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, 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         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         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
 325                 int t = base;
 326
 327                 auto content = cv->content();
 328                 DCPTimePeriod const content_period = content->period(film);
 329
 330                 while (true) {
 331                         auto j = views.begin();
 332                         while (j != views.end()) {
 333                                 auto test = dynamic_pointer_cast<T> (*j);
 334                                 if (!test) {
 335                                         ++j;
 336                                         continue;
 337                                 }
 338
 339                                 auto test_content = test->content();
 340                                 if (
 341                                         test->track() && test->track().get() == t &&
 342                                         content_period.overlap(test_content->period(film))
 343                                    ) {
 344                                         /* we have an overlap on track `t' */
 345                                         ++t;
 346                                         break;
 347                                 }
 348
 349                                 ++j;
 350                         }
 351
 352                         if (j == views.end ()) {
 353                                 /* no overlap on `t' */
 354                                 break;
 355                         }
 356                 }
 357
 358                 cv->set_track (t);
 359                 tracks = max (tracks, t + 1);
 360         }
 361
 362         return tracks - base;
 363 }
 364
 365
 366 /** Compare the mapped output channels of two TimelineViews, so we can into
 367  *  order of first mapped DCP channel.
 368  */
 369 struct AudioMappingComparator {
 370         bool operator()(shared_ptr<TimelineView> a, shared_ptr<TimelineView> b) {
 371                 int la = -1;
 372                 auto cva = dynamic_pointer_cast<TimelineAudioContentView>(a);
 373                 if (cva) {
 374                         auto oc = cva->content()->audio->mapping().mapped_output_channels();
 375                         la = *min_element(boost::begin(oc), boost::end(oc));
 376                 }
 377                 int lb = -1;
 378                 auto cvb = dynamic_pointer_cast<TimelineAudioContentView>(b);
 379                 if (cvb) {
 380                         auto oc = cvb->content()->audio->mapping().mapped_output_channels();
 381                         lb = *min_element(boost::begin(oc), boost::end(oc));
 382                 }
 383                 return la < lb;
 384         }
 385 };
 386
 387
 388 void
 389 Timeline::assign_tracks ()
 390 {
 391         /* Tracks are:
 392            Video 1
 393            Video 2
 394            Video N
 395            Text 1
 396            Text 2
 397            Text N
 398            Atmos
 399            Audio 1
 400            Audio 2
 401            Audio N
 402         */
 403
 404         auto film = _film.lock ();
 405         DCPOMATIC_ASSERT (film);
 406
 407         _tracks = 0;
 408
 409         for (auto i: _views) {
 410                 auto c = dynamic_pointer_cast<TimelineContentView>(i);
 411                 if (c) {
 412                         c->unset_track ();
 413                 }
 414         }
 415
 416         int const video_tracks = place<TimelineVideoContentView> (film, _views, _tracks);
 417         int const text_tracks = place<TimelineTextContentView> (film, _views, _tracks);
 418
 419         /* Atmos */
 420
 421         bool have_atmos = false;
 422         for (auto i: _views) {
 423                 auto cv = dynamic_pointer_cast<TimelineAtmosContentView>(i);
 424                 if (cv) {
 425                         cv->set_track (_tracks);
 426                         have_atmos = true;
 427                 }
 428         }
 429
 430         if (have_atmos) {
 431                 ++_tracks;
 432         }
 433
 434         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 435            DCP channel index.
 436         */
 437
 438         auto views = _views;
 439         sort(views.begin(), views.end(), AudioMappingComparator());
 440         int const audio_tracks = place<TimelineAudioContentView> (film, views, _tracks);
 441
 442         _labels_view->set_video_tracks (video_tracks);
 443         _labels_view->set_audio_tracks (audio_tracks);
 444         _labels_view->set_text_tracks (text_tracks);
 445         _labels_view->set_atmos (have_atmos);
 446
 447         _time_axis_view->set_y (tracks());
 448         _reels_view->set_y (8);
 449 }
 450
 451
 452 int
 453 Timeline::tracks () const
 454 {
 455         return _tracks;
 456 }
 457
 458
 459 void
 460 Timeline::setup_scrollbars ()
 461 {
 462         auto film = _film.lock ();
 463         if (!film || !_pixels_per_second) {
 464                 return;
 465         }
 466
 467         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 468
 469         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 470         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 471         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 472         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 473 }
 474
 475
 476 shared_ptr<TimelineView>
 477 Timeline::event_to_view (wxMouseEvent& ev)
 478 {
 479         /* Search backwards through views so that we find the uppermost one first */
 480         auto i = _views.rbegin();
 481
 482         int vsx, vsy;
 483         _main_canvas->GetViewStart (&vsx, &vsy);
 484         Position<int> const p (ev.GetX() + vsx * _x_scroll_rate, ev.GetY() + vsy * _y_scroll_rate);
 485
 486         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 487                 ++i;
 488         }
 489
 490         if (i == _views.rend ()) {
 491                 return {};
 492         }
 493
 494         return *i;
 495 }
 496
 497
 498 void
 499 Timeline::left_down (wxMouseEvent& ev)
 500 {
 501         _left_down = true;
 502         _down_point = ev.GetPosition ();
 503
 504         switch (_tool) {
 505         case SELECT:
 506                 left_down_select (ev);
 507                 break;
 508         case ZOOM:
 509         case ZOOM_ALL:
 510         case SNAP:
 511         case SEQUENCE:
 512                 /* Nothing to do */
 513                 break;
 514         }
 515 }
 516
 517
 518 void
 519 Timeline::left_down_select (wxMouseEvent& ev)
 520 {
 521         auto view = event_to_view (ev);
 522         auto content_view = dynamic_pointer_cast<TimelineContentView>(view);
 523
 524         _down_view.reset ();
 525
 526         if (content_view) {
 527                 _down_view = content_view;
 528                 _down_view_position = content_view->content()->position ();
 529         }
 530
 531         if (dynamic_pointer_cast<TimelineTimeAxisView>(view)) {
 532                 int vsx, vsy;
 533                 _main_canvas->GetViewStart(&vsx, &vsy);
 534                 _viewer.seek(DCPTime::from_seconds((ev.GetPosition().x + vsx * _x_scroll_rate) / _pixels_per_second.get_value_or(1)), true);
 535         }
 536
 537         for (auto i: _views) {
 538                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 539                 if (!cv) {
 540                         continue;
 541                 }
 542
 543                 if (!ev.ShiftDown ()) {
 544                         cv->set_selected (view == i);
 545                 }
 546         }
 547
 548         if (content_view && ev.ShiftDown ()) {
 549                 content_view->set_selected (!content_view->selected ());
 550         }
 551
 552         _first_move = false;
 553
 554         if (_down_view) {
 555                 /* Pre-compute the points that we might snap to */
 556                 for (auto i: _views) {
 557                         auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 558                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 559                                 continue;
 560                         }
 561
 562                         auto film = _film.lock ();
 563                         DCPOMATIC_ASSERT (film);
 564
 565                         _start_snaps.push_back (cv->content()->position());
 566                         _end_snaps.push_back (cv->content()->position());
 567                         _start_snaps.push_back (cv->content()->end(film));
 568                         _end_snaps.push_back (cv->content()->end(film));
 569
 570                         for (auto i: cv->content()->reel_split_points(film)) {
 571                                 _start_snaps.push_back (i);
 572                         }
 573                 }
 574
 575                 /* Tell everyone that things might change frequently during the drag */
 576                 _down_view->content()->set_change_signals_frequent (true);
 577         }
 578 }
 579
 580
 581 void
 582 Timeline::left_up (wxMouseEvent& ev)
 583 {
 584         _left_down = false;
 585
 586         switch (_tool) {
 587         case SELECT:
 588                 left_up_select (ev);
 589                 break;
 590         case ZOOM:
 591                 left_up_zoom (ev);
 592                 break;
 593         case ZOOM_ALL:
 594         case SNAP:
 595         case SEQUENCE:
 596                 break;
 597         }
 598 }
 599
 600
 601 void
 602 Timeline::left_up_select (wxMouseEvent& ev)
 603 {
 604         if (_down_view) {
 605                 _down_view->content()->set_change_signals_frequent (false);
 606         }
 607
 608         _content_panel->set_selection (selected_content ());
 609         /* Since we may have just set change signals back to `not-frequent', we have to
 610            make sure this position change is signalled, even if the position value has
 611            not changed since the last time it was set (with frequent=true).  This is
 612            a bit of a hack.
 613         */
 614         set_position_from_event (ev, true);
 615
 616         /* Clear up up the stuff we don't do during drag */
 617         assign_tracks ();
 618         setup_scrollbars ();
 619         Refresh ();
 620
 621         _start_snaps.clear ();
 622         _end_snaps.clear ();
 623 }
 624
 625
 626 void
 627 Timeline::left_up_zoom (wxMouseEvent& ev)
 628 {
 629         _zoom_point = ev.GetPosition ();
 630
 631         int vsx, vsy;
 632         _main_canvas->GetViewStart (&vsx, &vsy);
 633
 634         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 635         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 636
 637         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 638                 /* Very small zoom rectangle: we assume it wasn't intentional */
 639                 _zoom_point = optional<wxPoint> ();
 640                 Refresh ();
 641                 return;
 642         }
 643
 644         auto const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 645         auto const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 646         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 647
 648         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 649         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 650         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 651
 652         setup_scrollbars ();
 653         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 654         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 655         _labels_canvas->Scroll (0, y);
 656
 657         _zoom_point = optional<wxPoint> ();
 658         Refresh ();
 659 }
 660
 661
 662 void
 663 Timeline::set_pixels_per_track (int h)
 664 {
 665         _pixels_per_track = max(_minimum_pixels_per_track, h);
 666 }
 667
 668
 669 void
 670 Timeline::mouse_moved (wxMouseEvent& ev)
 671 {
 672         switch (_tool) {
 673         case SELECT:
 674                 mouse_moved_select (ev);
 675                 break;
 676         case ZOOM:
 677                 mouse_moved_zoom (ev);
 678                 break;
 679         case ZOOM_ALL:
 680         case SNAP:
 681         case SEQUENCE:
 682                 break;
 683         }
 684 }
 685
 686
 687 void
 688 Timeline::mouse_moved_select (wxMouseEvent& ev)
 689 {
 690         if (!_left_down) {
 691                 return;
 692         }
 693
 694         set_position_from_event (ev);
 695 }
 696
 697
 698 void
 699 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 700 {
 701         if (!_left_down) {
 702                 return;
 703         }
 704
 705         _zoom_point = ev.GetPosition ();
 706         setup_scrollbars();
 707         Refresh ();
 708 }
 709
 710
 711 void
 712 Timeline::right_down (wxMouseEvent& ev)
 713 {
 714         switch (_tool) {
 715         case SELECT:
 716                 right_down_select (ev);
 717                 break;
 718         case ZOOM:
 719                 /* Zoom out */
 720                 set_pixels_per_second (*_pixels_per_second / 2);
 721                 set_pixels_per_track (_pixels_per_track / 2);
 722                 setup_scrollbars ();
 723                 Refresh ();
 724                 break;
 725         case ZOOM_ALL:
 726         case SNAP:
 727         case SEQUENCE:
 728                 break;
 729         }
 730 }
 731
 732
 733 void
 734 Timeline::right_down_select (wxMouseEvent& ev)
 735 {
 736         auto view = event_to_view (ev);
 737         auto cv = dynamic_pointer_cast<TimelineContentView> (view);
 738         if (!cv) {
 739                 return;
 740         }
 741
 742         if (!cv->selected ()) {
 743                 clear_selection ();
 744                 cv->set_selected (true);
 745         }
 746
 747         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 748 }
 749
 750
 751 void
 752 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 753 {
 754         auto const d = a - b;
 755         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 756                 nearest_distance = d;
 757         }
 758 }
 759
 760
 761 void
 762 Timeline::set_position_from_event (wxMouseEvent& ev, bool force_emit)
 763 {
 764         if (!_pixels_per_second) {
 765                 return;
 766         }
 767
 768         double const pps = _pixels_per_second.get ();
 769
 770         auto const p = ev.GetPosition();
 771
 772         if (!_first_move) {
 773                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 774                    before the drag is considered to have started.
 775                 */
 776                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 777                 if (dist < 8) {
 778                         return;
 779                 }
 780                 _first_move = true;
 781         }
 782
 783         if (!_down_view) {
 784                 return;
 785         }
 786
 787         auto new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 788
 789         auto film = _film.lock ();
 790         DCPOMATIC_ASSERT (film);
 791
 792         if (_snap) {
 793                 auto const new_end = new_position + _down_view->content()->length_after_trim(film);
 794                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 795                    positive is right).
 796                 */
 797                 optional<DCPTime> nearest_distance;
 798
 799                 /* Find the nearest snap point */
 800
 801                 for (auto i: _start_snaps) {
 802                         maybe_snap (i, new_position, nearest_distance);
 803                 }
 804
 805                 for (auto i: _end_snaps) {
 806                         maybe_snap (i, new_end, nearest_distance);
 807                 }
 808
 809                 if (nearest_distance) {
 810                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 811                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 812                                 new_position += nearest_distance.get ();
 813                         }
 814                 }
 815         }
 816
 817         if (new_position < DCPTime ()) {
 818                 new_position = DCPTime ();
 819         }
 820
 821         _down_view->content()->set_position (film, new_position, force_emit);
 822
 823         film->set_sequence (false);
 824 }
 825
 826
 827 void
 828 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 829 {
 830         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 831 }
 832
 833
 834 shared_ptr<const Film>
 835 Timeline::film () const
 836 {
 837         return _film.lock ();
 838 }
 839
 840
 841 void
 842 Timeline::resized ()
 843 {
 844         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 845                 zoom_all ();
 846                 _first_resize = false;
 847         }
 848         setup_scrollbars ();
 849 }
 850
 851
 852 void
 853 Timeline::clear_selection ()
 854 {
 855         for (auto i: _views) {
 856                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView>(i);
 857                 if (cv) {
 858                         cv->set_selected (false);
 859                 }
 860         }
 861 }
 862
 863
 864 TimelineContentViewList
 865 Timeline::selected_views () const
 866 {
 867         TimelineContentViewList sel;
 868
 869         for (auto i: _views) {
 870                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 871                 if (cv && cv->selected()) {
 872                         sel.push_back (cv);
 873                 }
 874         }
 875
 876         return sel;
 877 }
 878
 879
 880 ContentList
 881 Timeline::selected_content () const
 882 {
 883         ContentList sel;
 884
 885         for (auto i: selected_views()) {
 886                 sel.push_back(i->content());
 887         }
 888
 889         return sel;
 890 }
 891
 892
 893 void
 894 Timeline::set_selection (ContentList selection)
 895 {
 896         for (auto i: _views) {
 897                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 898                 if (cv) {
 899                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 900                 }
 901         }
 902 }
 903
 904
 905 int
 906 Timeline::tracks_y_offset () const
 907 {
 908         return _reels_view->bbox().height + 4;
 909 }
 910
 911
 912 int
 913 Timeline::width () const
 914 {
 915         return _main_canvas->GetVirtualSize().GetWidth();
 916 }
 917
 918
 919 void
 920 Timeline::scrolled (wxScrollWinEvent& ev)
 921 {
 922         if (ev.GetOrientation() == wxVERTICAL) {
 923                 int x, y;
 924                 _main_canvas->GetViewStart (&x, &y);
 925                 _labels_canvas->Scroll (0, y);
 926         }
 927         ev.Skip ();
 928 }
 929
 930
 931 void
 932 Timeline::tool_clicked (Tool t)
 933 {
 934         switch (t) {
 935         case ZOOM:
 936         case SELECT:
 937                 _tool = t;
 938                 break;
 939         case ZOOM_ALL:
 940                 zoom_all ();
 941                 break;
 942         case SNAP:
 943         case SEQUENCE:
 944                 break;
 945         }
 946 }
 947
 948
 949 void
 950 Timeline::zoom_all ()
 951 {
 952         auto film = _film.lock ();
 953         DCPOMATIC_ASSERT (film);
 954         set_pixels_per_second((_main_canvas->GetSize().GetWidth() - 32) / std::max(1.0, film->length().seconds()));
 955         set_pixels_per_track((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / std::max(1, _tracks));
 956         setup_scrollbars ();
 957         _main_canvas->Scroll (0, 0);
 958         _labels_canvas->Scroll (0, 0);
 959         Refresh ();
 960 }
 961
 962
 963 void
 964 Timeline::keypress(wxKeyEvent const& event)
 965 {
 966         if (event.GetKeyCode() == WXK_DELETE) {
 967                 auto film = _film.lock();
 968                 DCPOMATIC_ASSERT(film);
 969                 film->remove_content(selected_content());
 970         } else {
 971                 switch (event.GetRawKeyCode()) {
 972                 case '+':
 973                         set_pixels_per_second(_pixels_per_second.get_value_or(1) * 2);
 974                         setup_scrollbars();
 975                         break;
 976                 case '-':
 977                         set_pixels_per_second(_pixels_per_second.get_value_or(1) / 2);
 978                         setup_scrollbars();
 979                         break;
 980                 }
 981         }
 982 }
 983