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         auto const rotation = event.GetWheelRotation();
 140
 141         if (event.ControlDown()) {
 142                 /* On my mouse one click of the scroll wheel is 120, and it's -ve when
 143                  * scrolling the wheel towards me.
 144                  */
 145                 auto const scale = rotation > 0 ?
 146                         (1.0 / (rotation / 90.0)) :
 147                         (-rotation / 90.0);
 148
 149                 int before_start_x;
 150                 int before_start_y;
 151                 _main_canvas->GetViewStart(&before_start_x, &before_start_y);
 152
 153                 auto const before_pps = _pixels_per_second.get_value_or(1);
 154                 auto const before_pos = _last_mouse_wheel_x && *_last_mouse_wheel_x == event.GetX() ?
 155                         *_last_mouse_wheel_time :
 156                         (before_start_x * _x_scroll_rate + event.GetX()) / before_pps;
 157
 158                 set_pixels_per_second(before_pps * scale);
 159                 setup_scrollbars();
 160
 161                 auto after_left = std::max(0.0, before_pos * _pixels_per_second.get_value_or(1) - event.GetX());
 162                 _main_canvas->Scroll(after_left / _x_scroll_rate, before_start_y);
 163                 _labels_canvas->Scroll(0, before_start_y);
 164                 Refresh();
 165
 166                 if (!_last_mouse_wheel_x || *_last_mouse_wheel_x != event.GetX()) {
 167                         _last_mouse_wheel_x = event.GetX();
 168                         _last_mouse_wheel_time = before_pos;
 169                 }
 170         } else if (event.ShiftDown()) {
 171                 int before_start_x;
 172                 int before_start_y;
 173                 _main_canvas->GetViewStart(&before_start_x, &before_start_y);
 174                 auto const width = _main_canvas->GetSize().GetWidth();
 175                 _main_canvas->Scroll(std::max(0.0, before_start_x - rotation * 100.0 / width), before_start_y);
 176         }
 177 }
 178
 179
 180 void
 181 Timeline::update_playhead ()
 182 {
 183         Refresh ();
 184 }
 185
 186
 187 void
 188 Timeline::set_pixels_per_second (double pps)
 189 {
 190         _pixels_per_second = max (_minimum_pixels_per_second, pps);
 191 }
 192
 193
 194 void
 195 Timeline::paint_labels ()
 196 {
 197         wxPaintDC dc (_labels_canvas);
 198
 199         auto film = _film.lock();
 200         if (film->content().empty()) {
 201                 return;
 202         }
 203
 204         auto gc = wxGraphicsContext::Create (dc);
 205         if (!gc) {
 206                 return;
 207         }
 208
 209         dcp::ScopeGuard sg = [gc]() { delete gc; };
 210
 211         int vsx, vsy;
 212         _labels_canvas->GetViewStart (&vsx, &vsy);
 213         gc->Translate (-vsx * _x_scroll_rate, -vsy * _y_scroll_rate + tracks_y_offset());
 214
 215         _labels_view->paint (gc, {});
 216 }
 217
 218
 219 void
 220 Timeline::paint_main ()
 221 {
 222         wxPaintDC dc (_main_canvas);
 223         dc.Clear();
 224
 225         auto film = _film.lock();
 226         if (film->content().empty()) {
 227                 return;
 228         }
 229
 230         _main_canvas->DoPrepareDC (dc);
 231
 232         auto gc = wxGraphicsContext::Create (dc);
 233         if (!gc) {
 234                 return;
 235         }
 236
 237         dcp::ScopeGuard sg = [gc]() { delete gc; };
 238
 239         gc->SetAntialiasMode (wxANTIALIAS_DEFAULT);
 240
 241         for (auto i: _views) {
 242
 243                 auto ic = dynamic_pointer_cast<TimelineContentView> (i);
 244
 245                 /* Find areas of overlap with other content views, so that we can plot them */
 246                 list<dcpomatic::Rect<int>> overlaps;
 247                 for (auto j: _views) {
 248                         auto jc = dynamic_pointer_cast<TimelineContentView> (j);
 249                         /* No overlap with non-content views, views on different tracks, audio views or non-active views */
 250                         if (!ic || !jc || i == j || ic->track() != jc->track() || ic->track().get_value_or(2) >= 2 || !ic->active() || !jc->active()) {
 251                                 continue;
 252                         }
 253
 254                         auto r = j->bbox().intersection(i->bbox());
 255                         if (r) {
 256                                 overlaps.push_back (r.get ());
 257                         }
 258                 }
 259
 260                 i->paint (gc, overlaps);
 261         }
 262
 263         if (_zoom_point) {
 264                 gc->SetPen(gui_is_dark() ? *wxWHITE_PEN : *wxBLACK_PEN);
 265                 gc->SetBrush (*wxTRANSPARENT_BRUSH);
 266                 gc->DrawRectangle (
 267                         min (_down_point.x, _zoom_point->x),
 268                         min (_down_point.y, _zoom_point->y),
 269                         abs (_down_point.x - _zoom_point->x),
 270                         abs (_down_point.y - _zoom_point->y)
 271                         );
 272         }
 273
 274         /* Playhead */
 275
 276         gc->SetPen (*wxRED_PEN);
 277         auto path = gc->CreatePath ();
 278         double const ph = _viewer.position().seconds() * pixels_per_second().get_value_or(0);
 279         path.MoveToPoint (ph, 0);
 280         path.AddLineToPoint (ph, pixels_per_track() * _tracks + 32);
 281         gc->StrokePath (path);
 282 }
 283
 284
 285 void
 286 Timeline::film_change(ChangeType type, FilmProperty p)
 287 {
 288         if (type != ChangeType::DONE) {
 289                 return;
 290         }
 291
 292         if (p == FilmProperty::CONTENT || p == FilmProperty::REEL_TYPE || p == FilmProperty::REEL_LENGTH) {
 293                 ensure_ui_thread ();
 294                 recreate_views ();
 295         } else if (p == FilmProperty::CONTENT_ORDER) {
 296                 Refresh ();
 297         }
 298 }
 299
 300
 301 void
 302 Timeline::recreate_views ()
 303 {
 304         auto film = _film.lock ();
 305         if (!film) {
 306                 return;
 307         }
 308
 309         _views.clear ();
 310         _views.push_back (_time_axis_view);
 311         _views.push_back (_reels_view);
 312
 313         for (auto i: film->content ()) {
 314                 if (i->video) {
 315                         _views.push_back (make_shared<TimelineVideoContentView>(*this, i));
 316                 }
 317
 318                 if (i->audio && !i->audio->mapping().mapped_output_channels().empty ()) {
 319                         _views.push_back (make_shared<TimelineAudioContentView>(*this, i));
 320                 }
 321
 322                 for (auto j: i->text) {
 323                         _views.push_back (make_shared<TimelineTextContentView>(*this, i, j));
 324                 }
 325
 326                 if (i->atmos) {
 327                         _views.push_back (make_shared<TimelineAtmosContentView>(*this, i));
 328                 }
 329         }
 330
 331         assign_tracks ();
 332         setup_scrollbars ();
 333         Refresh ();
 334 }
 335
 336
 337 void
 338 Timeline::film_content_change (ChangeType type, int property, bool frequent)
 339 {
 340         if (type != ChangeType::DONE) {
 341                 return;
 342         }
 343
 344         ensure_ui_thread ();
 345
 346         if (property == AudioContentProperty::STREAMS || property == VideoContentProperty::FRAME_TYPE) {
 347                 recreate_views ();
 348         } else if (property == ContentProperty::POSITION || property == ContentProperty::LENGTH) {
 349                 _reels_view->force_redraw ();
 350         } else if (!frequent) {
 351                 setup_scrollbars ();
 352                 Refresh ();
 353         }
 354 }
 355
 356
 357 template <class T>
 358 int
 359 place (shared_ptr<const Film> film, TimelineViewList& views, int& tracks)
 360 {
 361         int const base = tracks;
 362
 363         for (auto i: views) {
 364                 if (!dynamic_pointer_cast<T>(i)) {
 365                         continue;
 366                 }
 367
 368                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 369                 DCPOMATIC_ASSERT(cv);
 370
 371                 int t = base;
 372
 373                 auto content = cv->content();
 374                 DCPTimePeriod const content_period = content->period(film);
 375
 376                 while (true) {
 377                         auto j = views.begin();
 378                         while (j != views.end()) {
 379                                 auto test = dynamic_pointer_cast<T> (*j);
 380                                 if (!test) {
 381                                         ++j;
 382                                         continue;
 383                                 }
 384
 385                                 auto test_content = test->content();
 386                                 if (
 387                                         test->track() && test->track().get() == t &&
 388                                         content_period.overlap(test_content->period(film))
 389                                    ) {
 390                                         /* we have an overlap on track `t' */
 391                                         ++t;
 392                                         break;
 393                                 }
 394
 395                                 ++j;
 396                         }
 397
 398                         if (j == views.end ()) {
 399                                 /* no overlap on `t' */
 400                                 break;
 401                         }
 402                 }
 403
 404                 cv->set_track (t);
 405                 tracks = max (tracks, t + 1);
 406         }
 407
 408         return tracks - base;
 409 }
 410
 411
 412 /** Compare the mapped output channels of two TimelineViews, so we can into
 413  *  order of first mapped DCP channel.
 414  */
 415 struct AudioMappingComparator {
 416         bool operator()(shared_ptr<TimelineView> a, shared_ptr<TimelineView> b) {
 417                 int la = -1;
 418                 auto cva = dynamic_pointer_cast<TimelineAudioContentView>(a);
 419                 if (cva) {
 420                         auto oc = cva->content()->audio->mapping().mapped_output_channels();
 421                         la = *min_element(boost::begin(oc), boost::end(oc));
 422                 }
 423                 int lb = -1;
 424                 auto cvb = dynamic_pointer_cast<TimelineAudioContentView>(b);
 425                 if (cvb) {
 426                         auto oc = cvb->content()->audio->mapping().mapped_output_channels();
 427                         lb = *min_element(boost::begin(oc), boost::end(oc));
 428                 }
 429                 return la < lb;
 430         }
 431 };
 432
 433
 434 void
 435 Timeline::assign_tracks ()
 436 {
 437         /* Tracks are:
 438            Video 1
 439            Video 2
 440            Video N
 441            Text 1
 442            Text 2
 443            Text N
 444            Atmos
 445            Audio 1
 446            Audio 2
 447            Audio N
 448         */
 449
 450         auto film = _film.lock ();
 451         DCPOMATIC_ASSERT (film);
 452
 453         _tracks = 0;
 454
 455         for (auto i: _views) {
 456                 auto c = dynamic_pointer_cast<TimelineContentView>(i);
 457                 if (c) {
 458                         c->unset_track ();
 459                 }
 460         }
 461
 462         int const video_tracks = place<TimelineVideoContentView> (film, _views, _tracks);
 463         int const text_tracks = place<TimelineTextContentView> (film, _views, _tracks);
 464
 465         /* Atmos */
 466
 467         bool have_atmos = false;
 468         for (auto i: _views) {
 469                 auto cv = dynamic_pointer_cast<TimelineAtmosContentView>(i);
 470                 if (cv) {
 471                         cv->set_track (_tracks);
 472                         have_atmos = true;
 473                 }
 474         }
 475
 476         if (have_atmos) {
 477                 ++_tracks;
 478         }
 479
 480         /* Audio.  We're sorting the views so that we get the audio views in order of increasing
 481            DCP channel index.
 482         */
 483
 484         auto views = _views;
 485         sort(views.begin(), views.end(), AudioMappingComparator());
 486         int const audio_tracks = place<TimelineAudioContentView> (film, views, _tracks);
 487
 488         _labels_view->set_video_tracks (video_tracks);
 489         _labels_view->set_audio_tracks (audio_tracks);
 490         _labels_view->set_text_tracks (text_tracks);
 491         _labels_view->set_atmos (have_atmos);
 492
 493         _time_axis_view->set_y (tracks());
 494         _reels_view->set_y (8);
 495 }
 496
 497
 498 int
 499 Timeline::tracks () const
 500 {
 501         return _tracks;
 502 }
 503
 504
 505 void
 506 Timeline::setup_scrollbars ()
 507 {
 508         auto film = _film.lock ();
 509         if (!film || !_pixels_per_second) {
 510                 return;
 511         }
 512
 513         int const h = tracks() * pixels_per_track() + tracks_y_offset() + _time_axis_view->bbox().height;
 514
 515         _labels_canvas->SetVirtualSize (_labels_view->bbox().width, h);
 516         _labels_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 517         _main_canvas->SetVirtualSize (*_pixels_per_second * film->length().seconds(), h);
 518         _main_canvas->SetScrollRate (_x_scroll_rate, _y_scroll_rate);
 519 }
 520
 521
 522 shared_ptr<TimelineView>
 523 Timeline::event_to_view (wxMouseEvent& ev)
 524 {
 525         /* Search backwards through views so that we find the uppermost one first */
 526         auto i = _views.rbegin();
 527
 528         int vsx, vsy;
 529         _main_canvas->GetViewStart (&vsx, &vsy);
 530         Position<int> const p (ev.GetX() + vsx * _x_scroll_rate, ev.GetY() + vsy * _y_scroll_rate);
 531
 532         while (i != _views.rend() && !(*i)->bbox().contains (p)) {
 533                 ++i;
 534         }
 535
 536         if (i == _views.rend ()) {
 537                 return {};
 538         }
 539
 540         return *i;
 541 }
 542
 543
 544 void
 545 Timeline::left_down (wxMouseEvent& ev)
 546 {
 547         _left_down = true;
 548         _down_point = ev.GetPosition ();
 549
 550         switch (_tool) {
 551         case SELECT:
 552                 left_down_select (ev);
 553                 break;
 554         case ZOOM:
 555         case ZOOM_ALL:
 556         case SNAP:
 557         case SEQUENCE:
 558                 /* Nothing to do */
 559                 break;
 560         }
 561 }
 562
 563
 564 void
 565 Timeline::left_down_select (wxMouseEvent& ev)
 566 {
 567         auto view = event_to_view (ev);
 568         auto content_view = dynamic_pointer_cast<TimelineContentView>(view);
 569
 570         _down_view.reset ();
 571
 572         if (content_view) {
 573                 _down_view = content_view;
 574                 _down_view_position = content_view->content()->position ();
 575         }
 576
 577         if (dynamic_pointer_cast<TimelineTimeAxisView>(view)) {
 578                 int vsx, vsy;
 579                 _main_canvas->GetViewStart(&vsx, &vsy);
 580                 _viewer.seek(DCPTime::from_seconds((ev.GetPosition().x + vsx * _x_scroll_rate) / _pixels_per_second.get_value_or(1)), true);
 581         }
 582
 583         for (auto i: _views) {
 584                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 585                 if (!cv) {
 586                         continue;
 587                 }
 588
 589                 if (!ev.ShiftDown ()) {
 590                         cv->set_selected (view == i);
 591                 }
 592         }
 593
 594         if (content_view && ev.ShiftDown ()) {
 595                 content_view->set_selected (!content_view->selected ());
 596         }
 597
 598         _first_move = false;
 599
 600         if (_down_view) {
 601                 /* Pre-compute the points that we might snap to */
 602                 for (auto i: _views) {
 603                         auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 604                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 605                                 continue;
 606                         }
 607
 608                         auto film = _film.lock ();
 609                         DCPOMATIC_ASSERT (film);
 610
 611                         _start_snaps.push_back (cv->content()->position());
 612                         _end_snaps.push_back (cv->content()->position());
 613                         _start_snaps.push_back (cv->content()->end(film));
 614                         _end_snaps.push_back (cv->content()->end(film));
 615
 616                         for (auto i: cv->content()->reel_split_points(film)) {
 617                                 _start_snaps.push_back (i);
 618                         }
 619                 }
 620
 621                 /* Tell everyone that things might change frequently during the drag */
 622                 _down_view->content()->set_change_signals_frequent (true);
 623         }
 624 }
 625
 626
 627 void
 628 Timeline::left_up (wxMouseEvent& ev)
 629 {
 630         _left_down = false;
 631
 632         switch (_tool) {
 633         case SELECT:
 634                 left_up_select (ev);
 635                 break;
 636         case ZOOM:
 637                 left_up_zoom (ev);
 638                 break;
 639         case ZOOM_ALL:
 640         case SNAP:
 641         case SEQUENCE:
 642                 break;
 643         }
 644 }
 645
 646
 647 void
 648 Timeline::left_up_select (wxMouseEvent& ev)
 649 {
 650         if (_down_view) {
 651                 _down_view->content()->set_change_signals_frequent (false);
 652         }
 653
 654         _content_panel->set_selection (selected_content ());
 655         /* Since we may have just set change signals back to `not-frequent', we have to
 656            make sure this position change is signalled, even if the position value has
 657            not changed since the last time it was set (with frequent=true).  This is
 658            a bit of a hack.
 659         */
 660         set_position_from_event (ev, true);
 661
 662         /* Clear up up the stuff we don't do during drag */
 663         assign_tracks ();
 664         setup_scrollbars ();
 665         Refresh ();
 666
 667         _start_snaps.clear ();
 668         _end_snaps.clear ();
 669 }
 670
 671
 672 void
 673 Timeline::left_up_zoom (wxMouseEvent& ev)
 674 {
 675         _zoom_point = ev.GetPosition ();
 676
 677         int vsx, vsy;
 678         _main_canvas->GetViewStart (&vsx, &vsy);
 679
 680         wxPoint top_left(min(_down_point.x, _zoom_point->x), min(_down_point.y, _zoom_point->y));
 681         wxPoint bottom_right(max(_down_point.x, _zoom_point->x), max(_down_point.y, _zoom_point->y));
 682
 683         if ((bottom_right.x - top_left.x) < 8 || (bottom_right.y - top_left.y) < 8) {
 684                 /* Very small zoom rectangle: we assume it wasn't intentional */
 685                 _zoom_point = optional<wxPoint> ();
 686                 Refresh ();
 687                 return;
 688         }
 689
 690         auto const time_left = DCPTime::from_seconds((top_left.x + vsx) / *_pixels_per_second);
 691         auto const time_right = DCPTime::from_seconds((bottom_right.x + vsx) / *_pixels_per_second);
 692         set_pixels_per_second (double(GetSize().GetWidth()) / (time_right.seconds() - time_left.seconds()));
 693
 694         double const tracks_top = double(top_left.y - tracks_y_offset()) / _pixels_per_track;
 695         double const tracks_bottom = double(bottom_right.y - tracks_y_offset()) / _pixels_per_track;
 696         set_pixels_per_track (lrint(GetSize().GetHeight() / (tracks_bottom - tracks_top)));
 697
 698         setup_scrollbars ();
 699         int const y = (tracks_top * _pixels_per_track + tracks_y_offset()) / _y_scroll_rate;
 700         _main_canvas->Scroll (time_left.seconds() * *_pixels_per_second / _x_scroll_rate, y);
 701         _labels_canvas->Scroll (0, y);
 702
 703         _zoom_point = optional<wxPoint> ();
 704         Refresh ();
 705 }
 706
 707
 708 void
 709 Timeline::set_pixels_per_track (int h)
 710 {
 711         _pixels_per_track = max(_minimum_pixels_per_track, h);
 712 }
 713
 714
 715 void
 716 Timeline::mouse_moved (wxMouseEvent& ev)
 717 {
 718         switch (_tool) {
 719         case SELECT:
 720                 mouse_moved_select (ev);
 721                 break;
 722         case ZOOM:
 723                 mouse_moved_zoom (ev);
 724                 break;
 725         case ZOOM_ALL:
 726         case SNAP:
 727         case SEQUENCE:
 728                 break;
 729         }
 730 }
 731
 732
 733 void
 734 Timeline::mouse_moved_select (wxMouseEvent& ev)
 735 {
 736         if (!_left_down) {
 737                 return;
 738         }
 739
 740         set_position_from_event (ev);
 741 }
 742
 743
 744 void
 745 Timeline::mouse_moved_zoom (wxMouseEvent& ev)
 746 {
 747         if (!_left_down) {
 748                 return;
 749         }
 750
 751         _zoom_point = ev.GetPosition ();
 752         setup_scrollbars();
 753         Refresh ();
 754 }
 755
 756
 757 void
 758 Timeline::right_down (wxMouseEvent& ev)
 759 {
 760         switch (_tool) {
 761         case SELECT:
 762                 right_down_select (ev);
 763                 break;
 764         case ZOOM:
 765                 /* Zoom out */
 766                 set_pixels_per_second (*_pixels_per_second / 2);
 767                 set_pixels_per_track (_pixels_per_track / 2);
 768                 setup_scrollbars ();
 769                 Refresh ();
 770                 break;
 771         case ZOOM_ALL:
 772         case SNAP:
 773         case SEQUENCE:
 774                 break;
 775         }
 776 }
 777
 778
 779 void
 780 Timeline::right_down_select (wxMouseEvent& ev)
 781 {
 782         auto view = event_to_view (ev);
 783         auto cv = dynamic_pointer_cast<TimelineContentView> (view);
 784         if (!cv) {
 785                 return;
 786         }
 787
 788         if (!cv->selected ()) {
 789                 clear_selection ();
 790                 cv->set_selected (true);
 791         }
 792
 793         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 794 }
 795
 796
 797 void
 798 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 799 {
 800         auto const d = a - b;
 801         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 802                 nearest_distance = d;
 803         }
 804 }
 805
 806
 807 void
 808 Timeline::set_position_from_event (wxMouseEvent& ev, bool force_emit)
 809 {
 810         if (!_pixels_per_second) {
 811                 return;
 812         }
 813
 814         double const pps = _pixels_per_second.get ();
 815
 816         auto const p = ev.GetPosition();
 817
 818         if (!_first_move) {
 819                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 820                    before the drag is considered to have started.
 821                 */
 822                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 823                 if (dist < 8) {
 824                         return;
 825                 }
 826                 _first_move = true;
 827         }
 828
 829         if (!_down_view) {
 830                 return;
 831         }
 832
 833         auto new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 834
 835         auto film = _film.lock ();
 836         DCPOMATIC_ASSERT (film);
 837
 838         if (_snap) {
 839                 auto const new_end = new_position + _down_view->content()->length_after_trim(film);
 840                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 841                    positive is right).
 842                 */
 843                 optional<DCPTime> nearest_distance;
 844
 845                 /* Find the nearest snap point */
 846
 847                 for (auto i: _start_snaps) {
 848                         maybe_snap (i, new_position, nearest_distance);
 849                 }
 850
 851                 for (auto i: _end_snaps) {
 852                         maybe_snap (i, new_end, nearest_distance);
 853                 }
 854
 855                 if (nearest_distance) {
 856                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 857                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 858                                 new_position += nearest_distance.get ();
 859                         }
 860                 }
 861         }
 862
 863         if (new_position < DCPTime ()) {
 864                 new_position = DCPTime ();
 865         }
 866
 867         _down_view->content()->set_position (film, new_position, force_emit);
 868
 869         film->set_sequence (false);
 870 }
 871
 872
 873 void
 874 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 875 {
 876         _main_canvas->RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 877 }
 878
 879
 880 shared_ptr<const Film>
 881 Timeline::film () const
 882 {
 883         return _film.lock ();
 884 }
 885
 886
 887 void
 888 Timeline::resized ()
 889 {
 890         if (_main_canvas->GetSize().GetWidth() > 0 && _first_resize) {
 891                 zoom_all ();
 892                 _first_resize = false;
 893         }
 894         setup_scrollbars ();
 895 }
 896
 897
 898 void
 899 Timeline::clear_selection ()
 900 {
 901         for (auto i: _views) {
 902                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView>(i);
 903                 if (cv) {
 904                         cv->set_selected (false);
 905                 }
 906         }
 907 }
 908
 909
 910 TimelineContentViewList
 911 Timeline::selected_views () const
 912 {
 913         TimelineContentViewList sel;
 914
 915         for (auto i: _views) {
 916                 auto cv = dynamic_pointer_cast<TimelineContentView>(i);
 917                 if (cv && cv->selected()) {
 918                         sel.push_back (cv);
 919                 }
 920         }
 921
 922         return sel;
 923 }
 924
 925
 926 ContentList
 927 Timeline::selected_content () const
 928 {
 929         ContentList sel;
 930
 931         for (auto i: selected_views()) {
 932                 sel.push_back(i->content());
 933         }
 934
 935         return sel;
 936 }
 937
 938
 939 void
 940 Timeline::set_selection (ContentList selection)
 941 {
 942         for (auto i: _views) {
 943                 auto cv = dynamic_pointer_cast<TimelineContentView> (i);
 944                 if (cv) {
 945                         cv->set_selected (find (selection.begin(), selection.end(), cv->content ()) != selection.end ());
 946                 }
 947         }
 948 }
 949
 950
 951 int
 952 Timeline::tracks_y_offset () const
 953 {
 954         return _reels_view->bbox().height + 4;
 955 }
 956
 957
 958 int
 959 Timeline::width () const
 960 {
 961         return _main_canvas->GetVirtualSize().GetWidth();
 962 }
 963
 964
 965 void
 966 Timeline::scrolled (wxScrollWinEvent& ev)
 967 {
 968         if (ev.GetOrientation() == wxVERTICAL) {
 969                 int x, y;
 970                 _main_canvas->GetViewStart (&x, &y);
 971                 _labels_canvas->Scroll (0, y);
 972         }
 973         ev.Skip ();
 974 }
 975
 976
 977 void
 978 Timeline::tool_clicked (Tool t)
 979 {
 980         switch (t) {
 981         case ZOOM:
 982         case SELECT:
 983                 _tool = t;
 984                 break;
 985         case ZOOM_ALL:
 986                 zoom_all ();
 987                 break;
 988         case SNAP:
 989         case SEQUENCE:
 990                 break;
 991         }
 992 }
 993
 994
 995 void
 996 Timeline::zoom_all ()
 997 {
 998         auto film = _film.lock ();
 999         DCPOMATIC_ASSERT (film);
1000         set_pixels_per_second((_main_canvas->GetSize().GetWidth() - 32) / std::max(1.0, film->length().seconds()));
1001         set_pixels_per_track((_main_canvas->GetSize().GetHeight() - tracks_y_offset() - _time_axis_view->bbox().height - 32) / std::max(1, _tracks));
1002         setup_scrollbars ();
1003         _main_canvas->Scroll (0, 0);
1004         _labels_canvas->Scroll (0, 0);
1005         Refresh ();
1006 }
1007
1008
1009 void
1010 Timeline::keypress(wxKeyEvent const& event)
1011 {
1012         if (event.GetKeyCode() == WXK_DELETE) {
1013                 auto film = _film.lock();
1014                 DCPOMATIC_ASSERT(film);
1015                 film->remove_content(selected_content());
1016         } else {
1017                 switch (event.GetRawKeyCode()) {
1018                 case '+':
1019                         set_pixels_per_second(_pixels_per_second.get_value_or(1) * 2);
1020                         setup_scrollbars();
1021                         break;
1022                 case '-':
1023                         set_pixels_per_second(_pixels_per_second.get_value_or(1) / 2);
1024                         setup_scrollbars();
1025                         break;
1026                 }
1027         }
1028 }
1029