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 #include <unicode/putil.h>
  33 #include <unicode/ucol.h>
  34 #include <unicode/uiter.h>
  35 #include <unicode/utypes.h>
  36 #include <unicode/ustring.h>
  37
  38
  39 using std::cout;
  40 using std::make_pair;
  41 using std::make_shared;
  42 using std::map;
  43 using std::pair;
  44 using std::shared_ptr;
  45 using std::string;
  46 using std::vector;
  47 using boost::optional;
  48 #if BOOST_VERSION >= 106100
  49 using namespace boost::placeholders;
  50 #endif
  51 using namespace dcpomatic;
  52
  53
  54 ScreensPanel::ScreensPanel (wxWindow* parent)
  55         : wxPanel (parent, wxID_ANY)
  56 {
  57         auto sizer = new wxBoxSizer (wxVERTICAL);
  58
  59         _search = new wxSearchCtrl (this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxSize(200, search_ctrl_height()));
  60 #ifndef __WXGTK3__
  61         /* The cancel button seems to be strangely broken in GTK3; clicking on it twice sometimes works */
  62         _search->ShowCancelButton (true);
  63 #endif
  64         sizer->Add (_search, 0, wxBOTTOM, DCPOMATIC_SIZER_GAP);
  65
  66         auto targets = new wxBoxSizer (wxHORIZONTAL);
  67         _targets = new wxTreeListCtrl (this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTL_MULTIPLE | wxTL_3STATE | wxTL_NO_HEADER);
  68         _targets->AppendColumn (wxT("foo"));
  69
  70         targets->Add (_targets, 1, wxEXPAND | wxRIGHT, DCPOMATIC_SIZER_GAP);
  71
  72         add_cinemas ();
  73
  74         auto side_buttons = new wxBoxSizer (wxVERTICAL);
  75
  76         auto target_buttons = new wxBoxSizer (wxVERTICAL);
  77
  78         _add_cinema = new Button (this, _("Add Cinema..."));
  79         target_buttons->Add (_add_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  80         _edit_cinema = new Button (this, _("Edit Cinema..."));
  81         target_buttons->Add (_edit_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  82         _remove_cinema = new Button (this, _("Remove Cinema"));
  83         target_buttons->Add (_remove_cinema, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  84         _add_screen = new Button (this, _("Add Screen..."));
  85         target_buttons->Add (_add_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  86         _edit_screen = new Button (this, _("Edit Screen..."));
  87         target_buttons->Add (_edit_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  88         _remove_screen = new Button (this, _("Remove Screen"));
  89         target_buttons->Add (_remove_screen, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  90
  91         side_buttons->Add (target_buttons, 0, 0);
  92
  93         auto check_buttons = new wxBoxSizer (wxVERTICAL);
  94
  95         _check_all = new Button (this, _("Check all"));
  96         check_buttons->Add (_check_all, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  97         _uncheck_all = new Button (this, _("Uncheck all"));
  98         check_buttons->Add (_uncheck_all, 1, wxEXPAND | wxBOTTOM, DCPOMATIC_BUTTON_STACK_GAP);
  99
 100         side_buttons->Add (check_buttons, 1, wxEXPAND | wxTOP, DCPOMATIC_BUTTON_STACK_GAP * 8);
 101
 102         targets->Add (side_buttons, 0, 0);
 103
 104         sizer->Add (targets, 1, wxEXPAND);
 105
 106         _search->Bind        (wxEVT_TEXT, boost::bind (&ScreensPanel::search_changed, this));
 107         _targets->Bind       (wxEVT_TREELIST_SELECTION_CHANGED, &ScreensPanel::selection_changed_shim, this);
 108         _targets->Bind       (wxEVT_TREELIST_ITEM_CHECKED, &ScreensPanel::checkbox_changed, this);
 109
 110         _add_cinema->Bind    (wxEVT_BUTTON, boost::bind (&ScreensPanel::add_cinema_clicked, this));
 111         _edit_cinema->Bind   (wxEVT_BUTTON, boost::bind (&ScreensPanel::edit_cinema_clicked, this));
 112         _remove_cinema->Bind (wxEVT_BUTTON, boost::bind (&ScreensPanel::remove_cinema_clicked, this));
 113
 114         _add_screen->Bind    (wxEVT_BUTTON, boost::bind (&ScreensPanel::add_screen_clicked, this));
 115         _edit_screen->Bind   (wxEVT_BUTTON, boost::bind (&ScreensPanel::edit_screen_clicked, this));
 116         _remove_screen->Bind (wxEVT_BUTTON, boost::bind (&ScreensPanel::remove_screen_clicked, this));
 117
 118         _check_all->Bind     (wxEVT_BUTTON, boost::bind(&ScreensPanel::check_all, this));
 119         _uncheck_all->Bind   (wxEVT_BUTTON, boost::bind(&ScreensPanel::uncheck_all, this));
 120
 121         SetSizer (sizer);
 122
 123         UErrorCode status = U_ZERO_ERROR;
 124         _collator = ucol_open(nullptr, &status);
 125         if (_collator) {
 126                 ucol_setAttribute(_collator, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
 127                 ucol_setAttribute(_collator, UCOL_STRENGTH, UCOL_PRIMARY, &status);
 128                 ucol_setAttribute(_collator, UCOL_ALTERNATE_HANDLING, UCOL_SHIFTED, &status);
 129         }
 130
 131         _config_connection = Config::instance()->Changed.connect(boost::bind(&ScreensPanel::config_changed, this, _1));
 132 }
 133
 134
 135 ScreensPanel::~ScreensPanel ()
 136 {
 137         _targets->Unbind (wxEVT_TREELIST_SELECTION_CHANGED, &ScreensPanel::selection_changed_shim, this);
 138         _targets->Unbind (wxEVT_TREELIST_ITEM_CHECKED, &ScreensPanel::checkbox_changed, this);
 139
 140         if (_collator) {
 141                 ucol_close (_collator);
 142         }
 143 }
 144
 145
 146 void
 147 ScreensPanel::check_all ()
 148 {
 149         for (auto cinema = _targets->GetFirstChild(_targets->GetRootItem()); cinema.IsOk();  cinema = _targets->GetNextSibling(cinema)) {
 150                 _targets->CheckItem(cinema, wxCHK_CHECKED);
 151                 for (auto screen = _targets->GetFirstChild(cinema); screen.IsOk(); screen = _targets->GetNextSibling(screen)) {
 152                         _targets->CheckItem(screen, wxCHK_CHECKED);
 153                         set_screen_checked(screen, true);
 154                 }
 155         }
 156 }
 157
 158
 159 void
 160 ScreensPanel::uncheck_all ()
 161 {
 162         for (auto cinema = _targets->GetFirstChild(_targets->GetRootItem()); cinema.IsOk();  cinema = _targets->GetNextSibling(cinema)) {
 163                 _targets->CheckItem(cinema, wxCHK_UNCHECKED);
 164                 for (auto screen = _targets->GetFirstChild(cinema); screen.IsOk(); screen = _targets->GetNextSibling(screen)) {
 165                         _targets->CheckItem(screen, wxCHK_UNCHECKED);
 166                         set_screen_checked(screen, false);
 167                 }
 168         }
 169 }
 170
 171
 172 void
 173 ScreensPanel::setup_sensitivity ()
 174 {
 175         bool const sc = _selected_cinemas.size() == 1;
 176         bool const ss = _selected_screens.size() == 1;
 177
 178         _edit_cinema->Enable (sc || ss);
 179         _remove_cinema->Enable (_selected_cinemas.size() >= 1);
 180
 181         _add_screen->Enable (sc || ss);
 182         _edit_screen->Enable (ss);
 183         _remove_screen->Enable (_selected_screens.size() >= 1);
 184 }
 185
 186
 187 optional<wxTreeListItem>
 188 ScreensPanel::add_cinema (shared_ptr<Cinema> cinema, wxTreeListItem previous)
 189 {
 190         auto search = wx_to_std (_search->GetValue ());
 191         transform (search.begin(), search.end(), search.begin(), ::tolower);
 192
 193         if (!search.empty ()) {
 194                 auto name = cinema->name;
 195                 transform (name.begin(), name.end(), name.begin(), ::tolower);
 196                 if (name.find (search) == string::npos) {
 197                         return {};
 198                 }
 199         }
 200
 201         auto id = _targets->InsertItem(_targets->GetRootItem(), previous, std_to_wx(cinema->name));
 202
 203         _item_to_cinema[id] = cinema;
 204         _cinema_to_item[cinema] = id;
 205
 206         for (auto screen: cinema->screens()) {
 207                 add_screen (cinema, screen);
 208         }
 209
 210         return id;
 211 }
 212
 213
 214 optional<wxTreeListItem>
 215 ScreensPanel::add_screen (shared_ptr<Cinema> cinema, shared_ptr<Screen> screen)
 216 {
 217         auto item = cinema_to_item(cinema);
 218         if (!item) {
 219                 return {};
 220         }
 221
 222         auto id = _targets->AppendItem(*item, std_to_wx(screen->name));
 223
 224         _item_to_screen[id] = screen;
 225         _screen_to_item[screen] = id;
 226
 227         return item;
 228 }
 229
 230
 231 void
 232 ScreensPanel::add_cinema_clicked ()
 233 {
 234         auto dialog = new CinemaDialog (GetParent(), _("Add Cinema"));
 235         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 236
 237         if (dialog->ShowModal() == wxID_OK) {
 238                 auto cinema = make_shared<Cinema>(dialog->name(), dialog->emails(), dialog->notes(), dialog->utc_offset_hour(), dialog->utc_offset_minute());
 239
 240                 auto cinemas = Config::instance()->cinemas();
 241                 cinemas.sort(
 242                         [this](shared_ptr<Cinema> a, shared_ptr<Cinema> b) { return compare(a->name, b->name) < 0; }
 243                         );
 244
 245                 try {
 246                         _ignore_cinemas_changed = true;
 247                         ScopeGuard sg = [this]() { _ignore_cinemas_changed = false; };
 248                         Config::instance()->add_cinema(cinema);
 249                 } catch (FileError& e) {
 250                         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()));
 251                         return;
 252                 }
 253
 254                 wxTreeListItem previous = wxTLI_FIRST;
 255                 bool found = false;
 256                 for (auto existing_cinema: cinemas) {
 257                         if (compare(dialog->name(), existing_cinema->name) < 0) {
 258                                 /* existing_cinema should be after the one we're inserting */
 259                                 found = true;
 260                                 break;
 261                         }
 262                         auto item = cinema_to_item(existing_cinema);
 263                         DCPOMATIC_ASSERT(item);
 264                         previous = *item;
 265                 }
 266
 267                 auto item = add_cinema(cinema, found ? previous : wxTLI_LAST);
 268
 269                 if (item) {
 270                         _targets->UnselectAll ();
 271                         _targets->Select (*item);
 272                 }
 273         }
 274
 275         selection_changed ();
 276 }
 277
 278
 279 shared_ptr<Cinema>
 280 ScreensPanel::cinema_for_operation () const
 281 {
 282         if (_selected_cinemas.size() == 1) {
 283                 return _selected_cinemas[0];
 284         } else if (_selected_screens.size() == 1) {
 285                 return _selected_screens[0]->cinema;
 286         }
 287
 288         return {};
 289 }
 290
 291
 292 void
 293 ScreensPanel::edit_cinema_clicked ()
 294 {
 295         auto cinema = cinema_for_operation ();
 296         if (!cinema) {
 297                 return;
 298         }
 299
 300         auto dialog = new CinemaDialog(
 301                 GetParent(), _("Edit cinema"), cinema->name, cinema->emails, cinema->notes, cinema->utc_offset_hour(), cinema->utc_offset_minute()
 302                 );
 303         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 304
 305         if (dialog->ShowModal() == wxID_OK) {
 306                 cinema->name = dialog->name();
 307                 cinema->emails = dialog->emails();
 308                 cinema->notes = dialog->notes();
 309                 cinema->set_utc_offset_hour(dialog->utc_offset_hour());
 310                 cinema->set_utc_offset_minute(dialog->utc_offset_minute());
 311                 notify_cinemas_changed();
 312                 auto item = cinema_to_item(cinema);
 313                 DCPOMATIC_ASSERT(item);
 314                 _targets->SetItemText (*item, std_to_wx(dialog->name()));
 315         }
 316 }
 317
 318
 319 void
 320 ScreensPanel::remove_cinema_clicked ()
 321 {
 322         if (_selected_cinemas.size() == 1) {
 323                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove the cinema '%s'?"), std_to_wx(_selected_cinemas[0]->name)))) {
 324                         return;
 325                 }
 326         } else {
 327                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove %d cinemas?"), int(_selected_cinemas.size())))) {
 328                         return;
 329                 }
 330         }
 331
 332         for (auto const& cinema: _selected_cinemas) {
 333                 _ignore_cinemas_changed = true;
 334                 ScopeGuard sg = [this]() { _ignore_cinemas_changed = false; };
 335                 Config::instance()->remove_cinema(cinema);
 336                 auto item = cinema_to_item(cinema);
 337                 DCPOMATIC_ASSERT(item);
 338                 _targets->DeleteItem(*item);
 339         }
 340
 341         selection_changed ();
 342 }
 343
 344
 345 void
 346 ScreensPanel::add_screen_clicked ()
 347 {
 348         auto cinema = cinema_for_operation ();
 349         if (!cinema) {
 350                 return;
 351         }
 352
 353         auto dialog = new ScreenDialog(GetParent(), _("Add Screen"));
 354         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 355
 356         if (dialog->ShowModal () != wxID_OK) {
 357                 return;
 358         }
 359
 360         for (auto screen: cinema->screens()) {
 361                 if (screen->name == dialog->name()) {
 362                         error_dialog (
 363                                 GetParent(),
 364                                 wxString::Format (
 365                                         _("You cannot add a screen called '%s' as the cinema already has a screen with this name."),
 366                                         std_to_wx(dialog->name()).data()
 367                                         )
 368                                 );
 369                         return;
 370                 }
 371         }
 372
 373         auto screen = std::make_shared<Screen>(dialog->name(), dialog->notes(), dialog->recipient(), dialog->recipient_file(), dialog->trusted_devices());
 374         cinema->add_screen (screen);
 375         notify_cinemas_changed();
 376
 377         auto id = add_screen (cinema, screen);
 378         if (id) {
 379                 _targets->Expand (id.get ());
 380         }
 381 }
 382
 383
 384 void
 385 ScreensPanel::edit_screen_clicked ()
 386 {
 387         if (_selected_screens.size() != 1) {
 388                 return;
 389         }
 390
 391         auto edit_screen = _selected_screens[0];
 392
 393         auto dialog = new ScreenDialog(
 394                 GetParent(), _("Edit screen"),
 395                 edit_screen->name,
 396                 edit_screen->notes,
 397                 edit_screen->recipient,
 398                 edit_screen->recipient_file,
 399                 edit_screen->trusted_devices
 400                 );
 401         ScopeGuard sg = [dialog]() { dialog->Destroy(); };
 402
 403         if (dialog->ShowModal() != wxID_OK) {
 404                 return;
 405         }
 406
 407         auto cinema = edit_screen->cinema;
 408         for (auto screen: cinema->screens()) {
 409                 if (screen != edit_screen && screen->name == dialog->name()) {
 410                         error_dialog (
 411                                 GetParent(),
 412                                 wxString::Format (
 413                                         _("You cannot change this screen's name to '%s' as the cinema already has a screen with this name."),
 414                                         std_to_wx(dialog->name()).data()
 415                                         )
 416                                 );
 417                         return;
 418                 }
 419         }
 420
 421         edit_screen->name = dialog->name();
 422         edit_screen->notes = dialog->notes();
 423         edit_screen->recipient = dialog->recipient();
 424         edit_screen->recipient_file = dialog->recipient_file();
 425         edit_screen->trusted_devices = dialog->trusted_devices();
 426         notify_cinemas_changed();
 427
 428         auto item = screen_to_item(edit_screen);
 429         DCPOMATIC_ASSERT (item);
 430         _targets->SetItemText (*item, std_to_wx(dialog->name()));
 431 }
 432
 433
 434 void
 435 ScreensPanel::remove_screen_clicked ()
 436 {
 437         if (_selected_screens.size() == 1) {
 438                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove the screen '%s'?"), std_to_wx(_selected_screens[0]->name)))) {
 439                         return;
 440                 }
 441         } else {
 442                 if (!confirm_dialog(this, wxString::Format(_("Are you sure you want to remove %d screens?"), int(_selected_screens.size())))) {
 443                         return;
 444                 }
 445         }
 446
 447         for (auto const& screen: _selected_screens) {
 448                 screen->cinema->remove_screen(screen);
 449                 auto item = screen_to_item(screen);
 450                 DCPOMATIC_ASSERT(item);
 451                 _targets->DeleteItem(*item);
 452         }
 453
 454         notify_cinemas_changed();
 455 }
 456
 457
 458 vector<shared_ptr<Screen>>
 459 ScreensPanel::screens () const
 460 {
 461         vector<shared_ptr<Screen>> output;
 462         std::copy (_checked_screens.begin(), _checked_screens.end(), std::back_inserter(output));
 463         return output;
 464 }
 465
 466
 467 void
 468 ScreensPanel::selection_changed_shim (wxTreeListEvent &)
 469 {
 470         selection_changed ();
 471 }
 472
 473
 474 void
 475 ScreensPanel::selection_changed ()
 476 {
 477         if (_ignore_selection_change) {
 478                 return;
 479         }
 480
 481         wxTreeListItems selection;
 482         _targets->GetSelections (selection);
 483
 484         _selected_cinemas.clear ();
 485         _selected_screens.clear ();
 486
 487         for (size_t i = 0; i < selection.size(); ++i) {
 488                 if (auto cinema = item_to_cinema(selection[i])) {
 489                         _selected_cinemas.push_back(cinema);
 490                 }
 491                 if (auto screen = item_to_screen(selection[i])) {
 492                         _selected_screens.push_back(screen);
 493                 }
 494         }
 495
 496         setup_sensitivity ();
 497 }
 498
 499
 500 void
 501 ScreensPanel::add_cinemas ()
 502 {
 503         auto cinemas = Config::instance()->cinemas();
 504         cinemas.sort(
 505                 [this](shared_ptr<Cinema> a, shared_ptr<Cinema> b) { return compare(a->name, b->name) < 0; }
 506                 );
 507
 508         for (auto cinema: cinemas) {
 509                 add_cinema (cinema, wxTLI_LAST);
 510         }
 511 }
 512
 513
 514 void
 515 ScreensPanel::clear_and_re_add()
 516 {
 517         _targets->DeleteAllItems ();
 518
 519         _item_to_cinema.clear ();
 520         _cinema_to_item.clear ();
 521         _item_to_screen.clear ();
 522         _screen_to_item.clear ();
 523
 524         add_cinemas ();
 525 }
 526
 527
 528 void
 529 ScreensPanel::search_changed ()
 530 {
 531         clear_and_re_add();
 532
 533         _ignore_selection_change = true;
 534
 535         for (auto const& selection: _selected_cinemas) {
 536                 if (auto item = cinema_to_item(selection)) {
 537                         _targets->Select (*item);
 538                 }
 539         }
 540
 541         for (auto const& selection: _selected_screens) {
 542                 if (auto item = screen_to_item(selection)) {
 543                         _targets->Select (*item);
 544                 }
 545         }
 546
 547         _ignore_selection_change = false;
 548
 549         _ignore_check_change = true;
 550
 551         for (auto const& checked: _checked_screens) {
 552                 if (auto item = screen_to_item(checked)) {
 553                         _targets->CheckItem(*item, wxCHK_CHECKED);
 554                         setup_cinema_checked_state(*item);
 555                 }
 556         }
 557
 558         _ignore_check_change = false;
 559 }
 560
 561
 562 void
 563 ScreensPanel::set_screen_checked (wxTreeListItem item, bool checked)
 564 {
 565         auto screen = item_to_screen(item);
 566         DCPOMATIC_ASSERT(screen);
 567         if (checked) {
 568                 _checked_screens.insert(screen);
 569         } else {
 570                 _checked_screens.erase(screen);
 571         }
 572 }
 573
 574
 575 void
 576 ScreensPanel::setup_cinema_checked_state (wxTreeListItem screen)
 577 {
 578         auto cinema = _targets->GetItemParent(screen);
 579         DCPOMATIC_ASSERT (cinema.IsOk());
 580         int checked = 0;
 581         int unchecked = 0;
 582         for (auto child = _targets->GetFirstChild(cinema); child.IsOk(); child = _targets->GetNextSibling(child)) {
 583                 if (_targets->GetCheckedState(child) == wxCHK_CHECKED) {
 584                     ++checked;
 585                 } else {
 586                     ++unchecked;
 587                 }
 588         }
 589         if (checked == 0) {
 590                 _targets->CheckItem(cinema, wxCHK_UNCHECKED);
 591         } else if (unchecked == 0) {
 592                 _targets->CheckItem(cinema, wxCHK_CHECKED);
 593         } else {
 594                 _targets->CheckItem(cinema, wxCHK_UNDETERMINED);
 595         }
 596 }
 597
 598
 599 void
 600 ScreensPanel::checkbox_changed (wxTreeListEvent& ev)
 601 {
 602         if (_ignore_check_change) {
 603                 return;
 604         }
 605
 606         if (item_to_cinema(ev.GetItem())) {
 607                 /* Cinema: check/uncheck all children */
 608                 auto const checked = _targets->GetCheckedState(ev.GetItem());
 609                 for (auto child = _targets->GetFirstChild(ev.GetItem()); child.IsOk(); child = _targets->GetNextSibling(child)) {
 610                         _targets->CheckItem(child, checked);
 611                         set_screen_checked(child, checked);
 612                 }
 613         } else {
 614                 set_screen_checked(ev.GetItem(), _targets->GetCheckedState(ev.GetItem()));
 615                 setup_cinema_checked_state(ev.GetItem());
 616         }
 617
 618         ScreensChanged ();
 619 }
 620
 621
 622 shared_ptr<Cinema>
 623 ScreensPanel::item_to_cinema (wxTreeListItem item) const
 624 {
 625         auto iter = _item_to_cinema.find (item);
 626         if (iter == _item_to_cinema.end()) {
 627                 return {};
 628         }
 629
 630         return iter->second;
 631 }
 632
 633
 634 shared_ptr<Screen>
 635 ScreensPanel::item_to_screen (wxTreeListItem item) const
 636 {
 637         auto iter = _item_to_screen.find (item);
 638         if (iter == _item_to_screen.end()) {
 639                 return {};
 640         }
 641
 642         return iter->second;
 643 }
 644
 645
 646 optional<wxTreeListItem>
 647 ScreensPanel::cinema_to_item (shared_ptr<Cinema> cinema) const
 648 {
 649         auto iter = _cinema_to_item.find (cinema);
 650         if (iter == _cinema_to_item.end()) {
 651                 return {};
 652         }
 653
 654         return iter->second;
 655 }
 656
 657
 658 optional<wxTreeListItem>
 659 ScreensPanel::screen_to_item (shared_ptr<Screen> screen) const
 660 {
 661         auto iter = _screen_to_item.find (screen);
 662         if (iter == _screen_to_item.end()) {
 663                 return {};
 664         }
 665
 666         return iter->second;
 667 }
 668
 669
 670 int
 671 ScreensPanel::compare (string const& utf8_a, string const& utf8_b)
 672 {
 673         if (_collator) {
 674                 UErrorCode error = U_ZERO_ERROR;
 675                 boost::scoped_array<uint16_t> utf16_a(new uint16_t[utf8_a.size() + 1]);
 676                 u_strFromUTF8(reinterpret_cast<UChar*>(utf16_a.get()), utf8_a.size() + 1, nullptr, utf8_a.c_str(), -1, &error);
 677                 boost::scoped_array<uint16_t> utf16_b(new uint16_t[utf8_b.size() + 1]);
 678                 u_strFromUTF8(reinterpret_cast<UChar*>(utf16_b.get()), utf8_b.size() + 1, nullptr, utf8_b.c_str(), -1, &error);
 679                 return ucol_strcoll(_collator, reinterpret_cast<UChar*>(utf16_a.get()), -1, reinterpret_cast<UChar*>(utf16_b.get()), -1);
 680         } else {
 681                 return strcoll(utf8_a.c_str(), utf8_b.c_str());
 682         }
 683 }
 684
 685
 686 bool
 687 ScreensPanel::notify_cinemas_changed()
 688 {
 689         _ignore_cinemas_changed = true;
 690         ScopeGuard sg = [this]() { _ignore_cinemas_changed = false; };
 691
 692         try {
 693                 Config::instance()->changed(Config::CINEMAS);
 694         } catch (FileError& e) {
 695                 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()));
 696                 return false;
 697         }
 698
 699         return true;
 700 }
 701
 702
 703 void
 704 ScreensPanel::config_changed(Config::Property property)
 705 {
 706         if (property == Config::Property::CINEMAS && !_ignore_cinemas_changed) {
 707                 clear_and_re_add();
 708         }
 709 }
 710
 711