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                 ++i;
 480         }
 481
 482         if (i == _views.rend ()) {
 483                 return {};
 484         }
 485
 486         return *i;
 487 }
 488
 489
 490 void
 491 Timeline::left_down (wxMouseEvent& ev)
 492 {
 493         _left_down = true;
 494         _down_point = ev.GetPosition ();
 495
 496         switch (_tool) {
 497         case SELECT:
 498                 left_down_select (ev);
 499                 break;
 500         case ZOOM:
 501         case ZOOM_ALL:
 502         case SNAP:
 503         case SEQUENCE:
 504                 /* Nothing to do */
 505                 break;
 506         }
 507 }
 508
 509
 510 void
 511 Timeline::left_down_select (wxMouseEvent& ev)
 512 {
 513         auto view = event_to_view (ev);
 514         auto content_view = dynamic_pointer_cast<TimelineContentView>(view);
 515
 516         _down_view.reset ();
 517
 518         if (content_view) {
 519                 _down_view = content_view;
 520                 _down_view_position = content_view->content()->position ();
 521         }
 522
 523         if (dynamic_pointer_cast<TimelineTimeAxisView>(view)) {
 524                 int vsx, vsy;
 525                 _main_canvas->GetViewStart(&vsx, &vsy);
 526                 _viewer.seek(DCPTime::from_seconds((ev.GetPosition().x + vsx * _x_scroll_rate) / _pixels_per_second.get_value_or(1)), true);
 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
 573 void
 574 Timeline::left_up (wxMouseEvent& ev)
 575 {
 576         _left_down = false;
 577
 578         switch (_tool) {
 579         case SELECT:
 580                 left_up_select (ev);
 581                 break;
 582         case ZOOM:
 583                 left_up_zoom (ev);
 584                 break;
 585         case ZOOM_ALL:
 586         case SNAP:
 587         case SEQUENCE:
 588                 break;
 589         }
 590 }
 591
 592
 593 void
 594 Timeline::left_up_select (wxMouseEvent& ev)
 595 {
 596         if (_down_view) {
 597                 _down_view->content()->set_change_signals_frequent (false);
 598         }
 599
 600         _content_panel->set_selection (selected_content ());
 601         /* Since we may have just set change signals back to `not-frequent', we have to
 602            make sure this position change is signalled, even if the position value has
 603            not changed since the last time it was set (with frequent=true).  This is
 604            a bit of a hack.
 605         */
 606         set_position_from_event (ev, true);
 607
 608         /* Clear up up the stuff we don't do during drag */
 609         assign_tracks ();
 610         setup_scrollbars ();
 611         Refresh ();
 612
 613         _start_snaps.clear ();
 614         _end_snaps.clear ();
 615 }
 616
 617
 618 void
 619 Timeline::left_up_zoom (wxMouseEvent& ev)
 620 {
 621         _zoom_point = ev.GetPosition ();
 622
 623         int vsx, vsy;
 624         _main_canvas->GetViewStart (&vsx, &vsy);
 625
 626         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 627         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 628
 629         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 630                 /* Very small zoom rectangle: we assume it wasn't intentional */
 631                 _zoom_point = optional<wxPoint> ();
 632                 Refresh ();
 633                 return;
 634         }
 635
 636         auto const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 637         auto const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 638         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 639
 640         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 641         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 642         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 643
 644         setup_scrollbars ();
 645         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 646         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 647         _labels_canvas->Scroll (0, y);
 648
 649         _zoom_point = optional<wxPoint> ();
 650         Refresh ();
 651 }
 652
 653
 654 void
 655 Timeline::set_pixels_per_track (int h)
 656 {
 657         _pixels_per_track = max(_minimum_pixels_per_track, h);
 658 }
 659
 660
 661 void
 662 Timeline::mouse_moved (wxMouseEvent& ev)
 663 {
 664         switch (_tool) {
 665         case SELECT:
 666                 mouse_moved_select (ev);
 667                 break;
 668         case ZOOM:
 669                 mouse_moved_zoom (ev);
 670                 break;
 671         case ZOOM_ALL:
 672         case SNAP:
 673         case SEQUENCE:
 674                 break;
 675         }
 676 }
 677
 678
 679 void
 680 Timeline::mouse_moved_select (wxMouseEvent& ev)
 681 {
 682         if (!_left_down) {
 683                 return;
 684         }
 685
 686         set_position_from_event (ev);
 687 }
 688
 689
 690 void
 691 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 692 {
 693         if (!_left_down) {
 694                 return;
 695         }
 696
 697         _zoom_point = ev.GetPosition ();
 698         Refresh ();
 699 }
 700
 701
 702 void
 703 Timeline::right_down (wxMouseEvent& ev)
 704 {
 705         switch (_tool) {
 706         case SELECT:
 707                 right_down_select (ev);
 708                 break;
 709         case ZOOM:
 710                 /* Zoom out */
 711                 set_pixels_per_second (*_pixels_per_second / 2);
 712                 set_pixels_per_track (_pixels_per_track / 2);
 713                 setup_scrollbars ();
 714                 Refresh ();
 715                 break;
 716         case ZOOM_ALL:
 717         case SNAP:
 718         case SEQUENCE:
 719                 break;
 720         }
 721 }
 722
 723
 724 void
 725 Timeline::right_down_select (wxMouseEvent& ev)
 726 {
 727         auto view = event_to_view (ev);
 728         auto cv = dynamic_pointer_cast<TimelineContentView> (view);
 729         if (!cv) {
 730                 return;
 731         }
 732
 733         if (!cv->selected ()) {
 734                 clear_selection ();
 735                 cv->set_selected (true);
 736         }
 737
 738         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 739 }
 740
 741
 742 void
 743 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 744 {
 745         auto const d = a - b;
 746         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 747                 nearest_distance = d;
 748         }
 749 }
 750
 751
 752 void
 753 Timeline::set_position_from_event (wxMouseEvent& ev, bool force_emit)
 754 {
 755         if (!_pixels_per_second) {
 756                 return;
 757         }
 758
 759         double const pps = _pixels_per_second.get ();
 760
 761         auto const p = ev.GetPosition();
 762
 763         if (!_first_move) {
 764                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 765                    before the drag is considered to have started.
 766                 */
 767                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 768                 if (dist < 8) {
 769                         return;
 770                 }
 771                 _first_move = true;
 772         }
 773
 774         if (!_down_view) {
 775                 return;
 776         }
 777
 778         auto new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 779
 780         auto film = _film.lock ();
 781         DCPOMATIC_ASSERT (film);
 782
 783         if (_snap) {
 784                 auto const new_end = new_position + _down_view->content()->length_after_trim(film);
 785                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 786                    positive is right).
 787                 */
 788                 optional<DCPTime> nearest_distance;
 789
 790                 /* Find the nearest snap point */
 791
 792                 for (auto i: _start_snaps) {
 793                         maybe_snap (i, new_position, nearest_distance);
 794                 }
 795
 796                 for (auto i: _end_snaps) {
 797                         maybe_snap (i, new_end, nearest_distance);
 798                 }
 799
 800                 if (nearest_distance) {
 801                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 802                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 803                                 new_position += nearest_distance.get ();
 804                         }
 805                 }
 806         }
 807
 808         if (new_position < DCPTime ()) {
 809                 new_position = DCPTime ();
 810         }
 811
 812         _down_view->content()->set_position (film, new_position, force_emit);
 813
 814         film->set_sequence (false);
 815 }
 816
 817
 818 void
 819 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 820 {
 821         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 822 }
 823
 824
 825 shared_ptr<const Film>
 826 Timeline::film () const
 827 {
 828         return _film.lock ();
 829 }
 830
 831
 832 void
 833 Timeline::resized ()
 834 {
 835         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 836                 zoom_all ();
 837                 _first_resize = false;
 838         }
 839         setup_scrollbars ();
 840 }
 841
 842
 843 void
 844 Timeline::clear_selection ()
 845 {
 846         for (auto i: _views) {
 847                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView>(i);
 848                 if (cv) {
 849                         cv->set_selected (false);
 850                 }
 851         }
 852 }
 853
 854
 855 TimelineContentViewList
 856 Timeline::selected_views () const
 857 {
 858         TimelineContentViewList sel;
 859
 860         for (auto i: _views) {
 861                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 862                 if (cv && cv->selected()) {
 863                         sel.push_back (cv);
 864                 }
 865         }
 866
 867         return sel;
 868 }
 869
 870
 871 ContentList
 872 Timeline::selected_content () const
 873 {
 874         ContentList sel;
 875
 876         for (auto i: selected_views()) {
 877                 sel.push_back(i->content());
 878         }
 879
 880         return sel;
 881 }
 882
 883
 884 void
 885 Timeline::set_selection (ContentList selection)
 886 {
 887         for (auto i: _views) {
 888                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 889                 if (cv) {
 890                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 891                 }
 892         }
 893 }
 894
 895
 896 int
 897 Timeline::tracks_y_offset () const
 898 {
 899         return _reels_view->bbox().height + 4;
 900 }
 901
 902
 903 int
 904 Timeline::width () const
 905 {
 906         return _main_canvas->GetVirtualSize().GetWidth();
 907 }
 908
 909
 910 void
 911 Timeline::scrolled (wxScrollWinEvent& ev)
 912 {
 913         if (ev.GetOrientation() == wxVERTICAL) {
 914                 int x, y;
 915                 _main_canvas->GetViewStart (&x, &y);
 916                 _labels_canvas->Scroll (0, y);
 917         }
 918         ev.Skip ();
 919 }
 920
 921
 922 void
 923 Timeline::tool_clicked (Tool t)
 924 {
 925         switch (t) {
 926         case ZOOM:
 927         case SELECT:
 928                 _tool = t;
 929                 break;
 930         case ZOOM_ALL:
 931                 zoom_all ();
 932                 break;
 933         case SNAP:
 934         case SEQUENCE:
 935                 break;
 936         }
 937 }
 938
 939
 940 void
 941 Timeline::zoom_all ()
 942 {
 943         auto film = _film.lock ();
 944         DCPOMATIC_ASSERT (film);
 945         set_pixels_per_second ((_main_canvas->GetSize().GetWidth() - 32) / film->length().seconds());
 946         set_pixels_per_track ((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / _tracks);
 947         setup_scrollbars ();
 948         _main_canvas->Scroll (0, 0);
 949         _labels_canvas->Scroll (0, 0);
 950         Refresh ();
 951 }