _end_snaps.push_back (cv->content()->position());
 488                         _start_snaps.push_back (cv->content()->end());
 489                         _end_snaps.push_back (cv->content()->end());
 490
 491                         BOOST_FOREACH (DCPTime i, cv->content()->reel_split_points()) {
 492                                 _start_snaps.push_back (i);
 493                         }
 494                 }
 495
 496                 /* Tell everyone that things might change frequently during the drag */
 497                 _down_view->content()->set_change_signals_frequent (true);
 498         }
 499 }
 500
 501 void
 502 Timeline::left_up (wxMouseEvent& ev)
 503 {
 504         _left_down = false;
 505
 506         switch (_tool) {
 507         case SELECT:
 508                 left_up_select (ev);
 509                 break;
 510         case ZOOM:
 511                 left_up_zoom (ev);
 512                 break;
 513         case ZOOM_ALL:
 514         case SNAP:
 515         case SEQUENCE:
 516                 break;
 517         }
 518 }
 519
 520 void
 521 Timeline::left_up_select (wxMouseEvent& ev)
 522 {
 523         if (_down_view) {
 524                 _down_view->content()->set_change_signals_frequent (false);
 525         }
 526
 527         _content_panel->set_selection (selected_content ());
 528         set_position_from_event (ev);
 529
 530         /* Clear up up the stuff we don't do during drag */
 531         assign_tracks ();
 532         setup_scrollbars ();
 533         Refresh ();
 534
 535         _start_snaps.clear ();
 536         _end_snaps.clear ();
 537 }
 538
 539 void
 540 Timeline::left_up_zoom (wxMouseEvent& ev)
 541 {
 542         _zoom_point = ev.GetPosition ();
 543
 544         int vsx, vsy;
 545         _main_canvas->GetViewStart (&vsx, &vsy);
 546
 547         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 548         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 549
 550         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 551                 /* Very small zoom rectangle: we assume it wasn't intentional */
 552                 return;
 553         }
 554
 555         DCPTime const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 556         DCPTime const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 557         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 558
 559         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 560         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 561         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 562
 563         setup_scrollbars ();
 564         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 565         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 566         _labels_canvas->Scroll (0, y);
 567
 568         _zoom_point = optional<wxPoint> ();
 569         Refresh ();
 570 }
 571
 572 void
 573 Timeline::set_pixels_per_track (int h)
 574 {
 575         _pixels_per_track = max(_minimum_pixels_per_track, h);
 576 }
 577
 578 void
 579 Timeline::mouse_moved (wxMouseEvent& ev)
 580 {
 581         switch (_tool) {
 582         case SELECT:
 583                 mouse_moved_select (ev);
 584                 break;
 585         case ZOOM:
 586                 mouse_moved_zoom (ev);
 587                 break;
 588         case ZOOM_ALL:
 589         case SNAP:
 590         case SEQUENCE:
 591                 break;
 592         }
 593 }
 594
 595 void
 596 Timeline::mouse_moved_select (wxMouseEvent& ev)
 597 {
 598         if (!_left_down) {
 599                 return;
 600         }
 601
 602         set_position_from_event (ev);
 603 }
 604
 605 void
 606 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 607 {
 608         if (!_left_down) {
 609                 return;
 610         }
 611
 612         _zoom_point = ev.GetPosition ();
 613         Refresh ();
 614 }
 615
 616 void
 617 Timeline::right_down (wxMouseEvent& ev)
 618 {
 619         switch (_tool) {
 620         case SELECT:
 621                 right_down_select (ev);
 622                 break;
 623         case ZOOM:
 624                 /* Zoom out */
 625                 set_pixels_per_second (*_pixels_per_second / 2);
 626                 set_pixels_per_track (_pixels_per_track / 2);
 627                 setup_scrollbars ();
 628                 Refresh ();
 629                 break;
 630         case ZOOM_ALL:
 631         case SNAP:
 632         case SEQUENCE:
 633                 break;
 634         }
 635 }
 636
 637 void
 638 Timeline::right_down_select (wxMouseEvent& ev)
 639 {
 640         shared_ptr<TimelineView> view = event_to_view (ev);
 641         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (view);
 642         if (!cv) {
 643                 return;
 644         }
 645
 646         if (!cv->selected ()) {
 647                 clear_selection ();
 648                 cv->set_selected (true);
 649         }
 650
 651         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 652 }
 653
 654 void
 655 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 656 {
 657         DCPTime const d = a - b;
 658         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 659                 nearest_distance = d;
 660         }
 661 }
 662
 663 void
 664 Timeline::set_position_from_event (wxMouseEvent& ev)
 665 {
 666         if (!_pixels_per_second) {
 667                 return;
 668         }
 669
 670         double const pps = _pixels_per_second.get ();
 671
 672         wxPoint const p = ev.GetPosition();
 673
 674         if (!_first_move) {
 675                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 676                    before the drag is considered to have started.
 677                 */
 678                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 679                 if (dist < 8) {
 680                         return;
 681                 }
 682                 _first_move = true;
 683         }
 684
 685         if (!_down_view) {
 686                 return;
 687         }
 688
 689         DCPTime new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 690
 691         if (_snap) {
 692
 693                 DCPTime const new_end = new_position + _down_view->content()->length_after_trim();
 694                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 695                    positive is right).
 696                 */
 697                 optional<DCPTime> nearest_distance;
 698
 699                 /* Find the nearest snap point */
 700
 701                 BOOST_FOREACH (DCPTime i, _start_snaps) {
 702                         maybe_snap (i, new_position, nearest_distance);
 703                 }
 704
 705                 BOOST_FOREACH (DCPTime i, _end_snaps) {
 706                         maybe_snap (i, new_end, nearest_distance);
 707                 }
 708
 709                 if (nearest_distance) {
 710                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 711                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 712                                 new_position += nearest_distance.get ();
 713                         }
 714                 }
 715         }
 716
 717         if (new_position < DCPTime ()) {
 718                 new_position = DCPTime ();
 719         }
 720
 721         _down_view->content()->set_position (new_position);
 722
 723         shared_ptr<Film> film = _film.lock ();
 724         DCPOMATIC_ASSERT (film);
 725         film->set_sequence (false);
 726 }
 727
 728 void
 729 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 730 {
 731         RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 732 }
 733
 734 shared_ptr<const Film>
 735 Timeline::film () const
 736 {
 737         return _film.lock ();
 738 }
 739
 740 void
 741 Timeline::resized ()
 742 {
 743         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 744                 zoom_all ();
 745                 _first_resize = false;
 746         }
 747         setup_scrollbars ();
 748 }
 749
 750 void
 751 Timeline::clear_selection ()
 752 {
 753         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 754                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 755                 if (cv) {
 756                         cv->set_selected (false);
 757                 }
 758         }
 759 }
 760
 761 TimelineContentViewList
 762 Timeline::selected_views () const
 763 {
 764         TimelineContentViewList sel;
 765
 766         for (TimelineViewList::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 767                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 768                 if (cv && cv->selected()) {
 769                         sel.push_back (cv);
 770                 }
 771         }
 772
 773         return sel;
 774 }
 775
 776 ContentList
 777 Timeline::selected_content () const
 778 {
 779         ContentList sel;
 780         TimelineContentViewList views = selected_views ();
 781
 782         for (TimelineContentViewList::const_iterator i = views.begin(); i != views.end(); ++i) {
 783                 sel.push_back ((*i)->content ());
 784         }
 785
 786         return sel;
 787 }
 788
 789 void
 790 Timeline::set_selection (ContentList selection)
 791 {
 792         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 793                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 794                 if (cv) {
 795                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 796                 }
 797         }
 798 }
 799
 800 int
 801 Timeline::tracks_y_offset () const
 802 {
 803         return _reels_view->bbox().height + 4;
 804 }
 805
 806 int
 807 Timeline::width () const
 808 {
 809         return _main_canvas->GetVirtualSize().GetWidth();
 810 }
 811
 812 void
 813 Timeline::scrolled (wxScrollWinEvent& ev)
 814 {
 815         if (ev.GetOrientation() == wxVERTICAL) {
 816                 int x, y;
 817                 _main_canvas->GetViewStart (&x, &y);
 818                 _labels_canvas->Scroll (0, y);
 819         }
 820         ev.Skip ();
 821 }
 822
 823 void
 824 Timeline::tool_clicked (Tool t)
 825 {
 826         switch (t) {
 827         case ZOOM:
 828         case SELECT:
 829                 _tool = t;
 830                 break;
 831         case ZOOM_ALL:
 832                 zoom_all ();
 833                 break;
 834         case SNAP:
 835         case SEQUENCE:
 836                 break;
 837         }
 838 }
 839
 840 void
 841 Timeline::zoom_all ()
 842 {
 843         shared_ptr<Film> film = _film.lock ();
 844         DCPOMATIC_ASSERT (film);
 845         set_pixels_per_second ((_main_canvas->GetSize().GetWidth() - 32) / film->length().seconds());
 846         set_pixels_per_track ((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / _tracks);
 847         setup_scrollbars ();
 848         _main_canvas->Scroll (0, 0);
 849         _labels_canvas->Scroll (0, 0);
 850         Refresh ();
 851 }