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 #ifdef __GNUG__
  13 #pragma implementation "app.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #if defined(__BORLANDC__)
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24   #include "wx/frame.h"
  25   #include "wx/app.h"
  26   #include "wx/utils.h"
  27   #include "wx/gdicmn.h"
  28   #include "wx/pen.h"
  29   #include "wx/brush.h"
  30   #include "wx/cursor.h"
  31   #include "wx/icon.h"
  32   #include "wx/palette.h"
  33   #include "wx/dc.h"
  34   #include "wx/dialog.h"
  35   #include "wx/msgdlg.h"
  36   #include "wx/intl.h"
  37 #endif
  38
  39 #include "wx/msw/private.h"
  40 #include "wx/log.h"
  41 #include "wx/module.h"
  42
  43 #if wxUSE_THREADS
  44     #include "wx/thread.h"
  45
  46     // define the array of MSG strutures
  47     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
  48
  49     #include "wx/arrimpl.cpp"
  50
  51     WX_DEFINE_OBJARRAY(wxMsgArray);
  52 #endif // wxUSE_THREADS
  53
  54 #if wxUSE_WX_RESOURCES
  55   #include "wx/resource.h"
  56 #endif
  57
  58 // To UG: there's no point in putting this #if here
  59 // if you don't do the same for the Ole calls further down.
  60 // Also, OLE is used not just for drag and drop (it's used by automatn.cpp).
  61 // #if wxUSE_DRAG_AND_DROP
  62 #if !defined(__GNUWIN32__) && !defined(__SC__) && !defined(__SALFORDC__)
  63 #include <ole2.h>
  64 #endif
  65
  66 // #endif
  67
  68 #include <string.h>
  69 #include <ctype.h>
  70
  71 #if defined(__WIN95__) && !defined(__GNUWIN32__)
  72   #include <commctrl.h>
  73 #endif
  74
  75 // use debug CRT functions for memory leak detections in VC++ if we're not
  76 // using wxWindows own methods
  77 #if defined(__WXDEBUG__) && defined(_MSC_VER) && !wxUSE_GLOBAL_MEMORY_OPERATORS && !defined(__NO_VC_CRTDBG__)
  78     #define wxUSE_VC_CRTDBG
  79 #else
  80     #undef wxUSE_VC_CRTDBG
  81 #endif
  82
  83 #ifdef wxUSE_VC_CRTDBG
  84   // VC++ uses this macro as debug/release mode indicator
  85   #ifndef _DEBUG
  86     #define _DEBUG
  87   #endif
  88
  89   /* Need to undef new if including crtdbg.h */
  90   #ifdef new
  91     #undef new
  92   #endif
  93
  94   #include <crtdbg.h>
  95
  96   #if defined(__WXDEBUG__) && wxUSE_GLOBAL_MEMORY_OPERATORS && wxUSE_DEBUG_NEW_ALWAYS
  97     #define new new(__FILE__,__LINE__)
  98   #endif
  99 #endif // wxUSE_VC_CRTDBG
 100
 101 extern char *wxBuffer;
 102 extern char *wxOsVersion;
 103 extern wxList *wxWinHandleList;
 104 extern wxList WXDLLEXPORT wxPendingDelete;
 105 extern void wxSetKeyboardHook(bool doIt);
 106 extern wxCursor *g_globalCursor;
 107
 108 HINSTANCE wxhInstance = 0;
 109 static MSG s_currentMsg;
 110 wxApp *wxTheApp = NULL;
 111
 112 // @@ why not const? and not static?
 113 char wxFrameClassName[]         = "wxFrameClass";
 114 char wxMDIFrameClassName[]      = "wxMDIFrameClass";
 115 char wxMDIChildFrameClassName[] = "wxMDIChildFrameClass";
 116 char wxPanelClassName[]         = "wxPanelClass";
 117 char wxCanvasClassName[]        = "wxCanvasClass";
 118
 119 HICON wxSTD_FRAME_ICON = NULL;
 120 HICON wxSTD_MDICHILDFRAME_ICON = NULL;
 121 HICON wxSTD_MDIPARENTFRAME_ICON = NULL;
 122
 123 HICON wxDEFAULT_FRAME_ICON = NULL;
 124 HICON wxDEFAULT_MDICHILDFRAME_ICON = NULL;
 125 HICON wxDEFAULT_MDIPARENTFRAME_ICON = NULL;
 126
 127 HBRUSH wxDisableButtonBrush = 0;
 128
 129 LRESULT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 130
 131 #if !USE_SHARED_LIBRARY
 132   IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 133
 134   BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 135       EVT_IDLE(wxApp::OnIdle)
 136       EVT_END_SESSION(wxApp::OnEndSession)
 137       EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 138   END_EVENT_TABLE()
 139 #endif
 140
 141 long wxApp::sm_lastMessageTime = 0;
 142
 143 #ifdef __WIN95__
 144   static HINSTANCE gs_hRichEdit = NULL;
 145 #endif
 146
 147 //// Initialize
 148
 149 bool wxApp::Initialize()
 150 {
 151     // Some people may wish to use this, but
 152     // probably it shouldn't be here by default.
 153 #ifdef __WXDEBUG__
 154 //    wxRedirectIOToConsole();
 155 #endif
 156
 157     wxBuffer = new char[1500];
 158
 159 #ifdef wxUSE_VC_CRTDBG
 160     // do check for memory leaks on program exit
 161     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 162     //  deallocated memory which may be used to simulate low-memory condition)
 163     _CrtSetDbgFlag(_CrtSetDbgFlag(_CRTDBG_REPORT_FLAG) | _CRTDBG_LEAK_CHECK_DF);
 164 #endif // debug build under MS VC++
 165
 166     wxClassInfo::InitializeClasses();
 167
 168 #if wxUSE_RESOURCES
 169     wxGetResource("wxWindows", "OsVersion", &wxOsVersion);
 170 #endif
 171
 172     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 173     wxTheColourDatabase->Initialize();
 174
 175     wxInitializeStockLists();
 176     wxInitializeStockObjects();
 177
 178 #if wxUSE_WX_RESOURCES
 179     wxInitializeResourceSystem();
 180 #endif
 181
 182     wxBitmap::InitStandardHandlers();
 183
 184 #if defined(__WIN95__)
 185     InitCommonControls();
 186     gs_hRichEdit = LoadLibrary("RICHED32.DLL");
 187
 188     if (gs_hRichEdit == NULL)
 189     {
 190       wxMessageBox("Could not initialise Rich Edit DLL");
 191     }
 192 #endif
 193
 194     int iMsg = 96;
 195
 196    // for OLE, enlarge message queue to be as large as possible
 197    while (!SetMessageQueue(iMsg) && (iMsg -= 8));
 198
 199 /*
 200     DWORD dwOleVer;
 201     dwOleVer = CoBuildVersion();
 202
 203     // check the OLE library version
 204     if (rmm != HIWORD(dwOleVer))
 205     {
 206         wxMessageBox("Incorrect version of OLE libraries.");
 207         return FALSE;
 208     }
 209 */
 210
 211 #if !defined(__GNUWIN32__) && !defined(__SC__) && !defined(__SALFORDC__)
 212     // we need to initialize OLE library
 213     if ( FAILED(::OleInitialize(NULL)) )
 214       wxFatalError(_("Cannot initialize OLE"));
 215 #endif
 216
 217 #if CTL3D
 218     if (!Ctl3dRegister(wxhInstance))
 219       wxFatalError("Cannot register CTL3D");
 220
 221     Ctl3dAutoSubclass(wxhInstance);
 222 #endif
 223
 224     g_globalCursor = new wxCursor;
 225
 226     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, "wxSTD_FRAME");
 227     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, "wxSTD_MDIPARENTFRAME");
 228     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, "wxSTD_MDICHILDFRAME");
 229
 230     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_FRAME");
 231     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_MDIPARENTFRAME");
 232     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_MDICHILDFRAME");
 233
 234     RegisterWindowClasses();
 235
 236     // Create the brush for disabling bitmap buttons
 237
 238     LOGBRUSH lb ;
 239     lb.lbStyle = BS_PATTERN;
 240     lb.lbHatch = (int)LoadBitmap( wxhInstance, "wxDISABLE_BUTTON_BITMAP" ) ;
 241     wxDisableButtonBrush = ::CreateBrushIndirect( & lb ) ;
 242     ::DeleteObject( (HGDIOBJ)lb.lbHatch ) ;
 243
 244 #if wxUSE_PENWINDOWS
 245     wxRegisterPenWin();
 246 #endif
 247
 248     wxWinHandleList = new wxList(wxKEY_INTEGER);
 249
 250     // This is to foil optimizations in Visual C++ that
 251     // throw out dummy.obj.
 252 #if defined(_MSC_VER) && !defined(WXMAKINGDLL)
 253     extern char wxDummyChar;
 254     if (wxDummyChar) wxDummyChar++;
 255 #endif
 256
 257     wxSetKeyboardHook(TRUE);
 258
 259     wxModule::RegisterModules();
 260     if (!wxModule::InitializeModules())
 261         return FALSE;
 262     return TRUE;
 263 }
 264
 265 //// RegisterWindowClasses
 266
 267 bool wxApp::RegisterWindowClasses()
 268 {
 269 ///////////////////////////////////////////////////////////////////////
 270 // Register the frame window class.
 271   WNDCLASS wndclass;   // Structure used to register Windows class.
 272
 273   wndclass.style         = CS_HREDRAW | CS_VREDRAW;
 274   wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 275   wndclass.cbClsExtra    = 0;
 276   wndclass.cbWndExtra    = sizeof( DWORD ); // was 4
 277   wndclass.hInstance     = wxhInstance;
 278   wndclass.hIcon         = NULL;        // wxSTD_FRAME_ICON;
 279   wndclass.hCursor       = LoadCursor( NULL, IDC_ARROW );
 280   wndclass.hbrBackground =  (HBRUSH)(COLOR_APPWORKSPACE+1) ;
 281 //  wndclass.hbrBackground = GetStockObject( WHITE_BRUSH );
 282   wndclass.lpszMenuName  = NULL;
 283 #ifdef _MULTIPLE_INSTANCES
 284   sprintf( wxFrameClassName,"wxFrameClass%d", wxhInstance );
 285 #endif
 286   wndclass.lpszClassName = wxFrameClassName;
 287
 288   if (!RegisterClass( &wndclass ))
 289   {
 290     // wxFatalError("Can't register Frame Window class");
 291   }
 292
 293 ///////////////////////////////////////////////////////////////////////
 294 // Register the MDI frame window class.
 295   WNDCLASS wndclass1;   // Structure used to register Windows class.
 296
 297   wndclass1.style         = CS_HREDRAW | CS_VREDRAW;
 298   wndclass1.lpfnWndProc   = (WNDPROC)wxWndProc;
 299   wndclass1.cbClsExtra    = 0;
 300   wndclass1.cbWndExtra    = sizeof( DWORD ); // was 4
 301   wndclass1.hInstance     = wxhInstance;
 302   wndclass1.hIcon         = NULL; // wxSTD_MDIPARENTFRAME_ICON;
 303   wndclass1.hCursor       = LoadCursor( NULL, IDC_ARROW );
 304 //  wndclass1.hbrBackground =  (HBRUSH)(COLOR_APPWORKSPACE+1) ;
 305   wndclass1.hbrBackground = NULL;
 306   wndclass1.lpszMenuName  = NULL;
 307
 308   wndclass1.lpszClassName = wxMDIFrameClassName;
 309   if (!RegisterClass( &wndclass1 ))
 310   {
 311 //    wxFatalError("Can't register MDI Frame window class");
 312 //  return FALSE;
 313   }
 314
 315 ///////////////////////////////////////////////////////////////////////
 316 // Register the MDI child frame window class.
 317   WNDCLASS wndclass4;   // Structure used to register Windows class.
 318
 319   wndclass4.style         = CS_HREDRAW | CS_VREDRAW;
 320   wndclass4.lpfnWndProc   = (WNDPROC)wxWndProc;
 321   wndclass4.cbClsExtra    = 0;
 322   wndclass4.cbWndExtra    = sizeof( DWORD ); // was 4
 323   wndclass4.hInstance     = wxhInstance;
 324   wndclass4.hIcon         = NULL;       // wxSTD_MDICHILDFRAME_ICON;
 325   wndclass4.hCursor       = LoadCursor( NULL, IDC_ARROW );
 326   // TODO: perhaps this should be NULL so that Windows doesn't
 327   // paint the background itself (would OnEraseBackground duplicate
 328   // this?)
 329   wndclass4.hbrBackground =  (HBRUSH)(COLOR_WINDOW+1) ;
 330 //  wndclass4.hbrBackground = NULL;
 331   wndclass4.lpszMenuName  = NULL;
 332   wndclass4.lpszClassName = wxMDIChildFrameClassName;
 333
 334   if (!RegisterClass( &wndclass4 ))
 335   {
 336 //   wxFatalError("Can't register MDI child frame window class");
 337 //   return FALSE;
 338   }
 339
 340 ///////////////////////////////////////////////////////////////////////
 341 // Register the panel window class.
 342   WNDCLASS wndclass2;   // Structure used to register Windows class.
 343   memset(&wndclass2, 0, sizeof(WNDCLASS));   // start with NULL defaults
 344   // Use CS_OWNDC to avoid messing about restoring the context
 345   // for every graphic operation.
 346   wndclass2.style         = CS_HREDRAW | CS_VREDRAW;
 347   wndclass2.lpfnWndProc   = (WNDPROC)wxWndProc;
 348   wndclass2.cbClsExtra    = 0;
 349   wndclass2.cbWndExtra    = sizeof( DWORD ); // was 4
 350   wndclass2.hInstance     = wxhInstance;
 351   wndclass2.hIcon         = NULL;
 352   wndclass2.hCursor       = NULL;
 353 //  wndclass2.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1) ;
 354   wndclass2.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 355   wndclass2.lpszMenuName  = NULL;
 356   wndclass2.lpszClassName = wxPanelClassName;
 357   if (!RegisterClass( &wndclass2 ))
 358   {
 359 //   wxFatalError("Can't register Panel Window class");
 360 //   return FALSE;
 361   }
 362
 363 ///////////////////////////////////////////////////////////////////////
 364 // Register the canvas and textsubwindow class name
 365   WNDCLASS wndclass3;   // Structure used to register Windows class.
 366   memset(&wndclass3, 0, sizeof(WNDCLASS));   // start with NULL defaults
 367   // Use CS_OWNDC to avoid messing about restoring the context
 368   // for every graphic operation.
 369 //  wndclass3.style         = CS_HREDRAW | CS_VREDRAW | CS_OWNDC | CS_DBLCLKS ;
 370   // wxWin 2.0
 371   wndclass3.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS ;
 372   wndclass3.lpfnWndProc   = (WNDPROC)wxWndProc;
 373   wndclass3.cbClsExtra    = 0;
 374   wndclass3.cbWndExtra    = sizeof( DWORD ); // was 4
 375   wndclass3.hInstance     = wxhInstance;
 376   wndclass3.hIcon         = NULL;
 377   wndclass3.hCursor       = NULL;
 378 //  wndclass3.hbrBackground = (HBRUSH)(COLOR_WINDOW+1) ;
 379   wndclass3.hbrBackground = NULL;
 380   wndclass3.lpszMenuName  = NULL;
 381   wndclass3.lpszClassName = wxCanvasClassName;
 382   if (!RegisterClass( &wndclass3))
 383   {
 384 //   wxFatalError("Can't register Canvas class");
 385 //   return FALSE;
 386   }
 387
 388   return TRUE;
 389 }
 390
 391 //// Convert Windows to argc, argv style
 392
 393 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 394 {
 395     wxStringList args;
 396
 397     wxString cmdLine(lpCmdLine);
 398     int count = 0;
 399
 400     // Get application name
 401     char name[260]; // 260 is MAX_PATH value from windef.h
 402     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 403
 404     // GNUWIN32 already fills in the first arg with the application name.
 405 #if !defined(__GNUWIN32__)
 406     args.Add(name);
 407     count ++;
 408 #endif
 409
 410     strcpy(name, wxFileNameFromPath(name));
 411     wxStripExtension(name);
 412     wxTheApp->SetAppName(name);
 413
 414     // Break up string
 415     // Treat strings enclosed in double-quotes as single arguments
 416     int i = 0;
 417     int len = cmdLine.Length();
 418     while (i < len)
 419     {
 420         // Skip whitespace
 421         while ((i < len) && isspace(cmdLine.GetChar(i)))
 422             i ++;
 423
 424         if (i < len)
 425         {
 426             if (cmdLine.GetChar(i) == '"') // We found the start of a string
 427             {
 428                 i ++;
 429                 int first = i;
 430                 while ((i < len) && (cmdLine.GetChar(i) != '"'))
 431                     i ++;
 432
 433                 wxString arg(cmdLine.Mid(first, (i - first)));
 434
 435                 args.Add(arg);
 436                 count ++;
 437
 438                 if (i < len)
 439                     i ++; // Skip past 2nd quote
 440             }
 441             else // Unquoted argument
 442             {
 443                 int first = i;
 444                 while ((i < len) && !isspace(cmdLine.GetChar(i)))
 445                     i ++;
 446
 447                 wxString arg(cmdLine.Mid(first, (i - first)));
 448
 449                 args.Add(arg);
 450                 count ++;
 451             }
 452         }
 453     }
 454
 455     wxTheApp->argv = new char*[count + 1];
 456     for (i = 0; i < count; i++)
 457     {
 458         wxString arg(args[i]);
 459         wxTheApp->argv[i] = copystring((const char*)arg);
 460     }
 461     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 462     wxTheApp->argc = count;
 463 }
 464
 465 //// Cleans up any wxWindows internal structures left lying around
 466
 467 void wxApp::CleanUp()
 468 {
 469   //// COMMON CLEANUP
 470   wxModule::CleanUpModules();
 471
 472 #if wxUSE_WX_RESOURCES
 473   wxCleanUpResourceSystem();
 474
 475 //  wxDefaultResourceTable->ClearTable();
 476 #endif
 477
 478   // Indicate that the cursor can be freed,
 479   // so that cursor won't be deleted by deleting
 480   // the bitmap list before g_globalCursor goes out
 481   // of scope (double deletion of the cursor).
 482   wxSetCursor(wxNullCursor);
 483   delete g_globalCursor;
 484
 485   wxDeleteStockObjects() ;
 486
 487   // Destroy all GDI lists, etc.
 488   wxDeleteStockLists();
 489
 490   delete wxTheColourDatabase;
 491   wxTheColourDatabase = NULL;
 492
 493   wxBitmap::CleanUpHandlers();
 494
 495   delete[] wxBuffer;
 496   wxBuffer = NULL;
 497
 498   //// WINDOWS-SPECIFIC CLEANUP
 499
 500   wxSetKeyboardHook(FALSE);
 501
 502 #ifdef __WIN95__
 503   if (gs_hRichEdit != NULL)
 504     FreeLibrary(gs_hRichEdit);
 505 #endif
 506
 507 #if wxUSE_PENWINDOWS
 508   wxCleanUpPenWin();
 509 #endif
 510
 511   if (wxSTD_FRAME_ICON)
 512     DestroyIcon(wxSTD_FRAME_ICON);
 513   if (wxSTD_MDICHILDFRAME_ICON)
 514     DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 515   if (wxSTD_MDIPARENTFRAME_ICON)
 516     DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 517
 518   if (wxDEFAULT_FRAME_ICON)
 519     DestroyIcon(wxDEFAULT_FRAME_ICON);
 520   if (wxDEFAULT_MDICHILDFRAME_ICON)
 521     DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 522   if (wxDEFAULT_MDIPARENTFRAME_ICON)
 523     DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 524
 525   if ( wxDisableButtonBrush )
 526     ::DeleteObject( wxDisableButtonBrush ) ;
 527
 528 #if !defined(__GNUWIN32__) && !defined(__SC__) && !defined(__SALFORDC__)
 529   ::OleUninitialize();
 530 #endif
 531
 532 #if CTL3D
 533   Ctl3dUnregister(wxhInstance);
 534 #endif
 535
 536   if (wxWinHandleList)
 537     delete wxWinHandleList ;
 538
 539   wxClassInfo::CleanUpClasses();
 540
 541   delete wxTheApp;
 542   wxTheApp = NULL;
 543
 544 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 545   // At this point we want to check if there are any memory
 546   // blocks that aren't part of the wxDebugContext itself,
 547   // as a special case. Then when dumping we need to ignore
 548   // wxDebugContext, too.
 549   if (wxDebugContext::CountObjectsLeft() > 0)
 550   {
 551       wxLogDebug("There were memory leaks.");
 552       wxDebugContext::Dump();
 553       wxDebugContext::PrintStatistics();
 554   }
 555 //  wxDebugContext::SetStream(NULL, NULL);
 556 #endif
 557
 558   // do it as the very last thing because everything else can log messages
 559   wxLog::DontCreateOnDemand();
 560   delete wxLog::SetActiveTarget(NULL);
 561 }
 562
 563 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 564
 565 // temporarily disable this warning
 566 #ifdef _MSC_VER
 567     #pragma warning(disable: 4715) // not all control paths return a value
 568 #endif // Visual C++
 569
 570 //// Main wxWindows entry point
 571 int wxEntry(WXHINSTANCE hInstance,
 572             WXHINSTANCE WXUNUSED(hPrevInstance),
 573             char *lpCmdLine,
 574             int nCmdShow,
 575             bool enterLoop)
 576 {
 577   // take everything into a try-except block in release build
 578   // FIXME other compilers must support Win32 SEH (structured exception
 579   //       handling) too, just find the appropriate keyword in their docs!
 580   //       Please note that it's _not_ the same as C++ exceptions!
 581 #if !defined(__WXDEBUG__) && defined(_MSC_VER)
 582     #define CATCH_PROGRAM_EXCEPTIONS
 583
 584   __try {
 585 #else
 586     #undef  CATCH_PROGRAM_EXCEPTIONS
 587 #endif
 588
 589   wxhInstance = (HINSTANCE) hInstance;
 590
 591   if (!wxApp::Initialize())
 592     return 0;
 593
 594   // create the application object or ensure that one already exists
 595   if (!wxTheApp)
 596   {
 597     // The app may have declared a global application object, but we recommend
 598     // the IMPLEMENT_APP macro is used instead, which sets an initializer
 599     // function for delayed, dynamic app object construction.
 600     wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 601                  "No initializer - use IMPLEMENT_APP macro." );
 602
 603     wxTheApp = (*wxApp::GetInitializerFunction()) ();
 604   }
 605
 606   wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 607
 608   // save the WinMain() parameters
 609   wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 610   wxTheApp->m_nCmdShow = nCmdShow;
 611
 612   // GUI-specific initialisation. In fact on Windows we don't have any,
 613   // but this call is provided for compatibility across platforms.
 614   wxTheApp->OnInitGui() ;
 615
 616   int retValue = 0;
 617
 618   if ( wxTheApp->OnInit() )
 619   {
 620       if ( enterLoop )
 621       {
 622           retValue = wxTheApp->OnRun();
 623       }
 624   }
 625   //else: app initialization failed, so we skipped OnRun()
 626
 627   wxWindow *topWindow = wxTheApp->GetTopWindow();
 628   if ( topWindow )
 629   {
 630       // Forcibly delete the window.
 631       if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 632            topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 633       {
 634           topWindow->Close(TRUE);
 635           wxTheApp->DeletePendingObjects();
 636       }
 637       else
 638       {
 639           delete topWindow;
 640           wxTheApp->SetTopWindow(NULL);
 641       }
 642   }
 643
 644   wxTheApp->OnExit();
 645
 646   // flush the logged messages if any
 647   wxLog *pLog = wxLog::GetActiveTarget();
 648   if ( pLog != NULL && pLog->HasPendingMessages() )
 649     pLog->Flush();
 650
 651
 652   wxApp::CleanUp();
 653
 654   return retValue;
 655
 656 #ifdef CATCH_PROGRAM_EXCEPTIONS
 657   }
 658   __except ( EXCEPTION_EXECUTE_HANDLER ) {
 659     /*
 660     if ( wxTheApp )
 661       wxTheApp->OnFatalException();
 662     */
 663
 664     ::ExitProcess(3); // the same exit code as abort()
 665
 666     // NOTREACHED
 667   }
 668 #endif // CATCH_PROGRAM_EXCEPTIONS
 669 }
 670
 671 // restore warning state
 672 #ifdef _MSC_VER
 673     #pragma warning(default: 4715) // not all control paths return a value
 674 #endif // Visual C++
 675
 676 #else /*  _WINDLL  */
 677
 678 //// Entry point for DLLs
 679
 680 int wxEntry(WXHINSTANCE hInstance)
 681 {
 682   wxhInstance = (HINSTANCE) hInstance;
 683   wxApp::Initialize();
 684
 685   // The app may have declared a global application object, but we recommend
 686   // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 687   // for delayed, dynamic app object construction.
 688
 689   if (!wxTheApp)
 690   {
 691     if (!wxApp::GetInitializerFunction())
 692     {
 693       MessageBox(NULL, "No initializer - use IMPLEMENT_APP macro.", "wxWindows Error", MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 694     return 0;
 695     }
 696
 697     wxTheApp = (* wxApp::GetInitializerFunction()) ();
 698   }
 699
 700   if (!wxTheApp) {
 701     MessageBox(NULL, "You have to define an instance of wxApp!", "wxWindows Error", MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 702     return 0;
 703   }
 704
 705   wxTheApp->argc = 0;
 706   wxTheApp->argv = NULL;
 707
 708   wxTheApp->OnInitGui();
 709
 710   wxTheApp->OnInit();
 711
 712   if (wxTheApp->GetTopWindow() && wxTheApp->GetTopWindow()->GetHWND()) {
 713     wxTheApp->GetTopWindow()->Show(TRUE);
 714   }
 715
 716   return 1;
 717 }
 718 #endif // _WINDLL
 719
 720 //// Static member initialization
 721
 722 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 723
 724 wxApp::wxApp()
 725 {
 726   m_topWindow = NULL;
 727   wxTheApp = this;
 728   m_className = "";
 729   m_wantDebugOutput = TRUE ;
 730   m_appName = "";
 731   argc = 0;
 732   argv = NULL;
 733 #ifdef __WXMSW__
 734   m_printMode = wxPRINT_WINDOWS;
 735 #else
 736   m_printMode = wxPRINT_POSTSCRIPT;
 737 #endif
 738   m_exitOnFrameDelete = TRUE;
 739   m_auto3D = TRUE;
 740 }
 741
 742 wxApp::~wxApp()
 743 {
 744   // Delete command-line args
 745   int i;
 746   for (i = 0; i < argc; i++)
 747   {
 748     delete[] argv[i];
 749   }
 750   delete[] argv;
 751 }
 752
 753 bool wxApp::Initialized()
 754 {
 755 #ifndef _WINDLL
 756   if (GetTopWindow())
 757     return TRUE;
 758   else
 759     return FALSE;
 760 #endif
 761 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 762   return TRUE;
 763 #endif
 764 }
 765
 766 /*
 767  * Get and process a message, returning FALSE if WM_QUIT
 768  * received (and also set the flag telling the app to exit the main loop)
 769  *
 770  */
 771 bool wxApp::DoMessage()
 772 {
 773     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 774     if ( rc == 0 )
 775     {
 776         // got WM_QUIT
 777         m_keepGoing = FALSE;
 778
 779         return FALSE;
 780     }
 781     else if ( rc == -1 )
 782     {
 783         // should never happen, but let's test for it nevertheless
 784         wxLogLastError("GetMessage");
 785     }
 786     else
 787     {
 788 #if wxUSE_THREADS
 789         wxASSERT_MSG( wxThread::IsMain(),
 790                       "only the main thread can process Windows messages" );
 791
 792         static bool s_hadGuiLock = TRUE;
 793         static wxMsgArray s_aSavedMessages;
 794
 795         // if a secondary thread owns is doing GUI calls, save all messages for
 796         // later processing - we can't process them right now because it will
 797         // lead to recursive library calls (and we're not reentrant)
 798         if ( !wxGuiOwnedByMainThread() )
 799         {
 800             s_hadGuiLock = FALSE;
 801
 802             // leave out WM_COMMAND messages: too dangerous, sometimes
 803             // the message will be processed twice
 804             if ( !wxIsWaitingForThread() ||
 805                  s_currentMsg.message != WM_COMMAND )
 806             {
 807                 s_aSavedMessages.Add(s_currentMsg);
 808             }
 809
 810             return TRUE;
 811         }
 812         else
 813         {
 814             // have we just regained the GUI lock? if so, post all of the saved
 815             // messages
 816             //
 817             // FIXME of course, it's not _exactly_ the same as processing the
 818             //       messages normally - expect some things to break...
 819             if ( !s_hadGuiLock )
 820             {
 821                 s_hadGuiLock = TRUE;
 822
 823                 size_t count = s_aSavedMessages.Count();
 824                 for ( size_t n = 0; n < count; n++ )
 825                 {
 826                     MSG& msg = s_aSavedMessages[n];
 827
 828                     if ( !ProcessMessage((WXMSG *)&msg) )
 829                     {
 830                         ::TranslateMessage(&msg);
 831                         ::DispatchMessage(&msg);
 832                     }
 833                 }
 834
 835                 s_aSavedMessages.Empty();
 836             }
 837         }
 838 #endif // wxUSE_THREADS
 839
 840         // Process the message
 841         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 842         {
 843             ::TranslateMessage(&s_currentMsg);
 844             wxApp::sm_lastMessageTime = s_currentMsg.time; /* MATTHEW: timeStamp impl. */
 845             ::DispatchMessage(&s_currentMsg);
 846         }
 847     }
 848
 849     return TRUE;
 850 }
 851
 852 /*
 853  * Keep trying to process messages until WM_QUIT
 854  * received.
 855  *
 856  * If there are messages to be processed, they will all be
 857  * processed and OnIdle will not be called.
 858  * When there are no more messages, OnIdle is called.
 859  * If OnIdle requests more time,
 860  * it will be repeatedly called so long as there are no pending messages.
 861  * A 'feature' of this is that once OnIdle has decided that no more processing
 862  * is required, then it won't get processing time until further messages
 863  * are processed (it'll sit in DoMessage).
 864  */
 865
 866 int wxApp::MainLoop()
 867 {
 868   m_keepGoing = TRUE;
 869
 870   while ( m_keepGoing )
 871   {
 872     #if wxUSE_THREADS
 873         wxMutexGuiLeaveOrEnter();
 874     #endif // wxUSE_THREADS
 875
 876     while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 877             ProcessIdle() )
 878     {
 879     }
 880
 881     DoMessage();
 882   }
 883
 884   return s_currentMsg.wParam;
 885 }
 886
 887 // Returns TRUE if more time is needed.
 888 bool wxApp::ProcessIdle()
 889 {
 890     wxIdleEvent event;
 891     event.SetEventObject(this);
 892     ProcessEvent(event);
 893
 894     return event.MoreRequested();
 895 }
 896
 897 void wxApp::ExitMainLoop()
 898 {
 899   m_keepGoing = FALSE;
 900 }
 901
 902 bool wxApp::Pending()
 903 {
 904   return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0) ;
 905 }
 906
 907 void wxApp::Dispatch()
 908 {
 909     DoMessage();
 910 }
 911
 912 /*
 913  * Give all windows a chance to preprocess
 914  * the message. Some may have accelerator tables, or have
 915  * MDI complications.
 916  */
 917 bool wxApp::ProcessMessage(WXMSG *Msg)
 918 {
 919   MSG *msg = (MSG *)Msg;
 920
 921   HWND hWnd;
 922
 923   // Try translations first; find the youngest window with
 924   // a translation table.
 925   for (hWnd = msg->hwnd; hWnd != NULL; hWnd = ::GetParent(hWnd))
 926   {
 927     wxWindow *wnd = wxFindWinFromHandle((WXHWND) hWnd);
 928     if (wnd)
 929     {
 930        if (wnd->MSWTranslateMessage(Msg))
 931          return TRUE;
 932     }
 933   }
 934
 935   // Anyone for a non-translation message? Try youngest descendants first.
 936   for (hWnd = msg->hwnd; hWnd != NULL; hWnd = ::GetParent(hWnd))
 937   {
 938     wxWindow *wnd = wxFindWinFromHandle((WXHWND) hWnd);
 939     if (wnd)
 940     {
 941        if (wnd->MSWProcessMessage(Msg))
 942          return TRUE;
 943     }
 944   }
 945   return FALSE;
 946 }
 947
 948 void wxApp::OnIdle(wxIdleEvent& event)
 949 {
 950     static bool s_inOnIdle = FALSE;
 951
 952     // Avoid recursion (via ProcessEvent default case)
 953     if ( s_inOnIdle )
 954         return;
 955
 956     s_inOnIdle = TRUE;
 957
 958     // 'Garbage' collection of windows deleted with Close().
 959     DeletePendingObjects();
 960
 961     // flush the logged messages if any
 962     wxLog *pLog = wxLog::GetActiveTarget();
 963     if ( pLog != NULL && pLog->HasPendingMessages() )
 964         pLog->Flush();
 965
 966     // Send OnIdle events to all windows
 967     if ( SendIdleEvents() )
 968     {
 969         // SendIdleEvents() returns TRUE if at least one window requested more
 970         // idle events
 971         event.RequestMore(TRUE);
 972     }
 973
 974     s_inOnIdle = FALSE;
 975 }
 976
 977 // Send idle event to all top-level windows
 978 bool wxApp::SendIdleEvents()
 979 {
 980     bool needMore = FALSE;
 981     wxNode* node = wxTopLevelWindows.First();
 982     while (node)
 983     {
 984         wxWindow* win = (wxWindow*) node->Data();
 985         if (SendIdleEvents(win))
 986             needMore = TRUE;
 987
 988         node = node->Next();
 989     }
 990
 991     return needMore;
 992 }
 993
 994 // Send idle event to window and all subwindows
 995 bool wxApp::SendIdleEvents(wxWindow* win)
 996 {
 997   bool needMore = FALSE;
 998
 999   wxIdleEvent event;
1000   event.SetEventObject(win);
1001   win->GetEventHandler()->ProcessEvent(event);
1002
1003   if (event.MoreRequested())
1004     needMore = TRUE;
1005
1006   wxNode* node = win->GetChildren().First();
1007   while (node)
1008   {
1009     wxWindow* win = (wxWindow*) node->Data();
1010     if (SendIdleEvents(win))
1011       needMore = TRUE;
1012
1013     node = node->Next();
1014   }
1015   return needMore ;
1016 }
1017
1018 void wxApp::DeletePendingObjects()
1019 {
1020   wxNode *node = wxPendingDelete.First();
1021   while (node)
1022   {
1023     wxObject *obj = (wxObject *)node->Data();
1024
1025     delete obj;
1026
1027     if (wxPendingDelete.Member(obj))
1028       delete node;
1029
1030     // Deleting one object may have deleted other pending
1031     // objects, so start from beginning of list again.
1032     node = wxPendingDelete.First();
1033   }
1034 }
1035
1036 void wxApp::OnEndSession(wxCloseEvent& event)
1037 {
1038     if (GetTopWindow())
1039         GetTopWindow()->Close(TRUE);
1040 }
1041
1042 // Default behaviour: close the application with prompts. The
1043 // user can veto the close, and therefore the end session.
1044 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1045 {
1046     if (GetTopWindow())
1047     {
1048         if (!GetTopWindow()->Close(!event.CanVeto()))
1049             event.Veto(TRUE);
1050     }
1051 }
1052
1053 wxLog* wxApp::CreateLogTarget()
1054 {
1055     return new wxLogGui;
1056 }
1057
1058 wxWindow* wxApp::GetTopWindow() const
1059 {
1060     if (m_topWindow)
1061         return m_topWindow;
1062     else if (wxTopLevelWindows.Number() > 0)
1063         return (wxWindow*) wxTopLevelWindows.First()->Data();
1064     else
1065         return NULL;
1066 }
1067
1068 int wxApp::GetComCtl32Version() const
1069 {
1070     // have we loaded COMCTL32 yet?
1071     HMODULE theModule = ::GetModuleHandle("COMCTL32");
1072     int version = 0;
1073
1074     // if so, then we can check for the version
1075     if (theModule)
1076     {
1077         // InitCommonControlsEx is unique to 4.7 and later
1078         FARPROC theProc = ::GetProcAddress(theModule, "InitCommonControlsEx");
1079
1080         if (! theProc)
1081         {                    // not found, must be 4.00
1082       version = 400;
1083         }
1084         else
1085         {
1086       // The following symbol are unique to 4.71
1087       //   DllInstall
1088       //   FlatSB_EnableScrollBar FlatSB_GetScrollInfo FlatSB_GetScrollPos
1089       //   FlatSB_GetScrollProp FlatSB_GetScrollRange FlatSB_SetScrollInfo
1090       //   FlatSB_SetScrollPos FlatSB_SetScrollProp FlatSB_SetScrollRange
1091       //   FlatSB_ShowScrollBar
1092       //   _DrawIndirectImageList _DuplicateImageList
1093       //   InitializeFlatSB
1094       //   UninitializeFlatSB
1095       // we could check for any of these - I chose DllInstall
1096       FARPROC theProc = ::GetProcAddress(theModule, "DllInstall");
1097       if (! theProc)
1098       {
1099         // not found, must be 4.70
1100         version = 470;
1101       }
1102       else
1103       {                         // found, must be 4.71
1104         version = 471;
1105       }
1106         }
1107     }
1108     return version;
1109 }
1110
1111 void wxExit()
1112 {
1113   wxApp::CleanUp();
1114   FatalAppExit(0, "Fatal error: exiting");
1115 }
1116
1117 // Yield to incoming messages
1118 bool wxYield()
1119 {
1120   MSG msg;
1121   // We want to go back to the main message loop
1122   // if we see a WM_QUIT. (?)
1123   while (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) && msg.message != WM_QUIT)
1124   {
1125     if ( !wxTheApp->DoMessage() )
1126       break;
1127   }
1128
1129   return TRUE;
1130 }
1131
1132 HINSTANCE wxGetInstance()
1133 {
1134   return wxhInstance;
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(_MSC_VER) && !defined(__WIN32__)) || defined(__GNUWIN32__)
1140   #include "main.cpp"
1141 #endif