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 void
 310 Timeline::assign_tracks ()
 311 {
 312         /* Tracks are:
 313            Video (mono or left-eye)
 314            Video (right-eye)
 315            Subtitle 1
 316            Subtitle 2
 317            Subtitle N
 318            Atmos
 319            Audio 1
 320            Audio 2
 321            Audio N
 322         */
 323
 324         _tracks = 0;
 325
 326         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 327                 shared_ptr<TimelineContentView> c = dynamic_pointer_cast<TimelineContentView> (*i);
 328                 if (c) {
 329                         c->unset_track ();
 330                 }
 331         }
 332
 333         /* Video */
 334
 335         bool have_3d = false;
 336         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 337                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 338                 if (!cv) {
 339                         continue;
 340                 }
 341
 342                 /* Video on tracks 0 and maybe 1 (left and right eye) */
 343                 if (cv->content()->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
 344                         cv->set_track (1);
 345                         _tracks = max (_tracks, 2);
 346                         have_3d = true;
 347                 } else {
 348                         cv->set_track (0);
 349                 }
 350         }
 351
 352         _tracks = max (_tracks, 1);
 353
 354         /* Subtitle */
 355
 356         int const subtitle_tracks = place<TimelineSubtitleContentView> (_views, _tracks);
 357
 358         /* Atmos */
 359
 360         bool have_atmos = false;
 361         BOOST_FOREACH (shared_ptr<TimelineView> i, _views) {
 362                 shared_ptr<TimelineVideoContentView> cv = dynamic_pointer_cast<TimelineVideoContentView> (i);
 363                 if (!cv) {
 364                         continue;
 365                 }
 366                 if (dynamic_pointer_cast<TimelineAtmosContentView> (i)) {
 367                         cv->set_track (_tracks - 1);
 368                         have_atmos = true;
 369                 }
 370         }
 371
 372         if (have_atmos) {
 373                 ++_tracks;
 374         }
 375
 376         /* Audio */
 377
 378         place<TimelineAudioContentView> (_views, _tracks);
 379
 380         _labels_view->set_3d (have_3d);
 381         _labels_view->set_subtitle_tracks (subtitle_tracks);
 382         _labels_view->set_atmos (have_atmos);
 383
 384         _time_axis_view->set_y (tracks());
 385         _reels_view->set_y (8);
 386 }
 387
 388 int
 389 Timeline::tracks () const
 390 {
 391         return _tracks;
 392 }
 393
 394 void
 395 Timeline::setup_scrollbars ()
 396 {
 397         shared_ptr<const Film> film = _film.lock ();
 398         if (!film || !_pixels_per_second) {
 399                 return;
 400         }
 401         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, tracks() * pixels_per_track() + 96);
 402         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 403         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height);
 404         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 405 }
 406
 407 shared_ptr<TimelineView>
 408 Timeline::event_to_view (wxMouseEvent& ev)
 409 {
 410         /* Search backwards through views so that we find the uppermost one first */
 411         TimelineViewList::reverse_iterator i = _views.rbegin();
 412         Position<int> const p (ev.GetX(), ev.GetY());
 413         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 414                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 415                 ++i;
 416         }
 417
 418         if (i == _views.rend ()) {
 419                 return shared_ptr<TimelineView> ();
 420         }
 421
 422         return *i;
 423 }
 424
 425 void
 426 Timeline::left_down (wxMouseEvent& ev)
 427 {
 428         _left_down = true;
 429         _down_point = ev.GetPosition ();
 430
 431         switch (_tool) {
 432         case SELECT:
 433                 left_down_select (ev);
 434                 break;
 435         case ZOOM:
 436         case ZOOM_ALL:
 437         case SNAP:
 438         case SEQUENCE:
 439                 /* Nothing to do */
 440                 break;
 441         }
 442 }
 443
 444 void
 445 Timeline::left_down_select (wxMouseEvent& ev)
 446 {
 447         shared_ptr<TimelineView> view = event_to_view (ev);
 448         shared_ptr<TimelineContentView> content_view = dynamic_pointer_cast<TimelineContentView> (view);
 449
 450         _down_view.reset ();
 451
 452         if (content_view) {
 453                 _down_view = content_view;
 454                 _down_view_position = content_view->content()->position ();
 455         }
 456
 457         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 458                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 459                 if (!cv) {
 460                         continue;
 461                 }
 462
 463                 if (!ev.ShiftDown ()) {
 464                         cv->set_selected (view == *i);
 465                 }
 466         }
 467
 468         if (content_view && ev.ShiftDown ()) {
 469                 content_view->set_selected (!content_view->selected ());
 470         }
 471
 472         _first_move = false;
 473
 474         if (_down_view) {
 475                 /* Pre-compute the points that we might snap to */
 476                 for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 477                         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 478                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 479                                 continue;
 480                         }
 481
 482                         _start_snaps.push_back (cv->content()->position());
 483                         _end_snaps.push_back (cv->content()->position());
 484                         _start_snaps.push_back (cv->content()->end());
 485                         _end_snaps.push_back (cv->content()->end());
 486
 487                         BOOST_FOREACH (DCPTime i, cv->content()->reel_split_points()) {
 488                                 _start_snaps.push_back (i);
 489                         }
 490                 }
 491
 492                 /* Tell everyone that things might change frequently during the drag */
 493                 _down_view->content()->set_change_signals_frequent (true);
 494         }
 495 }
 496
 497 void
 498 Timeline::left_up (wxMouseEvent& ev)
 499 {
 500         _left_down = false;
 501
 502         switch (_tool) {
 503         case SELECT:
 504                 left_up_select (ev);
 505                 break;
 506         case ZOOM:
 507                 left_up_zoom (ev);
 508                 break;
 509         case ZOOM_ALL:
 510         case SNAP:
 511         case SEQUENCE:
 512                 break;
 513         }
 514 }
 515
 516 void
 517 Timeline::left_up_select (wxMouseEvent& ev)
 518 {
 519         if (_down_view) {
 520                 _down_view->content()->set_change_signals_frequent (false);
 521         }
 522
 523         _content_panel->set_selection (selected_content ());
 524         set_position_from_event (ev);
 525
 526         /* Clear up up the stuff we don't do during drag */
 527         assign_tracks ();
 528         setup_scrollbars ();
 529         Refresh ();
 530
 531         _start_snaps.clear ();
 532         _end_snaps.clear ();
 533 }
 534
 535 void
 536 Timeline::left_up_zoom (wxMouseEvent& ev)
 537 {
 538         _zoom_point = ev.GetPosition ();
 539
 540         int vsx, vsy;
 541         _main_canvas->GetViewStart (&vsx, &vsy);
 542
 543         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 544         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 545
 546         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 547                 /* Very small zoom rectangle: we assume it wasn't intentional */
 548                 return;
 549         }
 550
 551         DCPTime const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 552         DCPTime const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 553         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 554
 555         double const tracks_top = double(top_left.y) / _pixels_per_track;
 556         double const tracks_bottom = double(bottom_right.y) / _pixels_per_track;
 557         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 558
 559         setup_scrollbars ();
 560         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, tracks_top * _pixels_per_track / _y_scroll_rate);
 561         _labels_canvas->Scroll (0, tracks_top * _pixels_per_track / _y_scroll_rate);
 562
 563         _zoom_point = optional<wxPoint> ();
 564         Refresh ();
 565 }
 566
 567 void
 568 Timeline::set_pixels_per_track (int h)
 569 {
 570         _pixels_per_track = max(_minimum_pixels_per_track, h);
 571 }
 572
 573 void
 574 Timeline::mouse_moved (wxMouseEvent& ev)
 575 {
 576         switch (_tool) {
 577         case SELECT:
 578                 mouse_moved_select (ev);
 579                 break;
 580         case ZOOM:
 581                 mouse_moved_zoom (ev);
 582                 break;
 583         case ZOOM_ALL:
 584         case SNAP:
 585         case SEQUENCE:
 586                 break;
 587         }
 588 }
 589
 590 void
 591 Timeline::mouse_moved_select (wxMouseEvent& ev)
 592 {
 593         if (!_left_down) {
 594                 return;
 595         }
 596
 597         set_position_from_event (ev);
 598 }
 599
 600 void
 601 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 602 {
 603         if (!_left_down) {
 604                 return;
 605         }
 606
 607         _zoom_point = ev.GetPosition ();
 608         Refresh ();
 609 }
 610
 611 void
 612 Timeline::right_down (wxMouseEvent& ev)
 613 {
 614         switch (_tool) {
 615         case SELECT:
 616                 right_down_select (ev);
 617                 break;
 618         case ZOOM:
 619                 /* Zoom out */
 620                 set_pixels_per_second (*_pixels_per_second / 2);
 621                 set_pixels_per_track (_pixels_per_track / 2);
 622                 setup_scrollbars ();
 623                 Refresh ();
 624                 break;
 625         case ZOOM_ALL:
 626         case SNAP:
 627         case SEQUENCE:
 628                 break;
 629         }
 630 }
 631
 632 void
 633 Timeline::right_down_select (wxMouseEvent& ev)
 634 {
 635         shared_ptr<TimelineView> view = event_to_view (ev);
 636         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (view);
 637         if (!cv) {
 638                 return;
 639         }
 640
 641         if (!cv->selected ()) {
 642                 clear_selection ();
 643                 cv->set_selected (true);
 644         }
 645
 646         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 647 }
 648
 649 void
 650 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 651 {
 652         DCPTime const d = a - b;
 653         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 654                 nearest_distance = d;
 655         }
 656 }
 657
 658 void
 659 Timeline::set_position_from_event (wxMouseEvent& ev)
 660 {
 661         if (!_pixels_per_second) {
 662                 return;
 663         }
 664
 665         double const pps = _pixels_per_second.get ();
 666
 667         wxPoint const p = ev.GetPosition();
 668
 669         if (!_first_move) {
 670                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 671                    before the drag is considered to have started.
 672                 */
 673                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 674                 if (dist < 8) {
 675                         return;
 676                 }
 677                 _first_move = true;
 678         }
 679
 680         if (!_down_view) {
 681                 return;
 682         }
 683
 684         DCPTime new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 685
 686         if (_snap) {
 687
 688                 DCPTime const new_end = new_position + _down_view->content()->length_after_trim();
 689                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 690                    positive is right).
 691                 */
 692                 optional<DCPTime> nearest_distance;
 693
 694                 /* Find the nearest snap point */
 695
 696                 BOOST_FOREACH (DCPTime i, _start_snaps) {
 697                         maybe_snap (i, new_position, nearest_distance);
 698                 }
 699
 700                 BOOST_FOREACH (DCPTime i, _end_snaps) {
 701                         maybe_snap (i, new_end, nearest_distance);
 702                 }
 703
 704                 if (nearest_distance) {
 705                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 706                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 707                                 new_position += nearest_distance.get ();
 708                         }
 709                 }
 710         }
 711
 712         if (new_position < DCPTime ()) {
 713                 new_position = DCPTime ();
 714         }
 715
 716         _down_view->content()->set_position (new_position);
 717
 718         shared_ptr<Film> film = _film.lock ();
 719         DCPOMATIC_ASSERT (film);
 720         film->set_sequence (false);
 721 }
 722
 723 void
 724 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 725 {
 726         RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 727 }
 728
 729 shared_ptr<const Film>
 730 Timeline::film () const
 731 {
 732         return _film.lock ();
 733 }
 734
 735 void
 736 Timeline::resized ()
 737 {
 738         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 739                 zoom_all ();
 740                 _first_resize = false;
 741         }
 742         setup_scrollbars ();
 743 }
 744
 745 void
 746 Timeline::clear_selection ()
 747 {
 748         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 749                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 750                 if (cv) {
 751                         cv->set_selected (false);
 752                 }
 753         }
 754 }
 755
 756 TimelineContentViewList
 757 Timeline::selected_views () const
 758 {
 759         TimelineContentViewList sel;
 760
 761         for (TimelineViewList::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 762                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 763                 if (cv && cv->selected()) {
 764                         sel.push_back (cv);
 765                 }
 766         }
 767
 768         return sel;
 769 }
 770
 771 ContentList
 772 Timeline::selected_content () const
 773 {
 774         ContentList sel;
 775         TimelineContentViewList views = selected_views ();
 776
 777         for (TimelineContentViewList::const_iterator i = views.begin(); i != views.end(); ++i) {
 778                 sel.push_back ((*i)->content ());
 779         }
 780
 781         return sel;
 782 }
 783
 784 void
 785 Timeline::set_selection (ContentList selection)
 786 {
 787         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 788                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 789                 if (cv) {
 790                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 791                 }
 792         }
 793 }
 794
 795 int
 796 Timeline::tracks_y_offset () const
 797 {
 798         return _reels_view->bbox().height + 4;
 799 }
 800
 801 int
 802 Timeline::width () const
 803 {
 804         return _main_canvas->GetVirtualSize().GetWidth();
 805 }
 806
 807 void
 808 Timeline::scrolled (wxScrollWinEvent& ev)
 809 {
 810         if (ev.GetOrientation() == wxVERTICAL) {
 811                 _labels_canvas->Scroll (0, ev.GetPosition ());
 812         }
 813         ev.Skip ();
 814 }
 815
 816 void
 817 Timeline::tool_clicked (Tool t)
 818 {
 819         switch (t) {
 820         case ZOOM:
 821         case SELECT:
 822                 _tool = t;
 823                 break;
 824         case ZOOM_ALL:
 825                 zoom_all ();
 826                 break;
 827         case SNAP:
 828         case SEQUENCE:
 829                 break;
 830         }
 831 }
 832
 833 void
 834 Timeline::zoom_all ()
 835 {
 836         shared_ptr<Film> film = _film.lock ();
 837         DCPOMATIC_ASSERT (film);
 838         set_pixels_per_second ((_main_canvas->GetSize().GetWidth() - 32) / film->length().seconds());
 839         set_pixels_per_track ((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / _tracks);
 840         setup_scrollbars ();
 841         _main_canvas->Scroll (0, 0);
 842         _labels_canvas->Scroll (0, 0);
 843         Refresh ();
 844 }