src/msw/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.cpp
   3 // Purpose:     wxApp
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "app.h"
  22     #pragma implementation "appbase.h"
  23 #endif
  24
  25 // For compilers that support precompilation, includes "wx.h".
  26 #include "wx/wxprec.h"
  27
  28 #if defined(__BORLANDC__)
  29     #pragma hdrstop
  30 #endif
  31
  32 #ifndef WX_PRECOMP
  33     #include "wx/frame.h"
  34     #include "wx/app.h"
  35     #include "wx/utils.h"
  36     #include "wx/gdicmn.h"
  37     #include "wx/pen.h"
  38     #include "wx/brush.h"
  39     #include "wx/cursor.h"
  40     #include "wx/icon.h"
  41     #include "wx/palette.h"
  42     #include "wx/dc.h"
  43     #include "wx/dialog.h"
  44     #include "wx/msgdlg.h"
  45     #include "wx/intl.h"
  46     #include "wx/dynarray.h"
  47 #   include "wx/wxchar.h"
  48 #   include "wx/icon.h"
  49 #endif
  50
  51 #include "wx/log.h"
  52 #include "wx/module.h"
  53
  54 #include "wx/msw/private.h"
  55
  56 #if wxUSE_THREADS
  57     #include "wx/thread.h"
  58
  59     // define the array of MSG strutures
  60     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
  61
  62     #include "wx/arrimpl.cpp"
  63
  64     WX_DEFINE_OBJARRAY(wxMsgArray);
  65 #endif // wxUSE_THREADS
  66
  67 #if wxUSE_WX_RESOURCES
  68     #include "wx/resource.h"
  69 #endif
  70
  71 // OLE is used for drag-and-drop, clipboard, OLE Automation...
  72 #if defined(__GNUWIN32__) || defined(__SC__) || defined(__SALFORDC__)
  73     #undef wxUSE_OLE
  74
  75     #define  wxUSE_OLE 0
  76 #endif // broken compilers
  77
  78 #if wxUSE_OLE
  79     #include <ole2.h>
  80 #endif
  81
  82 #include <string.h>
  83 #include <ctype.h>
  84
  85 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__)
  86     #include <commctrl.h>
  87 #endif
  88
  89 #include "wx/msw/msvcrt.h"
  90
  91 // ---------------------------------------------------------------------------
  92 // global variables
  93 // ---------------------------------------------------------------------------
  94
  95 extern wxChar *wxBuffer;
  96 extern wxChar *wxOsVersion;
  97 extern wxList *wxWinHandleList;
  98 extern wxList WXDLLEXPORT wxPendingDelete;
  99 #if wxUSE_THREADS
 100 extern wxList *wxPendingEvents;
 101 extern wxCriticalSection *wxPendingEventsLocker;
 102 #endif
 103 extern void wxSetKeyboardHook(bool doIt);
 104 extern wxCursor *g_globalCursor;
 105
 106 HINSTANCE wxhInstance = 0;
 107 MSG s_currentMsg;
 108 wxApp *wxTheApp = NULL;
 109
 110 // FIXME why not const? and not static?
 111 wxChar wxFrameClassName[]         = _T("wxFrameClass");
 112 wxChar wxMDIFrameClassName[]      = _T("wxMDIFrameClass");
 113 wxChar wxMDIChildFrameClassName[] = _T("wxMDIChildFrameClass");
 114 wxChar wxPanelClassName[]         = _T("wxPanelClass");
 115 wxChar wxCanvasClassName[]        = _T("wxCanvasClass");
 116
 117 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 118 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 119 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 120
 121 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 122 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 123 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 124
 125 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 126
 127 LRESULT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 128
 129 #if defined(__WIN95__) && !defined(__TWIN32__)
 130     #define wxUSE_RICHEDIT 1
 131 #else
 132     #define wxUSE_RICHEDIT 0
 133 #endif
 134
 135 #if wxUSE_RICHEDIT
 136     static HINSTANCE gs_hRichEdit = (HINSTANCE) NULL;
 137 #endif
 138
 139 // ===========================================================================
 140 // implementation
 141 // ===========================================================================
 142
 143 // ---------------------------------------------------------------------------
 144 // wxApp
 145 // ---------------------------------------------------------------------------
 146
 147 #if !USE_SHARED_LIBRARY
 148     IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 149
 150     BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 151         EVT_IDLE(wxApp::OnIdle)
 152         EVT_END_SESSION(wxApp::OnEndSession)
 153         EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 154     END_EVENT_TABLE()
 155 #endif
 156
 157 //// Initialize
 158 bool wxApp::Initialize()
 159 {
 160     // Some people may wish to use this, but
 161     // probably it shouldn't be here by default.
 162 #ifdef __WXDEBUG__
 163     //    wxRedirectIOToConsole();
 164 #endif
 165
 166     wxBuffer = new wxChar[1500]; // FIXME
 167
 168     wxClassInfo::InitializeClasses();
 169
 170 #if wxUSE_RESOURCES
 171     wxGetResource(_T("wxWindows"), _T("OsVersion"), &wxOsVersion);
 172 #endif
 173
 174     // I'm annoyed ... I don't know where to put this and I don't want to
 175     // create a module for that as it's part of the core.
 176 #if wxUSE_THREADS
 177     wxPendingEvents = new wxList();
 178     wxPendingEventsLocker = new wxCriticalSection();
 179 #endif
 180
 181     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 182     wxTheColourDatabase->Initialize();
 183
 184     wxInitializeStockLists();
 185     wxInitializeStockObjects();
 186
 187 #if wxUSE_WX_RESOURCES
 188     wxInitializeResourceSystem();
 189 #endif
 190
 191     wxBitmap::InitStandardHandlers();
 192
 193 #if defined(__WIN95__)
 194     InitCommonControls();
 195
 196 #if wxUSE_RICHEDIT
 197     gs_hRichEdit = LoadLibrary(_T("RICHED32.DLL"));
 198
 199     if (gs_hRichEdit == (HINSTANCE) NULL)
 200     {
 201         wxLogError(_("Could not initialise Rich Edit DLL"));
 202     }
 203 #endif // wxUSE_RICHEDIT
 204
 205 #endif // __WIN95__
 206
 207 #if wxUSE_OLE
 208
 209 #ifdef __WIN16__
 210     // for OLE, enlarge message queue to be as large as possible
 211     int iMsg = 96;
 212     while (!SetMessageQueue(iMsg) && (iMsg -= 8))
 213         ;
 214 #endif // Win16
 215
 216     // we need to initialize OLE library
 217     if ( FAILED(::OleInitialize(NULL)) )
 218         wxLogError(_("Cannot initialize OLE"));
 219 #endif // wxUSE_OLE
 220
 221 #if wxUSE_CTL3D
 222     if (!Ctl3dRegister(wxhInstance))
 223         wxLogError(_T("Cannot register CTL3D"));
 224
 225     Ctl3dAutoSubclass(wxhInstance);
 226 #endif
 227
 228     g_globalCursor = new wxCursor;
 229
 230     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, _T("wxSTD_FRAME"));
 231     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, _T("wxSTD_MDIPARENTFRAME"));
 232     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, _T("wxSTD_MDICHILDFRAME"));
 233
 234     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, _T("wxDEFAULT_FRAME"));
 235     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, _T("wxDEFAULT_MDIPARENTFRAME"));
 236     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, _T("wxDEFAULT_MDICHILDFRAME"));
 237
 238     RegisterWindowClasses();
 239
 240     // Create the brush for disabling bitmap buttons
 241
 242     LOGBRUSH lb;
 243     lb.lbStyle = BS_PATTERN;
 244     lb.lbHatch = (int)LoadBitmap( wxhInstance, _T("wxDISABLE_BUTTON_BITMAP") );
 245     if ( lb.lbHatch )
 246     {
 247         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 248         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 249     }
 250     //else: wxWindows resources are probably not linked in
 251
 252 #if wxUSE_PENWINDOWS
 253     wxRegisterPenWin();
 254 #endif
 255
 256     wxWinHandleList = new wxList(wxKEY_INTEGER);
 257
 258     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 259     // PLEASE DO NOT ALTER THIS.
 260 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 261     extern char wxDummyChar;
 262     if (wxDummyChar) wxDummyChar++;
 263 #endif
 264
 265     wxSetKeyboardHook(TRUE);
 266
 267     wxModule::RegisterModules();
 268     if (!wxModule::InitializeModules())
 269         return FALSE;
 270     return TRUE;
 271 }
 272
 273 // ---------------------------------------------------------------------------
 274 // RegisterWindowClasses
 275 // ---------------------------------------------------------------------------
 276
 277 bool wxApp::RegisterWindowClasses()
 278 {
 279     WNDCLASS wndclass;
 280
 281     // the fields which are common to all classes
 282     wndclass.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 283     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 284     wndclass.cbClsExtra    = 0;
 285     wndclass.cbWndExtra    = sizeof( DWORD ); // what is this DWORD used for?
 286     wndclass.hInstance     = wxhInstance;
 287     wndclass.hIcon         = (HICON) NULL;
 288     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 289     wndclass.lpszMenuName  = NULL;
 290
 291     // Register the frame window class.
 292     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 293 #ifdef _MULTIPLE_INSTANCES
 294     sprintf( wxFrameClassName,"wxFrameClass%d", wxhInstance );
 295 #endif
 296     wndclass.lpszClassName = wxFrameClassName;
 297
 298     if ( !RegisterClass(&wndclass) )
 299     {
 300         wxLogLastError("RegisterClass(frame)");
 301
 302         return FALSE;
 303     }
 304
 305     // Register the MDI frame window class.
 306     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 307     wndclass.lpszClassName = wxMDIFrameClassName;
 308
 309     if ( !RegisterClass(&wndclass) )
 310     {
 311         wxLogLastError("RegisterClass(MDI parent)");
 312
 313         return FALSE;
 314     }
 315
 316     // Register the MDI child frame window class.
 317     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 318     wndclass.lpszClassName = wxMDIChildFrameClassName;
 319
 320     if ( !RegisterClass(&wndclass) )
 321     {
 322         wxLogLastError("RegisterClass(MDI child)");
 323
 324         return FALSE;
 325     }
 326
 327     // Register the panel window class.
 328     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 329     wndclass.lpszClassName = wxPanelClassName;
 330
 331     if ( !RegisterClass(&wndclass) )
 332     {
 333         wxLogLastError("RegisterClass(panel)");
 334
 335         return FALSE;
 336     }
 337
 338     // Register the canvas and textsubwindow class name
 339     wndclass.hbrBackground = (HBRUSH)NULL;
 340     wndclass.lpszClassName = wxCanvasClassName;
 341
 342     if ( !RegisterClass(&wndclass) )
 343     {
 344         wxLogLastError("RegisterClass(canvas)");
 345
 346         return FALSE;
 347     }
 348
 349     return TRUE;
 350 }
 351
 352 // ---------------------------------------------------------------------------
 353 // Convert Windows to argc, argv style
 354 // ---------------------------------------------------------------------------
 355
 356 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 357 {
 358     wxStringList args;
 359
 360     wxString cmdLine(lpCmdLine);
 361     int count = 0;
 362
 363     // Get application name
 364     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 365     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 366
 367     args.Add(name);
 368     count++;
 369
 370     wxStrcpy(name, wxFileNameFromPath(name));
 371     wxStripExtension(name);
 372     wxTheApp->SetAppName(name);
 373
 374     // Break up string
 375     // Treat strings enclosed in double-quotes as single arguments
 376     int i = 0;
 377     int len = cmdLine.Length();
 378     while (i < len)
 379     {
 380         // Skip whitespace
 381         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 382             i ++;
 383
 384         if (i < len)
 385         {
 386             if (cmdLine.GetChar(i) == _T('"')) // We found the start of a string
 387             {
 388                 i ++;
 389                 int first = i;
 390                 while ((i < len) && (cmdLine.GetChar(i) != _T('"')))
 391                     i ++;
 392
 393                 wxString arg(cmdLine.Mid(first, (i - first)));
 394
 395                 args.Add(arg);
 396                 count ++;
 397
 398                 if (i < len)
 399                     i ++; // Skip past 2nd quote
 400             }
 401             else // Unquoted argument
 402             {
 403                 int first = i;
 404                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 405                     i ++;
 406
 407                 wxString arg(cmdLine.Mid(first, (i - first)));
 408
 409                 args.Add(arg);
 410                 count ++;
 411             }
 412         }
 413     }
 414
 415     wxTheApp->argv = new wxChar*[count + 1];
 416     for (i = 0; i < count; i++)
 417     {
 418         wxString arg(args[i]);
 419         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 420     }
 421     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 422     wxTheApp->argc = count;
 423 }
 424
 425 //// Cleans up any wxWindows internal structures left lying around
 426
 427 void wxApp::CleanUp()
 428 {
 429     //// COMMON CLEANUP
 430
 431 #if wxUSE_LOG
 432     // flush the logged messages if any and install a 'safer' log target: the
 433     // default one (wxLogGui) can't be used after the resources are freed just
 434     // below and the user suppliedo ne might be even more unsafe (using any
 435     // wxWindows GUI function is unsafe starting from now)
 436     wxLog::DontCreateOnDemand();
 437
 438     // this will flush the old messages if any
 439     delete wxLog::SetActiveTarget(new wxLogStderr);
 440 #endif // wxUSE_LOG
 441
 442     // One last chance for pending objects to be cleaned up
 443     wxTheApp->DeletePendingObjects();
 444
 445     wxModule::CleanUpModules();
 446
 447 #if wxUSE_WX_RESOURCES
 448     wxCleanUpResourceSystem();
 449
 450     //  wxDefaultResourceTable->ClearTable();
 451 #endif
 452
 453     // Indicate that the cursor can be freed, so that cursor won't be deleted
 454     // by deleting the bitmap list before g_globalCursor goes out of scope
 455     // (double deletion of the cursor).
 456     wxSetCursor(wxNullCursor);
 457     delete g_globalCursor;
 458     g_globalCursor = NULL;
 459
 460     wxDeleteStockObjects();
 461
 462     // Destroy all GDI lists, etc.
 463     wxDeleteStockLists();
 464
 465     delete wxTheColourDatabase;
 466     wxTheColourDatabase = NULL;
 467
 468     wxBitmap::CleanUpHandlers();
 469
 470     delete[] wxBuffer;
 471     wxBuffer = NULL;
 472
 473     //// WINDOWS-SPECIFIC CLEANUP
 474
 475     wxSetKeyboardHook(FALSE);
 476
 477 #ifdef __WIN95__
 478
 479 #if wxUSE_RICHEDIT
 480     if (gs_hRichEdit != (HINSTANCE) NULL)
 481         FreeLibrary(gs_hRichEdit);
 482 #endif
 483
 484 #endif
 485
 486 #if wxUSE_PENWINDOWS
 487     wxCleanUpPenWin();
 488 #endif
 489
 490     if (wxSTD_FRAME_ICON)
 491         DestroyIcon(wxSTD_FRAME_ICON);
 492     if (wxSTD_MDICHILDFRAME_ICON)
 493         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 494     if (wxSTD_MDIPARENTFRAME_ICON)
 495         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 496
 497     if (wxDEFAULT_FRAME_ICON)
 498         DestroyIcon(wxDEFAULT_FRAME_ICON);
 499     if (wxDEFAULT_MDICHILDFRAME_ICON)
 500         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 501     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 502         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 503
 504     if ( wxDisableButtonBrush )
 505         ::DeleteObject( wxDisableButtonBrush );
 506
 507 #if wxUSE_OLE
 508     ::OleUninitialize();
 509 #endif
 510
 511 #if wxUSE_CTL3D
 512     Ctl3dUnregister(wxhInstance);
 513 #endif
 514
 515     if (wxWinHandleList)
 516         delete wxWinHandleList;
 517
 518     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 519     // create a module for that as it's part of the core.
 520 #if wxUSE_THREADS
 521     delete wxPendingEvents;
 522     delete wxPendingEventsLocker;
 523     // If we don't do the following, we get an apparent memory leak.
 524     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 525 #endif
 526
 527     wxClassInfo::CleanUpClasses();
 528
 529     delete wxTheApp;
 530     wxTheApp = NULL;
 531
 532 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 533     // At this point we want to check if there are any memory
 534     // blocks that aren't part of the wxDebugContext itself,
 535     // as a special case. Then when dumping we need to ignore
 536     // wxDebugContext, too.
 537     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 538     {
 539         wxLogDebug(_T("There were memory leaks."));
 540         wxDebugContext::Dump();
 541         wxDebugContext::PrintStatistics();
 542     }
 543     //  wxDebugContext::SetStream(NULL, NULL);
 544 #endif
 545
 546 #if wxUSE_LOG
 547     // do it as the very last thing because everything else can log messages
 548     delete wxLog::SetActiveTarget(NULL);
 549 #endif // wxUSE_LOG
 550 }
 551
 552 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 553
 554 // temporarily disable this warning which would be generated in release builds
 555 // because of __try
 556 #ifdef __VISUALC__
 557     #pragma warning(disable: 4715) // not all control paths return a value
 558 #endif // Visual C++
 559
 560 //// Main wxWindows entry point
 561 int wxEntry(WXHINSTANCE hInstance,
 562             WXHINSTANCE WXUNUSED(hPrevInstance),
 563             char *lpCmdLine,
 564             int nCmdShow,
 565             bool enterLoop)
 566 {
 567     // do check for memory leaks on program exit
 568     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 569     //  deallocated memory which may be used to simulate low-memory condition)
 570     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 571
 572     // take everything into a try-except block in release build
 573     // FIXME other compilers must support Win32 SEH (structured exception
 574     //       handling) too, just find the appropriate keyword in their docs!
 575     //       Please note that it's _not_ the same as C++ exceptions!
 576 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 577     #define CATCH_PROGRAM_EXCEPTIONS
 578
 579     __try {
 580 #else
 581     #undef  CATCH_PROGRAM_EXCEPTIONS
 582 #endif
 583
 584         wxhInstance = (HINSTANCE) hInstance;
 585
 586         if (!wxApp::Initialize())
 587             return 0;
 588
 589         // create the application object or ensure that one already exists
 590         if (!wxTheApp)
 591         {
 592             // The app may have declared a global application object, but we recommend
 593             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 594             // function for delayed, dynamic app object construction.
 595             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 596                          _T("No initializer - use IMPLEMENT_APP macro.") );
 597
 598             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 599         }
 600
 601         wxCHECK_MSG( wxTheApp, 0, _T("You have to define an instance of wxApp!") );
 602
 603         // save the WinMain() parameters
 604         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 605         wxTheApp->m_nCmdShow = nCmdShow;
 606
 607         // GUI-specific initialisation. In fact on Windows we don't have any,
 608         // but this call is provided for compatibility across platforms.
 609         wxTheApp->OnInitGui();
 610
 611         int retValue = 0;
 612
 613         if ( wxTheApp->OnInit() )
 614         {
 615             if ( enterLoop )
 616             {
 617                 retValue = wxTheApp->OnRun();
 618             }
 619             else
 620                 // We want to initialize, but not run or exit immediately.
 621                 return 1;
 622         }
 623         //else: app initialization failed, so we skipped OnRun()
 624
 625         wxWindow *topWindow = wxTheApp->GetTopWindow();
 626         if ( topWindow )
 627         {
 628             // Forcibly delete the window.
 629             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 630                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 631             {
 632                 topWindow->Close(TRUE);
 633                 wxTheApp->DeletePendingObjects();
 634             }
 635             else
 636             {
 637                 delete topWindow;
 638                 wxTheApp->SetTopWindow(NULL);
 639             }
 640         }
 641
 642         wxTheApp->OnExit();
 643
 644         wxApp::CleanUp();
 645
 646         return retValue;
 647
 648 #ifdef CATCH_PROGRAM_EXCEPTIONS
 649     }
 650     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 651         /*
 652            if ( wxTheApp )
 653            wxTheApp->OnFatalException();
 654          */
 655
 656         // using wxLog would be unsafe here
 657         ::MessageBox(NULL,
 658                      _("Unrecoverable program error detected: "
 659                      " the application will terminate."),
 660                      _("Fatal Error"),
 661                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 662
 663         ::ExitProcess(3); // the same exit code as abort()
 664
 665         // NOTREACHED
 666     }
 667 #endif // CATCH_PROGRAM_EXCEPTIONS
 668 }
 669
 670 // restore warning state
 671 #ifdef __VISUALC__
 672     #pragma warning(default: 4715) // not all control paths return a value
 673 #endif // Visual C++
 674
 675 #else /*  _WINDLL  */
 676
 677 //// Entry point for DLLs
 678
 679 int wxEntry(WXHINSTANCE hInstance)
 680 {
 681     wxhInstance = (HINSTANCE) hInstance;
 682     wxApp::Initialize();
 683
 684     // The app may have declared a global application object, but we recommend
 685     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 686     // for delayed, dynamic app object construction.
 687     if (!wxTheApp)
 688     {
 689         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 690                      "No initializer - use IMPLEMENT_APP macro." );
 691
 692         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 693     }
 694
 695     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 696
 697     wxTheApp->argc = 0;
 698     wxTheApp->argv = NULL;
 699
 700     wxTheApp->OnInitGui();
 701
 702     wxTheApp->OnInit();
 703
 704     wxWindow *topWindow = wxTheApp->GetTopWindow();
 705     if ( topWindow && topWindow->GetHWND())
 706     {
 707         topWindow->Show(TRUE);
 708     }
 709
 710     return 1;
 711 }
 712 #endif // _WINDLL
 713
 714 //// Static member initialization
 715
 716 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 717
 718 wxApp::wxApp()
 719 {
 720     m_topWindow = NULL;
 721     wxTheApp = this;
 722     m_wantDebugOutput = TRUE;
 723
 724     argc = 0;
 725     argv = NULL;
 726     m_printMode = wxPRINT_WINDOWS;
 727     m_exitOnFrameDelete = TRUE;
 728     m_auto3D = TRUE;
 729 }
 730
 731 wxApp::~wxApp()
 732 {
 733     // Delete command-line args
 734     int i;
 735     for (i = 0; i < argc; i++)
 736     {
 737         delete[] argv[i];
 738     }
 739     delete[] argv;
 740 }
 741
 742 bool wxApp::Initialized()
 743 {
 744 #ifndef _WINDLL
 745     if (GetTopWindow())
 746         return TRUE;
 747     else
 748         return FALSE;
 749 #endif
 750 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 751     return TRUE;
 752 #endif
 753 }
 754
 755 /*
 756  * Get and process a message, returning FALSE if WM_QUIT
 757  * received (and also set the flag telling the app to exit the main loop)
 758  *
 759  */
 760 bool wxApp::DoMessage()
 761 {
 762     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 763     if ( rc == 0 )
 764     {
 765         // got WM_QUIT
 766         m_keepGoing = FALSE;
 767
 768         return FALSE;
 769     }
 770     else if ( rc == -1 )
 771     {
 772         // should never happen, but let's test for it nevertheless
 773         wxLogLastError("GetMessage");
 774     }
 775     else
 776     {
 777 #if wxUSE_THREADS
 778         wxASSERT_MSG( wxThread::IsMain(),
 779                       _T("only the main thread can process Windows messages") );
 780
 781         static bool s_hadGuiLock = TRUE;
 782         static wxMsgArray s_aSavedMessages;
 783
 784         // if a secondary thread owns is doing GUI calls, save all messages for
 785         // later processing - we can't process them right now because it will
 786         // lead to recursive library calls (and we're not reentrant)
 787         if ( !wxGuiOwnedByMainThread() )
 788         {
 789             s_hadGuiLock = FALSE;
 790
 791             // leave out WM_COMMAND messages: too dangerous, sometimes
 792             // the message will be processed twice
 793             if ( !wxIsWaitingForThread() ||
 794                     s_currentMsg.message != WM_COMMAND )
 795             {
 796                 s_aSavedMessages.Add(s_currentMsg);
 797             }
 798
 799             return TRUE;
 800         }
 801         else
 802         {
 803             // have we just regained the GUI lock? if so, post all of the saved
 804             // messages
 805             //
 806             // FIXME of course, it's not _exactly_ the same as processing the
 807             //       messages normally - expect some things to break...
 808             if ( !s_hadGuiLock )
 809             {
 810                 s_hadGuiLock = TRUE;
 811
 812                 size_t count = s_aSavedMessages.Count();
 813                 for ( size_t n = 0; n < count; n++ )
 814                 {
 815                     MSG& msg = s_aSavedMessages[n];
 816
 817                     if ( !ProcessMessage((WXMSG *)&msg) )
 818                     {
 819                         ::TranslateMessage(&msg);
 820                         ::DispatchMessage(&msg);
 821                     }
 822                 }
 823
 824                 s_aSavedMessages.Empty();
 825             }
 826         }
 827 #endif // wxUSE_THREADS
 828
 829         // Process the message
 830         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 831         {
 832             ::TranslateMessage(&s_currentMsg);
 833             ::DispatchMessage(&s_currentMsg);
 834         }
 835     }
 836
 837     return TRUE;
 838 }
 839
 840 /*
 841  * Keep trying to process messages until WM_QUIT
 842  * received.
 843  *
 844  * If there are messages to be processed, they will all be
 845  * processed and OnIdle will not be called.
 846  * When there are no more messages, OnIdle is called.
 847  * If OnIdle requests more time,
 848  * it will be repeatedly called so long as there are no pending messages.
 849  * A 'feature' of this is that once OnIdle has decided that no more processing
 850  * is required, then it won't get processing time until further messages
 851  * are processed (it'll sit in DoMessage).
 852  */
 853
 854 int wxApp::MainLoop()
 855 {
 856     m_keepGoing = TRUE;
 857
 858     while ( m_keepGoing )
 859     {
 860 #if wxUSE_THREADS
 861         wxMutexGuiLeaveOrEnter();
 862 #endif // wxUSE_THREADS
 863
 864         while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 865                 ProcessIdle() )
 866         {
 867         }
 868
 869
 870         DoMessage();
 871     }
 872
 873     return s_currentMsg.wParam;
 874 }
 875
 876 // Returns TRUE if more time is needed.
 877 bool wxApp::ProcessIdle()
 878 {
 879     wxIdleEvent event;
 880     event.SetEventObject(this);
 881     ProcessEvent(event);
 882
 883     return event.MoreRequested();
 884 }
 885
 886 #if wxUSE_THREADS
 887 void wxApp::ProcessPendingEvents()
 888 {
 889     wxNode *node = wxPendingEvents->First();
 890     wxCriticalSectionLocker locker(*wxPendingEventsLocker);
 891
 892     while (node)
 893     {
 894         wxEvtHandler *handler = (wxEvtHandler *)node->Data();
 895
 896         handler->ProcessPendingEvents();
 897
 898         delete node;
 899         node = wxPendingEvents->First();
 900     }
 901 }
 902 #endif
 903
 904
 905 void wxApp::ExitMainLoop()
 906 {
 907     m_keepGoing = FALSE;
 908 }
 909
 910 bool wxApp::Pending()
 911 {
 912     return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0);
 913 }
 914
 915 void wxApp::Dispatch()
 916 {
 917     DoMessage();
 918 }
 919
 920 /*
 921  * Give all windows a chance to preprocess
 922  * the message. Some may have accelerator tables, or have
 923  * MDI complications.
 924  */
 925
 926 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 927 {
 928     MSG *msg = (MSG *)wxmsg;
 929     HWND hWnd = msg->hwnd;
 930     wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
 931
 932     // for some composite controls (like a combobox), wndThis might be NULL
 933     // because the subcontrol is not a wxWindow, but only the control itself
 934     // is - try to catch this case
 935     while ( hWnd && !wndThis )
 936     {
 937         hWnd = ::GetParent(hWnd);
 938         wndThis = wxFindWinFromHandle((WXHWND)hWnd);
 939     }
 940
 941     // Try translations first; find the youngest window with
 942     // a translation table.
 943     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 944     {
 945         if ( wnd->MSWTranslateMessage(wxmsg) )
 946             return TRUE;
 947     }
 948
 949     // Anyone for a non-translation message? Try youngest descendants first.
 950     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 951     {
 952         if ( wnd->MSWProcessMessage(wxmsg) )
 953             return TRUE;
 954     }
 955
 956     return FALSE;
 957 }
 958
 959 void wxApp::OnIdle(wxIdleEvent& event)
 960 {
 961     static bool s_inOnIdle = FALSE;
 962
 963     // Avoid recursion (via ProcessEvent default case)
 964     if ( s_inOnIdle )
 965         return;
 966
 967     s_inOnIdle = TRUE;
 968
 969     // 'Garbage' collection of windows deleted with Close().
 970     DeletePendingObjects();
 971
 972 #if wxUSE_LOG
 973     // flush the logged messages if any
 974     wxLog *pLog = wxLog::GetActiveTarget();
 975     if ( pLog != NULL && pLog->HasPendingMessages() )
 976         pLog->Flush();
 977 #endif // wxUSE_LOG
 978
 979     // Send OnIdle events to all windows
 980     if ( SendIdleEvents() )
 981     {
 982         // SendIdleEvents() returns TRUE if at least one window requested more
 983         // idle events
 984         event.RequestMore(TRUE);
 985     }
 986
 987     // If they are pending events, we must process them.
 988 #if wxUSE_THREADS
 989     ProcessPendingEvents();
 990 #endif
 991     s_inOnIdle = FALSE;
 992 }
 993
 994 // Send idle event to all top-level windows
 995 bool wxApp::SendIdleEvents()
 996 {
 997     bool needMore = FALSE;
 998
 999     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1000     while (node)
1001     {
1002         wxWindow* win = node->GetData();
1003         if (SendIdleEvents(win))
1004             needMore = TRUE;
1005         node = node->GetNext();
1006     }
1007
1008     return needMore;
1009 }
1010
1011 // Send idle event to window and all subwindows
1012 bool wxApp::SendIdleEvents(wxWindow* win)
1013 {
1014     bool needMore = FALSE;
1015
1016     wxIdleEvent event;
1017     event.SetEventObject(win);
1018     win->GetEventHandler()->ProcessEvent(event);
1019
1020     if (event.MoreRequested())
1021         needMore = TRUE;
1022
1023     wxNode* node = win->GetChildren().First();
1024     while (node)
1025     {
1026         wxWindow* win = (wxWindow*) node->Data();
1027         if (SendIdleEvents(win))
1028             needMore = TRUE;
1029
1030         node = node->Next();
1031     }
1032     return needMore;
1033 }
1034
1035 void wxApp::DeletePendingObjects()
1036 {
1037     wxNode *node = wxPendingDelete.First();
1038     while (node)
1039     {
1040         wxObject *obj = (wxObject *)node->Data();
1041
1042         delete obj;
1043
1044         if (wxPendingDelete.Member(obj))
1045             delete node;
1046
1047         // Deleting one object may have deleted other pending
1048         // objects, so start from beginning of list again.
1049         node = wxPendingDelete.First();
1050     }
1051 }
1052
1053 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1054 {
1055     if (GetTopWindow())
1056         GetTopWindow()->Close(TRUE);
1057 }
1058
1059 // Default behaviour: close the application with prompts. The
1060 // user can veto the close, and therefore the end session.
1061 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1062 {
1063     if (GetTopWindow())
1064     {
1065         if (!GetTopWindow()->Close(!event.CanVeto()))
1066             event.Veto(TRUE);
1067     }
1068 }
1069
1070 int wxApp::GetComCtl32Version() const
1071 {
1072     // have we loaded COMCTL32 yet?
1073     HMODULE theModule = ::GetModuleHandle(_T("COMCTL32"));
1074     int version = 0;
1075
1076     // if so, then we can check for the version
1077     if (theModule)
1078     {
1079         // InitCommonControlsEx is unique to 4.7 and later
1080         FARPROC theProc = ::GetProcAddress(theModule, "InitCommonControlsEx");
1081
1082         if (! theProc)
1083         {                    // not found, must be 4.00
1084             version = 400;
1085         }
1086         else
1087         {
1088             // The following symbol are unique to 4.71
1089             //   DllInstall
1090             //   FlatSB_EnableScrollBar FlatSB_GetScrollInfo FlatSB_GetScrollPos
1091             //   FlatSB_GetScrollProp FlatSB_GetScrollRange FlatSB_SetScrollInfo
1092             //   FlatSB_SetScrollPos FlatSB_SetScrollProp FlatSB_SetScrollRange
1093             //   FlatSB_ShowScrollBar
1094             //   _DrawIndirectImageList _DuplicateImageList
1095             //   InitializeFlatSB
1096             //   UninitializeFlatSB
1097             // we could check for any of these - I chose DllInstall
1098             FARPROC theProc = ::GetProcAddress(theModule, "DllInstall");
1099             if (! theProc)
1100             {
1101                 // not found, must be 4.70
1102                 version = 470;
1103             }
1104             else
1105             {                         // found, must be 4.71
1106                 version = 471;
1107             }
1108         }
1109     }
1110     return version;
1111 }
1112
1113 void wxExit()
1114 {
1115     wxLogError(_("Fatal error: exiting"));
1116
1117     wxApp::CleanUp();
1118 }
1119
1120 // Yield to incoming messages
1121 bool wxYield()
1122 {
1123     MSG msg;
1124     // We want to go back to the main message loop
1125     // if we see a WM_QUIT. (?)
1126 #ifdef __WXWINE__
1127     while (PeekMessage(&msg, (HWND)NULL, 0, 0, PM_NOREMOVE) && msg.message != WM_QUIT)
1128 #else
1129     while (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) && msg.message != WM_QUIT)
1130 #endif
1131     {
1132         if ( !wxTheApp->DoMessage() )
1133             break;
1134     }
1135     // If they are pending events, we must process them.
1136 #if wxUSE_THREADS
1137     wxTheApp->ProcessPendingEvents();
1138 #endif
1139
1140     return TRUE;
1141 }
1142
1143 wxIcon
1144 wxApp::GetStdIcon(int which) const
1145 {
1146     switch(which)
1147     {
1148         case wxICON_INFORMATION:
1149             return wxIcon("wxICON_INFO");
1150
1151         case wxICON_QUESTION:
1152             return wxIcon("wxICON_QUESTION");
1153
1154         case wxICON_EXCLAMATION:
1155             return wxIcon("wxICON_WARNING");
1156
1157         default:
1158             wxFAIL_MSG(_T("requested non existent standard icon"));
1159             // still fall through
1160
1161         case wxICON_HAND:
1162             return wxIcon("wxICON_ERROR");
1163     }
1164 }
1165
1166
1167 HINSTANCE wxGetInstance()
1168 {
1169     return wxhInstance;
1170 }
1171
1172 void wxSetInstance(HINSTANCE hInst)
1173 {
1174     wxhInstance = hInst;
1175 }
1176
1177 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1178 // if in a separate file. So include it here to ensure it's linked.
1179 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
1180 #include "main.cpp"
1181 #endif