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 {
  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         int const film_video_frame_rate = _parent->film()->video_frame_rate ();
 260
 261         /* Here we check to see if we have exactly one different value of various
 262            properties, and fill the controls with that value if so.
 263         */
 264
 265         if (property == ContentProperty::POSITION) {
 266
 267                 set<DCPTime> check;
 268                 BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 269                         check.insert (i->position ());
 270                 }
 271
 272                 if (check.size() == 1) {
 273                         _position->set (_parent->selected().front()->position(), film_video_frame_rate);
 274                 } else {
 275                         _position->clear ();
 276                 }
 277
 278         } else if (
 279                 property == ContentProperty::LENGTH ||
 280                 property == ContentProperty::VIDEO_FRAME_RATE ||
 281                 property == VideoContentProperty::FRAME_TYPE
 282                 ) {
 283
 284                 update_full_length ();
 285
 286         } else if (property == ContentProperty::TRIM_START) {
 287
 288                 set<ContentTime> check;
 289                 BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 290                         check.insert (i->trim_start ());
 291                 }
 292
 293                 if (check.size() == 1) {
 294                         _trim_start->set (_parent->selected().front()->trim_start (), film_video_frame_rate);
 295                 } else {
 296                         _trim_start->clear ();
 297                 }
 298
 299         } else if (property == ContentProperty::TRIM_END) {
 300
 301                 set<ContentTime> check;
 302                 BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 303                         check.insert (i->trim_end ());
 304                 }
 305
 306                 if (check.size() == 1) {
 307                         _trim_end->set (_parent->selected().front()->trim_end (), film_video_frame_rate);
 308                 } else {
 309                         _trim_end->clear ();
 310                 }
 311         }
 312
 313         if (
 314                 property == ContentProperty::LENGTH ||
 315                 property == ContentProperty::TRIM_START ||
 316                 property == ContentProperty::TRIM_END ||
 317                 property == ContentProperty::VIDEO_FRAME_RATE ||
 318                 property == VideoContentProperty::FRAME_TYPE
 319                 ) {
 320
 321                 update_play_length ();
 322         }
 323
 324         if (property == ContentProperty::VIDEO_FRAME_RATE) {
 325                 set<double> check_vc;
 326                 shared_ptr<const Content> content;
 327                 int count_ac = 0;
 328                 int count_sc = 0;
 329                 BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 330                         if (i->video && i->video_frame_rate()) {
 331                                 check_vc.insert (i->video_frame_rate().get());
 332                                 content = i;
 333                         }
 334                         if (i->audio && i->video_frame_rate()) {
 335                                 ++count_ac;
 336                                 content = i;
 337                         }
 338                         if (!i->text.empty() && i->video_frame_rate()) {
 339                                 ++count_sc;
 340                                 content = i;
 341                         }
 342
 343                 }
 344
 345                 bool const single_frame_image_content = content && dynamic_pointer_cast<const ImageContent> (content) && content->number_of_paths() == 1;
 346
 347                 if ((check_vc.size() == 1 || count_ac == 1 || count_sc == 1) && !single_frame_image_content) {
 348                         checked_set (_video_frame_rate, locale_convert<string> (content->video_frame_rate().get(), 5));
 349                         _video_frame_rate->Enable (true);
 350                 } else {
 351                         checked_set (_video_frame_rate, wxT (""));
 352                         _video_frame_rate->Enable (false);
 353                 }
 354         }
 355
 356         bool have_still = false;
 357         BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 358                 shared_ptr<const ImageContent> ic = dynamic_pointer_cast<const ImageContent> (i);
 359                 if (ic && ic->still ()) {
 360                         have_still = true;
 361                 }
 362         }
 363
 364         _full_length->set_editable (have_still);
 365         _play_length->set_editable (!have_still);
 366         _set_video_frame_rate->Enable (false);
 367         setup_sensitivity ();
 368 }
 369
 370 void
 371 TimingPanel::position_changed ()
 372 {
 373         DCPTime const pos = _position->get (_parent->film()->video_frame_rate ());
 374         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 375                 i->set_position (_parent->film(), pos);
 376         }
 377 }
 378
 379 void
 380 TimingPanel::full_length_changed ()
 381 {
 382         int const vfr = _parent->film()->video_frame_rate ();
 383         Frame const len = _full_length->get (vfr).frames_round (vfr);
 384         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 385                 shared_ptr<ImageContent> ic = dynamic_pointer_cast<ImageContent> (i);
 386                 if (ic && ic->still ()) {
 387                         ic->video->set_length (len);
 388                 }
 389         }
 390 }
 391
 392 void
 393 TimingPanel::trim_start_changed ()
 394 {
 395         shared_ptr<FilmViewer> fv = _viewer.lock ();
 396         if (!fv) {
 397                 return;
 398         }
 399
 400         DCPTime const ph = fv->position ();
 401
 402         fv->set_coalesce_player_changes (true);
 403
 404         shared_ptr<Content> ref;
 405         optional<FrameRateChange> ref_frc;
 406         optional<DCPTime> ref_ph;
 407
 408
 409         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 410                 if (i->position() <= ph && ph < i->end(_parent->film())) {
 411                         /* The playhead is in i.  Use it as a reference to work out
 412                            where to put the playhead post-trim; we're trying to keep the playhead
 413                            at the same frame of content that we're looking at pre-trim.
 414                         */
 415                         ref = i;
 416                         ref_frc = _parent->film()->active_frame_rate_change (i->position ());
 417                         ref_ph = ph - i->position() + DCPTime (i->trim_start(), ref_frc.get());
 418                 }
 419
 420                 ContentTime const trim = _trim_start->get (i->video_frame_rate().get_value_or(_parent->film()->video_frame_rate()));
 421                 i->set_trim_start (trim);
 422         }
 423
 424         if (ref) {
 425                 fv->seek (max(DCPTime(), ref_ph.get() + ref->position() - DCPTime(ref->trim_start(), ref_frc.get())), true);
 426         }
 427
 428         fv->set_coalesce_player_changes (false);
 429 }
 430
 431 void
 432 TimingPanel::trim_end_changed ()
 433 {
 434         shared_ptr<FilmViewer> fv = _viewer.lock ();
 435         if (!fv) {
 436                 return;
 437         }
 438
 439         fv->set_coalesce_player_changes (true);
 440
 441         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 442                 ContentTime const trim = _trim_end->get (i->video_frame_rate().get_value_or(_parent->film()->video_frame_rate()));
 443                 i->set_trim_end (trim);
 444         }
 445
 446         /* XXX: maybe playhead-off-the-end-of-the-film should be handled elsewhere */
 447         if (fv->position() >= _parent->film()->length()) {
 448                 fv->seek (_parent->film()->length() - DCPTime::from_frames(1, _parent->film()->video_frame_rate()), true);
 449         }
 450
 451         fv->set_coalesce_player_changes (false);
 452 }
 453
 454 void
 455 TimingPanel::play_length_changed ()
 456 {
 457         DCPTime const play_length = _play_length->get (_parent->film()->video_frame_rate());
 458         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 459                 FrameRateChange const frc = _parent->film()->active_frame_rate_change (i->position ());
 460                 i->set_trim_end (
 461                         ContentTime (max(DCPTime(), i->full_length(_parent->film()) - play_length), frc) - i->trim_start()
 462                         );
 463         }
 464 }
 465
 466 void
 467 TimingPanel::video_frame_rate_changed ()
 468 {
 469         bool enable = true;
 470         if (_video_frame_rate->GetValue() == wxT("")) {
 471                 /* No frame rate has been entered; if the user clicks "set" now it would unset the video
 472                    frame rate in the selected content.  This can't be allowed for some content types.
 473                 */
 474                 BOOST_FOREACH (shared_ptr<Content> i, _parent->selected()) {
 475                         if (
 476                                 dynamic_pointer_cast<DCPContent>(i) ||
 477                                 dynamic_pointer_cast<FFmpegContent>(i)
 478                                 ) {
 479                                 enable = false;
 480                         }
 481                 }
 482         }
 483
 484         _set_video_frame_rate->Enable (enable);
 485 }
 486
 487 void
 488 TimingPanel::set_video_frame_rate ()
 489 {
 490         optional<double> fr;
 491         if (_video_frame_rate->GetValue() != wxT("")) {
 492                 fr = locale_convert<double> (wx_to_std (_video_frame_rate->GetValue ()));
 493         }
 494         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 495                 if (fr) {
 496                         i->set_video_frame_rate (*fr);
 497                 } else {
 498                         i->unset_video_frame_rate ();
 499                 }
 500         }
 501
 502         _set_video_frame_rate->Enable (false);
 503 }
 504
 505 void
 506 TimingPanel::content_selection_changed ()
 507 {
 508         setup_sensitivity ();
 509
 510         film_content_changed (ContentProperty::POSITION);
 511         film_content_changed (ContentProperty::LENGTH);
 512         film_content_changed (ContentProperty::TRIM_START);
 513         film_content_changed (ContentProperty::TRIM_END);
 514         film_content_changed (ContentProperty::VIDEO_FRAME_RATE);
 515 }
 516
 517 void
 518 TimingPanel::film_changed (Film::Property p)
 519 {
 520         if (p == Film::VIDEO_FRAME_RATE) {
 521                 update_full_length ();
 522                 update_play_length ();
 523         }
 524 }
 525
 526 void
 527 TimingPanel::trim_start_to_playhead_clicked ()
 528 {
 529         shared_ptr<FilmViewer> fv = _viewer.lock ();
 530         if (!fv) {
 531                 return;
 532         }
 533
 534         shared_ptr<const Film> film = _parent->film ();
 535         DCPTime const ph = fv->position().floor (film->video_frame_rate ());
 536         optional<DCPTime> new_ph;
 537
 538         fv->set_coalesce_player_changes (true);
 539
 540         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 541                 if (i->position() < ph && ph < i->end(film)) {
 542                         FrameRateChange const frc = film->active_frame_rate_change (i->position());
 543                         i->set_trim_start (i->trim_start() + ContentTime (ph - i->position(), frc));
 544                         new_ph = i->position ();
 545                 }
 546         }
 547
 548         if (new_ph) {
 549                 fv->seek (new_ph.get(), true);
 550         }
 551
 552         fv->set_coalesce_player_changes (false);
 553 }
 554
 555 void
 556 TimingPanel::trim_end_to_playhead_clicked ()
 557 {
 558         shared_ptr<FilmViewer> fv = _viewer.lock ();
 559         if (!fv) {
 560                 return;
 561         }
 562
 563         shared_ptr<const Film> film = _parent->film ();
 564         DCPTime const ph = fv->position().floor (film->video_frame_rate ());
 565         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 566                 if (i->position() < ph && ph < i->end(film)) {
 567                         FrameRateChange const frc = film->active_frame_rate_change (i->position ());
 568                         i->set_trim_end (ContentTime(i->position() + i->full_length(film) - ph - DCPTime::from_frames(1, frc.dcp), frc) - i->trim_start());
 569                 }
 570         }
 571 }
 572
 573 void
 574 TimingPanel::setup_sensitivity ()
 575 {
 576         bool const e = !_parent->selected().empty ();
 577
 578         _position->Enable (e);
 579         _move_to_start_of_reel->Enable (e);
 580         _full_length->Enable (e);
 581         _trim_start->Enable (e);
 582         _trim_end->Enable (e);
 583         _play_length->Enable (e);
 584         _video_frame_rate->Enable (e);
 585
 586         shared_ptr<FilmViewer> fv = _viewer.lock ();
 587         DCPOMATIC_ASSERT (fv);
 588         DCPTime const ph = fv->position ();
 589         bool any_over_ph = false;
 590         BOOST_FOREACH (shared_ptr<const Content> i, _parent->selected ()) {
 591                 if (i->position() <= ph && ph < i->end(_parent->film())) {
 592                         any_over_ph = true;
 593                 }
 594         }
 595
 596         _trim_start_to_playhead->Enable (any_over_ph);
 597         _trim_end_to_playhead->Enable (any_over_ph);
 598 }
 599
 600 void
 601 TimingPanel::move_to_start_of_reel_clicked ()
 602 {
 603         /* Find common position of all selected content, if it exists */
 604
 605         optional<DCPTime> position;
 606         BOOST_FOREACH (shared_ptr<Content> i, _parent->selected ()) {
 607                 if (!position) {
 608                         position = i->position();
 609                 } else {
 610                         if (position.get() != i->position()) {
 611                                 position.reset ();
 612                                 break;
 613                         }
 614                 }
 615         }
 616
 617         MoveToDialog* d = new MoveToDialog (this, position, _parent->film());
 618
 619         if (d->ShowModal() == wxID_OK) {
 620                 BOOST_FOREACH (shared_ptr<Content> i, _parent->selected()) {
 621                         i->set_position (_parent->film(), d->position());
 622                 }
 623         }
 624         d->Destroy ();
 625 }