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                 for (auto existing_cinema: cinemas) {
 253                         if (_collator.compare(dialog->name(), existing_cinema->name) < 0) {
 254                                 /* existing_cinema should be after the one we're inserting */
 255                                 found = true;
 256                                 break;
 257                         }
 258                         auto item = cinema_to_item(existing_cinema);
 259                         DCPOMATIC_ASSERT(item);
 260                         previous = *item;
 261                 }
 262
 263                 auto item = add_cinema(cinema, found ? previous : wxTLI_LAST);
 264
 265                 if (item) {
 266                         _targets->UnselectAll ();
 267                         _targets->Select (*item);
 268                 }
 269         }
 270
 271         selection_changed ();
 272 }
 273
 274
 275 shared_ptr<Cinema>
 276 ScreensPanel::cinema_for_operation () const
 277 {
 278         if (_selected_cinemas.size() == 1) {
 279                 return _selected_cinemas[0];
 280         } else if (_selected_screens.size() == 1) {
 281                 return _selected_screens[0]->cinema;
 282         }
 283
 284         return {};
 285 }
 286
 287
 288 void
 289 ScreensPanel::edit_cinema_clicked ()
 290 {
 291         auto cinema = cinema_for_operation ();
 292         if (!cinema) {
 293                 return;
 294         }
 295
 296         auto dialog = new CinemaDialog(
 297                 GetParent(), _("Edit cinema"), cinema->name, cinema->emails, cinema->notes, cinema->utc_offset_hour(), cinema->utc_offset_minute()
 298                 );
 299         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 300
 301         if (dialog->ShowModal() == wxID_OK) {
 302                 cinema->name = dialog->name();
 303                 cinema->emails = dialog->emails();
 304                 cinema->notes = dialog->notes();
 305                 cinema->set_utc_offset_hour(dialog->utc_offset_hour());
 306                 cinema->set_utc_offset_minute(dialog->utc_offset_minute());
 307                 notify_cinemas_changed();
 308                 auto item = cinema_to_item(cinema);
 309                 DCPOMATIC_ASSERT(item);
 310                 _targets->SetItemText (*item, std_to_wx(dialog->name()));
 311         }
 312 }
 313
 314
 315 void
 316 ScreensPanel::remove_cinema_clicked ()
 317 {
 318         if (_selected_cinemas.size() == 1) {
 319                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove the cinema '%s'?"), std_to_wx(_selected_cinemas[0]->name)))) {
 320                         return;
 321                 }
 322         } else {
 323                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove %d cinemas?"), int(_selected_cinemas.size())))) {
 324                         return;
 325                 }
 326         }
 327
 328         for (auto const& cinema: _selected_cinemas) {
 329                 _ignore_cinemas_changed = true;
 330                 ScopeGuard sg = [this]() { _ignore_cinemas_changed = false; };
 331                 Config::instance()->remove_cinema(cinema);
 332                 auto item = cinema_to_item(cinema);
 333                 DCPOMATIC_ASSERT(item);
 334                 _targets->DeleteItem(*item);
 335         }
 336
 337         selection_changed ();
 338 }
 339
 340
 341 void
 342 ScreensPanel::add_screen_clicked ()
 343 {
 344         auto cinema = cinema_for_operation ();
 345         if (!cinema) {
 346                 return;
 347         }
 348
 349         auto dialog = new ScreenDialog(GetParent(), _("Add Screen"));
 350         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 351
 352         if (dialog->ShowModal () != wxID_OK) {
 353                 return;
 354         }
 355
 356         for (auto screen: cinema->screens()) {
 357                 if (screen->name == dialog->name()) {
 358                         error_dialog (
 359                                 GetParent(),
 360                                 wxString::Format (
 361                                         _("You cannot add a screen called '%s' as the cinema already has a screen with this name."),
 362                                         std_to_wx(dialog->name()).data()
 363                                         )
 364                                 );
 365                         return;
 366                 }
 367         }
 368
 369         auto screen = std::make_shared<Screen>(dialog->name(), dialog->notes(), dialog->recipient(), dialog->recipient_file(), dialog->trusted_devices());
 370         cinema->add_screen (screen);
 371         notify_cinemas_changed();
 372
 373         auto id = add_screen (cinema, screen);
 374         if (id) {
 375                 _targets->Expand (id.get ());
 376         }
 377 }
 378
 379
 380 void
 381 ScreensPanel::edit_screen_clicked ()
 382 {
 383         if (_selected_screens.size() != 1) {
 384                 return;
 385         }
 386
 387         auto edit_screen = _selected_screens[0];
 388
 389         auto dialog = new ScreenDialog(
 390                 GetParent(), _("Edit screen"),
 391                 edit_screen->name,
 392                 edit_screen->notes,
 393                 edit_screen->recipient,
 394                 edit_screen->recipient_file,
 395                 edit_screen->trusted_devices
 396                 );
 397         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 398
 399         if (dialog->ShowModal() != wxID_OK) {
 400                 return;
 401         }
 402
 403         auto cinema = edit_screen->cinema;
 404         for (auto screen: cinema->screens()) {
 405                 if (screen != edit_screen && screen->name == dialog->name()) {
 406                         error_dialog (
 407                                 GetParent(),
 408                                 wxString::Format (
 409                                         _("You cannot change this screen's name to '%s' as the cinema already has a screen with this name."),
 410                                         std_to_wx(dialog->name()).data()
 411                                         )
 412                                 );
 413                         return;
 414                 }
 415         }
 416
 417         edit_screen->name = dialog->name();
 418         edit_screen->notes = dialog->notes();
 419         edit_screen->recipient = dialog->recipient();
 420         edit_screen->recipient_file = dialog->recipient_file();
 421         edit_screen->trusted_devices = dialog->trusted_devices();
 422         notify_cinemas_changed();
 423
 424         auto item = screen_to_item(edit_screen);
 425         DCPOMATIC_ASSERT (item);
 426         _targets->SetItemText (*item, std_to_wx(dialog->name()));
 427 }
 428
 429
 430 void
 431 ScreensPanel::remove_screen_clicked ()
 432 {
 433         if (_selected_screens.size() == 1) {
 434                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove the screen '%s'?"), std_to_wx(_selected_screens[0]->name)))) {
 435                         return;
 436                 }
 437         } else {
 438                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove %d screens?"), int(_selected_screens.size())))) {
 439                         return;
 440                 }
 441         }
 442
 443         for (auto const& screen: _selected_screens) {
 444                 screen->cinema->remove_screen(screen);
 445                 auto item = screen_to_item(screen);
 446                 DCPOMATIC_ASSERT(item);
 447                 _targets->DeleteItem(*item);
 448         }
 449
 450         notify_cinemas_changed();
 451 }
 452
 453
 454 vector<shared_ptr<Screen>>
 455 ScreensPanel::screens () const
 456 {
 457         vector<shared_ptr<Screen>> output;
 458         std::copy (_checked_screens.begin(), _checked_screens.end(), std::back_inserter(output));
 459         return output;
 460 }
 461
 462
 463 void
 464 ScreensPanel::selection_changed_shim (wxTreeListEvent &)
 465 {
 466         selection_changed ();
 467 }
 468
 469
 470 void
 471 ScreensPanel::selection_changed ()
 472 {
 473         if (_ignore_selection_change) {
 474                 return;
 475         }
 476
 477         wxTreeListItems selection;
 478         _targets->GetSelections (selection);
 479
 480         _selected_cinemas.clear ();
 481         _selected_screens.clear ();
 482
 483         for (size_t i = 0; i < selection.size(); ++i) {
 484                 if (auto cinema = item_to_cinema(selection[i])) {
 485                         _selected_cinemas.push_back(cinema);
 486                 }
 487                 if (auto screen = item_to_screen(selection[i])) {
 488                         _selected_screens.push_back(screen);
 489                 }
 490         }
 491
 492         setup_sensitivity ();
 493 }
 494
 495
 496 list<shared_ptr<Cinema>>
 497 ScreensPanel::sorted_cinemas() const
 498 {
 499         auto cinemas = Config::instance()->cinemas();
 500
 501         cinemas.sort(
 502                 [this](shared_ptr<Cinema> a, shared_ptr<Cinema> b) { return _collator.compare(a->name, b->name) < 0; }
 503                 );
 504
 505         return cinemas;
 506 }
 507
 508
 509 void
 510 ScreensPanel::add_cinemas ()
 511 {
 512         for (auto cinema: sorted_cinemas()) {
 513                 add_cinema (cinema, wxTLI_LAST);
 514         }
 515 }
 516
 517
 518 void
 519 ScreensPanel::clear_and_re_add()
 520 {
 521         _targets->DeleteAllItems ();
 522
 523         _item_to_cinema.clear ();
 524         _cinema_to_item.clear ();
 525         _item_to_screen.clear ();
 526         _screen_to_item.clear ();
 527
 528         add_cinemas ();
 529 }
 530
 531
 532 void
 533 ScreensPanel::search_changed ()
 534 {
 535         clear_and_re_add();
 536
 537         _ignore_selection_change = true;
 538
 539         for (auto const& selection: _selected_cinemas) {
 540                 if (auto item = cinema_to_item(selection)) {
 541                         _targets->Select (*item);
 542                 }
 543         }
 544
 545         for (auto const& selection: _selected_screens) {
 546                 if (auto item = screen_to_item(selection)) {
 547                         _targets->Select (*item);
 548                 }
 549         }
 550
 551         _ignore_selection_change = false;
 552
 553         _ignore_check_change = true;
 554
 555         for (auto const& checked: _checked_screens) {
 556                 if (auto item = screen_to_item(checked)) {
 557                         _targets->CheckItem(*item, wxCHK_CHECKED);
 558                         setup_cinema_checked_state(*item);
 559                 }
 560         }
 561
 562         _ignore_check_change = false;
 563 }
 564
 565
 566 void
 567 ScreensPanel::set_screen_checked (wxTreeListItem item, bool checked)
 568 {
 569         auto screen = item_to_screen(item);
 570         DCPOMATIC_ASSERT(screen);
 571         if (checked) {
 572                 _checked_screens.insert(screen);
 573         } else {
 574                 _checked_screens.erase(screen);
 575         }
 576 }
 577
 578
 579 void
 580 ScreensPanel::setup_cinema_checked_state (wxTreeListItem screen)
 581 {
 582         auto cinema = _targets->GetItemParent(screen);
 583         DCPOMATIC_ASSERT (cinema.IsOk());
 584         int checked = 0;
 585         int unchecked = 0;
 586         for (auto child = _targets->GetFirstChild(cinema); child.IsOk(); child = _targets->GetNextSibling(child)) {
 587                 if (_targets->GetCheckedState(child) == wxCHK_CHECKED) {
 588                     ++checked;
 589                 } else {
 590                     ++unchecked;
 591                 }
 592         }
 593         if (checked == 0) {
 594                 _targets->CheckItem(cinema, wxCHK_UNCHECKED);
 595         } else if (unchecked == 0) {
 596                 _targets->CheckItem(cinema, wxCHK_CHECKED);
 597         } else {
 598                 _targets->CheckItem(cinema, wxCHK_UNDETERMINED);
 599         }
 600 }
 601
 602
 603 void
 604 ScreensPanel::checkbox_changed (wxTreeListEvent& ev)
 605 {
 606         if (_ignore_check_change) {
 607                 return;
 608         }
 609
 610         if (item_to_cinema(ev.GetItem())) {
 611                 /* Cinema: check/uncheck all children */
 612                 auto const checked = _targets->GetCheckedState(ev.GetItem());
 613                 for (auto child = _targets->GetFirstChild(ev.GetItem()); child.IsOk(); child = _targets->GetNextSibling(child)) {
 614                         _targets->CheckItem(child, checked);
 615                         set_screen_checked(child, checked);
 616                 }
 617         } else {
 618                 set_screen_checked(ev.GetItem(), _targets->GetCheckedState(ev.GetItem()));
 619                 setup_cinema_checked_state(ev.GetItem());
 620         }
 621
 622         ScreensChanged ();
 623 }
 624
 625
 626 shared_ptr<Cinema>
 627 ScreensPanel::item_to_cinema (wxTreeListItem item) const
 628 {
 629         auto iter = _item_to_cinema.find (item);
 630         if (iter == _item_to_cinema.end()) {
 631                 return {};
 632         }
 633
 634         return iter->second;
 635 }
 636
 637
 638 shared_ptr<Screen>
 639 ScreensPanel::item_to_screen (wxTreeListItem item) const
 640 {
 641         auto iter = _item_to_screen.find (item);
 642         if (iter == _item_to_screen.end()) {
 643                 return {};
 644         }
 645
 646         return iter->second;
 647 }
 648
 649
 650 optional<wxTreeListItem>
 651 ScreensPanel::cinema_to_item (shared_ptr<Cinema> cinema) const
 652 {
 653         auto iter = _cinema_to_item.find (cinema);
 654         if (iter == _cinema_to_item.end()) {
 655                 return {};
 656         }
 657
 658         return iter->second;
 659 }
 660
 661
 662 optional<wxTreeListItem>
 663 ScreensPanel::screen_to_item (shared_ptr<Screen> screen) const
 664 {
 665         auto iter = _screen_to_item.find (screen);
 666         if (iter == _screen_to_item.end()) {
 667                 return {};
 668         }
 669
 670         return iter->second;
 671 }
 672
 673
 674 bool
 675 ScreensPanel::notify_cinemas_changed()
 676 {
 677         _ignore_cinemas_changed = true;
 678         ScopeGuard sg = [this]() { _ignore_cinemas_changed = false; };
 679
 680         try {
 681                 Config::instance()->changed(Config::CINEMAS);
 682         } catch (FileError& e) {
 683                 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()));
 684                 return false;
 685         }
 686
 687         return true;
 688 }
 689
 690
 691 void
 692 ScreensPanel::config_changed(Config::Property property)
 693 {
 694         if (property == Config::Property::CINEMAS && !_ignore_cinemas_changed) {
 695                 clear_and_re_add();
 696         }
 697 }