src/wx/timeline.cc

   1 /*
   2     Copyright (C) 2013-2021 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 "content_panel.h"
  22 #include "film_editor.h"
  23 #include "film_viewer.h"
  24 #include "timeline.h"
  25 #include "timeline_atmos_content_view.h"
  26 #include "timeline_audio_content_view.h"
  27 #include "timeline_labels_view.h"
  28 #include "timeline_reels_view.h"
  29 #include "timeline_text_content_view.h"
  30 #include "timeline_time_axis_view.h"
  31 #include "timeline_video_content_view.h"
  32 #include "wx_util.h"
  33 #include "lib/atmos_mxf_content.h"
  34 #include "lib/audio_content.h"
  35 #include "lib/film.h"
  36 #include "lib/image_content.h"
  37 #include "lib/playlist.h"
  38 #include "lib/text_content.h"
  39 #include "lib/timer.h"
  40 #include "lib/video_content.h"
  41 #include <dcp/scope_guard.h>
  42 #include <dcp/warnings.h>
  43 LIBDCP_DISABLE_WARNINGS
  44 #include <wx/graphics.h>
  45 LIBDCP_ENABLE_WARNINGS
  46 #include <iterator>
  47 #include <list>
  48
  49
  50 using std::abs;
  51 using std::dynamic_pointer_cast;
  52 using std::list;
  53 using std::make_shared;
  54 using std::max;
  55 using std::min;
  56 using std::shared_ptr;
  57 using std::weak_ptr;
  58 using boost::bind;
  59 using boost::optional;
  60 using namespace dcpomatic;
  61 #if BOOST_VERSION >= 106100
  62 using namespace boost::placeholders;
  63 #endif
  64
  65
  66 /* 3 hours in 640 pixels */
  67 double const Timeline::_minimum_pixels_per_second = 640.0 / (60 * 60 * 3);
  68 int const Timeline::_minimum_pixels_per_track = 16;
  69
  70
  71 Timeline::Timeline(wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film, FilmViewer& viewer)
  72         : wxPanel (parent, wxID_ANY)
  73         , _labels_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  74         , _main_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  75         , _content_panel (cp)
  76         , _film (film)
  77         , _viewer (viewer)
  78         , _time_axis_view (new TimelineTimeAxisView (*this, 64))
  79         , _reels_view (new TimelineReelsView (*this, 32))
  80         , _labels_view (new TimelineLabelsView (*this))
  81         , _tracks (0)
  82         , _left_down (false)
  83         , _down_view_position (0)
  84         , _first_move (false)
  85         , _menu (this, viewer)
  86         , _snap (true)
  87         , _tool (SELECT)
  88         , _x_scroll_rate (16)
  89         , _y_scroll_rate (16)
  90         , _pixels_per_track (48)
  91         , _first_resize (true)
  92         , _timer (this)
  93 {
  94 #ifndef __WXOSX__
  95         _labels_canvas->SetDoubleBuffered (true);
  96         _main_canvas->SetDoubleBuffered (true);
  97 #endif
  98
  99         auto sizer = new wxBoxSizer (wxHORIZONTAL);
 100         sizer->Add (_labels_canvas, 0, wxEXPAND);
 101         _labels_canvas->SetMinSize (wxSize (_labels_view->bbox().width, -1));
 102         sizer->Add (_main_canvas, 1, wxEXPAND);
 103         SetSizer (sizer);
 104
 105         _labels_canvas->Bind (wxEVT_PAINT,      boost::bind (&Timeline::paint_labels, this));
 106         _main_canvas->Bind   (wxEVT_PAINT,      boost::bind (&Timeline::paint_main,   this));
 107         _main_canvas->Bind   (wxEVT_LEFT_DOWN,  boost::bind (&Timeline::left_down,    this, _1));
 108         _main_canvas->Bind   (wxEVT_LEFT_UP,    boost::bind (&Timeline::left_up,      this, _1));
 109         _main_canvas->Bind   (wxEVT_RIGHT_DOWN, boost::bind (&Timeline::right_down,   this, _1));
 110         _main_canvas->Bind   (wxEVT_MOTION,     boost::bind (&Timeline::mouse_moved,  this, _1));
 111         _main_canvas->Bind   (wxEVT_SIZE,       boost::bind (&Timeline::resized,      this));
 112         _main_canvas->Bind   (wxEVT_MOUSEWHEEL, boost::bind(&Timeline::mouse_wheel_turned, this, _1));
 113         _main_canvas->Bind   (wxEVT_SCROLLWIN_TOP,        boost::bind (&Timeline::scrolled,     this, _1));
 114         _main_canvas->Bind   (wxEVT_SCROLLWIN_BOTTOM,     boost::bind (&Timeline::scrolled,     this, _1));
 115         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 116         _main_canvas->Bind   (wxEVT_SCROLLWIN_LINEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 117         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEUP,     boost::bind (&Timeline::scrolled,     this, _1));
 118         _main_canvas->Bind   (wxEVT_SCROLLWIN_PAGEDOWN,   boost::bind (&Timeline::scrolled,     this, _1));
 119         _main_canvas->Bind   (wxEVT_SCROLLWIN_THUMBTRACK, boost::bind (&Timeline::scrolled,     this, _1));
 120
 121         film_change(ChangeType::DONE, FilmProperty::CONTENT);
 122
 123         SetMinSize (wxSize (640, 4 * pixels_per_track() + 96));
 124
 125         _film_changed_connection = film->Change.connect (bind (&Timeline::film_change, this, _1, _2));
 126         _film_content_change_connection = film->ContentChange.connect (bind (&Timeline::film_content_change, this, _1, _3, _4));
 127
 128         Bind (wxEVT_TIMER, boost::bind(&Timeline::update_playhead, this));
 129         _timer.Start (200, wxTIMER_CONTINUOUS);
 130
 131         setup_scrollbars ();
 132         _labels_canvas->ShowScrollbars (wxSHOW_SB_NEVER, wxSHOW_SB_NEVER);
 133 }
 134
 135
 136 void
 137 Timeline::mouse_wheel_turned(wxMouseEvent& event)
 138 {
 139         if (event.ControlDown()) {
 140                 auto const rotation = event.GetWheelRotation();
 141                 /* On my mouse one click of the scroll wheel is 120, and it's -ve when
 142                  * scrolling the wheel towards me.
 143                  */
 144                 auto const scale = rotation > 0 ?
 145                         (1.0 / (rotation / 90.0)) :
 146                         (-rotation / 90.0);
 147
 148                 int before_start_x;
 149                 int before_start_y;
 150                 _main_canvas->GetViewStart(&before_start_x, &before_start_y);
 151
 152                 auto const before_pps = _pixels_per_second.get_value_or(1);
 153                 auto const before_pos = _last_mouse_wheel_x && *_last_mouse_wheel_x == event.GetX() ?
 154                         *_last_mouse_wheel_time :
 155                         (before_start_x * _x_scroll_rate + event.GetX()) / before_pps;
 156
 157                 set_pixels_per_second(before_pps * scale);
 158                 setup_scrollbars();
 159
 160                 auto after_left = std::max(0.0, before_pos * _pixels_per_second.get_value_or(1) - event.GetX());
 161                 _main_canvas->Scroll(after_left / _x_scroll_rate, before_start_y);
 162                 _labels_canvas->Scroll(0, before_start_y);
 163                 Refresh();
 164
 165                 if (!_last_mouse_wheel_x || *_last_mouse_wheel_x != event.GetX()) {
 166                         _last_mouse_wheel_x = event.GetX();
 167                         _last_mouse_wheel_time = before_pos;
 168                 }
 169         }
 170 }
 171
 172
 173 void
 174 Timeline::update_playhead ()
 175 {
 176         Refresh ();
 177 }
 178
 179
 180 void
 181 Timeline::set_pixels_per_second (double pps)
 182 {
 183         _pixels_per_second = max (_minimum_pixels_per_second, pps);
 184 }
 185
 186
 187 void
 188 Timeline::paint_labels ()
 189 {
 190         wxPaintDC dc (_labels_canvas);
 191
 192         auto film = _film.lock();
 193         if (film->content().empty()) {
 194                 return;
 195         }
 196
 197         auto gc = wxGraphicsContext::Create (dc);
 198         if (!gc) {
 199                 return;
 200         }
 201
 202         dcp::ScopeGuard sg = [gc]() { delete gc; };
 203
 204         int vsx, vsy;
 205         _labels_canvas->GetViewStart (&vsx, &vsy);
 206         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate + tracks_y_offset());
 207
 208         _labels_view->paint (gc, {});
 209 }
 210
 211
 212 void
 213 Timeline::paint_main ()
 214 {
 215         wxPaintDC dc (_main_canvas);
 216         dc.Clear();
 217
 218         auto film = _film.lock();
 219         if (film->content().empty()) {
 220                 return;
 221         }
 222
 223         _main_canvas->DoPrepareDC (dc);
 224
 225         auto gc = wxGraphicsContext::Create (dc);
 226         if (!gc) {
 227                 return;
 228         }
 229
 230         dcp::ScopeGuard sg = [gc]() { delete gc; };
 231
 232         gc->SetAntialiasMode (wxANTIALIAS_DEFAULT);
 233
 234         for (auto i: _views) {
 235
 236                 auto ic = dynamic_pointer_cast<TimelineContentView> (i);
 237
 238                 /* Find areas of overlap with other content views, so that we can plot them */
 239                 list<dcpomatic::Rect<int>> overlaps;
 240                 for (auto j: _views) {
 241                         auto jc = dynamic_pointer_cast<TimelineContentView> (j);
 242                         /* No overlap with non-content views, views on different tracks, audio views or non-active views */
 243                         if (!ic || !jc || i == j || ic->track() != jc->track() || ic->track().get_value_or(2) >= 2 || !ic->active() || !jc->active()) {
 244                                 continue;
 245                         }
 246
 247                         auto r = j->bbox().intersection(i->bbox());
 248                         if (r) {
 249                                 overlaps.push_back (r.get ());
 250                         }
 251                 }
 252
 253                 i->paint (gc, overlaps);
 254         }
 255
 256         if (_zoom_point) {
 257                 gc->SetPen(gui_is_dark() ? *wxWHITE_PEN : *wxBLACK_PEN);
 258                 gc->SetBrush (*wxTRANSPARENT_BRUSH);
 259                 gc->DrawRectangle (
 260                         min (_down_point.x, _zoom_point->x),
 261                         min (_down_point.y, _zoom_point->y),
 262                         abs (_down_point.x - _zoom_point->x),
 263                         abs (_down_point.y - _zoom_point->y)
 264                         );
 265         }
 266
 267         /* Playhead */
 268
 269         gc->SetPen (*wxRED_PEN);
 270         auto path = gc->CreatePath ();
 271         double const ph = _viewer.position().seconds() * pixels_per_second().get_value_or(0);
 272         path.MoveToPoint (ph, 0);
 273         path.AddLineToPoint (ph, pixels_per_track() * _tracks + 32);
 274         gc->StrokePath (path);
 275 }
 276
 277
 278 void
 279 Timeline::film_change(ChangeType type, FilmProperty p)
 280 {
 281         if (type != ChangeType::DONE) {
 282                 return;
 283         }
 284
 285         if (p == FilmProperty::CONTENT || p == FilmProperty::REEL_TYPE || p == FilmProperty::REEL_LENGTH) {
 286                 ensure_ui_thread ();
 287                 recreate_views ();
 288         } else if (p == FilmProperty::CONTENT_ORDER) {
 289                 Refresh ();
 290         }
 291 }
 292
 293
 294 void
 295 Timeline::recreate_views ()
 296 {
 297         auto film = _film.lock ();
 298         if (!film) {
 299                 return;
 300         }
 301
 302         _views.clear ();
 303         _views.push_back (_time_axis_view);
 304         _views.push_back (_reels_view);
 305
 306         for (auto i: film->content ()) {
 307                 if (i->video) {
 308                         _views.push_back (make_shared<TimelineVideoContentView>(*this, i));
 309                 }
 310
 311                 if (i->audio && !i->audio->mapping().mapped_output_channels().empty ()) {
 312                         _views.push_back (make_shared<TimelineAudioContentView>(*this, i));
 313                 }
 314
 315                 for (auto j: i->text) {
 316                         _views.push_back (make_shared<TimelineTextContentView>(*this, i, j));
 317                 }
 318
 319                 if (i->atmos) {
 320                         _views.push_back (make_shared<TimelineAtmosContentView>(*this, i));
 321                 }
 322         }
 323
 324         assign_tracks ();
 325         setup_scrollbars ();
 326         Refresh ();
 327 }
 328
 329
 330 void
 331 Timeline::film_content_change (ChangeType type, int property, bool frequent)
 332 {
 333         if (type != ChangeType::DONE) {
 334                 return;
 335         }
 336
 337         ensure_ui_thread ();
 338
 339         if (property == AudioContentProperty::STREAMS || property == VideoContentProperty::FRAME_TYPE) {
 340                 recreate_views ();
 341         } else if (property == ContentProperty::POSITION || property == ContentProperty::LENGTH) {
 342                 _reels_view->force_redraw ();
 343         } else if (!frequent) {
 344                 setup_scrollbars ();
 345                 Refresh ();
 346         }
 347 }
 348
 349
 350 template <class T>
 351 int
 352 place (shared_ptr<const Film> film, TimelineViewList& views, int& tracks)
 353 {
 354         int const base = tracks;
 355
 356         for (auto i: views) {
 357                 if (!dynamic_pointer_cast<T>(i)) {
 358                         continue;
 359                 }
 360
 361                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 362                 DCPOMATIC_ASSERT(cv);
 363
 364                 int t = base;
 365
 366                 auto content = cv->content();
 367                 DCPTimePeriod const content_period = content->period(film);
 368
 369                 while (true) {
 370                         auto j = views.begin();
 371                         while (j != views.end()) {
 372                                 auto test = dynamic_pointer_cast<T> (*j);
 373                                 if (!test) {
 374                                         ++j;
 375                                         continue;
 376                                 }
 377
 378                                 auto test_content = test->content();
 379                                 if (
 380                                         test->track() && test->track().get() == t &&
 381                                         content_period.overlap(test_content->period(film))
 382                                    ) {
 383                                         /* we have an overlap on track `t' */
 384                                         ++t;
 385                                         break;
 386                                 }
 387
 388                                 ++j;
 389                         }
 390
 391                         if (j == views.end ()) {
 392                                 /* no overlap on `t' */
 393                                 break;
 394                         }
 395                 }
 396
 397                 cv->set_track (t);
 398                 tracks = max (tracks, t + 1);
 399         }
 400
 401         return tracks - base;
 402 }
 403
 404
 405 /** Compare the mapped output channels of two TimelineViews, so we can into
 406  *  order of first mapped DCP channel.
 407  */
 408 struct AudioMappingComparator {
 409         bool operator()(shared_ptr<TimelineView> a, shared_ptr<TimelineView> b) {
 410                 int la = -1;
 411                 auto cva = dynamic_pointer_cast<TimelineAudioContentView>(a);
 412                 if (cva) {
 413                         auto oc = cva->content()->audio->mapping().mapped_output_channels();
 414                         la = *min_element(boost::begin(oc), boost::end(oc));
 415                 }
 416                 int lb = -1;
 417                 auto cvb = dynamic_pointer_cast<TimelineAudioContentView>(b);
 418                 if (cvb) {
 419                         auto oc = cvb->content()->audio->mapping().mapped_output_channels();
 420                         lb = *min_element(boost::begin(oc), boost::end(oc));
 421                 }
 422                 return la < lb;
 423         }
 424 };
 425
 426
 427 void
 428 Timeline::assign_tracks ()
 429 {
 430         /* Tracks are:
 431            Video 1
 432            Video 2
 433            Video N
 434            Text 1
 435            Text 2
 436            Text N
 437            Atmos
 438            Audio 1
 439            Audio 2
 440            Audio N
 441         */
 442
 443         auto film = _film.lock ();
 444         DCPOMATIC_ASSERT (film);
 445
 446         _tracks = 0;
 447
 448         for (auto i: _views) {
 449                 auto c = dynamic_pointer_cast<TimelineContentView>(i);
 450                 if (c) {
 451                         c->unset_track ();
 452                 }
 453         }
 454
 455         int const video_tracks = place<TimelineVideoContentView> (film, _views, _tracks);
 456         int const text_tracks = place<TimelineTextContentView> (film, _views, _tracks);
 457
 458         /* Atmos */
 459
 460         bool have_atmos = false;
 461         for (auto i: _views) {
 462                 auto cv = dynamic_pointer_cast<TimelineAtmosContentView>(i);
 463                 if (cv) {
 464                         cv->set_track (_tracks);
 465                         have_atmos = true;
 466                 }
 467         }
 468
 469         if (have_atmos) {
 470                 ++_tracks;
 471         }
 472
 473         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 474            DCP channel index.
 475         */
 476
 477         auto views = _views;
 478         sort(views.begin(), views.end(), AudioMappingComparator());
 479         int const audio_tracks = place<TimelineAudioContentView> (film, views, _tracks);
 480
 481         _labels_view->set_video_tracks (video_tracks);
 482         _labels_view->set_audio_tracks (audio_tracks);
 483         _labels_view->set_text_tracks (text_tracks);
 484         _labels_view->set_atmos (have_atmos);
 485
 486         _time_axis_view->set_y (tracks());
 487         _reels_view->set_y (8);
 488 }
 489
 490
 491 int
 492 Timeline::tracks () const
 493 {
 494         return _tracks;
 495 }
 496
 497
 498 void
 499 Timeline::setup_scrollbars ()
 500 {
 501         auto film = _film.lock ();
 502         if (!film || !_pixels_per_second) {
 503                 return;
 504         }
 505
 506         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 507
 508         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 509         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 510         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 511         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 512 }
 513
 514
 515 shared_ptr<TimelineView>
 516 Timeline::event_to_view (wxMouseEvent& ev)
 517 {
 518         /* Search backwards through views so that we find the uppermost one first */
 519         auto i = _views.rbegin();
 520
 521         int vsx, vsy;
 522         _main_canvas->GetViewStart (&vsx, &vsy);
 523         Position<int> const p (ev.GetX() + vsx * _x_scroll_rate, ev.GetY() + vsy * _y_scroll_rate);
 524
 525         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 526                 ++i;
 527         }
 528
 529         if (i == _views.rend ()) {
 530                 return {};
 531         }
 532
 533         return *i;
 534 }
 535
 536
 537 void
 538 Timeline::left_down (wxMouseEvent& ev)
 539 {
 540         _left_down = true;
 541         _down_point = ev.GetPosition ();
 542
 543         switch (_tool) {
 544         case SELECT:
 545                 left_down_select (ev);
 546                 break;
 547         case ZOOM:
 548         case ZOOM_ALL:
 549         case SNAP:
 550         case SEQUENCE:
 551                 /* Nothing to do */
 552                 break;
 553         }
 554 }
 555
 556
 557 void
 558 Timeline::left_down_select (wxMouseEvent& ev)
 559 {
 560         auto view = event_to_view (ev);
 561         auto content_view = dynamic_pointer_cast<TimelineContentView>(view);
 562
 563         _down_view.reset ();
 564
 565         if (content_view) {
 566                 _down_view = content_view;
 567                 _down_view_position = content_view->content()->position ();
 568         }
 569
 570         if (dynamic_pointer_cast<TimelineTimeAxisView>(view)) {
 571                 int vsx, vsy;
 572                 _main_canvas->GetViewStart(&vsx, &vsy);
 573                 _viewer.seek(DCPTime::from_seconds((ev.GetPosition().x + vsx * _x_scroll_rate) / _pixels_per_second.get_value_or(1)), true);
 574         }
 575
 576         for (auto i: _views) {
 577                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 578                 if (!cv) {
 579                         continue;
 580                 }
 581
 582                 if (!ev.ShiftDown ()) {
 583                         cv->set_selected (view == i);
 584                 }
 585         }
 586
 587         if (content_view && ev.ShiftDown ()) {
 588                 content_view->set_selected (!content_view->selected ());
 589         }
 590
 591         _first_move = false;
 592
 593         if (_down_view) {
 594                 /* Pre-compute the points that we might snap to */
 595                 for (auto i: _views) {
 596                         auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 597                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 598                                 continue;
 599                         }
 600
 601                         auto film = _film.lock ();
 602                         DCPOMATIC_ASSERT (film);
 603
 604                         _start_snaps.push_back (cv->content()->position());
 605                         _end_snaps.push_back (cv->content()->position());
 606                         _start_snaps.push_back (cv->content()->end(film));
 607                         _end_snaps.push_back (cv->content()->end(film));
 608
 609                         for (auto i: cv->content()->reel_split_points(film)) {
 610                                 _start_snaps.push_back (i);
 611                         }
 612                 }
 613
 614                 /* Tell everyone that things might change frequently during the drag */
 615                 _down_view->content()->set_change_signals_frequent (true);
 616         }
 617 }
 618
 619
 620 void
 621 Timeline::left_up (wxMouseEvent& ev)
 622 {
 623         _left_down = false;
 624
 625         switch (_tool) {
 626         case SELECT:
 627                 left_up_select (ev);
 628                 break;
 629         case ZOOM:
 630                 left_up_zoom (ev);
 631                 break;
 632         case ZOOM_ALL:
 633         case SNAP:
 634         case SEQUENCE:
 635                 break;
 636         }
 637 }
 638
 639
 640 void
 641 Timeline::left_up_select (wxMouseEvent& ev)
 642 {
 643         if (_down_view) {
 644                 _down_view->content()->set_change_signals_frequent (false);
 645         }
 646
 647         _content_panel->set_selection (selected_content ());
 648         /* Since we may have just set change signals back to `not-frequent', we have to
 649            make sure this position change is signalled, even if the position value has
 650            not changed since the last time it was set (with frequent=true).  This is
 651            a bit of a hack.
 652         */
 653         set_position_from_event (ev, true);
 654
 655         /* Clear up up the stuff we don't do during drag */
 656         assign_tracks ();
 657         setup_scrollbars ();
 658         Refresh ();
 659
 660         _start_snaps.clear ();
 661         _end_snaps.clear ();
 662 }
 663
 664
 665 void
 666 Timeline::left_up_zoom (wxMouseEvent& ev)
 667 {
 668         _zoom_point = ev.GetPosition ();
 669
 670         int vsx, vsy;
 671         _main_canvas->GetViewStart (&vsx, &vsy);
 672
 673         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 674         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 675
 676         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 677                 /* Very small zoom rectangle: we assume it wasn't intentional */
 678                 _zoom_point = optional<wxPoint> ();
 679                 Refresh ();
 680                 return;
 681         }
 682
 683         auto const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 684         auto const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 685         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 686
 687         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 688         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 689         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 690
 691         setup_scrollbars ();
 692         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 693         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 694         _labels_canvas->Scroll (0, y);
 695
 696         _zoom_point = optional<wxPoint> ();
 697         Refresh ();
 698 }
 699
 700
 701 void
 702 Timeline::set_pixels_per_track (int h)
 703 {
 704         _pixels_per_track = max(_minimum_pixels_per_track, h);
 705 }
 706
 707
 708 void
 709 Timeline::mouse_moved (wxMouseEvent& ev)
 710 {
 711         switch (_tool) {
 712         case SELECT:
 713                 mouse_moved_select (ev);
 714                 break;
 715         case ZOOM:
 716                 mouse_moved_zoom (ev);
 717                 break;
 718         case ZOOM_ALL:
 719         case SNAP:
 720         case SEQUENCE:
 721                 break;
 722         }
 723 }
 724
 725
 726 void
 727 Timeline::mouse_moved_select (wxMouseEvent& ev)
 728 {
 729         if (!_left_down) {
 730                 return;
 731         }
 732
 733         set_position_from_event (ev);
 734 }
 735
 736
 737 void
 738 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 739 {
 740         if (!_left_down) {
 741                 return;
 742         }
 743
 744         _zoom_point = ev.GetPosition ();
 745         setup_scrollbars();
 746         Refresh ();
 747 }
 748
 749
 750 void
 751 Timeline::right_down (wxMouseEvent& ev)
 752 {
 753         switch (_tool) {
 754         case SELECT:
 755                 right_down_select (ev);
 756                 break;
 757         case ZOOM:
 758                 /* Zoom out */
 759                 set_pixels_per_second (*_pixels_per_second / 2);
 760                 set_pixels_per_track (_pixels_per_track / 2);
 761                 setup_scrollbars ();
 762                 Refresh ();
 763                 break;
 764         case ZOOM_ALL:
 765         case SNAP:
 766         case SEQUENCE:
 767                 break;
 768         }
 769 }
 770
 771
 772 void
 773 Timeline::right_down_select (wxMouseEvent& ev)
 774 {
 775         auto view = event_to_view (ev);
 776         auto cv = dynamic_pointer_cast<TimelineContentView> (view);
 777         if (!cv) {
 778                 return;
 779         }
 780
 781         if (!cv->selected ()) {
 782                 clear_selection ();
 783                 cv->set_selected (true);
 784         }
 785
 786         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 787 }
 788
 789
 790 void
 791 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 792 {
 793         auto const d = a - b;
 794         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 795                 nearest_distance = d;
 796         }
 797 }
 798
 799
 800 void
 801 Timeline::set_position_from_event (wxMouseEvent& ev, bool force_emit)
 802 {
 803         if (!_pixels_per_second) {
 804                 return;
 805         }
 806
 807         double const pps = _pixels_per_second.get ();
 808
 809         auto const p = ev.GetPosition();
 810
 811         if (!_first_move) {
 812                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 813                    before the drag is considered to have started.
 814                 */
 815                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 816                 if (dist < 8) {
 817                         return;
 818                 }
 819                 _first_move = true;
 820         }
 821
 822         if (!_down_view) {
 823                 return;
 824         }
 825
 826         auto new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 827
 828         auto film = _film.lock ();
 829         DCPOMATIC_ASSERT (film);
 830
 831         if (_snap) {
 832                 auto const new_end = new_position + _down_view->content()->length_after_trim(film);
 833                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 834                    positive is right).
 835                 */
 836                 optional<DCPTime> nearest_distance;
 837
 838                 /* Find the nearest snap point */
 839
 840                 for (auto i: _start_snaps) {
 841                         maybe_snap (i, new_position, nearest_distance);
 842                 }
 843
 844                 for (auto i: _end_snaps) {
 845                         maybe_snap (i, new_end, nearest_distance);
 846                 }
 847
 848                 if (nearest_distance) {
 849                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 850                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 851                                 new_position += nearest_distance.get ();
 852                         }
 853                 }
 854         }
 855
 856         if (new_position < DCPTime ()) {
 857                 new_position = DCPTime ();
 858         }
 859
 860         _down_view->content()->set_position (film, new_position, force_emit);
 861
 862         film->set_sequence (false);
 863 }
 864
 865
 866 void
 867 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 868 {
 869         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 870 }
 871
 872
 873 shared_ptr<const Film>
 874 Timeline::film () const
 875 {
 876         return _film.lock ();
 877 }
 878
 879
 880 void
 881 Timeline::resized ()
 882 {
 883         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 884                 zoom_all ();
 885                 _first_resize = false;
 886         }
 887         setup_scrollbars ();
 888 }
 889
 890
 891 void
 892 Timeline::clear_selection ()
 893 {
 894         for (auto i: _views) {
 895                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView>(i);
 896                 if (cv) {
 897                         cv->set_selected (false);
 898                 }
 899         }
 900 }
 901
 902
 903 TimelineContentViewList
 904 Timeline::selected_views () const
 905 {
 906         TimelineContentViewList sel;
 907
 908         for (auto i: _views) {
 909                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 910                 if (cv && cv->selected()) {
 911                         sel.push_back (cv);
 912                 }
 913         }
 914
 915         return sel;
 916 }
 917
 918
 919 ContentList
 920 Timeline::selected_content () const
 921 {
 922         ContentList sel;
 923
 924         for (auto i: selected_views()) {
 925                 sel.push_back(i->content());
 926         }
 927
 928         return sel;
 929 }
 930
 931
 932 void
 933 Timeline::set_selection (ContentList selection)
 934 {
 935         for (auto i: _views) {
 936                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 937                 if (cv) {
 938                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 939                 }
 940         }
 941 }
 942
 943
 944 int
 945 Timeline::tracks_y_offset () const
 946 {
 947         return _reels_view->bbox().height + 4;
 948 }
 949
 950
 951 int
 952 Timeline::width () const
 953 {
 954         return _main_canvas->GetVirtualSize().GetWidth();
 955 }
 956
 957
 958 void
 959 Timeline::scrolled (wxScrollWinEvent& ev)
 960 {
 961         if (ev.GetOrientation() == wxVERTICAL) {
 962                 int x, y;
 963                 _main_canvas->GetViewStart (&x, &y);
 964                 _labels_canvas->Scroll (0, y);
 965         }
 966         ev.Skip ();
 967 }
 968
 969
 970 void
 971 Timeline::tool_clicked (Tool t)
 972 {
 973         switch (t) {
 974         case ZOOM:
 975         case SELECT:
 976                 _tool = t;
 977                 break;
 978         case ZOOM_ALL:
 979                 zoom_all ();
 980                 break;
 981         case SNAP:
 982         case SEQUENCE:
 983                 break;
 984         }
 985 }
 986
 987
 988 void
 989 Timeline::zoom_all ()
 990 {
 991         auto film = _film.lock ();
 992         DCPOMATIC_ASSERT (film);
 993         set_pixels_per_second((_main_canvas->GetSize().GetWidth() - 32) / std::max(1.0, film->length().seconds()));
 994         set_pixels_per_track((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / std::max(1, _tracks));
 995         setup_scrollbars ();
 996         _main_canvas->Scroll (0, 0);
 997         _labels_canvas->Scroll (0, 0);
 998         Refresh ();
 999 }
1000
1001
1002 void
1003 Timeline::keypress(wxKeyEvent const& event)
1004 {
1005         if (event.GetKeyCode() == WXK_DELETE) {
1006                 auto film = _film.lock();
1007                 DCPOMATIC_ASSERT(film);
1008                 film->remove_content(selected_content());
1009         } else {
1010                 switch (event.GetRawKeyCode()) {
1011                 case '+':
1012                         set_pixels_per_second(_pixels_per_second.get_value_or(1) * 2);
1013                         setup_scrollbars();
1014                         break;
1015                 case '-':
1016                         set_pixels_per_second(_pixels_per_second.get_value_or(1) / 2);
1017                         setup_scrollbars();
1018                         break;
1019                 }
1020         }
1021 }
1022