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/scope_guard.h>
  42 #include <dcp/warnings.h>
  43 LIBDCP_DISABLE_WARNINGS
  44 #include <wx/graphics.h>
  45 LIBDCP_ENABLE_WARNINGS
  46 #include <iterator>
  47 #include <list>
  48
  49
  50 using std::abs;
  51 using std::dynamic_pointer_cast;
  52 using std::list;
  53 using std::make_shared;
  54 using std::max;
  55 using std::min;
  56 using std::shared_ptr;
  57 using std::weak_ptr;
  58 using boost::bind;
  59 using boost::optional;
  60 using namespace dcpomatic;
  61 #if BOOST_VERSION >= 106100
  62 using namespace boost::placeholders;
  63 #endif
  64
  65
  66 /* 3 hours in 640 pixels */
  67 double const Timeline::_minimum_pixels_per_second = 640.0 / (60 * 60 * 3);
  68 int const Timeline::_minimum_pixels_per_track = 16;
  69
  70
  71 Timeline::Timeline(wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film, FilmViewer& viewer)
  72         : wxPanel (parent, wxID_ANY)
  73         , _labels_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  74         , _main_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  75         , _content_panel (cp)
  76         , _film (film)
  77         , _viewer (viewer)
  78         , _time_axis_view (new TimelineTimeAxisView (*this, 64))
  79         , _reels_view (new TimelineReelsView (*this, 32))
  80         , _labels_view (new TimelineLabelsView (*this))
  81         , _tracks (0)
  82         , _left_down (false)
  83         , _down_view_position (0)
  84         , _first_move (false)
  85         , _menu (this, viewer)
  86         , _snap (true)
  87         , _tool (SELECT)
  88         , _x_scroll_rate (16)
  89         , _y_scroll_rate (16)
  90         , _pixels_per_track (48)
  91         , _first_resize (true)
  92         , _timer (this)
  93 {
  94 #ifndef __WXOSX__
  95         _labels_canvas->SetDoubleBuffered (true);
  96         _main_canvas->SetDoubleBuffered (true);
  97 #endif
  98
  99         auto sizer = new wxBoxSizer (wxHORIZONTAL);
 100         sizer->Add (_labels_canvas, 0, wxEXPAND);
 101         _labels_canvas->SetMinSize (wxSize (_labels_view->bbox().width, -1));
 102         sizer->Add (_main_canvas, 1, wxEXPAND);
 103         SetSizer (sizer);
 104
 105         _labels_canvas->Bind (wxEVT_PAINT,      boost::bind (&Timeline::paint_labels, this));
 106         _main_canvas->Bind   (wxEVT_PAINT,      boost::bind (&Timeline::paint_main,   this));
 107         _main_canvas->Bind   (wxEVT_LEFT_DOWN,  boost::bind (&Timeline::left_down,    this, _1));
 108         _main_canvas->Bind   (wxEVT_LEFT_UP,    boost::bind (&Timeline::left_up,      this, _1));
 109         _main_canvas->Bind   (wxEVT_RIGHT_DOWN, boost::bind (&Timeline::right_down,   this, _1));
 110         _main_canvas->Bind   (wxEVT_MOTION,     boost::bind (&Timeline::mouse_moved,  this, _1));
 111         _main_canvas->Bind   (wxEVT_SIZE,       boost::bind (&Timeline::resized,      this));
 112         _main_canvas->Bind   (wxEVT_SCROLLWIN_TOP,        boost::bind (&Timeline::scrolled,     this, _1));
 113         _main_canvas->Bind   (wxEVT_SCROLLWIN_BOTTOM,     boost::bind (&Timeline::scrolled,     this, _1));
 114         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 115         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 116         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 117         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 118         _main_canvas->Bind   (wxEVT_SCROLLWIN_THUMBTRACK, boost::bind (&Timeline::scrolled,     this, _1));
 119
 120         film_change(ChangeType::DONE, FilmProperty::CONTENT);
 121
 122         SetMinSize (wxSize (640, 4 * pixels_per_track() + 96));
 123
 124         _film_changed_connection = film->Change.connect (bind (&Timeline::film_change, this, _1, _2));
 125         _film_content_change_connection = film->ContentChange.connect (bind (&Timeline::film_content_change, this, _1, _3, _4));
 126
 127         Bind (wxEVT_TIMER, boost::bind(&Timeline::update_playhead, this));
 128         _timer.Start (200, wxTIMER_CONTINUOUS);
 129
 130         setup_scrollbars ();
 131         _labels_canvas->ShowScrollbars (wxSHOW_SB_NEVER, wxSHOW_SB_NEVER);
 132 }
 133
 134
 135 void
 136 Timeline::update_playhead ()
 137 {
 138         Refresh ();
 139 }
 140
 141
 142 void
 143 Timeline::set_pixels_per_second (double pps)
 144 {
 145         _pixels_per_second = max (_minimum_pixels_per_second, pps);
 146 }
 147
 148
 149 void
 150 Timeline::paint_labels ()
 151 {
 152         wxPaintDC dc (_labels_canvas);
 153
 154         auto film = _film.lock();
 155         if (film->content().empty()) {
 156                 return;
 157         }
 158
 159         auto gc = wxGraphicsContext::Create (dc);
 160         if (!gc) {
 161                 return;
 162         }
 163
 164         dcp::ScopeGuard sg = [gc]() { delete gc; };
 165
 166         int vsx, vsy;
 167         _labels_canvas->GetViewStart (&vsx, &vsy);
 168         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate + tracks_y_offset());
 169
 170         _labels_view->paint (gc, {});
 171 }
 172
 173
 174 void
 175 Timeline::paint_main ()
 176 {
 177         wxPaintDC dc (_main_canvas);
 178         dc.Clear();
 179
 180         auto film = _film.lock();
 181         if (film->content().empty()) {
 182                 return;
 183         }
 184
 185         _main_canvas->DoPrepareDC (dc);
 186
 187         auto gc = wxGraphicsContext::Create (dc);
 188         if (!gc) {
 189                 return;
 190         }
 191
 192         dcp::ScopeGuard sg = [gc]() { delete gc; };
 193
 194         gc->SetAntialiasMode (wxANTIALIAS_DEFAULT);
 195
 196         for (auto i: _views) {
 197
 198                 auto ic = dynamic_pointer_cast<TimelineContentView> (i);
 199
 200                 /* Find areas of overlap with other content views, so that we can plot them */
 201                 list<dcpomatic::Rect<int>> overlaps;
 202                 for (auto j: _views) {
 203                         auto jc = dynamic_pointer_cast<TimelineContentView> (j);
 204                         /* No overlap with non-content views, views on different tracks, audio views or non-active views */
 205                         if (!ic || !jc || i == j || ic->track() != jc->track() || ic->track().get_value_or(2) >= 2 || !ic->active() || !jc->active()) {
 206                                 continue;
 207                         }
 208
 209                         auto r = j->bbox().intersection(i->bbox());
 210                         if (r) {
 211                                 overlaps.push_back (r.get ());
 212                         }
 213                 }
 214
 215                 i->paint (gc, overlaps);
 216         }
 217
 218         if (_zoom_point) {
 219                 gc->SetPen(gui_is_dark() ? *wxWHITE_PEN : *wxBLACK_PEN);
 220                 gc->SetBrush (*wxTRANSPARENT_BRUSH);
 221                 gc->DrawRectangle (
 222                         min (_down_point.x, _zoom_point->x),
 223                         min (_down_point.y, _zoom_point->y),
 224                         abs (_down_point.x - _zoom_point->x),
 225                         abs (_down_point.y - _zoom_point->y)
 226                         );
 227         }
 228
 229         /* Playhead */
 230
 231         gc->SetPen (*wxRED_PEN);
 232         auto path = gc->CreatePath ();
 233         double const ph = _viewer.position().seconds() * pixels_per_second().get_value_or(0);
 234         path.MoveToPoint (ph, 0);
 235         path.AddLineToPoint (ph, pixels_per_track() * _tracks + 32);
 236         gc->StrokePath (path);
 237 }
 238
 239
 240 void
 241 Timeline::film_change(ChangeType type, FilmProperty p)
 242 {
 243         if (type != ChangeType::DONE) {
 244                 return;
 245         }
 246
 247         if (p == FilmProperty::CONTENT || p == FilmProperty::REEL_TYPE || p == FilmProperty::REEL_LENGTH) {
 248                 ensure_ui_thread ();
 249                 recreate_views ();
 250         } else if (p == FilmProperty::CONTENT_ORDER) {
 251                 Refresh ();
 252         }
 253 }
 254
 255
 256 void
 257 Timeline::recreate_views ()
 258 {
 259         auto film = _film.lock ();
 260         if (!film) {
 261                 return;
 262         }
 263
 264         _views.clear ();
 265         _views.push_back (_time_axis_view);
 266         _views.push_back (_reels_view);
 267
 268         for (auto i: film->content ()) {
 269                 if (i->video) {
 270                         _views.push_back (make_shared<TimelineVideoContentView>(*this, i));
 271                 }
 272
 273                 if (i->audio && !i->audio->mapping().mapped_output_channels().empty ()) {
 274                         _views.push_back (make_shared<TimelineAudioContentView>(*this, i));
 275                 }
 276
 277                 for (auto j: i->text) {
 278                         _views.push_back (make_shared<TimelineTextContentView>(*this, i, j));
 279                 }
 280
 281                 if (i->atmos) {
 282                         _views.push_back (make_shared<TimelineAtmosContentView>(*this, i));
 283                 }
 284         }
 285
 286         assign_tracks ();
 287         setup_scrollbars ();
 288         Refresh ();
 289 }
 290
 291
 292 void
 293 Timeline::film_content_change (ChangeType type, int property, bool frequent)
 294 {
 295         if (type != ChangeType::DONE) {
 296                 return;
 297         }
 298
 299         ensure_ui_thread ();
 300
 301         if (property == AudioContentProperty::STREAMS || property == VideoContentProperty::FRAME_TYPE) {
 302                 recreate_views ();
 303         } else if (property == ContentProperty::POSITION || property == ContentProperty::LENGTH) {
 304                 _reels_view->force_redraw ();
 305         } else if (!frequent) {
 306                 setup_scrollbars ();
 307                 Refresh ();
 308         }
 309 }
 310
 311
 312 template <class T>
 313 int
 314 place (shared_ptr<const Film> film, TimelineViewList& views, int& tracks)
 315 {
 316         int const base = tracks;
 317
 318         for (auto i: views) {
 319                 if (!dynamic_pointer_cast<T>(i)) {
 320                         continue;
 321                 }
 322
 323                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 324                 DCPOMATIC_ASSERT(cv);
 325
 326                 int t = base;
 327
 328                 auto content = cv->content();
 329                 DCPTimePeriod const content_period = content->period(film);
 330
 331                 while (true) {
 332                         auto j = views.begin();
 333                         while (j != views.end()) {
 334                                 auto test = dynamic_pointer_cast<T> (*j);
 335                                 if (!test) {
 336                                         ++j;
 337                                         continue;
 338                                 }
 339
 340                                 auto test_content = test->content();
 341                                 if (
 342                                         test->track() && test->track().get() == t &&
 343                                         content_period.overlap(test_content->period(film))
 344                                    ) {
 345                                         /* we have an overlap on track `t' */
 346                                         ++t;
 347                                         break;
 348                                 }
 349
 350                                 ++j;
 351                         }
 352
 353                         if (j == views.end ()) {
 354                                 /* no overlap on `t' */
 355                                 break;
 356                         }
 357                 }
 358
 359                 cv->set_track (t);
 360                 tracks = max (tracks, t + 1);
 361         }
 362
 363         return tracks - base;
 364 }
 365
 366
 367 /** Compare the mapped output channels of two TimelineViews, so we can into
 368  *  order of first mapped DCP channel.
 369  */
 370 struct AudioMappingComparator {
 371         bool operator()(shared_ptr<TimelineView> a, shared_ptr<TimelineView> b) {
 372                 int la = -1;
 373                 auto cva = dynamic_pointer_cast<TimelineAudioContentView>(a);
 374                 if (cva) {
 375                         auto oc = cva->content()->audio->mapping().mapped_output_channels();
 376                         la = *min_element(boost::begin(oc), boost::end(oc));
 377                 }
 378                 int lb = -1;
 379                 auto cvb = dynamic_pointer_cast<TimelineAudioContentView>(b);
 380                 if (cvb) {
 381                         auto oc = cvb->content()->audio->mapping().mapped_output_channels();
 382                         lb = *min_element(boost::begin(oc), boost::end(oc));
 383                 }
 384                 return la < lb;
 385         }
 386 };
 387
 388
 389 void
 390 Timeline::assign_tracks ()
 391 {
 392         /* Tracks are:
 393            Video 1
 394            Video 2
 395            Video N
 396            Text 1
 397            Text 2
 398            Text N
 399            Atmos
 400            Audio 1
 401            Audio 2
 402            Audio N
 403         */
 404
 405         auto film = _film.lock ();
 406         DCPOMATIC_ASSERT (film);
 407
 408         _tracks = 0;
 409
 410         for (auto i: _views) {
 411                 auto c = dynamic_pointer_cast<TimelineContentView>(i);
 412                 if (c) {
 413                         c->unset_track ();
 414                 }
 415         }
 416
 417         int const video_tracks = place<TimelineVideoContentView> (film, _views, _tracks);
 418         int const text_tracks = place<TimelineTextContentView> (film, _views, _tracks);
 419
 420         /* Atmos */
 421
 422         bool have_atmos = false;
 423         for (auto i: _views) {
 424                 auto cv = dynamic_pointer_cast<TimelineAtmosContentView>(i);
 425                 if (cv) {
 426                         cv->set_track (_tracks);
 427                         have_atmos = true;
 428                 }
 429         }
 430
 431         if (have_atmos) {
 432                 ++_tracks;
 433         }
 434
 435         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 436            DCP channel index.
 437         */
 438
 439         auto views = _views;
 440         sort(views.begin(), views.end(), AudioMappingComparator());
 441         int const audio_tracks = place<TimelineAudioContentView> (film, views, _tracks);
 442
 443         _labels_view->set_video_tracks (video_tracks);
 444         _labels_view->set_audio_tracks (audio_tracks);
 445         _labels_view->set_text_tracks (text_tracks);
 446         _labels_view->set_atmos (have_atmos);
 447
 448         _time_axis_view->set_y (tracks());
 449         _reels_view->set_y (8);
 450 }
 451
 452
 453 int
 454 Timeline::tracks () const
 455 {
 456         return _tracks;
 457 }
 458
 459
 460 void
 461 Timeline::setup_scrollbars ()
 462 {
 463         auto film = _film.lock ();
 464         if (!film || !_pixels_per_second) {
 465                 return;
 466         }
 467
 468         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 469
 470         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 471         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 472         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 473         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 474 }
 475
 476
 477 shared_ptr<TimelineView>
 478 Timeline::event_to_view (wxMouseEvent& ev)
 479 {
 480         /* Search backwards through views so that we find the uppermost one first */
 481         auto i = _views.rbegin();
 482
 483         int vsx, vsy;
 484         _main_canvas->GetViewStart (&vsx, &vsy);
 485         Position<int> const p (ev.GetX() + vsx * _x_scroll_rate, ev.GetY() + vsy * _y_scroll_rate);
 486
 487         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 488                 ++i;
 489         }
 490
 491         if (i == _views.rend ()) {
 492                 return {};
 493         }
 494
 495         return *i;
 496 }
 497
 498
 499 void
 500 Timeline::left_down (wxMouseEvent& ev)
 501 {
 502         _left_down = true;
 503         _down_point = ev.GetPosition ();
 504
 505         switch (_tool) {
 506         case SELECT:
 507                 left_down_select (ev);
 508                 break;
 509         case ZOOM:
 510         case ZOOM_ALL:
 511         case SNAP:
 512         case SEQUENCE:
 513                 /* Nothing to do */
 514                 break;
 515         }
 516 }
 517
 518
 519 void
 520 Timeline::left_down_select (wxMouseEvent& ev)
 521 {
 522         auto view = event_to_view (ev);
 523         auto content_view = dynamic_pointer_cast<TimelineContentView>(view);
 524
 525         _down_view.reset ();
 526
 527         if (content_view) {
 528                 _down_view = content_view;
 529                 _down_view_position = content_view->content()->position ();
 530         }
 531
 532         if (dynamic_pointer_cast<TimelineTimeAxisView>(view)) {
 533                 int vsx, vsy;
 534                 _main_canvas->GetViewStart(&vsx, &vsy);
 535                 _viewer.seek(DCPTime::from_seconds((ev.GetPosition().x + vsx * _x_scroll_rate) / _pixels_per_second.get_value_or(1)), true);
 536         }
 537
 538         for (auto i: _views) {
 539                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 540                 if (!cv) {
 541                         continue;
 542                 }
 543
 544                 if (!ev.ShiftDown ()) {
 545                         cv->set_selected (view == i);
 546                 }
 547         }
 548
 549         if (content_view && ev.ShiftDown ()) {
 550                 content_view->set_selected (!content_view->selected ());
 551         }
 552
 553         _first_move = false;
 554
 555         if (_down_view) {
 556                 /* Pre-compute the points that we might snap to */
 557                 for (auto i: _views) {
 558                         auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 559                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 560                                 continue;
 561                         }
 562
 563                         auto film = _film.lock ();
 564                         DCPOMATIC_ASSERT (film);
 565
 566                         _start_snaps.push_back (cv->content()->position());
 567                         _end_snaps.push_back (cv->content()->position());
 568                         _start_snaps.push_back (cv->content()->end(film));
 569                         _end_snaps.push_back (cv->content()->end(film));
 570
 571                         for (auto i: cv->content()->reel_split_points(film)) {
 572                                 _start_snaps.push_back (i);
 573                         }
 574                 }
 575
 576                 /* Tell everyone that things might change frequently during the drag */
 577                 _down_view->content()->set_change_signals_frequent (true);
 578         }
 579 }
 580
 581
 582 void
 583 Timeline::left_up (wxMouseEvent& ev)
 584 {
 585         _left_down = false;
 586
 587         switch (_tool) {
 588         case SELECT:
 589                 left_up_select (ev);
 590                 break;
 591         case ZOOM:
 592                 left_up_zoom (ev);
 593                 break;
 594         case ZOOM_ALL:
 595         case SNAP:
 596         case SEQUENCE:
 597                 break;
 598         }
 599 }
 600
 601
 602 void
 603 Timeline::left_up_select (wxMouseEvent& ev)
 604 {
 605         if (_down_view) {
 606                 _down_view->content()->set_change_signals_frequent (false);
 607         }
 608
 609         _content_panel->set_selection (selected_content ());
 610         /* Since we may have just set change signals back to `not-frequent', we have to
 611            make sure this position change is signalled, even if the position value has
 612            not changed since the last time it was set (with frequent=true).  This is
 613            a bit of a hack.
 614         */
 615         set_position_from_event (ev, true);
 616
 617         /* Clear up up the stuff we don't do during drag */
 618         assign_tracks ();
 619         setup_scrollbars ();
 620         Refresh ();
 621
 622         _start_snaps.clear ();
 623         _end_snaps.clear ();
 624 }
 625
 626
 627 void
 628 Timeline::left_up_zoom (wxMouseEvent& ev)
 629 {
 630         _zoom_point = ev.GetPosition ();
 631
 632         int vsx, vsy;
 633         _main_canvas->GetViewStart (&vsx, &vsy);
 634
 635         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 636         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 637
 638         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 639                 /* Very small zoom rectangle: we assume it wasn't intentional */
 640                 _zoom_point = optional<wxPoint> ();
 641                 Refresh ();
 642                 return;
 643         }
 644
 645         auto const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 646         auto const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 647         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 648
 649         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 650         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 651         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 652
 653         setup_scrollbars ();
 654         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 655         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 656         _labels_canvas->Scroll (0, y);
 657
 658         _zoom_point = optional<wxPoint> ();
 659         Refresh ();
 660 }
 661
 662
 663 void
 664 Timeline::set_pixels_per_track (int h)
 665 {
 666         _pixels_per_track = max(_minimum_pixels_per_track, h);
 667 }
 668
 669
 670 void
 671 Timeline::mouse_moved (wxMouseEvent& ev)
 672 {
 673         switch (_tool) {
 674         case SELECT:
 675                 mouse_moved_select (ev);
 676                 break;
 677         case ZOOM:
 678                 mouse_moved_zoom (ev);
 679                 break;
 680         case ZOOM_ALL:
 681         case SNAP:
 682         case SEQUENCE:
 683                 break;
 684         }
 685 }
 686
 687
 688 void
 689 Timeline::mouse_moved_select (wxMouseEvent& ev)
 690 {
 691         if (!_left_down) {
 692                 return;
 693         }
 694
 695         set_position_from_event (ev);
 696 }
 697
 698
 699 void
 700 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 701 {
 702         if (!_left_down) {
 703                 return;
 704         }
 705
 706         _zoom_point = ev.GetPosition ();
 707         setup_scrollbars();
 708         Refresh ();
 709 }
 710
 711
 712 void
 713 Timeline::right_down (wxMouseEvent& ev)
 714 {
 715         switch (_tool) {
 716         case SELECT:
 717                 right_down_select (ev);
 718                 break;
 719         case ZOOM:
 720                 /* Zoom out */
 721                 set_pixels_per_second (*_pixels_per_second / 2);
 722                 set_pixels_per_track (_pixels_per_track / 2);
 723                 setup_scrollbars ();
 724                 Refresh ();
 725                 break;
 726         case ZOOM_ALL:
 727         case SNAP:
 728         case SEQUENCE:
 729                 break;
 730         }
 731 }
 732
 733
 734 void
 735 Timeline::right_down_select (wxMouseEvent& ev)
 736 {
 737         auto view = event_to_view (ev);
 738         auto cv = dynamic_pointer_cast<TimelineContentView> (view);
 739         if (!cv) {
 740                 return;
 741         }
 742
 743         if (!cv->selected ()) {
 744                 clear_selection ();
 745                 cv->set_selected (true);
 746         }
 747
 748         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 749 }
 750
 751
 752 void
 753 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 754 {
 755         auto const d = a - b;
 756         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 757                 nearest_distance = d;
 758         }
 759 }
 760
 761
 762 void
 763 Timeline::set_position_from_event (wxMouseEvent& ev, bool force_emit)
 764 {
 765         if (!_pixels_per_second) {
 766                 return;
 767         }
 768
 769         double const pps = _pixels_per_second.get ();
 770
 771         auto const p = ev.GetPosition();
 772
 773         if (!_first_move) {
 774                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 775                    before the drag is considered to have started.
 776                 */
 777                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 778                 if (dist < 8) {
 779                         return;
 780                 }
 781                 _first_move = true;
 782         }
 783
 784         if (!_down_view) {
 785                 return;
 786         }
 787
 788         auto new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 789
 790         auto film = _film.lock ();
 791         DCPOMATIC_ASSERT (film);
 792
 793         if (_snap) {
 794                 auto const new_end = new_position + _down_view->content()->length_after_trim(film);
 795                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 796                    positive is right).
 797                 */
 798                 optional<DCPTime> nearest_distance;
 799
 800                 /* Find the nearest snap point */
 801
 802                 for (auto i: _start_snaps) {
 803                         maybe_snap (i, new_position, nearest_distance);
 804                 }
 805
 806                 for (auto i: _end_snaps) {
 807                         maybe_snap (i, new_end, nearest_distance);
 808                 }
 809
 810                 if (nearest_distance) {
 811                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 812                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 813                                 new_position += nearest_distance.get ();
 814                         }
 815                 }
 816         }
 817
 818         if (new_position < DCPTime ()) {
 819                 new_position = DCPTime ();
 820         }
 821
 822         _down_view->content()->set_position (film, new_position, force_emit);
 823
 824         film->set_sequence (false);
 825 }
 826
 827
 828 void
 829 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 830 {
 831         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 832 }
 833
 834
 835 shared_ptr<const Film>
 836 Timeline::film () const
 837 {
 838         return _film.lock ();
 839 }
 840
 841
 842 void
 843 Timeline::resized ()
 844 {
 845         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 846                 zoom_all ();
 847                 _first_resize = false;
 848         }
 849         setup_scrollbars ();
 850 }
 851
 852
 853 void
 854 Timeline::clear_selection ()
 855 {
 856         for (auto i: _views) {
 857                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView>(i);
 858                 if (cv) {
 859                         cv->set_selected (false);
 860                 }
 861         }
 862 }
 863
 864
 865 TimelineContentViewList
 866 Timeline::selected_views () const
 867 {
 868         TimelineContentViewList sel;
 869
 870         for (auto i: _views) {
 871                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 872                 if (cv && cv->selected()) {
 873                         sel.push_back (cv);
 874                 }
 875         }
 876
 877         return sel;
 878 }
 879
 880
 881 ContentList
 882 Timeline::selected_content () const
 883 {
 884         ContentList sel;
 885
 886         for (auto i: selected_views()) {
 887                 sel.push_back(i->content());
 888         }
 889
 890         return sel;
 891 }
 892
 893
 894 void
 895 Timeline::set_selection (ContentList selection)
 896 {
 897         for (auto i: _views) {
 898                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 899                 if (cv) {
 900                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 901                 }
 902         }
 903 }
 904
 905
 906 int
 907 Timeline::tracks_y_offset () const
 908 {
 909         return _reels_view->bbox().height + 4;
 910 }
 911
 912
 913 int
 914 Timeline::width () const
 915 {
 916         return _main_canvas->GetVirtualSize().GetWidth();
 917 }
 918
 919
 920 void
 921 Timeline::scrolled (wxScrollWinEvent& ev)
 922 {
 923         if (ev.GetOrientation() == wxVERTICAL) {
 924                 int x, y;
 925                 _main_canvas->GetViewStart (&x, &y);
 926                 _labels_canvas->Scroll (0, y);
 927         }
 928         ev.Skip ();
 929 }
 930
 931
 932 void
 933 Timeline::tool_clicked (Tool t)
 934 {
 935         switch (t) {
 936         case ZOOM:
 937         case SELECT:
 938                 _tool = t;
 939                 break;
 940         case ZOOM_ALL:
 941                 zoom_all ();
 942                 break;
 943         case SNAP:
 944         case SEQUENCE:
 945                 break;
 946         }
 947 }
 948
 949
 950 void
 951 Timeline::zoom_all ()
 952 {
 953         auto film = _film.lock ();
 954         DCPOMATIC_ASSERT (film);
 955         set_pixels_per_second((_main_canvas->GetSize().GetWidth() - 32) / std::max(1.0, film->length().seconds()));
 956         set_pixels_per_track((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / std::max(1, _tracks));
 957         setup_scrollbars ();
 958         _main_canvas->Scroll (0, 0);
 959         _labels_canvas->Scroll (0, 0);
 960         Refresh ();
 961 }
 962
 963
 964 void
 965 Timeline::keypress(wxKeyEvent const& event)
 966 {
 967         if (event.GetKeyCode() == WXK_DELETE) {
 968                 auto film = _film.lock();
 969                 DCPOMATIC_ASSERT(film);
 970                 film->remove_content(selected_content());
 971         } else {
 972                 switch (event.GetRawKeyCode()) {
 973                 case '+':
 974                         set_pixels_per_second(_pixels_per_second.get_value_or(1) * 2);
 975                         setup_scrollbars();
 976                         break;
 977                 case '-':
 978                         set_pixels_per_second(_pixels_per_second.get_value_or(1) / 2);
 979                         setup_scrollbars();
 980                         break;
 981                 }
 982         }
 983 }
 984