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