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 #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 #endif
  49
  50 #include "wx/log.h"
  51 #include "wx/module.h"
  52
  53 #include "wx/msw/private.h"
  54
  55 #if wxUSE_THREADS
  56     #include "wx/thread.h"
  57
  58     // define the array of MSG strutures
  59     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
  60
  61     #include "wx/arrimpl.cpp"
  62
  63     WX_DEFINE_OBJARRAY(wxMsgArray);
  64 #endif // wxUSE_THREADS
  65
  66 #if wxUSE_WX_RESOURCES
  67     #include "wx/resource.h"
  68 #endif
  69
  70 // OLE is used for drag-and-drop, clipboard, OLE Automation...
  71 #ifndef wxUSE_NORLANDER_HEADERS
  72 #if defined(__GNUWIN32__) || defined(__SC__) || defined(__SALFORDC__)
  73     #undef wxUSE_OLE
  74
  75     #define  wxUSE_OLE 0
  76 #endif // broken compilers
  77 #endif
  78
  79 #if wxUSE_OLE
  80     #include <ole2.h>
  81 #endif
  82
  83 #include <string.h>
  84 #include <ctype.h>
  85
  86 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS)
  87     #include <commctrl.h>
  88 #endif
  89
  90 #include "wx/msw/msvcrt.h"
  91
  92 // ---------------------------------------------------------------------------
  93 // global variables
  94 // ---------------------------------------------------------------------------
  95
  96 extern wxChar *wxBuffer;
  97 extern wxChar *wxOsVersion;
  98 extern wxList *wxWinHandleList;
  99 extern wxList WXDLLEXPORT wxPendingDelete;
 100 extern void wxSetKeyboardHook(bool doIt);
 101 extern wxCursor *g_globalCursor;
 102
 103 MSG s_currentMsg;
 104 wxApp *wxTheApp = NULL;
 105
 106 // FIXME why not const? and not static?
 107
 108 // NB: all "NoRedraw" classes must have the same names as the "normal" classes
 109 //     with NR suffix - wxWindow::MSWCreate() supposes this
 110 wxChar wxFrameClassName[]         = wxT("wxFrameClass");
 111 wxChar wxFrameClassNameNoRedraw[] = wxT("wxFrameClassNR");
 112 wxChar wxMDIFrameClassName[]      = wxT("wxMDIFrameClass");
 113 wxChar wxMDIFrameClassNameNoRedraw[] = wxT("wxMDIFrameClassNR");
 114 wxChar wxMDIChildFrameClassName[] = wxT("wxMDIChildFrameClass");
 115 wxChar wxMDIChildFrameClassNameNoRedraw[] = wxT("wxMDIChildFrameClassNR");
 116 wxChar wxPanelClassName[]         = wxT("wxPanelClass");
 117 wxChar wxCanvasClassName[]        = wxT("wxCanvasClass");
 118
 119 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 120 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 121 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 122
 123 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 124 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 125 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 126
 127 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 128
 129 LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 130
 131 #if wxUSE_RICHEDIT
 132     // the handle to richedit DLL and the version of the DLL loaded
 133     static HINSTANCE gs_hRichEdit = (HINSTANCE)NULL;
 134     static int gs_verRichEdit = -1;
 135 #endif
 136
 137 // ===========================================================================
 138 // implementation
 139 // ===========================================================================
 140
 141 // ---------------------------------------------------------------------------
 142 // wxApp
 143 // ---------------------------------------------------------------------------
 144
 145 #if !USE_SHARED_LIBRARY
 146     IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 147
 148     BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 149         EVT_IDLE(wxApp::OnIdle)
 150         EVT_END_SESSION(wxApp::OnEndSession)
 151         EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 152     END_EVENT_TABLE()
 153 #endif
 154
 155 //// Initialize
 156 bool wxApp::Initialize()
 157 {
 158     // Some people may wish to use this, but
 159     // probably it shouldn't be here by default.
 160 #ifdef __WXDEBUG__
 161     //    wxRedirectIOToConsole();
 162 #endif
 163
 164     wxBuffer = new wxChar[1500]; // FIXME
 165
 166     wxClassInfo::InitializeClasses();
 167
 168 #if wxUSE_RESOURCES
 169     wxGetResource(wxT("wxWindows"), wxT("OsVersion"), &wxOsVersion);
 170 #endif
 171
 172 #if wxUSE_THREADS
 173     wxPendingEventsLocker = new wxCriticalSection;
 174 #endif
 175
 176     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 177     wxTheColourDatabase->Initialize();
 178
 179     wxInitializeStockLists();
 180     wxInitializeStockObjects();
 181
 182 #if wxUSE_WX_RESOURCES
 183     wxInitializeResourceSystem();
 184 #endif
 185
 186     wxBitmap::InitStandardHandlers();
 187
 188 #if defined(__WIN95__)
 189     InitCommonControls();
 190
 191 #endif // __WIN95__
 192
 193 #if wxUSE_OLE
 194
 195 #ifdef __WIN16__
 196     // for OLE, enlarge message queue to be as large as possible
 197     int iMsg = 96;
 198     while (!SetMessageQueue(iMsg) && (iMsg -= 8))
 199         ;
 200 #endif // Win16
 201     // we need to initialize OLE library
 202     if ( FAILED(::OleInitialize(NULL)) )
 203         wxLogError(_("Cannot initialize OLE"));
 204 #endif // wxUSE_OLE
 205
 206 #if wxUSE_CTL3D
 207     if (!Ctl3dRegister(wxhInstance))
 208         wxLogError(wxT("Cannot register CTL3D"));
 209
 210     Ctl3dAutoSubclass(wxhInstance);
 211 #endif
 212
 213     g_globalCursor = new wxCursor;
 214
 215     // VZ: these icons are not in wx.rc anyhow (but should they?)!
 216 #if 0
 217     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
 218     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
 219     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
 220
 221     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
 222     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
 223     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDICHILDFRAME"));
 224 #endif // 0
 225
 226     RegisterWindowClasses();
 227
 228     // Create the brush for disabling bitmap buttons
 229
 230     LOGBRUSH lb;
 231     lb.lbStyle = BS_PATTERN;
 232     lb.lbHatch = (int)LoadBitmap( wxhInstance, wxT("wxDISABLE_BUTTON_BITMAP") );
 233     if ( lb.lbHatch )
 234     {
 235         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 236         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 237     }
 238     //else: wxWindows resources are probably not linked in
 239
 240 #if wxUSE_PENWINDOWS
 241     wxRegisterPenWin();
 242 #endif
 243
 244     wxWinHandleList = new wxList(wxKEY_INTEGER);
 245
 246     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 247     // PLEASE DO NOT ALTER THIS.
 248 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 249     extern char wxDummyChar;
 250     if (wxDummyChar) wxDummyChar++;
 251 #endif
 252
 253     wxSetKeyboardHook(TRUE);
 254
 255     wxModule::RegisterModules();
 256     if (!wxModule::InitializeModules())
 257         return FALSE;
 258     return TRUE;
 259 }
 260
 261 // ---------------------------------------------------------------------------
 262 // RegisterWindowClasses
 263 // ---------------------------------------------------------------------------
 264
 265 // TODO we should only register classes really used by the app. For this it
 266 //      would be enough to just delay the class registration until an attempt
 267 //      to create a window of this class is made.
 268 bool wxApp::RegisterWindowClasses()
 269 {
 270     WNDCLASS wndclass;
 271
 272     // for each class we register one with CS_(V|H)REDRAW style and one
 273     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 274     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 275     static const long styleNoRedraw = CS_DBLCLKS;
 276
 277     // the fields which are common to all classes
 278     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 279     wndclass.cbClsExtra    = 0;
 280     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 281     wndclass.hInstance     = wxhInstance;
 282     wndclass.hIcon         = (HICON) NULL;
 283     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 284     wndclass.lpszMenuName  = NULL;
 285
 286     // Register the frame window class.
 287     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 288     wndclass.lpszClassName = wxFrameClassName;
 289     wndclass.style         = styleNormal;
 290
 291     if ( !RegisterClass(&wndclass) )
 292     {
 293         wxLogLastError("RegisterClass(frame)");
 294
 295         return FALSE;
 296     }
 297
 298     // "no redraw" frame
 299     wndclass.lpszClassName = wxFrameClassNameNoRedraw;
 300     wndclass.style         = styleNoRedraw;
 301
 302     if ( !RegisterClass(&wndclass) )
 303     {
 304         wxLogLastError("RegisterClass(no redraw frame)");
 305
 306         return FALSE;
 307     }
 308
 309     // Register the MDI frame window class.
 310     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 311     wndclass.lpszClassName = wxMDIFrameClassName;
 312     wndclass.style         = styleNormal;
 313
 314     if ( !RegisterClass(&wndclass) )
 315     {
 316         wxLogLastError("RegisterClass(MDI parent)");
 317
 318         return FALSE;
 319     }
 320
 321     // "no redraw" MDI frame
 322     wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
 323     wndclass.style         = styleNoRedraw;
 324
 325     if ( !RegisterClass(&wndclass) )
 326     {
 327         wxLogLastError("RegisterClass(no redraw MDI parent frame)");
 328
 329         return FALSE;
 330     }
 331
 332     // Register the MDI child frame window class.
 333     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 334     wndclass.lpszClassName = wxMDIChildFrameClassName;
 335     wndclass.style         = styleNormal;
 336
 337     if ( !RegisterClass(&wndclass) )
 338     {
 339         wxLogLastError("RegisterClass(MDI child)");
 340
 341         return FALSE;
 342     }
 343
 344     // "no redraw" MDI child frame
 345     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 346     wndclass.style         = styleNoRedraw;
 347
 348     if ( !RegisterClass(&wndclass) )
 349     {
 350         wxLogLastError("RegisterClass(no redraw MDI child)");
 351
 352         return FALSE;
 353     }
 354
 355     // Register the panel window class.
 356     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 357     wndclass.lpszClassName = wxPanelClassName;
 358     wndclass.style         = styleNormal;
 359
 360     if ( !RegisterClass(&wndclass) )
 361     {
 362         wxLogLastError("RegisterClass(panel)");
 363
 364         return FALSE;
 365     }
 366
 367     // Register the canvas and textsubwindow class name
 368     wndclass.hbrBackground = (HBRUSH)NULL;
 369     wndclass.lpszClassName = wxCanvasClassName;
 370
 371     if ( !RegisterClass(&wndclass) )
 372     {
 373         wxLogLastError("RegisterClass(canvas)");
 374
 375         return FALSE;
 376     }
 377
 378     return TRUE;
 379 }
 380
 381 // ---------------------------------------------------------------------------
 382 // Convert Windows to argc, argv style
 383 // ---------------------------------------------------------------------------
 384
 385 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 386 {
 387     wxStringList args;
 388
 389     wxString cmdLine(lpCmdLine);
 390     int count = 0;
 391
 392     // Get application name
 393     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 394     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 395
 396     args.Add(name);
 397     count++;
 398
 399     wxStrcpy(name, wxFileNameFromPath(name));
 400     wxStripExtension(name);
 401     wxTheApp->SetAppName(name);
 402
 403     // Break up string
 404     // Treat strings enclosed in double-quotes as single arguments
 405     int i = 0;
 406     int len = cmdLine.Length();
 407     while (i < len)
 408     {
 409         // Skip whitespace
 410         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 411             i ++;
 412
 413         if (i < len)
 414         {
 415             if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
 416             {
 417                 i ++;
 418                 int first = i;
 419                 while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
 420                     i ++;
 421
 422                 wxString arg(cmdLine.Mid(first, (i - first)));
 423
 424                 args.Add(arg);
 425                 count ++;
 426
 427                 if (i < len)
 428                     i ++; // Skip past 2nd quote
 429             }
 430             else // Unquoted argument
 431             {
 432                 int first = i;
 433                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 434                     i ++;
 435
 436                 wxString arg(cmdLine.Mid(first, (i - first)));
 437
 438                 args.Add(arg);
 439                 count ++;
 440             }
 441         }
 442     }
 443
 444     wxTheApp->argv = new wxChar*[count + 1];
 445     for (i = 0; i < count; i++)
 446     {
 447         wxString arg(args[i]);
 448         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 449     }
 450     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 451     wxTheApp->argc = count;
 452 }
 453
 454 //// Cleans up any wxWindows internal structures left lying around
 455
 456 void wxApp::CleanUp()
 457 {
 458     //// COMMON CLEANUP
 459
 460 #if wxUSE_LOG
 461     // flush the logged messages if any and install a 'safer' log target: the
 462     // default one (wxLogGui) can't be used after the resources are freed just
 463     // below and the user suppliedo ne might be even more unsafe (using any
 464     // wxWindows GUI function is unsafe starting from now)
 465     wxLog::DontCreateOnDemand();
 466
 467     // this will flush the old messages if any
 468     delete wxLog::SetActiveTarget(new wxLogStderr);
 469 #endif // wxUSE_LOG
 470
 471     // One last chance for pending objects to be cleaned up
 472     wxTheApp->DeletePendingObjects();
 473
 474     wxModule::CleanUpModules();
 475
 476 #if wxUSE_WX_RESOURCES
 477     wxCleanUpResourceSystem();
 478
 479     //  wxDefaultResourceTable->ClearTable();
 480 #endif
 481
 482     // Indicate that the cursor can be freed, so that cursor won't be deleted
 483     // by deleting the bitmap list before g_globalCursor goes out of scope
 484     // (double deletion of the cursor).
 485     wxSetCursor(wxNullCursor);
 486     delete g_globalCursor;
 487     g_globalCursor = NULL;
 488
 489     wxDeleteStockObjects();
 490
 491     // Destroy all GDI lists, etc.
 492     wxDeleteStockLists();
 493
 494     delete wxTheColourDatabase;
 495     wxTheColourDatabase = NULL;
 496
 497     wxBitmap::CleanUpHandlers();
 498
 499     delete[] wxBuffer;
 500     wxBuffer = NULL;
 501
 502     //// WINDOWS-SPECIFIC CLEANUP
 503
 504     wxSetKeyboardHook(FALSE);
 505
 506 #if wxUSE_RICHEDIT
 507     if (gs_hRichEdit != (HINSTANCE) NULL)
 508         FreeLibrary(gs_hRichEdit);
 509 #endif
 510
 511 #if wxUSE_PENWINDOWS
 512     wxCleanUpPenWin();
 513 #endif
 514
 515     if (wxSTD_FRAME_ICON)
 516         DestroyIcon(wxSTD_FRAME_ICON);
 517     if (wxSTD_MDICHILDFRAME_ICON)
 518         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 519     if (wxSTD_MDIPARENTFRAME_ICON)
 520         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 521
 522     if (wxDEFAULT_FRAME_ICON)
 523         DestroyIcon(wxDEFAULT_FRAME_ICON);
 524     if (wxDEFAULT_MDICHILDFRAME_ICON)
 525         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 526     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 527         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 528
 529     if ( wxDisableButtonBrush )
 530         ::DeleteObject( wxDisableButtonBrush );
 531
 532 #if wxUSE_OLE
 533     ::OleUninitialize();
 534 #endif
 535
 536 #if wxUSE_CTL3D
 537     Ctl3dUnregister(wxhInstance);
 538 #endif
 539
 540     if (wxWinHandleList)
 541         delete wxWinHandleList;
 542
 543     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 544     // create a module for that as it's part of the core.
 545     delete wxPendingEvents;
 546 #if wxUSE_THREADS
 547     delete wxPendingEventsLocker;
 548     // If we don't do the following, we get an apparent memory leak.
 549     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 550 #endif
 551
 552     wxClassInfo::CleanUpClasses();
 553
 554     delete wxTheApp;
 555     wxTheApp = NULL;
 556
 557 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 558     // At this point we want to check if there are any memory
 559     // blocks that aren't part of the wxDebugContext itself,
 560     // as a special case. Then when dumping we need to ignore
 561     // wxDebugContext, too.
 562     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 563     {
 564         wxLogDebug(wxT("There were memory leaks."));
 565         wxDebugContext::Dump();
 566         wxDebugContext::PrintStatistics();
 567     }
 568     //  wxDebugContext::SetStream(NULL, NULL);
 569 #endif
 570
 571 #if wxUSE_LOG
 572     // do it as the very last thing because everything else can log messages
 573     delete wxLog::SetActiveTarget(NULL);
 574 #endif // wxUSE_LOG
 575 }
 576
 577 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 578
 579 // temporarily disable this warning which would be generated in release builds
 580 // because of __try
 581 #ifdef __VISUALC__
 582     #pragma warning(disable: 4715) // not all control paths return a value
 583 #endif // Visual C++
 584
 585 //// Main wxWindows entry point
 586 int wxEntry(WXHINSTANCE hInstance,
 587             WXHINSTANCE WXUNUSED(hPrevInstance),
 588             char *lpCmdLine,
 589             int nCmdShow,
 590             bool enterLoop)
 591 {
 592     // do check for memory leaks on program exit
 593     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 594     //  deallocated memory which may be used to simulate low-memory condition)
 595     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 596
 597     // take everything into a try-except block in release build
 598     // FIXME other compilers must support Win32 SEH (structured exception
 599     //       handling) too, just find the appropriate keyword in their docs!
 600     //       Please note that it's _not_ the same as C++ exceptions!
 601 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 602     #define CATCH_PROGRAM_EXCEPTIONS
 603
 604     __try {
 605 #else
 606     #undef  CATCH_PROGRAM_EXCEPTIONS
 607 #endif
 608         wxhInstance = (HINSTANCE) hInstance;
 609
 610         if (!wxApp::Initialize())
 611             return 0;
 612
 613         // create the application object or ensure that one already exists
 614         if (!wxTheApp)
 615         {
 616             // The app may have declared a global application object, but we recommend
 617             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 618             // function for delayed, dynamic app object construction.
 619             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 620                          wxT("No initializer - use IMPLEMENT_APP macro.") );
 621
 622             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 623         }
 624
 625         wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
 626
 627         // save the WinMain() parameters
 628         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 629         wxTheApp->m_nCmdShow = nCmdShow;
 630
 631         // GUI-specific initialisation. In fact on Windows we don't have any,
 632         // but this call is provided for compatibility across platforms.
 633         wxTheApp->OnInitGui();
 634
 635         // We really don't want timestamps by default, because it means
 636         // we can't simply double-click on the error message and get to that
 637         // line in the source. So VC++ at least, let's have a sensible default.
 638 #ifdef __VISUALC__
 639         wxLog::SetTimestamp(NULL);
 640 #endif
 641
 642         int retValue = 0;
 643
 644         if ( wxTheApp->OnInit() )
 645         {
 646             if ( enterLoop )
 647             {
 648                 retValue = wxTheApp->OnRun();
 649             }
 650             else
 651                 // We want to initialize, but not run or exit immediately.
 652                 return 1;
 653         }
 654         //else: app initialization failed, so we skipped OnRun()
 655
 656         wxWindow *topWindow = wxTheApp->GetTopWindow();
 657         if ( topWindow )
 658         {
 659             // Forcibly delete the window.
 660             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 661                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 662             {
 663                 topWindow->Close(TRUE);
 664                 wxTheApp->DeletePendingObjects();
 665             }
 666             else
 667             {
 668                 delete topWindow;
 669                 wxTheApp->SetTopWindow(NULL);
 670             }
 671         }
 672
 673         wxTheApp->OnExit();
 674
 675         wxApp::CleanUp();
 676
 677         return retValue;
 678
 679 #ifdef CATCH_PROGRAM_EXCEPTIONS
 680     }
 681     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 682         /*
 683            if ( wxTheApp )
 684            wxTheApp->OnFatalException();
 685          */
 686
 687         // using wxLog would be unsafe here
 688         ::MessageBox(NULL,
 689                      _("Unrecoverable program error detected: "
 690                      " the application will terminate."),
 691                      _("Fatal Error"),
 692                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 693
 694         ::ExitProcess(3); // the same exit code as abort()
 695
 696         // NOTREACHED
 697     }
 698 #endif // CATCH_PROGRAM_EXCEPTIONS
 699 }
 700
 701 // restore warning state
 702 #ifdef __VISUALC__
 703     #pragma warning(default: 4715) // not all control paths return a value
 704 #endif // Visual C++
 705
 706 #else /*  _WINDLL  */
 707
 708 //// Entry point for DLLs
 709
 710 int wxEntry(WXHINSTANCE hInstance)
 711 {
 712     wxhInstance = (HINSTANCE) hInstance;
 713     wxApp::Initialize();
 714
 715     // The app may have declared a global application object, but we recommend
 716     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 717     // for delayed, dynamic app object construction.
 718     if (!wxTheApp)
 719     {
 720         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 721                      "No initializer - use IMPLEMENT_APP macro." );
 722
 723         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 724     }
 725
 726     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 727
 728     wxTheApp->argc = 0;
 729     wxTheApp->argv = NULL;
 730
 731     wxTheApp->OnInitGui();
 732
 733     wxTheApp->OnInit();
 734
 735     wxWindow *topWindow = wxTheApp->GetTopWindow();
 736     if ( topWindow && topWindow->GetHWND())
 737     {
 738         topWindow->Show(TRUE);
 739     }
 740
 741     return 1;
 742 }
 743 #endif // _WINDLL
 744
 745 //// Static member initialization
 746
 747 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 748
 749 wxApp::wxApp()
 750 {
 751     m_topWindow = NULL;
 752     wxTheApp = this;
 753     m_wantDebugOutput = TRUE;
 754
 755     argc = 0;
 756     argv = NULL;
 757     m_printMode = wxPRINT_WINDOWS;
 758     m_exitOnFrameDelete = TRUE;
 759     m_auto3D = TRUE;
 760 }
 761
 762 wxApp::~wxApp()
 763 {
 764     // Delete command-line args
 765     int i;
 766     for (i = 0; i < argc; i++)
 767     {
 768         delete[] argv[i];
 769     }
 770     delete[] argv;
 771 }
 772
 773 bool wxApp::Initialized()
 774 {
 775 #ifndef _WINDLL
 776     if (GetTopWindow())
 777         return TRUE;
 778     else
 779         return FALSE;
 780 #endif
 781 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 782     return TRUE;
 783 #endif
 784 }
 785
 786 /*
 787  * Get and process a message, returning FALSE if WM_QUIT
 788  * received (and also set the flag telling the app to exit the main loop)
 789  *
 790  */
 791 bool wxApp::DoMessage()
 792 {
 793     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 794     if ( rc == 0 )
 795     {
 796         // got WM_QUIT
 797         m_keepGoing = FALSE;
 798
 799         return FALSE;
 800     }
 801     else if ( rc == -1 )
 802     {
 803         // should never happen, but let's test for it nevertheless
 804         wxLogLastError("GetMessage");
 805     }
 806     else
 807     {
 808 #if wxUSE_THREADS
 809         wxASSERT_MSG( wxThread::IsMain(),
 810                       wxT("only the main thread can process Windows messages") );
 811
 812         static bool s_hadGuiLock = TRUE;
 813         static wxMsgArray s_aSavedMessages;
 814
 815         // if a secondary thread owns is doing GUI calls, save all messages for
 816         // later processing - we can't process them right now because it will
 817         // lead to recursive library calls (and we're not reentrant)
 818         if ( !wxGuiOwnedByMainThread() )
 819         {
 820             s_hadGuiLock = FALSE;
 821
 822             // leave out WM_COMMAND messages: too dangerous, sometimes
 823             // the message will be processed twice
 824             if ( !wxIsWaitingForThread() ||
 825                     s_currentMsg.message != WM_COMMAND )
 826             {
 827                 s_aSavedMessages.Add(s_currentMsg);
 828             }
 829
 830             return TRUE;
 831         }
 832         else
 833         {
 834             // have we just regained the GUI lock? if so, post all of the saved
 835             // messages
 836             //
 837             // FIXME of course, it's not _exactly_ the same as processing the
 838             //       messages normally - expect some things to break...
 839             if ( !s_hadGuiLock )
 840             {
 841                 s_hadGuiLock = TRUE;
 842
 843                 size_t count = s_aSavedMessages.Count();
 844                 for ( size_t n = 0; n < count; n++ )
 845                 {
 846                     MSG& msg = s_aSavedMessages[n];
 847
 848                     if ( !ProcessMessage((WXMSG *)&msg) )
 849                     {
 850                         ::TranslateMessage(&msg);
 851                         ::DispatchMessage(&msg);
 852                     }
 853                 }
 854
 855                 s_aSavedMessages.Empty();
 856             }
 857         }
 858 #endif // wxUSE_THREADS
 859
 860         // Process the message
 861         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 862         {
 863             ::TranslateMessage(&s_currentMsg);
 864             ::DispatchMessage(&s_currentMsg);
 865         }
 866     }
 867
 868     return TRUE;
 869 }
 870
 871 /*
 872  * Keep trying to process messages until WM_QUIT
 873  * received.
 874  *
 875  * If there are messages to be processed, they will all be
 876  * processed and OnIdle will not be called.
 877  * When there are no more messages, OnIdle is called.
 878  * If OnIdle requests more time,
 879  * it will be repeatedly called so long as there are no pending messages.
 880  * A 'feature' of this is that once OnIdle has decided that no more processing
 881  * is required, then it won't get processing time until further messages
 882  * are processed (it'll sit in DoMessage).
 883  */
 884
 885 int wxApp::MainLoop()
 886 {
 887     m_keepGoing = TRUE;
 888
 889     while ( m_keepGoing )
 890     {
 891 #if wxUSE_THREADS
 892         wxMutexGuiLeaveOrEnter();
 893 #endif // wxUSE_THREADS
 894
 895         while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 896                 ProcessIdle() )
 897         {
 898         }
 899
 900
 901         DoMessage();
 902     }
 903
 904     return s_currentMsg.wParam;
 905 }
 906
 907 // Returns TRUE if more time is needed.
 908 bool wxApp::ProcessIdle()
 909 {
 910     wxIdleEvent event;
 911     event.SetEventObject(this);
 912     ProcessEvent(event);
 913
 914     return event.MoreRequested();
 915 }
 916
 917 void wxApp::ExitMainLoop()
 918 {
 919     m_keepGoing = FALSE;
 920 }
 921
 922 bool wxApp::Pending()
 923 {
 924     return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0);
 925 }
 926
 927 void wxApp::Dispatch()
 928 {
 929     DoMessage();
 930 }
 931
 932 /*
 933  * Give all windows a chance to preprocess
 934  * the message. Some may have accelerator tables, or have
 935  * MDI complications.
 936  */
 937
 938 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 939 {
 940     MSG *msg = (MSG *)wxmsg;
 941     HWND hWnd = msg->hwnd;
 942     wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
 943
 944     // for some composite controls (like a combobox), wndThis might be NULL
 945     // because the subcontrol is not a wxWindow, but only the control itself
 946     // is - try to catch this case
 947     while ( hWnd && !wndThis )
 948     {
 949         hWnd = ::GetParent(hWnd);
 950         wndThis = wxFindWinFromHandle((WXHWND)hWnd);
 951     }
 952
 953     // Try translations first; find the youngest window with
 954     // a translation table.
 955     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 956     {
 957         if ( wnd->MSWTranslateMessage(wxmsg) )
 958             return TRUE;
 959     }
 960
 961     // Anyone for a non-translation message? Try youngest descendants first.
 962     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 963     {
 964         if ( wnd->MSWProcessMessage(wxmsg) )
 965             return TRUE;
 966     }
 967
 968     return FALSE;
 969 }
 970
 971 void wxApp::OnIdle(wxIdleEvent& event)
 972 {
 973     static bool s_inOnIdle = FALSE;
 974
 975     // Avoid recursion (via ProcessEvent default case)
 976     if ( s_inOnIdle )
 977         return;
 978
 979     s_inOnIdle = TRUE;
 980
 981     // 'Garbage' collection of windows deleted with Close().
 982     DeletePendingObjects();
 983
 984 #if wxUSE_LOG
 985     // flush the logged messages if any
 986     wxLog *pLog = wxLog::GetActiveTarget();
 987     if ( pLog != NULL && pLog->HasPendingMessages() )
 988         pLog->Flush();
 989 #endif // wxUSE_LOG
 990
 991     // Send OnIdle events to all windows
 992     if ( SendIdleEvents() )
 993     {
 994         // SendIdleEvents() returns TRUE if at least one window requested more
 995         // idle events
 996         event.RequestMore(TRUE);
 997     }
 998
 999     // If they are pending events, we must process them: pending events are
1000     // either events to the threads other than main or events posted with
1001     // wxPostEvent() functions
1002     ProcessPendingEvents();
1003
1004     s_inOnIdle = FALSE;
1005 }
1006
1007 // Send idle event to all top-level windows
1008 bool wxApp::SendIdleEvents()
1009 {
1010     bool needMore = FALSE;
1011
1012     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1013     while (node)
1014     {
1015         wxWindow* win = node->GetData();
1016         if (SendIdleEvents(win))
1017             needMore = TRUE;
1018         node = node->GetNext();
1019     }
1020
1021     return needMore;
1022 }
1023
1024 // Send idle event to window and all subwindows
1025 bool wxApp::SendIdleEvents(wxWindow* win)
1026 {
1027     bool needMore = FALSE;
1028
1029     wxIdleEvent event;
1030     event.SetEventObject(win);
1031     win->GetEventHandler()->ProcessEvent(event);
1032
1033     if (event.MoreRequested())
1034         needMore = TRUE;
1035
1036     wxNode* node = win->GetChildren().First();
1037     while (node)
1038     {
1039         wxWindow* win = (wxWindow*) node->Data();
1040         if (SendIdleEvents(win))
1041             needMore = TRUE;
1042
1043         node = node->Next();
1044     }
1045     return needMore;
1046 }
1047
1048 void wxApp::DeletePendingObjects()
1049 {
1050     wxNode *node = wxPendingDelete.First();
1051     while (node)
1052     {
1053         wxObject *obj = (wxObject *)node->Data();
1054
1055         delete obj;
1056
1057         if (wxPendingDelete.Member(obj))
1058             delete node;
1059
1060         // Deleting one object may have deleted other pending
1061         // objects, so start from beginning of list again.
1062         node = wxPendingDelete.First();
1063     }
1064 }
1065
1066 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1067 {
1068     if (GetTopWindow())
1069         GetTopWindow()->Close(TRUE);
1070 }
1071
1072 // Default behaviour: close the application with prompts. The
1073 // user can veto the close, and therefore the end session.
1074 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1075 {
1076     if (GetTopWindow())
1077     {
1078         if (!GetTopWindow()->Close(!event.CanVeto()))
1079             event.Veto(TRUE);
1080     }
1081 }
1082
1083 #if wxUSE_RICHEDIT
1084
1085 /* static */
1086 bool wxApp::InitRichEdit(int version)
1087 {
1088     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1089                  _T("incorrect richedit control version requested") );
1090
1091     if ( version <= gs_verRichEdit )
1092     {
1093         // we've already got this or better
1094         return TRUE;
1095     }
1096
1097     if ( gs_hRichEdit )
1098     {
1099         ::FreeLibrary(gs_hRichEdit);
1100     }
1101
1102     // always try load riched20.dll first - like this we won't have to reload
1103     // it later if we're first asked for RE 1 and then for RE 2 or 3
1104     wxString dllname = _T("riched20.dll");
1105     gs_hRichEdit = ::LoadLibrary(dllname);
1106     if ( !gs_hRichEdit && (version == 1) )
1107     {
1108         // fall back to RE 1
1109         dllname = _T("riched32.dll");
1110         gs_hRichEdit = ::LoadLibrary(dllname);
1111     }
1112
1113     if ( !gs_hRichEdit )
1114     {
1115         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1116
1117         gs_verRichEdit = -1;
1118
1119         return FALSE;
1120     }
1121
1122     gs_verRichEdit = version;
1123
1124     return TRUE;
1125 }
1126
1127 #endif // wxUSE_RICHEDIT
1128
1129 /* static */
1130 int wxApp::GetComCtl32Version()
1131 {
1132     // TODO should use DllGetVersion() instead of this hack
1133
1134     // cache the result
1135     static int s_verComCtl32 = -1;      // MT-FIXME
1136
1137     if ( s_verComCtl32 == -1 )
1138     {
1139         s_verComCtl32 = 0;
1140
1141         // have we loaded COMCTL32 yet?
1142         HMODULE theModule = ::GetModuleHandle(wxT("COMCTL32"));
1143
1144         // if so, then we can check for the version
1145         if (theModule)
1146         {
1147             // InitCommonControlsEx is unique to 4.7 and later
1148             FARPROC theProc = ::GetProcAddress(theModule,
1149                                                _T("InitCommonControlsEx"));
1150
1151             if ( !theProc )
1152             {                    // not found, must be 4.00
1153                 s_verComCtl32 = 400;
1154             }
1155             else
1156             {
1157                 // The following symbol are unique to 4.71
1158                 //   DllInstall
1159                 //   FlatSB_EnableScrollBar FlatSB_GetScrollInfo FlatSB_GetScrollPos
1160                 //   FlatSB_GetScrollProp FlatSB_GetScrollRange FlatSB_SetScrollInfo
1161                 //   FlatSB_SetScrollPos FlatSB_SetScrollProp FlatSB_SetScrollRange
1162                 //   FlatSB_ShowScrollBar
1163                 //   _DrawIndirectImageList _DuplicateImageList
1164                 //   InitializeFlatSB
1165                 //   UninitializeFlatSB
1166                 // we could check for any of these - I chose DllInstall
1167                 FARPROC theProc = ::GetProcAddress(theModule, _T("DllInstall"));
1168                 if ( !theProc )
1169                 {
1170                     // not found, must be 4.70
1171                     s_verComCtl32 = 470;
1172                 }
1173                 else
1174                 {                         // found, must be 4.71
1175                     s_verComCtl32 = 471;
1176                 }
1177             }
1178         }
1179     }
1180
1181     return s_verComCtl32;
1182 }
1183
1184 void wxExit()
1185 {
1186     wxLogError(_("Fatal error: exiting"));
1187
1188     wxApp::CleanUp();
1189 }
1190
1191 // Yield to incoming messages
1192 bool wxYield()
1193 {
1194     // we don't want to process WM_QUIT from here - it should be processed in
1195     // the main event loop in order to stop it
1196
1197     MSG msg;
1198     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
1199             msg.message != WM_QUIT )
1200     {
1201         if ( !wxTheApp->DoMessage() )
1202             break;
1203     }
1204
1205     // If they are pending events, we must process them.
1206     wxTheApp->ProcessPendingEvents();
1207
1208     return TRUE;
1209 }
1210
1211 //-----------------------------------------------------------------------------
1212 // wxWakeUpIdle
1213 //-----------------------------------------------------------------------------
1214
1215 void wxWakeUpIdle()
1216 {
1217     // Send the top window a dummy message so idle handler processing will
1218     // start up again.  Doing it this way ensures that the idle handler
1219     // wakes up in the right thread (see also wxWakeUpMainThread() which does
1220     // the same for the main app thread only)
1221     wxWindow *topWindow = wxTheApp->GetTopWindow();
1222     if ( topWindow )
1223     {
1224         if ( !::PostMessage(GetHwndOf(topWindow), WM_NULL, 0, 0) )
1225         {
1226             // should never happen
1227             wxLogLastError("PostMessage(WM_NULL)");
1228         }
1229     }
1230 }
1231
1232 //-----------------------------------------------------------------------------
1233
1234 wxIcon
1235 wxApp::GetStdIcon(int which) const
1236 {
1237     switch(which)
1238     {
1239         case wxICON_INFORMATION:
1240             return wxIcon("wxICON_INFO");
1241
1242         case wxICON_QUESTION:
1243             return wxIcon("wxICON_QUESTION");
1244
1245         case wxICON_EXCLAMATION:
1246             return wxIcon("wxICON_WARNING");
1247
1248         default:
1249             wxFAIL_MSG(wxT("requested non existent standard icon"));
1250             // still fall through
1251
1252         case wxICON_HAND:
1253             return wxIcon("wxICON_ERROR");
1254     }
1255 }
1256
1257 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1258 // if in a separate file. So include it here to ensure it's linked.
1259 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
1260 #include "main.cpp"
1261 #endif