src/wx/timeline.cc

   1 /*
   2     Copyright (C) 2013 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 <list>
  21 #include <wx/graphics.h>
  22 #include <boost/weak_ptr.hpp>
  23 #include "lib/film.h"
  24 #include "lib/playlist.h"
  25 #include "film_editor.h"
  26 #include "timeline.h"
  27 #include "wx_util.h"
  28
  29 using std::list;
  30 using std::cout;
  31 using std::max;
  32 using boost::shared_ptr;
  33 using boost::weak_ptr;
  34 using boost::dynamic_pointer_cast;
  35 using boost::bind;
  36
  37 class View : public boost::noncopyable
  38 {
  39 public:
  40         View (Timeline& t)
  41                 : _timeline (t)
  42         {
  43
  44         }
  45
  46         void paint (wxGraphicsContext* g)
  47         {
  48                 _last_paint_bbox = bbox ();
  49                 do_paint (g);
  50         }
  51
  52         void force_redraw ()
  53         {
  54                 _timeline.force_redraw (_last_paint_bbox);
  55                 _timeline.force_redraw (bbox ());
  56         }
  57
  58         virtual dcpomatic::Rect<int> bbox () const = 0;
  59
  60 protected:
  61         virtual void do_paint (wxGraphicsContext *) = 0;
  62
  63         int time_x (Time t) const
  64         {
  65                 return _timeline.tracks_position().x + t * _timeline.pixels_per_time_unit();
  66         }
  67
  68         Timeline& _timeline;
  69
  70 private:
  71         dcpomatic::Rect<int> _last_paint_bbox;
  72 };
  73
  74 class ContentView : public View
  75 {
  76 public:
  77         ContentView (Timeline& tl, shared_ptr<Content> c, int t)
  78                 : View (tl)
  79                 , _content (c)
  80                 , _track (t)
  81                 , _selected (false)
  82         {
  83                 _content_connection = c->Changed.connect (bind (&ContentView::content_changed, this, _2));
  84         }
  85
  86         dcpomatic::Rect<int> bbox () const
  87         {
  88                 shared_ptr<const Film> film = _timeline.film ();
  89                 if (!film) {
  90                         return dcpomatic::Rect<int> ();
  91                 }
  92
  93                 return dcpomatic::Rect<int> (
  94                         time_x (_content->start ()) - 8,
  95                         y_pos (_track) - 8,
  96                         _content->length () * _timeline.pixels_per_time_unit() + 16,
  97                         _timeline.track_height() + 16
  98                         );
  99         }
 100
 101         void set_selected (bool s) {
 102                 _selected = s;
 103                 force_redraw ();
 104         }
 105
 106         bool selected () const {
 107                 return _selected;
 108         }
 109
 110         shared_ptr<Content> content () const {
 111                 return _content;
 112         }
 113
 114         void set_track (int t) {
 115                 _track = t;
 116         }
 117
 118         int track () const {
 119                 return _track;
 120         }
 121
 122         virtual wxString type () const = 0;
 123         virtual wxColour colour () const = 0;
 124
 125 private:
 126
 127         void do_paint (wxGraphicsContext* gc)
 128         {
 129                 shared_ptr<const Film> film = _timeline.film ();
 130                 if (!film) {
 131                         return;
 132                 }
 133
 134                 Time const start = _content->start ();
 135                 Time const len = _content->length ();
 136
 137                 wxColour selected (colour().Red() / 2, colour().Green() / 2, colour().Blue() / 2);
 138
 139                 gc->SetPen (*wxBLACK_PEN);
 140
 141                 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (0, 0, 0), 4, wxPENSTYLE_SOLID));
 142                 if (_selected) {
 143                         gc->SetBrush (*wxTheBrushList->FindOrCreateBrush (selected, wxBRUSHSTYLE_SOLID));
 144                 } else {
 145                         gc->SetBrush (*wxTheBrushList->FindOrCreateBrush (colour(), wxBRUSHSTYLE_SOLID));
 146                 }
 147
 148                 wxGraphicsPath path = gc->CreatePath ();
 149                 path.MoveToPoint    (time_x (start),       y_pos (_track) + 4);
 150                 path.AddLineToPoint (time_x (start + len), y_pos (_track) + 4);
 151                 path.AddLineToPoint (time_x (start + len), y_pos (_track + 1) - 4);
 152                 path.AddLineToPoint (time_x (start),       y_pos (_track + 1) - 4);
 153                 path.AddLineToPoint (time_x (start),       y_pos (_track) + 4);
 154                 gc->StrokePath (path);
 155                 gc->FillPath (path);
 156
 157                 wxString name = wxString::Format (wxT ("%s [%s]"), std_to_wx (_content->file().filename().string()).data(), type().data());
 158                 wxDouble name_width;
 159                 wxDouble name_height;
 160                 wxDouble name_descent;
 161                 wxDouble name_leading;
 162                 gc->GetTextExtent (name, &name_width, &name_height, &name_descent, &name_leading);
 163
 164                 gc->Clip (wxRegion (time_x (start), y_pos (_track), len * _timeline.pixels_per_time_unit(), _timeline.track_height()));
 165                 gc->DrawText (name, time_x (start) + 12, y_pos (_track + 1) - name_height - 4);
 166                 gc->ResetClip ();
 167         }
 168
 169         int y_pos (int t) const
 170         {
 171                 return _timeline.tracks_position().y + t * _timeline.track_height();
 172         }
 173
 174         void content_changed (int p)
 175         {
 176                 if (p == ContentProperty::START || p == ContentProperty::LENGTH) {
 177                         force_redraw ();
 178                 }
 179         }
 180
 181         /* This must be a shared_ptr, not a weak_ptr, as in the looped case this
 182            will be the only remaining pointer to the looped content that we get
 183            from the playlist.
 184         */
 185         boost::shared_ptr<Content> _content;
 186         int _track;
 187         bool _selected;
 188
 189         boost::signals2::scoped_connection _content_connection;
 190 };
 191
 192 class AudioContentView : public ContentView
 193 {
 194 public:
 195         AudioContentView (Timeline& tl, shared_ptr<Content> c, int t)
 196                 : ContentView (tl, c, t)
 197         {}
 198
 199 private:
 200         wxString type () const
 201         {
 202                 return _("audio");
 203         }
 204
 205         wxColour colour () const
 206         {
 207                 return wxColour (149, 121, 232, 255);
 208         }
 209 };
 210
 211 class VideoContentView : public ContentView
 212 {
 213 public:
 214         VideoContentView (Timeline& tl, shared_ptr<Content> c, int t)
 215                 : ContentView (tl, c, t)
 216         {}
 217
 218 private:
 219
 220         wxString type () const
 221         {
 222                 if (dynamic_pointer_cast<FFmpegContent> (content ())) {
 223                         return _("video");
 224                 } else {
 225                         return _("still");
 226                 }
 227         }
 228
 229         wxColour colour () const
 230         {
 231                 return wxColour (242, 92, 120, 255);
 232         }
 233 };
 234
 235 class TimeAxisView : public View
 236 {
 237 public:
 238         TimeAxisView (Timeline& tl, int y)
 239                 : View (tl)
 240                 , _y (y)
 241         {}
 242
 243         dcpomatic::Rect<int> bbox () const
 244         {
 245                 return dcpomatic::Rect<int> (0, _y - 4, _timeline.width(), 24);
 246         }
 247
 248         void set_y (int y)
 249         {
 250                 _y = y;
 251                 force_redraw ();
 252         }
 253
 254 private:
 255
 256         void do_paint (wxGraphicsContext* gc)
 257         {
 258                 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (0, 0, 0), 1, wxPENSTYLE_SOLID));
 259
 260                 int mark_interval = rint (128 / (TIME_HZ * _timeline.pixels_per_time_unit ()));
 261                 if (mark_interval > 5) {
 262                         mark_interval -= mark_interval % 5;
 263                 }
 264                 if (mark_interval > 10) {
 265                         mark_interval -= mark_interval % 10;
 266                 }
 267                 if (mark_interval > 60) {
 268                         mark_interval -= mark_interval % 60;
 269                 }
 270                 if (mark_interval > 3600) {
 271                         mark_interval -= mark_interval % 3600;
 272                 }
 273
 274                 if (mark_interval < 1) {
 275                         mark_interval = 1;
 276                 }
 277
 278                 wxGraphicsPath path = gc->CreatePath ();
 279                 path.MoveToPoint (_timeline.x_offset(), _y);
 280                 path.AddLineToPoint (_timeline.width(), _y);
 281                 gc->StrokePath (path);
 282
 283                 Time t = 0;
 284                 while ((t * _timeline.pixels_per_time_unit()) < _timeline.width()) {
 285                         wxGraphicsPath path = gc->CreatePath ();
 286                         path.MoveToPoint (time_x (t), _y - 4);
 287                         path.AddLineToPoint (time_x (t), _y + 4);
 288                         gc->StrokePath (path);
 289
 290                         int tc = t / TIME_HZ;
 291                         int const h = tc / 3600;
 292                         tc -= h * 3600;
 293                         int const m = tc / 60;
 294                         tc -= m * 60;
 295                         int const s = tc;
 296
 297                         wxString str = wxString::Format (wxT ("%02d:%02d:%02d"), h, m, s);
 298                         wxDouble str_width;
 299                         wxDouble str_height;
 300                         wxDouble str_descent;
 301                         wxDouble str_leading;
 302                         gc->GetTextExtent (str, &str_width, &str_height, &str_descent, &str_leading);
 303
 304                         int const tx = _timeline.x_offset() + t * _timeline.pixels_per_time_unit();
 305                         if ((tx + str_width) < _timeline.width()) {
 306                                 gc->DrawText (str, time_x (t), _y + 16);
 307                         }
 308
 309                         t += mark_interval * TIME_HZ;
 310                 }
 311         }
 312
 313 private:
 314         int _y;
 315 };
 316
 317 Timeline::Timeline (wxWindow* parent, FilmEditor* ed, shared_ptr<Film> film)
 318         : wxPanel (parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE)
 319         , _film_editor (ed)
 320         , _film (film)
 321         , _time_axis_view (new TimeAxisView (*this, 32))
 322         , _tracks (0)
 323         , _pixels_per_time_unit (0)
 324         , _left_down (false)
 325         , _down_view_start (0)
 326         , _first_move (false)
 327 {
 328 #ifndef __WXOSX__
 329         SetDoubleBuffered (true);
 330 #endif
 331
 332         setup_pixels_per_time_unit ();
 333
 334         Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (Timeline::paint), 0, this);
 335         Connect (wxID_ANY, wxEVT_LEFT_DOWN, wxMouseEventHandler (Timeline::left_down), 0, this);
 336         Connect (wxID_ANY, wxEVT_LEFT_UP, wxMouseEventHandler (Timeline::left_up), 0, this);
 337         Connect (wxID_ANY, wxEVT_MOTION, wxMouseEventHandler (Timeline::mouse_moved), 0, this);
 338         Connect (wxID_ANY, wxEVT_SIZE, wxSizeEventHandler (Timeline::resized), 0, this);
 339
 340         playlist_changed ();
 341
 342         SetMinSize (wxSize (640, tracks() * track_height() + 96));
 343
 344         _playlist_connection = film->playlist()->Changed.connect (bind (&Timeline::playlist_changed, this));
 345
 346         _views.push_back (_time_axis_view);
 347 }
 348
 349 void
 350 Timeline::paint (wxPaintEvent &)
 351 {
 352         wxPaintDC dc (this);
 353
 354         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 355         if (!gc) {
 356                 return;
 357         }
 358
 359         gc->SetFont (gc->CreateFont (*wxNORMAL_FONT));
 360
 361         for (list<shared_ptr<View> >::iterator i = _views.begin(); i != _views.end(); ++i) {
 362                 (*i)->paint (gc);
 363         }
 364
 365         delete gc;
 366 }
 367
 368 void
 369 Timeline::playlist_changed ()
 370 {
 371         shared_ptr<const Film> fl = _film.lock ();
 372         if (!fl) {
 373                 return;
 374         }
 375
 376         _views.clear ();
 377
 378         Playlist::ContentList content = fl->playlist()->content_with_loop ();
 379
 380         for (Playlist::ContentList::iterator i = content.begin(); i != content.end(); ++i) {
 381                 if (dynamic_pointer_cast<VideoContent> (*i)) {
 382                         _views.push_back (shared_ptr<View> (new VideoContentView (*this, *i, 0)));
 383                 }
 384                 if (dynamic_pointer_cast<AudioContent> (*i)) {
 385                         _views.push_back (shared_ptr<View> (new AudioContentView (*this, *i, 0)));
 386                 }
 387         }
 388
 389         assign_tracks ();
 390         Refresh ();
 391 }
 392
 393 void
 394 Timeline::assign_tracks ()
 395 {
 396         for (list<shared_ptr<View> >::iterator i = _views.begin(); i != _views.end(); ++i) {
 397                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*i);
 398                 if (cv) {
 399                         cv->set_track (0);
 400                         _tracks = 1;
 401                 }
 402         }
 403
 404         for (list<shared_ptr<View> >::iterator i = _views.begin(); i != _views.end(); ++i) {
 405                 shared_ptr<AudioContentView> acv = dynamic_pointer_cast<AudioContentView> (*i);
 406                 if (!acv) {
 407                         continue;
 408                 }
 409
 410                 shared_ptr<Content> acv_content = acv->content();
 411
 412                 int t = 1;
 413                 while (1) {
 414                         list<shared_ptr<View> >::iterator j = _views.begin();
 415                         while (j != _views.end()) {
 416                                 shared_ptr<AudioContentView> test = dynamic_pointer_cast<AudioContentView> (*j);
 417                                 if (!test) {
 418                                         ++j;
 419                                         continue;
 420                                 }
 421
 422                                 shared_ptr<Content> test_content = test->content();
 423
 424                                 if (test && test->track() == t) {
 425                                         if ((acv_content->start() < test_content->start() && test_content->start() < acv_content->end()) ||
 426                                             (acv_content->start() < test_content->end()   && test_content->end()   < acv_content->end())) {
 427                                                 /* we have an overlap on track `t' */
 428                                                 ++t;
 429                                                 break;
 430                                         }
 431                                 }
 432
 433                                 ++j;
 434                         }
 435
 436                         if (j == _views.end ()) {
 437                                 /* no overlap on `t' */
 438                                 break;
 439                         }
 440                 }
 441
 442                 acv->set_track (t);
 443                 _tracks = max (_tracks, t + 1);
 444         }
 445
 446         _time_axis_view->set_y (tracks() * track_height() + 32);
 447 }
 448
 449 int
 450 Timeline::tracks () const
 451 {
 452         return _tracks;
 453 }
 454
 455 void
 456 Timeline::setup_pixels_per_time_unit ()
 457 {
 458         shared_ptr<const Film> film = _film.lock ();
 459         if (!film) {
 460                 return;
 461         }
 462
 463         _pixels_per_time_unit = static_cast<double>(width() - x_offset() * 2) / film->length_with_loop();
 464 }
 465
 466 void
 467 Timeline::left_down (wxMouseEvent& ev)
 468 {
 469         list<shared_ptr<View> >::iterator i = _views.begin();
 470         Position<int> const p (ev.GetX(), ev.GetY());
 471         while (i != _views.end() && !(*i)->bbox().contains (p)) {
 472                 ++i;
 473         }
 474
 475         _down_view.reset ();
 476
 477         if (i != _views.end ()) {
 478                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*i);
 479                 if (cv) {
 480                         _down_view = cv;
 481                         _down_view_start = cv->content()->start ();
 482                 }
 483         }
 484
 485         for (list<shared_ptr<View> >::iterator j = _views.begin(); j != _views.end(); ++j) {
 486                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*j);
 487                 if (cv) {
 488                         cv->set_selected (i == j);
 489                         if (i == j) {
 490                                 _film_editor->set_selection (cv->content ());
 491                         }
 492                 }
 493         }
 494
 495         _left_down = true;
 496         _down_point = ev.GetPosition ();
 497         _first_move = false;
 498
 499         if (_down_view) {
 500                 _down_view->content()->set_change_signals_frequent (true);
 501         }
 502 }
 503
 504 void
 505 Timeline::left_up (wxMouseEvent& ev)
 506 {
 507         _left_down = false;
 508
 509         if (_down_view) {
 510                 _down_view->content()->set_change_signals_frequent (false);
 511         }
 512
 513         set_start_from_event (ev);
 514 }
 515
 516 void
 517 Timeline::mouse_moved (wxMouseEvent& ev)
 518 {
 519         if (!_left_down) {
 520                 return;
 521         }
 522
 523         set_start_from_event (ev);
 524 }
 525
 526 void
 527 Timeline::set_start_from_event (wxMouseEvent& ev)
 528 {
 529         wxPoint const p = ev.GetPosition();
 530
 531         if (!_first_move) {
 532                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 533                 if (dist < 8) {
 534                         return;
 535                 }
 536                 _first_move = true;
 537         }
 538
 539         Time const time_diff = (p.x - _down_point.x) / _pixels_per_time_unit;
 540         if (_down_view) {
 541                 _down_view->content()->set_start (max (static_cast<Time> (0), _down_view_start + time_diff));
 542
 543                 shared_ptr<Film> film = _film.lock ();
 544                 assert (film);
 545                 film->set_sequence_video (false);
 546         }
 547 }
 548
 549 void
 550 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 551 {
 552         RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 553 }
 554
 555 shared_ptr<const Film>
 556 Timeline::film () const
 557 {
 558         return _film.lock ();
 559 }
 560
 561 void
 562 Timeline::resized (wxSizeEvent &)
 563 {
 564         setup_pixels_per_time_unit ();
 565 }