src/mgl/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.cpp
   3 // Author:      Vaclav Slavik
   4 //              based on GTK and MSW implementations
   5 // Id:          $Id$
   6 // Copyright:   (c) 2001 SciTech Software, Inc. (www.scitechsoft.com)
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11     #pragma implementation "app.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #ifdef __BORLANDC__
  18     #pragma hdrstop
  19 #endif
  20
  21
  22 #ifndef WX_PRECOMP
  23     #include "wx/settings.h"
  24     #include "wx/module.h"
  25     #include "wx/evtloop.h"
  26     #include "wx/frame.h"
  27     #include "wx/dialog.h"
  28     #include "wx/log.h"
  29     #include "wx/intl.h"
  30     #include "wx/resource.h"
  31 #endif
  32
  33 #include "wx/app.h"
  34 #include "wx/fontutil.h"
  35 #include "wx/univ/theme.h"
  36 #include "wx/univ/renderer.h"
  37 #include "wx/univ/colschem.h"
  38 #include "wx/sysopt.h"
  39 #include "wx/mgl/private.h"
  40
  41 //-----------------------------------------------------------------------------
  42 // Global data
  43 //-----------------------------------------------------------------------------
  44
  45 wxApp *wxTheApp = NULL;
  46 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
  47
  48
  49 //-----------------------------------------------------------------------------
  50 // wxExit
  51 //-----------------------------------------------------------------------------
  52
  53 void wxExit()
  54 {
  55     MGL_exit();
  56     exit(0);
  57 }
  58
  59 //-----------------------------------------------------------------------------
  60 // wxYield
  61 //-----------------------------------------------------------------------------
  62
  63 static bool gs_inYield = FALSE;
  64
  65 bool wxApp::Yield(bool onlyIfNeeded)
  66 {
  67     if ( gs_inYield )
  68     {
  69         if ( !onlyIfNeeded )
  70         {
  71             wxFAIL_MSG( wxT("wxYield called recursively" ) );
  72         }
  73
  74         return FALSE;
  75     }
  76
  77 #if wxUSE_THREADS
  78     if ( !wxThread::IsMain() )
  79     {
  80         // can't process events from other threads, MGL is thread-unsafe
  81         return TRUE;
  82     }
  83 #endif // wxUSE_THREADS
  84
  85     gs_inYield = TRUE;
  86
  87     wxLog::Suspend();
  88
  89     if ( wxEventLoop::GetActive() )
  90     {
  91         while (wxEventLoop::GetActive()->Pending())
  92             wxEventLoop::GetActive()->Dispatch();
  93     }
  94
  95     /* it's necessary to call ProcessIdle() to update the frames sizes which
  96        might have been changed (it also will update other things set from
  97        OnUpdateUI() which is a nice (and desired) side effect) */
  98     while (wxTheApp->ProcessIdle()) { }
  99
 100     wxLog::Resume();
 101
 102     gs_inYield = FALSE;
 103
 104     return TRUE;
 105 }
 106
 107
 108 //-----------------------------------------------------------------------------
 109 // wxWakeUpIdle
 110 //-----------------------------------------------------------------------------
 111
 112 void wxWakeUpIdle()
 113 {
 114 #if wxUSE_THREADS
 115     if (!wxThread::IsMain())
 116         wxMutexGuiEnter();
 117 #endif
 118
 119     while (wxTheApp->ProcessIdle()) {}
 120
 121 #if wxUSE_THREADS
 122     if (!wxThread::IsMain())
 123         wxMutexGuiLeave();
 124 #endif
 125 }
 126
 127 //-----------------------------------------------------------------------------
 128 // Root window
 129 //-----------------------------------------------------------------------------
 130
 131 class wxRootWindow : public wxWindow
 132 {
 133     public:
 134         wxRootWindow() : wxWindow(NULL, -1)
 135         {
 136             SetMGLwindow_t(MGL_wmGetRootWindow(g_winMng));
 137             SetBackgroundColour(wxTHEME_COLOUR(DESKTOP));
 138         }
 139         ~wxRootWindow()
 140         {
 141             // we don't want to delete MGL_WM's rootWnd
 142             m_wnd = NULL;
 143         }
 144
 145         virtual bool AcceptsFocus() { return FALSE; }
 146 };
 147
 148 static wxRootWindow *gs_rootWindow = NULL;
 149
 150 //-----------------------------------------------------------------------------
 151 // MGL initialization
 152 //-----------------------------------------------------------------------------
 153
 154 static bool wxCreateMGL_WM(const wxDisplayModeInfo& displayMode)
 155 {
 156     int mode;
 157     int refresh = MGL_DEFAULT_REFRESH;
 158
 159 #if wxUSE_SYSTEM_OPTIONS
 160     if ( wxSystemOptions::HasOption(wxT("mgl.screen-refresh")) )
 161         refresh = wxSystemOptions::GetOptionInt(wxT("mgl.screen-refresh"));
 162 #endif
 163
 164     mode = MGL_findMode(displayMode.GetWidth(),
 165                         displayMode.GetHeight(),
 166                         displayMode.GetDepth());
 167     if ( mode == -1 )
 168     {
 169         wxLogError(_("Mode %ix%i-%i not available."),
 170                      displayMode.GetWidth(),
 171                      displayMode.GetHeight(),
 172                      displayMode.GetDepth());
 173         return FALSE;
 174     }
 175     g_displayDC = new MGLDisplayDC(mode, 1, refresh);
 176     if ( !g_displayDC->isValid() )
 177     {
 178         delete g_displayDC;
 179         g_displayDC = NULL;
 180         return FALSE;
 181     }
 182
 183     g_winMng = MGL_wmCreate(g_displayDC->getDC());
 184     if (!g_winMng)
 185         return FALSE;
 186
 187     return TRUE;
 188 }
 189
 190 static void wxDestroyMGL_WM()
 191 {
 192     if ( g_winMng )
 193     {
 194         MGL_wmDestroy(g_winMng);
 195         g_winMng = NULL;
 196     }
 197     if ( g_displayDC )
 198     {
 199         delete g_displayDC;
 200         g_displayDC = NULL;
 201     }
 202 }
 203
 204 //-----------------------------------------------------------------------------
 205 // wxApp
 206 //-----------------------------------------------------------------------------
 207
 208 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 209
 210 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 211     EVT_IDLE(wxApp::OnIdle)
 212 END_EVENT_TABLE()
 213
 214
 215 wxApp::wxApp() : m_mainLoop(NULL)
 216 {
 217 }
 218
 219 wxApp::~wxApp()
 220 {
 221 }
 222
 223 bool wxApp::SetDisplayMode(const wxDisplayModeInfo& mode)
 224 {
 225     if ( !mode.IsOk() )
 226     {
 227         return FALSE;
 228     }
 229     if ( g_displayDC != NULL )
 230     {
 231         // FIXME_MGL -- we currently don't allow to switch video mode
 232         // more than once. This can hopefully be changed...
 233         wxFAIL_MSG(wxT("Can't change display mode after intialization!"));
 234         return FALSE;
 235     }
 236
 237     if ( !wxCreateMGL_WM(mode) )
 238         return FALSE;
 239     gs_rootWindow = new wxRootWindow;
 240
 241     m_displayMode = mode;
 242
 243     return TRUE;
 244 }
 245
 246 bool wxApp::OnInitGui()
 247 {
 248     if ( !wxAppBase::OnInitGui() )
 249         return FALSE;
 250
 251 #ifdef __WXDEBUG__
 252     // MGL redirects stdout and stderr to physical console, so lets redirect
 253     // it to file. Do it only when WXDEBUG environment variable is set
 254     if ( wxGetEnv(wxT("WXDEBUG"), NULL) )
 255         freopen("output.err", "wt", stderr);
 256 #endif
 257
 258     wxLog *oldLog = wxLog::SetActiveTarget(new wxLogGui);
 259     if ( oldLog ) delete oldLog;
 260
 261     return TRUE;
 262 }
 263
 264 bool wxApp::ProcessIdle()
 265 {
 266     wxIdleEvent event;
 267     event.SetEventObject(this);
 268     ProcessEvent(event);
 269
 270     return event.MoreRequested();
 271 }
 272
 273 void wxApp::OnIdle(wxIdleEvent &event)
 274 {
 275     static bool s_inOnIdle = FALSE;
 276
 277     /* Avoid recursion (via ProcessEvent default case) */
 278     if (s_inOnIdle)
 279         return;
 280
 281     s_inOnIdle = TRUE;
 282
 283     /* Resend in the main thread events which have been prepared in other
 284        threads */
 285     ProcessPendingEvents();
 286
 287     // 'Garbage' collection of windows deleted with Close().
 288     DeletePendingObjects();
 289
 290 #if wxUSE_LOG
 291     // flush the logged messages if any
 292     wxLog::FlushActive();
 293 #endif // wxUSE_LOG
 294
 295     // Send OnIdle events to all windows
 296     if ( SendIdleEvents() )
 297         event.RequestMore(TRUE);
 298
 299     s_inOnIdle = FALSE;
 300 }
 301
 302 bool wxApp::SendIdleEvents()
 303 {
 304     bool needMore = FALSE;
 305
 306     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 307     while (node)
 308     {
 309         wxWindow* win = node->GetData();
 310         if ( SendIdleEvents(win) )
 311             needMore = TRUE;
 312         node = node->GetNext();
 313     }
 314
 315     return needMore;
 316 }
 317
 318 bool wxApp::SendIdleEvents(wxWindow* win)
 319 {
 320     bool needMore = FALSE;
 321
 322     wxIdleEvent event;
 323     event.SetEventObject(win);
 324
 325     win->GetEventHandler()->ProcessEvent(event);
 326
 327     if ( event.MoreRequested() )
 328         needMore = TRUE;
 329
 330     wxNode* node = win->GetChildren().First();
 331     while (node)
 332     {
 333         wxWindow* win = (wxWindow*) node->Data();
 334         if ( SendIdleEvents(win) )
 335             needMore = TRUE;
 336
 337         node = node->Next();
 338     }
 339     return needMore;
 340 }
 341
 342 int wxApp::MainLoop()
 343 {
 344     int rt;
 345     m_mainLoop = new wxEventLoop;
 346
 347     rt = m_mainLoop->Run();
 348
 349     delete m_mainLoop;
 350     m_mainLoop = NULL;
 351     return rt;
 352 }
 353
 354 void wxApp::ExitMainLoop()
 355 {
 356     if ( m_mainLoop )
 357         m_mainLoop->Exit(0);
 358 }
 359
 360 bool wxApp::Initialized()
 361 {
 362     return (wxTopLevelWindows.GetCount() != 0);
 363 }
 364
 365 bool wxApp::Pending()
 366 {
 367     return wxEventLoop::GetActive()->Pending();
 368 }
 369
 370 void wxApp::Dispatch()
 371 {
 372     wxEventLoop::GetActive()->Dispatch();
 373 }
 374
 375 void wxApp::DeletePendingObjects()
 376 {
 377     wxNode *node = wxPendingDelete.First();
 378     while (node)
 379     {
 380         wxObject *obj = (wxObject *)node->Data();
 381
 382         delete obj;
 383
 384         if ( wxPendingDelete.Find(obj) )
 385             delete node;
 386
 387         node = wxPendingDelete.First();
 388     }
 389 }
 390
 391 bool wxApp::Initialize()
 392 {
 393     if ( MGL_init(".", NULL) == 0 )
 394         return FALSE;
 395
 396     wxBuffer = new wxChar[BUFSIZ + 512];
 397
 398     wxClassInfo::InitializeClasses();
 399
 400     wxSystemSettings::Init();
 401
 402 #if wxUSE_INTL
 403     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 404 #endif
 405
 406     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 407     // create a module for that as it's part of the core.
 408 #if wxUSE_THREADS
 409     wxPendingEvents = new wxList;
 410     wxPendingEventsLocker = new wxCriticalSection;
 411 #endif
 412
 413     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 414     wxTheColourDatabase->Initialize();
 415
 416     // Can't do this in wxModule, because fonts are needed by stock lists
 417     wxTheFontsManager = new wxFontsManager;
 418
 419     wxInitializeStockLists();
 420     wxInitializeStockObjects();
 421
 422 #if wxUSE_WX_RESOURCES
 423     wxInitializeResourceSystem();
 424 #endif
 425
 426     wxModule::RegisterModules();
 427     if (!wxModule::InitializeModules()) return FALSE;
 428
 429     return TRUE;
 430 }
 431
 432 wxIcon wxApp::GetStdIcon(int which) const
 433 {
 434     return wxTheme::Get()->GetRenderer()->GetStdIcon(which);
 435 }
 436
 437 void wxApp::CleanUp()
 438 {
 439 #if wxUSE_LOG
 440     // continuing to use user defined log target is unsafe from now on because
 441     // some resources may be already unavailable, so replace it by something
 442     // more safe
 443     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 444     if ( oldlog )
 445         delete oldlog;
 446 #endif // wxUSE_LOG
 447
 448     delete gs_rootWindow;
 449
 450     wxModule::CleanUpModules();
 451
 452 #if wxUSE_WX_RESOURCES
 453     wxCleanUpResourceSystem();
 454 #endif
 455
 456     if (wxTheColourDatabase)
 457         delete wxTheColourDatabase;
 458
 459     wxTheColourDatabase = (wxColourDatabase*) NULL;
 460
 461     wxDeleteStockObjects();
 462     wxDeleteStockLists();
 463
 464     // Can't do this in wxModule, because fonts are needed by stock lists
 465     delete wxTheFontsManager;
 466     wxTheFontsManager = (wxFontsManager*) NULL;
 467
 468     delete wxTheApp;
 469     wxTheApp = (wxApp*) NULL;
 470
 471     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 472     // create a module for that as it's part of the core.
 473 #if wxUSE_THREADS
 474     delete wxPendingEvents;
 475     delete wxPendingEventsLocker;
 476 #endif
 477
 478     wxSystemSettings::Done();
 479
 480     delete[] wxBuffer;
 481
 482     wxClassInfo::CleanUpClasses();
 483
 484     // check for memory leaks
 485 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 486     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 487     {
 488         wxLogDebug(wxT("There were memory leaks.\n"));
 489         wxDebugContext::Dump();
 490         wxDebugContext::PrintStatistics();
 491     }
 492 #endif // Debug
 493
 494 #if wxUSE_LOG
 495     // do this as the very last thing because everything else can log messages
 496     wxLog::DontCreateOnDemand();
 497
 498     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 499     if (oldLog)
 500         delete oldLog;
 501 #endif // wxUSE_LOG
 502
 503     wxDestroyMGL_WM();
 504     MGL_exit();
 505 }
 506
 507
 508 int wxEntryStart(int argc, char *argv[])
 509 {
 510     return wxApp::Initialize() ? 0 : -1;
 511 }
 512
 513
 514 int wxEntryInitGui()
 515 {
 516     return wxTheApp->OnInitGui() ? 0 : -1;
 517 }
 518
 519
 520 void wxEntryCleanup()
 521 {
 522     wxApp::CleanUp();
 523 }
 524
 525
 526
 527 int wxEntry(int argc, char *argv[])
 528 {
 529 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 530     // This seems to be necessary since there are 'rogue'
 531     // objects present at this point (perhaps global objects?)
 532     // Setting a checkpoint will ignore them as far as the
 533     // memory checking facility is concerned.
 534     // Of course you may argue that memory allocated in globals should be
 535     // checked, but this is a reasonable compromise.
 536     wxDebugContext::SetCheckpoint();
 537 #endif
 538     int err = wxEntryStart(argc, argv);
 539     if ( err )
 540         return err;
 541
 542     if ( !wxTheApp )
 543     {
 544         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 545                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 546
 547         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 548
 549         wxObject *test_app = app_ini();
 550
 551         wxTheApp = (wxApp*) test_app;
 552     }
 553
 554     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 555
 556     wxTheApp->argc = argc;
 557 #if wxUSE_UNICODE
 558     wxTheApp->argv = new wxChar*[argc+1];
 559     int mb_argc = 0;
 560     while (mb_argc < argc)
 561     {
 562         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 563         mb_argc++;
 564     }
 565     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 566 #else
 567     wxTheApp->argv = argv;
 568 #endif
 569
 570     wxString name(wxFileNameFromPath(argv[0]));
 571     wxStripExtension(name);
 572     wxTheApp->SetAppName(name);
 573
 574     int retValue;
 575     retValue = wxEntryInitGui();
 576
 577     // Here frames insert themselves automatically into wxTopLevelWindows by
 578     // getting created in OnInit().
 579     if ( retValue == 0 )
 580     {
 581         if ( !wxTheApp->OnInit() )
 582             retValue = -1;
 583     }
 584
 585     if ( retValue == 0 )
 586     {
 587         /* delete pending toplevel windows (typically a single
 588            dialog) so that, if there isn't any left, we don't
 589            call OnRun() */
 590         wxTheApp->DeletePendingObjects();
 591
 592         if ( wxTheApp->Initialized() )
 593         {
 594             wxTheApp->OnRun();
 595
 596             wxWindow *topWindow = wxTheApp->GetTopWindow();
 597             if ( topWindow )
 598             {
 599                 /* Forcibly delete the window. */
 600                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 601                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 602                 {
 603                     topWindow->Close(TRUE);
 604                     wxTheApp->DeletePendingObjects();
 605                 }
 606                 else
 607                 {
 608                     delete topWindow;
 609                     wxTheApp->SetTopWindow((wxWindow*) NULL);
 610                 }
 611             }
 612
 613 #if wxUSE_LOG
 614             // flush the logged messages if any
 615             wxLog *log = wxLog::GetActiveTarget();
 616             if (log != NULL && log->HasPendingMessages())
 617                 log->Flush();
 618 #endif // wxUSE_LOG
 619             retValue = wxTheApp->OnExit();
 620         }
 621     }
 622
 623     wxEntryCleanup();
 624
 625     return retValue;
 626 }