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 (shared_ptr<const Film> film, 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(film));
 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(film)))) {
 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         shared_ptr<const Film> film = _film.lock ();
 358         DCPOMATIC_ASSERT (film);
 359
 360         _tracks = 0;
 361
 362         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 363                 shared_ptr<TimelineContentView> c = dynamic_pointer_cast<TimelineContentView> (*i);
 364                 if (c) {
 365                         c->unset_track ();
 366                 }
 367         }
 368
 369         /* Video */
 370
 371         bool have_3d = false;
 372         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 373                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 374                 if (!cv) {
 375                         continue;
 376                 }
 377
 378                 /* Video on tracks 0 and maybe 1 (left and right eye) */
 379                 if (cv->content()->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
 380                         cv->set_track (1);
 381                         _tracks = max (_tracks, 2);
 382                         have_3d = true;
 383                 } else {
 384                         cv->set_track (0);
 385                 }
 386         }
 387
 388         _tracks = max (_tracks, 1);
 389
 390         /* Texts */
 391
 392         int const text_tracks = place<TimelineTextContentView> (film, _views, _tracks);
 393
 394         /* Atmos */
 395
 396         bool have_atmos = false;
 397         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 398                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 399                 if (!cv) {
 400                         continue;
 401                 }
 402                 if (dynamic_pointer_cast<TimelineAtmosContentView> (i)) {
 403                         cv->set_track (_tracks - 1);
 404                         have_atmos = true;
 405                 }
 406         }
 407
 408         if (have_atmos) {
 409                 ++_tracks;
 410         }
 411
 412         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 413            DCP channel index.
 414         */
 415
 416         TimelineViewList views = _views;
 417         sort(views.begin(), views.end(), AudioMappingComparator());
 418         int const audio_tracks = place<TimelineAudioContentView> (film, views, _tracks);
 419
 420         _labels_view->set_3d (have_3d);
 421         _labels_view->set_audio_tracks (audio_tracks);
 422         _labels_view->set_text_tracks (text_tracks);
 423         _labels_view->set_atmos (have_atmos);
 424
 425         _time_axis_view->set_y (tracks());
 426         _reels_view->set_y (8);
 427 }
 428
 429 int
 430 Timeline::tracks () const
 431 {
 432         return _tracks;
 433 }
 434
 435 void
 436 Timeline::setup_scrollbars ()
 437 {
 438         shared_ptr<const Film> film = _film.lock ();
 439         if (!film || !_pixels_per_second) {
 440                 return;
 441         }
 442
 443         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 444
 445         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 446         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 447         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 448         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 449 }
 450
 451 shared_ptr<TimelineView>
 452 Timeline::event_to_view (wxMouseEvent& ev)
 453 {
 454         /* Search backwards through views so that we find the uppermost one first */
 455         TimelineViewList::reverse_iterator i = _views.rbegin();
 456         Position<int> const p (ev.GetX(), ev.GetY());
 457         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 458                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 459                 ++i;
 460         }
 461
 462         if (i == _views.rend ()) {
 463                 return shared_ptr<TimelineView> ();
 464         }
 465
 466         return *i;
 467 }
 468
 469 void
 470 Timeline::left_down (wxMouseEvent& ev)
 471 {
 472         _left_down = true;
 473         _down_point = ev.GetPosition ();
 474
 475         switch (_tool) {
 476         case SELECT:
 477                 left_down_select (ev);
 478                 break;
 479         case ZOOM:
 480         case ZOOM_ALL:
 481         case SNAP:
 482         case SEQUENCE:
 483                 /* Nothing to do */
 484                 break;
 485         }
 486 }
 487
 488 void
 489 Timeline::left_down_select (wxMouseEvent& ev)
 490 {
 491         shared_ptr<TimelineView> view = event_to_view (ev);
 492         shared_ptr<TimelineContentView> content_view = dynamic_pointer_cast<TimelineContentView> (view);
 493
 494         _down_view.reset ();
 495
 496         if (content_view) {
 497                 _down_view = content_view;
 498                 _down_view_position = content_view->content()->position ();
 499         }
 500
 501         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 502                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 503                 if (!cv) {
 504                         continue;
 505                 }
 506
 507                 if (!ev.ShiftDown ()) {
 508                         cv->set_selected (view == *i);
 509                 }
 510         }
 511
 512         if (content_view && ev.ShiftDown ()) {
 513                 content_view->set_selected (!content_view->selected ());
 514         }
 515
 516         _first_move = false;
 517
 518         if (_down_view) {
 519                 /* Pre-compute the points that we might snap to */
 520                 for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 521                         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 522                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 523                                 continue;
 524                         }
 525
 526                         shared_ptr<Film> film = _film.lock ();
 527                         DCPOMATIC_ASSERT (film);
 528
 529                         _start_snaps.push_back (cv->content()->position());
 530                         _end_snaps.push_back (cv->content()->position());
 531                         _start_snaps.push_back (cv->content()->end(film));
 532                         _end_snaps.push_back (cv->content()->end(film));
 533
 534                         BOOST_FOREACH (DCPTime i, cv->content()->reel_split_points()) {
 535                                 _start_snaps.push_back (i);
 536                         }
 537                 }
 538
 539                 /* Tell everyone that things might change frequently during the drag */
 540                 _down_view->content()->set_change_signals_frequent (true);
 541         }
 542 }
 543
 544 void
 545 Timeline::left_up (wxMouseEvent& ev)
 546 {
 547         _left_down = false;
 548
 549         switch (_tool) {
 550         case SELECT:
 551                 left_up_select (ev);
 552                 break;
 553         case ZOOM:
 554                 left_up_zoom (ev);
 555                 break;
 556         case ZOOM_ALL:
 557         case SNAP:
 558         case SEQUENCE:
 559                 break;
 560         }
 561 }
 562
 563 void
 564 Timeline::left_up_select (wxMouseEvent& ev)
 565 {
 566         if (_down_view) {
 567                 _down_view->content()->set_change_signals_frequent (false);
 568         }
 569
 570         _content_panel->set_selection (selected_content ());
 571         set_position_from_event (ev);
 572
 573         /* Clear up up the stuff we don't do during drag */
 574         assign_tracks ();
 575         setup_scrollbars ();
 576         Refresh ();
 577
 578         _start_snaps.clear ();
 579         _end_snaps.clear ();
 580 }
 581
 582 void
 583 Timeline::left_up_zoom (wxMouseEvent& ev)
 584 {
 585         _zoom_point = ev.GetPosition ();
 586
 587         int vsx, vsy;
 588         _main_canvas->GetViewStart (&vsx, &vsy);
 589
 590         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 591         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 592
 593         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 594                 /* Very small zoom rectangle: we assume it wasn't intentional */
 595                 return;
 596         }
 597
 598         DCPTime const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 599         DCPTime const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 600         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 601
 602         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 603         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 604         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 605
 606         setup_scrollbars ();
 607         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 608         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 609         _labels_canvas->Scroll (0, y);
 610
 611         _zoom_point = optional<wxPoint> ();
 612         Refresh ();
 613 }
 614
 615 void
 616 Timeline::set_pixels_per_track (int h)
 617 {
 618         _pixels_per_track = max(_minimum_pixels_per_track, h);
 619 }
 620
 621 void
 622 Timeline::mouse_moved (wxMouseEvent& ev)
 623 {
 624         switch (_tool) {
 625         case SELECT:
 626                 mouse_moved_select (ev);
 627                 break;
 628         case ZOOM:
 629                 mouse_moved_zoom (ev);
 630                 break;
 631         case ZOOM_ALL:
 632         case SNAP:
 633         case SEQUENCE:
 634                 break;
 635         }
 636 }
 637
 638 void
 639 Timeline::mouse_moved_select (wxMouseEvent& ev)
 640 {
 641         if (!_left_down) {
 642                 return;
 643         }
 644
 645         set_position_from_event (ev);
 646 }
 647
 648 void
 649 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 650 {
 651         if (!_left_down) {
 652                 return;
 653         }
 654
 655         _zoom_point = ev.GetPosition ();
 656         Refresh ();
 657 }
 658
 659 void
 660 Timeline::right_down (wxMouseEvent& ev)
 661 {
 662         switch (_tool) {
 663         case SELECT:
 664                 right_down_select (ev);
 665                 break;
 666         case ZOOM:
 667                 /* Zoom out */
 668                 set_pixels_per_second (*_pixels_per_second / 2);
 669                 set_pixels_per_track (_pixels_per_track / 2);
 670                 setup_scrollbars ();
 671                 Refresh ();
 672                 break;
 673         case ZOOM_ALL:
 674         case SNAP:
 675         case SEQUENCE:
 676                 break;
 677         }
 678 }
 679
 680 void
 681 Timeline::right_down_select (wxMouseEvent& ev)
 682 {
 683         shared_ptr<TimelineView> view = event_to_view (ev);
 684         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (view);
 685         if (!cv) {
 686                 return;
 687         }
 688
 689         if (!cv->selected ()) {
 690                 clear_selection ();
 691                 cv->set_selected (true);
 692         }
 693
 694         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 695 }
 696
 697 void
 698 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 699 {
 700         DCPTime const d = a - b;
 701         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 702                 nearest_distance = d;
 703         }
 704 }
 705
 706 void
 707 Timeline::set_position_from_event (wxMouseEvent& ev)
 708 {
 709         if (!_pixels_per_second) {
 710                 return;
 711         }
 712
 713         double const pps = _pixels_per_second.get ();
 714
 715         wxPoint const p = ev.GetPosition();
 716
 717         if (!_first_move) {
 718                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 719                    before the drag is considered to have started.
 720                 */
 721                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 722                 if (dist < 8) {
 723                         return;
 724                 }
 725                 _first_move = true;
 726         }
 727
 728         if (!_down_view) {
 729                 return;
 730         }
 731
 732         DCPTime new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 733
 734         shared_ptr<Film> film = _film.lock ();
 735         DCPOMATIC_ASSERT (film);
 736
 737         if (_snap) {
 738                 DCPTime const new_end = new_position + _down_view->content()->length_after_trim(film);
 739                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 740                    positive is right).
 741                 */
 742                 optional<DCPTime> nearest_distance;
 743
 744                 /* Find the nearest snap point */
 745
 746                 BOOST_FOREACH (DCPTime i, _start_snaps) {
 747                         maybe_snap (i, new_position, nearest_distance);
 748                 }
 749
 750                 BOOST_FOREACH (DCPTime i, _end_snaps) {
 751                         maybe_snap (i, new_end, nearest_distance);
 752                 }
 753
 754                 if (nearest_distance) {
 755                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 756                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 757                                 new_position += nearest_distance.get ();
 758                         }
 759                 }
 760         }
 761
 762         if (new_position < DCPTime ()) {
 763                 new_position = DCPTime ();
 764         }
 765
 766         _down_view->content()->set_position (film, new_position);
 767
 768         film->set_sequence (false);
 769 }
 770
 771 void
 772 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 773 {
 774         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 775 }
 776
 777 shared_ptr<const Film>
 778 Timeline::film () const
 779 {
 780         return _film.lock ();
 781 }
 782
 783 void
 784 Timeline::resized ()
 785 {
 786         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 787                 zoom_all ();
 788                 _first_resize = false;
 789         }
 790         setup_scrollbars ();
 791 }
 792
 793 void
 794 Timeline::clear_selection ()
 795 {
 796         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 797                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 798                 if (cv) {
 799                         cv->set_selected (false);
 800                 }
 801         }
 802 }
 803
 804 TimelineContentViewList
 805 Timeline::selected_views () const
 806 {
 807         TimelineContentViewList sel;
 808
 809         for (TimelineViewList::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 810                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 811                 if (cv && cv->selected()) {
 812                         sel.push_back (cv);
 813                 }
 814         }
 815
 816         return sel;
 817 }
 818
 819 ContentList
 820 Timeline::selected_content () const
 821 {
 822         ContentList sel;
 823         TimelineContentViewList views = selected_views ();
 824
 825         for (TimelineContentViewList::const_iterator i = views.begin(); i != views.end(); ++i) {
 826                 sel.push_back ((*i)->content ());
 827         }
 828
 829         return sel;
 830 }
 831
 832 void
 833 Timeline::set_selection (ContentList selection)
 834 {
 835         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 836                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 837                 if (cv) {
 838                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 839                 }
 840         }
 841 }
 842
 843 int
 844 Timeline::tracks_y_offset () const
 845 {
 846         return _reels_view->bbox().height + 4;
 847 }
 848
 849 int
 850 Timeline::width () const
 851 {
 852         return _main_canvas->GetVirtualSize().GetWidth();
 853 }
 854
 855 void
 856 Timeline::scrolled (wxScrollWinEvent& ev)
 857 {
 858         if (ev.GetOrientation() == wxVERTICAL) {
 859                 int x, y;
 860                 _main_canvas->GetViewStart (&x, &y);
 861                 _labels_canvas->Scroll (0, y);
 862         }
 863         ev.Skip ();
 864 }
 865
 866 void
 867 Timeline::tool_clicked (Tool t)
 868 {
 869         switch (t) {
 870         case ZOOM:
 871         case SELECT:
 872                 _tool = t;
 873                 break;
 874         case ZOOM_ALL:
 875                 zoom_all ();
 876                 break;
 877         case SNAP:
 878         case SEQUENCE:
 879                 break;
 880         }
 881 }
 882
 883 void
 884 Timeline::zoom_all ()
 885 {
 886         shared_ptr<Film> film = _film.lock ();
 887         DCPOMATIC_ASSERT (film);
 888         set_pixels_per_second ((_main_canvas->GetSize().GetWidth() - 32) / film->length().seconds());
 889         set_pixels_per_track ((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / _tracks);
 890         setup_scrollbars ();
 891         _main_canvas->Scroll (0, 0);
 892         _labels_canvas->Scroll (0, 0);
 893         Refresh ();
 894 }