src/tools/dcpomatic.cc

   1 /*
   2     Copyright (C) 2012-2013 Carl Hetherington <cth@carlh.net>
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <iostream>
  21 #include <fstream>
  22 #include <boost/filesystem.hpp>
  23 #ifdef __WXMSW__
  24 #include <shellapi.h>
  25 #endif
  26 #ifdef __WXOSX__
  27 #include <ApplicationServices/ApplicationServices.h>
  28 #endif
  29 #include <wx/generic/aboutdlgg.h>
  30 #include <wx/stdpaths.h>
  31 #include <wx/cmdline.h>
  32 #include "wx/film_viewer.h"
  33 #include "wx/film_editor.h"
  34 #include "wx/job_manager_view.h"
  35 #include "wx/config_dialog.h"
  36 #include "wx/job_wrapper.h"
  37 #include "wx/wx_util.h"
  38 #include "wx/new_film_dialog.h"
  39 #include "wx/properties_dialog.h"
  40 #include "wx/wx_ui_signaller.h"
  41 #include "wx/about_dialog.h"
  42 #include "wx/kdm_dialog.h"
  43 #include "wx/servers_list_dialog.h"
  44 #include "wx/hints_dialog.h"
  45 #include "lib/film.h"
  46 #include "lib/config.h"
  47 #include "lib/util.h"
  48 #include "lib/version.h"
  49 #include "lib/ui_signaller.h"
  50 #include "lib/log.h"
  51 #include "lib/job_manager.h"
  52 #include "lib/transcode_job.h"
  53 #include "lib/exceptions.h"
  54 #include "lib/cinema.h"
  55 #include "lib/kdm.h"
  56
  57 using std::cout;
  58 using std::string;
  59 using std::wstring;
  60 using std::stringstream;
  61 using std::map;
  62 using std::make_pair;
  63 using std::list;
  64 using std::exception;
  65 using boost::shared_ptr;
  66 using boost::dynamic_pointer_cast;
  67
  68 static FilmEditor* film_editor = 0;
  69 static FilmViewer* film_viewer = 0;
  70 static shared_ptr<Film> film;
  71 static std::string log_level;
  72 static std::string film_to_load;
  73 static std::string film_to_create;
  74 static wxMenu* jobs_menu = 0;
  75
  76 static void set_menu_sensitivity ();
  77
  78 class FilmChangedDialog
  79 {
  80 public:
  81         FilmChangedDialog ()
  82         {
  83                 _dialog = new wxMessageDialog (
  84                         0,
  85                         wxString::Format (_("Save changes to film \"%s\" before closing?"), std_to_wx (film->name ()).data()),
  86                         _("Film changed"),
  87                         wxYES_NO | wxYES_DEFAULT | wxICON_QUESTION
  88                         );
  89         }
  90
  91         ~FilmChangedDialog ()
  92         {
  93                 _dialog->Destroy ();
  94         }
  95
  96         int run ()
  97         {
  98                 return _dialog->ShowModal ();
  99         }
 100
 101 private:
 102         /* Not defined */
 103         FilmChangedDialog (FilmChangedDialog const &);
 104
 105         wxMessageDialog* _dialog;
 106 };
 107
 108
 109 void
 110 maybe_save_then_delete_film ()
 111 {
 112         if (!film) {
 113                 return;
 114         }
 115
 116         if (film->dirty ()) {
 117                 FilmChangedDialog d;
 118                 switch (d.run ()) {
 119                 case wxID_NO:
 120                         break;
 121                 case wxID_YES:
 122                         film->write_metadata ();
 123                         break;
 124                 }
 125         }
 126
 127         film.reset ();
 128 }
 129
 130 #define ALWAYS                  0x0
 131 #define NEEDS_FILM              0x1
 132 #define NOT_DURING_DCP_CREATION 0x2
 133 #define NEEDS_DCP               0x4
 134
 135 map<wxMenuItem*, int> menu_items;
 136
 137 void
 138 add_item (wxMenu* menu, wxString text, int id, int sens)
 139 {
 140         wxMenuItem* item = menu->Append (id, text);
 141         menu_items.insert (make_pair (item, sens));
 142 }
 143
 144 void
 145 set_menu_sensitivity ()
 146 {
 147         list<shared_ptr<Job> > jobs = JobManager::instance()->get ();
 148         list<shared_ptr<Job> >::iterator i = jobs.begin();
 149         while (i != jobs.end() && dynamic_pointer_cast<TranscodeJob> (*i) == 0) {
 150                 ++i;
 151         }
 152         bool const dcp_creation = (i != jobs.end ()) && !(*i)->finished ();
 153         bool const have_dcp = film && !film->dcps().empty ();
 154
 155         for (map<wxMenuItem*, int>::iterator j = menu_items.begin(); j != menu_items.end(); ++j) {
 156
 157                 bool enabled = true;
 158
 159                 if ((j->second & NEEDS_FILM) && film == 0) {
 160                         enabled = false;
 161                 }
 162
 163                 if ((j->second & NOT_DURING_DCP_CREATION) && dcp_creation) {
 164                         enabled = false;
 165                 }
 166
 167                 if ((j->second & NEEDS_DCP) && !have_dcp) {
 168                         enabled = false;
 169                 }
 170
 171                 j->first->Enable (enabled);
 172         }
 173 }
 174
 175 enum {
 176         ID_file_new = 1,
 177         ID_file_open,
 178         ID_file_save,
 179         ID_file_properties,
 180         ID_jobs_make_dcp,
 181         ID_jobs_make_kdms,
 182         ID_jobs_send_dcp_to_tms,
 183         ID_jobs_show_dcp,
 184         ID_tools_hints,
 185         ID_tools_encoding_servers,
 186 };
 187
 188 void
 189 setup_menu (wxMenuBar* m)
 190 {
 191         wxMenu* file = new wxMenu;
 192         add_item (file, _("New..."), ID_file_new, ALWAYS);
 193         add_item (file, _("&Open..."), ID_file_open, ALWAYS);
 194         file->AppendSeparator ();
 195         add_item (file, _("&Save"), ID_file_save, NEEDS_FILM);
 196         file->AppendSeparator ();
 197         add_item (file, _("&Properties..."), ID_file_properties, NEEDS_FILM);
 198 #ifndef __WXOSX__
 199         file->AppendSeparator ();
 200 #endif
 201
 202 #ifdef __WXOSX__
 203         add_item (file, _("&Exit"), wxID_EXIT, ALWAYS);
 204 #else
 205         add_item (file, _("&Quit"), wxID_EXIT, ALWAYS);
 206 #endif
 207
 208
 209 #ifdef __WXOSX__
 210         add_item (file, _("&Preferences..."), wxID_PREFERENCES, ALWAYS);
 211 #else
 212         wxMenu* edit = new wxMenu;
 213         add_item (edit, _("&Preferences..."), wxID_PREFERENCES, ALWAYS);
 214 #endif
 215
 216         jobs_menu = new wxMenu;
 217         add_item (jobs_menu, _("&Make DCP"), ID_jobs_make_dcp, NEEDS_FILM | NOT_DURING_DCP_CREATION);
 218         add_item (jobs_menu, _("Make &KDMs..."), ID_jobs_make_kdms, NEEDS_FILM | NEEDS_DCP);
 219         add_item (jobs_menu, _("&Send DCP to TMS"), ID_jobs_send_dcp_to_tms, NEEDS_FILM | NOT_DURING_DCP_CREATION | NEEDS_DCP);
 220         add_item (jobs_menu, _("S&how DCP"), ID_jobs_show_dcp, NEEDS_FILM | NOT_DURING_DCP_CREATION | NEEDS_DCP);
 221
 222         wxMenu* tools = new wxMenu;
 223         add_item (tools, _("Hints..."), ID_tools_hints, 0);
 224         add_item (tools, _("Encoding Servers..."), ID_tools_encoding_servers, 0);
 225
 226         wxMenu* help = new wxMenu;
 227 #ifdef __WXOSX__
 228         add_item (help, _("About DCP-o-matic"), wxID_ABOUT, ALWAYS);
 229 #else
 230         add_item (help, _("About"), wxID_ABOUT, ALWAYS);
 231 #endif
 232
 233         m->Append (file, _("&File"));
 234 #ifndef __WXOSX__
 235         m->Append (edit, _("&Edit"));
 236 #endif
 237         m->Append (jobs_menu, _("&Jobs"));
 238         m->Append (tools, _("&Tools"));
 239         m->Append (help, _("&Help"));
 240 }
 241
 242 class Frame : public wxFrame
 243 {
 244 public:
 245         Frame (wxString const & title)
 246                 : wxFrame (NULL, -1, title)
 247                 , _servers_list_dialog (0)
 248         {
 249                 wxMenuBar* bar = new wxMenuBar;
 250                 setup_menu (bar);
 251                 SetMenuBar (bar);
 252
 253                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::file_new, this),               ID_file_new);
 254                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::file_open, this),              ID_file_open);
 255                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::file_save, this),              ID_file_save);
 256                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::file_properties, this),        ID_file_properties);
 257                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::file_exit, this),              wxID_EXIT);
 258                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::edit_preferences, this),       wxID_PREFERENCES);
 259                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::jobs_make_dcp, this),          ID_jobs_make_dcp);
 260                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::jobs_make_kdms, this),         ID_jobs_make_kdms);
 261                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::jobs_send_dcp_to_tms, this),   ID_jobs_send_dcp_to_tms);
 262                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::jobs_show_dcp, this),          ID_jobs_show_dcp);
 263                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::tools_hints, this),            ID_tools_hints);
 264                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::tools_encoding_servers, this), ID_tools_encoding_servers);
 265                 Bind (wxEVT_COMMAND_MENU_SELECTED, boost::bind (&Frame::help_about, this),             wxID_ABOUT);
 266
 267                 Bind (wxEVT_CLOSE_WINDOW, boost::bind (&Frame::close, this, _1));
 268
 269                 /* Use a panel as the only child of the Frame so that we avoid
 270                    the dark-grey background on Windows.
 271                 */
 272                 wxPanel* overall_panel = new wxPanel (this, wxID_ANY);
 273
 274                 film_editor = new FilmEditor (film, overall_panel);
 275                 film_viewer = new FilmViewer (film, overall_panel);
 276                 JobManagerView* job_manager_view = new JobManagerView (overall_panel, static_cast<JobManagerView::Buttons> (0));
 277
 278                 wxBoxSizer* right_sizer = new wxBoxSizer (wxVERTICAL);
 279                 right_sizer->Add (film_viewer, 2, wxEXPAND | wxALL, 6);
 280                 right_sizer->Add (job_manager_view, 1, wxEXPAND | wxALL, 6);
 281
 282                 wxBoxSizer* main_sizer = new wxBoxSizer (wxHORIZONTAL);
 283                 main_sizer->Add (film_editor, 1, wxEXPAND | wxALL, 6);
 284                 main_sizer->Add (right_sizer, 2, wxEXPAND | wxALL, 6);
 285
 286                 set_menu_sensitivity ();
 287
 288                 film_editor->FileChanged.connect (bind (&Frame::file_changed, this, _1));
 289                 if (film) {
 290                         file_changed (film->directory ());
 291                 } else {
 292                         file_changed ("");
 293                 }
 294
 295                 JobManager::instance()->ActiveJobsChanged.connect (boost::bind (set_menu_sensitivity));
 296
 297                 set_film ();
 298                 overall_panel->SetSizer (main_sizer);
 299         }
 300
 301 private:
 302
 303         void set_film ()
 304         {
 305                 film_viewer->set_film (film);
 306                 film_editor->set_film (film);
 307                 set_menu_sensitivity ();
 308         }
 309
 310         void file_changed (boost::filesystem::path f)
 311         {
 312                 stringstream s;
 313                 s << wx_to_std (_("DCP-o-matic"));
 314                 if (!f.empty ()) {
 315                         s << " - " << f.string ();
 316                 }
 317
 318                 SetTitle (std_to_wx (s.str()));
 319         }
 320
 321         void file_new ()
 322         {
 323                 NewFilmDialog* d = new NewFilmDialog (this);
 324                 int const r = d->ShowModal ();
 325
 326                 if (r == wxID_OK) {
 327
 328                         if (boost::filesystem::is_directory (d->get_path()) && !boost::filesystem::is_empty(d->get_path())) {
 329                                 if (!confirm_dialog (
 330                                             this,
 331                                             std_to_wx (
 332                                                     String::compose (wx_to_std (_("The directory %1 already exists and is not empty.  "
 333                                                                                   "Are you sure you want to use it?")),
 334                                                                      d->get_path().c_str())
 335                                                     )
 336                                             )) {
 337                                         return;
 338                                 }
 339                         } else if (boost::filesystem::is_regular_file (d->get_path())) {
 340                                 error_dialog (
 341                                         this,
 342                                         String::compose (wx_to_std (_("%1 already exists as a file, so you cannot use it for a new film.")), d->get_path().c_str())
 343                                         );
 344                                 return;
 345                         }
 346
 347                         maybe_save_then_delete_film ();
 348                         film.reset (new Film (d->get_path ()));
 349                         film->write_metadata ();
 350                         film->log()->set_level (log_level);
 351                         film->set_name (boost::filesystem::path (d->get_path()).filename().generic_string());
 352                         set_film ();
 353                 }
 354
 355                 d->Destroy ();
 356         }
 357
 358         void file_open ()
 359         {
 360                 wxDirDialog* c = new wxDirDialog (
 361                         this,
 362                         _("Select film to open"),
 363                         std_to_wx (Config::instance()->default_directory_or (wx_to_std (wxStandardPaths::Get().GetDocumentsDir())).string ()),
 364                         wxDEFAULT_DIALOG_STYLE | wxDD_DIR_MUST_EXIST
 365                         );
 366
 367                 int r;
 368                 while (1) {
 369                         r = c->ShowModal ();
 370                         if (r == wxID_OK && c->GetPath() == wxStandardPaths::Get().GetDocumentsDir()) {
 371                                 error_dialog (this, _("You did not select a folder.  Make sure that you select a folder before clicking Open."));
 372                         } else {
 373                                 break;
 374                         }
 375                 }
 376
 377                 if (r == wxID_OK) {
 378                         maybe_save_then_delete_film ();
 379                         try {
 380                                 film.reset (new Film (wx_to_std (c->GetPath ())));
 381                                 film->read_metadata ();
 382                                 film->log()->set_level (log_level);
 383                                 set_film ();
 384                         } catch (std::exception& e) {
 385                                 wxString p = c->GetPath ();
 386                                 wxCharBuffer b = p.ToUTF8 ();
 387                                 error_dialog (this, wxString::Format (_("Could not open film at %s (%s)"), p.data(), std_to_wx (e.what()).data()));
 388                         }
 389                 }
 390
 391                 c->Destroy ();
 392         }
 393
 394         void file_save ()
 395         {
 396                 film->write_metadata ();
 397         }
 398
 399         void file_properties ()
 400         {
 401                 PropertiesDialog* d = new PropertiesDialog (this, film);
 402                 d->ShowModal ();
 403                 d->Destroy ();
 404         }
 405
 406         void file_exit ()
 407         {
 408                 if (!should_close ()) {
 409                         return;
 410                 }
 411
 412                 maybe_save_then_delete_film ();
 413                 Close (true);
 414         }
 415
 416         void edit_preferences ()
 417         {
 418                 ConfigDialog* d = new ConfigDialog (this);
 419                 d->ShowModal ();
 420                 d->Destroy ();
 421                 Config::instance()->write ();
 422         }
 423
 424         void jobs_make_dcp ()
 425         {
 426                 JobWrapper::make_dcp (this, film);
 427         }
 428
 429         void jobs_make_kdms ()
 430         {
 431                 if (!film) {
 432                         return;
 433                 }
 434
 435                 KDMDialog* d = new KDMDialog (this, film);
 436                 if (d->ShowModal () != wxID_OK) {
 437                         d->Destroy ();
 438                         return;
 439                 }
 440
 441                 try {
 442                         if (d->write_to ()) {
 443                                 write_kdm_files (film, d->screens (), d->dcp (), d->from (), d->until (), d->directory ());
 444                         } else {
 445                                 email_kdms (film, d->screens (), d->dcp (), d->from (), d->until ());
 446                         }
 447                 } catch (KDMError& e) {
 448                         error_dialog (this, e.what ());
 449                 }
 450
 451                 d->Destroy ();
 452         }
 453
 454         void jobs_send_dcp_to_tms ()
 455         {
 456                 film->send_dcp_to_tms ();
 457         }
 458
 459         void jobs_show_dcp ()
 460         {
 461 #ifdef __WXMSW__
 462                 string d = film->directory().string ();
 463                 wstring w;
 464                 w.assign (d.begin(), d.end());
 465                 ShellExecute (0, L"open", w.c_str(), 0, 0, SW_SHOWDEFAULT);
 466 #else
 467                 int r = system ("which nautilus");
 468                 if (WEXITSTATUS (r) == 0) {
 469                         r = system (string ("nautilus " + film->directory().string()).c_str ());
 470                         if (WEXITSTATUS (r)) {
 471                                 error_dialog (this, _("Could not show DCP (could not run nautilus)"));
 472                         }
 473                 } else {
 474                         int r = system ("which konqueror");
 475                         if (WEXITSTATUS (r) == 0) {
 476                                 r = system (string ("konqueror " + film->directory().string()).c_str ());
 477                                 if (WEXITSTATUS (r)) {
 478                                         error_dialog (this, _("Could not show DCP (could not run konqueror)"));
 479                                 }
 480                         }
 481                 }
 482 #endif
 483         }
 484
 485         void tools_hints ()
 486         {
 487                 if (!_hints_dialog) {
 488                         _hints_dialog = new HintsDialog (this, film);
 489                 }
 490
 491                 _hints_dialog->Show ();
 492         }
 493
 494         void tools_encoding_servers ()
 495         {
 496                 if (!_servers_list_dialog) {
 497                         _servers_list_dialog = new ServersListDialog (this);
 498                 }
 499
 500                 _servers_list_dialog->Show ();
 501         }
 502
 503         void help_about ()
 504         {
 505                 AboutDialog* d = new AboutDialog (this);
 506                 d->ShowModal ();
 507                 d->Destroy ();
 508         }
 509
 510         bool should_close ()
 511         {
 512                 if (!JobManager::instance()->work_to_do ()) {
 513                         return true;
 514                 }
 515
 516                 wxMessageDialog* d = new wxMessageDialog (
 517                         0,
 518                         _("There are unfinished jobs; are you sure you want to quit?"),
 519                         _("Unfinished jobs"),
 520                         wxYES_NO | wxYES_DEFAULT | wxICON_QUESTION
 521                         );
 522
 523                 bool const r = d->ShowModal() == wxID_YES;
 524                 d->Destroy ();
 525                 return r;
 526         }
 527
 528         void close (wxCloseEvent& ev)
 529         {
 530                 if (!should_close ()) {
 531                         ev.Veto ();
 532                         return;
 533                 }
 534
 535                 ev.Skip ();
 536         }
 537
 538         HintsDialog* _hints_dialog;
 539         ServersListDialog* _servers_list_dialog;
 540 };
 541
 542 static const wxCmdLineEntryDesc command_line_description[] = {
 543         { wxCMD_LINE_OPTION, "l", "log", "set log level (silent, verbose or timing)", wxCMD_LINE_VAL_STRING, wxCMD_LINE_PARAM_OPTIONAL },
 544         { wxCMD_LINE_SWITCH, "n", "new", "create new film", wxCMD_LINE_VAL_NONE, wxCMD_LINE_PARAM_OPTIONAL },
 545         { wxCMD_LINE_PARAM, 0, 0, "film to load or create", wxCMD_LINE_VAL_STRING, wxCMD_LINE_PARAM_MULTIPLE | wxCMD_LINE_PARAM_OPTIONAL },
 546         { wxCMD_LINE_NONE, "", "", "", wxCmdLineParamType (0), 0 }
 547 };
 548
 549 class App : public wxApp
 550 {
 551         bool OnInit ()
 552         try
 553         {
 554                 SetAppName (_("DCP-o-matic"));
 555
 556                 if (!wxApp::OnInit()) {
 557                         return false;
 558                 }
 559
 560 #ifdef DCPOMATIC_LINUX
 561                 unsetenv ("UBUNTU_MENUPROXY");
 562 #endif
 563
 564 #ifdef __WXOSX__
 565                 ProcessSerialNumber serial;
 566                 GetCurrentProcess (&serial);
 567                 TransformProcessType (&serial, kProcessTransformToForegroundApplication);
 568 #endif
 569
 570                 wxInitAllImageHandlers ();
 571
 572                 /* Enable i18n; this will create a Config object
 573                    to look for a force-configured language.  This Config
 574                    object will be wrong, however, because dcpomatic_setup
 575                    hasn't yet been called and there aren't any scalers, filters etc.
 576                    set up yet.
 577                 */
 578                 dcpomatic_setup_i18n ();
 579
 580                 /* Set things up, including scalers / filters etc.
 581                    which will now be internationalised correctly.
 582                 */
 583                 dcpomatic_setup ();
 584
 585                 /* Force the configuration to be re-loaded correctly next
 586                    time it is needed.
 587                 */
 588                 Config::drop ();
 589
 590                 if (!film_to_load.empty() && boost::filesystem::is_directory (film_to_load)) {
 591                         try {
 592                                 film.reset (new Film (film_to_load));
 593                                 film->read_metadata ();
 594                                 film->log()->set_level (log_level);
 595                         } catch (exception& e) {
 596                                 error_dialog (0, std_to_wx (String::compose (wx_to_std (_("Could not load film %1 (%2)")), film_to_load, e.what())));
 597                         }
 598                 }
 599
 600                 if (!film_to_create.empty ()) {
 601                         film.reset (new Film (film_to_create));
 602                         film->write_metadata ();
 603                         film->log()->set_level (log_level);
 604                         film->set_name (boost::filesystem::path (film_to_create).filename().generic_string ());
 605                 }
 606
 607                 Frame* f = new Frame (_("DCP-o-matic"));
 608                 SetTopWindow (f);
 609                 f->Maximize ();
 610                 f->Show ();
 611
 612                 ui_signaller = new wxUISignaller (this);
 613                 this->Bind (wxEVT_IDLE, boost::bind (&App::idle, this));
 614
 615                 return true;
 616         }
 617         catch (exception& e)
 618         {
 619                 error_dialog (0, wxString::Format ("DCP-o-matic could not start: %s", e.what ()));
 620                 return true;
 621         }
 622
 623         void OnInitCmdLine (wxCmdLineParser& parser)
 624         {
 625                 parser.SetDesc (command_line_description);
 626                 parser.SetSwitchChars (wxT ("-"));
 627         }
 628
 629         bool OnCmdLineParsed (wxCmdLineParser& parser)
 630         {
 631                 if (parser.GetParamCount() > 0) {
 632                         if (parser.Found (wxT ("new"))) {
 633                                 film_to_create = wx_to_std (parser.GetParam (0));
 634                         } else {
 635                                 film_to_load = wx_to_std (parser.GetParam(0));
 636                         }
 637                 }
 638
 639                 wxString log;
 640                 if (parser.Found (wxT ("log"), &log)) {
 641                         log_level = wx_to_std (log);
 642                 }
 643
 644                 return true;
 645         }
 646
 647         void idle ()
 648         {
 649                 ui_signaller->ui_idle ();
 650         }
 651 };
 652
 653 IMPLEMENT_APP (App)