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