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 defined(__WIN95__) && !defined(__TWIN32__)
 133     #define wxUSE_RICHEDIT 1
 134 #else
 135     #define wxUSE_RICHEDIT 0
 136 #endif
 137
 138 #if wxUSE_RICHEDIT
 139     static HINSTANCE gs_hRichEdit = (HINSTANCE) NULL;
 140 #endif
 141
 142 // ===========================================================================
 143 // implementation
 144 // ===========================================================================
 145
 146 // ---------------------------------------------------------------------------
 147 // wxApp
 148 // ---------------------------------------------------------------------------
 149
 150 #if !USE_SHARED_LIBRARY
 151     IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 152
 153     BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 154         EVT_IDLE(wxApp::OnIdle)
 155         EVT_END_SESSION(wxApp::OnEndSession)
 156         EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 157     END_EVENT_TABLE()
 158 #endif
 159
 160 //// Initialize
 161 bool wxApp::Initialize()
 162 {
 163     // Some people may wish to use this, but
 164     // probably it shouldn't be here by default.
 165 #ifdef __WXDEBUG__
 166     //    wxRedirectIOToConsole();
 167 #endif
 168
 169     wxBuffer = new wxChar[1500]; // FIXME
 170
 171     wxClassInfo::InitializeClasses();
 172
 173 #if wxUSE_RESOURCES
 174     wxGetResource(wxT("wxWindows"), wxT("OsVersion"), &wxOsVersion);
 175 #endif
 176
 177 #if wxUSE_THREADS
 178     wxPendingEventsLocker = new wxCriticalSection;
 179 #endif
 180
 181     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 182     wxTheColourDatabase->Initialize();
 183
 184     wxInitializeStockLists();
 185     wxInitializeStockObjects();
 186
 187 #if wxUSE_WX_RESOURCES
 188     wxInitializeResourceSystem();
 189 #endif
 190
 191     wxBitmap::InitStandardHandlers();
 192
 193 #if defined(__WIN95__)
 194     InitCommonControls();
 195
 196 #if wxUSE_RICHEDIT
 197     gs_hRichEdit = LoadLibrary(wxT("RICHED32.DLL"));
 198
 199     if (gs_hRichEdit == (HINSTANCE) NULL)
 200     {
 201         wxLogError(_("Could not initialise Rich Edit DLL"));
 202     }
 203 #endif // wxUSE_RICHEDIT
 204
 205 #endif // __WIN95__
 206
 207 #if wxUSE_OLE
 208
 209 #ifdef __WIN16__
 210     // for OLE, enlarge message queue to be as large as possible
 211     int iMsg = 96;
 212     while (!SetMessageQueue(iMsg) && (iMsg -= 8))
 213         ;
 214 #endif // Win16
 215     // we need to initialize OLE library
 216     if ( FAILED(::OleInitialize(NULL)) )
 217         wxLogError(_("Cannot initialize OLE"));
 218 #endif // wxUSE_OLE
 219
 220 #if wxUSE_CTL3D
 221     if (!Ctl3dRegister(wxhInstance))
 222         wxLogError(wxT("Cannot register CTL3D"));
 223
 224     Ctl3dAutoSubclass(wxhInstance);
 225 #endif
 226
 227     g_globalCursor = new wxCursor;
 228
 229     // VZ: these icons are not in wx.rc anyhow (but should they?)!
 230 #if 0
 231     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
 232     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
 233     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
 234
 235     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
 236     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
 237     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDICHILDFRAME"));
 238 #endif // 0
 239
 240     RegisterWindowClasses();
 241
 242     // Create the brush for disabling bitmap buttons
 243
 244     LOGBRUSH lb;
 245     lb.lbStyle = BS_PATTERN;
 246     lb.lbHatch = (int)LoadBitmap( wxhInstance, wxT("wxDISABLE_BUTTON_BITMAP") );
 247     if ( lb.lbHatch )
 248     {
 249         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 250         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 251     }
 252     //else: wxWindows resources are probably not linked in
 253
 254 #if wxUSE_PENWINDOWS
 255     wxRegisterPenWin();
 256 #endif
 257
 258     wxWinHandleList = new wxList(wxKEY_INTEGER);
 259
 260     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 261     // PLEASE DO NOT ALTER THIS.
 262 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 263     extern char wxDummyChar;
 264     if (wxDummyChar) wxDummyChar++;
 265 #endif
 266
 267     wxSetKeyboardHook(TRUE);
 268
 269     wxModule::RegisterModules();
 270     if (!wxModule::InitializeModules())
 271         return FALSE;
 272     return TRUE;
 273 }
 274
 275 // ---------------------------------------------------------------------------
 276 // RegisterWindowClasses
 277 // ---------------------------------------------------------------------------
 278
 279 // TODO we should only register classes really used by the app. For this it
 280 //      would be enough to just delay the class registration until an attempt
 281 //      to create a window of this class is made.
 282 bool wxApp::RegisterWindowClasses()
 283 {
 284     WNDCLASS wndclass;
 285
 286     // for each class we register one with CS_(V|H)REDRAW style and one
 287     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 288     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 289     static const long styleNoRedraw = CS_DBLCLKS;
 290
 291     // the fields which are common to all classes
 292     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 293     wndclass.cbClsExtra    = 0;
 294     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 295     wndclass.hInstance     = wxhInstance;
 296     wndclass.hIcon         = (HICON) NULL;
 297     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 298     wndclass.lpszMenuName  = NULL;
 299
 300     // Register the frame window class.
 301     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 302     wndclass.lpszClassName = wxFrameClassName;
 303     wndclass.style         = styleNormal;
 304
 305     if ( !RegisterClass(&wndclass) )
 306     {
 307         wxLogLastError("RegisterClass(frame)");
 308
 309         return FALSE;
 310     }
 311
 312     // "no redraw" frame
 313     wndclass.lpszClassName = wxFrameClassNameNoRedraw;
 314     wndclass.style         = styleNoRedraw;
 315
 316     if ( !RegisterClass(&wndclass) )
 317     {
 318         wxLogLastError("RegisterClass(no redraw frame)");
 319
 320         return FALSE;
 321     }
 322
 323     // Register the MDI frame window class.
 324     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 325     wndclass.lpszClassName = wxMDIFrameClassName;
 326     wndclass.style         = styleNormal;
 327
 328     if ( !RegisterClass(&wndclass) )
 329     {
 330         wxLogLastError("RegisterClass(MDI parent)");
 331
 332         return FALSE;
 333     }
 334
 335     // "no redraw" MDI frame
 336     wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
 337     wndclass.style         = styleNoRedraw;
 338
 339     if ( !RegisterClass(&wndclass) )
 340     {
 341         wxLogLastError("RegisterClass(no redraw MDI parent frame)");
 342
 343         return FALSE;
 344     }
 345
 346     // Register the MDI child frame window class.
 347     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 348     wndclass.lpszClassName = wxMDIChildFrameClassName;
 349     wndclass.style         = styleNormal;
 350
 351     if ( !RegisterClass(&wndclass) )
 352     {
 353         wxLogLastError("RegisterClass(MDI child)");
 354
 355         return FALSE;
 356     }
 357
 358     // "no redraw" MDI child frame
 359     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 360     wndclass.style         = styleNoRedraw;
 361
 362     if ( !RegisterClass(&wndclass) )
 363     {
 364         wxLogLastError("RegisterClass(no redraw MDI child)");
 365
 366         return FALSE;
 367     }
 368
 369     // Register the panel window class.
 370     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 371     wndclass.lpszClassName = wxPanelClassName;
 372     wndclass.style         = styleNormal;
 373
 374     if ( !RegisterClass(&wndclass) )
 375     {
 376         wxLogLastError("RegisterClass(panel)");
 377
 378         return FALSE;
 379     }
 380
 381     // Register the canvas and textsubwindow class name
 382     wndclass.hbrBackground = (HBRUSH)NULL;
 383     wndclass.lpszClassName = wxCanvasClassName;
 384
 385     if ( !RegisterClass(&wndclass) )
 386     {
 387         wxLogLastError("RegisterClass(canvas)");
 388
 389         return FALSE;
 390     }
 391
 392     return TRUE;
 393 }
 394
 395 // ---------------------------------------------------------------------------
 396 // Convert Windows to argc, argv style
 397 // ---------------------------------------------------------------------------
 398
 399 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 400 {
 401     wxStringList args;
 402
 403     wxString cmdLine(lpCmdLine);
 404     int count = 0;
 405
 406     // Get application name
 407     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 408     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 409
 410     args.Add(name);
 411     count++;
 412
 413     wxStrcpy(name, wxFileNameFromPath(name));
 414     wxStripExtension(name);
 415     wxTheApp->SetAppName(name);
 416
 417     // Break up string
 418     // Treat strings enclosed in double-quotes as single arguments
 419     int i = 0;
 420     int len = cmdLine.Length();
 421     while (i < len)
 422     {
 423         // Skip whitespace
 424         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 425             i ++;
 426
 427         if (i < len)
 428         {
 429             if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
 430             {
 431                 i ++;
 432                 int first = i;
 433                 while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
 434                     i ++;
 435
 436                 wxString arg(cmdLine.Mid(first, (i - first)));
 437
 438                 args.Add(arg);
 439                 count ++;
 440
 441                 if (i < len)
 442                     i ++; // Skip past 2nd quote
 443             }
 444             else // Unquoted argument
 445             {
 446                 int first = i;
 447                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 448                     i ++;
 449
 450                 wxString arg(cmdLine.Mid(first, (i - first)));
 451
 452                 args.Add(arg);
 453                 count ++;
 454             }
 455         }
 456     }
 457
 458     wxTheApp->argv = new wxChar*[count + 1];
 459     for (i = 0; i < count; i++)
 460     {
 461         wxString arg(args[i]);
 462         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 463     }
 464     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 465     wxTheApp->argc = count;
 466 }
 467
 468 //// Cleans up any wxWindows internal structures left lying around
 469
 470 void wxApp::CleanUp()
 471 {
 472     //// COMMON CLEANUP
 473
 474 #if wxUSE_LOG
 475     // flush the logged messages if any and install a 'safer' log target: the
 476     // default one (wxLogGui) can't be used after the resources are freed just
 477     // below and the user suppliedo ne might be even more unsafe (using any
 478     // wxWindows GUI function is unsafe starting from now)
 479     wxLog::DontCreateOnDemand();
 480
 481     // this will flush the old messages if any
 482     delete wxLog::SetActiveTarget(new wxLogStderr);
 483 #endif // wxUSE_LOG
 484
 485     // One last chance for pending objects to be cleaned up
 486     wxTheApp->DeletePendingObjects();
 487
 488     wxModule::CleanUpModules();
 489
 490 #if wxUSE_WX_RESOURCES
 491     wxCleanUpResourceSystem();
 492
 493     //  wxDefaultResourceTable->ClearTable();
 494 #endif
 495
 496     // Indicate that the cursor can be freed, so that cursor won't be deleted
 497     // by deleting the bitmap list before g_globalCursor goes out of scope
 498     // (double deletion of the cursor).
 499     wxSetCursor(wxNullCursor);
 500     delete g_globalCursor;
 501     g_globalCursor = NULL;
 502
 503     wxDeleteStockObjects();
 504
 505     // Destroy all GDI lists, etc.
 506     wxDeleteStockLists();
 507
 508     delete wxTheColourDatabase;
 509     wxTheColourDatabase = NULL;
 510
 511     wxBitmap::CleanUpHandlers();
 512
 513     delete[] wxBuffer;
 514     wxBuffer = NULL;
 515
 516     //// WINDOWS-SPECIFIC CLEANUP
 517
 518     wxSetKeyboardHook(FALSE);
 519
 520 #ifdef __WIN95__
 521
 522 #if wxUSE_RICHEDIT
 523     if (gs_hRichEdit != (HINSTANCE) NULL)
 524         FreeLibrary(gs_hRichEdit);
 525 #endif
 526
 527 #endif
 528
 529 #if wxUSE_PENWINDOWS
 530     wxCleanUpPenWin();
 531 #endif
 532
 533     if (wxSTD_FRAME_ICON)
 534         DestroyIcon(wxSTD_FRAME_ICON);
 535     if (wxSTD_MDICHILDFRAME_ICON)
 536         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 537     if (wxSTD_MDIPARENTFRAME_ICON)
 538         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 539
 540     if (wxDEFAULT_FRAME_ICON)
 541         DestroyIcon(wxDEFAULT_FRAME_ICON);
 542     if (wxDEFAULT_MDICHILDFRAME_ICON)
 543         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 544     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 545         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 546
 547     if ( wxDisableButtonBrush )
 548         ::DeleteObject( wxDisableButtonBrush );
 549
 550 #if wxUSE_OLE
 551     ::OleUninitialize();
 552 #endif
 553
 554 #if wxUSE_CTL3D
 555     Ctl3dUnregister(wxhInstance);
 556 #endif
 557
 558     if (wxWinHandleList)
 559         delete wxWinHandleList;
 560
 561     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 562     // create a module for that as it's part of the core.
 563     delete wxPendingEvents;
 564 #if wxUSE_THREADS
 565     delete wxPendingEventsLocker;
 566     // If we don't do the following, we get an apparent memory leak.
 567     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 568 #endif
 569
 570     wxClassInfo::CleanUpClasses();
 571
 572     delete wxTheApp;
 573     wxTheApp = NULL;
 574
 575 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 576     // At this point we want to check if there are any memory
 577     // blocks that aren't part of the wxDebugContext itself,
 578     // as a special case. Then when dumping we need to ignore
 579     // wxDebugContext, too.
 580     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 581     {
 582         wxLogDebug(wxT("There were memory leaks."));
 583         wxDebugContext::Dump();
 584         wxDebugContext::PrintStatistics();
 585     }
 586     //  wxDebugContext::SetStream(NULL, NULL);
 587 #endif
 588
 589 #if wxUSE_LOG
 590     // do it as the very last thing because everything else can log messages
 591     delete wxLog::SetActiveTarget(NULL);
 592 #endif // wxUSE_LOG
 593 }
 594
 595 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 596
 597 // temporarily disable this warning which would be generated in release builds
 598 // because of __try
 599 #ifdef __VISUALC__
 600     #pragma warning(disable: 4715) // not all control paths return a value
 601 #endif // Visual C++
 602
 603 //// Main wxWindows entry point
 604 int wxEntry(WXHINSTANCE hInstance,
 605             WXHINSTANCE WXUNUSED(hPrevInstance),
 606             char *lpCmdLine,
 607             int nCmdShow,
 608             bool enterLoop)
 609 {
 610     // do check for memory leaks on program exit
 611     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 612     //  deallocated memory which may be used to simulate low-memory condition)
 613     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 614
 615     // take everything into a try-except block in release build
 616     // FIXME other compilers must support Win32 SEH (structured exception
 617     //       handling) too, just find the appropriate keyword in their docs!
 618     //       Please note that it's _not_ the same as C++ exceptions!
 619 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 620     #define CATCH_PROGRAM_EXCEPTIONS
 621
 622     __try {
 623 #else
 624     #undef  CATCH_PROGRAM_EXCEPTIONS
 625 #endif
 626         wxhInstance = (HINSTANCE) hInstance;
 627
 628         if (!wxApp::Initialize())
 629             return 0;
 630
 631         // create the application object or ensure that one already exists
 632         if (!wxTheApp)
 633         {
 634             // The app may have declared a global application object, but we recommend
 635             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 636             // function for delayed, dynamic app object construction.
 637             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 638                          wxT("No initializer - use IMPLEMENT_APP macro.") );
 639
 640             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 641         }
 642
 643         wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
 644
 645         // save the WinMain() parameters
 646         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 647         wxTheApp->m_nCmdShow = nCmdShow;
 648
 649         // GUI-specific initialisation. In fact on Windows we don't have any,
 650         // but this call is provided for compatibility across platforms.
 651         wxTheApp->OnInitGui();
 652
 653         // We really don't want timestamps by default, because it means
 654         // we can't simply double-click on the error message and get to that
 655         // line in the source. So VC++ at least, let's have a sensible default.
 656 #ifdef __VISUALC__
 657         wxLog::SetTimestamp(NULL);
 658 #endif
 659
 660         int retValue = 0;
 661
 662         if ( wxTheApp->OnInit() )
 663         {
 664             if ( enterLoop )
 665             {
 666                 retValue = wxTheApp->OnRun();
 667             }
 668             else
 669                 // We want to initialize, but not run or exit immediately.
 670                 return 1;
 671         }
 672         //else: app initialization failed, so we skipped OnRun()
 673
 674         wxWindow *topWindow = wxTheApp->GetTopWindow();
 675         if ( topWindow )
 676         {
 677             // Forcibly delete the window.
 678             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 679                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 680             {
 681                 topWindow->Close(TRUE);
 682                 wxTheApp->DeletePendingObjects();
 683             }
 684             else
 685             {
 686                 delete topWindow;
 687                 wxTheApp->SetTopWindow(NULL);
 688             }
 689         }
 690
 691         wxTheApp->OnExit();
 692
 693         wxApp::CleanUp();
 694
 695         return retValue;
 696
 697 #ifdef CATCH_PROGRAM_EXCEPTIONS
 698     }
 699     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 700         /*
 701            if ( wxTheApp )
 702            wxTheApp->OnFatalException();
 703          */
 704
 705         // using wxLog would be unsafe here
 706         ::MessageBox(NULL,
 707                      _("Unrecoverable program error detected: "
 708                      " the application will terminate."),
 709                      _("Fatal Error"),
 710                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 711
 712         ::ExitProcess(3); // the same exit code as abort()
 713
 714         // NOTREACHED
 715     }
 716 #endif // CATCH_PROGRAM_EXCEPTIONS
 717 }
 718
 719 // restore warning state
 720 #ifdef __VISUALC__
 721     #pragma warning(default: 4715) // not all control paths return a value
 722 #endif // Visual C++
 723
 724 #else /*  _WINDLL  */
 725
 726 //// Entry point for DLLs
 727
 728 int wxEntry(WXHINSTANCE hInstance)
 729 {
 730     wxhInstance = (HINSTANCE) hInstance;
 731     wxApp::Initialize();
 732
 733     // The app may have declared a global application object, but we recommend
 734     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 735     // for delayed, dynamic app object construction.
 736     if (!wxTheApp)
 737     {
 738         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 739                      "No initializer - use IMPLEMENT_APP macro." );
 740
 741         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 742     }
 743
 744     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 745
 746     wxTheApp->argc = 0;
 747     wxTheApp->argv = NULL;
 748
 749     wxTheApp->OnInitGui();
 750
 751     wxTheApp->OnInit();
 752
 753     wxWindow *topWindow = wxTheApp->GetTopWindow();
 754     if ( topWindow && topWindow->GetHWND())
 755     {
 756         topWindow->Show(TRUE);
 757     }
 758
 759     return 1;
 760 }
 761 #endif // _WINDLL
 762
 763 //// Static member initialization
 764
 765 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 766
 767 wxApp::wxApp()
 768 {
 769     m_topWindow = NULL;
 770     wxTheApp = this;
 771     m_wantDebugOutput = TRUE;
 772
 773     argc = 0;
 774     argv = NULL;
 775     m_printMode = wxPRINT_WINDOWS;
 776     m_exitOnFrameDelete = TRUE;
 777     m_auto3D = TRUE;
 778 }
 779
 780 wxApp::~wxApp()
 781 {
 782     // Delete command-line args
 783     int i;
 784     for (i = 0; i < argc; i++)
 785     {
 786         delete[] argv[i];
 787     }
 788     delete[] argv;
 789 }
 790
 791 bool wxApp::Initialized()
 792 {
 793 #ifndef _WINDLL
 794     if (GetTopWindow())
 795         return TRUE;
 796     else
 797         return FALSE;
 798 #endif
 799 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 800     return TRUE;
 801 #endif
 802 }
 803
 804 /*
 805  * Get and process a message, returning FALSE if WM_QUIT
 806  * received (and also set the flag telling the app to exit the main loop)
 807  *
 808  */
 809 bool wxApp::DoMessage()
 810 {
 811     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 812     if ( rc == 0 )
 813     {
 814         // got WM_QUIT
 815         m_keepGoing = FALSE;
 816
 817         return FALSE;
 818     }
 819     else if ( rc == -1 )
 820     {
 821         // should never happen, but let's test for it nevertheless
 822         wxLogLastError("GetMessage");
 823     }
 824     else
 825     {
 826 #if wxUSE_THREADS
 827         wxASSERT_MSG( wxThread::IsMain(),
 828                       wxT("only the main thread can process Windows messages") );
 829
 830         static bool s_hadGuiLock = TRUE;
 831         static wxMsgArray s_aSavedMessages;
 832
 833         // if a secondary thread owns is doing GUI calls, save all messages for
 834         // later processing - we can't process them right now because it will
 835         // lead to recursive library calls (and we're not reentrant)
 836         if ( !wxGuiOwnedByMainThread() )
 837         {
 838             s_hadGuiLock = FALSE;
 839
 840             // leave out WM_COMMAND messages: too dangerous, sometimes
 841             // the message will be processed twice
 842             if ( !wxIsWaitingForThread() ||
 843                     s_currentMsg.message != WM_COMMAND )
 844             {
 845                 s_aSavedMessages.Add(s_currentMsg);
 846             }
 847
 848             return TRUE;
 849         }
 850         else
 851         {
 852             // have we just regained the GUI lock? if so, post all of the saved
 853             // messages
 854             //
 855             // FIXME of course, it's not _exactly_ the same as processing the
 856             //       messages normally - expect some things to break...
 857             if ( !s_hadGuiLock )
 858             {
 859                 s_hadGuiLock = TRUE;
 860
 861                 size_t count = s_aSavedMessages.Count();
 862                 for ( size_t n = 0; n < count; n++ )
 863                 {
 864                     MSG& msg = s_aSavedMessages[n];
 865
 866                     if ( !ProcessMessage((WXMSG *)&msg) )
 867                     {
 868                         ::TranslateMessage(&msg);
 869                         ::DispatchMessage(&msg);
 870                     }
 871                 }
 872
 873                 s_aSavedMessages.Empty();
 874             }
 875         }
 876 #endif // wxUSE_THREADS
 877
 878         // Process the message
 879         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 880         {
 881             ::TranslateMessage(&s_currentMsg);
 882             ::DispatchMessage(&s_currentMsg);
 883         }
 884     }
 885
 886     return TRUE;
 887 }
 888
 889 /*
 890  * Keep trying to process messages until WM_QUIT
 891  * received.
 892  *
 893  * If there are messages to be processed, they will all be
 894  * processed and OnIdle will not be called.
 895  * When there are no more messages, OnIdle is called.
 896  * If OnIdle requests more time,
 897  * it will be repeatedly called so long as there are no pending messages.
 898  * A 'feature' of this is that once OnIdle has decided that no more processing
 899  * is required, then it won't get processing time until further messages
 900  * are processed (it'll sit in DoMessage).
 901  */
 902
 903 int wxApp::MainLoop()
 904 {
 905     m_keepGoing = TRUE;
 906
 907     while ( m_keepGoing )
 908     {
 909 #if wxUSE_THREADS
 910         wxMutexGuiLeaveOrEnter();
 911 #endif // wxUSE_THREADS
 912
 913         while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 914                 ProcessIdle() )
 915         {
 916         }
 917
 918
 919         DoMessage();
 920     }
 921
 922     return s_currentMsg.wParam;
 923 }
 924
 925 // Returns TRUE if more time is needed.
 926 bool wxApp::ProcessIdle()
 927 {
 928     wxIdleEvent event;
 929     event.SetEventObject(this);
 930     ProcessEvent(event);
 931
 932     return event.MoreRequested();
 933 }
 934
 935 void wxApp::ExitMainLoop()
 936 {
 937     m_keepGoing = FALSE;
 938 }
 939
 940 bool wxApp::Pending()
 941 {
 942     return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0);
 943 }
 944
 945 void wxApp::Dispatch()
 946 {
 947     DoMessage();
 948 }
 949
 950 /*
 951  * Give all windows a chance to preprocess
 952  * the message. Some may have accelerator tables, or have
 953  * MDI complications.
 954  */
 955
 956 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 957 {
 958     MSG *msg = (MSG *)wxmsg;
 959     HWND hWnd = msg->hwnd;
 960     wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
 961
 962     // for some composite controls (like a combobox), wndThis might be NULL
 963     // because the subcontrol is not a wxWindow, but only the control itself
 964     // is - try to catch this case
 965     while ( hWnd && !wndThis )
 966     {
 967         hWnd = ::GetParent(hWnd);
 968         wndThis = wxFindWinFromHandle((WXHWND)hWnd);
 969     }
 970
 971     // Try translations first; find the youngest window with
 972     // a translation table.
 973     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 974     {
 975         if ( wnd->MSWTranslateMessage(wxmsg) )
 976             return TRUE;
 977     }
 978
 979     // Anyone for a non-translation message? Try youngest descendants first.
 980     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 981     {
 982         if ( wnd->MSWProcessMessage(wxmsg) )
 983             return TRUE;
 984     }
 985
 986     return FALSE;
 987 }
 988
 989 void wxApp::OnIdle(wxIdleEvent& event)
 990 {
 991     static bool s_inOnIdle = FALSE;
 992
 993     // Avoid recursion (via ProcessEvent default case)
 994     if ( s_inOnIdle )
 995         return;
 996
 997     s_inOnIdle = TRUE;
 998
 999     // 'Garbage' collection of windows deleted with Close().
1000     DeletePendingObjects();
1001
1002 #if wxUSE_LOG
1003     // flush the logged messages if any
1004     wxLog *pLog = wxLog::GetActiveTarget();
1005     if ( pLog != NULL && pLog->HasPendingMessages() )
1006         pLog->Flush();
1007 #endif // wxUSE_LOG
1008
1009     // Send OnIdle events to all windows
1010     if ( SendIdleEvents() )
1011     {
1012         // SendIdleEvents() returns TRUE if at least one window requested more
1013         // idle events
1014         event.RequestMore(TRUE);
1015     }
1016
1017     // If they are pending events, we must process them: pending events are
1018     // either events to the threads other than main or events posted with
1019     // wxPostEvent() functions
1020     ProcessPendingEvents();
1021
1022     s_inOnIdle = FALSE;
1023 }
1024
1025 // Send idle event to all top-level windows
1026 bool wxApp::SendIdleEvents()
1027 {
1028     bool needMore = FALSE;
1029
1030     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1031     while (node)
1032     {
1033         wxWindow* win = node->GetData();
1034         if (SendIdleEvents(win))
1035             needMore = TRUE;
1036         node = node->GetNext();
1037     }
1038
1039     return needMore;
1040 }
1041
1042 // Send idle event to window and all subwindows
1043 bool wxApp::SendIdleEvents(wxWindow* win)
1044 {
1045     bool needMore = FALSE;
1046
1047     wxIdleEvent event;
1048     event.SetEventObject(win);
1049     win->GetEventHandler()->ProcessEvent(event);
1050
1051     if (event.MoreRequested())
1052         needMore = TRUE;
1053
1054     wxNode* node = win->GetChildren().First();
1055     while (node)
1056     {
1057         wxWindow* win = (wxWindow*) node->Data();
1058         if (SendIdleEvents(win))
1059             needMore = TRUE;
1060
1061         node = node->Next();
1062     }
1063     return needMore;
1064 }
1065
1066 void wxApp::DeletePendingObjects()
1067 {
1068     wxNode *node = wxPendingDelete.First();
1069     while (node)
1070     {
1071         wxObject *obj = (wxObject *)node->Data();
1072
1073         delete obj;
1074
1075         if (wxPendingDelete.Member(obj))
1076             delete node;
1077
1078         // Deleting one object may have deleted other pending
1079         // objects, so start from beginning of list again.
1080         node = wxPendingDelete.First();
1081     }
1082 }
1083
1084 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1085 {
1086     if (GetTopWindow())
1087         GetTopWindow()->Close(TRUE);
1088 }
1089
1090 // Default behaviour: close the application with prompts. The
1091 // user can veto the close, and therefore the end session.
1092 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1093 {
1094     if (GetTopWindow())
1095     {
1096         if (!GetTopWindow()->Close(!event.CanVeto()))
1097             event.Veto(TRUE);
1098     }
1099 }
1100
1101 int wxApp::GetComCtl32Version() const
1102 {
1103     // have we loaded COMCTL32 yet?
1104     HMODULE theModule = ::GetModuleHandle(wxT("COMCTL32"));
1105     int version = 0;
1106
1107     // if so, then we can check for the version
1108     if (theModule)
1109     {
1110         // InitCommonControlsEx is unique to 4.7 and later
1111         FARPROC theProc = ::GetProcAddress(theModule, "InitCommonControlsEx");
1112
1113         if (! theProc)
1114         {                    // not found, must be 4.00
1115             version = 400;
1116         }
1117         else
1118         {
1119             // The following symbol are unique to 4.71
1120             //   DllInstall
1121             //   FlatSB_EnableScrollBar FlatSB_GetScrollInfo FlatSB_GetScrollPos
1122             //   FlatSB_GetScrollProp FlatSB_GetScrollRange FlatSB_SetScrollInfo
1123             //   FlatSB_SetScrollPos FlatSB_SetScrollProp FlatSB_SetScrollRange
1124             //   FlatSB_ShowScrollBar
1125             //   _DrawIndirectImageList _DuplicateImageList
1126             //   InitializeFlatSB
1127             //   UninitializeFlatSB
1128             // we could check for any of these - I chose DllInstall
1129             FARPROC theProc = ::GetProcAddress(theModule, "DllInstall");
1130             if (! theProc)
1131             {
1132                 // not found, must be 4.70
1133                 version = 470;
1134             }
1135             else
1136             {                         // found, must be 4.71
1137                 version = 471;
1138             }
1139         }
1140     }
1141     return version;
1142 }
1143
1144 void wxExit()
1145 {
1146     wxLogError(_("Fatal error: exiting"));
1147
1148     wxApp::CleanUp();
1149 }
1150
1151 // Yield to incoming messages
1152 bool wxYield()
1153 {
1154     // we don't want to process WM_QUIT from here - it should be processed in
1155     // the main event loop in order to stop it
1156
1157     MSG msg;
1158     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
1159             msg.message != WM_QUIT )
1160     {
1161         if ( !wxTheApp->DoMessage() )
1162             break;
1163     }
1164
1165     // If they are pending events, we must process them.
1166     wxTheApp->ProcessPendingEvents();
1167
1168     return TRUE;
1169 }
1170
1171 wxIcon
1172 wxApp::GetStdIcon(int which) const
1173 {
1174     switch(which)
1175     {
1176         case wxICON_INFORMATION:
1177             return wxIcon("wxICON_INFO");
1178
1179         case wxICON_QUESTION:
1180             return wxIcon("wxICON_QUESTION");
1181
1182         case wxICON_EXCLAMATION:
1183             return wxIcon("wxICON_WARNING");
1184
1185         default:
1186             wxFAIL_MSG(wxT("requested non existent standard icon"));
1187             // still fall through
1188
1189         case wxICON_HAND:
1190             return wxIcon("wxICON_ERROR");
1191     }
1192 }
1193
1194
1195 HINSTANCE wxGetInstance()
1196 {
1197     return wxhInstance;
1198 }
1199
1200 void wxSetInstance(HINSTANCE hInst)
1201 {
1202     wxhInstance = hInst;
1203 }
1204
1205 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1206 // if in a separate file. So include it here to ensure it's linked.
1207 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
1208 #include "main.cpp"
1209 #endif