src/wx/content_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 "content_timeline.h"
  23 #include "film_editor.h"
  24 #include "film_viewer.h"
  25 #include "content_timeline_atmos_view.h"
  26 #include "content_timeline_audio_view.h"
  27 #include "content_timeline_text_view.h"
  28 #include "content_timeline_video_view.h"
  29 #include "timeline_labels_view.h"
  30 #include "timeline_reels_view.h"
  31 #include "timeline_time_axis_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 int const ContentTimeline::_minimum_pixels_per_track = 16;
  67
  68
  69 ContentTimeline::ContentTimeline(wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film, FilmViewer& viewer)
  70         : Timeline(parent)
  71         , _labels_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  72         , _main_canvas (new wxScrolledCanvas (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE))
  73         , _content_panel (cp)
  74         , _film (film)
  75         , _viewer (viewer)
  76         , _time_axis_view (new TimelineTimeAxisView (*this, 64))
  77         , _reels_view (new TimelineReelsView (*this, 32))
  78         , _labels_view (new TimelineLabelsView (*this))
  79         , _tracks (0)
  80         , _left_down (false)
  81         , _down_view_position (0)
  82         , _first_move (false)
  83         , _menu (this, viewer)
  84         , _snap (true)
  85         , _tool (SELECT)
  86         , _x_scroll_rate (16)
  87         , _y_scroll_rate (16)
  88         , _pixels_per_track (48)
  89         , _first_resize (true)
  90         , _timer (this)
  91 {
  92 #ifndef __WXOSX__
  93         _labels_canvas->SetDoubleBuffered (true);
  94         _main_canvas->SetDoubleBuffered (true);
  95 #endif
  96
  97         auto sizer = new wxBoxSizer (wxHORIZONTAL);
  98         sizer->Add (_labels_canvas, 0, wxEXPAND);
  99         _labels_canvas->SetMinSize (wxSize (_labels_view->bbox().width, -1));
 100         sizer->Add (_main_canvas, 1, wxEXPAND);
 101         SetSizer (sizer);
 102
 103         _labels_canvas->Bind(wxEVT_PAINT,      boost::bind(&ContentTimeline::paint_labels, this));
 104         _main_canvas->Bind  (wxEVT_PAINT,      boost::bind(&ContentTimeline::paint_main,   this));
 105         _main_canvas->Bind  (wxEVT_LEFT_DOWN,  boost::bind(&ContentTimeline::left_down,    this, _1));
 106         _main_canvas->Bind  (wxEVT_LEFT_UP,    boost::bind(&ContentTimeline::left_up,      this, _1));
 107         _main_canvas->Bind  (wxEVT_RIGHT_DOWN, boost::bind(&ContentTimeline::right_down,   this, _1));
 108         _main_canvas->Bind  (wxEVT_MOTION,     boost::bind(&ContentTimeline::mouse_moved,  this, _1));
 109         _main_canvas->Bind  (wxEVT_SIZE,       boost::bind(&ContentTimeline::resized,      this));
 110         _main_canvas->Bind  (wxEVT_MOUSEWHEEL, boost::bind(&ContentTimeline::mouse_wheel_turned, this, _1));
 111         _main_canvas->Bind  (wxEVT_SCROLLWIN_TOP,        boost::bind(&ContentTimeline::scrolled,     this, _1));
 112         _main_canvas->Bind  (wxEVT_SCROLLWIN_BOTTOM,     boost::bind(&ContentTimeline::scrolled,     this, _1));
 113         _main_canvas->Bind  (wxEVT_SCROLLWIN_LINEUP,     boost::bind(&ContentTimeline::scrolled,     this, _1));
 114         _main_canvas->Bind  (wxEVT_SCROLLWIN_LINEDOWN,   boost::bind(&ContentTimeline::scrolled,     this, _1));
 115         _main_canvas->Bind  (wxEVT_SCROLLWIN_PAGEUP,     boost::bind(&ContentTimeline::scrolled,     this, _1));
 116         _main_canvas->Bind  (wxEVT_SCROLLWIN_PAGEDOWN,   boost::bind(&ContentTimeline::scrolled,     this, _1));
 117         _main_canvas->Bind  (wxEVT_SCROLLWIN_THUMBTRACK, boost::bind(&ContentTimeline::scrolled,     this, _1));
 118
 119         film_change(ChangeType::DONE, FilmProperty::CONTENT);
 120
 121         SetMinSize (wxSize (640, 4 * pixels_per_track() + 96));
 122
 123         _film_changed_connection = film->Change.connect(bind(&ContentTimeline::film_change, this, _1, _2));
 124         _film_content_change_connection = film->ContentChange.connect(bind(&ContentTimeline::film_content_change, this, _1, _3, _4));
 125
 126         Bind(wxEVT_TIMER, boost::bind(&ContentTimeline::update_playhead, this));
 127         _timer.Start (200, wxTIMER_CONTINUOUS);
 128
 129         setup_scrollbars ();
 130         _labels_canvas->ShowScrollbars (wxSHOW_SB_NEVER, wxSHOW_SB_NEVER);
 131 }
 132
 133
 134 void
 135 ContentTimeline::mouse_wheel_turned(wxMouseEvent& event)
 136 {
 137         auto const rotation = event.GetWheelRotation();
 138
 139         if (event.ControlDown()) {
 140                 /* On my mouse one click of the scroll wheel is 120, and it's -ve when
 141                  * scrolling the wheel towards me.
 142                  */
 143                 auto const scale = rotation > 0 ?
 144                         (1.0 / (rotation / 90.0)) :
 145                         (-rotation / 90.0);
 146
 147                 int before_start_x;
 148                 int before_start_y;
 149                 _main_canvas->GetViewStart(&before_start_x, &before_start_y);
 150
 151                 auto const before_pps = _pixels_per_second.get_value_or(1);
 152                 auto const before_pos = _last_mouse_wheel_x && *_last_mouse_wheel_x == event.GetX() ?
 153                         *_last_mouse_wheel_time :
 154                         (before_start_x * _x_scroll_rate + event.GetX()) / before_pps;
 155
 156                 set_pixels_per_second(before_pps * scale);
 157                 setup_scrollbars();
 158
 159                 auto after_left = std::max(0.0, before_pos * _pixels_per_second.get_value_or(1) - event.GetX());
 160                 _main_canvas->Scroll(after_left / _x_scroll_rate, before_start_y);
 161                 _labels_canvas->Scroll(0, before_start_y);
 162                 Refresh();
 163
 164                 if (!_last_mouse_wheel_x || *_last_mouse_wheel_x != event.GetX()) {
 165                         _last_mouse_wheel_x = event.GetX();
 166                         _last_mouse_wheel_time = before_pos;
 167                 }
 168         } else if (event.ShiftDown()) {
 169                 int before_start_x;
 170                 int before_start_y;
 171                 _main_canvas->GetViewStart(&before_start_x, &before_start_y);
 172                 auto const width = _main_canvas->GetSize().GetWidth();
 173                 _main_canvas->Scroll(std::max(0.0, before_start_x - rotation * 100.0 / width), before_start_y);
 174         }
 175 }
 176
 177
 178 void
 179 ContentTimeline::update_playhead()
 180 {
 181         Refresh ();
 182 }
 183
 184
 185 void
 186 ContentTimeline::paint_labels()
 187 {
 188         wxPaintDC dc (_labels_canvas);
 189
 190         auto film = _film.lock();
 191         if (film->content().empty()) {
 192                 return;
 193         }
 194
 195         auto gc = wxGraphicsContext::Create (dc);
 196         if (!gc) {
 197                 return;
 198         }
 199
 200         dcp::ScopeGuard sg = [gc]() { delete gc; };
 201
 202         int vsx, vsy;
 203         _labels_canvas->GetViewStart (&vsx, &vsy);
 204         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate + tracks_y_offset());
 205
 206         _labels_view->paint (gc, {});
 207 }
 208
 209
 210 void
 211 ContentTimeline::paint_main()
 212 {
 213         wxPaintDC dc (_main_canvas);
 214         dc.Clear();
 215
 216         auto film = _film.lock();
 217         if (film->content().empty()) {
 218                 return;
 219         }
 220
 221         _main_canvas->DoPrepareDC (dc);
 222
 223         auto gc = wxGraphicsContext::Create (dc);
 224         if (!gc) {
 225                 return;
 226         }
 227
 228         dcp::ScopeGuard sg = [gc]() { delete gc; };
 229
 230         gc->SetAntialiasMode (wxANTIALIAS_DEFAULT);
 231
 232         for (auto i: _views) {
 233
 234                 auto ic = dynamic_pointer_cast<TimelineContentView> (i);
 235
 236                 /* Find areas of overlap with other content views, so that we can plot them */
 237                 list<dcpomatic::Rect<int>> overlaps;
 238                 for (auto j: _views) {
 239                         auto jc = dynamic_pointer_cast<TimelineContentView> (j);
 240                         /* No overlap with non-content views, views on different tracks, audio views or non-active views */
 241                         if (!ic || !jc || i == j || ic->track() != jc->track() || ic->track().get_value_or(2) >= 2 || !ic->active() || !jc->active()) {
 242                                 continue;
 243                         }
 244
 245                         auto r = j->bbox().intersection(i->bbox());
 246                         if (r) {
 247                                 overlaps.push_back (r.get ());
 248                         }
 249                 }
 250
 251                 i->paint (gc, overlaps);
 252         }
 253
 254         if (_zoom_point) {
 255                 gc->SetPen(gui_is_dark() ? *wxWHITE_PEN : *wxBLACK_PEN);
 256                 gc->SetBrush (*wxTRANSPARENT_BRUSH);
 257                 gc->DrawRectangle (
 258                         min (_down_point.x, _zoom_point->x),
 259                         min (_down_point.y, _zoom_point->y),
 260                         abs (_down_point.x - _zoom_point->x),
 261                         abs (_down_point.y - _zoom_point->y)
 262                         );
 263         }
 264
 265         /* Playhead */
 266
 267         gc->SetPen (*wxRED_PEN);
 268         auto path = gc->CreatePath ();
 269         double const ph = _viewer.position().seconds() * pixels_per_second().get_value_or(0);
 270         path.MoveToPoint (ph, 0);
 271         path.AddLineToPoint (ph, pixels_per_track() * _tracks + 32);
 272         gc->StrokePath (path);
 273 }
 274
 275
 276 void
 277 ContentTimeline::film_change(ChangeType type, FilmProperty p)
 278 {
 279         if (type != ChangeType::DONE) {
 280                 return;
 281         }
 282
 283         if (p == FilmProperty::CONTENT || p == FilmProperty::REEL_TYPE || p == FilmProperty::REEL_LENGTH) {
 284                 ensure_ui_thread ();
 285                 recreate_views ();
 286         } else if (p == FilmProperty::CONTENT_ORDER) {
 287                 Refresh ();
 288         }
 289 }
 290
 291
 292 void
 293 ContentTimeline::recreate_views()
 294 {
 295         auto film = _film.lock ();
 296         if (!film) {
 297                 return;
 298         }
 299
 300         _views.clear ();
 301         _views.push_back (_time_axis_view);
 302         _views.push_back (_reels_view);
 303
 304         for (auto i: film->content ()) {
 305                 if (i->video) {
 306                         _views.push_back(make_shared<ContentTimelineVideoView>(*this, i));
 307                 }
 308
 309                 if (i->audio && !i->audio->mapping().mapped_output_channels().empty ()) {
 310                         _views.push_back(make_shared<ContentTimelineAudioView>(*this, i));
 311                 }
 312
 313                 for (auto j: i->text) {
 314                         _views.push_back(make_shared<ContentTimelineTextView>(*this, i, j));
 315                 }
 316
 317                 if (i->atmos) {
 318                         _views.push_back(make_shared<ContentTimelineAtmosView>(*this, i));
 319                 }
 320         }
 321
 322         assign_tracks ();
 323         setup_scrollbars ();
 324         Refresh ();
 325 }
 326
 327
 328 void
 329 ContentTimeline::film_content_change(ChangeType type, int property, bool frequent)
 330 {
 331         if (type != ChangeType::DONE) {
 332                 return;
 333         }
 334
 335         ensure_ui_thread ();
 336
 337         if (property == AudioContentProperty::STREAMS || property == VideoContentProperty::FRAME_TYPE) {
 338                 recreate_views ();
 339         } else if (property == ContentProperty::POSITION || property == ContentProperty::LENGTH) {
 340                 _reels_view->force_redraw ();
 341         } else if (!frequent) {
 342                 setup_scrollbars ();
 343                 Refresh ();
 344         }
 345 }
 346
 347
 348 template <class T>
 349 int
 350 place(shared_ptr<const Film> film, ContentTimelineViewList& views, int& tracks)
 351 {
 352         int const base = tracks;
 353
 354         for (auto i: views) {
 355                 if (!dynamic_pointer_cast<T>(i)) {
 356                         continue;
 357                 }
 358
 359                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 360                 DCPOMATIC_ASSERT(cv);
 361
 362                 int t = base;
 363
 364                 auto content = cv->content();
 365                 DCPTimePeriod const content_period = content->period(film);
 366
 367                 while (true) {
 368                         auto j = views.begin();
 369                         while (j != views.end()) {
 370                                 auto test = dynamic_pointer_cast<T> (*j);
 371                                 if (!test) {
 372                                         ++j;
 373                                         continue;
 374                                 }
 375
 376                                 auto test_content = test->content();
 377                                 if (
 378                                         test->track() && test->track().get() == t &&
 379                                         content_period.overlap(test_content->period(film))
 380                                    ) {
 381                                         /* we have an overlap on track `t' */
 382                                         ++t;
 383                                         break;
 384                                 }
 385
 386                                 ++j;
 387                         }
 388
 389                         if (j == views.end ()) {
 390                                 /* no overlap on `t' */
 391                                 break;
 392                         }
 393                 }
 394
 395                 cv->set_track (t);
 396                 tracks = max (tracks, t + 1);
 397         }
 398
 399         return tracks - base;
 400 }
 401
 402
 403 /** Compare the mapped output channels of two TimelineViews, so we can into
 404  *  order of first mapped DCP channel.
 405  */
 406 struct AudioMappingComparator {
 407         bool operator()(shared_ptr<ContentTimelineView> a, shared_ptr<ContentTimelineView> b) {
 408                 int la = -1;
 409                 auto cva = dynamic_pointer_cast<ContentTimelineAudioView>(a);
 410                 if (cva) {
 411                         auto oc = cva->content()->audio->mapping().mapped_output_channels();
 412                         la = *min_element(boost::begin(oc), boost::end(oc));
 413                 }
 414                 int lb = -1;
 415                 auto cvb = dynamic_pointer_cast<ContentTimelineAudioView>(b);
 416                 if (cvb) {
 417                         auto oc = cvb->content()->audio->mapping().mapped_output_channels();
 418                         lb = *min_element(boost::begin(oc), boost::end(oc));
 419                 }
 420                 return la < lb;
 421         }
 422 };
 423
 424
 425 void
 426 ContentTimeline::assign_tracks()
 427 {
 428         /* Tracks are:
 429            Video 1
 430            Video 2
 431            Video N
 432            Text 1
 433            Text 2
 434            Text N
 435            Atmos
 436            Audio 1
 437            Audio 2
 438            Audio N
 439         */
 440
 441         auto film = _film.lock ();
 442         DCPOMATIC_ASSERT (film);
 443
 444         _tracks = 0;
 445
 446         for (auto i: _views) {
 447                 auto c = dynamic_pointer_cast<TimelineContentView>(i);
 448                 if (c) {
 449                         c->unset_track ();
 450                 }
 451         }
 452
 453         int const video_tracks = place<ContentTimelineVideoView>(film, _views, _tracks);
 454         int const text_tracks = place<ContentTimelineTextView>(film, _views, _tracks);
 455
 456         /* Atmos */
 457
 458         bool have_atmos = false;
 459         for (auto i: _views) {
 460                 auto cv = dynamic_pointer_cast<ContentTimelineAtmosView>(i);
 461                 if (cv) {
 462                         cv->set_track (_tracks);
 463                         have_atmos = true;
 464                 }
 465         }
 466
 467         if (have_atmos) {
 468                 ++_tracks;
 469         }
 470
 471         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 472            DCP channel index.
 473         */
 474
 475         auto views = _views;
 476         sort(views.begin(), views.end(), AudioMappingComparator());
 477         int const audio_tracks = place<ContentTimelineAudioView>(film, views, _tracks);
 478
 479         _labels_view->set_video_tracks (video_tracks);
 480         _labels_view->set_audio_tracks (audio_tracks);
 481         _labels_view->set_text_tracks (text_tracks);
 482         _labels_view->set_atmos (have_atmos);
 483
 484         _time_axis_view->set_y (tracks());
 485         _reels_view->set_y (8);
 486 }
 487
 488
 489 int
 490 ContentTimeline::tracks() const
 491 {
 492         return _tracks;
 493 }
 494
 495
 496 void
 497 ContentTimeline::setup_scrollbars()
 498 {
 499         auto film = _film.lock ();
 500         if (!film || !_pixels_per_second) {
 501                 return;
 502         }
 503
 504         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 505
 506         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 507         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 508         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 509         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 510 }
 511
 512
 513 shared_ptr<ContentTimelineView>
 514 ContentTimeline::event_to_view(wxMouseEvent& ev)
 515 {
 516         /* Search backwards through views so that we find the uppermost one first */
 517         auto i = _views.rbegin();
 518
 519         int vsx, vsy;
 520         _main_canvas->GetViewStart (&vsx, &vsy);
 521         Position<int> const p (ev.GetX() + vsx * _x_scroll_rate, ev.GetY() + vsy * _y_scroll_rate);
 522
 523         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 524                 ++i;
 525         }
 526
 527         if (i == _views.rend ()) {
 528                 return {};
 529         }
 530
 531         return *i;
 532 }
 533
 534
 535 void
 536 ContentTimeline::left_down(wxMouseEvent& ev)
 537 {
 538         _left_down = true;
 539         _down_point = ev.GetPosition ();
 540
 541         switch (_tool) {
 542         case SELECT:
 543                 left_down_select (ev);
 544                 break;
 545         case ZOOM:
 546         case ZOOM_ALL:
 547         case SNAP:
 548         case SEQUENCE:
 549                 /* Nothing to do */
 550                 break;
 551         }
 552 }
 553
 554
 555 void
 556 ContentTimeline::left_down_select(wxMouseEvent& ev)
 557 {
 558         auto view = event_to_view (ev);
 559         auto content_view = dynamic_pointer_cast<TimelineContentView>(view);
 560
 561         _down_view.reset ();
 562
 563         if (content_view) {
 564                 _down_view = content_view;
 565                 _down_view_position = content_view->content()->position ();
 566         }
 567
 568         if (dynamic_pointer_cast<TimelineTimeAxisView>(view)) {
 569                 int vsx, vsy;
 570                 _main_canvas->GetViewStart(&vsx, &vsy);
 571                 _viewer.seek(DCPTime::from_seconds((ev.GetPosition().x + vsx * _x_scroll_rate) / _pixels_per_second.get_value_or(1)), true);
 572         }
 573
 574         for (auto i: _views) {
 575                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 576                 if (!cv) {
 577                         continue;
 578                 }
 579
 580                 if (!ev.ShiftDown ()) {
 581                         cv->set_selected (view == i);
 582                 }
 583         }
 584
 585         if (content_view && ev.ShiftDown ()) {
 586                 content_view->set_selected (!content_view->selected ());
 587         }
 588
 589         _first_move = false;
 590
 591         if (_down_view) {
 592                 /* Pre-compute the points that we might snap to */
 593                 for (auto i: _views) {
 594                         auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 595                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 596                                 continue;
 597                         }
 598
 599                         auto film = _film.lock ();
 600                         DCPOMATIC_ASSERT (film);
 601
 602                         _start_snaps.push_back (cv->content()->position());
 603                         _end_snaps.push_back (cv->content()->position());
 604                         _start_snaps.push_back (cv->content()->end(film));
 605                         _end_snaps.push_back (cv->content()->end(film));
 606
 607                         for (auto i: cv->content()->reel_split_points(film)) {
 608                                 _start_snaps.push_back (i);
 609                         }
 610                 }
 611
 612                 /* Tell everyone that things might change frequently during the drag */
 613                 _down_view->content()->set_change_signals_frequent (true);
 614         }
 615 }
 616
 617
 618 void
 619 ContentTimeline::left_up(wxMouseEvent& ev)
 620 {
 621         _left_down = false;
 622
 623         switch (_tool) {
 624         case SELECT:
 625                 left_up_select (ev);
 626                 break;
 627         case ZOOM:
 628                 left_up_zoom (ev);
 629                 break;
 630         case ZOOM_ALL:
 631         case SNAP:
 632         case SEQUENCE:
 633                 break;
 634         }
 635 }
 636
 637
 638 void
 639 ContentTimeline::left_up_select(wxMouseEvent& ev)
 640 {
 641         if (_down_view) {
 642                 _down_view->content()->set_change_signals_frequent (false);
 643         }
 644
 645         _content_panel->set_selection (selected_content ());
 646         /* Since we may have just set change signals back to `not-frequent', we have to
 647            make sure this position change is signalled, even if the position value has
 648            not changed since the last time it was set (with frequent=true).  This is
 649            a bit of a hack.
 650         */
 651         set_position_from_event (ev, true);
 652
 653         /* Clear up up the stuff we don't do during drag */
 654         assign_tracks ();
 655         setup_scrollbars ();
 656         Refresh ();
 657
 658         _start_snaps.clear ();
 659         _end_snaps.clear ();
 660 }
 661
 662
 663 void
 664 ContentTimeline::left_up_zoom(wxMouseEvent& ev)
 665 {
 666         _zoom_point = ev.GetPosition ();
 667
 668         int vsx, vsy;
 669         _main_canvas->GetViewStart (&vsx, &vsy);
 670
 671         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 672         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 673
 674         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 675                 /* Very small zoom rectangle: we assume it wasn't intentional */
 676                 _zoom_point = optional<wxPoint> ();
 677                 Refresh ();
 678                 return;
 679         }
 680
 681         auto const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 682         auto const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 683         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 684
 685         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 686         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 687         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 688
 689         setup_scrollbars ();
 690         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 691         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 692         _labels_canvas->Scroll (0, y);
 693
 694         _zoom_point = optional<wxPoint> ();
 695         Refresh ();
 696 }
 697
 698
 699 void
 700 ContentTimeline::set_pixels_per_track(int h)
 701 {
 702         _pixels_per_track = max(_minimum_pixels_per_track, h);
 703 }
 704
 705
 706 void
 707 ContentTimeline::mouse_moved(wxMouseEvent& ev)
 708 {
 709         switch (_tool) {
 710         case SELECT:
 711                 mouse_moved_select (ev);
 712                 break;
 713         case ZOOM:
 714                 mouse_moved_zoom (ev);
 715                 break;
 716         case ZOOM_ALL:
 717         case SNAP:
 718         case SEQUENCE:
 719                 break;
 720         }
 721 }
 722
 723
 724 void
 725 ContentTimeline::mouse_moved_select(wxMouseEvent& ev)
 726 {
 727         if (!_left_down) {
 728                 return;
 729         }
 730
 731         set_position_from_event (ev);
 732 }
 733
 734
 735 void
 736 ContentTimeline::mouse_moved_zoom(wxMouseEvent& ev)
 737 {
 738         if (!_left_down) {
 739                 return;
 740         }
 741
 742         _zoom_point = ev.GetPosition ();
 743         setup_scrollbars();
 744         Refresh ();
 745 }
 746
 747
 748 void
 749 ContentTimeline::right_down(wxMouseEvent& ev)
 750 {
 751         switch (_tool) {
 752         case SELECT:
 753                 right_down_select (ev);
 754                 break;
 755         case ZOOM:
 756                 /* Zoom out */
 757                 set_pixels_per_second (*_pixels_per_second / 2);
 758                 set_pixels_per_track (_pixels_per_track / 2);
 759                 setup_scrollbars ();
 760                 Refresh ();
 761                 break;
 762         case ZOOM_ALL:
 763         case SNAP:
 764         case SEQUENCE:
 765                 break;
 766         }
 767 }
 768
 769
 770 void
 771 ContentTimeline::right_down_select(wxMouseEvent& ev)
 772 {
 773         auto view = event_to_view (ev);
 774         auto cv = dynamic_pointer_cast<TimelineContentView> (view);
 775         if (!cv) {
 776                 return;
 777         }
 778
 779         if (!cv->selected ()) {
 780                 clear_selection ();
 781                 cv->set_selected (true);
 782         }
 783
 784         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 785 }
 786
 787
 788 void
 789 ContentTimeline::maybe_snap(DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 790 {
 791         auto const d = a - b;
 792         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 793                 nearest_distance = d;
 794         }
 795 }
 796
 797
 798 void
 799 ContentTimeline::set_position_from_event(wxMouseEvent& ev, bool force_emit)
 800 {
 801         if (!_pixels_per_second) {
 802                 return;
 803         }
 804
 805         double const pps = _pixels_per_second.get ();
 806
 807         auto const p = ev.GetPosition();
 808
 809         if (!_first_move) {
 810                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 811                    before the drag is considered to have started.
 812                 */
 813                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 814                 if (dist < 8) {
 815                         return;
 816                 }
 817                 _first_move = true;
 818         }
 819
 820         if (!_down_view) {
 821                 return;
 822         }
 823
 824         auto new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 825
 826         auto film = _film.lock ();
 827         DCPOMATIC_ASSERT (film);
 828
 829         if (_snap) {
 830                 auto const new_end = new_position + _down_view->content()->length_after_trim(film);
 831                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 832                    positive is right).
 833                 */
 834                 optional<DCPTime> nearest_distance;
 835
 836                 /* Find the nearest snap point */
 837
 838                 for (auto i: _start_snaps) {
 839                         maybe_snap (i, new_position, nearest_distance);
 840                 }
 841
 842                 for (auto i: _end_snaps) {
 843                         maybe_snap (i, new_end, nearest_distance);
 844                 }
 845
 846                 if (nearest_distance) {
 847                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 848                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 849                                 new_position += nearest_distance.get ();
 850                         }
 851                 }
 852         }
 853
 854         if (new_position < DCPTime ()) {
 855                 new_position = DCPTime ();
 856         }
 857
 858         _down_view->content()->set_position (film, new_position, force_emit);
 859
 860         film->set_sequence (false);
 861 }
 862
 863
 864 void
 865 ContentTimeline::force_redraw(dcpomatic::Rect<int> const & r)
 866 {
 867         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 868 }
 869
 870
 871 shared_ptr<const Film>
 872 ContentTimeline::film() const
 873 {
 874         return _film.lock ();
 875 }
 876
 877
 878 void
 879 ContentTimeline::resized()
 880 {
 881         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 882                 zoom_all ();
 883                 _first_resize = false;
 884         }
 885         setup_scrollbars ();
 886 }
 887
 888
 889 void
 890 ContentTimeline::clear_selection()
 891 {
 892         for (auto i: _views) {
 893                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView>(i);
 894                 if (cv) {
 895                         cv->set_selected (false);
 896                 }
 897         }
 898 }
 899
 900
 901 TimelineContentViewList
 902 ContentTimeline::selected_views() const
 903 {
 904         TimelineContentViewList sel;
 905
 906         for (auto i: _views) {
 907                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 908                 if (cv && cv->selected()) {
 909                         sel.push_back (cv);
 910                 }
 911         }
 912
 913         return sel;
 914 }
 915
 916
 917 ContentList
 918 ContentTimeline::selected_content() const
 919 {
 920         ContentList sel;
 921
 922         for (auto i: selected_views()) {
 923                 sel.push_back(i->content());
 924         }
 925
 926         return sel;
 927 }
 928
 929
 930 void
 931 ContentTimeline::set_selection(ContentList selection)
 932 {
 933         for (auto i: _views) {
 934                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 935                 if (cv) {
 936                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 937                 }
 938         }
 939 }
 940
 941
 942 int
 943 ContentTimeline::tracks_y_offset() const
 944 {
 945         return _reels_view->bbox().height + 4;
 946 }
 947
 948
 949 int
 950 ContentTimeline::width() const
 951 {
 952         return _main_canvas->GetVirtualSize().GetWidth();
 953 }
 954
 955
 956 void
 957 ContentTimeline::scrolled(wxScrollWinEvent& ev)
 958 {
 959         if (ev.GetOrientation() == wxVERTICAL) {
 960                 int x, y;
 961                 _main_canvas->GetViewStart (&x, &y);
 962                 _labels_canvas->Scroll (0, y);
 963         }
 964         ev.Skip ();
 965 }
 966
 967
 968 void
 969 ContentTimeline::tool_clicked(Tool t)
 970 {
 971         switch (t) {
 972         case ZOOM:
 973         case SELECT:
 974                 _tool = t;
 975                 break;
 976         case ZOOM_ALL:
 977                 zoom_all ();
 978                 break;
 979         case SNAP:
 980         case SEQUENCE:
 981                 break;
 982         }
 983 }
 984
 985
 986 void
 987 ContentTimeline::zoom_all()
 988 {
 989         auto film = _film.lock ();
 990         DCPOMATIC_ASSERT (film);
 991         set_pixels_per_second((_main_canvas->GetSize().GetWidth() - 32) / std::max(1.0, film->length().seconds()));
 992         set_pixels_per_track((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / std::max(1, _tracks));
 993         setup_scrollbars ();
 994         _main_canvas->Scroll (0, 0);
 995         _labels_canvas->Scroll (0, 0);
 996         Refresh ();
 997 }
 998
 999
1000 void
1001 ContentTimeline::keypress(wxKeyEvent const& event)
1002 {
1003         if (event.GetKeyCode() == WXK_DELETE) {
1004                 auto film = _film.lock();
1005                 DCPOMATIC_ASSERT(film);
1006                 film->remove_content(selected_content());
1007         } else {
1008                 switch (event.GetRawKeyCode()) {
1009                 case '+':
1010                         set_pixels_per_second(_pixels_per_second.get_value_or(1) * 2);
1011                         setup_scrollbars();
1012                         break;
1013                 case '-':
1014                         set_pixels_per_second(_pixels_per_second.get_value_or(1) / 2);
1015                         setup_scrollbars();
1016                         break;
1017                 }
1018         }
1019 }
1020