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 #endif
  31
  32 #include "wx/app.h"
  33 #include "wx/fontutil.h"
  34 #include "wx/univ/theme.h"
  35 #include "wx/univ/renderer.h"
  36 #include "wx/univ/colschem.h"
  37 #include "wx/mgl/private.h"
  38
  39 #define MGL_DEBUG
  40
  41 #if defined(MGL_DEBUG) && !defined(__WXDEBUG__)
  42 #undef MGL_DEBUG
  43 #endif
  44
  45 //-----------------------------------------------------------------------------
  46 // Global data
  47 //-----------------------------------------------------------------------------
  48
  49 wxApp *wxTheApp = NULL;
  50 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
  51
  52
  53 //-----------------------------------------------------------------------------
  54 // wxExit
  55 //-----------------------------------------------------------------------------
  56
  57 void wxExit()
  58 {
  59     MGL_exit();
  60     exit(0);
  61 }
  62
  63 //-----------------------------------------------------------------------------
  64 // wxYield
  65 //-----------------------------------------------------------------------------
  66
  67 static bool gs_inYield = FALSE;
  68
  69 bool wxApp::Yield(bool onlyIfNeeded)
  70 {
  71     if ( gs_inYield )
  72     {
  73         if ( !onlyIfNeeded )
  74         {
  75             wxFAIL_MSG( wxT("wxYield called recursively" ) );
  76         }
  77
  78         return FALSE;
  79     }
  80
  81 #if wxUSE_THREADS
  82     if ( !wxThread::IsMain() )
  83     {
  84         // can't process events from other threads, MGL is thread-unsafe
  85         return TRUE;
  86     }
  87 #endif // wxUSE_THREADS
  88
  89     gs_inYield = TRUE;
  90
  91     wxLog::Suspend();
  92
  93     if ( wxEventLoop::GetActive() )
  94     {
  95         while (wxEventLoop::GetActive()->Pending())
  96             wxEventLoop::GetActive()->Dispatch();
  97     }
  98
  99     /* it's necessary to call ProcessIdle() to update the frames sizes which
 100        might have been changed (it also will update other things set from
 101        OnUpdateUI() which is a nice (and desired) side effect) */
 102     while (wxTheApp->ProcessIdle()) { }
 103
 104     wxLog::Resume();
 105
 106     gs_inYield = FALSE;
 107
 108     return TRUE;
 109 }
 110
 111
 112 //-----------------------------------------------------------------------------
 113 // wxWakeUpIdle
 114 //-----------------------------------------------------------------------------
 115
 116 void wxWakeUpIdle()
 117 {
 118 #if wxUSE_THREADS
 119     if (!wxThread::IsMain())
 120         wxMutexGuiEnter();
 121 #endif
 122
 123     while (wxTheApp->ProcessIdle()) {}
 124
 125 #if wxUSE_THREADS
 126     if (!wxThread::IsMain())
 127         wxMutexGuiLeave();
 128 #endif
 129 }
 130
 131 //-----------------------------------------------------------------------------
 132 // Root window
 133 //-----------------------------------------------------------------------------
 134
 135 class wxRootWindow : public wxWindow
 136 {
 137     public:
 138         wxRootWindow() : wxWindow(NULL, -1)
 139         {
 140             SetMGLwindow_t(MGL_wmGetRootWindow(g_winMng));
 141             SetBackgroundColour(wxTHEME_COLOUR(DESKTOP));
 142         }
 143         ~wxRootWindow()
 144         {
 145             // we don't want to delete MGL_WM's rootWnd
 146             m_wnd = NULL;
 147         }
 148
 149         virtual bool AcceptsFocus() { return FALSE; }
 150 };
 151
 152 static wxRootWindow *gs_rootWindow = NULL;
 153
 154 //-----------------------------------------------------------------------------
 155 // MGL initialization
 156 //-----------------------------------------------------------------------------
 157
 158 static bool wxCreateMGL_WM(const wxDisplayModeInfo& displayMode)
 159 {
 160     int mode;
 161     int refresh = MGL_DEFAULT_REFRESH;
 162
 163 #if wxUSE_SYSTEM_OPTIONS
 164     if ( wxSystemOptions::HasOption(wxT("mgl.screen-refresh") )
 165         refresh = wxSystemOptions::GetOptionInt(wxT("mgl.screen-refresh"));
 166 #endif
 167
 168     mode = MGL_findMode(displayMode.GetScreenSize().x,
 169                         displayMode.GetScreenSize().y,
 170                         displayMode.GetDepth());
 171     if ( mode == -1 )
 172     {
 173         wxLogError(_("Mode %ix%i-%i not available."),
 174                      displayMode.GetScreenSize().x,
 175                      displayMode.GetScreenSize().y,
 176                      displayMode.GetDepth());
 177         return FALSE;
 178     }
 179     g_displayDC = new MGLDisplayDC(mode, 1, refresh);
 180     if ( !g_displayDC->isValid() )
 181     {
 182         delete g_displayDC;
 183         g_displayDC = NULL;
 184         return FALSE;
 185     }
 186
 187     g_winMng = MGL_wmCreate(g_displayDC->getDC());
 188     if (!g_winMng)
 189         return FALSE;
 190
 191     return TRUE;
 192 }
 193
 194 static void wxDestroyMGL_WM()
 195 {
 196     if ( g_winMng )
 197     {
 198         MGL_wmDestroy(g_winMng);
 199         g_winMng = NULL;
 200     }
 201     if ( g_displayDC )
 202     {
 203         delete g_displayDC;
 204         g_displayDC = NULL;
 205     }
 206 }
 207
 208 //-----------------------------------------------------------------------------
 209 // wxApp
 210 //-----------------------------------------------------------------------------
 211
 212 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 213
 214 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 215     EVT_IDLE(wxApp::OnIdle)
 216 END_EVENT_TABLE()
 217
 218
 219 wxApp::wxApp() : m_mainLoop(NULL)
 220 {
 221 }
 222
 223 wxApp::~wxApp()
 224 {
 225 }
 226
 227 bool wxApp::SetDisplayMode(const wxDisplayModeInfo& mode)
 228 {
 229     if ( !mode.IsOk() )
 230     {
 231         return FALSE;
 232     }
 233     if ( g_displayDC != NULL )
 234     {
 235         // FIXME_MGL -- we currently don't allow to switch video mode
 236         // more than once. This can hopefully be changed...
 237         wxFAIL_MSG(wxT("Can't change display mode after intialization!"));
 238         return FALSE;
 239     }
 240
 241     if ( !wxCreateMGL_WM(mode) )
 242         return FALSE;
 243     gs_rootWindow = new wxRootWindow;
 244
 245     m_displayMode = mode;
 246
 247     return TRUE;
 248 }
 249
 250 bool wxApp::OnInitGui()
 251 {
 252     if ( !wxAppBase::OnInitGui() )
 253         return FALSE;
 254
 255 #ifdef MGL_DEBUG
 256     // That damn MGL redirects stdin and stdout to physical console
 257     FILE *file = fopen("stderr", "wt");
 258     wxLog::SetActiveTarget(new wxLogStderr(file));
 259 #endif
 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     // Send OnIdle events to all windows
 291     if ( SendIdleEvents() )
 292         event.RequestMore(TRUE);
 293
 294     s_inOnIdle = FALSE;
 295 }
 296
 297 bool wxApp::SendIdleEvents()
 298 {
 299     bool needMore = FALSE;
 300
 301     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 302     while (node)
 303     {
 304         wxWindow* win = node->GetData();
 305         if ( SendIdleEvents(win) )
 306             needMore = TRUE;
 307         node = node->GetNext();
 308     }
 309
 310     return needMore;
 311 }
 312
 313 bool wxApp::SendIdleEvents(wxWindow* win)
 314 {
 315     bool needMore = FALSE;
 316
 317     wxIdleEvent event;
 318     event.SetEventObject(win);
 319
 320     win->GetEventHandler()->ProcessEvent(event);
 321
 322     if ( event.MoreRequested() )
 323         needMore = TRUE;
 324
 325     wxNode* node = win->GetChildren().First();
 326     while (node)
 327     {
 328         wxWindow* win = (wxWindow*) node->Data();
 329         if ( SendIdleEvents(win) )
 330             needMore = TRUE;
 331
 332         node = node->Next();
 333     }
 334     return needMore;
 335 }
 336
 337 int wxApp::MainLoop()
 338 {
 339     int rt;
 340     m_mainLoop = new wxEventLoop;
 341
 342     rt = m_mainLoop->Run();
 343
 344     delete m_mainLoop;
 345     m_mainLoop = NULL;
 346     return rt;
 347 }
 348
 349 void wxApp::ExitMainLoop()
 350 {
 351     if ( m_mainLoop )
 352         m_mainLoop->Exit(0);
 353 }
 354
 355 bool wxApp::Initialized()
 356 {
 357     return (wxTopLevelWindows.GetCount() != 0);
 358 }
 359
 360 bool wxApp::Pending()
 361 {
 362     return wxEventLoop::GetActive()->Pending();
 363 }
 364
 365 void wxApp::Dispatch()
 366 {
 367     wxEventLoop::GetActive()->Dispatch();
 368 }
 369
 370 void wxApp::DeletePendingObjects()
 371 {
 372     wxNode *node = wxPendingDelete.First();
 373     while (node)
 374     {
 375         wxObject *obj = (wxObject *)node->Data();
 376
 377         delete obj;
 378
 379         if ( wxPendingDelete.Find(obj) )
 380             delete node;
 381
 382         node = wxPendingDelete.First();
 383     }
 384 }
 385
 386 bool wxApp::Initialize()
 387 {
 388     if ( MGL_init(".", NULL) == 0 )
 389         return FALSE;
 390
 391     wxBuffer = new wxChar[BUFSIZ + 512];
 392
 393     wxClassInfo::InitializeClasses();
 394
 395     wxSystemSettings::Init();
 396
 397 #if wxUSE_INTL
 398     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 399 #endif
 400
 401     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 402     // create a module for that as it's part of the core.
 403 #if wxUSE_THREADS
 404     wxPendingEvents = new wxList;
 405     wxPendingEventsLocker = new wxCriticalSection;
 406 #endif
 407
 408     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 409     wxTheColourDatabase->Initialize();
 410
 411     // Can't do this in wxModule, because fonts are needed by stock lists
 412     wxTheFontsManager = new wxFontsManager;
 413
 414     wxInitializeStockLists();
 415     wxInitializeStockObjects();
 416
 417 #if wxUSE_WX_RESOURCES
 418     wxInitializeResourceSystem();
 419 #endif
 420
 421     wxModule::RegisterModules();
 422     if (!wxModule::InitializeModules()) return FALSE;
 423
 424     return TRUE;
 425 }
 426
 427 wxIcon wxApp::GetStdIcon(int which) const
 428 {
 429     return wxTheme::Get()->GetRenderer()->GetStdIcon(which);
 430 }
 431
 432 void wxApp::CleanUp()
 433 {
 434     delete gs_rootWindow;
 435
 436 #if wxUSE_LOG
 437     // flush the logged messages if any
 438     wxLog *log = wxLog::GetActiveTarget();
 439     if (log != NULL && log->HasPendingMessages())
 440         log->Flush();
 441
 442     // continuing to use user defined log target is unsafe from now on because
 443     // some resources may be already unavailable, so replace it by something
 444     // more safe
 445     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 446     if ( oldlog )
 447         delete oldlog;
 448 #endif // wxUSE_LOG
 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             retValue = wxTheApp->OnExit();
 614         }
 615     }
 616
 617     wxEntryCleanup();
 618
 619     return retValue;
 620 }