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                 cout << "base paint " << this << "\n";
  49                 _last_paint_bbox = bbox ();
  50                 do_paint (g);
  51         }
  52
  53         void force_redraw ()
  54         {
  55                 _timeline.force_redraw (_last_paint_bbox);
  56                 _timeline.force_redraw (bbox ());
  57         }
  58
  59         virtual dcpomatic::Rect<int> bbox () const = 0;
  60
  61 protected:
  62         virtual void do_paint (wxGraphicsContext *) = 0;
  63
  64         int time_x (Time t) const
  65         {
  66                 return _timeline.tracks_position().x + t * _timeline.pixels_per_time_unit();
  67         }
  68
  69         Timeline& _timeline;
  70
  71 private:
  72         dcpomatic::Rect<int> _last_paint_bbox;
  73 };
  74
  75 class ContentView : public View
  76 {
  77 public:
  78         ContentView (Timeline& tl, shared_ptr<Content> c, int t)
  79                 : View (tl)
  80                 , _content (c)
  81                 , _track (t)
  82                 , _selected (false)
  83         {
  84                 _content_connection = c->Changed.connect (bind (&ContentView::content_changed, this, _2));
  85         }
  86
  87         dcpomatic::Rect<int> bbox () const
  88         {
  89                 shared_ptr<const Film> film = _timeline.film ();
  90                 if (!film) {
  91                         return dcpomatic::Rect<int> ();
  92                 }
  93
  94                 return dcpomatic::Rect<int> (
  95                         time_x (_content->start ()) - 8,
  96                         y_pos (_track) - 8,
  97                         _content->length () * _timeline.pixels_per_time_unit() + 16,
  98                         _timeline.track_height() + 16
  99                         );
 100         }
 101
 102         void set_selected (bool s) {
 103                 _selected = s;
 104                 force_redraw ();
 105         }
 106
 107         bool selected () const {
 108                 return _selected;
 109         }
 110
 111         shared_ptr<Content> content () const {
 112                 return _content;
 113         }
 114
 115         void set_track (int t) {
 116                 _track = t;
 117         }
 118
 119         int track () const {
 120                 return _track;
 121         }
 122
 123         virtual wxString type () const = 0;
 124         virtual wxColour colour () const = 0;
 125
 126 private:
 127
 128         void do_paint (wxGraphicsContext* gc)
 129         {
 130                 shared_ptr<const Film> film = _timeline.film ();
 131                 if (!film) {
 132                         return;
 133                 }
 134
 135                 Time const start = _content->start ();
 136                 Time const len = _content->length ();
 137
 138                 wxColour selected (colour().Red() / 2, colour().Green() / 2, colour().Blue() / 2);
 139
 140                 gc->SetPen (*wxBLACK_PEN);
 141
 142                 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (0, 0, 0), 4, wxPENSTYLE_SOLID));
 143                 if (_selected) {
 144                         gc->SetBrush (*wxTheBrushList->FindOrCreateBrush (selected, wxBRUSHSTYLE_SOLID));
 145                 } else {
 146                         gc->SetBrush (*wxTheBrushList->FindOrCreateBrush (colour(), wxBRUSHSTYLE_SOLID));
 147                 }
 148
 149                 cout << "paint " << static_cast<View*> (this) << " " << _content.get() << " @ " << time_x (start) << "\n";
 150
 151                 wxGraphicsPath path = gc->CreatePath ();
 152                 path.MoveToPoint    (time_x (start),       y_pos (_track) + 4);
 153                 path.AddLineToPoint (time_x (start + len), y_pos (_track) + 4);
 154                 path.AddLineToPoint (time_x (start + len), y_pos (_track + 1) - 4);
 155                 path.AddLineToPoint (time_x (start),       y_pos (_track + 1) - 4);
 156                 path.AddLineToPoint (time_x (start),       y_pos (_track) + 4);
 157                 gc->StrokePath (path);
 158                 gc->FillPath (path);
 159
 160                 wxString name = wxString::Format (wxT ("%s [%s]"), std_to_wx (_content->file().filename().string()).data(), type().data());
 161                 wxDouble name_width;
 162                 wxDouble name_height;
 163                 wxDouble name_descent;
 164                 wxDouble name_leading;
 165                 gc->GetTextExtent (name, &name_width, &name_height, &name_descent, &name_leading);
 166
 167                 gc->Clip (wxRegion (time_x (start), y_pos (_track), len * _timeline.pixels_per_time_unit(), _timeline.track_height()));
 168                 gc->DrawText (name, time_x (start) + 12, y_pos (_track + 1) - name_height - 4);
 169                 gc->ResetClip ();
 170         }
 171
 172         int y_pos (int t) const
 173         {
 174                 return _timeline.tracks_position().y + t * _timeline.track_height();
 175         }
 176
 177         void content_changed (int p)
 178         {
 179                 if (p == ContentProperty::START || p == ContentProperty::LENGTH) {
 180                         force_redraw ();
 181                 }
 182         }
 183
 184         /* This must be a shared_ptr, not a weak_ptr, as in the looped case this
 185            will be the only remaining pointer to the looped content that we get
 186            from the playlist.
 187         */
 188         boost::shared_ptr<Content> _content;
 189         int _track;
 190         bool _selected;
 191
 192         boost::signals2::scoped_connection _content_connection;
 193 };
 194
 195 class AudioContentView : public ContentView
 196 {
 197 public:
 198         AudioContentView (Timeline& tl, shared_ptr<Content> c, int t)
 199                 : ContentView (tl, c, t)
 200         {}
 201
 202 private:
 203         wxString type () const
 204         {
 205                 return _("audio");
 206         }
 207
 208         wxColour colour () const
 209         {
 210                 return wxColour (149, 121, 232, 255);
 211         }
 212 };
 213
 214 class VideoContentView : public ContentView
 215 {
 216 public:
 217         VideoContentView (Timeline& tl, shared_ptr<Content> c, int t)
 218                 : ContentView (tl, c, t)
 219         {}
 220
 221 private:
 222
 223         wxString type () const
 224         {
 225                 return _("video");
 226         }
 227
 228         wxColour colour () const
 229         {
 230                 return wxColour (242, 92, 120, 255);
 231         }
 232 };
 233
 234 class TimeAxisView : public View
 235 {
 236 public:
 237         TimeAxisView (Timeline& tl, int y)
 238                 : View (tl)
 239                 , _y (y)
 240         {}
 241
 242         dcpomatic::Rect<int> bbox () const
 243         {
 244                 return dcpomatic::Rect<int> (0, _y - 4, _timeline.width(), 24);
 245         }
 246
 247         void set_y (int y)
 248         {
 249                 _y = y;
 250                 force_redraw ();
 251         }
 252
 253 private:
 254
 255         void do_paint (wxGraphicsContext* gc)
 256         {
 257                 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (0, 0, 0), 1, wxPENSTYLE_SOLID));
 258
 259                 int mark_interval = rint (128 / (TIME_HZ * _timeline.pixels_per_time_unit ()));
 260                 if (mark_interval > 5) {
 261                         mark_interval -= mark_interval % 5;
 262                 }
 263                 if (mark_interval > 10) {
 264                         mark_interval -= mark_interval % 10;
 265                 }
 266                 if (mark_interval > 60) {
 267                         mark_interval -= mark_interval % 60;
 268                 }
 269                 if (mark_interval > 3600) {
 270                         mark_interval -= mark_interval % 3600;
 271                 }
 272
 273                 if (mark_interval < 1) {
 274                         mark_interval = 1;
 275                 }
 276
 277                 wxGraphicsPath path = gc->CreatePath ();
 278                 path.MoveToPoint (_timeline.x_offset(), _y);
 279                 path.AddLineToPoint (_timeline.width(), _y);
 280                 gc->StrokePath (path);
 281
 282                 Time t = 0;
 283                 while ((t * _timeline.pixels_per_time_unit()) < _timeline.width()) {
 284                         wxGraphicsPath path = gc->CreatePath ();
 285                         path.MoveToPoint (time_x (t), _y - 4);
 286                         path.AddLineToPoint (time_x (t), _y + 4);
 287                         gc->StrokePath (path);
 288
 289                         int tc = t / TIME_HZ;
 290                         int const h = tc / 3600;
 291                         tc -= h * 3600;
 292                         int const m = tc / 60;
 293                         tc -= m * 60;
 294                         int const s = tc;
 295
 296                         wxString str = wxString::Format (wxT ("%02d:%02d:%02d"), h, m, s);
 297                         wxDouble str_width;
 298                         wxDouble str_height;
 299                         wxDouble str_descent;
 300                         wxDouble str_leading;
 301                         gc->GetTextExtent (str, &str_width, &str_height, &str_descent, &str_leading);
 302
 303                         int const tx = _timeline.x_offset() + t * _timeline.pixels_per_time_unit();
 304                         if ((tx + str_width) < _timeline.width()) {
 305                                 gc->DrawText (str, time_x (t), _y + 16);
 306                         }
 307
 308                         t += mark_interval * TIME_HZ;
 309                 }
 310         }
 311
 312 private:
 313         int _y;
 314 };
 315
 316 Timeline::Timeline (wxWindow* parent, FilmEditor* ed, shared_ptr<Film> film)
 317         : wxPanel (parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE)
 318         , _film_editor (ed)
 319         , _film (film)
 320         , _time_axis_view (new TimeAxisView (*this, 32))
 321         , _tracks (0)
 322         , _pixels_per_time_unit (0)
 323         , _left_down (false)
 324         , _down_view_start (0)
 325         , _first_move (false)
 326 {
 327 #ifndef __WXOSX__
 328         SetDoubleBuffered (true);
 329 #endif
 330
 331         setup_pixels_per_time_unit ();
 332
 333         Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (Timeline::paint), 0, this);
 334         Connect (wxID_ANY, wxEVT_LEFT_DOWN, wxMouseEventHandler (Timeline::left_down), 0, this);
 335         Connect (wxID_ANY, wxEVT_LEFT_UP, wxMouseEventHandler (Timeline::left_up), 0, this);
 336         Connect (wxID_ANY, wxEVT_MOTION, wxMouseEventHandler (Timeline::mouse_moved), 0, this);
 337         Connect (wxID_ANY, wxEVT_SIZE, wxSizeEventHandler (Timeline::resized), 0, this);
 338
 339         playlist_changed ();
 340
 341         SetMinSize (wxSize (640, tracks() * track_height() + 96));
 342
 343         _playlist_connection = film->playlist()->Changed.connect (bind (&Timeline::playlist_changed, this));
 344
 345         _views.push_back (_time_axis_view);
 346 }
 347
 348 void
 349 Timeline::paint (wxPaintEvent &)
 350 {
 351         wxPaintDC dc (this);
 352
 353         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 354         if (!gc) {
 355                 return;
 356         }
 357
 358         gc->SetFont (gc->CreateFont (*wxNORMAL_FONT));
 359
 360         cout << "painting " << _views.size() << "\n";
 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         cout << "clearing views.\n";
 377         _views.clear ();
 378
 379         Playlist::ContentList content = fl->playlist()->content_with_loop ();
 380
 381         for (Playlist::ContentList::iterator i = content.begin(); i != content.end(); ++i) {
 382                 if (dynamic_pointer_cast<VideoContent> (*i)) {
 383                         _views.push_back (shared_ptr<View> (new VideoContentView (*this, *i, 0)));
 384                 }
 385                 if (dynamic_pointer_cast<AudioContent> (*i)) {
 386                         _views.push_back (shared_ptr<View> (new AudioContentView (*this, *i, 0)));
 387                 }
 388         }
 389
 390         assign_tracks ();
 391         Refresh ();
 392 }
 393
 394 void
 395 Timeline::assign_tracks ()
 396 {
 397         for (list<shared_ptr<View> >::iterator i = _views.begin(); i != _views.end(); ++i) {
 398                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*i);
 399                 if (cv) {
 400                         cv->set_track (0);
 401                         _tracks = 1;
 402                 }
 403         }
 404
 405         for (list<shared_ptr<View> >::iterator i = _views.begin(); i != _views.end(); ++i) {
 406                 shared_ptr<AudioContentView> acv = dynamic_pointer_cast<AudioContentView> (*i);
 407                 if (!acv) {
 408                         continue;
 409                 }
 410
 411                 shared_ptr<Content> acv_content = acv->content();
 412
 413                 int t = 1;
 414                 while (1) {
 415                         list<shared_ptr<View> >::iterator j = _views.begin();
 416                         while (j != _views.end()) {
 417                                 shared_ptr<AudioContentView> test = dynamic_pointer_cast<AudioContentView> (*j);
 418                                 if (!test) {
 419                                         ++j;
 420                                         continue;
 421                                 }
 422
 423                                 shared_ptr<Content> test_content = test->content();
 424
 425                                 if (test && test->track() == t) {
 426                                         if ((acv_content->start() < test_content->start() && test_content->start() < acv_content->end()) ||
 427                                             (acv_content->start() < test_content->end()   && test_content->end()   < acv_content->end())) {
 428                                                 /* we have an overlap on track `t' */
 429                                                 ++t;
 430                                                 break;
 431                                         }
 432                                 }
 433
 434                                 ++j;
 435                         }
 436
 437                         if (j == _views.end ()) {
 438                                 /* no overlap on `t' */
 439                                 break;
 440                         }
 441                 }
 442
 443                 acv->set_track (t);
 444                 _tracks = max (_tracks, t + 1);
 445         }
 446
 447         _time_axis_view->set_y (tracks() * track_height() + 32);
 448 }
 449
 450 int
 451 Timeline::tracks () const
 452 {
 453         return _tracks;
 454 }
 455
 456 void
 457 Timeline::setup_pixels_per_time_unit ()
 458 {
 459         shared_ptr<const Film> film = _film.lock ();
 460         if (!film) {
 461                 return;
 462         }
 463
 464         _pixels_per_time_unit = static_cast<double>(width() - x_offset() * 2) / film->length_with_loop();
 465 }
 466
 467 void
 468 Timeline::left_down (wxMouseEvent& ev)
 469 {
 470         list<shared_ptr<View> >::iterator i = _views.begin();
 471         Position<int> const p (ev.GetX(), ev.GetY());
 472         while (i != _views.end() && !(*i)->bbox().contains (p)) {
 473                 ++i;
 474         }
 475
 476         _down_view.reset ();
 477
 478         if (i != _views.end ()) {
 479                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*i);
 480                 if (cv) {
 481                         _down_view = cv;
 482                         _down_view_start = cv->content()->start ();
 483                 }
 484         }
 485
 486         for (list<shared_ptr<View> >::iterator j = _views.begin(); j != _views.end(); ++j) {
 487                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*j);
 488                 if (cv) {
 489                         cv->set_selected (i == j);
 490                         if (i == j) {
 491                                 _film_editor->set_selection (cv->content ());
 492                         }
 493                 }
 494         }
 495
 496         _left_down = true;
 497         _down_point = ev.GetPosition ();
 498         _first_move = false;
 499
 500         if (_down_view) {
 501                 _down_view->content()->set_change_signals_frequent (true);
 502         }
 503 }
 504
 505 void
 506 Timeline::left_up (wxMouseEvent& ev)
 507 {
 508         _left_down = false;
 509
 510         if (_down_view) {
 511                 _down_view->content()->set_change_signals_frequent (false);
 512         }
 513
 514         set_start_from_event (ev);
 515 }
 516
 517 void
 518 Timeline::mouse_moved (wxMouseEvent& ev)
 519 {
 520         if (!_left_down) {
 521                 return;
 522         }
 523
 524         set_start_from_event (ev);
 525 }
 526
 527 void
 528 Timeline::set_start_from_event (wxMouseEvent& ev)
 529 {
 530         wxPoint const p = ev.GetPosition();
 531
 532         if (!_first_move) {
 533                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 534                 if (dist < 8) {
 535                         return;
 536                 }
 537                 _first_move = true;
 538         }
 539
 540         Time const time_diff = (p.x - _down_point.x) / _pixels_per_time_unit;
 541         if (_down_view) {
 542                 _down_view->content()->set_start (max (static_cast<Time> (0), _down_view_start + time_diff));
 543
 544                 shared_ptr<Film> film = _film.lock ();
 545                 assert (film);
 546                 film->set_sequence_video (false);
 547         }
 548 }
 549
 550 void
 551 Timeline::force_redraw (dcpomatic::Rect<int> const & r)
 552 {
 553         RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 554 }
 555
 556 shared_ptr<const Film>
 557 Timeline::film () const
 558 {
 559         return _film.lock ();
 560 }
 561
 562 void
 563 Timeline::resized (wxSizeEvent &)
 564 {
 565         setup_pixels_per_time_unit ();
 566 }