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