src/wx/timeline.cc

   1 /*
   2     Copyright (C) 2013-2018 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #include "film_editor.h"
  22 #include "timeline.h"
  23 #include "timeline_time_axis_view.h"
  24 #include "timeline_reels_view.h"
  25 #include "timeline_labels_view.h"
  26 #include "timeline_video_content_view.h"
  27 #include "timeline_audio_content_view.h"
  28 #include "timeline_text_content_view.h"
  29 #include "timeline_atmos_content_view.h"
  30 #include "content_panel.h"
  31 #include "wx_util.h"
  32 #include "lib/film.h"
  33 #include "lib/playlist.h"
  34 #include "lib/image_content.h"
  35 #include "lib/timer.h"
  36 #include "lib/audio_content.h"
  37 #include "lib/text_content.h"
  38 #include "lib/video_content.h"
  39 #include "lib/atmos_mxf_content.h"
  40 #include <wx/graphics.h>
  41 #include <boost/weak_ptr.hpp>
  42 #include <boost/foreach.hpp>
  43 #include <list>
  44 #include <iterator>
  45 #include <iostream>
  46
  47 using std::list;
  48 using std::cout;
  49 using std::min;
  50 using std::max;
  51 using boost::shared_ptr;
  52 using boost::weak_ptr;
  53 using boost::dynamic_pointer_cast;
  54 using boost::bind;
  55 using boost::optional;
  56
  57 /* 3 hours in 640 pixels */
  58 double const Timeline::_minimum_pixels_per_second = 640.0 / (60 * 60 * 3);
  59 int const Timeline::_minimum_pixels_per_track = 16;
  60
  61 Timeline::Timeline (wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film)
  62         : wxPanel (parent, wxID_ANY)
  63         , _labels_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  64         , _main_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  65         , _content_panel (cp)
  66         , _film (film)
  67         , _time_axis_view (new TimelineTimeAxisView (*this, 64))
  68         , _reels_view (new TimelineReelsView (*this, 32))
  69         , _labels_view (new TimelineLabelsView (*this))
  70         , _tracks (0)
  71         , _left_down (false)
  72         , _down_view_position (0)
  73         , _first_move (false)
  74         , _menu (this)
  75         , _snap (true)
  76         , _tool (SELECT)
  77         , _x_scroll_rate (16)
  78         , _y_scroll_rate (16)
  79         , _pixels_per_track (48)
  80         , _first_resize (true)
  81 {
  82 #ifndef __WXOSX__
  83         _labels_canvas->SetDoubleBuffered (true);
  84         _main_canvas->SetDoubleBuffered (true);
  85 #endif
  86
  87         wxSizer* sizer = new wxBoxSizer (wxHORIZONTAL);
  88         sizer->Add (_labels_canvas, 0, wxEXPAND);
  89         _labels_canvas->SetMinSize (wxSize (_labels_view->bbox().width, -1));
  90         sizer->Add (_main_canvas, 1, wxEXPAND);
  91         SetSizer (sizer);
  92
  93         _labels_canvas->Bind (wxEVT_PAINT,      boost::bind (&Timeline::paint_labels, this));
  94         _main_canvas->Bind   (wxEVT_PAINT,      boost::bind (&Timeline::paint_main,   this));
  95         _main_canvas->Bind   (wxEVT_LEFT_DOWN,  boost::bind (&Timeline::left_down,    this, _1));
  96         _main_canvas->Bind   (wxEVT_LEFT_UP,    boost::bind (&Timeline::left_up,      this, _1));
  97         _main_canvas->Bind   (wxEVT_RIGHT_DOWN, boost::bind (&Timeline::right_down,   this, _1));
  98         _main_canvas->Bind   (wxEVT_MOTION,     boost::bind (&Timeline::mouse_moved,  this, _1));
  99         _main_canvas->Bind   (wxEVT_SIZE,       boost::bind (&Timeline::resized,      this));
 100         _main_canvas->Bind   (wxEVT_SCROLLWIN_TOP,        boost::bind (&Timeline::scrolled,     this, _1));
 101         _main_canvas->Bind   (wxEVT_SCROLLWIN_BOTTOM,     boost::bind (&Timeline::scrolled,     this, _1));
 102         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 103         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 104         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 105         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 106         _main_canvas->Bind   (wxEVT_SCROLLWIN_THUMBTRACK, boost::bind (&Timeline::scrolled,     this, _1));
 107
 108         film_changed (Film::CONTENT);
 109
 110         SetMinSize (wxSize (640, 4 * pixels_per_track() + 96));
 111
 112         _film_changed_connection = film->Changed.connect (bind (&Timeline::film_changed, this, _1));
 113         _film_content_changed_connection = film->ContentChanged.connect (bind (&Timeline::film_content_changed, this, _2, _3));
 114
 115         setup_scrollbars ();
 116         _labels_canvas->ShowScrollbars (wxSHOW_SB_NEVER, wxSHOW_SB_NEVER);
 117 }
 118
 119 void
 120 Timeline::set_pixels_per_second (double pps)
 121 {
 122         _pixels_per_second = max (_minimum_pixels_per_second, pps);
 123 }
 124
 125 void
 126 Timeline::paint_labels ()
 127 {
 128         wxPaintDC dc (_labels_canvas);
 129
 130         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 131         if (!gc) {
 132                 return;
 133         }
 134
 135         int vsx, vsy;
 136         _labels_canvas->GetViewStart (&vsx, &vsy);
 137         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate + tracks_y_offset());
 138
 139         _labels_view->paint (gc, list<dcpomatic::Rect<int> >());
 140
 141         delete gc;
 142 }
 143
 144 void
 145 Timeline::paint_main ()
 146 {
 147         wxPaintDC dc (_main_canvas);
 148         _main_canvas->DoPrepareDC (dc);
 149
 150         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 151         if (!gc) {
 152                 return;
 153         }
 154
 155         int vsx, vsy;
 156         _main_canvas->GetViewStart (&vsx, &vsy);
 157         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate);
 158
 159         gc->SetAntialiasMode (wxANTIALIAS_DEFAULT);
 160
 161         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 162
 163                 shared_ptr<TimelineContentView> ic = dynamic_pointer_cast<TimelineContentView> (i);
 164
 165                 /* Find areas of overlap with other content views, so that we can plot them */
 166                 list<dcpomatic::Rect<int> > overlaps;
 167                 BOOST_FOREACH (shared_ptr<TimelineView> j, _views) {
 168                         shared_ptr<TimelineContentView> jc = dynamic_pointer_cast<TimelineContentView> (j);
 169                         /* No overlap with non-content views, views no different tracks, audio views or non-active views */
 170                         if (!ic || !jc || i == j || ic->track() != jc->track() || ic->track().get_value_or(2) >= 2 || !ic->active() || !jc->active()) {
 171                                 continue;
 172                         }
 173
 174                         optional<dcpomatic::Rect<int> > r = j->bbox().intersection (i->bbox());
 175                         if (r) {
 176                                 overlaps.push_back (r.get ());
 177                         }
 178                 }
 179
 180                 i->paint (gc, overlaps);
 181         }
 182
 183         if (_zoom_point) {
 184                 /* Translate back as _down_point and _zoom_point do not take scroll into account */
 185                 gc->Translate (vsx * _x_scroll_rate, vsy * _y_scroll_rate);
 186                 gc->SetPen (*wxBLACK_PEN);
 187                 gc->SetBrush (*wxTRANSPARENT_BRUSH);
 188                 gc->DrawRectangle (
 189                         min (_down_point.x, _zoom_point->x),
 190                         min (_down_point.y, _zoom_point->y),
 191                         fabs (_down_point.x - _zoom_point->x),
 192                         fabs (_down_point.y - _zoom_point->y)
 193                         );
 194         }
 195
 196         delete gc;
 197 }
 198
 199 void
 200 Timeline::film_changed (Film::Property p)
 201 {
 202         if (p == Film::CONTENT || p == Film::REEL_TYPE || p == Film::REEL_LENGTH) {
 203                 ensure_ui_thread ();
 204                 recreate_views ();
 205         } else if (p == Film::CONTENT_ORDER) {
 206                 Refresh ();
 207         }
 208 }
 209
 210 void
 211 Timeline::recreate_views ()
 212 {
 213         shared_ptr<const Film> film = _film.lock ();
 214         if (!film) {
 215                 return;
 216         }
 217
 218         _views.clear ();
 219         _views.push_back (_time_axis_view);
 220         _views.push_back (_reels_view);
 221
 222         BOOST_FOREACH (shared_ptr<Content> i, film->content ()) {
 223                 if (i->video) {
 224                         _views.push_back (shared_ptr<TimelineView> (new TimelineVideoContentView (*this, i)));
 225                 }
 226
 227                 if (i->audio && !i->audio->mapping().mapped_output_channels().empty ()) {
 228                         _views.push_back (shared_ptr<TimelineView> (new TimelineAudioContentView (*this, i)));
 229                 }
 230
 231                 if (i->subtitle) {
 232                         _views.push_back (shared_ptr<TimelineView> (new TimelineTextContentView (*this, i)));
 233                 }
 234
 235                 if (dynamic_pointer_cast<AtmosMXFContent> (i)) {
 236                         _views.push_back (shared_ptr<TimelineView> (new TimelineAtmosContentView (*this, i)));
 237                 }
 238         }
 239
 240         assign_tracks ();
 241         setup_scrollbars ();
 242         Refresh ();
 243 }
 244
 245 void
 246 Timeline::film_content_changed (int property, bool frequent)
 247 {
 248         ensure_ui_thread ();
 249
 250         if (property == AudioContentProperty::STREAMS) {
 251                 recreate_views ();
 252         } else if (!frequent) {
 253                 setup_scrollbars ();
 254                 Refresh ();
 255         }
 256 }
 257
 258 template <class T>
 259 int
 260 place (TimelineViewList& views, int& tracks)
 261 {
 262         int const base = tracks;
 263
 264         BOOST_FOREACH (shared_ptr<TimelineView> i, views) {
 265                 if (!dynamic_pointer_cast<T>(i)) {
 266                         continue;
 267                 }
 268
 269                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (i);
 270
 271                 int t = base;
 272
 273                 shared_ptr<Content> content = cv->content();
 274                 DCPTimePeriod const content_period (content->position(), content->end());
 275
 276                 while (true) {
 277                         TimelineViewList::iterator j = views.begin();
 278                         while (j != views.end()) {
 279                                 shared_ptr<T> test = dynamic_pointer_cast<T> (*j);
 280                                 if (!test) {
 281                                         ++j;
 282                                         continue;
 283                                 }
 284
 285                                 shared_ptr<Content> test_content = test->content();
 286                                 if (
 287                                         test->track() && test->track().get() == t &&
 288                                         content_period.overlap(DCPTimePeriod(test_content->position(), test_content->end()))) {
 289                                         /* we have an overlap on track `t' */
 290                                         ++t;
 291                                         break;
 292                                 }
 293
 294                                 ++j;
 295                         }
 296
 297                         if (j == views.end ()) {
 298                                 /* no overlap on `t' */
 299                                 break;
 300                         }
 301                 }
 302
 303                 cv->set_track (t);
 304                 tracks = max (tracks, t + 1);
 305         }
 306
 307         return tracks - base;
 308 }
 309
 310 /** Compare the mapped output channels of two TimelineViews, so we can into
 311  *  order of first mapped DCP channel.
 312  */
 313 struct AudioMappingComparator {
 314         bool operator()(shared_ptr<TimelineView> a, shared_ptr<TimelineView> b) {
 315                 int la = -1;
 316                 shared_ptr<TimelineAudioContentView> cva = dynamic_pointer_cast<TimelineAudioContentView>(a);
 317                 if (cva) {
 318                         list<int> oc = cva->content()->audio->mapping().mapped_output_channels();
 319                         la = *min_element(boost::begin(oc), boost::end(oc));
 320                 }
 321                 int lb = -1;
 322                 shared_ptr<TimelineAudioContentView> cvb = dynamic_pointer_cast<TimelineAudioContentView>(b);
 323                 if (cvb) {
 324                         list<int> oc = cvb->content()->audio->mapping().mapped_output_channels();
 325                         lb = *min_element(boost::begin(oc), boost::end(oc));
 326                 }
 327                 return la < lb;
 328         }
 329 };
 330
 331 void
 332 Timeline::assign_tracks ()
 333 {
 334         /* Tracks are:
 335            Video (mono or left-eye)
 336            Video (right-eye)
 337            Subtitle 1
 338            Subtitle 2
 339            Subtitle N
 340            Atmos
 341            Audio 1
 342            Audio 2
 343            Audio N
 344         */
 345
 346         _tracks = 0;
 347
 348         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 349                 shared_ptr<TimelineContentView> c = dynamic_pointer_cast<TimelineContentView> (*i);
 350                 if (c) {
 351                         c->unset_track ();
 352                 }
 353         }
 354
 355         /* Video */
 356
 357         bool have_3d = false;
 358         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 359                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 360                 if (!cv) {
 361                         continue;
 362                 }
 363
 364                 /* Video on tracks 0 and maybe 1 (left and right eye) */
 365                 if (cv->content()->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
 366                         cv->set_track (1);
 367                         _tracks = max (_tracks, 2);
 368                         have_3d = true;
 369                 } else {
 370                         cv->set_track (0);
 371                 }
 372         }
 373
 374         _tracks = max (_tracks, 1);
 375
 376         /* Subtitle */
 377
 378         int const subtitle_tracks = place<TimelineTextContentView> (_views, _tracks);
 379
 380         /* Atmos */
 381
 382         bool have_atmos = false;
 383         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 384                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 385                 if (!cv) {
 386                         continue;
 387                 }
 388                 if (dynamic_pointer_cast<TimelineAtmosContentView> (i)) {
 389                         cv->set_track (_tracks - 1);
 390                         have_atmos = true;
 391                 }
 392         }
 393
 394         if (have_atmos) {
 395                 ++_tracks;
 396         }
 397
 398         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 399            DCP channel index.
 400         */
 401
 402         TimelineViewList views = _views;
 403         sort(views.begin(), views.end(), AudioMappingComparator());
 404         int const audio_tracks = place<TimelineAudioContentView> (views, _tracks);
 405
 406         _labels_view->set_3d (have_3d);
 407         _labels_view->set_audio_tracks (audio_tracks);
 408         _labels_view->set_subtitle_tracks (subtitle_tracks);
 409         _labels_view->set_atmos (have_atmos);
 410
 411         _time_axis_view->set_y (tracks());
 412         _reels_view->set_y (8);
 413 }
 414
 415 int
 416 Timeline::tracks () const
 417 {
 418         return _tracks;
 419 }
 420
 421 void
 422 Timeline::setup_scrollbars ()
 423 {
 424         shared_ptr<const Film> film = _film.lock ();
 425         if (!film || !_pixels_per_second) {
 426                 return;
 427         }
 428
 429         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 430
 431         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 432         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 433         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 434         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 435 }
 436
 437 shared_ptr<TimelineView>
 438 Timeline::event_to_view (wxMouseEvent& ev)
 439 {
 440         /* Search backwards through views so that we find the uppermost one first */
 441         TimelineViewList::reverse_iterator i = _views.rbegin();
 442         Position<int> const p (ev.GetX(), ev.GetY());
 443         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 444                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 445                 ++i;
 446         }
 447
 448         if (i == _views.rend ()) {
 449                 return shared_ptr<TimelineView> ();
 450         }
 451
 452         return *i;
 453 }
 454
 455 void
 456 Timeline::left_down (wxMouseEvent& ev)
 457 {
 458         _left_down = true;
 459         _down_point = ev.GetPosition ();
 460
 461         switch (_tool) {
 462         case SELECT:
 463                 left_down_select (ev);
 464                 break;
 465         case ZOOM:
 466         case ZOOM_ALL:
 467         case SNAP:
 468         case SEQUENCE:
 469                 /* Nothing to do */
 470                 break;
 471         }
 472 }
 473
 474 void
 475 Timeline::left_down_select (wxMouseEvent& ev)
 476 {
 477         shared_ptr<TimelineView> view = event_to_view (ev);
 478         shared_ptr<TimelineContentView> content_view = dynamic_pointer_cast<TimelineContentView> (view);
 479
 480         _down_view.reset ();
 481
 482         if (content_view) {
 483                 _down_view = content_view;
 484                 _down_view_position = content_view->content()->position ();
 485         }
 486
 487         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 488                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 489                 if (!cv) {
 490                         continue;
 491                 }
 492
 493                 if (!ev.ShiftDown ()) {
 494                         cv->set_selected (view == *i);
 495                 }
 496         }
 497
 498         if (content_view && ev.ShiftDown ()) {
 499                 content_view->set_selected (!content_view->selected ());
 500         }
 501
 502         _first_move = false;
 503
 504         if (_down_view) {
 505                 /* Pre-compute the points that we might snap to */
 506                 for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 507                         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 508                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 509                                 continue;
 510                         }
 511
 512                         _start_snaps.push_back (cv->content()->position());
 513                         _end_snaps.push_back (cv->content()->position());
 514                         _start_snaps.push_back (cv->content()->end());
 515                         _end_snaps.push_back (cv->content()->end());
 516
 517                         BOOST_FOREACH (DCPTime i, cv->content()->reel_split_points()) {
 518                                 _start_snaps.push_back (i);
 519                         }
 520                 }
 521
 522                 /* Tell everyone that things might change frequently during the drag */
 523                 _down_view->content()->set_change_signals_frequent (true);
 524         }
 525 }
 526
 527 void
 528 Timeline::left_up (wxMouseEvent& ev)
 529 {
 530         _left_down = false;
 531
 532         switch (_tool) {
 533         case SELECT:
 534                 left_up_select (ev);
 535                 break;
 536         case ZOOM:
 537                 left_up_zoom (ev);
 538                 break;
 539         case ZOOM_ALL:
 540         case SNAP:
 541         case SEQUENCE:
 542                 break;
 543         }
 544 }
 545
 546 void
 547 Timeline::left_up_select (wxMouseEvent& ev)
 548 {
 549         if (_down_view) {
 550                 _down_view->content()->set_change_signals_frequent (false);
 551         }
 552
 553         _content_panel->set_selection (selected_content ());
 554         set_position_from_event (ev);
 555
 556         /* Clear up up the stuff we don't do during drag */
 557         assign_tracks ();
 558         setup_scrollbars ();
 559         Refresh ();
 560
 561         _start_snaps.clear ();
 562         _end_snaps.clear ();
 563 }
 564
 565 void
 566 Timeline::left_up_zoom (wxMouseEvent& ev)
 567 {
 568         _zoom_point = ev.GetPosition ();
 569
 570         int vsx, vsy;
 571         _main_canvas->GetViewStart (&vsx, &vsy);
 572
 573         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 574         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 575
 576         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 577                 /* Very small zoom rectangle: we assume it wasn't intentional */
 578                 return;
 579         }
 580
 581         DCPTime const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 582         DCPTime const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 583         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 584
 585         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 586         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 587         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 588
 589         setup_scrollbars ();
 590         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 591         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 592         _labels_canvas->Scroll (0, y);
 593
 594         _zoom_point = optional<wxPoint> ();
 595         Refresh ();
 596 }
 597
 598 void
 599 Timeline::set_pixels_per_track (int h)
 600 {
 601         _pixels_per_track = max(_minimum_pixels_per_track, h);
 602 }
 603
 604 void
 605 Timeline::mouse_moved (wxMouseEvent& ev)
 606 {
 607         switch (_tool) {
 608         case SELECT:
 609                 mouse_moved_select (ev);
 610                 break;
 611         case ZOOM:
 612                 mouse_moved_zoom (ev);
 613                 break;
 614         case ZOOM_ALL:
 615         case SNAP:
 616         case SEQUENCE:
 617                 break;
 618         }
 619 }
 620
 621 void
 622 Timeline::mouse_moved_select (wxMouseEvent& ev)
 623 {
 624         if (!_left_down) {
 625                 return;
 626         }
 627
 628         set_position_from_event (ev);
 629 }
 630
 631 void
 632 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 633 {
 634         if (!_left_down) {
 635                 return;
 636         }
 637
 638         _zoom_point = ev.GetPosition ();
 639         Refresh ();
 640 }
 641
 642 void
 643 Timeline::right_down (wxMouseEvent& ev)
 644 {
 645         switch (_tool) {
 646         case SELECT:
 647                 right_down_select (ev);
 648                 break;
 649         case ZOOM:
 650                 /* Zoom out */
 651                 set_pixels_per_second (*_pixels_per_second / 2);
 652                 set_pixels_per_track (_pixels_per_track / 2);
 653                 setup_scrollbars ();
 654                 Refresh ();
 655                 break;
 656         case ZOOM_ALL:
 657         case SNAP:
 658         case SEQUENCE:
 659                 break;
 660         }
 661 }
 662
 663 void
 664 Timeline::right_down_select (wxMouseEvent& ev)
 665 {
 666         shared_ptr<TimelineView> view = event_to_view (ev);
 667         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (view);
 668         if (!cv) {
 669                 return;
 670         }
 671
 672         if (!cv->selected ()) {
 673                 clear_selection ();
 674                 cv->set_selected (true);
 675         }
 676
 677         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 678 }
 679
 680 void
 681 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 682 {
 683         DCPTime const d = a - b;
 684         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 685                 nearest_distance = d;
 686         }
 687 }
 688
 689 void
 690 Timeline::set_position_from_event (wxMouseEvent& ev)
 691 {
 692         if (!_pixels_per_second) {
 693                 return;
 694         }
 695
 696         double const pps = _pixels_per_second.get ();
 697
 698         wxPoint const p = ev.GetPosition();
 699
 700         if (!_first_move) {
 701                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 702                    before the drag is considered to have started.
 703                 */
 704                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 705                 if (dist < 8) {
 706                         return;
 707                 }
 708                 _first_move = true;
 709         }
 710
 711         if (!_down_view) {
 712                 return;
 713         }
 714
 715         DCPTime new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 716
 717         if (_snap) {
 718
 719                 DCPTime const new_end = new_position + _down_view->content()->length_after_trim();
 720                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 721                    positive is right).
 722                 */
 723                 optional<DCPTime> nearest_distance;
 724
 725                 /* Find the nearest snap point */
 726
 727                 BOOST_FOREACH (DCPTime i, _start_snaps) {
 728                         maybe_snap (i, new_position, nearest_distance);
 729                 }
 730
 731                 BOOST_FOREACH (DCPTime i, _end_snaps) {
 732                         maybe_snap (i, new_end, nearest_distance);
 733                 }
 734
 735                 if (nearest_distance) {
 736                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 737                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 738                                 new_position += nearest_distance.get ();
 739                         }
 740                 }
 741         }
 742
 743         if (new_position < DCPTime ()) {
 744                 new_position = DCPTime ();
 745         }
 746
 747         _down_view->content()->set_position (new_position);
 748
 749         shared_ptr<Film> film = _film.lock ();
 750         DCPOMATIC_ASSERT (film);
 751         film->set_sequence (false);
 752 }
 753
 754 void
 755 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 756 {
 757         RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 758 }
 759
 760 shared_ptr<const Film>
 761 Timeline::film () const
 762 {
 763         return _film.lock ();
 764 }
 765
 766 void
 767 Timeline::resized ()
 768 {
 769         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 770                 zoom_all ();
 771                 _first_resize = false;
 772         }
 773         setup_scrollbars ();
 774 }
 775
 776 void
 777 Timeline::clear_selection ()
 778 {
 779         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 780                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 781                 if (cv) {
 782                         cv->set_selected (false);
 783                 }
 784         }
 785 }
 786
 787 TimelineContentViewList
 788 Timeline::selected_views () const
 789 {
 790         TimelineContentViewList sel;
 791
 792         for (TimelineViewList::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 793                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 794                 if (cv && cv->selected()) {
 795                         sel.push_back (cv);
 796                 }
 797         }
 798
 799         return sel;
 800 }
 801
 802 ContentList
 803 Timeline::selected_content () const
 804 {
 805         ContentList sel;
 806         TimelineContentViewList views = selected_views ();
 807
 808         for (TimelineContentViewList::const_iterator i = views.begin(); i != views.end(); ++i) {
 809                 sel.push_back ((*i)->content ());
 810         }
 811
 812         return sel;
 813 }
 814
 815 void
 816 Timeline::set_selection (ContentList selection)
 817 {
 818         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 819                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 820                 if (cv) {
 821                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 822                 }
 823         }
 824 }
 825
 826 int
 827 Timeline::tracks_y_offset () const
 828 {
 829         return _reels_view->bbox().height + 4;
 830 }
 831
 832 int
 833 Timeline::width () const
 834 {
 835         return _main_canvas->GetVirtualSize().GetWidth();
 836 }
 837
 838 void
 839 Timeline::scrolled (wxScrollWinEvent& ev)
 840 {
 841         if (ev.GetOrientation() == wxVERTICAL) {
 842                 int x, y;
 843                 _main_canvas->GetViewStart (&x, &y);
 844                 _labels_canvas->Scroll (0, y);
 845         }
 846         ev.Skip ();
 847 }
 848
 849 void
 850 Timeline::tool_clicked (Tool t)
 851 {
 852         switch (t) {
 853         case ZOOM:
 854         case SELECT:
 855                 _tool = t;
 856                 break;
 857         case ZOOM_ALL:
 858                 zoom_all ();
 859                 break;
 860         case SNAP:
 861         case SEQUENCE:
 862                 break;
 863         }
 864 }
 865
 866 void
 867 Timeline::zoom_all ()
 868 {
 869         shared_ptr<Film> film = _film.lock ();
 870         DCPOMATIC_ASSERT (film);
 871         set_pixels_per_second ((_main_canvas->GetSize().GetWidth() - 32) / film->length().seconds());
 872         set_pixels_per_track ((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / _tracks);
 873         setup_scrollbars ();
 874         _main_canvas->Scroll (0, 0);
 875         _labels_canvas->Scroll (0, 0);
 876         Refresh ();
 877 }