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