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