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