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