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::list;
  36 using std::make_pair;
  37 using std::make_shared;
  38 using std::map;
  39 using std::pair;
  40 using std::shared_ptr;
  41 using std::string;
  42 using std::vector;
  43 using boost::optional;
  44 #if BOOST_VERSION >= 106100
  45 using namespace boost::placeholders;
  46 #endif
  47 using namespace dcpomatic;
  48
  49
  50 ScreensPanel::ScreensPanel (wxWindow* parent)
  51         : wxPanel (parent, wxID_ANY)
  52 {
  53         auto sizer = new wxBoxSizer (wxVERTICAL);
  54
  55         _search = new wxSearchCtrl (this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxSize(200, search_ctrl_height()));
  56 #ifndef __WXGTK3__
  57         /* The cancel button seems to be strangely broken in GTK3; clicking on it twice sometimes works */
  58         _search->ShowCancelButton (true);
  59 #endif
  60         sizer->Add (_search, 0, wxBOTTOM, DCPOMATIC_SIZER_GAP);
  61
  62         auto targets = new wxBoxSizer (wxHORIZONTAL);
  63         _targets = new wxTreeListCtrl (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTL_MULTIPLE | wxTL_3STATE | wxTL_NO_HEADER);
  64         _targets->AppendColumn (wxT("foo"));
  65
  66         targets->Add (_targets, 1, wxEXPAND | wxRIGHT, DCPOMATIC_SIZER_GAP);
  67
  68         add_cinemas ();
  69
  70         auto side_buttons = new wxBoxSizer (wxVERTICAL);
  71
  72         auto target_buttons = new wxBoxSizer (wxVERTICAL);
  73
  74         _add_cinema = new Button (this, _("Add Cinema..."));
  75         target_buttons->Add (_add_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  76         _edit_cinema = new Button (this, _("Edit Cinema..."));
  77         target_buttons->Add (_edit_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  78         _remove_cinema = new Button (this, _("Remove Cinema"));
  79         target_buttons->Add (_remove_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  80         _add_screen = new Button (this, _("Add Screen..."));
  81         target_buttons->Add (_add_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  82         _edit_screen = new Button (this, _("Edit Screen..."));
  83         target_buttons->Add (_edit_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  84         _remove_screen = new Button (this, _("Remove Screen"));
  85         target_buttons->Add (_remove_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  86
  87         side_buttons->Add (target_buttons, 0, 0);
  88
  89         auto check_buttons = new wxBoxSizer (wxVERTICAL);
  90
  91         _check_all = new Button (this, _("Check all"));
  92         check_buttons->Add (_check_all, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  93         _uncheck_all = new Button (this, _("Uncheck all"));
  94         check_buttons->Add (_uncheck_all, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  95
  96         side_buttons->Add (check_buttons, 1, wxEXPAND | wxTOP, DCPOMATIC_BUTTON_STACK_GAP * 8);
  97
  98         targets->Add (side_buttons, 0, 0);
  99
 100         sizer->Add (targets, 1, wxEXPAND);
 101
 102         _search->Bind        (wxEVT_TEXT, boost::bind (&ScreensPanel::search_changed, this));
 103         _targets->Bind       (wxEVT_TREELIST_SELECTION_CHANGED, &ScreensPanel::selection_changed_shim, this);
 104         _targets->Bind       (wxEVT_TREELIST_ITEM_CHECKED, &ScreensPanel::checkbox_changed, this);
 105
 106         _add_cinema->Bind    (wxEVT_BUTTON, boost::bind (&ScreensPanel::add_cinema_clicked, this));
 107         _edit_cinema->Bind   (wxEVT_BUTTON, boost::bind (&ScreensPanel::edit_cinema_clicked, this));
 108         _remove_cinema->Bind (wxEVT_BUTTON, boost::bind (&ScreensPanel::remove_cinema_clicked, this));
 109
 110         _add_screen->Bind    (wxEVT_BUTTON, boost::bind (&ScreensPanel::add_screen_clicked, this));
 111         _edit_screen->Bind   (wxEVT_BUTTON, boost::bind (&ScreensPanel::edit_screen_clicked, this));
 112         _remove_screen->Bind (wxEVT_BUTTON, boost::bind (&ScreensPanel::remove_screen_clicked, this));
 113
 114         _check_all->Bind     (wxEVT_BUTTON, boost::bind(&ScreensPanel::check_all, this));
 115         _uncheck_all->Bind   (wxEVT_BUTTON, boost::bind(&ScreensPanel::uncheck_all, this));
 116
 117         SetSizer (sizer);
 118
 119         _config_connection = Config::instance()->Changed.connect(boost::bind(&ScreensPanel::config_changed, this, _1));
 120 }
 121
 122
 123 ScreensPanel::~ScreensPanel ()
 124 {
 125         _targets->Unbind (wxEVT_TREELIST_SELECTION_CHANGED, &ScreensPanel::selection_changed_shim, this);
 126         _targets->Unbind (wxEVT_TREELIST_ITEM_CHECKED, &ScreensPanel::checkbox_changed, this);
 127 }
 128
 129
 130 void
 131 ScreensPanel::check_all ()
 132 {
 133         for (auto cinema = _targets->GetFirstChild(_targets->GetRootItem()); cinema.IsOk();  cinema = _targets->GetNextSibling(cinema)) {
 134                 _targets->CheckItem(cinema, wxCHK_CHECKED);
 135                 for (auto screen = _targets->GetFirstChild(cinema); screen.IsOk(); screen = _targets->GetNextSibling(screen)) {
 136                         _targets->CheckItem(screen, wxCHK_CHECKED);
 137                         set_screen_checked(screen, true);
 138                 }
 139         }
 140 }
 141
 142
 143 void
 144 ScreensPanel::uncheck_all ()
 145 {
 146         for (auto cinema = _targets->GetFirstChild(_targets->GetRootItem()); cinema.IsOk();  cinema = _targets->GetNextSibling(cinema)) {
 147                 _targets->CheckItem(cinema, wxCHK_UNCHECKED);
 148                 for (auto screen = _targets->GetFirstChild(cinema); screen.IsOk(); screen = _targets->GetNextSibling(screen)) {
 149                         _targets->CheckItem(screen, wxCHK_UNCHECKED);
 150                         set_screen_checked(screen, false);
 151                 }
 152         }
 153 }
 154
 155
 156 void
 157 ScreensPanel::setup_sensitivity ()
 158 {
 159         bool const sc = _selected_cinemas.size() == 1;
 160         bool const ss = _selected_screens.size() == 1;
 161
 162         _edit_cinema->Enable (sc || ss);
 163         _remove_cinema->Enable (_selected_cinemas.size() >= 1);
 164
 165         _add_screen->Enable (sc || ss);
 166         _edit_screen->Enable (ss);
 167         _remove_screen->Enable (_selected_screens.size() >= 1);
 168 }
 169
 170
 171 void
 172 ScreensPanel::convert_to_lower(string& s)
 173 {
 174         transform(s.begin(), s.end(), s.begin(), ::tolower);
 175 }
 176
 177
 178 bool
 179 ScreensPanel::matches_search(shared_ptr<const Cinema> cinema, string lower_case_search)
 180 {
 181         if (lower_case_search.empty()) {
 182                 return true;
 183         }
 184
 185         auto name = cinema->name;
 186         convert_to_lower(name);
 187         return name.find(lower_case_search) != string::npos;
 188 }
 189
 190
 191 optional<wxTreeListItem>
 192 ScreensPanel::add_cinema (shared_ptr<Cinema> cinema, wxTreeListItem previous)
 193 {
 194         auto search = wx_to_std (_search->GetValue ());
 195         convert_to_lower(search);
 196         if (!matches_search(cinema, search)) {
 197                 return {};
 198         }
 199
 200         auto id = _targets->InsertItem(_targets->GetRootItem(), previous, std_to_wx(cinema->name));
 201
 202         _item_to_cinema[id] = cinema;
 203         _cinema_to_item[cinema] = id;
 204
 205         for (auto screen: cinema->screens()) {
 206                 add_screen (cinema, screen);
 207         }
 208
 209         return id;
 210 }
 211
 212
 213 optional<wxTreeListItem>
 214 ScreensPanel::add_screen (shared_ptr<Cinema> cinema, shared_ptr<Screen> screen)
 215 {
 216         auto item = cinema_to_item(cinema);
 217         if (!item) {
 218                 return {};
 219         }
 220
 221         auto id = _targets->AppendItem(*item, std_to_wx(screen->name));
 222
 223         _item_to_screen[id] = screen;
 224         _screen_to_item[screen] = id;
 225
 226         return item;
 227 }
 228
 229
 230 void
 231 ScreensPanel::add_cinema_clicked ()
 232 {
 233         auto dialog = new CinemaDialog (GetParent(), _("Add Cinema"));
 234         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 235
 236         if (dialog->ShowModal() == wxID_OK) {
 237                 auto cinema = make_shared<Cinema>(dialog->name(), dialog->emails(), dialog->notes(), dialog->utc_offset_hour(), dialog->utc_offset_minute());
 238
 239                 auto cinemas = sorted_cinemas();
 240
 241                 try {
 242                         _ignore_cinemas_changed = true;
 243                         ScopeGuard sg = [this]() { _ignore_cinemas_changed = false; };
 244                         Config::instance()->add_cinema(cinema);
 245                 } catch (FileError& e) {
 246                         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()));
 247                         return;
 248                 }
 249
 250                 wxTreeListItem previous = wxTLI_FIRST;
 251                 bool found = false;
 252                 auto search = wx_to_std(_search->GetValue());
 253                 convert_to_lower(search);
 254                 for (auto existing_cinema: cinemas) {
 255                         if (!matches_search(existing_cinema, search)) {
 256                                 continue;
 257                         }
 258                         if (_collator.compare(dialog->name(), existing_cinema->name) < 0) {
 259                                 /* existing_cinema should be after the one we're inserting */
 260                                 found = true;
 261                                 break;
 262                         }
 263                         auto item = cinema_to_item(existing_cinema);
 264                         DCPOMATIC_ASSERT(item);
 265                         previous = *item;
 266                 }
 267
 268                 auto item = add_cinema(cinema, found ? previous : wxTLI_LAST);
 269
 270                 if (item) {
 271                         _targets->UnselectAll ();
 272                         _targets->Select (*item);
 273                 }
 274         }
 275
 276         selection_changed ();
 277 }
 278
 279
 280 shared_ptr<Cinema>
 281 ScreensPanel::cinema_for_operation () const
 282 {
 283         if (_selected_cinemas.size() == 1) {
 284                 return _selected_cinemas[0];
 285         } else if (_selected_screens.size() == 1) {
 286                 return _selected_screens[0]->cinema;
 287         }
 288
 289         return {};
 290 }
 291
 292
 293 void
 294 ScreensPanel::edit_cinema_clicked ()
 295 {
 296         auto cinema = cinema_for_operation ();
 297         if (!cinema) {
 298                 return;
 299         }
 300
 301         auto dialog = new CinemaDialog(
 302                 GetParent(), _("Edit cinema"), cinema->name, cinema->emails, cinema->notes, cinema->utc_offset_hour(), cinema->utc_offset_minute()
 303                 );
 304         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 305
 306         if (dialog->ShowModal() == wxID_OK) {
 307                 cinema->name = dialog->name();
 308                 cinema->emails = dialog->emails();
 309                 cinema->notes = dialog->notes();
 310                 cinema->set_utc_offset_hour(dialog->utc_offset_hour());
 311                 cinema->set_utc_offset_minute(dialog->utc_offset_minute());
 312                 notify_cinemas_changed();
 313                 auto item = cinema_to_item(cinema);
 314                 DCPOMATIC_ASSERT(item);
 315                 _targets->SetItemText (*item, std_to_wx(dialog->name()));
 316         }
 317 }
 318
 319
 320 void
 321 ScreensPanel::remove_cinema_clicked ()
 322 {
 323         if (_selected_cinemas.size() == 1) {
 324                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove the cinema '%s'?"), std_to_wx(_selected_cinemas[0]->name)))) {
 325                         return;
 326                 }
 327         } else {
 328                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove %d cinemas?"), int(_selected_cinemas.size())))) {
 329                         return;
 330                 }
 331         }
 332
 333         for (auto const& cinema: _selected_cinemas) {
 334                 _ignore_cinemas_changed = true;
 335                 ScopeGuard sg = [this]() { _ignore_cinemas_changed = false; };
 336                 Config::instance()->remove_cinema(cinema);
 337                 auto item = cinema_to_item(cinema);
 338                 DCPOMATIC_ASSERT(item);
 339                 _targets->DeleteItem(*item);
 340         }
 341
 342         selection_changed ();
 343 }
 344
 345
 346 void
 347 ScreensPanel::add_screen_clicked ()
 348 {
 349         auto cinema = cinema_for_operation ();
 350         if (!cinema) {
 351                 return;
 352         }
 353
 354         auto dialog = new ScreenDialog(GetParent(), _("Add Screen"));
 355         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 356
 357         if (dialog->ShowModal () != wxID_OK) {
 358                 return;
 359         }
 360
 361         for (auto screen: cinema->screens()) {
 362                 if (screen->name == dialog->name()) {
 363                         error_dialog (
 364                                 GetParent(),
 365                                 wxString::Format (
 366                                         _("You cannot add a screen called '%s' as the cinema already has a screen with this name."),
 367                                         std_to_wx(dialog->name()).data()
 368                                         )
 369                                 );
 370                         return;
 371                 }
 372         }
 373
 374         auto screen = std::make_shared<Screen>(dialog->name(), dialog->notes(), dialog->recipient(), dialog->recipient_file(), dialog->trusted_devices());
 375         cinema->add_screen (screen);
 376         notify_cinemas_changed();
 377
 378         auto id = add_screen (cinema, screen);
 379         if (id) {
 380                 _targets->Expand (id.get ());
 381         }
 382 }
 383
 384
 385 void
 386 ScreensPanel::edit_screen_clicked ()
 387 {
 388         if (_selected_screens.size() != 1) {
 389                 return;
 390         }
 391
 392         auto edit_screen = _selected_screens[0];
 393
 394         auto dialog = new ScreenDialog(
 395                 GetParent(), _("Edit screen"),
 396                 edit_screen->name,
 397                 edit_screen->notes,
 398                 edit_screen->recipient,
 399                 edit_screen->recipient_file,
 400                 edit_screen->trusted_devices
 401                 );
 402         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 403
 404         if (dialog->ShowModal() != wxID_OK) {
 405                 return;
 406         }
 407
 408         auto cinema = edit_screen->cinema;
 409         for (auto screen: cinema->screens()) {
 410                 if (screen != edit_screen && screen->name == dialog->name()) {
 411                         error_dialog (
 412                                 GetParent(),
 413                                 wxString::Format (
 414                                         _("You cannot change this screen's name to '%s' as the cinema already has a screen with this name."),
 415                                         std_to_wx(dialog->name()).data()
 416                                         )
 417                                 );
 418                         return;
 419                 }
 420         }
 421
 422         edit_screen->name = dialog->name();
 423         edit_screen->notes = dialog->notes();
 424         edit_screen->recipient = dialog->recipient();
 425         edit_screen->recipient_file = dialog->recipient_file();
 426         edit_screen->trusted_devices = dialog->trusted_devices();
 427         notify_cinemas_changed();
 428
 429         auto item = screen_to_item(edit_screen);
 430         DCPOMATIC_ASSERT (item);
 431         _targets->SetItemText (*item, std_to_wx(dialog->name()));
 432 }
 433
 434
 435 void
 436 ScreensPanel::remove_screen_clicked ()
 437 {
 438         if (_selected_screens.size() == 1) {
 439                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove the screen '%s'?"), std_to_wx(_selected_screens[0]->name)))) {
 440                         return;
 441                 }
 442         } else {
 443                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove %d screens?"), int(_selected_screens.size())))) {
 444                         return;
 445                 }
 446         }
 447
 448         for (auto const& screen: _selected_screens) {
 449                 screen->cinema->remove_screen(screen);
 450                 auto item = screen_to_item(screen);
 451                 DCPOMATIC_ASSERT(item);
 452                 _targets->DeleteItem(*item);
 453         }
 454
 455         notify_cinemas_changed();
 456 }
 457
 458
 459 vector<shared_ptr<Screen>>
 460 ScreensPanel::screens () const
 461 {
 462         vector<shared_ptr<Screen>> output;
 463         std::copy (_checked_screens.begin(), _checked_screens.end(), std::back_inserter(output));
 464         return output;
 465 }
 466
 467
 468 void
 469 ScreensPanel::selection_changed_shim (wxTreeListEvent &)
 470 {
 471         selection_changed ();
 472 }
 473
 474
 475 void
 476 ScreensPanel::selection_changed ()
 477 {
 478         if (_ignore_selection_change) {
 479                 return;
 480         }
 481
 482         wxTreeListItems selection;
 483         _targets->GetSelections (selection);
 484
 485         _selected_cinemas.clear ();
 486         _selected_screens.clear ();
 487
 488         for (size_t i = 0; i < selection.size(); ++i) {
 489                 if (auto cinema = item_to_cinema(selection[i])) {
 490                         _selected_cinemas.push_back(cinema);
 491                 }
 492                 if (auto screen = item_to_screen(selection[i])) {
 493                         _selected_screens.push_back(screen);
 494                 }
 495         }
 496
 497         setup_sensitivity ();
 498 }
 499
 500
 501 list<shared_ptr<Cinema>>
 502 ScreensPanel::sorted_cinemas() const
 503 {
 504         auto cinemas = Config::instance()->cinemas();
 505
 506         cinemas.sort(
 507                 [this](shared_ptr<Cinema> a, shared_ptr<Cinema> b) { return _collator.compare(a->name, b->name) < 0; }
 508                 );
 509
 510         return cinemas;
 511 }
 512
 513
 514 void
 515 ScreensPanel::add_cinemas ()
 516 {
 517         for (auto cinema: sorted_cinemas()) {
 518                 add_cinema (cinema, wxTLI_LAST);
 519         }
 520 }
 521
 522
 523 void
 524 ScreensPanel::clear_and_re_add()
 525 {
 526         _targets->DeleteAllItems ();
 527
 528         _item_to_cinema.clear ();
 529         _cinema_to_item.clear ();
 530         _item_to_screen.clear ();
 531         _screen_to_item.clear ();
 532
 533         add_cinemas ();
 534 }
 535
 536
 537 void
 538 ScreensPanel::search_changed ()
 539 {
 540         clear_and_re_add();
 541
 542         _ignore_selection_change = true;
 543
 544         for (auto const& selection: _selected_cinemas) {
 545                 if (auto item = cinema_to_item(selection)) {
 546                         _targets->Select (*item);
 547                 }
 548         }
 549
 550         for (auto const& selection: _selected_screens) {
 551                 if (auto item = screen_to_item(selection)) {
 552                         _targets->Select (*item);
 553                 }
 554         }
 555
 556         _ignore_selection_change = false;
 557
 558         _ignore_check_change = true;
 559
 560         for (auto const& checked: _checked_screens) {
 561                 if (auto item = screen_to_item(checked)) {
 562                         _targets->CheckItem(*item, wxCHK_CHECKED);
 563                         setup_cinema_checked_state(*item);
 564                 }
 565         }
 566
 567         _ignore_check_change = false;
 568 }
 569
 570
 571 void
 572 ScreensPanel::set_screen_checked (wxTreeListItem item, bool checked)
 573 {
 574         auto screen = item_to_screen(item);
 575         DCPOMATIC_ASSERT(screen);
 576         if (checked) {
 577                 _checked_screens.insert(screen);
 578         } else {
 579                 _checked_screens.erase(screen);
 580         }
 581 }
 582
 583
 584 void
 585 ScreensPanel::setup_cinema_checked_state (wxTreeListItem screen)
 586 {
 587         auto cinema = _targets->GetItemParent(screen);
 588         DCPOMATIC_ASSERT (cinema.IsOk());
 589         int checked = 0;
 590         int unchecked = 0;
 591         for (auto child = _targets->GetFirstChild(cinema); child.IsOk(); child = _targets->GetNextSibling(child)) {
 592                 if (_targets->GetCheckedState(child) == wxCHK_CHECKED) {
 593                     ++checked;
 594                 } else {
 595                     ++unchecked;
 596                 }
 597         }
 598         if (checked == 0) {
 599                 _targets->CheckItem(cinema, wxCHK_UNCHECKED);
 600         } else if (unchecked == 0) {
 601                 _targets->CheckItem(cinema, wxCHK_CHECKED);
 602         } else {
 603                 _targets->CheckItem(cinema, wxCHK_UNDETERMINED);
 604         }
 605 }
 606
 607
 608 void
 609 ScreensPanel::checkbox_changed (wxTreeListEvent& ev)
 610 {
 611         if (_ignore_check_change) {
 612                 return;
 613         }
 614
 615         if (item_to_cinema(ev.GetItem())) {
 616                 /* Cinema: check/uncheck all children */
 617                 auto const checked = _targets->GetCheckedState(ev.GetItem());
 618                 for (auto child = _targets->GetFirstChild(ev.GetItem()); child.IsOk(); child = _targets->GetNextSibling(child)) {
 619                         _targets->CheckItem(child, checked);
 620                         set_screen_checked(child, checked);
 621                 }
 622         } else {
 623                 set_screen_checked(ev.GetItem(), _targets->GetCheckedState(ev.GetItem()));
 624                 setup_cinema_checked_state(ev.GetItem());
 625         }
 626
 627         ScreensChanged ();
 628 }
 629
 630
 631 shared_ptr<Cinema>
 632 ScreensPanel::item_to_cinema (wxTreeListItem item) const
 633 {
 634         auto iter = _item_to_cinema.find (item);
 635         if (iter == _item_to_cinema.end()) {
 636                 return {};
 637         }
 638
 639         return iter->second;
 640 }
 641
 642
 643 shared_ptr<Screen>
 644 ScreensPanel::item_to_screen (wxTreeListItem item) const
 645 {
 646         auto iter = _item_to_screen.find (item);
 647         if (iter == _item_to_screen.end()) {
 648                 return {};
 649         }
 650
 651         return iter->second;
 652 }
 653
 654
 655 optional<wxTreeListItem>
 656 ScreensPanel::cinema_to_item (shared_ptr<Cinema> cinema) const
 657 {
 658         auto iter = _cinema_to_item.find (cinema);
 659         if (iter == _cinema_to_item.end()) {
 660                 return {};
 661         }
 662
 663         return iter->second;
 664 }
 665
 666
 667 optional<wxTreeListItem>
 668 ScreensPanel::screen_to_item (shared_ptr<Screen> screen) const
 669 {
 670         auto iter = _screen_to_item.find (screen);
 671         if (iter == _screen_to_item.end()) {
 672                 return {};
 673         }
 674
 675         return iter->second;
 676 }
 677
 678
 679 bool
 680 ScreensPanel::notify_cinemas_changed()
 681 {
 682         _ignore_cinemas_changed = true;
 683         ScopeGuard sg = [this]() { _ignore_cinemas_changed = false; };
 684
 685         try {
 686                 Config::instance()->changed(Config::CINEMAS);
 687         } catch (FileError& e) {
 688                 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()));
 689                 return false;
 690         }
 691
 692         return true;
 693 }
 694
 695
 696 void
 697 ScreensPanel::config_changed(Config::Property property)
 698 {
 699         if (property == Config::Property::CINEMAS && !_ignore_cinemas_changed) {
 700                 clear_and_re_add();
 701         }
 702 }