src/wx/screens_panel.cc

   1 /*
   2     Copyright (C) 2015-2022 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
  22 #include "cinema_dialog.h"
  23 #include "dcpomatic_button.h"
  24 #include "screen_dialog.h"
  25 #include "screens_panel.h"
  26 #include "wx_util.h"
  27 #include "lib/cinema.h"
  28 #include "lib/config.h"
  29 #include "lib/scope_guard.h"
  30 #include "lib/screen.h"
  31 #include "lib/timer.h"
  32
  33
  34 using std::cout;
  35 using std::make_pair;
  36 using std::make_shared;
  37 using std::map;
  38 using std::pair;
  39 using std::shared_ptr;
  40 using std::string;
  41 using std::vector;
  42 using boost::optional;
  43 #if BOOST_VERSION >= 106100
  44 using namespace boost::placeholders;
  45 #endif
  46 using namespace dcpomatic;
  47
  48
  49 ScreensPanel::ScreensPanel (wxWindow* parent)
  50         : wxPanel (parent, wxID_ANY)
  51 {
  52         auto sizer = new wxBoxSizer (wxVERTICAL);
  53
  54         _search = new wxSearchCtrl (this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxSize(200, search_ctrl_height()));
  55 #ifndef __WXGTK3__
  56         /* The cancel button seems to be strangely broken in GTK3; clicking on it twice sometimes works */
  57         _search->ShowCancelButton (true);
  58 #endif
  59         sizer->Add (_search, 0, wxBOTTOM, DCPOMATIC_SIZER_GAP);
  60
  61         auto targets = new wxBoxSizer (wxHORIZONTAL);
  62         _targets = new wxTreeListCtrl (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTL_MULTIPLE | wxTL_3STATE | wxTL_NO_HEADER);
  63         _targets->AppendColumn (wxT("foo"));
  64
  65         targets->Add (_targets, 1, wxEXPAND | wxRIGHT, DCPOMATIC_SIZER_GAP);
  66
  67         add_cinemas ();
  68
  69         auto side_buttons = new wxBoxSizer (wxVERTICAL);
  70
  71         auto target_buttons = new wxBoxSizer (wxVERTICAL);
  72
  73         _add_cinema = new Button (this, _("Add Cinema..."));
  74         target_buttons->Add (_add_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  75         _edit_cinema = new Button (this, _("Edit Cinema..."));
  76         target_buttons->Add (_edit_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  77         _remove_cinema = new Button (this, _("Remove Cinema"));
  78         target_buttons->Add (_remove_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  79         _add_screen = new Button (this, _("Add Screen..."));
  80         target_buttons->Add (_add_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  81         _edit_screen = new Button (this, _("Edit Screen..."));
  82         target_buttons->Add (_edit_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  83         _remove_screen = new Button (this, _("Remove Screen"));
  84         target_buttons->Add (_remove_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  85
  86         side_buttons->Add (target_buttons, 0, 0);
  87
  88         auto check_buttons = new wxBoxSizer (wxVERTICAL);
  89
  90         _check_all = new Button (this, _("Check all"));
  91         check_buttons->Add (_check_all, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  92         _uncheck_all = new Button (this, _("Uncheck all"));
  93         check_buttons->Add (_uncheck_all, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  94
  95         side_buttons->Add (check_buttons, 1, wxEXPAND | wxTOP, DCPOMATIC_BUTTON_STACK_GAP * 8);
  96
  97         targets->Add (side_buttons, 0, 0);
  98
  99         sizer->Add (targets, 1, wxEXPAND);
 100
 101         _search->Bind        (wxEVT_TEXT, boost::bind (&ScreensPanel::search_changed, this));
 102         _targets->Bind       (wxEVT_TREELIST_SELECTION_CHANGED, &ScreensPanel::selection_changed_shim, this);
 103         _targets->Bind       (wxEVT_TREELIST_ITEM_CHECKED, &ScreensPanel::checkbox_changed, this);
 104
 105         _add_cinema->Bind    (wxEVT_BUTTON, boost::bind (&ScreensPanel::add_cinema_clicked, this));
 106         _edit_cinema->Bind   (wxEVT_BUTTON, boost::bind (&ScreensPanel::edit_cinema_clicked, this));
 107         _remove_cinema->Bind (wxEVT_BUTTON, boost::bind (&ScreensPanel::remove_cinema_clicked, this));
 108
 109         _add_screen->Bind    (wxEVT_BUTTON, boost::bind (&ScreensPanel::add_screen_clicked, this));
 110         _edit_screen->Bind   (wxEVT_BUTTON, boost::bind (&ScreensPanel::edit_screen_clicked, this));
 111         _remove_screen->Bind (wxEVT_BUTTON, boost::bind (&ScreensPanel::remove_screen_clicked, this));
 112
 113         _check_all->Bind     (wxEVT_BUTTON, boost::bind(&ScreensPanel::check_all, this));
 114         _uncheck_all->Bind   (wxEVT_BUTTON, boost::bind(&ScreensPanel::uncheck_all, this));
 115
 116         SetSizer (sizer);
 117
 118         _config_connection = Config::instance()->Changed.connect(boost::bind(&ScreensPanel::config_changed, this, _1));
 119 }
 120
 121
 122 ScreensPanel::~ScreensPanel ()
 123 {
 124         _targets->Unbind (wxEVT_TREELIST_SELECTION_CHANGED, &ScreensPanel::selection_changed_shim, this);
 125         _targets->Unbind (wxEVT_TREELIST_ITEM_CHECKED, &ScreensPanel::checkbox_changed, this);
 126 }
 127
 128
 129 void
 130 ScreensPanel::check_all ()
 131 {
 132         for (auto cinema = _targets->GetFirstChild(_targets->GetRootItem()); cinema.IsOk();  cinema = _targets->GetNextSibling(cinema)) {
 133                 _targets->CheckItem(cinema, wxCHK_CHECKED);
 134                 for (auto screen = _targets->GetFirstChild(cinema); screen.IsOk(); screen = _targets->GetNextSibling(screen)) {
 135                         _targets->CheckItem(screen, wxCHK_CHECKED);
 136                         set_screen_checked(screen, true);
 137                 }
 138         }
 139 }
 140
 141
 142 void
 143 ScreensPanel::uncheck_all ()
 144 {
 145         for (auto cinema = _targets->GetFirstChild(_targets->GetRootItem()); cinema.IsOk();  cinema = _targets->GetNextSibling(cinema)) {
 146                 _targets->CheckItem(cinema, wxCHK_UNCHECKED);
 147                 for (auto screen = _targets->GetFirstChild(cinema); screen.IsOk(); screen = _targets->GetNextSibling(screen)) {
 148                         _targets->CheckItem(screen, wxCHK_UNCHECKED);
 149                         set_screen_checked(screen, false);
 150                 }
 151         }
 152 }
 153
 154
 155 void
 156 ScreensPanel::setup_sensitivity ()
 157 {
 158         bool const sc = _selected_cinemas.size() == 1;
 159         bool const ss = _selected_screens.size() == 1;
 160
 161         _edit_cinema->Enable (sc || ss);
 162         _remove_cinema->Enable (_selected_cinemas.size() >= 1);
 163
 164         _add_screen->Enable (sc || ss);
 165         _edit_screen->Enable (ss);
 166         _remove_screen->Enable (_selected_screens.size() >= 1);
 167 }
 168
 169
 170 optional<wxTreeListItem>
 171 ScreensPanel::add_cinema (shared_ptr<Cinema> cinema, wxTreeListItem previous)
 172 {
 173         auto search = wx_to_std (_search->GetValue ());
 174         transform (search.begin(), search.end(), search.begin(), ::tolower);
 175
 176         if (!search.empty ()) {
 177                 auto name = cinema->name;
 178                 transform (name.begin(), name.end(), name.begin(), ::tolower);
 179                 if (name.find (search) == string::npos) {
 180                         return {};
 181                 }
 182         }
 183
 184         auto id = _targets->InsertItem(_targets->GetRootItem(), previous, std_to_wx(cinema->name));
 185
 186         _item_to_cinema[id] = cinema;
 187         _cinema_to_item[cinema] = id;
 188
 189         for (auto screen: cinema->screens()) {
 190                 add_screen (cinema, screen);
 191         }
 192
 193         return id;
 194 }
 195
 196
 197 optional<wxTreeListItem>
 198 ScreensPanel::add_screen (shared_ptr<Cinema> cinema, shared_ptr<Screen> screen)
 199 {
 200         auto item = cinema_to_item(cinema);
 201         if (!item) {
 202                 return {};
 203         }
 204
 205         auto id = _targets->AppendItem(*item, std_to_wx(screen->name));
 206
 207         _item_to_screen[id] = screen;
 208         _screen_to_item[screen] = id;
 209
 210         return item;
 211 }
 212
 213
 214 void
 215 ScreensPanel::add_cinema_clicked ()
 216 {
 217         auto dialog = new CinemaDialog (GetParent(), _("Add Cinema"));
 218         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 219
 220         if (dialog->ShowModal() == wxID_OK) {
 221                 auto cinema = make_shared<Cinema>(dialog->name(), dialog->emails(), dialog->notes(), dialog->utc_offset_hour(), dialog->utc_offset_minute());
 222
 223                 auto cinemas = Config::instance()->cinemas();
 224                 cinemas.sort(
 225                         [this](shared_ptr<Cinema> a, shared_ptr<Cinema> b) { return _collator.compare(a->name, b->name) < 0; }
 226                         );
 227
 228                 try {
 229                         _ignore_cinemas_changed = true;
 230                         ScopeGuard sg = [this]() { _ignore_cinemas_changed = false; };
 231                         Config::instance()->add_cinema(cinema);
 232                 } catch (FileError& e) {
 233                         error_dialog(GetParent(), _("Could not write cinema details to the cinemas.xml file.  Check that the location of cinemas.xml is valid in DCP-o-matic's preferences."), std_to_wx(e.what()));
 234                         return;
 235                 }
 236
 237                 wxTreeListItem previous = wxTLI_FIRST;
 238                 bool found = false;
 239                 for (auto existing_cinema: cinemas) {
 240                         if (_collator.compare(dialog->name(), existing_cinema->name) < 0) {
 241                                 /* existing_cinema should be after the one we're inserting */
 242                                 found = true;
 243                                 break;
 244                         }
 245                         auto item = cinema_to_item(existing_cinema);
 246                         DCPOMATIC_ASSERT(item);
 247                         previous = *item;
 248                 }
 249
 250                 auto item = add_cinema(cinema, found ? previous : wxTLI_LAST);
 251
 252                 if (item) {
 253                         _targets->UnselectAll ();
 254                         _targets->Select (*item);
 255                 }
 256         }
 257
 258         selection_changed ();
 259 }
 260
 261
 262 shared_ptr<Cinema>
 263 ScreensPanel::cinema_for_operation () const
 264 {
 265         if (_selected_cinemas.size() == 1) {
 266                 return _selected_cinemas[0];
 267         } else if (_selected_screens.size() == 1) {
 268                 return _selected_screens[0]->cinema;
 269         }
 270
 271         return {};
 272 }
 273
 274
 275 void
 276 ScreensPanel::edit_cinema_clicked ()
 277 {
 278         auto cinema = cinema_for_operation ();
 279         if (!cinema) {
 280                 return;
 281         }
 282
 283         auto dialog = new CinemaDialog(
 284                 GetParent(), _("Edit cinema"), cinema->name, cinema->emails, cinema->notes, cinema->utc_offset_hour(), cinema->utc_offset_minute()
 285                 );
 286         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 287
 288         if (dialog->ShowModal() == wxID_OK) {
 289                 cinema->name = dialog->name();
 290                 cinema->emails = dialog->emails();
 291                 cinema->notes = dialog->notes();
 292                 cinema->set_utc_offset_hour(dialog->utc_offset_hour());
 293                 cinema->set_utc_offset_minute(dialog->utc_offset_minute());
 294                 notify_cinemas_changed();
 295                 auto item = cinema_to_item(cinema);
 296                 DCPOMATIC_ASSERT(item);
 297                 _targets->SetItemText (*item, std_to_wx(dialog->name()));
 298         }
 299 }
 300
 301
 302 void
 303 ScreensPanel::remove_cinema_clicked ()
 304 {
 305         if (_selected_cinemas.size() == 1) {
 306                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove the cinema '%s'?"), std_to_wx(_selected_cinemas[0]->name)))) {
 307                         return;
 308                 }
 309         } else {
 310                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove %d cinemas?"), int(_selected_cinemas.size())))) {
 311                         return;
 312                 }
 313         }
 314
 315         for (auto const& cinema: _selected_cinemas) {
 316                 _ignore_cinemas_changed = true;
 317                 ScopeGuard sg = [this]() { _ignore_cinemas_changed = false; };
 318                 Config::instance()->remove_cinema(cinema);
 319                 auto item = cinema_to_item(cinema);
 320                 DCPOMATIC_ASSERT(item);
 321                 _targets->DeleteItem(*item);
 322         }
 323
 324         selection_changed ();
 325 }
 326
 327
 328 void
 329 ScreensPanel::add_screen_clicked ()
 330 {
 331         auto cinema = cinema_for_operation ();
 332         if (!cinema) {
 333                 return;
 334         }
 335
 336         auto dialog = new ScreenDialog(GetParent(), _("Add Screen"));
 337         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 338
 339         if (dialog->ShowModal () != wxID_OK) {
 340                 return;
 341         }
 342
 343         for (auto screen: cinema->screens()) {
 344                 if (screen->name == dialog->name()) {
 345                         error_dialog (
 346                                 GetParent(),
 347                                 wxString::Format (
 348                                         _("You cannot add a screen called '%s' as the cinema already has a screen with this name."),
 349                                         std_to_wx(dialog->name()).data()
 350                                         )
 351                                 );
 352                         return;
 353                 }
 354         }
 355
 356         auto screen = std::make_shared<Screen>(dialog->name(), dialog->notes(), dialog->recipient(), dialog->recipient_file(), dialog->trusted_devices());
 357         cinema->add_screen (screen);
 358         notify_cinemas_changed();
 359
 360         auto id = add_screen (cinema, screen);
 361         if (id) {
 362                 _targets->Expand (id.get ());
 363         }
 364 }
 365
 366
 367 void
 368 ScreensPanel::edit_screen_clicked ()
 369 {
 370         if (_selected_screens.size() != 1) {
 371                 return;
 372         }
 373
 374         auto edit_screen = _selected_screens[0];
 375
 376         auto dialog = new ScreenDialog(
 377                 GetParent(), _("Edit screen"),
 378                 edit_screen->name,
 379                 edit_screen->notes,
 380                 edit_screen->recipient,
 381                 edit_screen->recipient_file,
 382                 edit_screen->trusted_devices
 383                 );
 384         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 385
 386         if (dialog->ShowModal() != wxID_OK) {
 387                 return;
 388         }
 389
 390         auto cinema = edit_screen->cinema;
 391         for (auto screen: cinema->screens()) {
 392                 if (screen != edit_screen && screen->name == dialog->name()) {
 393                         error_dialog (
 394                                 GetParent(),
 395                                 wxString::Format (
 396                                         _("You cannot change this screen's name to '%s' as the cinema already has a screen with this name."),
 397                                         std_to_wx(dialog->name()).data()
 398                                         )
 399                                 );
 400                         return;
 401                 }
 402         }
 403
 404         edit_screen->name = dialog->name();
 405         edit_screen->notes = dialog->notes();
 406         edit_screen->recipient = dialog->recipient();
 407         edit_screen->recipient_file = dialog->recipient_file();
 408         edit_screen->trusted_devices = dialog->trusted_devices();
 409         notify_cinemas_changed();
 410
 411         auto item = screen_to_item(edit_screen);
 412         DCPOMATIC_ASSERT (item);
 413         _targets->SetItemText (*item, std_to_wx(dialog->name()));
 414 }
 415
 416
 417 void
 418 ScreensPanel::remove_screen_clicked ()
 419 {
 420         if (_selected_screens.size() == 1) {
 421                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove the screen '%s'?"), std_to_wx(_selected_screens[0]->name)))) {
 422                         return;
 423                 }
 424         } else {
 425                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove %d screens?"), int(_selected_screens.size())))) {
 426                         return;
 427                 }
 428         }
 429
 430         for (auto const& screen: _selected_screens) {
 431                 screen->cinema->remove_screen(screen);
 432                 auto item = screen_to_item(screen);
 433                 DCPOMATIC_ASSERT(item);
 434                 _targets->DeleteItem(*item);
 435         }
 436
 437         notify_cinemas_changed();
 438 }
 439
 440
 441 vector<shared_ptr<Screen>>
 442 ScreensPanel::screens () const
 443 {
 444         vector<shared_ptr<Screen>> output;
 445         std::copy (_checked_screens.begin(), _checked_screens.end(), std::back_inserter(output));
 446         return output;
 447 }
 448
 449
 450 void
 451 ScreensPanel::selection_changed_shim (wxTreeListEvent &)
 452 {
 453         selection_changed ();
 454 }
 455
 456
 457 void
 458 ScreensPanel::selection_changed ()
 459 {
 460         if (_ignore_selection_change) {
 461                 return;
 462         }
 463
 464         wxTreeListItems selection;
 465         _targets->GetSelections (selection);
 466
 467         _selected_cinemas.clear ();
 468         _selected_screens.clear ();
 469
 470         for (size_t i = 0; i < selection.size(); ++i) {
 471                 if (auto cinema = item_to_cinema(selection[i])) {
 472                         _selected_cinemas.push_back(cinema);
 473                 }
 474                 if (auto screen = item_to_screen(selection[i])) {
 475                         _selected_screens.push_back(screen);
 476                 }
 477         }
 478
 479         setup_sensitivity ();
 480 }
 481
 482
 483 void
 484 ScreensPanel::add_cinemas ()
 485 {
 486         auto cinemas = Config::instance()->cinemas();
 487         cinemas.sort(
 488                 [this](shared_ptr<Cinema> a, shared_ptr<Cinema> b) { return _collator.compare(a->name, b->name) < 0; }
 489                 );
 490
 491         for (auto cinema: cinemas) {
 492                 add_cinema (cinema, wxTLI_LAST);
 493         }
 494 }
 495
 496
 497 void
 498 ScreensPanel::clear_and_re_add()
 499 {
 500         _targets->DeleteAllItems ();
 501
 502         _item_to_cinema.clear ();
 503         _cinema_to_item.clear ();
 504         _item_to_screen.clear ();
 505         _screen_to_item.clear ();
 506
 507         add_cinemas ();
 508 }
 509
 510
 511 void
 512 ScreensPanel::search_changed ()
 513 {
 514         clear_and_re_add();
 515
 516         _ignore_selection_change = true;
 517
 518         for (auto const& selection: _selected_cinemas) {
 519                 if (auto item = cinema_to_item(selection)) {
 520                         _targets->Select (*item);
 521                 }
 522         }
 523
 524         for (auto const& selection: _selected_screens) {
 525                 if (auto item = screen_to_item(selection)) {
 526                         _targets->Select (*item);
 527                 }
 528         }
 529
 530         _ignore_selection_change = false;
 531
 532         _ignore_check_change = true;
 533
 534         for (auto const& checked: _checked_screens) {
 535                 if (auto item = screen_to_item(checked)) {
 536                         _targets->CheckItem(*item, wxCHK_CHECKED);
 537                         setup_cinema_checked_state(*item);
 538                 }
 539         }
 540
 541         _ignore_check_change = false;
 542 }
 543
 544
 545 void
 546 ScreensPanel::set_screen_checked (wxTreeListItem item, bool checked)
 547 {
 548         auto screen = item_to_screen(item);
 549         DCPOMATIC_ASSERT(screen);
 550         if (checked) {
 551                 _checked_screens.insert(screen);
 552         } else {
 553                 _checked_screens.erase(screen);
 554         }
 555 }
 556
 557
 558 void
 559 ScreensPanel::setup_cinema_checked_state (wxTreeListItem screen)
 560 {
 561         auto cinema = _targets->GetItemParent(screen);
 562         DCPOMATIC_ASSERT (cinema.IsOk());
 563         int checked = 0;
 564         int unchecked = 0;
 565         for (auto child = _targets->GetFirstChild(cinema); child.IsOk(); child = _targets->GetNextSibling(child)) {
 566                 if (_targets->GetCheckedState(child) == wxCHK_CHECKED) {
 567                     ++checked;
 568                 } else {
 569                     ++unchecked;
 570                 }
 571         }
 572         if (checked == 0) {
 573                 _targets->CheckItem(cinema, wxCHK_UNCHECKED);
 574         } else if (unchecked == 0) {
 575                 _targets->CheckItem(cinema, wxCHK_CHECKED);
 576         } else {
 577                 _targets->CheckItem(cinema, wxCHK_UNDETERMINED);
 578         }
 579 }
 580
 581
 582 void
 583 ScreensPanel::checkbox_changed (wxTreeListEvent& ev)
 584 {
 585         if (_ignore_check_change) {
 586                 return;
 587         }
 588
 589         if (item_to_cinema(ev.GetItem())) {
 590                 /* Cinema: check/uncheck all children */
 591                 auto const checked = _targets->GetCheckedState(ev.GetItem());
 592                 for (auto child = _targets->GetFirstChild(ev.GetItem()); child.IsOk(); child = _targets->GetNextSibling(child)) {
 593                         _targets->CheckItem(child, checked);
 594                         set_screen_checked(child, checked);
 595                 }
 596         } else {
 597                 set_screen_checked(ev.GetItem(), _targets->GetCheckedState(ev.GetItem()));
 598                 setup_cinema_checked_state(ev.GetItem());
 599         }
 600
 601         ScreensChanged ();
 602 }
 603
 604
 605 shared_ptr<Cinema>
 606 ScreensPanel::item_to_cinema (wxTreeListItem item) const
 607 {
 608         auto iter = _item_to_cinema.find (item);
 609         if (iter == _item_to_cinema.end()) {
 610                 return {};
 611         }
 612
 613         return iter->second;
 614 }
 615
 616
 617 shared_ptr<Screen>
 618 ScreensPanel::item_to_screen (wxTreeListItem item) const
 619 {
 620         auto iter = _item_to_screen.find (item);
 621         if (iter == _item_to_screen.end()) {
 622                 return {};
 623         }
 624
 625         return iter->second;
 626 }
 627
 628
 629 optional<wxTreeListItem>
 630 ScreensPanel::cinema_to_item (shared_ptr<Cinema> cinema) const
 631 {
 632         auto iter = _cinema_to_item.find (cinema);
 633         if (iter == _cinema_to_item.end()) {
 634                 return {};
 635         }
 636
 637         return iter->second;
 638 }
 639
 640
 641 optional<wxTreeListItem>
 642 ScreensPanel::screen_to_item (shared_ptr<Screen> screen) const
 643 {
 644         auto iter = _screen_to_item.find (screen);
 645         if (iter == _screen_to_item.end()) {
 646                 return {};
 647         }
 648
 649         return iter->second;
 650 }
 651
 652
 653 bool
 654 ScreensPanel::notify_cinemas_changed()
 655 {
 656         _ignore_cinemas_changed = true;
 657         ScopeGuard sg = [this]() { _ignore_cinemas_changed = false; };
 658
 659         try {
 660                 Config::instance()->changed(Config::CINEMAS);
 661         } catch (FileError& e) {
 662                 error_dialog(GetParent(), _("Could not write cinema details to the cinemas.xml file.  Check that the location of cinemas.xml is valid in DCP-o-matic's preferences."), std_to_wx(e.what()));
 663                 return false;
 664         }
 665
 666         return true;
 667 }
 668
 669
 670 void
 671 ScreensPanel::config_changed(Config::Property property)
 672 {
 673         if (property == Config::Property::CINEMAS && !_ignore_cinemas_changed) {
 674                 clear_and_re_add();
 675         }
 676 }