src/wx/timeline.cc

   1 /*
   2     Copyright (C) 2013-2021 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_text_content_view.h"
  29 #include "timeline_atmos_content_view.h"
  30 #include "content_panel.h"
  31 #include "wx_util.h"
  32 #include "film_viewer.h"
  33 #include "lib/film.h"
  34 #include "lib/playlist.h"
  35 #include "lib/image_content.h"
  36 #include "lib/timer.h"
  37 #include "lib/audio_content.h"
  38 #include "lib/text_content.h"
  39 #include "lib/video_content.h"
  40 #include "lib/atmos_mxf_content.h"
  41 #include <wx/graphics.h>
  42 #include <list>
  43 #include <iterator>
  44 #include <iostream>
  45
  46 using std::list;
  47 using std::cout;
  48 using std::min;
  49 using std::max;
  50 using std::abs;
  51 using std::shared_ptr;
  52 using std::weak_ptr;
  53 using std::dynamic_pointer_cast;
  54 using std::make_shared;
  55 using boost::bind;
  56 using boost::optional;
  57 using namespace dcpomatic;
  58 #if BOOST_VERSION >= 106100
  59 using namespace boost::placeholders;
  60 #endif
  61
  62 /* 3 hours in 640 pixels */
  63 double const Timeline::_minimum_pixels_per_second = 640.0 / (60 * 60 * 3);
  64 int const Timeline::_minimum_pixels_per_track = 16;
  65
  66 Timeline::Timeline (wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film, weak_ptr<FilmViewer> viewer)
  67         : wxPanel (parent, wxID_ANY)
  68         , _labels_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  69         , _main_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  70         , _content_panel (cp)
  71         , _film (film)
  72         , _viewer (viewer)
  73         , _time_axis_view (new TimelineTimeAxisView (*this, 64))
  74         , _reels_view (new TimelineReelsView (*this, 32))
  75         , _labels_view (new TimelineLabelsView (*this))
  76         , _tracks (0)
  77         , _left_down (false)
  78         , _down_view_position (0)
  79         , _first_move (false)
  80         , _menu (this)
  81         , _snap (true)
  82         , _tool (SELECT)
  83         , _x_scroll_rate (16)
  84         , _y_scroll_rate (16)
  85         , _pixels_per_track (48)
  86         , _first_resize (true)
  87         , _timer (this)
  88 {
  89 #ifndef __WXOSX__
  90         _labels_canvas->SetDoubleBuffered (true);
  91         _main_canvas->SetDoubleBuffered (true);
  92 #endif
  93
  94         auto sizer = new wxBoxSizer (wxHORIZONTAL);
  95         sizer->Add (_labels_canvas, 0, wxEXPAND);
  96         _labels_canvas->SetMinSize (wxSize (_labels_view->bbox().width, -1));
  97         sizer->Add (_main_canvas, 1, wxEXPAND);
  98         SetSizer (sizer);
  99
 100         _labels_canvas->Bind (wxEVT_PAINT,      boost::bind (&Timeline::paint_labels, this));
 101         _main_canvas->Bind   (wxEVT_PAINT,      boost::bind (&Timeline::paint_main,   this));
 102         _main_canvas->Bind   (wxEVT_LEFT_DOWN,  boost::bind (&Timeline::left_down,    this, _1));
 103         _main_canvas->Bind   (wxEVT_LEFT_UP,    boost::bind (&Timeline::left_up,      this, _1));
 104         _main_canvas->Bind   (wxEVT_RIGHT_DOWN, boost::bind (&Timeline::right_down,   this, _1));
 105         _main_canvas->Bind   (wxEVT_MOTION,     boost::bind (&Timeline::mouse_moved,  this, _1));
 106         _main_canvas->Bind   (wxEVT_SIZE,       boost::bind (&Timeline::resized,      this));
 107         _main_canvas->Bind   (wxEVT_SCROLLWIN_TOP,        boost::bind (&Timeline::scrolled,     this, _1));
 108         _main_canvas->Bind   (wxEVT_SCROLLWIN_BOTTOM,     boost::bind (&Timeline::scrolled,     this, _1));
 109         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 110         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 111         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 112         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 113         _main_canvas->Bind   (wxEVT_SCROLLWIN_THUMBTRACK, boost::bind (&Timeline::scrolled,     this, _1));
 114
 115         film_change (ChangeType::DONE, Film::Property::CONTENT);
 116
 117         SetMinSize (wxSize (640, 4 * pixels_per_track() + 96));
 118
 119         _film_changed_connection = film->Change.connect (bind (&Timeline::film_change, this, _1, _2));
 120         _film_content_change_connection = film->ContentChange.connect (bind (&Timeline::film_content_change, this, _1, _3, _4));
 121
 122         Bind (wxEVT_TIMER, boost::bind(&Timeline::update_playhead, this));
 123         _timer.Start (200, wxTIMER_CONTINUOUS);
 124
 125         setup_scrollbars ();
 126         _labels_canvas->ShowScrollbars (wxSHOW_SB_NEVER, wxSHOW_SB_NEVER);
 127 }
 128
 129 void
 130 Timeline::update_playhead ()
 131 {
 132         Refresh ();
 133 }
 134
 135 void
 136 Timeline::set_pixels_per_second (double pps)
 137 {
 138         _pixels_per_second = max (_minimum_pixels_per_second, pps);
 139 }
 140
 141 void
 142 Timeline::paint_labels ()
 143 {
 144         wxPaintDC dc (_labels_canvas);
 145
 146         auto gc = wxGraphicsContext::Create (dc);
 147         if (!gc) {
 148                 return;
 149         }
 150
 151         int vsx, vsy;
 152         _labels_canvas->GetViewStart (&vsx, &vsy);
 153         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate + tracks_y_offset());
 154
 155         _labels_view->paint (gc, list<dcpomatic::Rect<int> >());
 156
 157         delete gc;
 158 }
 159
 160 void
 161 Timeline::paint_main ()
 162 {
 163         wxPaintDC dc (_main_canvas);
 164         _main_canvas->DoPrepareDC (dc);
 165
 166         auto gc = wxGraphicsContext::Create (dc);
 167         if (!gc) {
 168                 return;
 169         }
 170
 171         int vsx, vsy;
 172         _main_canvas->GetViewStart (&vsx, &vsy);
 173         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate);
 174
 175         gc->SetAntialiasMode (wxANTIALIAS_DEFAULT);
 176
 177         for (auto i: _views) {
 178
 179                 auto ic = dynamic_pointer_cast<TimelineContentView> (i);
 180
 181                 /* Find areas of overlap with other content views, so that we can plot them */
 182                 list<dcpomatic::Rect<int>> overlaps;
 183                 for (auto j: _views) {
 184                         auto jc = dynamic_pointer_cast<TimelineContentView> (j);
 185                         /* No overlap with non-content views, views on different tracks, audio views or non-active views */
 186                         if (!ic || !jc || i == j || ic->track() != jc->track() || ic->track().get_value_or(2) >= 2 || !ic->active() || !jc->active()) {
 187                                 continue;
 188                         }
 189
 190                         auto r = j->bbox().intersection(i->bbox());
 191                         if (r) {
 192                                 overlaps.push_back (r.get ());
 193                         }
 194                 }
 195
 196                 i->paint (gc, overlaps);
 197         }
 198
 199         if (_zoom_point) {
 200                 /* Translate back as _down_point and _zoom_point do not take scroll into account */
 201                 gc->Translate (vsx * _x_scroll_rate, vsy * _y_scroll_rate);
 202                 gc->SetPen (*wxBLACK_PEN);
 203                 gc->SetBrush (*wxTRANSPARENT_BRUSH);
 204                 gc->DrawRectangle (
 205                         min (_down_point.x, _zoom_point->x),
 206                         min (_down_point.y, _zoom_point->y),
 207                         abs (_down_point.x - _zoom_point->x),
 208                         abs (_down_point.y - _zoom_point->y)
 209                         );
 210         }
 211
 212         /* Playhead */
 213
 214         auto vp = _viewer.lock ();
 215         DCPOMATIC_ASSERT (vp);
 216
 217         gc->SetPen (*wxRED_PEN);
 218         auto path = gc->CreatePath ();
 219         double const ph = vp->position().seconds() * pixels_per_second().get_value_or(0);
 220         path.MoveToPoint (ph, 0);
 221         path.AddLineToPoint (ph, pixels_per_track() * _tracks + 32);
 222         gc->StrokePath (path);
 223
 224         delete gc;
 225 }
 226
 227 void
 228 Timeline::film_change (ChangeType type, Film::Property p)
 229 {
 230         if (type != ChangeType::DONE) {
 231                 return;
 232         }
 233
 234         if (p == Film::Property::CONTENT || p == Film::Property::REEL_TYPE || p == Film::Property::REEL_LENGTH) {
 235                 ensure_ui_thread ();
 236                 recreate_views ();
 237         } else if (p == Film::Property::CONTENT_ORDER) {
 238                 Refresh ();
 239         }
 240 }
 241
 242 void
 243 Timeline::recreate_views ()
 244 {
 245         auto film = _film.lock ();
 246         if (!film) {
 247                 return;
 248         }
 249
 250         _views.clear ();
 251         _views.push_back (_time_axis_view);
 252         _views.push_back (_reels_view);
 253
 254         for (auto i: film->content ()) {
 255                 if (i->video) {
 256                         _views.push_back (make_shared<TimelineVideoContentView>(*this, i));
 257                 }
 258
 259                 if (i->audio && !i->audio->mapping().mapped_output_channels().empty ()) {
 260                         _views.push_back (make_shared<TimelineAudioContentView>(*this, i));
 261                 }
 262
 263                 for (auto j: i->text) {
 264                         _views.push_back (make_shared<TimelineTextContentView>(*this, i, j));
 265                 }
 266
 267                 if (i->atmos) {
 268                         _views.push_back (make_shared<TimelineAtmosContentView>(*this, i));
 269                 }
 270         }
 271
 272         assign_tracks ();
 273         setup_scrollbars ();
 274         Refresh ();
 275 }
 276
 277 void
 278 Timeline::film_content_change (ChangeType type, int property, bool frequent)
 279 {
 280         if (type != ChangeType::DONE) {
 281                 return;
 282         }
 283
 284         ensure_ui_thread ();
 285
 286         if (property == AudioContentProperty::STREAMS || property == VideoContentProperty::FRAME_TYPE) {
 287                 recreate_views ();
 288         } else if (property == ContentProperty::POSITION || property == ContentProperty::LENGTH) {
 289                 _reels_view->force_redraw ();
 290         } else if (!frequent) {
 291                 setup_scrollbars ();
 292                 Refresh ();
 293         }
 294 }
 295
 296 template <class T>
 297 int
 298 place (shared_ptr<const Film> film, TimelineViewList& views, int& tracks)
 299 {
 300         int const base = tracks;
 301
 302         for (auto i: views) {
 303                 if (!dynamic_pointer_cast<T>(i)) {
 304                         continue;
 305                 }
 306
 307                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 308
 309                 int t = base;
 310
 311                 auto content = cv->content();
 312                 DCPTimePeriod const content_period (content->position(), content->end(film));
 313
 314                 while (true) {
 315                         auto j = views.begin();
 316                         while (j != views.end()) {
 317                                 auto test = dynamic_pointer_cast<T> (*j);
 318                                 if (!test) {
 319                                         ++j;
 320                                         continue;
 321                                 }
 322
 323                                 auto test_content = test->content();
 324                                 if (
 325                                         test->track() && test->track().get() == t &&
 326                                         content_period.overlap(DCPTimePeriod(test_content->position(), test_content->end(film)))) {
 327                                         /* we have an overlap on track `t' */
 328                                         ++t;
 329                                         break;
 330                                 }
 331
 332                                 ++j;
 333                         }
 334
 335                         if (j == views.end ()) {
 336                                 /* no overlap on `t' */
 337                                 break;
 338                         }
 339                 }
 340
 341                 cv->set_track (t);
 342                 tracks = max (tracks, t + 1);
 343         }
 344
 345         return tracks - base;
 346 }
 347
 348 /** Compare the mapped output channels of two TimelineViews, so we can into
 349  *  order of first mapped DCP channel.
 350  */
 351 struct AudioMappingComparator {
 352         bool operator()(shared_ptr<TimelineView> a, shared_ptr<TimelineView> b) {
 353                 int la = -1;
 354                 auto cva = dynamic_pointer_cast<TimelineAudioContentView>(a);
 355                 if (cva) {
 356                         auto oc = cva->content()->audio->mapping().mapped_output_channels();
 357                         la = *min_element(boost::begin(oc), boost::end(oc));
 358                 }
 359                 int lb = -1;
 360                 auto cvb = dynamic_pointer_cast<TimelineAudioContentView>(b);
 361                 if (cvb) {
 362                         auto oc = cvb->content()->audio->mapping().mapped_output_channels();
 363                         lb = *min_element(boost::begin(oc), boost::end(oc));
 364                 }
 365                 return la < lb;
 366         }
 367 };
 368
 369 void
 370 Timeline::assign_tracks ()
 371 {
 372         /* Tracks are:
 373            Video (mono or left-eye)
 374            Video (right-eye)
 375            Text 1
 376            Text 2
 377            Text N
 378            Atmos
 379            Audio 1
 380            Audio 2
 381            Audio N
 382         */
 383
 384         auto film = _film.lock ();
 385         DCPOMATIC_ASSERT (film);
 386
 387         _tracks = 0;
 388
 389         for (auto i: _views) {
 390                 auto c = dynamic_pointer_cast<TimelineContentView>(i);
 391                 if (c) {
 392                         c->unset_track ();
 393                 }
 394         }
 395
 396         /* Video */
 397
 398         bool have_3d = false;
 399         for (auto i: _views) {
 400                 auto cv = dynamic_pointer_cast<TimelineVideoContentView>(i);
 401                 if (!cv) {
 402                         continue;
 403                 }
 404
 405                 /* Video on tracks 0 and maybe 1 (left and right eye) */
 406                 if (cv->content()->video->frame_type() == VideoFrameType::THREE_D_RIGHT) {
 407                         cv->set_track (1);
 408                         _tracks = max (_tracks, 2);
 409                         have_3d = true;
 410                 } else {
 411                         cv->set_track (0);
 412                 }
 413         }
 414
 415         _tracks = max (_tracks, 1);
 416
 417         /* Texts */
 418
 419         int const text_tracks = place<TimelineTextContentView> (film, _views, _tracks);
 420
 421         /* Atmos */
 422
 423         bool have_atmos = false;
 424         for (auto i: _views) {
 425                 auto cv = dynamic_pointer_cast<TimelineAtmosContentView>(i);
 426                 if (cv) {
 427                         cv->set_track (_tracks);
 428                         have_atmos = true;
 429                 }
 430         }
 431
 432         if (have_atmos) {
 433                 ++_tracks;
 434         }
 435
 436         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 437            DCP channel index.
 438         */
 439
 440         auto views = _views;
 441         sort(views.begin(), views.end(), AudioMappingComparator());
 442         int const audio_tracks = place<TimelineAudioContentView> (film, views, _tracks);
 443
 444         _labels_view->set_3d (have_3d);
 445         _labels_view->set_audio_tracks (audio_tracks);
 446         _labels_view->set_text_tracks (text_tracks);
 447         _labels_view->set_atmos (have_atmos);
 448
 449         _time_axis_view->set_y (tracks());
 450         _reels_view->set_y (8);
 451 }
 452
 453 int
 454 Timeline::tracks () const
 455 {
 456         return _tracks;
 457 }
 458
 459 void
 460 Timeline::setup_scrollbars ()
 461 {
 462         auto film = _film.lock ();
 463         if (!film || !_pixels_per_second) {
 464                 return;
 465         }
 466
 467         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 468
 469         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 470         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 471         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 472         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 473 }
 474
 475 shared_ptr<TimelineView>
 476 Timeline::event_to_view (wxMouseEvent& ev)
 477 {
 478         /* Search backwards through views so that we find the uppermost one first */
 479         auto i = _views.rbegin();
 480
 481         int vsx, vsy;
 482         _main_canvas->GetViewStart (&vsx, &vsy);
 483         Position<int> const p (ev.GetX() + vsx * _x_scroll_rate, ev.GetY() + vsy * _y_scroll_rate);
 484
 485         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 486                 auto cv = dynamic_pointer_cast<TimelineContentView>(*i);
 487                 ++i;
 488         }
 489
 490         if (i == _views.rend ()) {
 491                 return {};
 492         }
 493
 494         return *i;
 495 }
 496
 497 void
 498 Timeline::left_down (wxMouseEvent& ev)
 499 {
 500         _left_down = true;
 501         _down_point = ev.GetPosition ();
 502
 503         switch (_tool) {
 504         case SELECT:
 505                 left_down_select (ev);
 506                 break;
 507         case ZOOM:
 508         case ZOOM_ALL:
 509         case SNAP:
 510         case SEQUENCE:
 511                 /* Nothing to do */
 512                 break;
 513         }
 514 }
 515
 516 void
 517 Timeline::left_down_select (wxMouseEvent& ev)
 518 {
 519         auto view = event_to_view (ev);
 520         auto content_view = dynamic_pointer_cast<TimelineContentView>(view);
 521
 522         _down_view.reset ();
 523
 524         if (content_view) {
 525                 _down_view = content_view;
 526                 _down_view_position = content_view->content()->position ();
 527         }
 528
 529         for (auto i: _views) {
 530                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 531                 if (!cv) {
 532                         continue;
 533                 }
 534
 535                 if (!ev.ShiftDown ()) {
 536                         cv->set_selected (view == i);
 537                 }
 538         }
 539
 540         if (content_view && ev.ShiftDown ()) {
 541                 content_view->set_selected (!content_view->selected ());
 542         }
 543
 544         _first_move = false;
 545
 546         if (_down_view) {
 547                 /* Pre-compute the points that we might snap to */
 548                 for (auto i: _views) {
 549                         auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 550                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 551                                 continue;
 552                         }
 553
 554                         auto film = _film.lock ();
 555                         DCPOMATIC_ASSERT (film);
 556
 557                         _start_snaps.push_back (cv->content()->position());
 558                         _end_snaps.push_back (cv->content()->position());
 559                         _start_snaps.push_back (cv->content()->end(film));
 560                         _end_snaps.push_back (cv->content()->end(film));
 561
 562                         for (auto i: cv->content()->reel_split_points(film)) {
 563                                 _start_snaps.push_back (i);
 564                         }
 565                 }
 566
 567                 /* Tell everyone that things might change frequently during the drag */
 568                 _down_view->content()->set_change_signals_frequent (true);
 569         }
 570 }
 571
 572 void
 573 Timeline::left_up (wxMouseEvent& ev)
 574 {
 575         _left_down = false;
 576
 577         switch (_tool) {
 578         case SELECT:
 579                 left_up_select (ev);
 580                 break;
 581         case ZOOM:
 582                 left_up_zoom (ev);
 583                 break;
 584         case ZOOM_ALL:
 585         case SNAP:
 586         case SEQUENCE:
 587                 break;
 588         }
 589 }
 590
 591 void
 592 Timeline::left_up_select (wxMouseEvent& ev)
 593 {
 594         if (_down_view) {
 595                 _down_view->content()->set_change_signals_frequent (false);
 596         }
 597
 598         _content_panel->set_selection (selected_content ());
 599         /* Since we may have just set change signals back to `not-frequent', we have to
 600            make sure this position change is signalled, even if the position value has
 601            not changed since the last time it was set (with frequent=true).  This is
 602            a bit of a hack.
 603         */
 604         set_position_from_event (ev, true);
 605
 606         /* Clear up up the stuff we don't do during drag */
 607         assign_tracks ();
 608         setup_scrollbars ();
 609         Refresh ();
 610
 611         _start_snaps.clear ();
 612         _end_snaps.clear ();
 613 }
 614
 615 void
 616 Timeline::left_up_zoom (wxMouseEvent& ev)
 617 {
 618         _zoom_point = ev.GetPosition ();
 619
 620         int vsx, vsy;
 621         _main_canvas->GetViewStart (&vsx, &vsy);
 622
 623         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 624         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 625
 626         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 627                 /* Very small zoom rectangle: we assume it wasn't intentional */
 628                 _zoom_point = optional<wxPoint> ();
 629                 Refresh ();
 630                 return;
 631         }
 632
 633         auto const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 634         auto const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 635         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 636
 637         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 638         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 639         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 640
 641         setup_scrollbars ();
 642         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 643         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 644         _labels_canvas->Scroll (0, y);
 645
 646         _zoom_point = optional<wxPoint> ();
 647         Refresh ();
 648 }
 649
 650 void
 651 Timeline::set_pixels_per_track (int h)
 652 {
 653         _pixels_per_track = max(_minimum_pixels_per_track, h);
 654 }
 655
 656 void
 657 Timeline::mouse_moved (wxMouseEvent& ev)
 658 {
 659         switch (_tool) {
 660         case SELECT:
 661                 mouse_moved_select (ev);
 662                 break;
 663         case ZOOM:
 664                 mouse_moved_zoom (ev);
 665                 break;
 666         case ZOOM_ALL:
 667         case SNAP:
 668         case SEQUENCE:
 669                 break;
 670         }
 671 }
 672
 673 void
 674 Timeline::mouse_moved_select (wxMouseEvent& ev)
 675 {
 676         if (!_left_down) {
 677                 return;
 678         }
 679
 680         set_position_from_event (ev);
 681 }
 682
 683 void
 684 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 685 {
 686         if (!_left_down) {
 687                 return;
 688         }
 689
 690         _zoom_point = ev.GetPosition ();
 691         Refresh ();
 692 }
 693
 694 void
 695 Timeline::right_down (wxMouseEvent& ev)
 696 {
 697         switch (_tool) {
 698         case SELECT:
 699                 right_down_select (ev);
 700                 break;
 701         case ZOOM:
 702                 /* Zoom out */
 703                 set_pixels_per_second (*_pixels_per_second / 2);
 704                 set_pixels_per_track (_pixels_per_track / 2);
 705                 setup_scrollbars ();
 706                 Refresh ();
 707                 break;
 708         case ZOOM_ALL:
 709         case SNAP:
 710         case SEQUENCE:
 711                 break;
 712         }
 713 }
 714
 715 void
 716 Timeline::right_down_select (wxMouseEvent& ev)
 717 {
 718         auto view = event_to_view (ev);
 719         auto cv = dynamic_pointer_cast<TimelineContentView> (view);
 720         if (!cv) {
 721                 return;
 722         }
 723
 724         if (!cv->selected ()) {
 725                 clear_selection ();
 726                 cv->set_selected (true);
 727         }
 728
 729         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 730 }
 731
 732 void
 733 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 734 {
 735         auto const d = a - b;
 736         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 737                 nearest_distance = d;
 738         }
 739 }
 740
 741 void
 742 Timeline::set_position_from_event (wxMouseEvent& ev, bool force_emit)
 743 {
 744         if (!_pixels_per_second) {
 745                 return;
 746         }
 747
 748         double const pps = _pixels_per_second.get ();
 749
 750         auto const p = ev.GetPosition();
 751
 752         if (!_first_move) {
 753                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 754                    before the drag is considered to have started.
 755                 */
 756                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 757                 if (dist < 8) {
 758                         return;
 759                 }
 760                 _first_move = true;
 761         }
 762
 763         if (!_down_view) {
 764                 return;
 765         }
 766
 767         auto new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 768
 769         auto film = _film.lock ();
 770         DCPOMATIC_ASSERT (film);
 771
 772         if (_snap) {
 773                 auto const new_end = new_position + _down_view->content()->length_after_trim(film);
 774                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 775                    positive is right).
 776                 */
 777                 optional<DCPTime> nearest_distance;
 778
 779                 /* Find the nearest snap point */
 780
 781                 for (auto i: _start_snaps) {
 782                         maybe_snap (i, new_position, nearest_distance);
 783                 }
 784
 785                 for (auto i: _end_snaps) {
 786                         maybe_snap (i, new_end, nearest_distance);
 787                 }
 788
 789                 if (nearest_distance) {
 790                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 791                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 792                                 new_position += nearest_distance.get ();
 793                         }
 794                 }
 795         }
 796
 797         if (new_position < DCPTime ()) {
 798                 new_position = DCPTime ();
 799         }
 800
 801         _down_view->content()->set_position (film, new_position, force_emit);
 802
 803         film->set_sequence (false);
 804 }
 805
 806 void
 807 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 808 {
 809         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 810 }
 811
 812 shared_ptr<const Film>
 813 Timeline::film () const
 814 {
 815         return _film.lock ();
 816 }
 817
 818 void
 819 Timeline::resized ()
 820 {
 821         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 822                 zoom_all ();
 823                 _first_resize = false;
 824         }
 825         setup_scrollbars ();
 826 }
 827
 828 void
 829 Timeline::clear_selection ()
 830 {
 831         for (auto i: _views) {
 832                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView>(i);
 833                 if (cv) {
 834                         cv->set_selected (false);
 835                 }
 836         }
 837 }
 838
 839 TimelineContentViewList
 840 Timeline::selected_views () const
 841 {
 842         TimelineContentViewList sel;
 843
 844         for (auto i: _views) {
 845                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 846                 if (cv && cv->selected()) {
 847                         sel.push_back (cv);
 848                 }
 849         }
 850
 851         return sel;
 852 }
 853
 854 ContentList
 855 Timeline::selected_content () const
 856 {
 857         ContentList sel;
 858
 859         for (auto i: selected_views()) {
 860                 sel.push_back(i->content());
 861         }
 862
 863         return sel;
 864 }
 865
 866 void
 867 Timeline::set_selection (ContentList selection)
 868 {
 869         for (auto i: _views) {
 870                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 871                 if (cv) {
 872                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 873                 }
 874         }
 875 }
 876
 877 int
 878 Timeline::tracks_y_offset () const
 879 {
 880         return _reels_view->bbox().height + 4;
 881 }
 882
 883 int
 884 Timeline::width () const
 885 {
 886         return _main_canvas->GetVirtualSize().GetWidth();
 887 }
 888
 889 void
 890 Timeline::scrolled (wxScrollWinEvent& ev)
 891 {
 892         if (ev.GetOrientation() == wxVERTICAL) {
 893                 int x, y;
 894                 _main_canvas->GetViewStart (&x, &y);
 895                 _labels_canvas->Scroll (0, y);
 896         }
 897         ev.Skip ();
 898 }
 899
 900 void
 901 Timeline::tool_clicked (Tool t)
 902 {
 903         switch (t) {
 904         case ZOOM:
 905         case SELECT:
 906                 _tool = t;
 907                 break;
 908         case ZOOM_ALL:
 909                 zoom_all ();
 910                 break;
 911         case SNAP:
 912         case SEQUENCE:
 913                 break;
 914         }
 915 }
 916
 917 void
 918 Timeline::zoom_all ()
 919 {
 920         auto film = _film.lock ();
 921         DCPOMATIC_ASSERT (film);
 922         set_pixels_per_second ((_main_canvas->GetSize().GetWidth() - 32) / film->length().seconds());
 923         set_pixels_per_track ((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / _tracks);
 924         setup_scrollbars ();
 925         _main_canvas->Scroll (0, 0);
 926         _labels_canvas->Scroll (0, 0);
 927         Refresh ();
 928 }