src/msw/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.cpp
   3 // Purpose:     wxApp
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "app.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #if defined(__BORLANDC__)
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/frame.h"
  33     #include "wx/app.h"
  34     #include "wx/utils.h"
  35     #include "wx/gdicmn.h"
  36     #include "wx/pen.h"
  37     #include "wx/brush.h"
  38     #include "wx/cursor.h"
  39     #include "wx/icon.h"
  40     #include "wx/palette.h"
  41     #include "wx/dc.h"
  42     #include "wx/dialog.h"
  43     #include "wx/msgdlg.h"
  44     #include "wx/intl.h"
  45     #include "wx/dynarray.h"
  46     #include "wx/wxchar.h"
  47     #include "wx/icon.h"
  48 #endif
  49
  50 #include "wx/log.h"
  51 #include "wx/module.h"
  52
  53 #include "wx/msw/private.h"
  54
  55 #if wxUSE_THREADS
  56     #include "wx/thread.h"
  57
  58     // define the array of MSG strutures
  59     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
  60
  61     #include "wx/arrimpl.cpp"
  62
  63     WX_DEFINE_OBJARRAY(wxMsgArray);
  64 #endif // wxUSE_THREADS
  65
  66 #if wxUSE_WX_RESOURCES
  67     #include "wx/resource.h"
  68 #endif
  69
  70 // OLE is used for drag-and-drop, clipboard, OLE Automation...
  71 #ifndef wxUSE_NORLANDER_HEADERS
  72 #if defined(__GNUWIN32__) || defined(__SC__) || defined(__SALFORDC__)
  73     #undef wxUSE_OLE
  74
  75     #define  wxUSE_OLE 0
  76 #endif // broken compilers
  77 #endif
  78
  79 #if wxUSE_OLE
  80     #include <ole2.h>
  81 #endif
  82
  83 #include <string.h>
  84 #include <ctype.h>
  85
  86 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS)
  87     #include <commctrl.h>
  88 #endif
  89
  90 #include "wx/msw/msvcrt.h"
  91
  92 // ---------------------------------------------------------------------------
  93 // global variables
  94 // ---------------------------------------------------------------------------
  95
  96 extern wxChar *wxBuffer;
  97 extern wxChar *wxOsVersion;
  98 extern wxList *wxWinHandleList;
  99 extern wxList WXDLLEXPORT wxPendingDelete;
 100 extern void wxSetKeyboardHook(bool doIt);
 101 extern wxCursor *g_globalCursor;
 102
 103 MSG s_currentMsg;
 104 wxApp *wxTheApp = NULL;
 105
 106 // FIXME why not const? and not static?
 107
 108 // NB: all "NoRedraw" classes must have the same names as the "normal" classes
 109 //     with NR suffix - wxWindow::MSWCreate() supposes this
 110 wxChar wxFrameClassName[]         = wxT("wxFrameClass");
 111 wxChar wxFrameClassNameNoRedraw[] = wxT("wxFrameClassNR");
 112 wxChar wxMDIFrameClassName[]      = wxT("wxMDIFrameClass");
 113 wxChar wxMDIFrameClassNameNoRedraw[] = wxT("wxMDIFrameClassNR");
 114 wxChar wxMDIChildFrameClassName[] = wxT("wxMDIChildFrameClass");
 115 wxChar wxMDIChildFrameClassNameNoRedraw[] = wxT("wxMDIChildFrameClassNR");
 116 wxChar wxPanelClassName[]         = wxT("wxPanelClass");
 117 wxChar wxCanvasClassName[]        = wxT("wxCanvasClass");
 118
 119 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 120 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 121 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 122
 123 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 124 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 125 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 126
 127 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 128
 129 LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 130
 131 #if wxUSE_RICHEDIT
 132     // the handle to richedit DLL and the version of the DLL loaded
 133     static HINSTANCE gs_hRichEdit = (HINSTANCE)NULL;
 134     static int gs_verRichEdit = -1;
 135 #endif
 136
 137 // ===========================================================================
 138 // implementation
 139 // ===========================================================================
 140
 141 // ---------------------------------------------------------------------------
 142 // wxApp
 143 // ---------------------------------------------------------------------------
 144
 145 #if !USE_SHARED_LIBRARY
 146     IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 147
 148     BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 149         EVT_IDLE(wxApp::OnIdle)
 150         EVT_END_SESSION(wxApp::OnEndSession)
 151         EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 152     END_EVENT_TABLE()
 153 #endif
 154
 155 //// Initialize
 156 bool wxApp::Initialize()
 157 {
 158     // Some people may wish to use this, but
 159     // probably it shouldn't be here by default.
 160 #ifdef __WXDEBUG__
 161     //    wxRedirectIOToConsole();
 162 #endif
 163
 164     wxBuffer = new wxChar[1500]; // FIXME
 165
 166     wxClassInfo::InitializeClasses();
 167
 168 #if wxUSE_RESOURCES
 169     wxGetResource(wxT("wxWindows"), wxT("OsVersion"), &wxOsVersion);
 170 #endif
 171
 172 #if wxUSE_THREADS
 173     wxPendingEventsLocker = new wxCriticalSection;
 174 #endif
 175
 176     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 177     wxTheColourDatabase->Initialize();
 178
 179     wxInitializeStockLists();
 180     wxInitializeStockObjects();
 181
 182 #if wxUSE_WX_RESOURCES
 183     wxInitializeResourceSystem();
 184 #endif
 185
 186     wxBitmap::InitStandardHandlers();
 187
 188 #if defined(__WIN95__)
 189     InitCommonControls();
 190
 191 #endif // __WIN95__
 192
 193 #if wxUSE_OLE
 194
 195 #ifdef __WIN16__
 196     // for OLE, enlarge message queue to be as large as possible
 197     int iMsg = 96;
 198     while (!SetMessageQueue(iMsg) && (iMsg -= 8))
 199         ;
 200 #endif // Win16
 201     // we need to initialize OLE library
 202     if ( FAILED(::OleInitialize(NULL)) )
 203         wxLogError(_("Cannot initialize OLE"));
 204 #endif // wxUSE_OLE
 205
 206 #if wxUSE_CTL3D
 207     if (!Ctl3dRegister(wxhInstance))
 208         wxLogError(wxT("Cannot register CTL3D"));
 209
 210     Ctl3dAutoSubclass(wxhInstance);
 211 #endif
 212
 213     g_globalCursor = new wxCursor;
 214
 215     // VZ: these icons are not in wx.rc anyhow (but should they?)!
 216 #if 0
 217     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
 218     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
 219     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
 220
 221     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
 222     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
 223     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDICHILDFRAME"));
 224 #endif // 0
 225
 226     RegisterWindowClasses();
 227
 228     // Create the brush for disabling bitmap buttons
 229
 230     LOGBRUSH lb;
 231     lb.lbStyle = BS_PATTERN;
 232     lb.lbHatch = (int)LoadBitmap( wxhInstance, wxT("wxDISABLE_BUTTON_BITMAP") );
 233     if ( lb.lbHatch )
 234     {
 235         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 236         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 237     }
 238     //else: wxWindows resources are probably not linked in
 239
 240 #if wxUSE_PENWINDOWS
 241     wxRegisterPenWin();
 242 #endif
 243
 244     wxWinHandleList = new wxList(wxKEY_INTEGER);
 245
 246     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 247     // PLEASE DO NOT ALTER THIS.
 248 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 249     extern char wxDummyChar;
 250     if (wxDummyChar) wxDummyChar++;
 251 #endif
 252
 253     wxSetKeyboardHook(TRUE);
 254
 255     wxModule::RegisterModules();
 256     if (!wxModule::InitializeModules())
 257         return FALSE;
 258     return TRUE;
 259 }
 260
 261 // ---------------------------------------------------------------------------
 262 // RegisterWindowClasses
 263 // ---------------------------------------------------------------------------
 264
 265 // TODO we should only register classes really used by the app. For this it
 266 //      would be enough to just delay the class registration until an attempt
 267 //      to create a window of this class is made.
 268 bool wxApp::RegisterWindowClasses()
 269 {
 270     WNDCLASS wndclass;
 271
 272     // for each class we register one with CS_(V|H)REDRAW style and one
 273     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 274     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 275     static const long styleNoRedraw = CS_DBLCLKS;
 276
 277     // the fields which are common to all classes
 278     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 279     wndclass.cbClsExtra    = 0;
 280     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 281     wndclass.hInstance     = wxhInstance;
 282     wndclass.hIcon         = (HICON) NULL;
 283     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 284     wndclass.lpszMenuName  = NULL;
 285
 286     // Register the frame window class.
 287     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 288     wndclass.lpszClassName = wxFrameClassName;
 289     wndclass.style         = styleNormal;
 290
 291     if ( !RegisterClass(&wndclass) )
 292     {
 293         wxLogLastError("RegisterClass(frame)");
 294
 295         return FALSE;
 296     }
 297
 298     // "no redraw" frame
 299     wndclass.lpszClassName = wxFrameClassNameNoRedraw;
 300     wndclass.style         = styleNoRedraw;
 301
 302     if ( !RegisterClass(&wndclass) )
 303     {
 304         wxLogLastError("RegisterClass(no redraw frame)");
 305
 306         return FALSE;
 307     }
 308
 309     // Register the MDI frame window class.
 310     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 311     wndclass.lpszClassName = wxMDIFrameClassName;
 312     wndclass.style         = styleNormal;
 313
 314     if ( !RegisterClass(&wndclass) )
 315     {
 316         wxLogLastError("RegisterClass(MDI parent)");
 317
 318         return FALSE;
 319     }
 320
 321     // "no redraw" MDI frame
 322     wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
 323     wndclass.style         = styleNoRedraw;
 324
 325     if ( !RegisterClass(&wndclass) )
 326     {
 327         wxLogLastError("RegisterClass(no redraw MDI parent frame)");
 328
 329         return FALSE;
 330     }
 331
 332     // Register the MDI child frame window class.
 333     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 334     wndclass.lpszClassName = wxMDIChildFrameClassName;
 335     wndclass.style         = styleNormal;
 336
 337     if ( !RegisterClass(&wndclass) )
 338     {
 339         wxLogLastError("RegisterClass(MDI child)");
 340
 341         return FALSE;
 342     }
 343
 344     // "no redraw" MDI child frame
 345     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 346     wndclass.style         = styleNoRedraw;
 347
 348     if ( !RegisterClass(&wndclass) )
 349     {
 350         wxLogLastError("RegisterClass(no redraw MDI child)");
 351
 352         return FALSE;
 353     }
 354
 355     // Register the panel window class.
 356     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 357     wndclass.lpszClassName = wxPanelClassName;
 358     wndclass.style         = styleNormal;
 359
 360     if ( !RegisterClass(&wndclass) )
 361     {
 362         wxLogLastError("RegisterClass(panel)");
 363
 364         return FALSE;
 365     }
 366
 367     // Register the canvas and textsubwindow class name
 368     wndclass.hbrBackground = (HBRUSH)NULL;
 369     wndclass.lpszClassName = wxCanvasClassName;
 370
 371     if ( !RegisterClass(&wndclass) )
 372     {
 373         wxLogLastError("RegisterClass(canvas)");
 374
 375         return FALSE;
 376     }
 377
 378     return TRUE;
 379 }
 380
 381 // ---------------------------------------------------------------------------
 382 // Convert Windows to argc, argv style
 383 // ---------------------------------------------------------------------------
 384
 385 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 386 {
 387     wxStringList args;
 388
 389     wxString cmdLine(lpCmdLine);
 390     int count = 0;
 391
 392     // Get application name
 393     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 394     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 395
 396     args.Add(name);
 397     count++;
 398
 399     wxStrcpy(name, wxFileNameFromPath(name));
 400     wxStripExtension(name);
 401     wxTheApp->SetAppName(name);
 402
 403     // Break up string
 404     // Treat strings enclosed in double-quotes as single arguments
 405     int i = 0;
 406     int len = cmdLine.Length();
 407     while (i < len)
 408     {
 409         // Skip whitespace
 410         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 411             i ++;
 412
 413         if (i < len)
 414         {
 415             if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
 416             {
 417                 i ++;
 418                 int first = i;
 419                 while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
 420                     i ++;
 421
 422                 wxString arg(cmdLine.Mid(first, (i - first)));
 423
 424                 args.Add(arg);
 425                 count ++;
 426
 427                 if (i < len)
 428                     i ++; // Skip past 2nd quote
 429             }
 430             else // Unquoted argument
 431             {
 432                 int first = i;
 433                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 434                     i ++;
 435
 436                 wxString arg(cmdLine.Mid(first, (i - first)));
 437
 438                 args.Add(arg);
 439                 count ++;
 440             }
 441         }
 442     }
 443
 444     wxTheApp->argv = new wxChar*[count + 1];
 445     for (i = 0; i < count; i++)
 446     {
 447         wxString arg(args[i]);
 448         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 449     }
 450     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 451     wxTheApp->argc = count;
 452 }
 453
 454 //// Cleans up any wxWindows internal structures left lying around
 455
 456 void wxApp::CleanUp()
 457 {
 458     //// COMMON CLEANUP
 459
 460 #if wxUSE_LOG
 461     // flush the logged messages if any and install a 'safer' log target: the
 462     // default one (wxLogGui) can't be used after the resources are freed just
 463     // below and the user suppliedo ne might be even more unsafe (using any
 464     // wxWindows GUI function is unsafe starting from now)
 465     wxLog::DontCreateOnDemand();
 466
 467     // this will flush the old messages if any
 468     delete wxLog::SetActiveTarget(new wxLogStderr);
 469 #endif // wxUSE_LOG
 470
 471     // One last chance for pending objects to be cleaned up
 472     wxTheApp->DeletePendingObjects();
 473
 474     wxModule::CleanUpModules();
 475
 476 #if wxUSE_WX_RESOURCES
 477     wxCleanUpResourceSystem();
 478
 479     //  wxDefaultResourceTable->ClearTable();
 480 #endif
 481
 482     // Indicate that the cursor can be freed, so that cursor won't be deleted
 483     // by deleting the bitmap list before g_globalCursor goes out of scope
 484     // (double deletion of the cursor).
 485     wxSetCursor(wxNullCursor);
 486     delete g_globalCursor;
 487     g_globalCursor = NULL;
 488
 489     wxDeleteStockObjects();
 490
 491     // Destroy all GDI lists, etc.
 492     wxDeleteStockLists();
 493
 494     delete wxTheColourDatabase;
 495     wxTheColourDatabase = NULL;
 496
 497     wxBitmap::CleanUpHandlers();
 498
 499     delete[] wxBuffer;
 500     wxBuffer = NULL;
 501
 502     //// WINDOWS-SPECIFIC CLEANUP
 503
 504     wxSetKeyboardHook(FALSE);
 505
 506 #if wxUSE_RICHEDIT
 507     if (gs_hRichEdit != (HINSTANCE) NULL)
 508         FreeLibrary(gs_hRichEdit);
 509 #endif
 510
 511 #if wxUSE_PENWINDOWS
 512     wxCleanUpPenWin();
 513 #endif
 514
 515     if (wxSTD_FRAME_ICON)
 516         DestroyIcon(wxSTD_FRAME_ICON);
 517     if (wxSTD_MDICHILDFRAME_ICON)
 518         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 519     if (wxSTD_MDIPARENTFRAME_ICON)
 520         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 521
 522     if (wxDEFAULT_FRAME_ICON)
 523         DestroyIcon(wxDEFAULT_FRAME_ICON);
 524     if (wxDEFAULT_MDICHILDFRAME_ICON)
 525         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 526     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 527         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 528
 529     if ( wxDisableButtonBrush )
 530         ::DeleteObject( wxDisableButtonBrush );
 531
 532 #if wxUSE_OLE
 533     ::OleUninitialize();
 534 #endif
 535
 536 #if wxUSE_CTL3D
 537     Ctl3dUnregister(wxhInstance);
 538 #endif
 539
 540     if (wxWinHandleList)
 541         delete wxWinHandleList;
 542
 543     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 544     // create a module for that as it's part of the core.
 545     delete wxPendingEvents;
 546 #if wxUSE_THREADS
 547     delete wxPendingEventsLocker;
 548     // If we don't do the following, we get an apparent memory leak.
 549     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 550 #endif
 551
 552     wxClassInfo::CleanUpClasses();
 553
 554     delete wxTheApp;
 555     wxTheApp = NULL;
 556
 557 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 558     // At this point we want to check if there are any memory
 559     // blocks that aren't part of the wxDebugContext itself,
 560     // as a special case. Then when dumping we need to ignore
 561     // wxDebugContext, too.
 562     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 563     {
 564         wxLogDebug(wxT("There were memory leaks."));
 565         wxDebugContext::Dump();
 566         wxDebugContext::PrintStatistics();
 567     }
 568     //  wxDebugContext::SetStream(NULL, NULL);
 569 #endif
 570
 571 #if wxUSE_LOG
 572     // do it as the very last thing because everything else can log messages
 573     delete wxLog::SetActiveTarget(NULL);
 574 #endif // wxUSE_LOG
 575 }
 576
 577 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 578
 579 // temporarily disable this warning which would be generated in release builds
 580 // because of __try
 581 #ifdef __VISUALC__
 582     #pragma warning(disable: 4715) // not all control paths return a value
 583 #endif // Visual C++
 584
 585 //// Main wxWindows entry point
 586 int wxEntry(WXHINSTANCE hInstance,
 587             WXHINSTANCE WXUNUSED(hPrevInstance),
 588             char *lpCmdLine,
 589             int nCmdShow,
 590             bool enterLoop)
 591 {
 592     // do check for memory leaks on program exit
 593     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 594     //  deallocated memory which may be used to simulate low-memory condition)
 595     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 596 #ifdef __MWERKS__
 597 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 598     // This seems to be necessary since there are 'rogue'
 599     // objects present at this point (perhaps global objects?)
 600     // Setting a checkpoint will ignore them as far as the
 601     // memory checking facility is concerned.
 602     // Of course you may argue that memory allocated in globals should be
 603     // checked, but this is a reasonable compromise.
 604     wxDebugContext::SetCheckpoint();
 605 #endif
 606 #endif
 607     // take everything into a try-except block in release build
 608     // FIXME other compilers must support Win32 SEH (structured exception
 609     //       handling) too, just find the appropriate keyword in their docs!
 610     //       Please note that it's _not_ the same as C++ exceptions!
 611 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 612     #define CATCH_PROGRAM_EXCEPTIONS
 613
 614     __try {
 615 #else
 616     #undef  CATCH_PROGRAM_EXCEPTIONS
 617 #endif
 618         wxhInstance = (HINSTANCE) hInstance;
 619
 620         if (!wxApp::Initialize())
 621             return 0;
 622
 623         // create the application object or ensure that one already exists
 624         if (!wxTheApp)
 625         {
 626             // The app may have declared a global application object, but we recommend
 627             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 628             // function for delayed, dynamic app object construction.
 629             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 630                          wxT("No initializer - use IMPLEMENT_APP macro.") );
 631
 632             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 633         }
 634
 635         wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
 636
 637         // save the WinMain() parameters
 638         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 639         wxTheApp->m_nCmdShow = nCmdShow;
 640
 641         // GUI-specific initialisation. In fact on Windows we don't have any,
 642         // but this call is provided for compatibility across platforms.
 643         wxTheApp->OnInitGui();
 644
 645         // We really don't want timestamps by default, because it means
 646         // we can't simply double-click on the error message and get to that
 647         // line in the source. So VC++ at least, let's have a sensible default.
 648 #ifdef __VISUALC__
 649         wxLog::SetTimestamp(NULL);
 650 #endif
 651
 652         int retValue = 0;
 653
 654         if ( wxTheApp->OnInit() )
 655         {
 656             if ( enterLoop )
 657             {
 658                 retValue = wxTheApp->OnRun();
 659             }
 660             else
 661                 // We want to initialize, but not run or exit immediately.
 662                 return 1;
 663         }
 664         //else: app initialization failed, so we skipped OnRun()
 665
 666         wxWindow *topWindow = wxTheApp->GetTopWindow();
 667         if ( topWindow )
 668         {
 669             // Forcibly delete the window.
 670             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 671                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 672             {
 673                 topWindow->Close(TRUE);
 674                 wxTheApp->DeletePendingObjects();
 675             }
 676             else
 677             {
 678                 delete topWindow;
 679                 wxTheApp->SetTopWindow(NULL);
 680             }
 681         }
 682
 683         wxTheApp->OnExit();
 684
 685         wxApp::CleanUp();
 686
 687         return retValue;
 688
 689 #ifdef CATCH_PROGRAM_EXCEPTIONS
 690     }
 691     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 692         /*
 693            if ( wxTheApp )
 694            wxTheApp->OnFatalException();
 695          */
 696
 697         // using wxLog would be unsafe here
 698         ::MessageBox(NULL,
 699                      _("Unrecoverable program error detected: "
 700                      " the application will terminate."),
 701                      _("Fatal Error"),
 702                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 703
 704         ::ExitProcess(3); // the same exit code as abort()
 705
 706         // NOTREACHED
 707     }
 708 #endif // CATCH_PROGRAM_EXCEPTIONS
 709 }
 710
 711 // restore warning state
 712 #ifdef __VISUALC__
 713     #pragma warning(default: 4715) // not all control paths return a value
 714 #endif // Visual C++
 715
 716 #else /*  _WINDLL  */
 717
 718 //// Entry point for DLLs
 719
 720 int wxEntry(WXHINSTANCE hInstance)
 721 {
 722     wxhInstance = (HINSTANCE) hInstance;
 723     wxApp::Initialize();
 724
 725     // The app may have declared a global application object, but we recommend
 726     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 727     // for delayed, dynamic app object construction.
 728     if (!wxTheApp)
 729     {
 730         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 731                      "No initializer - use IMPLEMENT_APP macro." );
 732
 733         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 734     }
 735
 736     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 737
 738     wxTheApp->argc = 0;
 739     wxTheApp->argv = NULL;
 740
 741     wxTheApp->OnInitGui();
 742
 743     wxTheApp->OnInit();
 744
 745     wxWindow *topWindow = wxTheApp->GetTopWindow();
 746     if ( topWindow && topWindow->GetHWND())
 747     {
 748         topWindow->Show(TRUE);
 749     }
 750
 751     return 1;
 752 }
 753 #endif // _WINDLL
 754
 755 //// Static member initialization
 756
 757 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 758
 759 wxApp::wxApp()
 760 {
 761     m_topWindow = NULL;
 762     wxTheApp = this;
 763     m_wantDebugOutput = TRUE;
 764
 765     argc = 0;
 766     argv = NULL;
 767     m_printMode = wxPRINT_WINDOWS;
 768     m_exitOnFrameDelete = TRUE;
 769     m_auto3D = TRUE;
 770 }
 771
 772 wxApp::~wxApp()
 773 {
 774     // Delete command-line args
 775     int i;
 776     for (i = 0; i < argc; i++)
 777     {
 778         delete[] argv[i];
 779     }
 780     delete[] argv;
 781 }
 782
 783 bool wxApp::Initialized()
 784 {
 785 #ifndef _WINDLL
 786     if (GetTopWindow())
 787         return TRUE;
 788     else
 789         return FALSE;
 790 #endif
 791 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 792     return TRUE;
 793 #endif
 794 }
 795
 796 /*
 797  * Get and process a message, returning FALSE if WM_QUIT
 798  * received (and also set the flag telling the app to exit the main loop)
 799  *
 800  */
 801 bool wxApp::DoMessage()
 802 {
 803     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 804     if ( rc == 0 )
 805     {
 806         // got WM_QUIT
 807         m_keepGoing = FALSE;
 808
 809         return FALSE;
 810     }
 811     else if ( rc == -1 )
 812     {
 813         // should never happen, but let's test for it nevertheless
 814         wxLogLastError("GetMessage");
 815     }
 816     else
 817     {
 818 #if wxUSE_THREADS
 819         wxASSERT_MSG( wxThread::IsMain(),
 820                       wxT("only the main thread can process Windows messages") );
 821
 822         static bool s_hadGuiLock = TRUE;
 823         static wxMsgArray s_aSavedMessages;
 824
 825         // if a secondary thread owns is doing GUI calls, save all messages for
 826         // later processing - we can't process them right now because it will
 827         // lead to recursive library calls (and we're not reentrant)
 828         if ( !wxGuiOwnedByMainThread() )
 829         {
 830             s_hadGuiLock = FALSE;
 831
 832             // leave out WM_COMMAND messages: too dangerous, sometimes
 833             // the message will be processed twice
 834             if ( !wxIsWaitingForThread() ||
 835                     s_currentMsg.message != WM_COMMAND )
 836             {
 837                 s_aSavedMessages.Add(s_currentMsg);
 838             }
 839
 840             return TRUE;
 841         }
 842         else
 843         {
 844             // have we just regained the GUI lock? if so, post all of the saved
 845             // messages
 846             //
 847             // FIXME of course, it's not _exactly_ the same as processing the
 848             //       messages normally - expect some things to break...
 849             if ( !s_hadGuiLock )
 850             {
 851                 s_hadGuiLock = TRUE;
 852
 853                 size_t count = s_aSavedMessages.Count();
 854                 for ( size_t n = 0; n < count; n++ )
 855                 {
 856                     MSG& msg = s_aSavedMessages[n];
 857
 858                     if ( !ProcessMessage((WXMSG *)&msg) )
 859                     {
 860                         ::TranslateMessage(&msg);
 861                         ::DispatchMessage(&msg);
 862                     }
 863                 }
 864
 865                 s_aSavedMessages.Empty();
 866             }
 867         }
 868 #endif // wxUSE_THREADS
 869
 870         // Process the message
 871         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 872         {
 873             ::TranslateMessage(&s_currentMsg);
 874             ::DispatchMessage(&s_currentMsg);
 875         }
 876     }
 877
 878     return TRUE;
 879 }
 880
 881 /*
 882  * Keep trying to process messages until WM_QUIT
 883  * received.
 884  *
 885  * If there are messages to be processed, they will all be
 886  * processed and OnIdle will not be called.
 887  * When there are no more messages, OnIdle is called.
 888  * If OnIdle requests more time,
 889  * it will be repeatedly called so long as there are no pending messages.
 890  * A 'feature' of this is that once OnIdle has decided that no more processing
 891  * is required, then it won't get processing time until further messages
 892  * are processed (it'll sit in DoMessage).
 893  */
 894
 895 int wxApp::MainLoop()
 896 {
 897     m_keepGoing = TRUE;
 898
 899     while ( m_keepGoing )
 900     {
 901 #if wxUSE_THREADS
 902         wxMutexGuiLeaveOrEnter();
 903 #endif // wxUSE_THREADS
 904
 905         while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 906                 ProcessIdle() )
 907         {
 908         }
 909
 910
 911         DoMessage();
 912     }
 913
 914     return s_currentMsg.wParam;
 915 }
 916
 917 // Returns TRUE if more time is needed.
 918 bool wxApp::ProcessIdle()
 919 {
 920     wxIdleEvent event;
 921     event.SetEventObject(this);
 922     ProcessEvent(event);
 923
 924     return event.MoreRequested();
 925 }
 926
 927 void wxApp::ExitMainLoop()
 928 {
 929     m_keepGoing = FALSE;
 930 }
 931
 932 bool wxApp::Pending()
 933 {
 934     return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0);
 935 }
 936
 937 void wxApp::Dispatch()
 938 {
 939     DoMessage();
 940 }
 941
 942 /*
 943  * Give all windows a chance to preprocess
 944  * the message. Some may have accelerator tables, or have
 945  * MDI complications.
 946  */
 947
 948 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 949 {
 950     MSG *msg = (MSG *)wxmsg;
 951     HWND hWnd = msg->hwnd;
 952     wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
 953
 954     // for some composite controls (like a combobox), wndThis might be NULL
 955     // because the subcontrol is not a wxWindow, but only the control itself
 956     // is - try to catch this case
 957     while ( hWnd && !wndThis )
 958     {
 959         hWnd = ::GetParent(hWnd);
 960         wndThis = wxFindWinFromHandle((WXHWND)hWnd);
 961     }
 962
 963     // Try translations first; find the youngest window with
 964     // a translation table.
 965     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 966     {
 967         if ( wnd->MSWTranslateMessage(wxmsg) )
 968             return TRUE;
 969     }
 970
 971     // Anyone for a non-translation message? Try youngest descendants first.
 972     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 973     {
 974         if ( wnd->MSWProcessMessage(wxmsg) )
 975             return TRUE;
 976     }
 977
 978     return FALSE;
 979 }
 980
 981 void wxApp::OnIdle(wxIdleEvent& event)
 982 {
 983     static bool s_inOnIdle = FALSE;
 984
 985     // Avoid recursion (via ProcessEvent default case)
 986     if ( s_inOnIdle )
 987         return;
 988
 989     s_inOnIdle = TRUE;
 990
 991     // 'Garbage' collection of windows deleted with Close().
 992     DeletePendingObjects();
 993
 994 #if wxUSE_LOG
 995     // flush the logged messages if any
 996     wxLog *pLog = wxLog::GetActiveTarget();
 997     if ( pLog != NULL && pLog->HasPendingMessages() )
 998         pLog->Flush();
 999 #endif // wxUSE_LOG
1000
1001     // Send OnIdle events to all windows
1002     if ( SendIdleEvents() )
1003     {
1004         // SendIdleEvents() returns TRUE if at least one window requested more
1005         // idle events
1006         event.RequestMore(TRUE);
1007     }
1008
1009     // If they are pending events, we must process them: pending events are
1010     // either events to the threads other than main or events posted with
1011     // wxPostEvent() functions
1012     ProcessPendingEvents();
1013
1014     s_inOnIdle = FALSE;
1015 }
1016
1017 // Send idle event to all top-level windows
1018 bool wxApp::SendIdleEvents()
1019 {
1020     bool needMore = FALSE;
1021
1022     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1023     while (node)
1024     {
1025         wxWindow* win = node->GetData();
1026         if (SendIdleEvents(win))
1027             needMore = TRUE;
1028         node = node->GetNext();
1029     }
1030
1031     return needMore;
1032 }
1033
1034 // Send idle event to window and all subwindows
1035 bool wxApp::SendIdleEvents(wxWindow* win)
1036 {
1037     bool needMore = FALSE;
1038
1039     wxIdleEvent event;
1040     event.SetEventObject(win);
1041     win->GetEventHandler()->ProcessEvent(event);
1042
1043     if (event.MoreRequested())
1044         needMore = TRUE;
1045
1046     wxNode* node = win->GetChildren().First();
1047     while (node)
1048     {
1049         wxWindow* win = (wxWindow*) node->Data();
1050         if (SendIdleEvents(win))
1051             needMore = TRUE;
1052
1053         node = node->Next();
1054     }
1055     return needMore;
1056 }
1057
1058 void wxApp::DeletePendingObjects()
1059 {
1060     wxNode *node = wxPendingDelete.First();
1061     while (node)
1062     {
1063         wxObject *obj = (wxObject *)node->Data();
1064
1065         delete obj;
1066
1067         if (wxPendingDelete.Member(obj))
1068             delete node;
1069
1070         // Deleting one object may have deleted other pending
1071         // objects, so start from beginning of list again.
1072         node = wxPendingDelete.First();
1073     }
1074 }
1075
1076 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1077 {
1078     if (GetTopWindow())
1079         GetTopWindow()->Close(TRUE);
1080 }
1081
1082 // Default behaviour: close the application with prompts. The
1083 // user can veto the close, and therefore the end session.
1084 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1085 {
1086     if (GetTopWindow())
1087     {
1088         if (!GetTopWindow()->Close(!event.CanVeto()))
1089             event.Veto(TRUE);
1090     }
1091 }
1092
1093 #if wxUSE_RICHEDIT
1094
1095 /* static */
1096 bool wxApp::InitRichEdit(int version)
1097 {
1098     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1099                  _T("incorrect richedit control version requested") );
1100
1101     if ( version <= gs_verRichEdit )
1102     {
1103         // we've already got this or better
1104         return TRUE;
1105     }
1106
1107     if ( gs_hRichEdit )
1108     {
1109         ::FreeLibrary(gs_hRichEdit);
1110     }
1111
1112     // always try load riched20.dll first - like this we won't have to reload
1113     // it later if we're first asked for RE 1 and then for RE 2 or 3
1114     wxString dllname = _T("riched20.dll");
1115     gs_hRichEdit = ::LoadLibrary(dllname);
1116     if ( !gs_hRichEdit && (version == 1) )
1117     {
1118         // fall back to RE 1
1119         dllname = _T("riched32.dll");
1120         gs_hRichEdit = ::LoadLibrary(dllname);
1121     }
1122
1123     if ( !gs_hRichEdit )
1124     {
1125         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1126
1127         gs_verRichEdit = -1;
1128
1129         return FALSE;
1130     }
1131
1132     gs_verRichEdit = version;
1133
1134     return TRUE;
1135 }
1136
1137 #endif // wxUSE_RICHEDIT
1138
1139 /* static */
1140 int wxApp::GetComCtl32Version()
1141 {
1142     // TODO should use DllGetVersion() instead of this hack
1143
1144     // cache the result
1145     static int s_verComCtl32 = -1;      // MT-FIXME
1146
1147     if ( s_verComCtl32 == -1 )
1148     {
1149         s_verComCtl32 = 0;
1150
1151         // have we loaded COMCTL32 yet?
1152         HMODULE theModule = ::GetModuleHandle(wxT("COMCTL32"));
1153
1154         // if so, then we can check for the version
1155         if (theModule)
1156         {
1157             // InitCommonControlsEx is unique to 4.7 and later
1158             FARPROC theProc = ::GetProcAddress(theModule,
1159                                                _T("InitCommonControlsEx"));
1160
1161             if ( !theProc )
1162             {                    // not found, must be 4.00
1163                 s_verComCtl32 = 400;
1164             }
1165             else
1166             {
1167                 // The following symbol are unique to 4.71
1168                 //   DllInstall
1169                 //   FlatSB_EnableScrollBar FlatSB_GetScrollInfo FlatSB_GetScrollPos
1170                 //   FlatSB_GetScrollProp FlatSB_GetScrollRange FlatSB_SetScrollInfo
1171                 //   FlatSB_SetScrollPos FlatSB_SetScrollProp FlatSB_SetScrollRange
1172                 //   FlatSB_ShowScrollBar
1173                 //   _DrawIndirectImageList _DuplicateImageList
1174                 //   InitializeFlatSB
1175                 //   UninitializeFlatSB
1176                 // we could check for any of these - I chose DllInstall
1177                 FARPROC theProc = ::GetProcAddress(theModule, _T("DllInstall"));
1178                 if ( !theProc )
1179                 {
1180                     // not found, must be 4.70
1181                     s_verComCtl32 = 470;
1182                 }
1183                 else
1184                 {                         // found, must be 4.71
1185                     s_verComCtl32 = 471;
1186                 }
1187             }
1188         }
1189     }
1190
1191     return s_verComCtl32;
1192 }
1193
1194 void wxExit()
1195 {
1196     wxLogError(_("Fatal error: exiting"));
1197
1198     wxApp::CleanUp();
1199 }
1200
1201 // Yield to incoming messages
1202 bool wxYield()
1203 {
1204     // we don't want to process WM_QUIT from here - it should be processed in
1205     // the main event loop in order to stop it
1206
1207     MSG msg;
1208     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
1209             msg.message != WM_QUIT )
1210     {
1211         if ( !wxTheApp->DoMessage() )
1212             break;
1213     }
1214
1215     // If they are pending events, we must process them.
1216     wxTheApp->ProcessPendingEvents();
1217
1218     return TRUE;
1219 }
1220
1221 //-----------------------------------------------------------------------------
1222 // wxWakeUpIdle
1223 //-----------------------------------------------------------------------------
1224
1225 void wxWakeUpIdle()
1226 {
1227     // Send the top window a dummy message so idle handler processing will
1228     // start up again.  Doing it this way ensures that the idle handler
1229     // wakes up in the right thread (see also wxWakeUpMainThread() which does
1230     // the same for the main app thread only)
1231     wxWindow *topWindow = wxTheApp->GetTopWindow();
1232     if ( topWindow )
1233     {
1234         if ( !::PostMessage(GetHwndOf(topWindow), WM_NULL, 0, 0) )
1235         {
1236             // should never happen
1237             wxLogLastError("PostMessage(WM_NULL)");
1238         }
1239     }
1240 }
1241
1242 //-----------------------------------------------------------------------------
1243
1244 wxIcon
1245 wxApp::GetStdIcon(int which) const
1246 {
1247     switch(which)
1248     {
1249         case wxICON_INFORMATION:
1250             return wxIcon("wxICON_INFO");
1251
1252         case wxICON_QUESTION:
1253             return wxIcon("wxICON_QUESTION");
1254
1255         case wxICON_EXCLAMATION:
1256             return wxIcon("wxICON_WARNING");
1257
1258         default:
1259             wxFAIL_MSG(wxT("requested non existent standard icon"));
1260             // still fall through
1261
1262         case wxICON_HAND:
1263             return wxIcon("wxICON_ERROR");
1264     }
1265 }
1266
1267 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1268 // if in a separate file. So include it here to ensure it's linked.
1269 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
1270 #include "main.cpp"
1271 #endif