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 std::abs;
  52 using boost::shared_ptr;
  53 using boost::weak_ptr;
  54 using boost::dynamic_pointer_cast;
  55 using boost::bind;
  56 using boost::optional;
  57
  58 /* 3 hours in 640 pixels */
  59 double const Timeline::_minimum_pixels_per_second = 640.0 / (60 * 60 * 3);
  60 int const Timeline::_minimum_pixels_per_track = 16;
  61
  62 Timeline::Timeline (wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film)
  63         : wxPanel (parent, wxID_ANY)
  64         , _labels_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  65         , _main_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  66         , _content_panel (cp)
  67         , _film (film)
  68         , _time_axis_view (new TimelineTimeAxisView (*this, 64))
  69         , _reels_view (new TimelineReelsView (*this, 32))
  70         , _labels_view (new TimelineLabelsView (*this))
  71         , _tracks (0)
  72         , _left_down (false)
  73         , _down_view_position (0)
  74         , _first_move (false)
  75         , _menu (this)
  76         , _snap (true)
  77         , _tool (SELECT)
  78         , _x_scroll_rate (16)
  79         , _y_scroll_rate (16)
  80         , _pixels_per_track (48)
  81         , _first_resize (true)
  82 {
  83 #ifndef __WXOSX__
  84         _labels_canvas->SetDoubleBuffered (true);
  85         _main_canvas->SetDoubleBuffered (true);
  86 #endif
  87
  88         wxSizer* sizer = new wxBoxSizer (wxHORIZONTAL);
  89         sizer->Add (_labels_canvas, 0, wxEXPAND);
  90         _labels_canvas->SetMinSize (wxSize (_labels_view->bbox().width, -1));
  91         sizer->Add (_main_canvas, 1, wxEXPAND);
  92         SetSizer (sizer);
  93
  94         _labels_canvas->Bind (wxEVT_PAINT,      boost::bind (&Timeline::paint_labels, this));
  95         _main_canvas->Bind   (wxEVT_PAINT,      boost::bind (&Timeline::paint_main,   this));
  96         _main_canvas->Bind   (wxEVT_LEFT_DOWN,  boost::bind (&Timeline::left_down,    this, _1));
  97         _main_canvas->Bind   (wxEVT_LEFT_UP,    boost::bind (&Timeline::left_up,      this, _1));
  98         _main_canvas->Bind   (wxEVT_RIGHT_DOWN, boost::bind (&Timeline::right_down,   this, _1));
  99         _main_canvas->Bind   (wxEVT_MOTION,     boost::bind (&Timeline::mouse_moved,  this, _1));
 100         _main_canvas->Bind   (wxEVT_SIZE,       boost::bind (&Timeline::resized,      this));
 101         _main_canvas->Bind   (wxEVT_SCROLLWIN_TOP,        boost::bind (&Timeline::scrolled,     this, _1));
 102         _main_canvas->Bind   (wxEVT_SCROLLWIN_BOTTOM,     boost::bind (&Timeline::scrolled,     this, _1));
 103         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 104         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 105         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 106         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 107         _main_canvas->Bind   (wxEVT_SCROLLWIN_THUMBTRACK, boost::bind (&Timeline::scrolled,     this, _1));
 108
 109         film_change (CHANGE_TYPE_DONE, Film::CONTENT);
 110
 111         SetMinSize (wxSize (640, 4 * pixels_per_track() + 96));
 112
 113         _film_changed_connection = film->Change.connect (bind (&Timeline::film_change, this, _1, _2));
 114         _film_content_change_connection = film->ContentChange.connect (bind (&Timeline::film_content_change, this, _1, _3, _4));
 115
 116         setup_scrollbars ();
 117         _labels_canvas->ShowScrollbars (wxSHOW_SB_NEVER, wxSHOW_SB_NEVER);
 118 }
 119
 120 void
 121 Timeline::set_pixels_per_second (double pps)
 122 {
 123         _pixels_per_second = max (_minimum_pixels_per_second, pps);
 124 }
 125
 126 void
 127 Timeline::paint_labels ()
 128 {
 129         wxPaintDC dc (_labels_canvas);
 130
 131         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 132         if (!gc) {
 133                 return;
 134         }
 135
 136         int vsx, vsy;
 137         _labels_canvas->GetViewStart (&vsx, &vsy);
 138         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate + tracks_y_offset());
 139
 140         _labels_view->paint (gc, list<dcpomatic::Rect<int> >());
 141
 142         delete gc;
 143 }
 144
 145 void
 146 Timeline::paint_main ()
 147 {
 148         wxPaintDC dc (_main_canvas);
 149         _main_canvas->DoPrepareDC (dc);
 150
 151         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 152         if (!gc) {
 153                 return;
 154         }
 155
 156         int vsx, vsy;
 157         _main_canvas->GetViewStart (&vsx, &vsy);
 158         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate);
 159
 160         gc->SetAntialiasMode (wxANTIALIAS_DEFAULT);
 161
 162         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 163
 164                 shared_ptr<TimelineContentView> ic = dynamic_pointer_cast<TimelineContentView> (i);
 165
 166                 /* Find areas of overlap with other content views, so that we can plot them */
 167                 list<dcpomatic::Rect<int> > overlaps;
 168                 BOOST_FOREACH (shared_ptr<TimelineView> j, _views) {
 169                         shared_ptr<TimelineContentView> jc = dynamic_pointer_cast<TimelineContentView> (j);
 170                         /* No overlap with non-content views, views no different tracks, audio views or non-active views */
 171                         if (!ic || !jc || i == j || ic->track() != jc->track() || ic->track().get_value_or(2) >= 2 || !ic->active() || !jc->active()) {
 172                                 continue;
 173                         }
 174
 175                         optional<dcpomatic::Rect<int> > r = j->bbox().intersection (i->bbox());
 176                         if (r) {
 177                                 overlaps.push_back (r.get ());
 178                         }
 179                 }
 180
 181                 i->paint (gc, overlaps);
 182         }
 183
 184         if (_zoom_point) {
 185                 /* Translate back as _down_point and _zoom_point do not take scroll into account */
 186                 gc->Translate (vsx * _x_scroll_rate, vsy * _y_scroll_rate);
 187                 gc->SetPen (*wxBLACK_PEN);
 188                 gc->SetBrush (*wxTRANSPARENT_BRUSH);
 189                 gc->DrawRectangle (
 190                         min (_down_point.x, _zoom_point->x),
 191                         min (_down_point.y, _zoom_point->y),
 192                         abs (_down_point.x - _zoom_point->x),
 193                         abs (_down_point.y - _zoom_point->y)
 194                         );
 195         }
 196
 197         delete gc;
 198 }
 199
 200 void
 201 Timeline::film_change (ChangeType type, Film::Property p)
 202 {
 203         if (type != CHANGE_TYPE_DONE) {
 204                 return;
 205         }
 206
 207         if (p == Film::CONTENT || p == Film::REEL_TYPE || p == Film::REEL_LENGTH) {
 208                 ensure_ui_thread ();
 209                 recreate_views ();
 210         } else if (p == Film::CONTENT_ORDER) {
 211                 Refresh ();
 212         }
 213 }
 214
 215 void
 216 Timeline::recreate_views ()
 217 {
 218         shared_ptr<const Film> film = _film.lock ();
 219         if (!film) {
 220                 return;
 221         }
 222
 223         _views.clear ();
 224         _views.push_back (_time_axis_view);
 225         _views.push_back (_reels_view);
 226
 227         BOOST_FOREACH (shared_ptr<Content> i, film->content ()) {
 228                 if (i->video) {
 229                         _views.push_back (shared_ptr<TimelineView> (new TimelineVideoContentView (*this, i)));
 230                 }
 231
 232                 if (i->audio && !i->audio->mapping().mapped_output_channels().empty ()) {
 233                         _views.push_back (shared_ptr<TimelineView> (new TimelineAudioContentView (*this, i)));
 234                 }
 235
 236                 BOOST_FOREACH (shared_ptr<TextContent> j, i->text) {
 237                         _views.push_back (shared_ptr<TimelineView> (new TimelineTextContentView (*this, i, j)));
 238                 }
 239
 240                 if (dynamic_pointer_cast<AtmosMXFContent> (i)) {
 241                         _views.push_back (shared_ptr<TimelineView> (new TimelineAtmosContentView (*this, i)));
 242                 }
 243         }
 244
 245         assign_tracks ();
 246         setup_scrollbars ();
 247         Refresh ();
 248 }
 249
 250 void
 251 Timeline::film_content_change (ChangeType type, int property, bool frequent)
 252 {
 253         if (type != CHANGE_TYPE_DONE) {
 254                 return;
 255         }
 256
 257         ensure_ui_thread ();
 258
 259         if (property == AudioContentProperty::STREAMS) {
 260                 recreate_views ();
 261         } else if (property == ContentProperty::POSITION || property == ContentProperty::LENGTH) {
 262                 _reels_view->force_redraw ();
 263         } else if (!frequent) {
 264                 setup_scrollbars ();
 265                 Refresh ();
 266         }
 267 }
 268
 269 template <class T>
 270 int
 271 place (TimelineViewList& views, int& tracks)
 272 {
 273         int const base = tracks;
 274
 275         BOOST_FOREACH (shared_ptr<TimelineView> i, views) {
 276                 if (!dynamic_pointer_cast<T>(i)) {
 277                         continue;
 278                 }
 279
 280                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (i);
 281
 282                 int t = base;
 283
 284                 shared_ptr<Content> content = cv->content();
 285                 DCPTimePeriod const content_period (content->position(), content->end());
 286
 287                 while (true) {
 288                         TimelineViewList::iterator j = views.begin();
 289                         while (j != views.end()) {
 290                                 shared_ptr<T> test = dynamic_pointer_cast<T> (*j);
 291                                 if (!test) {
 292                                         ++j;
 293                                         continue;
 294                                 }
 295
 296                                 shared_ptr<Content> test_content = test->content();
 297                                 if (
 298                                         test->track() && test->track().get() == t &&
 299                                         content_period.overlap(DCPTimePeriod(test_content->position(), test_content->end()))) {
 300                                         /* we have an overlap on track `t' */
 301                                         ++t;
 302                                         break;
 303                                 }
 304
 305                                 ++j;
 306                         }
 307
 308                         if (j == views.end ()) {
 309                                 /* no overlap on `t' */
 310                                 break;
 311                         }
 312                 }
 313
 314                 cv->set_track (t);
 315                 tracks = max (tracks, t + 1);
 316         }
 317
 318         return tracks - base;
 319 }
 320
 321 /** Compare the mapped output channels of two TimelineViews, so we can into
 322  *  order of first mapped DCP channel.
 323  */
 324 struct AudioMappingComparator {
 325         bool operator()(shared_ptr<TimelineView> a, shared_ptr<TimelineView> b) {
 326                 int la = -1;
 327                 shared_ptr<TimelineAudioContentView> cva = dynamic_pointer_cast<TimelineAudioContentView>(a);
 328                 if (cva) {
 329                         list<int> oc = cva->content()->audio->mapping().mapped_output_channels();
 330                         la = *min_element(boost::begin(oc), boost::end(oc));
 331                 }
 332                 int lb = -1;
 333                 shared_ptr<TimelineAudioContentView> cvb = dynamic_pointer_cast<TimelineAudioContentView>(b);
 334                 if (cvb) {
 335                         list<int> oc = cvb->content()->audio->mapping().mapped_output_channels();
 336                         lb = *min_element(boost::begin(oc), boost::end(oc));
 337                 }
 338                 return la < lb;
 339         }
 340 };
 341
 342 void
 343 Timeline::assign_tracks ()
 344 {
 345         /* Tracks are:
 346            Video (mono or left-eye)
 347            Video (right-eye)
 348            Text 1
 349            Text 2
 350            Text N
 351            Atmos
 352            Audio 1
 353            Audio 2
 354            Audio N
 355         */
 356
 357         _tracks = 0;
 358
 359         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 360                 shared_ptr<TimelineContentView> c = dynamic_pointer_cast<TimelineContentView> (*i);
 361                 if (c) {
 362                         c->unset_track ();
 363                 }
 364         }
 365
 366         /* Video */
 367
 368         bool have_3d = false;
 369         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 370                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 371                 if (!cv) {
 372                         continue;
 373                 }
 374
 375                 /* Video on tracks 0 and maybe 1 (left and right eye) */
 376                 if (cv->content()->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
 377                         cv->set_track (1);
 378                         _tracks = max (_tracks, 2);
 379                         have_3d = true;
 380                 } else {
 381                         cv->set_track (0);
 382                 }
 383         }
 384
 385         _tracks = max (_tracks, 1);
 386
 387         /* Texts */
 388
 389         int const text_tracks = place<TimelineTextContentView> (_views, _tracks);
 390
 391         /* Atmos */
 392
 393         bool have_atmos = false;
 394         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 395                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 396                 if (!cv) {
 397                         continue;
 398                 }
 399                 if (dynamic_pointer_cast<TimelineAtmosContentView> (i)) {
 400                         cv->set_track (_tracks - 1);
 401                         have_atmos = true;
 402                 }
 403         }
 404
 405         if (have_atmos) {
 406                 ++_tracks;
 407         }
 408
 409         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 410            DCP channel index.
 411         */
 412
 413         TimelineViewList views = _views;
 414         sort(views.begin(), views.end(), AudioMappingComparator());
 415         int const audio_tracks = place<TimelineAudioContentView> (views, _tracks);
 416
 417         _labels_view->set_3d (have_3d);
 418         _labels_view->set_audio_tracks (audio_tracks);
 419         _labels_view->set_text_tracks (text_tracks);
 420         _labels_view->set_atmos (have_atmos);
 421
 422         _time_axis_view->set_y (tracks());
 423         _reels_view->set_y (8);
 424 }
 425
 426 int
 427 Timeline::tracks () const
 428 {
 429         return _tracks;
 430 }
 431
 432 void
 433 Timeline::setup_scrollbars ()
 434 {
 435         shared_ptr<const Film> film = _film.lock ();
 436         if (!film || !_pixels_per_second) {
 437                 return;
 438         }
 439
 440         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 441
 442         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 443         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 444         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 445         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 446 }
 447
 448 shared_ptr<TimelineView>
 449 Timeline::event_to_view (wxMouseEvent& ev)
 450 {
 451         /* Search backwards through views so that we find the uppermost one first */
 452         TimelineViewList::reverse_iterator i = _views.rbegin();
 453         Position<int> const p (ev.GetX(), ev.GetY());
 454         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 455                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 456                 ++i;
 457         }
 458
 459         if (i == _views.rend ()) {
 460                 return shared_ptr<TimelineView> ();
 461         }
 462
 463         return *i;
 464 }
 465
 466 void
 467 Timeline::left_down (wxMouseEvent& ev)
 468 {
 469         _left_down = true;
 470         _down_point = ev.GetPosition ();
 471
 472         switch (_tool) {
 473         case SELECT:
 474                 left_down_select (ev);
 475                 break;
 476         case ZOOM:
 477         case ZOOM_ALL:
 478         case SNAP:
 479         case SEQUENCE:
 480                 /* Nothing to do */
 481                 break;
 482         }
 483 }
 484
 485 void
 486 Timeline::left_down_select (wxMouseEvent& ev)
 487 {
 488         shared_ptr<TimelineView> view = event_to_view (ev);
 489         shared_ptr<TimelineContentView> content_view = dynamic_pointer_cast<TimelineContentView> (view);
 490
 491         _down_view.reset ();
 492
 493         if (content_view) {
 494                 _down_view = content_view;
 495                 _down_view_position = content_view->content()->position ();
 496         }
 497
 498         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 499                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 500                 if (!cv) {
 501                         continue;
 502                 }
 503
 504                 if (!ev.ShiftDown ()) {
 505                         cv->set_selected (view == *i);
 506                 }
 507         }
 508
 509         if (content_view && ev.ShiftDown ()) {
 510                 content_view->set_selected (!content_view->selected ());
 511         }
 512
 513         _first_move = false;
 514
 515         if (_down_view) {
 516                 /* Pre-compute the points that we might snap to */
 517                 for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 518                         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 519                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 520                                 continue;
 521                         }
 522
 523                         _start_snaps.push_back (cv->content()->position());
 524                         _end_snaps.push_back (cv->content()->position());
 525                         _start_snaps.push_back (cv->content()->end());
 526                         _end_snaps.push_back (cv->content()->end());
 527
 528                         BOOST_FOREACH (DCPTime i, cv->content()->reel_split_points()) {
 529                                 _start_snaps.push_back (i);
 530                         }
 531                 }
 532
 533                 /* Tell everyone that things might change frequently during the drag */
 534                 _down_view->content()->set_change_signals_frequent (true);
 535         }
 536 }
 537
 538 void
 539 Timeline::left_up (wxMouseEvent& ev)
 540 {
 541         _left_down = false;
 542
 543         switch (_tool) {
 544         case SELECT:
 545                 left_up_select (ev);
 546                 break;
 547         case ZOOM:
 548                 left_up_zoom (ev);
 549                 break;
 550         case ZOOM_ALL:
 551         case SNAP:
 552         case SEQUENCE:
 553                 break;
 554         }
 555 }
 556
 557 void
 558 Timeline::left_up_select (wxMouseEvent& ev)
 559 {
 560         if (_down_view) {
 561                 _down_view->content()->set_change_signals_frequent (false);
 562         }
 563
 564         _content_panel->set_selection (selected_content ());
 565         set_position_from_event (ev);
 566
 567         /* Clear up up the stuff we don't do during drag */
 568         assign_tracks ();
 569         setup_scrollbars ();
 570         Refresh ();
 571
 572         _start_snaps.clear ();
 573         _end_snaps.clear ();
 574 }
 575
 576 void
 577 Timeline::left_up_zoom (wxMouseEvent& ev)
 578 {
 579         _zoom_point = ev.GetPosition ();
 580
 581         int vsx, vsy;
 582         _main_canvas->GetViewStart (&vsx, &vsy);
 583
 584         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 585         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 586
 587         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 588                 /* Very small zoom rectangle: we assume it wasn't intentional */
 589                 return;
 590         }
 591
 592         DCPTime const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 593         DCPTime const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 594         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 595
 596         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 597         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 598         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 599
 600         setup_scrollbars ();
 601         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 602         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 603         _labels_canvas->Scroll (0, y);
 604
 605         _zoom_point = optional<wxPoint> ();
 606         Refresh ();
 607 }
 608
 609 void
 610 Timeline::set_pixels_per_track (int h)
 611 {
 612         _pixels_per_track = max(_minimum_pixels_per_track, h);
 613 }
 614
 615 void
 616 Timeline::mouse_moved (wxMouseEvent& ev)
 617 {
 618         switch (_tool) {
 619         case SELECT:
 620                 mouse_moved_select (ev);
 621                 break;
 622         case ZOOM:
 623                 mouse_moved_zoom (ev);
 624                 break;
 625         case ZOOM_ALL:
 626         case SNAP:
 627         case SEQUENCE:
 628                 break;
 629         }
 630 }
 631
 632 void
 633 Timeline::mouse_moved_select (wxMouseEvent& ev)
 634 {
 635         if (!_left_down) {
 636                 return;
 637         }
 638
 639         set_position_from_event (ev);
 640 }
 641
 642 void
 643 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 644 {
 645         if (!_left_down) {
 646                 return;
 647         }
 648
 649         _zoom_point = ev.GetPosition ();
 650         Refresh ();
 651 }
 652
 653 void
 654 Timeline::right_down (wxMouseEvent& ev)
 655 {
 656         switch (_tool) {
 657         case SELECT:
 658                 right_down_select (ev);
 659                 break;
 660         case ZOOM:
 661                 /* Zoom out */
 662                 set_pixels_per_second (*_pixels_per_second / 2);
 663                 set_pixels_per_track (_pixels_per_track / 2);
 664                 setup_scrollbars ();
 665                 Refresh ();
 666                 break;
 667         case ZOOM_ALL:
 668         case SNAP:
 669         case SEQUENCE:
 670                 break;
 671         }
 672 }
 673
 674 void
 675 Timeline::right_down_select (wxMouseEvent& ev)
 676 {
 677         shared_ptr<TimelineView> view = event_to_view (ev);
 678         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (view);
 679         if (!cv) {
 680                 return;
 681         }
 682
 683         if (!cv->selected ()) {
 684                 clear_selection ();
 685                 cv->set_selected (true);
 686         }
 687
 688         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 689 }
 690
 691 void
 692 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 693 {
 694         DCPTime const d = a - b;
 695         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 696                 nearest_distance = d;
 697         }
 698 }
 699
 700 void
 701 Timeline::set_position_from_event (wxMouseEvent& ev)
 702 {
 703         if (!_pixels_per_second) {
 704                 return;
 705         }
 706
 707         double const pps = _pixels_per_second.get ();
 708
 709         wxPoint const p = ev.GetPosition();
 710
 711         if (!_first_move) {
 712                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 713                    before the drag is considered to have started.
 714                 */
 715                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 716                 if (dist < 8) {
 717                         return;
 718                 }
 719                 _first_move = true;
 720         }
 721
 722         if (!_down_view) {
 723                 return;
 724         }
 725
 726         DCPTime new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 727
 728         if (_snap) {
 729
 730                 DCPTime const new_end = new_position + _down_view->content()->length_after_trim();
 731                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 732                    positive is right).
 733                 */
 734                 optional<DCPTime> nearest_distance;
 735
 736                 /* Find the nearest snap point */
 737
 738                 BOOST_FOREACH (DCPTime i, _start_snaps) {
 739                         maybe_snap (i, new_position, nearest_distance);
 740                 }
 741
 742                 BOOST_FOREACH (DCPTime i, _end_snaps) {
 743                         maybe_snap (i, new_end, nearest_distance);
 744                 }
 745
 746                 if (nearest_distance) {
 747                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 748                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 749                                 new_position += nearest_distance.get ();
 750                         }
 751                 }
 752         }
 753
 754         if (new_position < DCPTime ()) {
 755                 new_position = DCPTime ();
 756         }
 757
 758         _down_view->content()->set_position (new_position);
 759
 760         shared_ptr<Film> film = _film.lock ();
 761         DCPOMATIC_ASSERT (film);
 762         film->set_sequence (false);
 763 }
 764
 765 void
 766 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 767 {
 768         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 769 }
 770
 771 shared_ptr<const Film>
 772 Timeline::film () const
 773 {
 774         return _film.lock ();
 775 }
 776
 777 void
 778 Timeline::resized ()
 779 {
 780         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 781                 zoom_all ();
 782                 _first_resize = false;
 783         }
 784         setup_scrollbars ();
 785 }
 786
 787 void
 788 Timeline::clear_selection ()
 789 {
 790         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 791                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 792                 if (cv) {
 793                         cv->set_selected (false);
 794                 }
 795         }
 796 }
 797
 798 TimelineContentViewList
 799 Timeline::selected_views () const
 800 {
 801         TimelineContentViewList sel;
 802
 803         for (TimelineViewList::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 804                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 805                 if (cv && cv->selected()) {
 806                         sel.push_back (cv);
 807                 }
 808         }
 809
 810         return sel;
 811 }
 812
 813 ContentList
 814 Timeline::selected_content () const
 815 {
 816         ContentList sel;
 817         TimelineContentViewList views = selected_views ();
 818
 819         for (TimelineContentViewList::const_iterator i = views.begin(); i != views.end(); ++i) {
 820                 sel.push_back ((*i)->content ());
 821         }
 822
 823         return sel;
 824 }
 825
 826 void
 827 Timeline::set_selection (ContentList selection)
 828 {
 829         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 830                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 831                 if (cv) {
 832                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 833                 }
 834         }
 835 }
 836
 837 int
 838 Timeline::tracks_y_offset () const
 839 {
 840         return _reels_view->bbox().height + 4;
 841 }
 842
 843 int
 844 Timeline::width () const
 845 {
 846         return _main_canvas->GetVirtualSize().GetWidth();
 847 }
 848
 849 void
 850 Timeline::scrolled (wxScrollWinEvent& ev)
 851 {
 852         if (ev.GetOrientation() == wxVERTICAL) {
 853                 int x, y;
 854                 _main_canvas->GetViewStart (&x, &y);
 855                 _labels_canvas->Scroll (0, y);
 856         }
 857         ev.Skip ();
 858 }
 859
 860 void
 861 Timeline::tool_clicked (Tool t)
 862 {
 863         switch (t) {
 864         case ZOOM:
 865         case SELECT:
 866                 _tool = t;
 867                 break;
 868         case ZOOM_ALL:
 869                 zoom_all ();
 870                 break;
 871         case SNAP:
 872         case SEQUENCE:
 873                 break;
 874         }
 875 }
 876
 877 void
 878 Timeline::zoom_all ()
 879 {
 880         shared_ptr<Film> film = _film.lock ();
 881         DCPOMATIC_ASSERT (film);
 882         set_pixels_per_second ((_main_canvas->GetSize().GetWidth() - 32) / film->length().seconds());
 883         set_pixels_per_track ((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / _tracks);
 884         setup_scrollbars ();
 885         _main_canvas->Scroll (0, 0);
 886         _labels_canvas->Scroll (0, 0);
 887         Refresh ();
 888 }