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 "film_viewer.h"
  33 #include "lib/film.h"
  34 #include "lib/playlist.h"
  35 #include "lib/image_content.h"
  36 #include "lib/timer.h"
  37 #include "lib/audio_content.h"
  38 #include "lib/text_content.h"
  39 #include "lib/video_content.h"
  40 #include "lib/atmos_mxf_content.h"
  41 #include <wx/graphics.h>
  42 #include <boost/weak_ptr.hpp>
  43 #include <boost/foreach.hpp>
  44 #include <list>
  45 #include <iterator>
  46 #include <iostream>
  47
  48 using std::list;
  49 using std::cout;
  50 using std::min;
  51 using std::max;
  52 using std::abs;
  53 using boost::shared_ptr;
  54 using boost::weak_ptr;
  55 using boost::dynamic_pointer_cast;
  56 using boost::bind;
  57 using boost::optional;
  58 using namespace dcpomatic;
  59
  60 /* 3 hours in 640 pixels */
  61 double const Timeline::_minimum_pixels_per_second = 640.0 / (60 * 60 * 3);
  62 int const Timeline::_minimum_pixels_per_track = 16;
  63
  64 Timeline::Timeline (wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film, weak_ptr<FilmViewer> viewer)
  65         : wxPanel (parent, wxID_ANY)
  66         , _labels_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  67         , _main_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  68         , _content_panel (cp)
  69         , _film (film)
  70         , _viewer (viewer)
  71         , _time_axis_view (new TimelineTimeAxisView (*this, 64))
  72         , _reels_view (new TimelineReelsView (*this, 32))
  73         , _labels_view (new TimelineLabelsView (*this))
  74         , _tracks (0)
  75         , _left_down (false)
  76         , _down_view_position (0)
  77         , _first_move (false)
  78         , _menu (this)
  79         , _snap (true)
  80         , _tool (SELECT)
  81         , _x_scroll_rate (16)
  82         , _y_scroll_rate (16)
  83         , _pixels_per_track (48)
  84         , _first_resize (true)
  85         , _timer (this)
  86 {
  87 #ifndef __WXOSX__
  88         _labels_canvas->SetDoubleBuffered (true);
  89         _main_canvas->SetDoubleBuffered (true);
  90 #endif
  91
  92         wxSizer* sizer = new wxBoxSizer (wxHORIZONTAL);
  93         sizer->Add (_labels_canvas, 0, wxEXPAND);
  94         _labels_canvas->SetMinSize (wxSize (_labels_view->bbox().width, -1));
  95         sizer->Add (_main_canvas, 1, wxEXPAND);
  96         SetSizer (sizer);
  97
  98         _labels_canvas->Bind (wxEVT_PAINT,      boost::bind (&Timeline::paint_labels, this));
  99         _main_canvas->Bind   (wxEVT_PAINT,      boost::bind (&Timeline::paint_main,   this));
 100         _main_canvas->Bind   (wxEVT_LEFT_DOWN,  boost::bind (&Timeline::left_down,    this, _1));
 101         _main_canvas->Bind   (wxEVT_LEFT_UP,    boost::bind (&Timeline::left_up,      this, _1));
 102         _main_canvas->Bind   (wxEVT_RIGHT_DOWN, boost::bind (&Timeline::right_down,   this, _1));
 103         _main_canvas->Bind   (wxEVT_MOTION,     boost::bind (&Timeline::mouse_moved,  this, _1));
 104         _main_canvas->Bind   (wxEVT_SIZE,       boost::bind (&Timeline::resized,      this));
 105         _main_canvas->Bind   (wxEVT_SCROLLWIN_TOP,        boost::bind (&Timeline::scrolled,     this, _1));
 106         _main_canvas->Bind   (wxEVT_SCROLLWIN_BOTTOM,     boost::bind (&Timeline::scrolled,     this, _1));
 107         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 108         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 109         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 110         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 111         _main_canvas->Bind   (wxEVT_SCROLLWIN_THUMBTRACK, boost::bind (&Timeline::scrolled,     this, _1));
 112
 113         film_change (CHANGE_TYPE_DONE, Film::CONTENT);
 114
 115         SetMinSize (wxSize (640, 4 * pixels_per_track() + 96));
 116
 117         _film_changed_connection = film->Change.connect (bind (&Timeline::film_change, this, _1, _2));
 118         _film_content_change_connection = film->ContentChange.connect (bind (&Timeline::film_content_change, this, _1, _3, _4));
 119
 120         Bind (wxEVT_TIMER, boost::bind(&Timeline::update_playhead, this));
 121         _timer.Start (200, wxTIMER_CONTINUOUS);
 122
 123         setup_scrollbars ();
 124         _labels_canvas->ShowScrollbars (wxSHOW_SB_NEVER, wxSHOW_SB_NEVER);
 125 }
 126
 127 void
 128 Timeline::update_playhead ()
 129 {
 130         Refresh ();
 131 }
 132
 133 void
 134 Timeline::set_pixels_per_second (double pps)
 135 {
 136         _pixels_per_second = max (_minimum_pixels_per_second, pps);
 137 }
 138
 139 void
 140 Timeline::paint_labels ()
 141 {
 142         wxPaintDC dc (_labels_canvas);
 143
 144         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 145         if (!gc) {
 146                 return;
 147         }
 148
 149         int vsx, vsy;
 150         _labels_canvas->GetViewStart (&vsx, &vsy);
 151         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate + tracks_y_offset());
 152
 153         _labels_view->paint (gc, list<dcpomatic::Rect<int> >());
 154
 155         delete gc;
 156 }
 157
 158 void
 159 Timeline::paint_main ()
 160 {
 161         wxPaintDC dc (_main_canvas);
 162         _main_canvas->DoPrepareDC (dc);
 163
 164         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 165         if (!gc) {
 166                 return;
 167         }
 168
 169         int vsx, vsy;
 170         _main_canvas->GetViewStart (&vsx, &vsy);
 171         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate);
 172
 173         gc->SetAntialiasMode (wxANTIALIAS_DEFAULT);
 174
 175         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 176
 177                 shared_ptr<TimelineContentView> ic = dynamic_pointer_cast<TimelineContentView> (i);
 178
 179                 /* Find areas of overlap with other content views, so that we can plot them */
 180                 list<dcpomatic::Rect<int> > overlaps;
 181                 BOOST_FOREACH (shared_ptr<TimelineView> j, _views) {
 182                         shared_ptr<TimelineContentView> jc = dynamic_pointer_cast<TimelineContentView> (j);
 183                         /* No overlap with non-content views, views no different tracks, audio views or non-active views */
 184                         if (!ic || !jc || i == j || ic->track() != jc->track() || ic->track().get_value_or(2) >= 2 || !ic->active() || !jc->active()) {
 185                                 continue;
 186                         }
 187
 188                         optional<dcpomatic::Rect<int> > r = j->bbox().intersection (i->bbox());
 189                         if (r) {
 190                                 overlaps.push_back (r.get ());
 191                         }
 192                 }
 193
 194                 i->paint (gc, overlaps);
 195         }
 196
 197         if (_zoom_point) {
 198                 /* Translate back as _down_point and _zoom_point do not take scroll into account */
 199                 gc->Translate (vsx * _x_scroll_rate, vsy * _y_scroll_rate);
 200                 gc->SetPen (*wxBLACK_PEN);
 201                 gc->SetBrush (*wxTRANSPARENT_BRUSH);
 202                 gc->DrawRectangle (
 203                         min (_down_point.x, _zoom_point->x),
 204                         min (_down_point.y, _zoom_point->y),
 205                         abs (_down_point.x - _zoom_point->x),
 206                         abs (_down_point.y - _zoom_point->y)
 207                         );
 208         }
 209
 210         /* Playhead */
 211
 212         shared_ptr<FilmViewer> vp = _viewer.lock ();
 213         DCPOMATIC_ASSERT (vp);
 214
 215         gc->SetPen (*wxRED_PEN);
 216         wxGraphicsPath path = gc->CreatePath ();
 217         double const ph = vp->position().seconds() * pixels_per_second().get_value_or(0);
 218         path.MoveToPoint (ph, 0);
 219         path.AddLineToPoint (ph, pixels_per_track() * _tracks + 32);
 220         gc->StrokePath (path);
 221
 222         delete gc;
 223 }
 224
 225 void
 226 Timeline::film_change (ChangeType type, Film::Property p)
 227 {
 228         if (type != CHANGE_TYPE_DONE) {
 229                 return;
 230         }
 231
 232         if (p == Film::CONTENT || p == Film::REEL_TYPE || p == Film::REEL_LENGTH) {
 233                 ensure_ui_thread ();
 234                 recreate_views ();
 235         } else if (p == Film::CONTENT_ORDER) {
 236                 Refresh ();
 237         }
 238 }
 239
 240 void
 241 Timeline::recreate_views ()
 242 {
 243         shared_ptr<const Film> film = _film.lock ();
 244         if (!film) {
 245                 return;
 246         }
 247
 248         _views.clear ();
 249         _views.push_back (_time_axis_view);
 250         _views.push_back (_reels_view);
 251
 252         BOOST_FOREACH (shared_ptr<Content> i, film->content ()) {
 253                 if (i->video) {
 254                         _views.push_back (shared_ptr<TimelineView> (new TimelineVideoContentView (*this, i)));
 255                 }
 256
 257                 if (i->audio && !i->audio->mapping().mapped_output_channels().empty ()) {
 258                         _views.push_back (shared_ptr<TimelineView> (new TimelineAudioContentView (*this, i)));
 259                 }
 260
 261                 BOOST_FOREACH (shared_ptr<TextContent> j, i->text) {
 262                         _views.push_back (shared_ptr<TimelineView> (new TimelineTextContentView (*this, i, j)));
 263                 }
 264
 265                 if (dynamic_pointer_cast<AtmosMXFContent> (i)) {
 266                         _views.push_back (shared_ptr<TimelineView> (new TimelineAtmosContentView (*this, i)));
 267                 }
 268         }
 269
 270         assign_tracks ();
 271         setup_scrollbars ();
 272         Refresh ();
 273 }
 274
 275 void
 276 Timeline::film_content_change (ChangeType type, int property, bool frequent)
 277 {
 278         if (type != CHANGE_TYPE_DONE) {
 279                 return;
 280         }
 281
 282         ensure_ui_thread ();
 283
 284         if (property == AudioContentProperty::STREAMS || property == VideoContentProperty::FRAME_TYPE) {
 285                 recreate_views ();
 286         } else if (property == ContentProperty::POSITION || property == ContentProperty::LENGTH) {
 287                 _reels_view->force_redraw ();
 288         } else if (!frequent) {
 289                 setup_scrollbars ();
 290                 Refresh ();
 291         }
 292 }
 293
 294 template <class T>
 295 int
 296 place (shared_ptr<const Film> film, TimelineViewList& views, int& tracks)
 297 {
 298         int const base = tracks;
 299
 300         BOOST_FOREACH (shared_ptr<TimelineView> i, views) {
 301                 if (!dynamic_pointer_cast<T>(i)) {
 302                         continue;
 303                 }
 304
 305                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (i);
 306
 307                 int t = base;
 308
 309                 shared_ptr<Content> content = cv->content();
 310                 DCPTimePeriod const content_period (content->position(), content->end(film));
 311
 312                 while (true) {
 313                         TimelineViewList::iterator j = views.begin();
 314                         while (j != views.end()) {
 315                                 shared_ptr<T> test = dynamic_pointer_cast<T> (*j);
 316                                 if (!test) {
 317                                         ++j;
 318                                         continue;
 319                                 }
 320
 321                                 shared_ptr<Content> test_content = test->content();
 322                                 if (
 323                                         test->track() && test->track().get() == t &&
 324                                         content_period.overlap(DCPTimePeriod(test_content->position(), test_content->end(film)))) {
 325                                         /* we have an overlap on track `t' */
 326                                         ++t;
 327                                         break;
 328                                 }
 329
 330                                 ++j;
 331                         }
 332
 333                         if (j == views.end ()) {
 334                                 /* no overlap on `t' */
 335                                 break;
 336                         }
 337                 }
 338
 339                 cv->set_track (t);
 340                 tracks = max (tracks, t + 1);
 341         }
 342
 343         return tracks - base;
 344 }
 345
 346 /** Compare the mapped output channels of two TimelineViews, so we can into
 347  *  order of first mapped DCP channel.
 348  */
 349 struct AudioMappingComparator {
 350         bool operator()(shared_ptr<TimelineView> a, shared_ptr<TimelineView> b) {
 351                 int la = -1;
 352                 shared_ptr<TimelineAudioContentView> cva = dynamic_pointer_cast<TimelineAudioContentView>(a);
 353                 if (cva) {
 354                         list<int> oc = cva->content()->audio->mapping().mapped_output_channels();
 355                         la = *min_element(boost::begin(oc), boost::end(oc));
 356                 }
 357                 int lb = -1;
 358                 shared_ptr<TimelineAudioContentView> cvb = dynamic_pointer_cast<TimelineAudioContentView>(b);
 359                 if (cvb) {
 360                         list<int> oc = cvb->content()->audio->mapping().mapped_output_channels();
 361                         lb = *min_element(boost::begin(oc), boost::end(oc));
 362                 }
 363                 return la < lb;
 364         }
 365 };
 366
 367 void
 368 Timeline::assign_tracks ()
 369 {
 370         /* Tracks are:
 371            Video (mono or left-eye)
 372            Video (right-eye)
 373            Text 1
 374            Text 2
 375            Text N
 376            Atmos
 377            Audio 1
 378            Audio 2
 379            Audio N
 380         */
 381
 382         shared_ptr<const Film> film = _film.lock ();
 383         DCPOMATIC_ASSERT (film);
 384
 385         _tracks = 0;
 386
 387         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 388                 shared_ptr<TimelineContentView> c = dynamic_pointer_cast<TimelineContentView> (*i);
 389                 if (c) {
 390                         c->unset_track ();
 391                 }
 392         }
 393
 394         /* Video */
 395
 396         bool have_3d = 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
 403                 /* Video on tracks 0 and maybe 1 (left and right eye) */
 404                 if (cv->content()->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
 405                         cv->set_track (1);
 406                         _tracks = max (_tracks, 2);
 407                         have_3d = true;
 408                 } else {
 409                         cv->set_track (0);
 410                 }
 411         }
 412
 413         _tracks = max (_tracks, 1);
 414
 415         /* Texts */
 416
 417         int const text_tracks = place<TimelineTextContentView> (film, _views, _tracks);
 418
 419         /* Atmos */
 420
 421         bool have_atmos = false;
 422         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 423                 shared_ptr<TimelineAtmosContentView> cv = dynamic_pointer_cast<TimelineAtmosContentView>(i);
 424                 if (cv) {
 425                         cv->set_track (_tracks);
 426                         have_atmos = true;
 427                 }
 428         }
 429
 430         if (have_atmos) {
 431                 ++_tracks;
 432         }
 433
 434         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 435            DCP channel index.
 436         */
 437
 438         TimelineViewList views = _views;
 439         sort(views.begin(), views.end(), AudioMappingComparator());
 440         int const audio_tracks = place<TimelineAudioContentView> (film, views, _tracks);
 441
 442         _labels_view->set_3d (have_3d);
 443         _labels_view->set_audio_tracks (audio_tracks);
 444         _labels_view->set_text_tracks (text_tracks);
 445         _labels_view->set_atmos (have_atmos);
 446
 447         _time_axis_view->set_y (tracks());
 448         _reels_view->set_y (8);
 449 }
 450
 451 int
 452 Timeline::tracks () const
 453 {
 454         return _tracks;
 455 }
 456
 457 void
 458 Timeline::setup_scrollbars ()
 459 {
 460         shared_ptr<const Film> film = _film.lock ();
 461         if (!film || !_pixels_per_second) {
 462                 return;
 463         }
 464
 465         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 466
 467         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 468         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 469         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 470         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 471 }
 472
 473 shared_ptr<TimelineView>
 474 Timeline::event_to_view (wxMouseEvent& ev)
 475 {
 476         /* Search backwards through views so that we find the uppermost one first */
 477         TimelineViewList::reverse_iterator i = _views.rbegin();
 478
 479         int vsx, vsy;
 480         _main_canvas->GetViewStart (&vsx, &vsy);
 481         Position<int> const p (ev.GetX() + vsx * _x_scroll_rate, ev.GetY() + vsy * _y_scroll_rate);
 482
 483         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 484                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 485                 ++i;
 486         }
 487
 488         if (i == _views.rend ()) {
 489                 return shared_ptr<TimelineView> ();
 490         }
 491
 492         return *i;
 493 }
 494
 495 void
 496 Timeline::left_down (wxMouseEvent& ev)
 497 {
 498         _left_down = true;
 499         _down_point = ev.GetPosition ();
 500
 501         switch (_tool) {
 502         case SELECT:
 503                 left_down_select (ev);
 504                 break;
 505         case ZOOM:
 506         case ZOOM_ALL:
 507         case SNAP:
 508         case SEQUENCE:
 509                 /* Nothing to do */
 510                 break;
 511         }
 512 }
 513
 514 void
 515 Timeline::left_down_select (wxMouseEvent& ev)
 516 {
 517         shared_ptr<TimelineView> view = event_to_view (ev);
 518         shared_ptr<TimelineContentView> content_view = dynamic_pointer_cast<TimelineContentView> (view);
 519
 520         _down_view.reset ();
 521
 522         if (content_view) {
 523                 _down_view = content_view;
 524                 _down_view_position = content_view->content()->position ();
 525         }
 526
 527         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 528                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 529                 if (!cv) {
 530                         continue;
 531                 }
 532
 533                 if (!ev.ShiftDown ()) {
 534                         cv->set_selected (view == *i);
 535                 }
 536         }
 537
 538         if (content_view && ev.ShiftDown ()) {
 539                 content_view->set_selected (!content_view->selected ());
 540         }
 541
 542         _first_move = false;
 543
 544         if (_down_view) {
 545                 /* Pre-compute the points that we might snap to */
 546                 for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 547                         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 548                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 549                                 continue;
 550                         }
 551
 552                         shared_ptr<Film> film = _film.lock ();
 553                         DCPOMATIC_ASSERT (film);
 554
 555                         _start_snaps.push_back (cv->content()->position());
 556                         _end_snaps.push_back (cv->content()->position());
 557                         _start_snaps.push_back (cv->content()->end(film));
 558                         _end_snaps.push_back (cv->content()->end(film));
 559
 560                         BOOST_FOREACH (DCPTime i, cv->content()->reel_split_points(film)) {
 561                                 _start_snaps.push_back (i);
 562                         }
 563                 }
 564
 565                 /* Tell everyone that things might change frequently during the drag */
 566                 _down_view->content()->set_change_signals_frequent (true);
 567         }
 568 }
 569
 570 void
 571 Timeline::left_up (wxMouseEvent& ev)
 572 {
 573         _left_down = false;
 574
 575         switch (_tool) {
 576         case SELECT:
 577                 left_up_select (ev);
 578                 break;
 579         case ZOOM:
 580                 left_up_zoom (ev);
 581                 break;
 582         case ZOOM_ALL:
 583         case SNAP:
 584         case SEQUENCE:
 585                 break;
 586         }
 587 }
 588
 589 void
 590 Timeline::left_up_select (wxMouseEvent& ev)
 591 {
 592         if (_down_view) {
 593                 _down_view->content()->set_change_signals_frequent (false);
 594         }
 595
 596         _content_panel->set_selection (selected_content ());
 597         /* Since we may have just set change signals back to `not-frequent', we have to
 598            make sure this position change is signalled, even if the position value has
 599            not changed since the last time it was set (with frequent=true).  This is
 600            a bit of a hack.
 601         */
 602         set_position_from_event (ev, true);
 603
 604         /* Clear up up the stuff we don't do during drag */
 605         assign_tracks ();
 606         setup_scrollbars ();
 607         Refresh ();
 608
 609         _start_snaps.clear ();
 610         _end_snaps.clear ();
 611 }
 612
 613 void
 614 Timeline::left_up_zoom (wxMouseEvent& ev)
 615 {
 616         _zoom_point = ev.GetPosition ();
 617
 618         int vsx, vsy;
 619         _main_canvas->GetViewStart (&vsx, &vsy);
 620
 621         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 622         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 623
 624         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 625                 /* Very small zoom rectangle: we assume it wasn't intentional */
 626                 return;
 627         }
 628
 629         DCPTime const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 630         DCPTime const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 631         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 632
 633         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 634         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 635         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 636
 637         setup_scrollbars ();
 638         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 639         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 640         _labels_canvas->Scroll (0, y);
 641
 642         _zoom_point = optional<wxPoint> ();
 643         Refresh ();
 644 }
 645
 646 void
 647 Timeline::set_pixels_per_track (int h)
 648 {
 649         _pixels_per_track = max(_minimum_pixels_per_track, h);
 650 }
 651
 652 void
 653 Timeline::mouse_moved (wxMouseEvent& ev)
 654 {
 655         switch (_tool) {
 656         case SELECT:
 657                 mouse_moved_select (ev);
 658                 break;
 659         case ZOOM:
 660                 mouse_moved_zoom (ev);
 661                 break;
 662         case ZOOM_ALL:
 663         case SNAP:
 664         case SEQUENCE:
 665                 break;
 666         }
 667 }
 668
 669 void
 670 Timeline::mouse_moved_select (wxMouseEvent& ev)
 671 {
 672         if (!_left_down) {
 673                 return;
 674         }
 675
 676         set_position_from_event (ev);
 677 }
 678
 679 void
 680 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 681 {
 682         if (!_left_down) {
 683                 return;
 684         }
 685
 686         _zoom_point = ev.GetPosition ();
 687         Refresh ();
 688 }
 689
 690 void
 691 Timeline::right_down (wxMouseEvent& ev)
 692 {
 693         switch (_tool) {
 694         case SELECT:
 695                 right_down_select (ev);
 696                 break;
 697         case ZOOM:
 698                 /* Zoom out */
 699                 set_pixels_per_second (*_pixels_per_second / 2);
 700                 set_pixels_per_track (_pixels_per_track / 2);
 701                 setup_scrollbars ();
 702                 Refresh ();
 703                 break;
 704         case ZOOM_ALL:
 705         case SNAP:
 706         case SEQUENCE:
 707                 break;
 708         }
 709 }
 710
 711 void
 712 Timeline::right_down_select (wxMouseEvent& ev)
 713 {
 714         shared_ptr<TimelineView> view = event_to_view (ev);
 715         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (view);
 716         if (!cv) {
 717                 return;
 718         }
 719
 720         if (!cv->selected ()) {
 721                 clear_selection ();
 722                 cv->set_selected (true);
 723         }
 724
 725         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 726 }
 727
 728 void
 729 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 730 {
 731         DCPTime const d = a - b;
 732         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 733                 nearest_distance = d;
 734         }
 735 }
 736
 737 void
 738 Timeline::set_position_from_event (wxMouseEvent& ev, bool force_emit)
 739 {
 740         if (!_pixels_per_second) {
 741                 return;
 742         }
 743
 744         double const pps = _pixels_per_second.get ();
 745
 746         wxPoint const p = ev.GetPosition();
 747
 748         if (!_first_move) {
 749                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 750                    before the drag is considered to have started.
 751                 */
 752                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 753                 if (dist < 8) {
 754                         return;
 755                 }
 756                 _first_move = true;
 757         }
 758
 759         if (!_down_view) {
 760                 return;
 761         }
 762
 763         DCPTime new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 764
 765         shared_ptr<Film> film = _film.lock ();
 766         DCPOMATIC_ASSERT (film);
 767
 768         if (_snap) {
 769                 DCPTime const new_end = new_position + _down_view->content()->length_after_trim(film);
 770                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 771                    positive is right).
 772                 */
 773                 optional<DCPTime> nearest_distance;
 774
 775                 /* Find the nearest snap point */
 776
 777                 BOOST_FOREACH (DCPTime i, _start_snaps) {
 778                         maybe_snap (i, new_position, nearest_distance);
 779                 }
 780
 781                 BOOST_FOREACH (DCPTime i, _end_snaps) {
 782                         maybe_snap (i, new_end, nearest_distance);
 783                 }
 784
 785                 if (nearest_distance) {
 786                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 787                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 788                                 new_position += nearest_distance.get ();
 789                         }
 790                 }
 791         }
 792
 793         if (new_position < DCPTime ()) {
 794                 new_position = DCPTime ();
 795         }
 796
 797         _down_view->content()->set_position (film, new_position, force_emit);
 798
 799         film->set_sequence (false);
 800 }
 801
 802 void
 803 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 804 {
 805         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 806 }
 807
 808 shared_ptr<const Film>
 809 Timeline::film () const
 810 {
 811         return _film.lock ();
 812 }
 813
 814 void
 815 Timeline::resized ()
 816 {
 817         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 818                 zoom_all ();
 819                 _first_resize = false;
 820         }
 821         setup_scrollbars ();
 822 }
 823
 824 void
 825 Timeline::clear_selection ()
 826 {
 827         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 828                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 829                 if (cv) {
 830                         cv->set_selected (false);
 831                 }
 832         }
 833 }
 834
 835 TimelineContentViewList
 836 Timeline::selected_views () const
 837 {
 838         TimelineContentViewList sel;
 839
 840         for (TimelineViewList::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 841                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 842                 if (cv && cv->selected()) {
 843                         sel.push_back (cv);
 844                 }
 845         }
 846
 847         return sel;
 848 }
 849
 850 ContentList
 851 Timeline::selected_content () const
 852 {
 853         ContentList sel;
 854         TimelineContentViewList views = selected_views ();
 855
 856         for (TimelineContentViewList::const_iterator i = views.begin(); i != views.end(); ++i) {
 857                 sel.push_back ((*i)->content ());
 858         }
 859
 860         return sel;
 861 }
 862
 863 void
 864 Timeline::set_selection (ContentList selection)
 865 {
 866         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 867                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 868                 if (cv) {
 869                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 870                 }
 871         }
 872 }
 873
 874 int
 875 Timeline::tracks_y_offset () const
 876 {
 877         return _reels_view->bbox().height + 4;
 878 }
 879
 880 int
 881 Timeline::width () const
 882 {
 883         return _main_canvas->GetVirtualSize().GetWidth();
 884 }
 885
 886 void
 887 Timeline::scrolled (wxScrollWinEvent& ev)
 888 {
 889         if (ev.GetOrientation() == wxVERTICAL) {
 890                 int x, y;
 891                 _main_canvas->GetViewStart (&x, &y);
 892                 _labels_canvas->Scroll (0, y);
 893         }
 894         ev.Skip ();
 895 }
 896
 897 void
 898 Timeline::tool_clicked (Tool t)
 899 {
 900         switch (t) {
 901         case ZOOM:
 902         case SELECT:
 903                 _tool = t;
 904                 break;
 905         case ZOOM_ALL:
 906                 zoom_all ();
 907                 break;
 908         case SNAP:
 909         case SEQUENCE:
 910                 break;
 911         }
 912 }
 913
 914 void
 915 Timeline::zoom_all ()
 916 {
 917         shared_ptr<Film> film = _film.lock ();
 918         DCPOMATIC_ASSERT (film);
 919         set_pixels_per_second ((_main_canvas->GetSize().GetWidth() - 32) / film->length().seconds());
 920         set_pixels_per_track ((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / _tracks);
 921         setup_scrollbars ();
 922         _main_canvas->Scroll (0, 0);
 923         _labels_canvas->Scroll (0, 0);
 924         Refresh ();
 925 }