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 HINSTANCE wxhInstance = 0;
 104 MSG s_currentMsg;
 105 wxApp *wxTheApp = NULL;
 106
 107 // FIXME why not const? and not static?
 108
 109 // NB: all "NoRedraw" classes must have the same names as the "normal" classes
 110 //     with NR suffix - wxWindow::MSWCreate() supposes this
 111 wxChar wxFrameClassName[]         = wxT("wxFrameClass");
 112 wxChar wxFrameClassNameNoRedraw[] = wxT("wxFrameClassNR");
 113 wxChar wxMDIFrameClassName[]      = wxT("wxMDIFrameClass");
 114 wxChar wxMDIFrameClassNameNoRedraw[] = wxT("wxMDIFrameClassNR");
 115 wxChar wxMDIChildFrameClassName[] = wxT("wxMDIChildFrameClass");
 116 wxChar wxMDIChildFrameClassNameNoRedraw[] = wxT("wxMDIChildFrameClassNR");
 117 wxChar wxPanelClassName[]         = wxT("wxPanelClass");
 118 wxChar wxCanvasClassName[]        = wxT("wxCanvasClass");
 119
 120 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 121 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 122 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 123
 124 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 125 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 126 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 127
 128 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 129
 130 LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 131
 132 #if wxUSE_RICHEDIT
 133     // the handle to richedit DLL and the version of the DLL loaded
 134     static HINSTANCE gs_hRichEdit = (HINSTANCE)NULL;
 135     static int gs_verRichEdit = -1;
 136 #endif
 137
 138 // ===========================================================================
 139 // implementation
 140 // ===========================================================================
 141
 142 // ---------------------------------------------------------------------------
 143 // wxApp
 144 // ---------------------------------------------------------------------------
 145
 146 #if !USE_SHARED_LIBRARY
 147     IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 148
 149     BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 150         EVT_IDLE(wxApp::OnIdle)
 151         EVT_END_SESSION(wxApp::OnEndSession)
 152         EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 153     END_EVENT_TABLE()
 154 #endif
 155
 156 //// Initialize
 157 bool wxApp::Initialize()
 158 {
 159     // Some people may wish to use this, but
 160     // probably it shouldn't be here by default.
 161 #ifdef __WXDEBUG__
 162     //    wxRedirectIOToConsole();
 163 #endif
 164
 165     wxBuffer = new wxChar[1500]; // FIXME
 166
 167     wxClassInfo::InitializeClasses();
 168
 169 #if wxUSE_RESOURCES
 170     wxGetResource(wxT("wxWindows"), wxT("OsVersion"), &wxOsVersion);
 171 #endif
 172
 173 #if wxUSE_THREADS
 174     wxPendingEventsLocker = new wxCriticalSection;
 175 #endif
 176
 177     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 178     wxTheColourDatabase->Initialize();
 179
 180     wxInitializeStockLists();
 181     wxInitializeStockObjects();
 182
 183 #if wxUSE_WX_RESOURCES
 184     wxInitializeResourceSystem();
 185 #endif
 186
 187     wxBitmap::InitStandardHandlers();
 188
 189 #if defined(__WIN95__)
 190     InitCommonControls();
 191
 192 #endif // __WIN95__
 193
 194 #if wxUSE_OLE
 195
 196 #ifdef __WIN16__
 197     // for OLE, enlarge message queue to be as large as possible
 198     int iMsg = 96;
 199     while (!SetMessageQueue(iMsg) && (iMsg -= 8))
 200         ;
 201 #endif // Win16
 202     // we need to initialize OLE library
 203     if ( FAILED(::OleInitialize(NULL)) )
 204         wxLogError(_("Cannot initialize OLE"));
 205 #endif // wxUSE_OLE
 206
 207 #if wxUSE_CTL3D
 208     if (!Ctl3dRegister(wxhInstance))
 209         wxLogError(wxT("Cannot register CTL3D"));
 210
 211     Ctl3dAutoSubclass(wxhInstance);
 212 #endif
 213
 214     g_globalCursor = new wxCursor;
 215
 216     // VZ: these icons are not in wx.rc anyhow (but should they?)!
 217 #if 0
 218     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
 219     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
 220     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
 221
 222     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
 223     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
 224     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDICHILDFRAME"));
 225 #endif // 0
 226
 227     RegisterWindowClasses();
 228
 229     // Create the brush for disabling bitmap buttons
 230
 231     LOGBRUSH lb;
 232     lb.lbStyle = BS_PATTERN;
 233     lb.lbHatch = (int)LoadBitmap( wxhInstance, wxT("wxDISABLE_BUTTON_BITMAP") );
 234     if ( lb.lbHatch )
 235     {
 236         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 237         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 238     }
 239     //else: wxWindows resources are probably not linked in
 240
 241 #if wxUSE_PENWINDOWS
 242     wxRegisterPenWin();
 243 #endif
 244
 245     wxWinHandleList = new wxList(wxKEY_INTEGER);
 246
 247     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 248     // PLEASE DO NOT ALTER THIS.
 249 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 250     extern char wxDummyChar;
 251     if (wxDummyChar) wxDummyChar++;
 252 #endif
 253
 254     wxSetKeyboardHook(TRUE);
 255
 256     wxModule::RegisterModules();
 257     if (!wxModule::InitializeModules())
 258         return FALSE;
 259     return TRUE;
 260 }
 261
 262 // ---------------------------------------------------------------------------
 263 // RegisterWindowClasses
 264 // ---------------------------------------------------------------------------
 265
 266 // TODO we should only register classes really used by the app. For this it
 267 //      would be enough to just delay the class registration until an attempt
 268 //      to create a window of this class is made.
 269 bool wxApp::RegisterWindowClasses()
 270 {
 271     WNDCLASS wndclass;
 272
 273     // for each class we register one with CS_(V|H)REDRAW style and one
 274     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 275     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 276     static const long styleNoRedraw = CS_DBLCLKS;
 277
 278     // the fields which are common to all classes
 279     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 280     wndclass.cbClsExtra    = 0;
 281     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 282     wndclass.hInstance     = wxhInstance;
 283     wndclass.hIcon         = (HICON) NULL;
 284     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 285     wndclass.lpszMenuName  = NULL;
 286
 287     // Register the frame window class.
 288     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 289     wndclass.lpszClassName = wxFrameClassName;
 290     wndclass.style         = styleNormal;
 291
 292     if ( !RegisterClass(&wndclass) )
 293     {
 294         wxLogLastError("RegisterClass(frame)");
 295
 296         return FALSE;
 297     }
 298
 299     // "no redraw" frame
 300     wndclass.lpszClassName = wxFrameClassNameNoRedraw;
 301     wndclass.style         = styleNoRedraw;
 302
 303     if ( !RegisterClass(&wndclass) )
 304     {
 305         wxLogLastError("RegisterClass(no redraw frame)");
 306
 307         return FALSE;
 308     }
 309
 310     // Register the MDI frame window class.
 311     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 312     wndclass.lpszClassName = wxMDIFrameClassName;
 313     wndclass.style         = styleNormal;
 314
 315     if ( !RegisterClass(&wndclass) )
 316     {
 317         wxLogLastError("RegisterClass(MDI parent)");
 318
 319         return FALSE;
 320     }
 321
 322     // "no redraw" MDI frame
 323     wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
 324     wndclass.style         = styleNoRedraw;
 325
 326     if ( !RegisterClass(&wndclass) )
 327     {
 328         wxLogLastError("RegisterClass(no redraw MDI parent frame)");
 329
 330         return FALSE;
 331     }
 332
 333     // Register the MDI child frame window class.
 334     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 335     wndclass.lpszClassName = wxMDIChildFrameClassName;
 336     wndclass.style         = styleNormal;
 337
 338     if ( !RegisterClass(&wndclass) )
 339     {
 340         wxLogLastError("RegisterClass(MDI child)");
 341
 342         return FALSE;
 343     }
 344
 345     // "no redraw" MDI child frame
 346     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 347     wndclass.style         = styleNoRedraw;
 348
 349     if ( !RegisterClass(&wndclass) )
 350     {
 351         wxLogLastError("RegisterClass(no redraw MDI child)");
 352
 353         return FALSE;
 354     }
 355
 356     // Register the panel window class.
 357     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 358     wndclass.lpszClassName = wxPanelClassName;
 359     wndclass.style         = styleNormal;
 360
 361     if ( !RegisterClass(&wndclass) )
 362     {
 363         wxLogLastError("RegisterClass(panel)");
 364
 365         return FALSE;
 366     }
 367
 368     // Register the canvas and textsubwindow class name
 369     wndclass.hbrBackground = (HBRUSH)NULL;
 370     wndclass.lpszClassName = wxCanvasClassName;
 371
 372     if ( !RegisterClass(&wndclass) )
 373     {
 374         wxLogLastError("RegisterClass(canvas)");
 375
 376         return FALSE;
 377     }
 378
 379     return TRUE;
 380 }
 381
 382 // ---------------------------------------------------------------------------
 383 // Convert Windows to argc, argv style
 384 // ---------------------------------------------------------------------------
 385
 386 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 387 {
 388     wxStringList args;
 389
 390     wxString cmdLine(lpCmdLine);
 391     int count = 0;
 392
 393     // Get application name
 394     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 395     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 396
 397     args.Add(name);
 398     count++;
 399
 400     wxStrcpy(name, wxFileNameFromPath(name));
 401     wxStripExtension(name);
 402     wxTheApp->SetAppName(name);
 403
 404     // Break up string
 405     // Treat strings enclosed in double-quotes as single arguments
 406     int i = 0;
 407     int len = cmdLine.Length();
 408     while (i < len)
 409     {
 410         // Skip whitespace
 411         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 412             i ++;
 413
 414         if (i < len)
 415         {
 416             if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
 417             {
 418                 i ++;
 419                 int first = i;
 420                 while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
 421                     i ++;
 422
 423                 wxString arg(cmdLine.Mid(first, (i - first)));
 424
 425                 args.Add(arg);
 426                 count ++;
 427
 428                 if (i < len)
 429                     i ++; // Skip past 2nd quote
 430             }
 431             else // Unquoted argument
 432             {
 433                 int first = i;
 434                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 435                     i ++;
 436
 437                 wxString arg(cmdLine.Mid(first, (i - first)));
 438
 439                 args.Add(arg);
 440                 count ++;
 441             }
 442         }
 443     }
 444
 445     wxTheApp->argv = new wxChar*[count + 1];
 446     for (i = 0; i < count; i++)
 447     {
 448         wxString arg(args[i]);
 449         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 450     }
 451     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 452     wxTheApp->argc = count;
 453 }
 454
 455 //// Cleans up any wxWindows internal structures left lying around
 456
 457 void wxApp::CleanUp()
 458 {
 459     //// COMMON CLEANUP
 460
 461 #if wxUSE_LOG
 462     // flush the logged messages if any and install a 'safer' log target: the
 463     // default one (wxLogGui) can't be used after the resources are freed just
 464     // below and the user suppliedo ne might be even more unsafe (using any
 465     // wxWindows GUI function is unsafe starting from now)
 466     wxLog::DontCreateOnDemand();
 467
 468     // this will flush the old messages if any
 469     delete wxLog::SetActiveTarget(new wxLogStderr);
 470 #endif // wxUSE_LOG
 471
 472     // One last chance for pending objects to be cleaned up
 473     wxTheApp->DeletePendingObjects();
 474
 475     wxModule::CleanUpModules();
 476
 477 #if wxUSE_WX_RESOURCES
 478     wxCleanUpResourceSystem();
 479
 480     //  wxDefaultResourceTable->ClearTable();
 481 #endif
 482
 483     // Indicate that the cursor can be freed, so that cursor won't be deleted
 484     // by deleting the bitmap list before g_globalCursor goes out of scope
 485     // (double deletion of the cursor).
 486     wxSetCursor(wxNullCursor);
 487     delete g_globalCursor;
 488     g_globalCursor = NULL;
 489
 490     wxDeleteStockObjects();
 491
 492     // Destroy all GDI lists, etc.
 493     wxDeleteStockLists();
 494
 495     delete wxTheColourDatabase;
 496     wxTheColourDatabase = NULL;
 497
 498     wxBitmap::CleanUpHandlers();
 499
 500     delete[] wxBuffer;
 501     wxBuffer = NULL;
 502
 503     //// WINDOWS-SPECIFIC CLEANUP
 504
 505     wxSetKeyboardHook(FALSE);
 506
 507 #if wxUSE_RICHEDIT
 508     if (gs_hRichEdit != (HINSTANCE) NULL)
 509         FreeLibrary(gs_hRichEdit);
 510 #endif
 511
 512 #if wxUSE_PENWINDOWS
 513     wxCleanUpPenWin();
 514 #endif
 515
 516     if (wxSTD_FRAME_ICON)
 517         DestroyIcon(wxSTD_FRAME_ICON);
 518     if (wxSTD_MDICHILDFRAME_ICON)
 519         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 520     if (wxSTD_MDIPARENTFRAME_ICON)
 521         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 522
 523     if (wxDEFAULT_FRAME_ICON)
 524         DestroyIcon(wxDEFAULT_FRAME_ICON);
 525     if (wxDEFAULT_MDICHILDFRAME_ICON)
 526         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 527     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 528         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 529
 530     if ( wxDisableButtonBrush )
 531         ::DeleteObject( wxDisableButtonBrush );
 532
 533 #if wxUSE_OLE
 534     ::OleUninitialize();
 535 #endif
 536
 537 #if wxUSE_CTL3D
 538     Ctl3dUnregister(wxhInstance);
 539 #endif
 540
 541     if (wxWinHandleList)
 542         delete wxWinHandleList;
 543
 544     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 545     // create a module for that as it's part of the core.
 546     delete wxPendingEvents;
 547 #if wxUSE_THREADS
 548     delete wxPendingEventsLocker;
 549     // If we don't do the following, we get an apparent memory leak.
 550     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 551 #endif
 552
 553     wxClassInfo::CleanUpClasses();
 554
 555     delete wxTheApp;
 556     wxTheApp = NULL;
 557
 558 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 559     // At this point we want to check if there are any memory
 560     // blocks that aren't part of the wxDebugContext itself,
 561     // as a special case. Then when dumping we need to ignore
 562     // wxDebugContext, too.
 563     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 564     {
 565         wxLogDebug(wxT("There were memory leaks."));
 566         wxDebugContext::Dump();
 567         wxDebugContext::PrintStatistics();
 568     }
 569     //  wxDebugContext::SetStream(NULL, NULL);
 570 #endif
 571
 572 #if wxUSE_LOG
 573     // do it as the very last thing because everything else can log messages
 574     delete wxLog::SetActiveTarget(NULL);
 575 #endif // wxUSE_LOG
 576 }
 577
 578 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 579
 580 // temporarily disable this warning which would be generated in release builds
 581 // because of __try
 582 #ifdef __VISUALC__
 583     #pragma warning(disable: 4715) // not all control paths return a value
 584 #endif // Visual C++
 585
 586 //// Main wxWindows entry point
 587 int wxEntry(WXHINSTANCE hInstance,
 588             WXHINSTANCE WXUNUSED(hPrevInstance),
 589             char *lpCmdLine,
 590             int nCmdShow,
 591             bool enterLoop)
 592 {
 593     // do check for memory leaks on program exit
 594     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 595     //  deallocated memory which may be used to simulate low-memory condition)
 596     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 597
 598     // take everything into a try-except block in release build
 599     // FIXME other compilers must support Win32 SEH (structured exception
 600     //       handling) too, just find the appropriate keyword in their docs!
 601     //       Please note that it's _not_ the same as C++ exceptions!
 602 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 603     #define CATCH_PROGRAM_EXCEPTIONS
 604
 605     __try {
 606 #else
 607     #undef  CATCH_PROGRAM_EXCEPTIONS
 608 #endif
 609         wxhInstance = (HINSTANCE) hInstance;
 610
 611         if (!wxApp::Initialize())
 612             return 0;
 613
 614         // create the application object or ensure that one already exists
 615         if (!wxTheApp)
 616         {
 617             // The app may have declared a global application object, but we recommend
 618             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 619             // function for delayed, dynamic app object construction.
 620             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 621                          wxT("No initializer - use IMPLEMENT_APP macro.") );
 622
 623             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 624         }
 625
 626         wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
 627
 628         // save the WinMain() parameters
 629         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 630         wxTheApp->m_nCmdShow = nCmdShow;
 631
 632         // GUI-specific initialisation. In fact on Windows we don't have any,
 633         // but this call is provided for compatibility across platforms.
 634         wxTheApp->OnInitGui();
 635
 636         // We really don't want timestamps by default, because it means
 637         // we can't simply double-click on the error message and get to that
 638         // line in the source. So VC++ at least, let's have a sensible default.
 639 #ifdef __VISUALC__
 640         wxLog::SetTimestamp(NULL);
 641 #endif
 642
 643         int retValue = 0;
 644
 645         if ( wxTheApp->OnInit() )
 646         {
 647             if ( enterLoop )
 648             {
 649                 retValue = wxTheApp->OnRun();
 650             }
 651             else
 652                 // We want to initialize, but not run or exit immediately.
 653                 return 1;
 654         }
 655         //else: app initialization failed, so we skipped OnRun()
 656
 657         wxWindow *topWindow = wxTheApp->GetTopWindow();
 658         if ( topWindow )
 659         {
 660             // Forcibly delete the window.
 661             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 662                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 663             {
 664                 topWindow->Close(TRUE);
 665                 wxTheApp->DeletePendingObjects();
 666             }
 667             else
 668             {
 669                 delete topWindow;
 670                 wxTheApp->SetTopWindow(NULL);
 671             }
 672         }
 673
 674         wxTheApp->OnExit();
 675
 676         wxApp::CleanUp();
 677
 678         return retValue;
 679
 680 #ifdef CATCH_PROGRAM_EXCEPTIONS
 681     }
 682     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 683         /*
 684            if ( wxTheApp )
 685            wxTheApp->OnFatalException();
 686          */
 687
 688         // using wxLog would be unsafe here
 689         ::MessageBox(NULL,
 690                      _("Unrecoverable program error detected: "
 691                      " the application will terminate."),
 692                      _("Fatal Error"),
 693                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 694
 695         ::ExitProcess(3); // the same exit code as abort()
 696
 697         // NOTREACHED
 698     }
 699 #endif // CATCH_PROGRAM_EXCEPTIONS
 700 }
 701
 702 // restore warning state
 703 #ifdef __VISUALC__
 704     #pragma warning(default: 4715) // not all control paths return a value
 705 #endif // Visual C++
 706
 707 #else /*  _WINDLL  */
 708
 709 //// Entry point for DLLs
 710
 711 int wxEntry(WXHINSTANCE hInstance)
 712 {
 713     wxhInstance = (HINSTANCE) hInstance;
 714     wxApp::Initialize();
 715
 716     // The app may have declared a global application object, but we recommend
 717     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 718     // for delayed, dynamic app object construction.
 719     if (!wxTheApp)
 720     {
 721         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 722                      "No initializer - use IMPLEMENT_APP macro." );
 723
 724         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 725     }
 726
 727     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 728
 729     wxTheApp->argc = 0;
 730     wxTheApp->argv = NULL;
 731
 732     wxTheApp->OnInitGui();
 733
 734     wxTheApp->OnInit();
 735
 736     wxWindow *topWindow = wxTheApp->GetTopWindow();
 737     if ( topWindow && topWindow->GetHWND())
 738     {
 739         topWindow->Show(TRUE);
 740     }
 741
 742     return 1;
 743 }
 744 #endif // _WINDLL
 745
 746 //// Static member initialization
 747
 748 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 749
 750 wxApp::wxApp()
 751 {
 752     m_topWindow = NULL;
 753     wxTheApp = this;
 754     m_wantDebugOutput = TRUE;
 755
 756     argc = 0;
 757     argv = NULL;
 758     m_printMode = wxPRINT_WINDOWS;
 759     m_exitOnFrameDelete = TRUE;
 760     m_auto3D = TRUE;
 761 }
 762
 763 wxApp::~wxApp()
 764 {
 765     // Delete command-line args
 766     int i;
 767     for (i = 0; i < argc; i++)
 768     {
 769         delete[] argv[i];
 770     }
 771     delete[] argv;
 772 }
 773
 774 bool wxApp::Initialized()
 775 {
 776 #ifndef _WINDLL
 777     if (GetTopWindow())
 778         return TRUE;
 779     else
 780         return FALSE;
 781 #endif
 782 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 783     return TRUE;
 784 #endif
 785 }
 786
 787 /*
 788  * Get and process a message, returning FALSE if WM_QUIT
 789  * received (and also set the flag telling the app to exit the main loop)
 790  *
 791  */
 792 bool wxApp::DoMessage()
 793 {
 794     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 795     if ( rc == 0 )
 796     {
 797         // got WM_QUIT
 798         m_keepGoing = FALSE;
 799
 800         return FALSE;
 801     }
 802     else if ( rc == -1 )
 803     {
 804         // should never happen, but let's test for it nevertheless
 805         wxLogLastError("GetMessage");
 806     }
 807     else
 808     {
 809 #if wxUSE_THREADS
 810         wxASSERT_MSG( wxThread::IsMain(),
 811                       wxT("only the main thread can process Windows messages") );
 812
 813         static bool s_hadGuiLock = TRUE;
 814         static wxMsgArray s_aSavedMessages;
 815
 816         // if a secondary thread owns is doing GUI calls, save all messages for
 817         // later processing - we can't process them right now because it will
 818         // lead to recursive library calls (and we're not reentrant)
 819         if ( !wxGuiOwnedByMainThread() )
 820         {
 821             s_hadGuiLock = FALSE;
 822
 823             // leave out WM_COMMAND messages: too dangerous, sometimes
 824             // the message will be processed twice
 825             if ( !wxIsWaitingForThread() ||
 826                     s_currentMsg.message != WM_COMMAND )
 827             {
 828                 s_aSavedMessages.Add(s_currentMsg);
 829             }
 830
 831             return TRUE;
 832         }
 833         else
 834         {
 835             // have we just regained the GUI lock? if so, post all of the saved
 836             // messages
 837             //
 838             // FIXME of course, it's not _exactly_ the same as processing the
 839             //       messages normally - expect some things to break...
 840             if ( !s_hadGuiLock )
 841             {
 842                 s_hadGuiLock = TRUE;
 843
 844                 size_t count = s_aSavedMessages.Count();
 845                 for ( size_t n = 0; n < count; n++ )
 846                 {
 847                     MSG& msg = s_aSavedMessages[n];
 848
 849                     if ( !ProcessMessage((WXMSG *)&msg) )
 850                     {
 851                         ::TranslateMessage(&msg);
 852                         ::DispatchMessage(&msg);
 853                     }
 854                 }
 855
 856                 s_aSavedMessages.Empty();
 857             }
 858         }
 859 #endif // wxUSE_THREADS
 860
 861         // Process the message
 862         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 863         {
 864             ::TranslateMessage(&s_currentMsg);
 865             ::DispatchMessage(&s_currentMsg);
 866         }
 867     }
 868
 869     return TRUE;
 870 }
 871
 872 /*
 873  * Keep trying to process messages until WM_QUIT
 874  * received.
 875  *
 876  * If there are messages to be processed, they will all be
 877  * processed and OnIdle will not be called.
 878  * When there are no more messages, OnIdle is called.
 879  * If OnIdle requests more time,
 880  * it will be repeatedly called so long as there are no pending messages.
 881  * A 'feature' of this is that once OnIdle has decided that no more processing
 882  * is required, then it won't get processing time until further messages
 883  * are processed (it'll sit in DoMessage).
 884  */
 885
 886 int wxApp::MainLoop()
 887 {
 888     m_keepGoing = TRUE;
 889
 890     while ( m_keepGoing )
 891     {
 892 #if wxUSE_THREADS
 893         wxMutexGuiLeaveOrEnter();
 894 #endif // wxUSE_THREADS
 895
 896         while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 897                 ProcessIdle() )
 898         {
 899         }
 900
 901
 902         DoMessage();
 903     }
 904
 905     return s_currentMsg.wParam;
 906 }
 907
 908 // Returns TRUE if more time is needed.
 909 bool wxApp::ProcessIdle()
 910 {
 911     wxIdleEvent event;
 912     event.SetEventObject(this);
 913     ProcessEvent(event);
 914
 915     return event.MoreRequested();
 916 }
 917
 918 void wxApp::ExitMainLoop()
 919 {
 920     m_keepGoing = FALSE;
 921 }
 922
 923 bool wxApp::Pending()
 924 {
 925     return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0);
 926 }
 927
 928 void wxApp::Dispatch()
 929 {
 930     DoMessage();
 931 }
 932
 933 /*
 934  * Give all windows a chance to preprocess
 935  * the message. Some may have accelerator tables, or have
 936  * MDI complications.
 937  */
 938
 939 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 940 {
 941     MSG *msg = (MSG *)wxmsg;
 942     HWND hWnd = msg->hwnd;
 943     wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
 944
 945     // for some composite controls (like a combobox), wndThis might be NULL
 946     // because the subcontrol is not a wxWindow, but only the control itself
 947     // is - try to catch this case
 948     while ( hWnd && !wndThis )
 949     {
 950         hWnd = ::GetParent(hWnd);
 951         wndThis = wxFindWinFromHandle((WXHWND)hWnd);
 952     }
 953
 954     // Try translations first; find the youngest window with
 955     // a translation table.
 956     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 957     {
 958         if ( wnd->MSWTranslateMessage(wxmsg) )
 959             return TRUE;
 960     }
 961
 962     // Anyone for a non-translation message? Try youngest descendants first.
 963     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 964     {
 965         if ( wnd->MSWProcessMessage(wxmsg) )
 966             return TRUE;
 967     }
 968
 969     return FALSE;
 970 }
 971
 972 void wxApp::OnIdle(wxIdleEvent& event)
 973 {
 974     static bool s_inOnIdle = FALSE;
 975
 976     // Avoid recursion (via ProcessEvent default case)
 977     if ( s_inOnIdle )
 978         return;
 979
 980     s_inOnIdle = TRUE;
 981
 982     // 'Garbage' collection of windows deleted with Close().
 983     DeletePendingObjects();
 984
 985 #if wxUSE_LOG
 986     // flush the logged messages if any
 987     wxLog *pLog = wxLog::GetActiveTarget();
 988     if ( pLog != NULL && pLog->HasPendingMessages() )
 989         pLog->Flush();
 990 #endif // wxUSE_LOG
 991
 992     // Send OnIdle events to all windows
 993     if ( SendIdleEvents() )
 994     {
 995         // SendIdleEvents() returns TRUE if at least one window requested more
 996         // idle events
 997         event.RequestMore(TRUE);
 998     }
 999
1000     // If they are pending events, we must process them: pending events are
1001     // either events to the threads other than main or events posted with
1002     // wxPostEvent() functions
1003     ProcessPendingEvents();
1004
1005     s_inOnIdle = FALSE;
1006 }
1007
1008 // Send idle event to all top-level windows
1009 bool wxApp::SendIdleEvents()
1010 {
1011     bool needMore = FALSE;
1012
1013     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1014     while (node)
1015     {
1016         wxWindow* win = node->GetData();
1017         if (SendIdleEvents(win))
1018             needMore = TRUE;
1019         node = node->GetNext();
1020     }
1021
1022     return needMore;
1023 }
1024
1025 // Send idle event to window and all subwindows
1026 bool wxApp::SendIdleEvents(wxWindow* win)
1027 {
1028     bool needMore = FALSE;
1029
1030     wxIdleEvent event;
1031     event.SetEventObject(win);
1032     win->GetEventHandler()->ProcessEvent(event);
1033
1034     if (event.MoreRequested())
1035         needMore = TRUE;
1036
1037     wxNode* node = win->GetChildren().First();
1038     while (node)
1039     {
1040         wxWindow* win = (wxWindow*) node->Data();
1041         if (SendIdleEvents(win))
1042             needMore = TRUE;
1043
1044         node = node->Next();
1045     }
1046     return needMore;
1047 }
1048
1049 void wxApp::DeletePendingObjects()
1050 {
1051     wxNode *node = wxPendingDelete.First();
1052     while (node)
1053     {
1054         wxObject *obj = (wxObject *)node->Data();
1055
1056         delete obj;
1057
1058         if (wxPendingDelete.Member(obj))
1059             delete node;
1060
1061         // Deleting one object may have deleted other pending
1062         // objects, so start from beginning of list again.
1063         node = wxPendingDelete.First();
1064     }
1065 }
1066
1067 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1068 {
1069     if (GetTopWindow())
1070         GetTopWindow()->Close(TRUE);
1071 }
1072
1073 // Default behaviour: close the application with prompts. The
1074 // user can veto the close, and therefore the end session.
1075 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1076 {
1077     if (GetTopWindow())
1078     {
1079         if (!GetTopWindow()->Close(!event.CanVeto()))
1080             event.Veto(TRUE);
1081     }
1082 }
1083
1084 #if wxUSE_RICHEDIT
1085
1086 /* static */
1087 bool wxApp::InitRichEdit(int version)
1088 {
1089     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1090                  _T("incorrect richedit control version requested") );
1091
1092     if ( version <= gs_verRichEdit )
1093     {
1094         // we've already got this or better
1095         return TRUE;
1096     }
1097
1098     if ( gs_hRichEdit )
1099     {
1100         ::FreeLibrary(gs_hRichEdit);
1101     }
1102
1103     // always try load riched20.dll first - like this we won't have to reload
1104     // it later if we're first asked for RE 1 and then for RE 2 or 3
1105     wxString dllname = _T("riched20.dll");
1106     gs_hRichEdit = ::LoadLibrary(dllname);
1107     if ( !gs_hRichEdit && (version == 1) )
1108     {
1109         // fall back to RE 1
1110         dllname = _T("riched32.dll");
1111         gs_hRichEdit = ::LoadLibrary(dllname);
1112     }
1113
1114     if ( !gs_hRichEdit )
1115     {
1116         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1117
1118         gs_verRichEdit = -1;
1119
1120         return FALSE;
1121     }
1122
1123     gs_verRichEdit = version;
1124
1125     return TRUE;
1126 }
1127
1128 #endif // wxUSE_RICHEDIT
1129
1130 /* static */
1131 int wxApp::GetComCtl32Version()
1132 {
1133     // TODO should use DllGetVersion() instead of this hack
1134
1135     // cache the result
1136     static int s_verComCtl32 = -1;      // MT-FIXME
1137
1138     if ( s_verComCtl32 == -1 )
1139     {
1140         s_verComCtl32 = 0;
1141
1142         // have we loaded COMCTL32 yet?
1143         HMODULE theModule = ::GetModuleHandle(wxT("COMCTL32"));
1144
1145         // if so, then we can check for the version
1146         if (theModule)
1147         {
1148             // InitCommonControlsEx is unique to 4.7 and later
1149             FARPROC theProc = ::GetProcAddress(theModule,
1150                                                _T("InitCommonControlsEx"));
1151
1152             if ( !theProc )
1153             {                    // not found, must be 4.00
1154                 s_verComCtl32 = 400;
1155             }
1156             else
1157             {
1158                 // The following symbol are unique to 4.71
1159                 //   DllInstall
1160                 //   FlatSB_EnableScrollBar FlatSB_GetScrollInfo FlatSB_GetScrollPos
1161                 //   FlatSB_GetScrollProp FlatSB_GetScrollRange FlatSB_SetScrollInfo
1162                 //   FlatSB_SetScrollPos FlatSB_SetScrollProp FlatSB_SetScrollRange
1163                 //   FlatSB_ShowScrollBar
1164                 //   _DrawIndirectImageList _DuplicateImageList
1165                 //   InitializeFlatSB
1166                 //   UninitializeFlatSB
1167                 // we could check for any of these - I chose DllInstall
1168                 FARPROC theProc = ::GetProcAddress(theModule, _T("DllInstall"));
1169                 if ( !theProc )
1170                 {
1171                     // not found, must be 4.70
1172                     s_verComCtl32 = 470;
1173                 }
1174                 else
1175                 {                         // found, must be 4.71
1176                     s_verComCtl32 = 471;
1177                 }
1178             }
1179         }
1180     }
1181
1182     return s_verComCtl32;
1183 }
1184
1185 void wxExit()
1186 {
1187     wxLogError(_("Fatal error: exiting"));
1188
1189     wxApp::CleanUp();
1190 }
1191
1192 // Yield to incoming messages
1193 bool wxYield()
1194 {
1195     // we don't want to process WM_QUIT from here - it should be processed in
1196     // the main event loop in order to stop it
1197
1198     MSG msg;
1199     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
1200             msg.message != WM_QUIT )
1201     {
1202         if ( !wxTheApp->DoMessage() )
1203             break;
1204     }
1205
1206     // If they are pending events, we must process them.
1207     wxTheApp->ProcessPendingEvents();
1208
1209     return TRUE;
1210 }
1211
1212 //-----------------------------------------------------------------------------
1213 // wxWakeUpIdle
1214 //-----------------------------------------------------------------------------
1215
1216 void wxWakeUpIdle()
1217 {
1218     // Send the top window a dummy message so idle handler processing will
1219     // start up again.  Doing it this way ensures that the idle handler
1220     // wakes up in the right thread.
1221     wxWindow *topWindow = wxTheApp->GetTopWindow();
1222     if ( topWindow ) {
1223         HWND hWnd = (HWND)topWindow->GetHWND();
1224         ::PostMessage(hWnd, WM_NULL, 0, 0);
1225     }
1226 }
1227
1228 //-----------------------------------------------------------------------------
1229
1230 wxIcon
1231 wxApp::GetStdIcon(int which) const
1232 {
1233     switch(which)
1234     {
1235         case wxICON_INFORMATION:
1236             return wxIcon("wxICON_INFO");
1237
1238         case wxICON_QUESTION:
1239             return wxIcon("wxICON_QUESTION");
1240
1241         case wxICON_EXCLAMATION:
1242             return wxIcon("wxICON_WARNING");
1243
1244         default:
1245             wxFAIL_MSG(wxT("requested non existent standard icon"));
1246             // still fall through
1247
1248         case wxICON_HAND:
1249             return wxIcon("wxICON_ERROR");
1250     }
1251 }
1252
1253
1254 HINSTANCE wxGetInstance()
1255 {
1256     return wxhInstance;
1257 }
1258
1259 void wxSetInstance(HINSTANCE hInst)
1260 {
1261     wxhInstance = hInst;
1262 }
1263
1264 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1265 // if in a separate file. So include it here to ensure it's linked.
1266 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
1267 #include "main.cpp"
1268 #endif