src/wx/timeline.cc

   1 /*
   2     Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include "film_editor.h"
  21 #include "timeline.h"
  22 #include "timeline_time_axis_view.h"
  23 #include "timeline_video_content_view.h"
  24 #include "timeline_audio_content_view.h"
  25 #include "timeline_subtitle_content_view.h"
  26 #include "content_panel.h"
  27 #include "wx_util.h"
  28 #include "lib/film.h"
  29 #include "lib/playlist.h"
  30 #include "lib/image_content.h"
  31 #include "lib/audio_content.h"
  32 #include "lib/subtitle_content.h"
  33 #include <wx/graphics.h>
  34 #include <boost/weak_ptr.hpp>
  35 #include <boost/foreach.hpp>
  36 #include <list>
  37 #include <iostream>
  38
  39 using std::list;
  40 using std::cout;
  41 using std::max;
  42 using boost::shared_ptr;
  43 using boost::weak_ptr;
  44 using boost::dynamic_pointer_cast;
  45 using boost::bind;
  46 using boost::optional;
  47
  48 Timeline::Timeline (wxWindow* parent, ContentPanel* cp, shared_ptr<Film> film)
  49         : wxPanel (parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE)
  50         , _content_panel (cp)
  51         , _film (film)
  52         , _time_axis_view (new TimelineTimeAxisView (*this, 32))
  53         , _tracks (0)
  54         , _left_down (false)
  55         , _down_view_position (0)
  56         , _first_move (false)
  57         , _menu (this)
  58         , _snap (true)
  59 {
  60 #ifndef __WXOSX__
  61         SetDoubleBuffered (true);
  62 #endif
  63
  64         Bind (wxEVT_PAINT,      boost::bind (&Timeline::paint,       this));
  65         Bind (wxEVT_LEFT_DOWN,  boost::bind (&Timeline::left_down,   this, _1));
  66         Bind (wxEVT_LEFT_UP,    boost::bind (&Timeline::left_up,     this, _1));
  67         Bind (wxEVT_RIGHT_DOWN, boost::bind (&Timeline::right_down,  this, _1));
  68         Bind (wxEVT_MOTION,     boost::bind (&Timeline::mouse_moved, this, _1));
  69         Bind (wxEVT_SIZE,       boost::bind (&Timeline::resized,     this));
  70
  71         film_changed (Film::CONTENT);
  72
  73         SetMinSize (wxSize (640, tracks() * track_height() + 96));
  74
  75         _film_changed_connection = film->Changed.connect (bind (&Timeline::film_changed, this, _1));
  76         _film_content_changed_connection = film->ContentChanged.connect (bind (&Timeline::film_content_changed, this, _2));
  77 }
  78
  79 void
  80 Timeline::paint ()
  81 {
  82         wxPaintDC dc (this);
  83
  84         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
  85         if (!gc) {
  86                 return;
  87         }
  88
  89         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
  90                 (*i)->paint (gc);
  91         }
  92
  93         delete gc;
  94 }
  95
  96 void
  97 Timeline::film_changed (Film::Property p)
  98 {
  99         if (p == Film::CONTENT) {
 100                 ensure_ui_thread ();
 101                 recreate_views ();
 102         }
 103 }
 104
 105 void
 106 Timeline::recreate_views ()
 107 {
 108         shared_ptr<const Film> film = _film.lock ();
 109         if (!film) {
 110                 return;
 111         }
 112
 113         _views.clear ();
 114         _views.push_back (_time_axis_view);
 115
 116         BOOST_FOREACH (shared_ptr<Content> i, film->content ()) {
 117                 if (dynamic_pointer_cast<VideoContent> (i)) {
 118                         _views.push_back (shared_ptr<TimelineView> (new TimelineVideoContentView (*this, i)));
 119                 }
 120
 121                 shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> (i);
 122                 if (ac && !ac->audio_mapping().mapped_output_channels().empty ()) {
 123                         _views.push_back (shared_ptr<TimelineView> (new TimelineAudioContentView (*this, i)));
 124                 }
 125
 126                 shared_ptr<SubtitleContent> sc = dynamic_pointer_cast<SubtitleContent> (i);
 127                 if (sc && sc->has_subtitles ()) {
 128                         _views.push_back (shared_ptr<TimelineView> (new TimelineSubtitleContentView (*this, sc)));
 129                 }
 130         }
 131
 132         assign_tracks ();
 133         setup_pixels_per_second ();
 134         Refresh ();
 135 }
 136
 137 void
 138 Timeline::film_content_changed (int property)
 139 {
 140         ensure_ui_thread ();
 141
 142         if (property == ContentProperty::POSITION) {
 143                 assign_tracks ();
 144                 if (!_left_down) {
 145                         /* Only do this if we are not dragging, as it's confusing otherwise */
 146                         setup_pixels_per_second ();
 147                 }
 148                 Refresh ();
 149         } else if (property == AudioContentProperty::AUDIO_STREAMS) {
 150                 recreate_views ();
 151         }
 152 }
 153
 154 void
 155 Timeline::assign_tracks ()
 156 {
 157         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 158                 shared_ptr<TimelineContentView> c = dynamic_pointer_cast<TimelineContentView> (*i);
 159                 if (c) {
 160                         c->unset_track ();
 161                 }
 162         }
 163
 164         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 165                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 166                 if (!cv) {
 167                         continue;
 168                 }
 169
 170                 shared_ptr<Content> content = cv->content();
 171                 DCPTimePeriod content_period (content->position(), content->end());
 172
 173                 int t = 0;
 174                 while (true) {
 175                         TimelineViewList::iterator j = _views.begin();
 176                         while (j != _views.end()) {
 177                                 shared_ptr<TimelineContentView> test = dynamic_pointer_cast<TimelineContentView> (*j);
 178                                 if (!test) {
 179                                         ++j;
 180                                         continue;
 181                                 }
 182
 183                                 shared_ptr<Content> test_content = test->content();
 184
 185                                 if (test && test->track() && test->track().get() == t) {
 186                                         if (content_period.overlaps (DCPTimePeriod(test_content->position(), test_content->end()))) {
 187                                                 /* we have an overlap on track `t' */
 188                                                 ++t;
 189                                                 break;
 190                                         }
 191                                 }
 192
 193                                 ++j;
 194                         }
 195
 196                         if (j == _views.end ()) {
 197                                 /* no overlap on `t' */
 198                                 break;
 199                         }
 200                 }
 201
 202                 cv->set_track (t);
 203                 _tracks = max (_tracks, t + 1);
 204         }
 205
 206         _time_axis_view->set_y (tracks() * track_height() + 32);
 207 }
 208
 209 int
 210 Timeline::tracks () const
 211 {
 212         return _tracks;
 213 }
 214
 215 void
 216 Timeline::setup_pixels_per_second ()
 217 {
 218         shared_ptr<const Film> film = _film.lock ();
 219         if (!film || film->length() == DCPTime ()) {
 220                 return;
 221         }
 222
 223         _pixels_per_second = static_cast<double>(width() - x_offset() * 2) / film->length().seconds ();
 224 }
 225
 226 shared_ptr<TimelineView>
 227 Timeline::event_to_view (wxMouseEvent& ev)
 228 {
 229         TimelineViewList::iterator i = _views.begin();
 230         Position<int> const p (ev.GetX(), ev.GetY());
 231         while (i != _views.end() && !(*i)->bbox().contains (p)) {
 232                 ++i;
 233         }
 234
 235         if (i == _views.end ()) {
 236                 return shared_ptr<TimelineView> ();
 237         }
 238
 239         return *i;
 240 }
 241
 242 void
 243 Timeline::left_down (wxMouseEvent& ev)
 244 {
 245         shared_ptr<TimelineView> view = event_to_view (ev);
 246         shared_ptr<TimelineContentView> content_view = dynamic_pointer_cast<TimelineContentView> (view);
 247
 248         _down_view.reset ();
 249
 250         if (content_view) {
 251                 _down_view = content_view;
 252                 _down_view_position = content_view->content()->position ();
 253         }
 254
 255         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 256                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 257                 if (!cv) {
 258                         continue;
 259                 }
 260
 261                 if (!ev.ShiftDown ()) {
 262                         cv->set_selected (view == *i);
 263                 }
 264
 265                 if (view == *i) {
 266                         _content_panel->set_selection (cv->content ());
 267                 }
 268         }
 269
 270         if (content_view && ev.ShiftDown ()) {
 271                 content_view->set_selected (!content_view->selected ());
 272         }
 273
 274         _left_down = true;
 275         _down_point = ev.GetPosition ();
 276         _first_move = false;
 277
 278         if (_down_view) {
 279                 _down_view->content()->set_change_signals_frequent (true);
 280         }
 281 }
 282
 283 void
 284 Timeline::left_up (wxMouseEvent& ev)
 285 {
 286         _left_down = false;
 287
 288         if (_down_view) {
 289                 _down_view->content()->set_change_signals_frequent (false);
 290         }
 291
 292         set_position_from_event (ev);
 293
 294         /* We don't do this during drag, and set_position_from_event above
 295            might not have changed the position, so do it now.
 296         */
 297         setup_pixels_per_second ();
 298         Refresh ();
 299 }
 300
 301 void
 302 Timeline::mouse_moved (wxMouseEvent& ev)
 303 {
 304         if (!_left_down) {
 305                 return;
 306         }
 307
 308         set_position_from_event (ev);
 309 }
 310
 311 void
 312 Timeline::right_down (wxMouseEvent& ev)
 313 {
 314         shared_ptr<TimelineView> view = event_to_view (ev);
 315         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (view);
 316         if (!cv) {
 317                 return;
 318         }
 319
 320         if (!cv->selected ()) {
 321                 clear_selection ();
 322                 cv->set_selected (true);
 323         }
 324
 325         _menu.popup (_film, selected_content (), selected_views (), ev.GetPosition ());
 326 }
 327
 328 void
 329 Timeline::maybe_snap (DCPTime a, DCPTime b, optional<DCPTime>& nearest_distance) const
 330 {
 331         DCPTime const d = a - b;
 332         if (!nearest_distance || d.abs() < nearest_distance.get().abs()) {
 333                 nearest_distance = d;
 334         }
 335 }
 336
 337 void
 338 Timeline::set_position_from_event (wxMouseEvent& ev)
 339 {
 340         if (!_pixels_per_second) {
 341                 return;
 342         }
 343
 344         double const pps = _pixels_per_second.get ();
 345
 346         wxPoint const p = ev.GetPosition();
 347
 348         if (!_first_move) {
 349                 /* We haven't moved yet; in that case, we must move the mouse some reasonable distance
 350                    before the drag is considered to have started.
 351                 */
 352                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 353                 if (dist < 8) {
 354                         return;
 355                 }
 356                 _first_move = true;
 357         }
 358
 359         if (!_down_view) {
 360                 return;
 361         }
 362
 363         DCPTime new_position = _down_view_position + DCPTime::from_seconds ((p.x - _down_point.x) / pps);
 364
 365         if (_snap) {
 366
 367                 DCPTime const new_end = new_position + _down_view->content()->length_after_trim();
 368                 /* Signed `distance' to nearest thing (i.e. negative is left on the timeline,
 369                    positive is right).
 370                 */
 371                 optional<DCPTime> nearest_distance;
 372
 373                 /* Find the nearest content edge; this is inefficient */
 374                 for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 375                         shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 376                         if (!cv || cv == _down_view || cv->content() == _down_view->content()) {
 377                                 continue;
 378                         }
 379
 380                         maybe_snap (cv->content()->position(), new_position, nearest_distance);
 381                         maybe_snap (cv->content()->position(), new_end, nearest_distance);
 382                         maybe_snap (cv->content()->end(), new_position, nearest_distance);
 383                         maybe_snap (cv->content()->end(), new_end, nearest_distance);
 384                 }
 385
 386                 if (nearest_distance) {
 387                         /* Snap if it's close; `close' means within a proportion of the time on the timeline */
 388                         if (nearest_distance.get().abs() < DCPTime::from_seconds ((width() / pps) / 64)) {
 389                                 new_position += nearest_distance.get ();
 390                         }
 391                 }
 392         }
 393
 394         if (new_position < DCPTime ()) {
 395                 new_position = DCPTime ();
 396         }
 397
 398         _down_view->content()->set_position (new_position);
 399
 400         shared_ptr<Film> film = _film.lock ();
 401         DCPOMATIC_ASSERT (film);
 402         film->set_sequence_video (false);
 403 }
 404
 405 void
 406 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 407 {
 408         RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 409 }
 410
 411 shared_ptr<const Film>
 412 Timeline::film () const
 413 {
 414         return _film.lock ();
 415 }
 416
 417 void
 418 Timeline::resized ()
 419 {
 420         setup_pixels_per_second ();
 421 }
 422
 423 void
 424 Timeline::clear_selection ()
 425 {
 426         for (TimelineViewList::iterator i = _views.begin(); i != _views.end(); ++i) {
 427                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 428                 if (cv) {
 429                         cv->set_selected (false);
 430                 }
 431         }
 432 }
 433
 434 TimelineContentViewList
 435 Timeline::selected_views () const
 436 {
 437         TimelineContentViewList sel;
 438
 439         for (TimelineViewList::const_iterator i = _views.begin(); i != _views.end(); ++i) {
 440                 shared_ptr<TimelineContentView> cv = dynamic_pointer_cast<TimelineContentView> (*i);
 441                 if (cv && cv->selected()) {
 442                         sel.push_back (cv);
 443                 }
 444         }
 445
 446         return sel;
 447 }
 448
 449 ContentList
 450 Timeline::selected_content () const
 451 {
 452         ContentList sel;
 453         TimelineContentViewList views = selected_views ();
 454
 455         for (TimelineContentViewList::const_iterator i = views.begin(); i != views.end(); ++i) {
 456                 sel.push_back ((*i)->content ());
 457         }
 458
 459         return sel;
 460 }