src/wx/timing_panel.cc

   1 /*
   2     Copyright (C) 2012-2018 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 "timing_panel.h"
  22 #include "wx_util.h"
  23 #include "film_viewer.h"
  24 #include "timecode.h"
  25 #include "content_panel.h"
  26 #include "move_to_dialog.h"
  27 #include "static_text.h"
  28 #include "dcpomatic_button.h"
  29 #include "lib/content.h"
  30 #include "lib/image_content.h"
  31 #include "lib/text_content.h"
  32 #include "lib/dcp_subtitle_content.h"
  33 #include "lib/audio_content.h"
  34 #include "lib/string_text_file_content.h"
  35 #include "lib/video_content.h"
  36 #include "lib/dcp_content.h"
  37 #include "lib/ffmpeg_content.h"
  38 #include <dcp/locale_convert.h>
  39 #include <boost/foreach.hpp>
  40 #include <set>
  41 #include <iostream>
  42
  43 using std::cout;
  44 using std::string;
  45 using std::set;
  46 using boost::shared_ptr;
  47 using boost::weak_ptr;
  48 using boost::dynamic_pointer_cast;
  49 using boost::optional;
  50 using dcp::locale_convert;
  51 using namespace dcpomatic;
  52
  53 TimingPanel::TimingPanel (ContentPanel* p, weak_ptr<FilmViewer> viewer)
  54         /* horrid hack for apparent lack of context support with wxWidgets i18n code */
  55         /// TRANSLATORS: translate the word "Timing" here; do not include the "Timing|" prefix
  56         : ContentSubPanel (p, S_("Timing|Timing"))
  57         , _viewer (viewer)
  58         , _film_content_changed_suspender (boost::bind(&TimingPanel::film_content_changed, this, _1))
  59 {
  60         wxSize size = TimecodeBase::size (this);
  61
  62         for (int i = 0; i < 3; ++i) {
  63                 _colon[i] = create_label (this, wxT(":"), false);
  64         }
  65
  66         //// TRANSLATORS: this is an abbreviation for "hours"
  67         _h_label = new StaticText (this, _("h"), wxDefaultPosition, size, wxALIGN_CENTRE_HORIZONTAL);
  68 #ifdef DCPOMATIC_LINUX
  69         /* Hack to work around failure to centre text on GTK */
  70         gtk_label_set_line_wrap (GTK_LABEL(_h_label->GetHandle()), FALSE);
  71 #endif
  72         //// TRANSLATORS: this is an abbreviation for "minutes"
  73         _m_label = new StaticText (this, _("m"), wxDefaultPosition, size, wxALIGN_CENTRE_HORIZONTAL);
  74 #ifdef DCPOMATIC_LINUX
  75         gtk_label_set_line_wrap (GTK_LABEL (_m_label->GetHandle()), FALSE);
  76 #endif
  77         //// TRANSLATORS: this is an abbreviation for "seconds"
  78         _s_label = new StaticText (this, _("s"), wxDefaultPosition, size, wxALIGN_CENTRE_HORIZONTAL);
  79 #ifdef DCPOMATIC_LINUX
  80         gtk_label_set_line_wrap (GTK_LABEL(_s_label->GetHandle()), FALSE);
  81 #endif
  82         //// TRANSLATORS: this is an abbreviation for "frames"
  83         _f_label = new StaticText (this, _("f"), wxDefaultPosition, size, wxALIGN_CENTRE_HORIZONTAL);
  84 #ifdef DCPOMATIC_LINUX
  85         gtk_label_set_line_wrap (GTK_LABEL(_f_label->GetHandle()), FALSE);
  86 #endif
  87
  88         _position_label = create_label (this, _("Position"), true);
  89         _position = new Timecode<DCPTime> (this);
  90         _move_to_start_of_reel = new Button (this, _("Move to start of reel"));
  91         _full_length_label = create_label (this, _("Full length"), true);
  92         _full_length = new Timecode<DCPTime> (this);
  93         _trim_start_label = create_label (this, _("Trim from start"), true);
  94         _trim_start = new Timecode<ContentTime> (this);
  95         _trim_start_to_playhead = new Button (this, _("Trim up to current position"));
  96         _trim_end_label = create_label (this, _("Trim from end"), true);
  97         _trim_end = new Timecode<ContentTime> (this);
  98         _trim_end_to_playhead = new Button (this, _("Trim after current position"));
  99         _play_length_label = create_label (this, _("Play length"), true);
 100         _play_length = new Timecode<DCPTime> (this);
 101
 102         _video_frame_rate_label = create_label (this, _("Video frame rate"), true);
 103         _video_frame_rate = new wxTextCtrl (this, wxID_ANY);
 104         _set_video_frame_rate = new Button (this, _("Set"));
 105         _set_video_frame_rate->Enable (false);
 106
 107         /* We can't use Wrap() here as it doesn't work with markup:
 108          * http://trac.wxwidgets.org/ticket/13389
 109          */
 110
 111         wxString in = _("<i>Only change this if the content's frame rate has been read incorrectly.</i>");
 112         wxString out;
 113         int const width = 20;
 114         int current = 0;
 115         for (size_t i = 0; i < in.Length(); ++i) {
 116                 if (in[i] == ' ' && current >= width) {
 117                         out += '\n';
 118                         current = 0;
 119                 } else {
 120                         out += in[i];
 121                         ++current;
 122                 }
 123         }
 124
 125         _tip = new StaticText (this, wxT (""));
 126         _tip->SetLabelMarkup (out);
 127 #ifdef DCPOMATIC_OSX
 128         /* Hack to stop hidden text on some versions of OS X */
 129         _tip->SetMinSize (wxSize (-1, 256));
 130 #endif
 131
 132         _position->Changed.connect    (boost::bind (&TimingPanel::position_changed, this));
 133         _move_to_start_of_reel->Bind  (wxEVT_BUTTON, boost::bind (&TimingPanel::move_to_start_of_reel_clicked, this));
 134         _full_length->Changed.connect (boost::bind (&TimingPanel::full_length_changed, this));
 135         _trim_start->Changed.connect  (boost::bind (&TimingPanel::trim_start_changed, this));
 136         _trim_start_to_playhead->Bind (wxEVT_BUTTON, boost::bind (&TimingPanel::trim_start_to_playhead_clicked, this));
 137         _trim_end->Changed.connect    (boost::bind (&TimingPanel::trim_end_changed, this));
 138         _trim_end_to_playhead->Bind   (wxEVT_BUTTON, boost::bind (&TimingPanel::trim_end_to_playhead_clicked, this));
 139         _play_length->Changed.connect (boost::bind (&TimingPanel::play_length_changed, this));
 140         _video_frame_rate->Bind       (wxEVT_TEXT, boost::bind (&TimingPanel::video_frame_rate_changed, this));
 141         _set_video_frame_rate->Bind   (wxEVT_BUTTON, boost::bind (&TimingPanel::set_video_frame_rate, this));
 142
 143         shared_ptr<FilmViewer> fv = _viewer.lock ();
 144         DCPOMATIC_ASSERT (fv);
 145         fv->ImageChanged.connect (boost::bind (&TimingPanel::setup_sensitivity, this));
 146
 147         setup_sensitivity ();
 148         add_to_grid ();
 149 }
 150
 151 void
 152 TimingPanel::add_to_grid ()
 153 {
 154         bool const full = Config::instance()->interface_complexity() == Config::INTERFACE_FULL;
 155
 156         int r = 0;
 157
 158         wxSizer* labels = new wxBoxSizer (wxHORIZONTAL);
 159         labels->Add (_h_label, 1, wxEXPAND);
 160         add_label_to_sizer (labels, _colon[0], false);
 161         labels->Add (_m_label, 1, wxEXPAND);
 162         add_label_to_sizer (labels, _colon[1], false);
 163         labels->Add (_s_label, 1, wxEXPAND);
 164         add_label_to_sizer (labels, _colon[2], false);
 165         labels->Add (_f_label, 1, wxEXPAND);
 166         _grid->Add (labels, wxGBPosition(r, 1));
 167         ++r;
 168
 169         add_label_to_sizer (_grid, _position_label, true, wxGBPosition(r, 0));
 170         _grid->Add (_position, wxGBPosition(r, 1));
 171         ++r;
 172
 173         _move_to_start_of_reel->Show (full);
 174         _full_length_label->Show (full);
 175         _full_length->Show (full);
 176         _play_length_label->Show (full);
 177         _play_length->Show (full);
 178         _video_frame_rate_label->Show (full);
 179         _video_frame_rate->Show (full);
 180         _set_video_frame_rate->Show (full);
 181         _tip->Show (full);
 182
 183         if (full) {
 184                 _grid->Add (_move_to_start_of_reel, wxGBPosition(r, 1));
 185                 ++r;
 186
 187                 add_label_to_sizer (_grid, _full_length_label, true, wxGBPosition(r, 0));
 188                 _grid->Add (_full_length, wxGBPosition(r, 1));
 189                 ++r;
 190         }
 191
 192         add_label_to_sizer (_grid, _trim_start_label, true, wxGBPosition(r, 0));
 193         _grid->Add (_trim_start, wxGBPosition(r, 1));
 194         ++r;
 195
 196         _grid->Add (_trim_start_to_playhead, wxGBPosition(r, 1));
 197         ++r;
 198
 199         add_label_to_sizer (_grid, _trim_end_label, true, wxGBPosition(r, 0));
 200         _grid->Add (_trim_end, wxGBPosition(r, 1));
 201         ++r;
 202
 203         _grid->Add (_trim_end_to_playhead, wxGBPosition(r, 1));
 204         ++r;
 205
 206         if (full) {
 207                 add_label_to_sizer (_grid, _play_length_label, true, wxGBPosition(r, 0));
 208                 _grid->Add (_play_length, wxGBPosition(r, 1));
 209                 ++r;
 210
 211                 {
 212                         add_label_to_sizer (_grid, _video_frame_rate_label, true, wxGBPosition(r, 0));
 213                         wxBoxSizer* s = new wxBoxSizer (wxHORIZONTAL);
 214                         s->Add (_video_frame_rate, 1, wxEXPAND);
 215                         s->Add (_set_video_frame_rate, 0, wxLEFT | wxRIGHT, 8);
 216                         _grid->Add (s, wxGBPosition(r, 1), wxGBSpan(1, 2));
 217                 }
 218                 ++r;
 219
 220                 _grid->Add (_tip, wxGBPosition(r, 1), wxGBSpan(1, 2));
 221         }
 222
 223         /* Completely speculative fix for #891 */
 224         _grid->Layout ();
 225 }
 226
 227 void
 228 TimingPanel::update_full_length ()
 229 {
 230         set<DCPTime> check;
 231         BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 232                 check.insert (i->full_length(_parent->film()));
 233         }
 234
 235         if (check.size() == 1) {
 236                 _full_length->set (_parent->selected().front()->full_length(_parent->film()), _parent->film()->video_frame_rate());
 237         } else {
 238                 _full_length->clear ();
 239         }
 240 }
 241
 242 void
 243 TimingPanel::update_play_length ()
 244 {
 245         set<DCPTime> check;
 246         BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 247                 check.insert (i->length_after_trim(_parent->film()));
 248         }
 249
 250         if (check.size() == 1) {
 251                 _play_length->set (_parent->selected().front()->length_after_trim(_parent->film()), _parent->film()->video_frame_rate());
 252         } else {
 253                 _play_length->clear ();
 254         }
 255 }
 256
 257 void
 258 TimingPanel::film_content_changed (int property)
 259 {
 260         if (_film_content_changed_suspender.check(property)) {
 261                 return;
 262         }
 263
 264         int const film_video_frame_rate = _parent->film()->video_frame_rate ();
 265
 266         /* Here we check to see if we have exactly one different value of various
 267            properties, and fill the controls with that value if so.
 268         */
 269
 270         if (property == ContentProperty::POSITION) {
 271
 272                 set<DCPTime> check;
 273                 BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 274                         check.insert (i->position ());
 275                 }
 276
 277                 if (check.size() == 1) {
 278                         _position->set (_parent->selected().front()->position(), film_video_frame_rate);
 279                 } else {
 280                         _position->clear ();
 281                 }
 282
 283         } else if (
 284                 property == ContentProperty::LENGTH ||
 285                 property == ContentProperty::VIDEO_FRAME_RATE ||
 286                 property == VideoContentProperty::FRAME_TYPE
 287                 ) {
 288
 289                 update_full_length ();
 290
 291         } else if (property == ContentProperty::TRIM_START) {
 292
 293                 set<ContentTime> check;
 294                 BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 295                         check.insert (i->trim_start ());
 296                 }
 297
 298                 if (check.size() == 1) {
 299                         _trim_start->set (_parent->selected().front()->trim_start (), film_video_frame_rate);
 300                 } else {
 301                         _trim_start->clear ();
 302                 }
 303
 304         } else if (property == ContentProperty::TRIM_END) {
 305
 306                 set<ContentTime> check;
 307                 BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 308                         check.insert (i->trim_end ());
 309                 }
 310
 311                 if (check.size() == 1) {
 312                         _trim_end->set (_parent->selected().front()->trim_end (), film_video_frame_rate);
 313                 } else {
 314                         _trim_end->clear ();
 315                 }
 316         }
 317
 318         if (
 319                 property == ContentProperty::LENGTH ||
 320                 property == ContentProperty::TRIM_START ||
 321                 property == ContentProperty::TRIM_END ||
 322                 property == ContentProperty::VIDEO_FRAME_RATE ||
 323                 property == VideoContentProperty::FRAME_TYPE
 324                 ) {
 325
 326                 update_play_length ();
 327         }
 328
 329         if (property == ContentProperty::VIDEO_FRAME_RATE) {
 330                 set<double> check_vc;
 331                 shared_ptr<const Content> content;
 332                 int count_ac = 0;
 333                 int count_sc = 0;
 334                 BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 335                         if (i->video && i->video_frame_rate()) {
 336                                 check_vc.insert (i->video_frame_rate().get());
 337                                 content = i;
 338                         }
 339                         if (i->audio && i->video_frame_rate()) {
 340                                 ++count_ac;
 341                                 content = i;
 342                         }
 343                         if (!i->text.empty() && i->video_frame_rate()) {
 344                                 ++count_sc;
 345                                 content = i;
 346                         }
 347
 348                 }
 349
 350                 bool const single_frame_image_content = content && dynamic_pointer_cast<const ImageContent> (content) && content->number_of_paths() == 1;
 351
 352                 if ((check_vc.size() == 1 || count_ac == 1 || count_sc == 1) && !single_frame_image_content) {
 353                         checked_set (_video_frame_rate, locale_convert<string> (content->video_frame_rate().get(), 5));
 354                         _video_frame_rate->Enable (true);
 355                 } else {
 356                         checked_set (_video_frame_rate, wxT (""));
 357                         _video_frame_rate->Enable (false);
 358                 }
 359         }
 360
 361         bool have_still = false;
 362         BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 363                 shared_ptr<const ImageContent> ic = dynamic_pointer_cast<const ImageContent> (i);
 364                 if (ic && ic->still ()) {
 365                         have_still = true;
 366                 }
 367         }
 368
 369         _full_length->set_editable (have_still);
 370         _play_length->set_editable (!have_still);
 371         _set_video_frame_rate->Enable (false);
 372         setup_sensitivity ();
 373 }
 374
 375 void
 376 TimingPanel::position_changed ()
 377 {
 378         DCPTime const pos = _position->get (_parent->film()->video_frame_rate ());
 379         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 380                 i->set_position (_parent->film(), pos);
 381         }
 382 }
 383
 384 void
 385 TimingPanel::full_length_changed ()
 386 {
 387         int const vfr = _parent->film()->video_frame_rate ();
 388         Frame const len = _full_length->get (vfr).frames_round (vfr);
 389         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 390                 shared_ptr<ImageContent> ic = dynamic_pointer_cast<ImageContent> (i);
 391                 if (ic && ic->still ()) {
 392                         ic->video->set_length (len);
 393                 }
 394         }
 395 }
 396
 397 void
 398 TimingPanel::trim_start_changed ()
 399 {
 400         shared_ptr<FilmViewer> fv = _viewer.lock ();
 401         if (!fv) {
 402                 return;
 403         }
 404
 405         DCPTime const ph = fv->position ();
 406
 407         fv->set_coalesce_player_changes (true);
 408
 409         shared_ptr<Content> ref;
 410         optional<FrameRateChange> ref_frc;
 411         optional<DCPTime> ref_ph;
 412
 413         Suspender::Block bl = _film_content_changed_suspender.block ();
 414         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 415                 if (i->position() <= ph && ph < i->end(_parent->film())) {
 416                         /* The playhead is in i.  Use it as a reference to work out
 417                            where to put the playhead post-trim; we're trying to keep the playhead
 418                            at the same frame of content that we're looking at pre-trim.
 419                         */
 420                         ref = i;
 421                         ref_frc = _parent->film()->active_frame_rate_change (i->position ());
 422                         ref_ph = ph - i->position() + DCPTime (i->trim_start(), ref_frc.get());
 423                 }
 424
 425                 ContentTime const trim = _trim_start->get (i->video_frame_rate().get_value_or(_parent->film()->video_frame_rate()));
 426                 i->set_trim_start (trim);
 427         }
 428
 429         if (ref) {
 430                 fv->seek (max(DCPTime(), ref_ph.get() + ref->position() - DCPTime(ref->trim_start(), ref_frc.get())), true);
 431         }
 432
 433         fv->set_coalesce_player_changes (false);
 434 }
 435
 436 void
 437 TimingPanel::trim_end_changed ()
 438 {
 439         shared_ptr<FilmViewer> fv = _viewer.lock ();
 440         if (!fv) {
 441                 return;
 442         }
 443
 444         fv->set_coalesce_player_changes (true);
 445
 446         Suspender::Block bl = _film_content_changed_suspender.block ();
 447         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 448                 ContentTime const trim = _trim_end->get (i->video_frame_rate().get_value_or(_parent->film()->video_frame_rate()));
 449                 i->set_trim_end (trim);
 450         }
 451
 452         /* XXX: maybe playhead-off-the-end-of-the-film should be handled elsewhere */
 453         if (fv->position() >= _parent->film()->length()) {
 454                 fv->seek (_parent->film()->length() - DCPTime::from_frames(1, _parent->film()->video_frame_rate()), true);
 455         }
 456
 457         fv->set_coalesce_player_changes (false);
 458 }
 459
 460 void
 461 TimingPanel::play_length_changed ()
 462 {
 463         DCPTime const play_length = _play_length->get (_parent->film()->video_frame_rate());
 464         Suspender::Block bl = _film_content_changed_suspender.block ();
 465         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 466                 FrameRateChange const frc = _parent->film()->active_frame_rate_change (i->position ());
 467                 i->set_trim_end (
 468                         ContentTime (max(DCPTime(), i->full_length(_parent->film()) - play_length), frc) - i->trim_start()
 469                         );
 470         }
 471 }
 472
 473 void
 474 TimingPanel::video_frame_rate_changed ()
 475 {
 476         bool enable = true;
 477         if (_video_frame_rate->GetValue() == wxT("")) {
 478                 /* No frame rate has been entered; if the user clicks "set" now it would unset the video
 479                    frame rate in the selected content.  This can't be allowed for some content types.
 480                 */
 481                 BOOST_FOREACH (shared_ptr<Content> i, _parent->selected()) {
 482                         if (
 483                                 dynamic_pointer_cast<DCPContent>(i) ||
 484                                 dynamic_pointer_cast<FFmpegContent>(i)
 485                                 ) {
 486                                 enable = false;
 487                         }
 488                 }
 489         }
 490
 491         _set_video_frame_rate->Enable (enable);
 492 }
 493
 494 void
 495 TimingPanel::set_video_frame_rate ()
 496 {
 497         optional<double> fr;
 498         if (_video_frame_rate->GetValue() != wxT("")) {
 499                 fr = locale_convert<double> (wx_to_std (_video_frame_rate->GetValue ()));
 500         }
 501         Suspender::Block bl = _film_content_changed_suspender.block ();
 502         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 503                 if (fr) {
 504                         i->set_video_frame_rate (*fr);
 505                 } else {
 506                         i->unset_video_frame_rate ();
 507                 }
 508         }
 509
 510         _set_video_frame_rate->Enable (false);
 511 }
 512
 513 void
 514 TimingPanel::content_selection_changed ()
 515 {
 516         setup_sensitivity ();
 517
 518         film_content_changed (ContentProperty::POSITION);
 519         film_content_changed (ContentProperty::LENGTH);
 520         film_content_changed (ContentProperty::TRIM_START);
 521         film_content_changed (ContentProperty::TRIM_END);
 522         film_content_changed (ContentProperty::VIDEO_FRAME_RATE);
 523 }
 524
 525 void
 526 TimingPanel::film_changed (Film::Property p)
 527 {
 528         if (p == Film::VIDEO_FRAME_RATE) {
 529                 update_full_length ();
 530                 update_play_length ();
 531         }
 532 }
 533
 534 void
 535 TimingPanel::trim_start_to_playhead_clicked ()
 536 {
 537         shared_ptr<FilmViewer> fv = _viewer.lock ();
 538         if (!fv) {
 539                 return;
 540         }
 541
 542         shared_ptr<const Film> film = _parent->film ();
 543         DCPTime const ph = fv->position().floor (film->video_frame_rate ());
 544         optional<DCPTime> new_ph;
 545
 546         fv->set_coalesce_player_changes (true);
 547
 548         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 549                 if (i->position() < ph && ph < i->end(film)) {
 550                         FrameRateChange const frc = film->active_frame_rate_change (i->position());
 551                         i->set_trim_start (i->trim_start() + ContentTime (ph - i->position(), frc));
 552                         new_ph = i->position ();
 553                 }
 554         }
 555
 556         if (new_ph) {
 557                 fv->seek (new_ph.get(), true);
 558         }
 559
 560         fv->set_coalesce_player_changes (false);
 561 }
 562
 563 void
 564 TimingPanel::trim_end_to_playhead_clicked ()
 565 {
 566         shared_ptr<FilmViewer> fv = _viewer.lock ();
 567         if (!fv) {
 568                 return;
 569         }
 570
 571         shared_ptr<const Film> film = _parent->film ();
 572         DCPTime const ph = fv->position().floor (film->video_frame_rate ());
 573         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 574                 if (i->position() < ph && ph < i->end(film)) {
 575                         FrameRateChange const frc = film->active_frame_rate_change (i->position ());
 576                         i->set_trim_end (ContentTime(i->position() + i->full_length(film) - ph - DCPTime::from_frames(1, frc.dcp), frc) - i->trim_start());
 577                 }
 578         }
 579 }
 580
 581 void
 582 TimingPanel::setup_sensitivity ()
 583 {
 584         bool const e = !_parent->selected().empty ();
 585
 586         _position->Enable (e);
 587         _move_to_start_of_reel->Enable (e);
 588         _full_length->Enable (e);
 589         _trim_start->Enable (e);
 590         _trim_end->Enable (e);
 591         _play_length->Enable (e);
 592         _video_frame_rate->Enable (e);
 593
 594         shared_ptr<FilmViewer> fv = _viewer.lock ();
 595         DCPOMATIC_ASSERT (fv);
 596         DCPTime const ph = fv->position ();
 597         bool any_over_ph = false;
 598         BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 599                 if (i->position() <= ph && ph < i->end(_parent->film())) {
 600                         any_over_ph = true;
 601                 }
 602         }
 603
 604         _trim_start_to_playhead->Enable (any_over_ph);
 605         _trim_end_to_playhead->Enable (any_over_ph);
 606 }
 607
 608 void
 609 TimingPanel::move_to_start_of_reel_clicked ()
 610 {
 611         /* Find common position of all selected content, if it exists */
 612
 613         optional<DCPTime> position;
 614         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 615                 if (!position) {
 616                         position = i->position();
 617                 } else {
 618                         if (position.get() != i->position()) {
 619                                 position.reset ();
 620                                 break;
 621                         }
 622                 }
 623         }
 624
 625         MoveToDialog* d = new MoveToDialog (this, position, _parent->film());
 626
 627         if (d->ShowModal() == wxID_OK) {
 628                 BOOST_FOREACH (shared_ptr<Content> i, _parent->selected()) {
 629                         i->set_position (_parent->film(), d->position());
 630                 }
 631         }
 632         d->Destroy ();
 633 }