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 "film.h"
  24 #include "film_editor.h"
  25 #include "timeline.h"
  26 #include "wx_util.h"
  27 #include "lib/playlist.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
  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 Rect 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         Rect _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         Rect bbox () const
  87         {
  88                 shared_ptr<const Film> film = _timeline.film ();
  89                 shared_ptr<const Content> content = _content.lock ();
  90                 if (!film || !content) {
  91                         return Rect ();
  92                 }
  93
  94                 return Rect (
  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         weak_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                 shared_ptr<const Content> content = _content.lock ();
 132                 if (!film || !content) {
 133                         return;
 134                 }
 135
 136                 Time const start = content->start ();
 137                 Time const len = content->length ();
 138
 139                 wxColour selected (colour().Red() / 2, colour().Green() / 2, colour().Blue() / 2);
 140
 141                 gc->SetPen (*wxBLACK_PEN);
 142
 143 #if wxMAJOR_VERSION == 2 && wxMINOR_VERSION >= 9
 144                 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (0, 0, 0), 4, wxPENSTYLE_SOLID));
 145                 if (_selected) {
 146                         gc->SetBrush (*wxTheBrushList->FindOrCreateBrush (selected, wxBRUSHSTYLE_SOLID));
 147                 } else {
 148                         gc->SetBrush (*wxTheBrushList->FindOrCreateBrush (colour(), wxBRUSHSTYLE_SOLID));
 149                 }
 150 #else
 151                 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (0, 0, 0), 4, wxSOLID));
 152                 if (_selected) {
 153                         gc->SetBrush (*wxTheBrushList->FindOrCreateBrush (selected, wxSOLID));
 154                 } else {
 155                         gc->SetBrush (*wxTheBrushList->FindOrCreateBrush (colour(), wxSOLID));
 156                 }
 157 #endif
 158
 159                 wxGraphicsPath path = gc->CreatePath ();
 160                 path.MoveToPoint    (time_x (start),       y_pos (_track) + 4);
 161                 path.AddLineToPoint (time_x (start + len), y_pos (_track) + 4);
 162                 path.AddLineToPoint (time_x (start + len), y_pos (_track + 1) - 4);
 163                 path.AddLineToPoint (time_x (start),       y_pos (_track + 1) - 4);
 164                 path.AddLineToPoint (time_x (start),       y_pos (_track) + 4);
 165                 gc->StrokePath (path);
 166                 gc->FillPath (path);
 167
 168                 wxString name = wxString::Format (wxT ("%s [%s]"), std_to_wx (content->file().filename().string()).data(), type().data());
 169                 wxDouble name_width;
 170                 wxDouble name_height;
 171                 wxDouble name_descent;
 172                 wxDouble name_leading;
 173                 gc->GetTextExtent (name, &name_width, &name_height, &name_descent, &name_leading);
 174
 175                 gc->Clip (wxRegion (time_x (start), y_pos (_track), len * _timeline.pixels_per_time_unit(), _timeline.track_height()));
 176                 gc->DrawText (name, time_x (start) + 12, y_pos (_track + 1) - name_height - 4);
 177                 gc->ResetClip ();
 178         }
 179
 180         int y_pos (int t) const
 181         {
 182                 return _timeline.tracks_position().y + t * _timeline.track_height();
 183         }
 184
 185         void content_changed (int p)
 186         {
 187                 if (p == ContentProperty::START || p == ContentProperty::LENGTH) {
 188                         force_redraw ();
 189                 }
 190         }
 191
 192         boost::weak_ptr<Content> _content;
 193         int _track;
 194         bool _selected;
 195
 196         boost::signals2::scoped_connection _content_connection;
 197 };
 198
 199 class AudioContentView : public ContentView
 200 {
 201 public:
 202         AudioContentView (Timeline& tl, shared_ptr<Content> c, int t)
 203                 : ContentView (tl, c, t)
 204         {}
 205
 206 private:
 207         wxString type () const
 208         {
 209                 return _("audio");
 210         }
 211
 212         wxColour colour () const
 213         {
 214                 return wxColour (149, 121, 232, 255);
 215         }
 216 };
 217
 218 class VideoContentView : public ContentView
 219 {
 220 public:
 221         VideoContentView (Timeline& tl, shared_ptr<Content> c, int t)
 222                 : ContentView (tl, c, t)
 223         {}
 224
 225 private:
 226
 227         wxString type () const
 228         {
 229                 return _("video");
 230         }
 231
 232         wxColour colour () const
 233         {
 234                 return wxColour (242, 92, 120, 255);
 235         }
 236 };
 237
 238 class TimeAxisView : public View
 239 {
 240 public:
 241         TimeAxisView (Timeline& tl, int y)
 242                 : View (tl)
 243                 , _y (y)
 244         {}
 245
 246         void do_paint (wxGraphicsContext* gc)
 247         {
 248 #if wxMAJOR_VERSION == 2 && wxMINOR_VERSION >= 9
 249                 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (0, 0, 0), 1, wxPENSTYLE_SOLID));
 250 #else
 251                 gc->SetPen (*wxThePenList->FindOrCreatePen (wxColour (0, 0, 0), 1, wxSOLID));
 252 #endif
 253
 254                 int mark_interval = rint (128 / (TIME_HZ * _timeline.pixels_per_time_unit ()));
 255                 if (mark_interval > 5) {
 256                         mark_interval -= mark_interval % 5;
 257                 }
 258                 if (mark_interval > 10) {
 259                         mark_interval -= mark_interval % 10;
 260                 }
 261                 if (mark_interval > 60) {
 262                         mark_interval -= mark_interval % 60;
 263                 }
 264                 if (mark_interval > 3600) {
 265                         mark_interval -= mark_interval % 3600;
 266                 }
 267
 268                 if (mark_interval < 1) {
 269                         mark_interval = 1;
 270                 }
 271
 272                 wxGraphicsPath path = gc->CreatePath ();
 273                 path.MoveToPoint (_timeline.x_offset(), _y);
 274                 path.AddLineToPoint (_timeline.width(), _y);
 275                 gc->StrokePath (path);
 276
 277                 Time t = 0;
 278                 while ((t * _timeline.pixels_per_time_unit()) < _timeline.width()) {
 279                         wxGraphicsPath path = gc->CreatePath ();
 280                         path.MoveToPoint (time_x (t), _y - 4);
 281                         path.AddLineToPoint (time_x (t), _y + 4);
 282                         gc->StrokePath (path);
 283
 284                         int tc = t / TIME_HZ;
 285                         int const h = tc / 3600;
 286                         tc -= h * 3600;
 287                         int const m = tc / 60;
 288                         tc -= m * 60;
 289                         int const s = tc;
 290
 291                         wxString str = wxString::Format (wxT ("%02d:%02d:%02d"), h, m, s);
 292                         wxDouble str_width;
 293                         wxDouble str_height;
 294                         wxDouble str_descent;
 295                         wxDouble str_leading;
 296                         gc->GetTextExtent (str, &str_width, &str_height, &str_descent, &str_leading);
 297
 298                         int const tx = _timeline.x_offset() + t * _timeline.pixels_per_time_unit();
 299                         if ((tx + str_width) < _timeline.width()) {
 300                                 gc->DrawText (str, time_x (t), _y + 16);
 301                         }
 302
 303                         t += mark_interval * TIME_HZ;
 304                 }
 305         }
 306
 307         Rect bbox () const
 308         {
 309                 return Rect (0, _y - 4, _timeline.width(), 24);
 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         , _tracks (0)
 321         , _pixels_per_time_unit (0)
 322         , _left_down (false)
 323         , _down_view_start (0)
 324         , _first_move (false)
 325 {
 326         SetDoubleBuffered (true);
 327
 328         setup_pixels_per_time_unit ();
 329
 330         Connect (wxID_ANY, wxEVT_PAINT, wxPaintEventHandler (Timeline::paint), 0, this);
 331         Connect (wxID_ANY, wxEVT_LEFT_DOWN, wxMouseEventHandler (Timeline::left_down), 0, this);
 332         Connect (wxID_ANY, wxEVT_LEFT_UP, wxMouseEventHandler (Timeline::left_up), 0, this);
 333         Connect (wxID_ANY, wxEVT_MOTION, wxMouseEventHandler (Timeline::mouse_moved), 0, this);
 334         Connect (wxID_ANY, wxEVT_SIZE, wxSizeEventHandler (Timeline::resized), 0, this);
 335
 336         playlist_changed ();
 337
 338         SetMinSize (wxSize (640, tracks() * track_height() + 96));
 339
 340         _playlist_connection = film->playlist()->Changed.connect (bind (&Timeline::playlist_changed, this));
 341 }
 342
 343 void
 344 Timeline::paint (wxPaintEvent &)
 345 {
 346         wxPaintDC dc (this);
 347
 348         wxGraphicsContext* gc = wxGraphicsContext::Create (dc);
 349         if (!gc) {
 350                 return;
 351         }
 352
 353         gc->SetFont (gc->CreateFont (*wxNORMAL_FONT));
 354
 355         for (list<shared_ptr<View> >::iterator i = _views.begin(); i != _views.end(); ++i) {
 356                 (*i)->paint (gc);
 357         }
 358
 359         delete gc;
 360 }
 361
 362 void
 363 Timeline::playlist_changed ()
 364 {
 365         shared_ptr<const Film> fl = _film.lock ();
 366         if (!fl) {
 367                 return;
 368         }
 369
 370         _views.clear ();
 371
 372         Playlist::ContentList content = fl->playlist()->content ();
 373
 374         for (Playlist::ContentList::iterator i = content.begin(); i != content.end(); ++i) {
 375                 if (dynamic_pointer_cast<VideoContent> (*i)) {
 376                         _views.push_back (shared_ptr<View> (new VideoContentView (*this, *i, 0)));
 377                 }
 378                 if (dynamic_pointer_cast<AudioContent> (*i)) {
 379                         _views.push_back (shared_ptr<View> (new AudioContentView (*this, *i, 0)));
 380                 }
 381         }
 382
 383         assign_tracks ();
 384
 385         _views.push_back (shared_ptr<View> (new TimeAxisView (*this, tracks() * track_height() + 32)));
 386
 387         Refresh ();
 388 }
 389
 390 void
 391 Timeline::assign_tracks ()
 392 {
 393         for (list<shared_ptr<View> >::iterator i = _views.begin(); i != _views.end(); ++i) {
 394                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*i);
 395                 if (cv) {
 396                         cv->set_track (0);
 397                 }
 398         }
 399
 400         for (list<shared_ptr<View> >::iterator i = _views.begin(); i != _views.end(); ++i) {
 401                 shared_ptr<AudioContentView> acv = dynamic_pointer_cast<AudioContentView> (*i);
 402                 if (!acv) {
 403                         continue;
 404                 }
 405
 406                 shared_ptr<Content> acv_content = acv->content().lock ();
 407                 assert (acv_content);
 408
 409                 int t = 1;
 410                 while (1) {
 411                         list<shared_ptr<View> >::iterator j = _views.begin();
 412                         while (j != _views.end()) {
 413                                 shared_ptr<AudioContentView> test = dynamic_pointer_cast<AudioContentView> (*j);
 414                                 if (!test) {
 415                                         ++j;
 416                                         continue;
 417                                 }
 418
 419                                 shared_ptr<Content> test_content = test->content().lock ();
 420                                 assert (test_content);
 421
 422                                 if (test && test->track() == t) {
 423                                         if ((acv_content->start() <= test_content->start() && test_content->start() <= acv_content->end()) ||
 424                                             (acv_content->start() <= test_content->end()   && test_content->end()   <= acv_content->end())) {
 425                                                 /* we have an overlap on track `t' */
 426                                                 ++t;
 427                                                 break;
 428                                         }
 429                                 }
 430
 431                                 ++j;
 432                         }
 433
 434                         if (j == _views.end ()) {
 435                                 /* no overlap on `t' */
 436                                 break;
 437                         }
 438                 }
 439
 440                 acv->set_track (t);
 441                 _tracks = max (_tracks, t + 1);
 442         }
 443 }
 444
 445 int
 446 Timeline::tracks () const
 447 {
 448         return _tracks;
 449 }
 450
 451 void
 452 Timeline::setup_pixels_per_time_unit ()
 453 {
 454         shared_ptr<const Film> film = _film.lock ();
 455         if (!film) {
 456                 return;
 457         }
 458
 459         _pixels_per_time_unit = static_cast<double>(width() - x_offset() * 2) / film->length();
 460 }
 461
 462 void
 463 Timeline::left_down (wxMouseEvent& ev)
 464 {
 465         list<shared_ptr<View> >::iterator i = _views.begin();
 466         Position const p (ev.GetX(), ev.GetY());
 467         while (i != _views.end() && !(*i)->bbox().contains (p)) {
 468                 ++i;
 469         }
 470
 471         _down_view.reset ();
 472
 473         if (i != _views.end ()) {
 474                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*i);
 475                 if (cv) {
 476                         _down_view = cv;
 477                         shared_ptr<Content> c = cv->content().lock();
 478                         assert (c);
 479                         _down_view_start = c->start ();
 480                 }
 481         }
 482
 483         for (list<shared_ptr<View> >::iterator j = _views.begin(); j != _views.end(); ++j) {
 484                 shared_ptr<ContentView> cv = dynamic_pointer_cast<ContentView> (*j);
 485                 if (cv) {
 486                         cv->set_selected (i == j);
 487                         if (i == j) {
 488                                 _film_editor->set_selection (cv->content ());
 489                         }
 490                 }
 491         }
 492
 493         _left_down = true;
 494         _down_point = ev.GetPosition ();
 495         _first_move = false;
 496 }
 497
 498 void
 499 Timeline::left_up (wxMouseEvent &)
 500 {
 501         _left_down = false;
 502 }
 503
 504 void
 505 Timeline::mouse_moved (wxMouseEvent& ev)
 506 {
 507         if (!_left_down) {
 508                 return;
 509         }
 510
 511         wxPoint const p = ev.GetPosition();
 512
 513         if (!_first_move) {
 514                 int const dist = sqrt (pow (p.x - _down_point.x, 2) + pow (p.y - _down_point.y, 2));
 515                 if (dist < 8) {
 516                         return;
 517                 }
 518                 _first_move = true;
 519         }
 520
 521         Time const time_diff = (p.x - _down_point.x) / _pixels_per_time_unit;
 522         if (_down_view) {
 523                 shared_ptr<Content> c = _down_view->content().lock();
 524                 if (c) {
 525                         c->set_start (max (static_cast<Time> (0), _down_view_start + time_diff));
 526
 527                         shared_ptr<Film> film = _film.lock ();
 528                         assert (film);
 529                         film->set_sequence_video (false);
 530                 }
 531         }
 532 }
 533
 534 void
 535 Timeline::force_redraw (Rect const & r)
 536 {
 537         RefreshRect (wxRect (r.x, r.y, r.width, r.height), false);
 538 }
 539
 540 shared_ptr<const Film>
 541 Timeline::film () const
 542 {
 543         return _film.lock ();
 544 }
 545
 546 void
 547 Timeline::resized (wxSizeEvent &)
 548 {
 549         setup_pixels_per_time_unit ();
 550 }