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 "content_panel.h"
  22 #include "film_editor.h"
  23 #include "film_viewer.h"
  24 #include "timeline.h"
  25 #include "timeline_atmos_content_view.h"
  26 #include "timeline_audio_content_view.h"
  27 #include "timeline_labels_view.h"
  28 #include "timeline_reels_view.h"
  29 #include "timeline_text_content_view.h"
  30 #include "timeline_time_axis_view.h"
  31 #include "timeline_video_content_view.h"
  32 #include "wx_util.h"
  33 #include "lib/atmos_mxf_content.h"
  34 #include "lib/audio_content.h"
  35 #include "lib/film.h"
  36 #include "lib/image_content.h"
  37 #include "lib/playlist.h"
  38 #include "lib/text_content.h"
  39 #include "lib/timer.h"
  40 #include "lib/video_content.h"
  41 #include <dcp/warnings.h>
  42 LIBDCP_DISABLE_WARNINGS
  43 #include <wx/graphics.h>
  44 LIBDCP_ENABLE_WARNINGS
  45 #include <iterator>
  46 #include <list>
  47
  48
  49 using std::abs;
  50 using std::dynamic_pointer_cast;
  51 using std::list;
  52 using std::make_shared;
  53 using std::max;
  54 using std::min;
  55 using std::shared_ptr;
  56 using std::weak_ptr;
  57 using boost::bind;
  58 using boost::optional;
  59 using namespace dcpomatic;
  60 #if BOOST_VERSION >= 106100
  61 using namespace boost::placeholders;
  62 #endif
  63
  64
  65 /* 3 hours in 640 pixels */
  66 double const Timeline::_minimum_pixels_per_second = 640.0 / (60 * 60 * 3);
  67 int const Timeline::_minimum_pixels_per_track = 16;
  68
  69
  70 Timeline::Timeline(wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film, FilmViewer& viewer)
  71         : wxPanel (parent, wxID_ANY)
  72         , _labels_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  73         , _main_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  74         , _content_panel (cp)
  75         , _film (film)
  76         , _viewer (viewer)
  77         , _time_axis_view (new TimelineTimeAxisView (*this, 64))
  78         , _reels_view (new TimelineReelsView (*this, 32))
  79         , _labels_view (new TimelineLabelsView (*this))
  80         , _tracks (0)
  81         , _left_down (false)
  82         , _down_view_position (0)
  83         , _first_move (false)
  84         , _menu (this, viewer)
  85         , _snap (true)
  86         , _tool (SELECT)
  87         , _x_scroll_rate (16)
  88         , _y_scroll_rate (16)
  89         , _pixels_per_track (48)
  90         , _first_resize (true)
  91         , _timer (this)
  92 {
  93 #ifndef __WXOSX__
  94         _labels_canvas->SetDoubleBuffered (true);
  95         _main_canvas->SetDoubleBuffered (true);
  96 #endif
  97
  98         auto sizer = new wxBoxSizer (wxHORIZONTAL);
  99         sizer->Add (_labels_canvas, 0, wxEXPAND);
 100         _labels_canvas->SetMinSize (wxSize (_labels_view->bbox().width, -1));
 101         sizer->Add (_main_canvas, 1, wxEXPAND);
 102         SetSizer (sizer);
 103
 104         _labels_canvas->Bind (wxEVT_PAINT,      boost::bind (&Timeline::paint_labels, this));
 105         _main_canvas->Bind   (wxEVT_PAINT,      boost::bind (&Timeline::paint_main,   this));
 106         _main_canvas->Bind   (wxEVT_LEFT_DOWN,  boost::bind (&Timeline::left_down,    this, _1));
 107         _main_canvas->Bind   (wxEVT_LEFT_UP,    boost::bind (&Timeline::left_up,      this, _1));
 108         _main_canvas->Bind   (wxEVT_RIGHT_DOWN, boost::bind (&Timeline::right_down,   this, _1));
 109         _main_canvas->Bind   (wxEVT_MOTION,     boost::bind (&Timeline::mouse_moved,  this, _1));
 110         _main_canvas->Bind   (wxEVT_SIZE,       boost::bind (&Timeline::resized,      this));
 111         _main_canvas->Bind   (wxEVT_SCROLLWIN_TOP,        boost::bind (&Timeline::scrolled,     this, _1));
 112         _main_canvas->Bind   (wxEVT_SCROLLWIN_BOTTOM,     boost::bind (&Timeline::scrolled,     this, _1));
 113         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 114         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 115         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 116         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 117         _main_canvas->Bind   (wxEVT_SCROLLWIN_THUMBTRACK, boost::bind (&Timeline::scrolled,     this, _1));
 118
 119         film_change (ChangeType::DONE, Film::Property::CONTENT);
 120
 121         SetMinSize (wxSize (640, 4 * pixels_per_track() + 96));
 122
 123         _film_changed_connection = film->Change.connect (bind (&Timeline::film_change, this, _1, _2));
 124         _film_content_change_connection = film->ContentChange.connect (bind (&Timeline::film_content_change, this, _1, _3, _4));
 125
 126         Bind (wxEVT_TIMER, boost::bind(&Timeline::update_playhead, this));
 127         _timer.Start (200, wxTIMER_CONTINUOUS);
 128
 129         setup_scrollbars ();
 130         _labels_canvas->ShowScrollbars (wxSHOW_SB_NEVER, wxSHOW_SB_NEVER);
 131 }
 132
 133
 134 void
 135 Timeline::update_playhead ()
 136 {
 137         Refresh ();
 138 }
 139
 140
 141 void
 142 Timeline::set_pixels_per_second (double pps)
 143 {
 144         _pixels_per_second = max (_minimum_pixels_per_second, pps);
 145 }
 146
 147
 148 void
 149 Timeline::paint_labels ()
 150 {
 151         wxPaintDC dc (_labels_canvas);
 152
 153         auto gc = wxGraphicsContext::Create (dc);
 154         if (!gc) {
 155                 return;
 156         }
 157
 158         int vsx, vsy;
 159         _labels_canvas->GetViewStart (&vsx, &vsy);
 160         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate + tracks_y_offset());
 161
 162         _labels_view->paint (gc, {});
 163
 164         delete gc;
 165 }
 166
 167
 168 void
 169 Timeline::paint_main ()
 170 {
 171         wxPaintDC dc (_main_canvas);
 172         _main_canvas->DoPrepareDC (dc);
 173
 174         auto gc = wxGraphicsContext::Create (dc);
 175         if (!gc) {
 176                 return;
 177         }
 178
 179         int vsx, vsy;
 180         _main_canvas->GetViewStart (&vsx, &vsy);
 181         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate);
 182
 183         gc->SetAntialiasMode (wxANTIALIAS_DEFAULT);
 184
 185         for (auto i: _views) {
 186
 187                 auto ic = dynamic_pointer_cast<TimelineContentView> (i);
 188
 189                 /* Find areas of overlap with other content views, so that we can plot them */
 190                 list<dcpomatic::Rect<int>> overlaps;
 191                 for (auto j: _views) {
 192                         auto jc = dynamic_pointer_cast<TimelineContentView> (j);
 193                         /* No overlap with non-content views, views on different tracks, audio views or non-active views */
 194                         if (!ic || !jc || i == j || ic->track() != jc->track() || ic->track().get_value_or(2) >= 2 || !ic->active() || !jc->active()) {
 195                                 continue;
 196                         }
 197
 198                         auto r = j->bbox().intersection(i->bbox());
 199                         if (r) {
 200                                 overlaps.push_back (r.get ());
 201                         }
 202                 }
 203
 204                 i->paint (gc, overlaps);
 205         }
 206
 207         if (_zoom_point) {
 208                 /* Translate back as _down_point and _zoom_point do not take scroll into account */
 209                 gc->Translate (vsx * _x_scroll_rate, vsy * _y_scroll_rate);
 210                 gc->SetPen(gui_is_dark() ? *wxWHITE_PEN : *wxBLACK_PEN);
 211                 gc->SetBrush (*wxTRANSPARENT_BRUSH);
 212                 gc->DrawRectangle (
 213                         min (_down_point.x, _zoom_point->x),
 214                         min (_down_point.y, _zoom_point->y),
 215                         abs (_down_point.x - _zoom_point->x),
 216                         abs (_down_point.y - _zoom_point->y)
 217                         );
 218         }
 219
 220         /* Playhead */
 221
 222         gc->SetPen (*wxRED_PEN);
 223         auto path = gc->CreatePath ();
 224         double const ph = _viewer.position().seconds() * pixels_per_second().get_value_or(0);
 225         path.MoveToPoint (ph, 0);
 226         path.AddLineToPoint (ph, pixels_per_track() * _tracks + 32);
 227         gc->StrokePath (path);
 228
 229         delete gc;
 230 }
 231
 232
 233 void
 234 Timeline::film_change (ChangeType type, Film::Property p)
 235 {
 236         if (type != ChangeType::DONE) {
 237                 return;
 238         }
 239
 240         if (p == Film::Property::CONTENT || p == Film::Property::REEL_TYPE || p == Film::Property::REEL_LENGTH) {
 241                 ensure_ui_thread ();
 242                 recreate_views ();
 243         } else if (p == Film::Property::CONTENT_ORDER) {
 244                 Refresh ();
 245         }
 246 }
 247
 248
 249 void
 250 Timeline::recreate_views ()
 251 {
 252         auto film = _film.lock ();
 253         if (!film) {
 254                 return;
 255         }
 256
 257         _views.clear ();
 258         _views.push_back (_time_axis_view);
 259         _views.push_back (_reels_view);
 260
 261         for (auto i: film->content ()) {
 262                 if (i->video) {
 263                         _views.push_back (make_shared<TimelineVideoContentView>(*this, i));
 264                 }
 265
 266                 if (i->audio && !i->audio->mapping().mapped_output_channels().empty ()) {
 267                         _views.push_back (make_shared<TimelineAudioContentView>(*this, i));
 268                 }
 269
 270                 for (auto j: i->text) {
 271                         _views.push_back (make_shared<TimelineTextContentView>(*this, i, j));
 272                 }
 273
 274                 if (i->atmos) {
 275                         _views.push_back (make_shared<TimelineAtmosContentView>(*this, i));
 276                 }
 277         }
 278
 279         assign_tracks ();
 280         setup_scrollbars ();
 281         Refresh ();
 282 }
 283
 284
 285 void
 286 Timeline::film_content_change (ChangeType type, int property, bool frequent)
 287 {
 288         if (type != ChangeType::DONE) {
 289                 return;
 290         }
 291
 292         ensure_ui_thread ();
 293
 294         if (property == AudioContentProperty::STREAMS || property == VideoContentProperty::FRAME_TYPE) {
 295                 recreate_views ();
 296         } else if (property == ContentProperty::POSITION || property == ContentProperty::LENGTH) {
 297                 _reels_view->force_redraw ();
 298         } else if (!frequent) {
 299                 setup_scrollbars ();
 300                 Refresh ();
 301         }
 302 }
 303
 304
 305 template <class T>
 306 int
 307 place (shared_ptr<const Film> film, TimelineViewList& views, int& tracks)
 308 {
 309         int const base = tracks;
 310
 311         for (auto i: views) {
 312                 if (!dynamic_pointer_cast<T>(i)) {
 313                         continue;
 314                 }
 315
 316                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 317
 318                 int t = base;
 319
 320                 auto content = cv->content();
 321                 DCPTimePeriod const content_period (content->position(), content->end(film));
 322
 323                 while (true) {
 324                         auto j = views.begin();
 325                         while (j != views.end()) {
 326                                 auto test = dynamic_pointer_cast<T> (*j);
 327                                 if (!test) {
 328                                         ++j;
 329                                         continue;
 330                                 }
 331
 332                                 auto test_content = test->content();
 333                                 if (
 334                                         test->track() && test->track().get() == t &&
 335                                         content_period.overlap(DCPTimePeriod(test_content->position(), test_content->end(film)))) {
 336                                         /* we have an overlap on track `t' */
 337                                         ++t;
 338                                         break;
 339                                 }
 340
 341                                 ++j;
 342                         }
 343
 344                         if (j == views.end ()) {
 345                                 /* no overlap on `t' */
 346                                 break;
 347                         }
 348                 }
 349
 350                 cv->set_track (t);
 351                 tracks = max (tracks, t + 1);
 352         }
 353
 354         return tracks - base;
 355 }
 356
 357
 358 /** Compare the mapped output channels of two TimelineViews, so we can into
 359  *  order of first mapped DCP channel.
 360  */
 361 struct AudioMappingComparator {
 362         bool operator()(shared_ptr<TimelineView> a, shared_ptr<TimelineView> b) {
 363                 int la = -1;
 364                 auto cva = dynamic_pointer_cast<TimelineAudioContentView>(a);
 365                 if (cva) {
 366                         auto oc = cva->content()->audio->mapping().mapped_output_channels();
 367                         la = *min_element(boost::begin(oc), boost::end(oc));
 368                 }
 369                 int lb = -1;
 370                 auto cvb = dynamic_pointer_cast<TimelineAudioContentView>(b);
 371                 if (cvb) {
 372                         auto oc = cvb->content()->audio->mapping().mapped_output_channels();
 373                         lb = *min_element(boost::begin(oc), boost::end(oc));
 374                 }
 375                 return la < lb;
 376         }
 377 };
 378
 379
 380 void
 381 Timeline::assign_tracks ()
 382 {
 383         /* Tracks are:
 384            Video 1
 385            Video 2
 386            Video N
 387            Text 1
 388            Text 2
 389            Text N
 390            Atmos
 391            Audio 1
 392            Audio 2
 393            Audio N
 394         */
 395
 396         auto film = _film.lock ();
 397         DCPOMATIC_ASSERT (film);
 398
 399         _tracks = 0;
 400
 401         for (auto i: _views) {
 402                 auto c = dynamic_pointer_cast<TimelineContentView>(i);
 403                 if (c) {
 404                         c->unset_track ();
 405                 }
 406         }
 407
 408         int const video_tracks = place<TimelineVideoContentView> (film, _views, _tracks);
 409         int const text_tracks = place<TimelineTextContentView> (film, _views, _tracks);
 410
 411         /* Atmos */
 412
 413         bool have_atmos = false;
 414         for (auto i: _views) {
 415                 auto cv = dynamic_pointer_cast<TimelineAtmosContentView>(i);
 416                 if (cv) {
 417                         cv->set_track (_tracks);
 418                         have_atmos = true;
 419                 }
 420         }
 421
 422         if (have_atmos) {
 423                 ++_tracks;
 424         }
 425
 426         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 427            DCP channel index.
 428         */
 429
 430         auto views = _views;
 431         sort(views.begin(), views.end(), AudioMappingComparator());
 432         int const audio_tracks = place<TimelineAudioContentView> (film, views, _tracks);
 433
 434         _labels_view->set_video_tracks (video_tracks);
 435         _labels_view->set_audio_tracks (audio_tracks);
 436         _labels_view->set_text_tracks (text_tracks);
 437         _labels_view->set_atmos (have_atmos);
 438
 439         _time_axis_view->set_y (tracks());
 440         _reels_view->set_y (8);
 441 }
 442
 443
 444 int
 445 Timeline::tracks () const
 446 {
 447         return _tracks;
 448 }
 449
 450
 451 void
 452 Timeline::setup_scrollbars ()
 453 {
 454         auto film = _film.lock ();
 455         if (!film || !_pixels_per_second) {
 456                 return;
 457         }
 458
 459         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 460
 461         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 462         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 463         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 464         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 465 }
 466
 467
 468 shared_ptr<TimelineView>
 469 Timeline::event_to_view (wxMouseEvent& ev)
 470 {
 471         /* Search backwards through views so that we find the uppermost one first */
 472         auto i = _views.rbegin();
 473
 474         int vsx, vsy;
 475         _main_canvas->GetViewStart (&vsx, &vsy);
 476         Position<int> const p (ev.GetX() + vsx * _x_scroll_rate, ev.GetY() + vsy * _y_scroll_rate);
 477
 478         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 479                 auto cv = dynamic_pointer_cast<TimelineContentView>(*i);
 480                 ++i;
 481         }
 482
 483         if (i == _views.rend ()) {
 484                 return {};
 485         }
 486
 487         return *i;
 488 }
 489
 490
 491 void
 492 Timeline::left_down (wxMouseEvent& ev)
 493 {
 494         _left_down = true;
 495         _down_point = ev.GetPosition ();
 496
 497         switch (_tool) {
 498         case SELECT:
 499                 left_down_select (ev);
 500                 break;
 501         case ZOOM:
 502         case ZOOM_ALL:
 503         case SNAP:
 504         case SEQUENCE:
 505                 /* Nothing to do */
 506                 break;
 507         }
 508 }
 509
 510
 511 void
 512 Timeline::left_down_select (wxMouseEvent& ev)
 513 {
 514         auto view = event_to_view (ev);
 515         auto content_view = dynamic_pointer_cast<TimelineContentView>(view);
 516
 517         _down_view.reset ();
 518
 519         if (content_view) {
 520                 _down_view = content_view;
 521                 _down_view_position = content_view->content()->position ();
 522         }
 523
 524         for (auto i: _views) {
 525                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 526                 if (!cv) {
 527                         continue;
 528                 }
 529
 530                 if (!ev.ShiftDown ()) {
 531                         cv->set_selected (view == i);
 532                 }
 533         }
 534
 535         if (content_view && ev.ShiftDown ()) {
 536                 content_view->set_selected (!content_view->selected ());
 537         }
 538
 539         _first_move = false;
 540
 541         if (_down_view) {
 542                 /* Pre-compute the points that we might snap to */
 543                 for (auto i: _views) {
 544                         auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 545                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 546                                 continue;
 547                         }
 548
 549                         auto film = _film.lock ();
 550                         DCPOMATIC_ASSERT (film);
 551
 552                         _start_snaps.push_back (cv->content()->position());
 553                         _end_snaps.push_back (cv->content()->position());
 554                         _start_snaps.push_back (cv->content()->end(film));
 555                         _end_snaps.push_back (cv->content()->end(film));
 556
 557                         for (auto i: cv->content()->reel_split_points(film)) {
 558                                 _start_snaps.push_back (i);
 559                         }
 560                 }
 561
 562                 /* Tell everyone that things might change frequently during the drag */
 563                 _down_view->content()->set_change_signals_frequent (true);
 564         }
 565 }
 566
 567
 568 void
 569 Timeline::left_up (wxMouseEvent& ev)
 570 {
 571         _left_down = false;
 572
 573         switch (_tool) {
 574         case SELECT:
 575                 left_up_select (ev);
 576                 break;
 577         case ZOOM:
 578                 left_up_zoom (ev);
 579                 break;
 580         case ZOOM_ALL:
 581         case SNAP:
 582         case SEQUENCE:
 583                 break;
 584         }
 585 }
 586
 587
 588 void
 589 Timeline::left_up_select (wxMouseEvent& ev)
 590 {
 591         if (_down_view) {
 592                 _down_view->content()->set_change_signals_frequent (false);
 593         }
 594
 595         _content_panel->set_selection (selected_content ());
 596         /* Since we may have just set change signals back to `not-frequent', we have to
 597            make sure this position change is signalled, even if the position value has
 598            not changed since the last time it was set (with frequent=true).  This is
 599            a bit of a hack.
 600         */
 601         set_position_from_event (ev, true);
 602
 603         /* Clear up up the stuff we don't do during drag */
 604         assign_tracks ();
 605         setup_scrollbars ();
 606         Refresh ();
 607
 608         _start_snaps.clear ();
 609         _end_snaps.clear ();
 610 }
 611
 612
 613 void
 614 Timeline::left_up_zoom (wxMouseEvent& ev)
 615 {
 616         _zoom_point = ev.GetPosition ();
 617
 618         int vsx, vsy;
 619         _main_canvas->GetViewStart (&vsx, &vsy);
 620
 621         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 622         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 623
 624         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 625                 /* Very small zoom rectangle: we assume it wasn't intentional */
 626                 _zoom_point = optional<wxPoint> ();
 627                 Refresh ();
 628                 return;
 629         }
 630
 631         auto const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 632         auto const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 633         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 634
 635         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 636         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 637         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 638
 639         setup_scrollbars ();
 640         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 641         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 642         _labels_canvas->Scroll (0, y);
 643
 644         _zoom_point = optional<wxPoint> ();
 645         Refresh ();
 646 }
 647
 648
 649 void
 650 Timeline::set_pixels_per_track (int h)
 651 {
 652         _pixels_per_track = max(_minimum_pixels_per_track, h);
 653 }
 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
 674 void
 675 Timeline::mouse_moved_select (wxMouseEvent& ev)
 676 {
 677         if (!_left_down) {
 678                 return;
 679         }
 680
 681         set_position_from_event (ev);
 682 }
 683
 684
 685 void
 686 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 687 {
 688         if (!_left_down) {
 689                 return;
 690         }
 691
 692         _zoom_point = ev.GetPosition ();
 693         Refresh ();
 694 }
 695
 696
 697 void
 698 Timeline::right_down (wxMouseEvent& ev)
 699 {
 700         switch (_tool) {
 701         case SELECT:
 702                 right_down_select (ev);
 703                 break;
 704         case ZOOM:
 705                 /* Zoom out */
 706                 set_pixels_per_second (*_pixels_per_second / 2);
 707                 set_pixels_per_track (_pixels_per_track / 2);
 708                 setup_scrollbars ();
 709                 Refresh ();
 710                 break;
 711         case ZOOM_ALL:
 712         case SNAP:
 713         case SEQUENCE:
 714                 break;
 715         }
 716 }
 717
 718
 719 void
 720 Timeline::right_down_select (wxMouseEvent& ev)
 721 {
 722         auto view = event_to_view (ev);
 723         auto cv = dynamic_pointer_cast<TimelineContentView> (view);
 724         if (!cv) {
 725                 return;
 726         }
 727
 728         if (!cv->selected ()) {
 729                 clear_selection ();
 730                 cv->set_selected (true);
 731         }
 732
 733         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 734 }
 735
 736
 737 void
 738 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 739 {
 740         auto const d = a - b;
 741         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 742                 nearest_distance = d;
 743         }
 744 }
 745
 746
 747 void
 748 Timeline::set_position_from_event (wxMouseEvent& ev, bool force_emit)
 749 {
 750         if (!_pixels_per_second) {
 751                 return;
 752         }
 753
 754         double const pps = _pixels_per_second.get ();
 755
 756         auto const p = ev.GetPosition();
 757
 758         if (!_first_move) {
 759                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 760                    before the drag is considered to have started.
 761                 */
 762                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 763                 if (dist < 8) {
 764                         return;
 765                 }
 766                 _first_move = true;
 767         }
 768
 769         if (!_down_view) {
 770                 return;
 771         }
 772
 773         auto new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 774
 775         auto film = _film.lock ();
 776         DCPOMATIC_ASSERT (film);
 777
 778         if (_snap) {
 779                 auto const new_end = new_position + _down_view->content()->length_after_trim(film);
 780                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 781                    positive is right).
 782                 */
 783                 optional<DCPTime> nearest_distance;
 784
 785                 /* Find the nearest snap point */
 786
 787                 for (auto i: _start_snaps) {
 788                         maybe_snap (i, new_position, nearest_distance);
 789                 }
 790
 791                 for (auto i: _end_snaps) {
 792                         maybe_snap (i, new_end, nearest_distance);
 793                 }
 794
 795                 if (nearest_distance) {
 796                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 797                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 798                                 new_position += nearest_distance.get ();
 799                         }
 800                 }
 801         }
 802
 803         if (new_position < DCPTime ()) {
 804                 new_position = DCPTime ();
 805         }
 806
 807         _down_view->content()->set_position (film, new_position, force_emit);
 808
 809         film->set_sequence (false);
 810 }
 811
 812
 813 void
 814 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 815 {
 816         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 817 }
 818
 819
 820 shared_ptr<const Film>
 821 Timeline::film () const
 822 {
 823         return _film.lock ();
 824 }
 825
 826
 827 void
 828 Timeline::resized ()
 829 {
 830         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 831                 zoom_all ();
 832                 _first_resize = false;
 833         }
 834         setup_scrollbars ();
 835 }
 836
 837
 838 void
 839 Timeline::clear_selection ()
 840 {
 841         for (auto i: _views) {
 842                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView>(i);
 843                 if (cv) {
 844                         cv->set_selected (false);
 845                 }
 846         }
 847 }
 848
 849
 850 TimelineContentViewList
 851 Timeline::selected_views () const
 852 {
 853         TimelineContentViewList sel;
 854
 855         for (auto i: _views) {
 856                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 857                 if (cv && cv->selected()) {
 858                         sel.push_back (cv);
 859                 }
 860         }
 861
 862         return sel;
 863 }
 864
 865
 866 ContentList
 867 Timeline::selected_content () const
 868 {
 869         ContentList sel;
 870
 871         for (auto i: selected_views()) {
 872                 sel.push_back(i->content());
 873         }
 874
 875         return sel;
 876 }
 877
 878
 879 void
 880 Timeline::set_selection (ContentList selection)
 881 {
 882         for (auto i: _views) {
 883                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 884                 if (cv) {
 885                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 886                 }
 887         }
 888 }
 889
 890
 891 int
 892 Timeline::tracks_y_offset () const
 893 {
 894         return _reels_view->bbox().height + 4;
 895 }
 896
 897
 898 int
 899 Timeline::width () const
 900 {
 901         return _main_canvas->GetVirtualSize().GetWidth();
 902 }
 903
 904
 905 void
 906 Timeline::scrolled (wxScrollWinEvent& ev)
 907 {
 908         if (ev.GetOrientation() == wxVERTICAL) {
 909                 int x, y;
 910                 _main_canvas->GetViewStart (&x, &y);
 911                 _labels_canvas->Scroll (0, y);
 912         }
 913         ev.Skip ();
 914 }
 915
 916
 917 void
 918 Timeline::tool_clicked (Tool t)
 919 {
 920         switch (t) {
 921         case ZOOM:
 922         case SELECT:
 923                 _tool = t;
 924                 break;
 925         case ZOOM_ALL:
 926                 zoom_all ();
 927                 break;
 928         case SNAP:
 929         case SEQUENCE:
 930                 break;
 931         }
 932 }
 933
 934
 935 void
 936 Timeline::zoom_all ()
 937 {
 938         auto film = _film.lock ();
 939         DCPOMATIC_ASSERT (film);
 940         set_pixels_per_second ((_main_canvas->GetSize().GetWidth() - 32) / film->length().seconds());
 941         set_pixels_per_track ((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / _tracks);
 942         setup_scrollbars ();
 943         _main_canvas->Scroll (0, 0);
 944         _labels_canvas->Scroll (0, 0);
 945         Refresh ();
 946 }