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 1
 374            Video 2
 375            Video N
 376            Text 1
 377            Text 2
 378            Text N
 379            Atmos
 380            Audio 1
 381            Audio 2
 382            Audio N
 383         */
 384
 385         auto film = _film.lock ();
 386         DCPOMATIC_ASSERT (film);
 387
 388         _tracks = 0;
 389
 390         for (auto i: _views) {
 391                 auto c = dynamic_pointer_cast<TimelineContentView>(i);
 392                 if (c) {
 393                         c->unset_track ();
 394                 }
 395         }
 396
 397         int const video_tracks = place<TimelineVideoContentView> (film, _views, _tracks);
 398         int const text_tracks = place<TimelineTextContentView> (film, _views, _tracks);
 399
 400         /* Atmos */
 401
 402         bool have_atmos = false;
 403         for (auto i: _views) {
 404                 auto cv = dynamic_pointer_cast<TimelineAtmosContentView>(i);
 405                 if (cv) {
 406                         cv->set_track (_tracks);
 407                         have_atmos = true;
 408                 }
 409         }
 410
 411         if (have_atmos) {
 412                 ++_tracks;
 413         }
 414
 415         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 416            DCP channel index.
 417         */
 418
 419         auto views = _views;
 420         sort(views.begin(), views.end(), AudioMappingComparator());
 421         int const audio_tracks = place<TimelineAudioContentView> (film, views, _tracks);
 422
 423         _labels_view->set_video_tracks (video_tracks);
 424         _labels_view->set_audio_tracks (audio_tracks);
 425         _labels_view->set_text_tracks (text_tracks);
 426         _labels_view->set_atmos (have_atmos);
 427
 428         _time_axis_view->set_y (tracks());
 429         _reels_view->set_y (8);
 430 }
 431
 432 int
 433 Timeline::tracks () const
 434 {
 435         return _tracks;
 436 }
 437
 438 void
 439 Timeline::setup_scrollbars ()
 440 {
 441         auto film = _film.lock ();
 442         if (!film || !_pixels_per_second) {
 443                 return;
 444         }
 445
 446         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 447
 448         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 449         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 450         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 451         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 452 }
 453
 454 shared_ptr<TimelineView>
 455 Timeline::event_to_view (wxMouseEvent& ev)
 456 {
 457         /* Search backwards through views so that we find the uppermost one first */
 458         auto i = _views.rbegin();
 459
 460         int vsx, vsy;
 461         _main_canvas->GetViewStart (&vsx, &vsy);
 462         Position<int> const p (ev.GetX() + vsx * _x_scroll_rate, ev.GetY() + vsy * _y_scroll_rate);
 463
 464         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 465                 auto cv = dynamic_pointer_cast<TimelineContentView>(*i);
 466                 ++i;
 467         }
 468
 469         if (i == _views.rend ()) {
 470                 return {};
 471         }
 472
 473         return *i;
 474 }
 475
 476 void
 477 Timeline::left_down (wxMouseEvent& ev)
 478 {
 479         _left_down = true;
 480         _down_point = ev.GetPosition ();
 481
 482         switch (_tool) {
 483         case SELECT:
 484                 left_down_select (ev);
 485                 break;
 486         case ZOOM:
 487         case ZOOM_ALL:
 488         case SNAP:
 489         case SEQUENCE:
 490                 /* Nothing to do */
 491                 break;
 492         }
 493 }
 494
 495 void
 496 Timeline::left_down_select (wxMouseEvent& ev)
 497 {
 498         auto view = event_to_view (ev);
 499         auto content_view = dynamic_pointer_cast<TimelineContentView>(view);
 500
 501         _down_view.reset ();
 502
 503         if (content_view) {
 504                 _down_view = content_view;
 505                 _down_view_position = content_view->content()->position ();
 506         }
 507
 508         for (auto i: _views) {
 509                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 510                 if (!cv) {
 511                         continue;
 512                 }
 513
 514                 if (!ev.ShiftDown ()) {
 515                         cv->set_selected (view == i);
 516                 }
 517         }
 518
 519         if (content_view && ev.ShiftDown ()) {
 520                 content_view->set_selected (!content_view->selected ());
 521         }
 522
 523         _first_move = false;
 524
 525         if (_down_view) {
 526                 /* Pre-compute the points that we might snap to */
 527                 for (auto i: _views) {
 528                         auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 529                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 530                                 continue;
 531                         }
 532
 533                         auto film = _film.lock ();
 534                         DCPOMATIC_ASSERT (film);
 535
 536                         _start_snaps.push_back (cv->content()->position());
 537                         _end_snaps.push_back (cv->content()->position());
 538                         _start_snaps.push_back (cv->content()->end(film));
 539                         _end_snaps.push_back (cv->content()->end(film));
 540
 541                         for (auto i: cv->content()->reel_split_points(film)) {
 542                                 _start_snaps.push_back (i);
 543                         }
 544                 }
 545
 546                 /* Tell everyone that things might change frequently during the drag */
 547                 _down_view->content()->set_change_signals_frequent (true);
 548         }
 549 }
 550
 551 void
 552 Timeline::left_up (wxMouseEvent& ev)
 553 {
 554         _left_down = false;
 555
 556         switch (_tool) {
 557         case SELECT:
 558                 left_up_select (ev);
 559                 break;
 560         case ZOOM:
 561                 left_up_zoom (ev);
 562                 break;
 563         case ZOOM_ALL:
 564         case SNAP:
 565         case SEQUENCE:
 566                 break;
 567         }
 568 }
 569
 570 void
 571 Timeline::left_up_select (wxMouseEvent& ev)
 572 {
 573         if (_down_view) {
 574                 _down_view->content()->set_change_signals_frequent (false);
 575         }
 576
 577         _content_panel->set_selection (selected_content ());
 578         /* Since we may have just set change signals back to `not-frequent', we have to
 579            make sure this position change is signalled, even if the position value has
 580            not changed since the last time it was set (with frequent=true).  This is
 581            a bit of a hack.
 582         */
 583         set_position_from_event (ev, true);
 584
 585         /* Clear up up the stuff we don't do during drag */
 586         assign_tracks ();
 587         setup_scrollbars ();
 588         Refresh ();
 589
 590         _start_snaps.clear ();
 591         _end_snaps.clear ();
 592 }
 593
 594 void
 595 Timeline::left_up_zoom (wxMouseEvent& ev)
 596 {
 597         _zoom_point = ev.GetPosition ();
 598
 599         int vsx, vsy;
 600         _main_canvas->GetViewStart (&vsx, &vsy);
 601
 602         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 603         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 604
 605         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 606                 /* Very small zoom rectangle: we assume it wasn't intentional */
 607                 _zoom_point = optional<wxPoint> ();
 608                 Refresh ();
 609                 return;
 610         }
 611
 612         auto const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 613         auto const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 614         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 615
 616         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 617         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 618         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 619
 620         setup_scrollbars ();
 621         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 622         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 623         _labels_canvas->Scroll (0, y);
 624
 625         _zoom_point = optional<wxPoint> ();
 626         Refresh ();
 627 }
 628
 629 void
 630 Timeline::set_pixels_per_track (int h)
 631 {
 632         _pixels_per_track = max(_minimum_pixels_per_track, h);
 633 }
 634
 635 void
 636 Timeline::mouse_moved (wxMouseEvent& ev)
 637 {
 638         switch (_tool) {
 639         case SELECT:
 640                 mouse_moved_select (ev);
 641                 break;
 642         case ZOOM:
 643                 mouse_moved_zoom (ev);
 644                 break;
 645         case ZOOM_ALL:
 646         case SNAP:
 647         case SEQUENCE:
 648                 break;
 649         }
 650 }
 651
 652 void
 653 Timeline::mouse_moved_select (wxMouseEvent& ev)
 654 {
 655         if (!_left_down) {
 656                 return;
 657         }
 658
 659         set_position_from_event (ev);
 660 }
 661
 662 void
 663 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 664 {
 665         if (!_left_down) {
 666                 return;
 667         }
 668
 669         _zoom_point = ev.GetPosition ();
 670         Refresh ();
 671 }
 672
 673 void
 674 Timeline::right_down (wxMouseEvent& ev)
 675 {
 676         switch (_tool) {
 677         case SELECT:
 678                 right_down_select (ev);
 679                 break;
 680         case ZOOM:
 681                 /* Zoom out */
 682                 set_pixels_per_second (*_pixels_per_second / 2);
 683                 set_pixels_per_track (_pixels_per_track / 2);
 684                 setup_scrollbars ();
 685                 Refresh ();
 686                 break;
 687         case ZOOM_ALL:
 688         case SNAP:
 689         case SEQUENCE:
 690                 break;
 691         }
 692 }
 693
 694 void
 695 Timeline::right_down_select (wxMouseEvent& ev)
 696 {
 697         auto view = event_to_view (ev);
 698         auto cv = dynamic_pointer_cast<TimelineContentView> (view);
 699         if (!cv) {
 700                 return;
 701         }
 702
 703         if (!cv->selected ()) {
 704                 clear_selection ();
 705                 cv->set_selected (true);
 706         }
 707
 708         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 709 }
 710
 711 void
 712 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 713 {
 714         auto const d = a - b;
 715         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 716                 nearest_distance = d;
 717         }
 718 }
 719
 720 void
 721 Timeline::set_position_from_event (wxMouseEvent& ev, bool force_emit)
 722 {
 723         if (!_pixels_per_second) {
 724                 return;
 725         }
 726
 727         double const pps = _pixels_per_second.get ();
 728
 729         auto const p = ev.GetPosition();
 730
 731         if (!_first_move) {
 732                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 733                    before the drag is considered to have started.
 734                 */
 735                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 736                 if (dist < 8) {
 737                         return;
 738                 }
 739                 _first_move = true;
 740         }
 741
 742         if (!_down_view) {
 743                 return;
 744         }
 745
 746         auto new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 747
 748         auto film = _film.lock ();
 749         DCPOMATIC_ASSERT (film);
 750
 751         if (_snap) {
 752                 auto const new_end = new_position + _down_view->content()->length_after_trim(film);
 753                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 754                    positive is right).
 755                 */
 756                 optional<DCPTime> nearest_distance;
 757
 758                 /* Find the nearest snap point */
 759
 760                 for (auto i: _start_snaps) {
 761                         maybe_snap (i, new_position, nearest_distance);
 762                 }
 763
 764                 for (auto i: _end_snaps) {
 765                         maybe_snap (i, new_end, nearest_distance);
 766                 }
 767
 768                 if (nearest_distance) {
 769                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 770                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 771                                 new_position += nearest_distance.get ();
 772                         }
 773                 }
 774         }
 775
 776         if (new_position < DCPTime ()) {
 777                 new_position = DCPTime ();
 778         }
 779
 780         _down_view->content()->set_position (film, new_position, force_emit);
 781
 782         film->set_sequence (false);
 783 }
 784
 785 void
 786 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 787 {
 788         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 789 }
 790
 791 shared_ptr<const Film>
 792 Timeline::film () const
 793 {
 794         return _film.lock ();
 795 }
 796
 797 void
 798 Timeline::resized ()
 799 {
 800         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 801                 zoom_all ();
 802                 _first_resize = false;
 803         }
 804         setup_scrollbars ();
 805 }
 806
 807 void
 808 Timeline::clear_selection ()
 809 {
 810         for (auto i: _views) {
 811                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView>(i);
 812                 if (cv) {
 813                         cv->set_selected (false);
 814                 }
 815         }
 816 }
 817
 818 TimelineContentViewList
 819 Timeline::selected_views () const
 820 {
 821         TimelineContentViewList sel;
 822
 823         for (auto i: _views) {
 824                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 825                 if (cv && cv->selected()) {
 826                         sel.push_back (cv);
 827                 }
 828         }
 829
 830         return sel;
 831 }
 832
 833 ContentList
 834 Timeline::selected_content () const
 835 {
 836         ContentList sel;
 837
 838         for (auto i: selected_views()) {
 839                 sel.push_back(i->content());
 840         }
 841
 842         return sel;
 843 }
 844
 845 void
 846 Timeline::set_selection (ContentList selection)
 847 {
 848         for (auto i: _views) {
 849                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 850                 if (cv) {
 851                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 852                 }
 853         }
 854 }
 855
 856 int
 857 Timeline::tracks_y_offset () const
 858 {
 859         return _reels_view->bbox().height + 4;
 860 }
 861
 862 int
 863 Timeline::width () const
 864 {
 865         return _main_canvas->GetVirtualSize().GetWidth();
 866 }
 867
 868 void
 869 Timeline::scrolled (wxScrollWinEvent& ev)
 870 {
 871         if (ev.GetOrientation() == wxVERTICAL) {
 872                 int x, y;
 873                 _main_canvas->GetViewStart (&x, &y);
 874                 _labels_canvas->Scroll (0, y);
 875         }
 876         ev.Skip ();
 877 }
 878
 879 void
 880 Timeline::tool_clicked (Tool t)
 881 {
 882         switch (t) {
 883         case ZOOM:
 884         case SELECT:
 885                 _tool = t;
 886                 break;
 887         case ZOOM_ALL:
 888                 zoom_all ();
 889                 break;
 890         case SNAP:
 891         case SEQUENCE:
 892                 break;
 893         }
 894 }
 895
 896 void
 897 Timeline::zoom_all ()
 898 {
 899         auto film = _film.lock ();
 900         DCPOMATIC_ASSERT (film);
 901         set_pixels_per_second ((_main_canvas->GetSize().GetWidth() - 32) / film->length().seconds());
 902         set_pixels_per_track ((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / _tracks);
 903         setup_scrollbars ();
 904         _main_canvas->Scroll (0, 0);
 905         _labels_canvas->Scroll (0, 0);
 906         Refresh ();
 907 }