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
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "app.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #if defined(__BORLANDC__)
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/frame.h"
  33     #include "wx/app.h"
  34     #include "wx/utils.h"
  35     #include "wx/gdicmn.h"
  36     #include "wx/pen.h"
  37     #include "wx/brush.h"
  38     #include "wx/cursor.h"
  39     #include "wx/icon.h"
  40     #include "wx/palette.h"
  41     #include "wx/dc.h"
  42     #include "wx/dialog.h"
  43     #include "wx/msgdlg.h"
  44     #include "wx/intl.h"
  45     #include "wx/dynarray.h"
  46     #include "wx/wxchar.h"
  47     #include "wx/icon.h"
  48     #include "wx/log.h"
  49 #endif
  50
  51 #include "wx/cmdline.h"
  52 #include "wx/filename.h"
  53 #include "wx/module.h"
  54
  55 #include "wx/msw/private.h"
  56
  57 #if wxUSE_THREADS
  58     #include "wx/thread.h"
  59
  60     // define the array of MSG strutures
  61     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
  62
  63     #include "wx/arrimpl.cpp"
  64
  65     WX_DEFINE_OBJARRAY(wxMsgArray);
  66 #endif // wxUSE_THREADS
  67
  68 #if wxUSE_WX_RESOURCES
  69     #include "wx/resource.h"
  70 #endif
  71
  72 #if wxUSE_TOOLTIPS
  73     #include "wx/tooltip.h"
  74 #endif // wxUSE_TOOLTIPS
  75
  76 // OLE is used for drag-and-drop, clipboard, OLE Automation..., but some
  77 // compilers don't support it (missing headers, libs, ...)
  78 #if defined(__GNUWIN32_OLD__) || defined(__SC__) || defined(__SALFORDC__)
  79     #undef wxUSE_OLE
  80
  81     #define  wxUSE_OLE 0
  82 #endif // broken compilers
  83
  84 #if wxUSE_OLE
  85     #include <ole2.h>
  86 #endif
  87
  88 #include <string.h>
  89 #include <ctype.h>
  90
  91 #if defined(__WIN95__) && !((defined(__GNUWIN32_OLD__) || defined(__TWIN32__) || defined(__WXMICROWIN__)) && !defined(__CYGWIN10__))
  92     #include <commctrl.h>
  93 #endif
  94
  95 #ifndef __WXMICROWIN__
  96 #include "wx/msw/msvcrt.h"
  97 #endif
  98
  99 // ----------------------------------------------------------------------------
 100 // conditional compilation
 101 // ----------------------------------------------------------------------------
 102
 103 // The macro _WIN32_IE is defined by commctrl.h (unless it had already been
 104 // defined before) and shows us what common control features are available
 105 // during the compile time (it doesn't mean that they will be available during
 106 // the run-time, use GetComCtl32Version() to test for them!). The possible
 107 // values are:
 108 //
 109 // 0x0200     for comctl32.dll 4.00 shipped with Win95/NT 4.0
 110 // 0x0300                      4.70              IE 3.x
 111 // 0x0400                      4.71              IE 4.0
 112 // 0x0401                      4.72              IE 4.01 and Win98
 113 // 0x0500                      5.00              IE 5.x and NT 5.0 (Win2000)
 114
 115 #ifndef _WIN32_IE
 116     // minimal set of features by default
 117     #define _WIN32_IE 0x0200
 118 #endif
 119
 120 #if _WIN32_IE >= 0x0300 && \
 121     (!defined(__MINGW32__) || wxCHECK_W32API_VERSION( 2, 0 )) && \
 122     !defined(__CYGWIN__)
 123     #include <shlwapi.h>
 124 #endif
 125
 126 // ---------------------------------------------------------------------------
 127 // global variables
 128 // ---------------------------------------------------------------------------
 129
 130 extern wxChar *wxBuffer;
 131 extern wxList WXDLLEXPORT wxPendingDelete;
 132 #ifndef __WXMICROWIN__
 133 extern void wxSetKeyboardHook(bool doIt);
 134 #endif
 135
 136 MSG s_currentMsg;
 137 wxApp *wxTheApp = NULL;
 138
 139 // NB: all "NoRedraw" classes must have the same names as the "normal" classes
 140 //     with NR suffix - wxWindow::MSWCreate() supposes this
 141 const wxChar *wxCanvasClassName        = wxT("wxWindowClass");
 142 const wxChar *wxCanvasClassNameNR      = wxT("wxWindowClassNR");
 143 const wxChar *wxMDIFrameClassName      = wxT("wxMDIFrameClass");
 144 const wxChar *wxMDIFrameClassNameNoRedraw = wxT("wxMDIFrameClassNR");
 145 const wxChar *wxMDIChildFrameClassName = wxT("wxMDIChildFrameClass");
 146 const wxChar *wxMDIChildFrameClassNameNoRedraw = wxT("wxMDIChildFrameClassNR");
 147
 148 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 149 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 150 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 151
 152 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 153 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 154 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 155
 156 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 157
 158 LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 159
 160 // FIXME wxUSE_ON_FATAL_EXCEPTION is only supported for VC++ now because it
 161 //       needs compiler support for Win32 SEH. Others (especially Borland)
 162 //       probably have it too, but I'm not sure about how it works
 163 // JACS: get 'Cannot use __try in functions that require unwinding
 164 // in Unicode mode, so disabling.
 165 #if !defined(__VISUALC__) || defined(__WIN16__) || defined(UNICODE)
 166     #undef wxUSE_ON_FATAL_EXCEPTION
 167     #define wxUSE_ON_FATAL_EXCEPTION 0
 168 #endif // VC++
 169
 170 #if wxUSE_ON_FATAL_EXCEPTION
 171     static bool gs_handleExceptions = FALSE;
 172 #endif
 173
 174 // ===========================================================================
 175 // implementation
 176 // ===========================================================================
 177
 178 // ---------------------------------------------------------------------------
 179 // wxApp
 180 // ---------------------------------------------------------------------------
 181
 182 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 183
 184 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 185     EVT_IDLE(wxApp::OnIdle)
 186     EVT_END_SESSION(wxApp::OnEndSession)
 187     EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 188 END_EVENT_TABLE()
 189
 190 //// Initialize
 191 bool wxApp::Initialize()
 192 {
 193     // the first thing to do is to check if we're trying to run an Unicode
 194     // program under Win9x w/o MSLU emulation layer - if so, abort right now
 195     // as it has no chance to work
 196 #if wxUSE_UNICODE && !wxUSE_UNICODE_MSLU
 197     if ( wxGetOsVersion() != wxWINDOWS_NT )
 198     {
 199         // note that we can use MessageBoxW() as it's implemented even under
 200         // Win9x - OTOH, we can't use wxGetTranslation() because the file APIs
 201         // used by wxLocale are not
 202         ::MessageBox
 203         (
 204          NULL,
 205          _T("This program uses Unicode and requires Windows NT/2000/XP.\nProgram aborted."),
 206          _T("wxWindows Fatal Error"),
 207          MB_ICONERROR | MB_OK
 208         );
 209
 210         return FALSE;
 211     }
 212 #endif // wxUSE_UNICODE && !wxUSE_UNICODE_MSLU
 213
 214     wxBuffer = new wxChar[1500]; // FIXME
 215
 216     wxClassInfo::InitializeClasses();
 217
 218 #if wxUSE_THREADS
 219     wxPendingEventsLocker = new wxCriticalSection;
 220 #endif
 221
 222     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 223     wxTheColourDatabase->Initialize();
 224
 225     wxInitializeStockLists();
 226     wxInitializeStockObjects();
 227
 228 #if wxUSE_WX_RESOURCES
 229     wxInitializeResourceSystem();
 230 #endif
 231
 232     wxBitmap::InitStandardHandlers();
 233
 234 #if defined(__WIN95__) && !defined(__WXMICROWIN__)
 235     InitCommonControls();
 236 #endif // __WIN95__
 237
 238 #if wxUSE_OLE || wxUSE_DRAG_AND_DROP
 239
 240 #ifdef __WIN16__
 241     // for OLE, enlarge message queue to be as large as possible
 242     int iMsg = 96;
 243     while (!SetMessageQueue(iMsg) && (iMsg -= 8))
 244         ;
 245 #endif // Win16
 246
 247 #if wxUSE_OLE
 248     // we need to initialize OLE library
 249     if ( FAILED(::OleInitialize(NULL)) )
 250         wxLogError(_("Cannot initialize OLE"));
 251 #endif
 252
 253 #endif // wxUSE_OLE
 254
 255 #if wxUSE_CTL3D
 256     if (!Ctl3dRegister(wxhInstance))
 257         wxLogError(wxT("Cannot register CTL3D"));
 258
 259     Ctl3dAutoSubclass(wxhInstance);
 260 #endif // wxUSE_CTL3D
 261
 262     // VZ: these icons are not in wx.rc anyhow (but should they?)!
 263 #if 0
 264     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
 265     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
 266     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
 267
 268     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
 269     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
 270     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDICHILDFRAME"));
 271 #endif // 0
 272
 273     RegisterWindowClasses();
 274
 275 #ifndef __WXMICROWIN__
 276     // Create the brush for disabling bitmap buttons
 277
 278     LOGBRUSH lb;
 279     lb.lbStyle = BS_PATTERN;
 280     lb.lbColor = 0;
 281     lb.lbHatch = (int)LoadBitmap( wxhInstance, wxT("wxDISABLE_BUTTON_BITMAP") );
 282     if ( lb.lbHatch )
 283     {
 284         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 285         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 286     }
 287     //else: wxWindows resources are probably not linked in
 288 #endif
 289
 290 #if wxUSE_PENWINDOWS
 291     wxRegisterPenWin();
 292 #endif
 293
 294     wxWinHandleHash = new wxWinHashTable(wxKEY_INTEGER, 100);
 295
 296     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 297     // PLEASE DO NOT ALTER THIS.
 298 #if defined(__VISUALC__) && defined(__WIN16__) && !defined(WXMAKINGDLL)
 299     extern char wxDummyChar;
 300     if (wxDummyChar) wxDummyChar++;
 301 #endif
 302
 303 #ifndef __WXMICROWIN__
 304     wxSetKeyboardHook(TRUE);
 305 #endif
 306
 307     wxModule::RegisterModules();
 308     if (!wxModule::InitializeModules())
 309         return FALSE;
 310     return TRUE;
 311 }
 312
 313 // ---------------------------------------------------------------------------
 314 // RegisterWindowClasses
 315 // ---------------------------------------------------------------------------
 316
 317 // TODO we should only register classes really used by the app. For this it
 318 //      would be enough to just delay the class registration until an attempt
 319 //      to create a window of this class is made.
 320 bool wxApp::RegisterWindowClasses()
 321 {
 322     WNDCLASS wndclass;
 323     wxZeroMemory(wndclass);
 324
 325     // for each class we register one with CS_(V|H)REDRAW style and one
 326     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 327     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 328     static const long styleNoRedraw = CS_DBLCLKS;
 329
 330     // the fields which are common to all classes
 331     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 332     wndclass.hInstance     = wxhInstance;
 333     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 334
 335     // Register the frame window class.
 336     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 337     wndclass.lpszClassName = wxCanvasClassName;
 338     wndclass.style         = styleNormal;
 339
 340     if ( !RegisterClass(&wndclass) )
 341     {
 342         wxLogLastError(wxT("RegisterClass(frame)"));
 343     }
 344
 345     // "no redraw" frame
 346     wndclass.lpszClassName = wxCanvasClassNameNR;
 347     wndclass.style         = styleNoRedraw;
 348
 349     if ( !RegisterClass(&wndclass) )
 350     {
 351         wxLogLastError(wxT("RegisterClass(no redraw frame)"));
 352     }
 353
 354     // Register the MDI frame window class.
 355     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 356     wndclass.lpszClassName = wxMDIFrameClassName;
 357     wndclass.style         = styleNormal;
 358
 359     if ( !RegisterClass(&wndclass) )
 360     {
 361         wxLogLastError(wxT("RegisterClass(MDI parent)"));
 362     }
 363
 364     // "no redraw" MDI frame
 365     wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
 366     wndclass.style         = styleNoRedraw;
 367
 368     if ( !RegisterClass(&wndclass) )
 369     {
 370         wxLogLastError(wxT("RegisterClass(no redraw MDI parent frame)"));
 371     }
 372
 373     // Register the MDI child frame window class.
 374     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 375     wndclass.lpszClassName = wxMDIChildFrameClassName;
 376     wndclass.style         = styleNormal;
 377
 378     if ( !RegisterClass(&wndclass) )
 379     {
 380         wxLogLastError(wxT("RegisterClass(MDI child)"));
 381     }
 382
 383     // "no redraw" MDI child frame
 384     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 385     wndclass.style         = styleNoRedraw;
 386
 387     if ( !RegisterClass(&wndclass) )
 388     {
 389         wxLogLastError(wxT("RegisterClass(no redraw MDI child)"));
 390     }
 391
 392     return TRUE;
 393 }
 394
 395 // ---------------------------------------------------------------------------
 396 // UnregisterWindowClasses
 397 // ---------------------------------------------------------------------------
 398
 399 bool wxApp::UnregisterWindowClasses()
 400 {
 401     bool retval = TRUE;
 402
 403 #ifndef __WXMICROWIN__
 404     // MDI frame window class.
 405     if ( !::UnregisterClass(wxMDIFrameClassName, wxhInstance) )
 406     {
 407         wxLogLastError(wxT("UnregisterClass(MDI parent)"));
 408
 409         retval = FALSE;
 410     }
 411
 412     // "no redraw" MDI frame
 413     if ( !::UnregisterClass(wxMDIFrameClassNameNoRedraw, wxhInstance) )
 414     {
 415         wxLogLastError(wxT("UnregisterClass(no redraw MDI parent frame)"));
 416
 417         retval = FALSE;
 418     }
 419
 420     // MDI child frame window class.
 421     if ( !::UnregisterClass(wxMDIChildFrameClassName, wxhInstance) )
 422     {
 423         wxLogLastError(wxT("UnregisterClass(MDI child)"));
 424
 425         retval = FALSE;
 426     }
 427
 428     // "no redraw" MDI child frame
 429     if ( !::UnregisterClass(wxMDIChildFrameClassNameNoRedraw, wxhInstance) )
 430     {
 431         wxLogLastError(wxT("UnregisterClass(no redraw MDI child)"));
 432
 433         retval = FALSE;
 434     }
 435
 436     // canvas class name
 437     if ( !::UnregisterClass(wxCanvasClassName, wxhInstance) )
 438     {
 439         wxLogLastError(wxT("UnregisterClass(canvas)"));
 440
 441         retval = FALSE;
 442     }
 443
 444     if ( !::UnregisterClass(wxCanvasClassNameNR, wxhInstance) )
 445     {
 446         wxLogLastError(wxT("UnregisterClass(no redraw canvas)"));
 447
 448         retval = FALSE;
 449     }
 450 #endif // __WXMICROWIN__
 451
 452     return retval;
 453 }
 454
 455 // ---------------------------------------------------------------------------
 456 // Convert Windows to argc, argv style
 457 // ---------------------------------------------------------------------------
 458
 459 void wxApp::ConvertToStandardCommandArgs(const char* lpCmdLine)
 460 {
 461     // break the command line in words
 462     wxArrayString args =
 463         wxCmdLineParser::ConvertStringToArgs(wxConvertMB2WX(lpCmdLine));
 464
 465     // +1 here for the program name
 466     argc = args.GetCount() + 1;
 467
 468     // and +1 here for the terminating NULL
 469     argv = new wxChar *[argc + 1];
 470
 471     argv[0] = new wxChar[260]; // 260 is MAX_PATH value from windef.h
 472     ::GetModuleFileName(wxhInstance, argv[0], 260);
 473
 474     // also set the app name from argv[0]
 475     wxString name;
 476     wxFileName::SplitPath(argv[0], NULL, &name, NULL);
 477
 478     // but don't override the name already set by the user code, if any
 479     if ( GetAppName().empty() )
 480         SetAppName(name);
 481
 482     // copy all the other arguments to wxApp::argv[]
 483     for ( int i = 1; i < argc; i++ )
 484     {
 485         argv[i] = copystring(args[i - 1]);
 486     }
 487
 488     // argv[] must be NULL-terminated
 489     argv[argc] = NULL;
 490 }
 491
 492 //// Cleans up any wxWindows internal structures left lying around
 493
 494 void wxApp::CleanUp()
 495 {
 496     //// COMMON CLEANUP
 497
 498 #if wxUSE_LOG
 499     // flush the logged messages if any and install a 'safer' log target: the
 500     // default one (wxLogGui) can't be used after the resources are freed just
 501     // below and the user suppliedo ne might be even more unsafe (using any
 502     // wxWindows GUI function is unsafe starting from now)
 503     wxLog::DontCreateOnDemand();
 504
 505     // this will flush the old messages if any
 506     delete wxLog::SetActiveTarget(new wxLogStderr);
 507 #endif // wxUSE_LOG
 508
 509     // One last chance for pending objects to be cleaned up
 510     wxTheApp->DeletePendingObjects();
 511
 512     wxModule::CleanUpModules();
 513
 514 #if wxUSE_WX_RESOURCES
 515     wxCleanUpResourceSystem();
 516
 517     //  wxDefaultResourceTable->ClearTable();
 518 #endif
 519
 520     wxDeleteStockObjects();
 521
 522     // Destroy all GDI lists, etc.
 523     wxDeleteStockLists();
 524
 525     delete wxTheColourDatabase;
 526     wxTheColourDatabase = NULL;
 527
 528     wxBitmap::CleanUpHandlers();
 529
 530     delete[] wxBuffer;
 531     wxBuffer = NULL;
 532
 533     //// WINDOWS-SPECIFIC CLEANUP
 534
 535 #ifndef __WXMICROWIN__
 536     wxSetKeyboardHook(FALSE);
 537 #endif
 538
 539 #if wxUSE_PENWINDOWS
 540     wxCleanUpPenWin();
 541 #endif
 542
 543     if (wxSTD_FRAME_ICON)
 544         DestroyIcon(wxSTD_FRAME_ICON);
 545     if (wxSTD_MDICHILDFRAME_ICON)
 546         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 547     if (wxSTD_MDIPARENTFRAME_ICON)
 548         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 549
 550     if (wxDEFAULT_FRAME_ICON)
 551         DestroyIcon(wxDEFAULT_FRAME_ICON);
 552     if (wxDEFAULT_MDICHILDFRAME_ICON)
 553         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 554     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 555         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 556
 557     if ( wxDisableButtonBrush )
 558         ::DeleteObject( wxDisableButtonBrush );
 559
 560 #if wxUSE_OLE
 561     ::OleUninitialize();
 562 #endif
 563
 564 #ifdef WXMAKINGDLL
 565     // for an EXE the classes are unregistered when it terminates but DLL may
 566     // be loaded several times (load/unload/load) into the same process in
 567     // which case the registration will fail after the first time if we don't
 568     // unregister the classes now
 569     UnregisterWindowClasses();
 570 #endif // WXMAKINGDLL
 571
 572 #if wxUSE_CTL3D
 573     Ctl3dUnregister(wxhInstance);
 574 #endif
 575
 576     delete wxWinHandleHash;
 577
 578     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 579     // create a module for that as it's part of the core.
 580     delete wxPendingEvents;
 581
 582 #if wxUSE_THREADS
 583     delete wxPendingEventsLocker;
 584     // If we don't do the following, we get an apparent memory leak
 585 #if wxUSE_VALIDATORS
 586     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 587 #endif // wxUSE_VALIDATORS
 588 #endif // wxUSE_THREADS
 589
 590     wxClassInfo::CleanUpClasses();
 591
 592     delete wxTheApp;
 593     wxTheApp = NULL;
 594
 595 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 596     // At this point we want to check if there are any memory
 597     // blocks that aren't part of the wxDebugContext itself,
 598     // as a special case. Then when dumping we need to ignore
 599     // wxDebugContext, too.
 600     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 601     {
 602         wxLogMessage(wxT("There were memory leaks."));
 603         wxDebugContext::Dump();
 604         wxDebugContext::PrintStatistics();
 605     }
 606     //  wxDebugContext::SetStream(NULL, NULL);
 607 #endif
 608
 609 #if wxUSE_LOG
 610     // do it as the very last thing because everything else can log messages
 611     delete wxLog::SetActiveTarget(NULL);
 612 #endif // wxUSE_LOG
 613 }
 614
 615 //----------------------------------------------------------------------
 616 // Entry point helpers, used by wxPython
 617 //----------------------------------------------------------------------
 618
 619 int WXDLLEXPORT wxEntryStart( int WXUNUSED(argc), char** WXUNUSED(argv) )
 620 {
 621     return wxApp::Initialize();
 622 }
 623
 624 int WXDLLEXPORT wxEntryInitGui()
 625 {
 626     return wxTheApp->OnInitGui();
 627 }
 628
 629 void WXDLLEXPORT wxEntryCleanup()
 630 {
 631     wxApp::CleanUp();
 632 }
 633
 634
 635 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 636
 637 // temporarily disable this warning which would be generated in release builds
 638 // because of __try
 639 #ifdef __VISUALC__
 640     #pragma warning(disable: 4715) // not all control paths return a value
 641 #endif // Visual C++
 642
 643 //----------------------------------------------------------------------
 644 // Main wxWindows entry point
 645 //----------------------------------------------------------------------
 646 int wxEntry(WXHINSTANCE hInstance,
 647             WXHINSTANCE WXUNUSED(hPrevInstance),
 648             char *lpCmdLine,
 649             int nCmdShow,
 650             bool enterLoop)
 651 {
 652     // do check for memory leaks on program exit
 653     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 654     //  deallocated memory which may be used to simulate low-memory condition)
 655 #ifndef __WXMICROWIN__
 656     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 657 #endif
 658
 659 #ifdef __MWERKS__
 660 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 661     // This seems to be necessary since there are 'rogue'
 662     // objects present at this point (perhaps global objects?)
 663     // Setting a checkpoint will ignore them as far as the
 664     // memory checking facility is concerned.
 665     // Of course you may argue that memory allocated in globals should be
 666     // checked, but this is a reasonable compromise.
 667     wxDebugContext::SetCheckpoint();
 668 #endif
 669 #endif
 670
 671     // take everything into a try-except block to be able to call
 672     // OnFatalException() if necessary
 673 #if wxUSE_ON_FATAL_EXCEPTION
 674     __try {
 675 #endif
 676         wxhInstance = (HINSTANCE) hInstance;
 677
 678         if (!wxEntryStart(0,0))
 679             return 0;
 680
 681         // create the application object or ensure that one already exists
 682         if (!wxTheApp)
 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
 686             // function for delayed, dynamic app object construction.
 687             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 688                          wxT("No initializer - use IMPLEMENT_APP macro.") );
 689
 690             wxTheApp = (wxApp*) (*wxApp::GetInitializerFunction()) ();
 691         }
 692
 693         wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
 694
 695         // save the WinMain() parameters
 696         if (lpCmdLine) // MicroWindows passes NULL
 697             wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 698         wxTheApp->m_nCmdShow = nCmdShow;
 699
 700         // We really don't want timestamps by default, because it means
 701         // we can't simply double-click on the error message and get to that
 702         // line in the source. So VC++ at least, let's have a sensible default.
 703 #ifdef __VISUALC__
 704 #if wxUSE_LOG
 705         wxLog::SetTimestamp(NULL);
 706 #endif // wxUSE_LOG
 707 #endif // __VISUALC__
 708
 709         // init the app
 710         int retValue = wxEntryInitGui() && wxTheApp->OnInit() ? 0 : -1;
 711
 712         if ( retValue == 0 )
 713         {
 714             if ( enterLoop )
 715             {
 716                 // run the main loop
 717                 wxTheApp->OnRun();
 718             }
 719             else
 720             {
 721                 // we want to initialize, but not run or exit immediately.
 722                 return 1;
 723             }
 724         }
 725         //else: app initialization failed, so we skipped OnRun()
 726
 727         wxWindow *topWindow = wxTheApp->GetTopWindow();
 728         if ( topWindow )
 729         {
 730             // Forcibly delete the window.
 731             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 732                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 733             {
 734                 topWindow->Close(TRUE);
 735                 wxTheApp->DeletePendingObjects();
 736             }
 737             else
 738             {
 739                 delete topWindow;
 740                 wxTheApp->SetTopWindow(NULL);
 741             }
 742         }
 743
 744         retValue = wxTheApp->OnExit();
 745
 746         wxEntryCleanup();
 747
 748         return retValue;
 749
 750 #if wxUSE_ON_FATAL_EXCEPTION
 751     }
 752     __except ( gs_handleExceptions ? EXCEPTION_EXECUTE_HANDLER
 753                                    : EXCEPTION_CONTINUE_SEARCH ) {
 754         if ( wxTheApp )
 755         {
 756            // give the user a chance to do something special about this
 757            wxTheApp->OnFatalException();
 758         }
 759
 760         ::ExitProcess(3); // the same exit code as abort()
 761
 762         // NOTREACHED
 763     }
 764 #endif // wxUSE_ON_FATAL_EXCEPTION
 765 }
 766
 767 // restore warning state
 768 #ifdef __VISUALC__
 769     #pragma warning(default: 4715) // not all control paths return a value
 770 #endif // Visual C++
 771
 772 #else /*  _WINDLL  */
 773
 774 //----------------------------------------------------------------------
 775 // Entry point for wxWindows + the App in a DLL
 776 //----------------------------------------------------------------------
 777
 778 int wxEntry(WXHINSTANCE hInstance)
 779 {
 780     wxhInstance = (HINSTANCE) hInstance;
 781     wxEntryStart(0, 0);
 782
 783     // The app may have declared a global application object, but we recommend
 784     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 785     // for delayed, dynamic app object construction.
 786     if (!wxTheApp)
 787     {
 788         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 789                      "No initializer - use IMPLEMENT_APP macro." );
 790
 791         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 792     }
 793
 794     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 795
 796     wxTheApp->argc = 0;
 797     wxTheApp->argv = NULL;
 798
 799     wxEntryInitGui();
 800
 801     wxTheApp->OnInit();
 802
 803     wxWindow *topWindow = wxTheApp->GetTopWindow();
 804     if ( topWindow && topWindow->GetHWND())
 805     {
 806         topWindow->Show(TRUE);
 807     }
 808
 809     return 1;
 810 }
 811 #endif // _WINDLL
 812
 813 //// Static member initialization
 814
 815 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 816
 817 wxApp::wxApp()
 818 {
 819     argc = 0;
 820     argv = NULL;
 821     m_printMode = wxPRINT_WINDOWS;
 822     m_auto3D = TRUE;
 823 }
 824
 825 wxApp::~wxApp()
 826 {
 827     // Delete command-line args
 828     int i;
 829     for (i = 0; i < argc; i++)
 830     {
 831         delete[] argv[i];
 832     }
 833     delete[] argv;
 834 }
 835
 836 bool wxApp::Initialized()
 837 {
 838 #ifndef _WINDLL
 839     if (GetTopWindow())
 840         return TRUE;
 841     else
 842         return FALSE;
 843 #else // Assume initialized if DLL (no way of telling)
 844     return TRUE;
 845 #endif
 846 }
 847
 848 /*
 849  * Get and process a message, returning FALSE if WM_QUIT
 850  * received (and also set the flag telling the app to exit the main loop)
 851  *
 852  */
 853 bool wxApp::DoMessage()
 854 {
 855     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 856     if ( rc == 0 )
 857     {
 858         // got WM_QUIT
 859         m_keepGoing = FALSE;
 860
 861         return FALSE;
 862     }
 863     else if ( rc == -1 )
 864     {
 865         // should never happen, but let's test for it nevertheless
 866         wxLogLastError(wxT("GetMessage"));
 867     }
 868     else
 869     {
 870 #if wxUSE_THREADS
 871         wxASSERT_MSG( wxThread::IsMain(),
 872                       wxT("only the main thread can process Windows messages") );
 873
 874         static bool s_hadGuiLock = TRUE;
 875         static wxMsgArray s_aSavedMessages;
 876
 877         // if a secondary thread owns is doing GUI calls, save all messages for
 878         // later processing - we can't process them right now because it will
 879         // lead to recursive library calls (and we're not reentrant)
 880         if ( !wxGuiOwnedByMainThread() )
 881         {
 882             s_hadGuiLock = FALSE;
 883
 884             // leave out WM_COMMAND messages: too dangerous, sometimes
 885             // the message will be processed twice
 886             if ( !wxIsWaitingForThread() ||
 887                     s_currentMsg.message != WM_COMMAND )
 888             {
 889                 s_aSavedMessages.Add(s_currentMsg);
 890             }
 891
 892             return TRUE;
 893         }
 894         else
 895         {
 896             // have we just regained the GUI lock? if so, post all of the saved
 897             // messages
 898             //
 899             // FIXME of course, it's not _exactly_ the same as processing the
 900             //       messages normally - expect some things to break...
 901             if ( !s_hadGuiLock )
 902             {
 903                 s_hadGuiLock = TRUE;
 904
 905                 size_t count = s_aSavedMessages.GetCount();
 906                 for ( size_t n = 0; n < count; n++ )
 907                 {
 908                     MSG& msg = s_aSavedMessages[n];
 909
 910                     DoMessage((WXMSG *)&msg);
 911                 }
 912
 913                 s_aSavedMessages.Empty();
 914             }
 915         }
 916 #endif // wxUSE_THREADS
 917
 918         // Process the message
 919         DoMessage((WXMSG *)&s_currentMsg);
 920     }
 921
 922     return TRUE;
 923 }
 924
 925 void wxApp::DoMessage(WXMSG *pMsg)
 926 {
 927     if ( !ProcessMessage(pMsg) )
 928     {
 929         ::TranslateMessage((MSG *)pMsg);
 930         ::DispatchMessage((MSG *)pMsg);
 931     }
 932 }
 933
 934 /*
 935  * Keep trying to process messages until WM_QUIT
 936  * received.
 937  *
 938  * If there are messages to be processed, they will all be
 939  * processed and OnIdle will not be called.
 940  * When there are no more messages, OnIdle is called.
 941  * If OnIdle requests more time,
 942  * it will be repeatedly called so long as there are no pending messages.
 943  * A 'feature' of this is that once OnIdle has decided that no more processing
 944  * is required, then it won't get processing time until further messages
 945  * are processed (it'll sit in DoMessage).
 946  */
 947
 948 int wxApp::MainLoop()
 949 {
 950     m_keepGoing = TRUE;
 951
 952     while ( m_keepGoing )
 953     {
 954 #if wxUSE_THREADS
 955         wxMutexGuiLeaveOrEnter();
 956 #endif // wxUSE_THREADS
 957
 958         while ( !Pending() && ProcessIdle() )
 959             ;
 960
 961         // a message came or no more idle processing to do
 962         DoMessage();
 963     }
 964
 965     return s_currentMsg.wParam;
 966 }
 967
 968 // Returns TRUE if more time is needed.
 969 bool wxApp::ProcessIdle()
 970 {
 971     wxIdleEvent event;
 972     event.SetEventObject(this);
 973     ProcessEvent(event);
 974
 975     return event.MoreRequested();
 976 }
 977
 978 void wxApp::ExitMainLoop()
 979 {
 980     // this will set m_keepGoing to FALSE a bit later
 981     ::PostQuitMessage(0);
 982 }
 983
 984 bool wxApp::Pending()
 985 {
 986     return ::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0;
 987 }
 988
 989 void wxApp::Dispatch()
 990 {
 991     DoMessage();
 992 }
 993
 994 /*
 995  * Give all windows a chance to preprocess
 996  * the message. Some may have accelerator tables, or have
 997  * MDI complications.
 998  */
 999
1000 bool wxApp::ProcessMessage(WXMSG *wxmsg)
1001 {
1002     MSG *msg = (MSG *)wxmsg;
1003     HWND hwnd = msg->hwnd;
1004     wxWindow *wndThis = wxGetWindowFromHWND((WXHWND)hwnd);
1005
1006     // this may happen if the event occured in a standard modeless dialog (the
1007     // only example of which I know of is the find/replace dialog) - then call
1008     // IsDialogMessage() to make TAB navigation in it work
1009     if ( !wndThis )
1010     {
1011         // we need to find the dialog containing this control as
1012         // IsDialogMessage() just eats all the messages (i.e. returns TRUE for
1013         // them) if we call it for the control itself
1014         while ( hwnd && ::GetWindowLong(hwnd, GWL_STYLE) & WS_CHILD )
1015         {
1016             hwnd = ::GetParent(hwnd);
1017         }
1018
1019         return hwnd && ::IsDialogMessage(hwnd, msg) != 0;
1020     }
1021
1022 #if wxUSE_TOOLTIPS
1023     // we must relay WM_MOUSEMOVE events to the tooltip ctrl if we want it to
1024     // popup the tooltip bubbles
1025     if ( (msg->message == WM_MOUSEMOVE) )
1026     {
1027         wxToolTip *tt = wndThis->GetToolTip();
1028         if ( tt )
1029         {
1030             tt->RelayEvent(wxmsg);
1031         }
1032     }
1033 #endif // wxUSE_TOOLTIPS
1034
1035     // allow the window to prevent certain messages from being
1036     // translated/processed (this is currently used by wxTextCtrl to always
1037     // grab Ctrl-C/V/X, even if they are also accelerators in some parent)
1038     if ( !wndThis->MSWShouldPreProcessMessage(wxmsg) )
1039     {
1040         return FALSE;
1041     }
1042
1043     // try translations first: the accelerators override everything
1044     wxWindow *wnd;
1045
1046     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
1047     {
1048         if ( wnd->MSWTranslateMessage(wxmsg))
1049             return TRUE;
1050
1051         // stop at first top level window, i.e. don't try to process the key
1052         // strokes originating in a dialog using the accelerators of the parent
1053         // frame - this doesn't make much sense
1054         if ( wnd->IsTopLevel() )
1055             break;
1056     }
1057
1058     // now try the other hooks (kbd navigation is handled here): we start from
1059     // wndThis->GetParent() because wndThis->MSWProcessMessage() was already
1060     // called above
1061     for ( wnd = wndThis->GetParent(); wnd; wnd = wnd->GetParent() )
1062     {
1063         if ( wnd->MSWProcessMessage(wxmsg) )
1064             return TRUE;
1065     }
1066
1067     // no special preprocessing for this message, dispatch it normally
1068     return FALSE;
1069 }
1070
1071 // this is a temporary hack and will be replaced by using wxEventLoop in the
1072 // future
1073 //
1074 // it is needed to allow other event loops (currently only one: the modal
1075 // dialog one) to reset the OnIdle() semaphore because otherwise OnIdle()
1076 // wouldn't do anything while a modal dialog shown from OnIdle() call is shown.
1077 bool wxIsInOnIdleFlag = FALSE;
1078
1079 void wxApp::OnIdle(wxIdleEvent& event)
1080 {
1081     // Avoid recursion (via ProcessEvent default case)
1082     if ( wxIsInOnIdleFlag )
1083         return;
1084
1085     wxIsInOnIdleFlag = TRUE;
1086
1087     // If there are pending events, we must process them: pending events
1088     // are either events to the threads other than main or events posted
1089     // with wxPostEvent() functions
1090     // GRG: I have moved this here so that all pending events are processed
1091     //   before starting to delete any objects. This behaves better (in
1092     //   particular, wrt wxPostEvent) and is coherent with wxGTK's current
1093     //   behaviour. Changed Feb/2000 before 2.1.14
1094     ProcessPendingEvents();
1095
1096     // 'Garbage' collection of windows deleted with Close().
1097     DeletePendingObjects();
1098
1099 #if wxUSE_LOG
1100     // flush the logged messages if any
1101     wxLog::FlushActive();
1102 #endif // wxUSE_LOG
1103
1104 #if wxUSE_DC_CACHEING
1105     // automated DC cache management: clear the cached DCs and bitmap
1106     // if it's likely that the app has finished with them, that is, we
1107     // get an idle event and we're not dragging anything.
1108     if (!::GetKeyState(MK_LBUTTON) && !::GetKeyState(MK_MBUTTON) && !::GetKeyState(MK_RBUTTON))
1109         wxDC::ClearCache();
1110 #endif // wxUSE_DC_CACHEING
1111
1112     // Send OnIdle events to all windows
1113     if ( SendIdleEvents() )
1114     {
1115         // SendIdleEvents() returns TRUE if at least one window requested more
1116         // idle events
1117         event.RequestMore(TRUE);
1118     }
1119
1120     wxIsInOnIdleFlag = FALSE;
1121 }
1122
1123 // Send idle event to all top-level windows
1124 bool wxApp::SendIdleEvents()
1125 {
1126     bool needMore = FALSE;
1127
1128     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1129     while (node)
1130     {
1131         wxWindow* win = node->GetData();
1132         if (SendIdleEvents(win))
1133             needMore = TRUE;
1134         node = node->GetNext();
1135     }
1136
1137     return needMore;
1138 }
1139
1140 // Send idle event to window and all subwindows
1141 bool wxApp::SendIdleEvents(wxWindow* win)
1142 {
1143     wxIdleEvent event;
1144     event.SetEventObject(win);
1145     win->GetEventHandler()->ProcessEvent(event);
1146
1147     bool needMore = event.MoreRequested();
1148
1149     wxWindowList::Node *node = win->GetChildren().GetFirst();
1150     while ( node )
1151     {
1152         wxWindow *win = node->GetData();
1153         if (SendIdleEvents(win))
1154             needMore = TRUE;
1155
1156         node = node->GetNext();
1157     }
1158
1159     return needMore;
1160 }
1161
1162 void wxApp::DeletePendingObjects()
1163 {
1164     wxNode *node = wxPendingDelete.GetFirst();
1165     while (node)
1166     {
1167         wxObject *obj = node->GetData();
1168
1169         delete obj;
1170
1171         if (wxPendingDelete.Member(obj))
1172             delete node;
1173
1174         // Deleting one object may have deleted other pending
1175         // objects, so start from beginning of list again.
1176         node = wxPendingDelete.GetFirst();
1177     }
1178 }
1179
1180 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1181 {
1182     if (GetTopWindow())
1183         GetTopWindow()->Close(TRUE);
1184 }
1185
1186 // Default behaviour: close the application with prompts. The
1187 // user can veto the close, and therefore the end session.
1188 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1189 {
1190     if (GetTopWindow())
1191     {
1192         if (!GetTopWindow()->Close(!event.CanVeto()))
1193             event.Veto(TRUE);
1194     }
1195 }
1196
1197 /* static */
1198 int wxApp::GetComCtl32Version()
1199 {
1200 #ifdef __WXMICROWIN__
1201     return 0;
1202 #else
1203     // cache the result
1204     static int s_verComCtl32 = -1;
1205
1206     wxCRIT_SECT_DECLARE(csComCtl32);
1207     wxCRIT_SECT_LOCKER(lock, csComCtl32);
1208
1209     if ( s_verComCtl32 == -1 )
1210     {
1211         // initally assume no comctl32.dll at all
1212         s_verComCtl32 = 0;
1213
1214         // do we have it?
1215         HMODULE hModuleComCtl32 = ::GetModuleHandle(wxT("COMCTL32"));
1216
1217         // if so, then we can check for the version
1218         if ( hModuleComCtl32 )
1219         {
1220             // try to use DllGetVersion() if available in _headers_
1221             #ifdef DLLVER_PLATFORM_WINDOWS // defined in shlwapi.h
1222                 DLLGETVERSIONPROC pfnDllGetVersion = (DLLGETVERSIONPROC)
1223                     ::GetProcAddress(hModuleComCtl32, "DllGetVersion");
1224                 if ( pfnDllGetVersion )
1225                 {
1226                     DLLVERSIONINFO dvi;
1227                     dvi.cbSize = sizeof(dvi);
1228
1229                     HRESULT hr = (*pfnDllGetVersion)(&dvi);
1230                     if ( FAILED(hr) )
1231                     {
1232                         wxLogApiError(_T("DllGetVersion"), hr);
1233                     }
1234                     else
1235                     {
1236                         // this is incompatible with _WIN32_IE values, but
1237                         // compatible with the other values returned by
1238                         // GetComCtl32Version()
1239                         s_verComCtl32 = 100*dvi.dwMajorVersion +
1240                                             dvi.dwMinorVersion;
1241                     }
1242                 }
1243             #endif
1244                 // DllGetVersion() unavailable either during compile or
1245                 // run-time, try to guess the version otherwise
1246                 if ( !s_verComCtl32 )
1247                 {
1248                     // InitCommonControlsEx is unique to 4.70 and later
1249                     FARPROC theProc = ::GetProcAddress
1250                                         (
1251                                          hModuleComCtl32,
1252                                          "InitCommonControlsEx"
1253                                         );
1254
1255                     if ( !theProc )
1256                     {
1257                         // not found, must be 4.00
1258                         s_verComCtl32 = 400;
1259                     }
1260                     else
1261                     {
1262                         // many symbols appeared in comctl32 4.71, could use
1263                         // any of them except may be DllInstall
1264                         theProc = ::GetProcAddress
1265                                     (
1266                                      hModuleComCtl32,
1267                                      "InitializeFlatSB"
1268                                     );
1269                         if ( !theProc )
1270                         {
1271                             // not found, must be 4.70
1272                             s_verComCtl32 = 470;
1273                         }
1274                         else
1275                         {
1276                             // found, must be 4.71
1277                             s_verComCtl32 = 471;
1278                         }
1279                     }
1280                 }
1281         }
1282     }
1283
1284     return s_verComCtl32;
1285 #endif
1286 }
1287
1288 void wxExit()
1289 {
1290     if ( wxTheApp )
1291     {
1292         wxTheApp->ExitMainLoop();
1293     }
1294     else
1295     {
1296         // what else can we do?
1297         exit(-1);
1298     }
1299 }
1300
1301 // Yield to incoming messages
1302
1303 bool wxApp::Yield(bool onlyIfNeeded)
1304 {
1305     // MT-FIXME
1306     static bool s_inYield = FALSE;
1307
1308 #if wxUSE_LOG
1309     // disable log flushing from here because a call to wxYield() shouldn't
1310     // normally result in message boxes popping up &c
1311     wxLog::Suspend();
1312 #endif // wxUSE_LOG
1313
1314     if ( s_inYield )
1315     {
1316         if ( !onlyIfNeeded )
1317         {
1318             wxFAIL_MSG( wxT("wxYield called recursively" ) );
1319         }
1320
1321         return FALSE;
1322     }
1323
1324     s_inYield = TRUE;
1325
1326     // we don't want to process WM_QUIT from here - it should be processed in
1327     // the main event loop in order to stop it
1328     MSG msg;
1329     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
1330             msg.message != WM_QUIT )
1331     {
1332 #if wxUSE_THREADS
1333         wxMutexGuiLeaveOrEnter();
1334 #endif // wxUSE_THREADS
1335
1336         if ( !wxTheApp->DoMessage() )
1337             break;
1338     }
1339
1340     // if there are pending events, we must process them.
1341     ProcessPendingEvents();
1342
1343 #if wxUSE_LOG
1344     // let the logs be flashed again
1345     wxLog::Resume();
1346 #endif // wxUSE_LOG
1347
1348     s_inYield = FALSE;
1349
1350     return TRUE;
1351 }
1352
1353 bool wxHandleFatalExceptions(bool doit)
1354 {
1355 #if wxUSE_ON_FATAL_EXCEPTION
1356     // assume this can only be called from the main thread
1357     gs_handleExceptions = doit;
1358
1359     return TRUE;
1360 #else
1361     wxFAIL_MSG(_T("set wxUSE_ON_FATAL_EXCEPTION to 1 to use this function"));
1362
1363     (void)doit;
1364     return FALSE;
1365 #endif
1366 }
1367
1368 //-----------------------------------------------------------------------------
1369 // wxWakeUpIdle
1370 //-----------------------------------------------------------------------------
1371
1372 void wxWakeUpIdle()
1373 {
1374     // Send the top window a dummy message so idle handler processing will
1375     // start up again.  Doing it this way ensures that the idle handler
1376     // wakes up in the right thread (see also wxWakeUpMainThread() which does
1377     // the same for the main app thread only)
1378     wxWindow *topWindow = wxTheApp->GetTopWindow();
1379     if ( topWindow )
1380     {
1381         if ( !::PostMessage(GetHwndOf(topWindow), WM_NULL, 0, 0) )
1382         {
1383             // should never happen
1384             wxLogLastError(wxT("PostMessage(WM_NULL)"));
1385         }
1386     }
1387 }
1388
1389 //-----------------------------------------------------------------------------
1390
1391 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1392 // if in a separate file. So include it here to ensure it's linked.
1393 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__WINE__) && !defined(__TWIN32__) && !defined(WXMAKINGDLL))
1394 #include "main.cpp"
1395 #endif