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