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 #endif
  48
  49 #include "wx/log.h"
  50 #include "wx/module.h"
  51
  52 #include "wx/msw/private.h"
  53
  54 #if wxUSE_THREADS
  55     #include "wx/thread.h"
  56
  57     // define the array of MSG strutures
  58     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
  59
  60     #include "wx/arrimpl.cpp"
  61
  62     WX_DEFINE_OBJARRAY(wxMsgArray);
  63 #endif // wxUSE_THREADS
  64
  65 #if wxUSE_WX_RESOURCES
  66     #include "wx/resource.h"
  67 #endif
  68
  69 // OLE is used for drag-and-drop, clipboard, OLE Automation...
  70 #if defined(__GNUWIN32__) || defined(__SC__) || defined(__SALFORDC__)
  71     #undef wxUSE_OLE
  72
  73     #define  wxUSE_OLE 0
  74 #endif // broken compilers
  75
  76 #if wxUSE_OLE
  77     #include <ole2.h>
  78 #endif
  79
  80 #include <string.h>
  81 #include <ctype.h>
  82
  83 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__)
  84     #include <commctrl.h>
  85 #endif
  86
  87 #include "wx/msw/msvcrt.h"
  88
  89
  90 // ---------------------------------------------------------------------------
  91 // global variables
  92 // ---------------------------------------------------------------------------
  93
  94 extern char *wxBuffer;
  95 extern char *wxOsVersion;
  96 extern wxList *wxWinHandleList;
  97 extern wxList WXDLLEXPORT wxPendingDelete;
  98 #if wxUSE_THREADS
  99 extern wxList *wxPendingEvents;
 100 extern wxCriticalSection *wxPendingEventsLocker;
 101 #endif
 102 extern void wxSetKeyboardHook(bool doIt);
 103 extern wxCursor *g_globalCursor;
 104
 105 HINSTANCE wxhInstance = 0;
 106 MSG s_currentMsg;
 107 wxApp *wxTheApp = NULL;
 108
 109 // FIXME why not const? and not static?
 110 char wxFrameClassName[]         = "wxFrameClass";
 111 char wxMDIFrameClassName[]      = "wxMDIFrameClass";
 112 char wxMDIChildFrameClassName[] = "wxMDIChildFrameClass";
 113 char wxPanelClassName[]         = "wxPanelClass";
 114 char wxCanvasClassName[]        = "wxCanvasClass";
 115
 116 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 117 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 118 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 119
 120 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 121 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 122 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 123
 124 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 125
 126 LRESULT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 127
 128 #if defined(__WIN95__) && !defined(__TWIN32__)
 129     #define wxUSE_RICHEDIT 1
 130 #else
 131     #define wxUSE_RICHEDIT 0
 132 #endif
 133
 134 #if wxUSE_RICHEDIT
 135     static HINSTANCE gs_hRichEdit = (HINSTANCE) NULL;
 136 #endif
 137
 138 // ===========================================================================
 139 // implementation
 140 // ===========================================================================
 141
 142 // ---------------------------------------------------------------------------
 143 // wxApp
 144 // ---------------------------------------------------------------------------
 145
 146 #if !USE_SHARED_LIBRARY
 147     IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 148
 149     BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 150         EVT_IDLE(wxApp::OnIdle)
 151         EVT_END_SESSION(wxApp::OnEndSession)
 152         EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 153     END_EVENT_TABLE()
 154 #endif
 155
 156 //// Initialize
 157 bool wxApp::Initialize()
 158 {
 159     // Some people may wish to use this, but
 160     // probably it shouldn't be here by default.
 161 #ifdef __WXDEBUG__
 162     //    wxRedirectIOToConsole();
 163 #endif
 164
 165     wxBuffer = new char[1500]; // FIXME
 166
 167     wxClassInfo::InitializeClasses();
 168
 169 #if wxUSE_RESOURCES
 170     wxGetResource("wxWindows", "OsVersion", &wxOsVersion);
 171 #endif
 172
 173     // I'm annoyed ... I don't know where to put this and I don't want to
 174     // create a module for that as it's part of the core.
 175 #if wxUSE_THREADS
 176     wxPendingEvents = new wxList();
 177     wxPendingEventsLocker = new wxCriticalSection();
 178 #endif
 179
 180     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 181     wxTheColourDatabase->Initialize();
 182
 183     wxInitializeStockLists();
 184     wxInitializeStockObjects();
 185
 186 #if wxUSE_WX_RESOURCES
 187     wxInitializeResourceSystem();
 188 #endif
 189
 190     wxBitmap::InitStandardHandlers();
 191
 192 #if defined(__WIN95__)
 193     InitCommonControls();
 194
 195 #if wxUSE_RICHEDIT
 196     gs_hRichEdit = LoadLibrary("RICHED32.DLL");
 197
 198     if (gs_hRichEdit == (HINSTANCE) NULL)
 199     {
 200         wxLogError(_("Could not initialise Rich Edit DLL"));
 201     }
 202 #endif // wxUSE_RICHEDIT
 203
 204 #endif // __WIN95__
 205
 206     // for OLE, enlarge message queue to be as large as possible
 207     int iMsg = 96;
 208     while (!SetMessageQueue(iMsg) && (iMsg -= 8));
 209
 210 #if wxUSE_OLE
 211     // we need to initialize OLE library
 212     if ( FAILED(::OleInitialize(NULL)) )
 213         wxLogError(_("Cannot initialize OLE"));
 214 #endif
 215
 216 #if wxUSE_CTL3D
 217     if (!Ctl3dRegister(wxhInstance))
 218         wxLogError("Cannot register CTL3D");
 219
 220     Ctl3dAutoSubclass(wxhInstance);
 221 #endif
 222
 223     g_globalCursor = new wxCursor;
 224
 225     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, "wxSTD_FRAME");
 226     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, "wxSTD_MDIPARENTFRAME");
 227     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, "wxSTD_MDICHILDFRAME");
 228
 229     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_FRAME");
 230     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_MDIPARENTFRAME");
 231     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_MDICHILDFRAME");
 232
 233     RegisterWindowClasses();
 234
 235     // Create the brush for disabling bitmap buttons
 236
 237     LOGBRUSH lb;
 238     lb.lbStyle = BS_PATTERN;
 239     lb.lbHatch = (int)LoadBitmap( wxhInstance, "wxDISABLE_BUTTON_BITMAP" );
 240     if ( lb.lbHatch )
 241     {
 242         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 243         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 244     }
 245     //else: wxWindows resources are probably not linked in
 246
 247 #if wxUSE_PENWINDOWS
 248     wxRegisterPenWin();
 249 #endif
 250
 251     wxWinHandleList = new wxList(wxKEY_INTEGER);
 252
 253     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 254     // PLEASE DO NOT ALTER THIS.
 255 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 256     extern char wxDummyChar;
 257     if (wxDummyChar) wxDummyChar++;
 258 #endif
 259
 260     wxSetKeyboardHook(TRUE);
 261
 262     wxModule::RegisterModules();
 263     if (!wxModule::InitializeModules())
 264         return FALSE;
 265     return TRUE;
 266 }
 267
 268 // ---------------------------------------------------------------------------
 269 // RegisterWindowClasses
 270 // ---------------------------------------------------------------------------
 271
 272 bool wxApp::RegisterWindowClasses()
 273 {
 274     WNDCLASS wndclass;
 275
 276     // the fields which are common to all classes
 277     wndclass.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 278     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 279     wndclass.cbClsExtra    = 0;
 280     wndclass.cbWndExtra    = sizeof( DWORD ); // 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 #ifdef _MULTIPLE_INSTANCES
 289     sprintf( wxFrameClassName,"wxFrameClass%d", wxhInstance );
 290 #endif
 291     wndclass.lpszClassName = wxFrameClassName;
 292
 293     if ( !RegisterClass(&wndclass) )
 294     {
 295         wxLogLastError("RegisterClass(frame)");
 296
 297         return FALSE;
 298     }
 299
 300     // Register the MDI frame window class.
 301     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 302     wndclass.lpszClassName = wxMDIFrameClassName;
 303
 304     if ( !RegisterClass(&wndclass) )
 305     {
 306         wxLogLastError("RegisterClass(MDI parent)");
 307
 308         return FALSE;
 309     }
 310
 311     // Register the MDI child frame window class.
 312     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 313     wndclass.lpszClassName = wxMDIChildFrameClassName;
 314
 315     if ( !RegisterClass(&wndclass) )
 316     {
 317         wxLogLastError("RegisterClass(MDI child)");
 318
 319         return FALSE;
 320     }
 321
 322     // Register the panel window class.
 323     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 324     wndclass.lpszClassName = wxPanelClassName;
 325
 326     if ( !RegisterClass(&wndclass) )
 327     {
 328         wxLogLastError("RegisterClass(panel)");
 329
 330         return FALSE;
 331     }
 332
 333     // Register the canvas and textsubwindow class name
 334     wndclass.hbrBackground = (HBRUSH)NULL;
 335     wndclass.lpszClassName = wxCanvasClassName;
 336
 337     if ( !RegisterClass(&wndclass) )
 338     {
 339         wxLogLastError("RegisterClass(canvas)");
 340
 341         return FALSE;
 342     }
 343
 344     return TRUE;
 345 }
 346
 347 // ---------------------------------------------------------------------------
 348 // Convert Windows to argc, argv style
 349 // ---------------------------------------------------------------------------
 350
 351 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 352 {
 353     wxStringList args;
 354
 355     wxString cmdLine(lpCmdLine);
 356     int count = 0;
 357
 358     // Get application name
 359     char name[260]; // 260 is MAX_PATH value from windef.h
 360     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 361
 362     args.Add(name);
 363     count++;
 364
 365     strcpy(name, wxFileNameFromPath(name));
 366     wxStripExtension(name);
 367     wxTheApp->SetAppName(name);
 368
 369     // Break up string
 370     // Treat strings enclosed in double-quotes as single arguments
 371     int i = 0;
 372     int len = cmdLine.Length();
 373     while (i < len)
 374     {
 375         // Skip whitespace
 376         while ((i < len) && isspace(cmdLine.GetChar(i)))
 377             i ++;
 378
 379         if (i < len)
 380         {
 381             if (cmdLine.GetChar(i) == '"') // We found the start of a string
 382             {
 383                 i ++;
 384                 int first = i;
 385                 while ((i < len) && (cmdLine.GetChar(i) != '"'))
 386                     i ++;
 387
 388                 wxString arg(cmdLine.Mid(first, (i - first)));
 389
 390                 args.Add(arg);
 391                 count ++;
 392
 393                 if (i < len)
 394                     i ++; // Skip past 2nd quote
 395             }
 396             else // Unquoted argument
 397             {
 398                 int first = i;
 399                 while ((i < len) && !isspace(cmdLine.GetChar(i)))
 400                     i ++;
 401
 402                 wxString arg(cmdLine.Mid(first, (i - first)));
 403
 404                 args.Add(arg);
 405                 count ++;
 406             }
 407         }
 408     }
 409
 410     wxTheApp->argv = new char*[count + 1];
 411     for (i = 0; i < count; i++)
 412     {
 413         wxString arg(args[i]);
 414         wxTheApp->argv[i] = copystring((const char*)arg);
 415     }
 416     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 417     wxTheApp->argc = count;
 418 }
 419
 420 //// Cleans up any wxWindows internal structures left lying around
 421
 422 void wxApp::CleanUp()
 423 {
 424     //// COMMON CLEANUP
 425
 426 #if wxUSE_LOG
 427     // flush the logged messages if any and install a 'safer' log target: the
 428     // default one (wxLogGui) can't be used after the resources are freed just
 429     // below and the user suppliedo ne might be even more unsafe (using any
 430     // wxWindows GUI function is unsafe starting from now)
 431     wxLog::DontCreateOnDemand();
 432
 433     // this will flush the old messages if any
 434     delete wxLog::SetActiveTarget(new wxLogStderr);
 435 #endif // wxUSE_LOG
 436
 437     // One last chance for pending objects to be cleaned up
 438     wxTheApp->DeletePendingObjects();
 439
 440     wxModule::CleanUpModules();
 441
 442 #if wxUSE_WX_RESOURCES
 443     wxCleanUpResourceSystem();
 444
 445     //  wxDefaultResourceTable->ClearTable();
 446 #endif
 447
 448     // Indicate that the cursor can be freed, so that cursor won't be deleted
 449     // by deleting the bitmap list before g_globalCursor goes out of scope
 450     // (double deletion of the cursor).
 451     wxSetCursor(wxNullCursor);
 452     delete g_globalCursor;
 453     g_globalCursor = NULL;
 454
 455     wxDeleteStockObjects();
 456
 457     // Destroy all GDI lists, etc.
 458     wxDeleteStockLists();
 459
 460     delete wxTheColourDatabase;
 461     wxTheColourDatabase = NULL;
 462
 463     wxBitmap::CleanUpHandlers();
 464
 465     delete[] wxBuffer;
 466     wxBuffer = NULL;
 467
 468     //// WINDOWS-SPECIFIC CLEANUP
 469
 470     wxSetKeyboardHook(FALSE);
 471
 472 #ifdef __WIN95__
 473
 474 #if wxUSE_RICHEDIT
 475     if (gs_hRichEdit != (HINSTANCE) NULL)
 476         FreeLibrary(gs_hRichEdit);
 477 #endif
 478
 479 #endif
 480
 481 #if wxUSE_PENWINDOWS
 482     wxCleanUpPenWin();
 483 #endif
 484
 485     if (wxSTD_FRAME_ICON)
 486         DestroyIcon(wxSTD_FRAME_ICON);
 487     if (wxSTD_MDICHILDFRAME_ICON)
 488         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 489     if (wxSTD_MDIPARENTFRAME_ICON)
 490         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 491
 492     if (wxDEFAULT_FRAME_ICON)
 493         DestroyIcon(wxDEFAULT_FRAME_ICON);
 494     if (wxDEFAULT_MDICHILDFRAME_ICON)
 495         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 496     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 497         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 498
 499     if ( wxDisableButtonBrush )
 500         ::DeleteObject( wxDisableButtonBrush );
 501
 502 #if wxUSE_OLE
 503     ::OleUninitialize();
 504 #endif
 505
 506 #if wxUSE_CTL3D
 507     Ctl3dUnregister(wxhInstance);
 508 #endif
 509
 510     if (wxWinHandleList)
 511         delete wxWinHandleList;
 512
 513     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 514     // create a module for that as it's part of the core.
 515 #if wxUSE_THREADS
 516     delete wxPendingEvents;
 517     delete wxPendingEventsLocker;
 518     // If we don't do the following, we get an apparent memory leak.
 519     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 520 #endif
 521
 522     wxClassInfo::CleanUpClasses();
 523
 524     delete wxTheApp;
 525     wxTheApp = NULL;
 526
 527 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 528     // At this point we want to check if there are any memory
 529     // blocks that aren't part of the wxDebugContext itself,
 530     // as a special case. Then when dumping we need to ignore
 531     // wxDebugContext, too.
 532     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 533     {
 534         wxLogDebug("There were memory leaks.");
 535         wxDebugContext::Dump();
 536         wxDebugContext::PrintStatistics();
 537     }
 538     //  wxDebugContext::SetStream(NULL, NULL);
 539 #endif
 540
 541 #if wxUSE_LOG
 542     // do it as the very last thing because everything else can log messages
 543     delete wxLog::SetActiveTarget(NULL);
 544 #endif // wxUSE_LOG
 545 }
 546
 547 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 548
 549 // temporarily disable this warning which would be generated in release builds
 550 // because of __try
 551 #ifdef __VISUALC__
 552     #pragma warning(disable: 4715) // not all control paths return a value
 553 #endif // Visual C++
 554
 555 //// Main wxWindows entry point
 556 int wxEntry(WXHINSTANCE hInstance,
 557             WXHINSTANCE WXUNUSED(hPrevInstance),
 558             char *lpCmdLine,
 559             int nCmdShow,
 560             bool enterLoop)
 561 {
 562     // do check for memory leaks on program exit
 563     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 564     //  deallocated memory which may be used to simulate low-memory condition)
 565     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 566
 567     // take everything into a try-except block in release build
 568     // FIXME other compilers must support Win32 SEH (structured exception
 569     //       handling) too, just find the appropriate keyword in their docs!
 570     //       Please note that it's _not_ the same as C++ exceptions!
 571 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 572     #define CATCH_PROGRAM_EXCEPTIONS
 573
 574     __try {
 575 #else
 576     #undef  CATCH_PROGRAM_EXCEPTIONS
 577 #endif
 578
 579         wxhInstance = (HINSTANCE) hInstance;
 580
 581         if (!wxApp::Initialize())
 582             return 0;
 583
 584         // create the application object or ensure that one already exists
 585         if (!wxTheApp)
 586         {
 587             // The app may have declared a global application object, but we recommend
 588             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 589             // function for delayed, dynamic app object construction.
 590             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 591                          "No initializer - use IMPLEMENT_APP macro." );
 592
 593             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 594         }
 595
 596         wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 597
 598         // save the WinMain() parameters
 599         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 600         wxTheApp->m_nCmdShow = nCmdShow;
 601
 602         // GUI-specific initialisation. In fact on Windows we don't have any,
 603         // but this call is provided for compatibility across platforms.
 604         wxTheApp->OnInitGui();
 605
 606         int retValue = 0;
 607
 608         if ( wxTheApp->OnInit() )
 609         {
 610             if ( enterLoop )
 611             {
 612                 retValue = wxTheApp->OnRun();
 613             }
 614             else
 615                 // We want to initialize, but not run or exit immediately.
 616                 return 1;
 617         }
 618         //else: app initialization failed, so we skipped OnRun()
 619
 620         wxWindow *topWindow = wxTheApp->GetTopWindow();
 621         if ( topWindow )
 622         {
 623             // Forcibly delete the window.
 624             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 625                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 626             {
 627                 topWindow->Close(TRUE);
 628                 wxTheApp->DeletePendingObjects();
 629             }
 630             else
 631             {
 632                 delete topWindow;
 633                 wxTheApp->SetTopWindow(NULL);
 634             }
 635         }
 636
 637         wxTheApp->OnExit();
 638
 639         wxApp::CleanUp();
 640
 641         return retValue;
 642
 643 #ifdef CATCH_PROGRAM_EXCEPTIONS
 644     }
 645     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 646         /*
 647            if ( wxTheApp )
 648            wxTheApp->OnFatalException();
 649          */
 650
 651         // using wxLog would be unsafe here
 652         ::MessageBox(NULL,
 653                      _("Unrecoverable program error detected: "
 654                      " the application will terminate."),
 655                      _("Fatal Error"),
 656                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 657
 658         ::ExitProcess(3); // the same exit code as abort()
 659
 660         // NOTREACHED
 661     }
 662 #endif // CATCH_PROGRAM_EXCEPTIONS
 663 }
 664
 665 // restore warning state
 666 #ifdef __VISUALC__
 667     #pragma warning(default: 4715) // not all control paths return a value
 668 #endif // Visual C++
 669
 670 #else /*  _WINDLL  */
 671
 672 //// Entry point for DLLs
 673
 674 int wxEntry(WXHINSTANCE hInstance)
 675 {
 676     wxhInstance = (HINSTANCE) hInstance;
 677     wxApp::Initialize();
 678
 679     // The app may have declared a global application object, but we recommend
 680     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 681     // for delayed, dynamic app object construction.
 682     if (!wxTheApp)
 683     {
 684         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 685                      "No initializer - use IMPLEMENT_APP macro." );
 686
 687         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 688     }
 689
 690     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 691
 692     wxTheApp->argc = 0;
 693     wxTheApp->argv = NULL;
 694
 695     wxTheApp->OnInitGui();
 696
 697     wxTheApp->OnInit();
 698
 699     wxWindow *topWindow = wxTheApp->GetTopWindow();
 700     if ( topWindow && topWindow->GetHWND())
 701     {
 702         topWindow->Show(TRUE);
 703     }
 704
 705     return 1;
 706 }
 707 #endif // _WINDLL
 708
 709 //// Static member initialization
 710
 711 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 712
 713 wxApp::wxApp()
 714 {
 715     m_topWindow = NULL;
 716     wxTheApp = this;
 717     m_wantDebugOutput = TRUE;
 718
 719     argc = 0;
 720     argv = NULL;
 721     m_printMode = wxPRINT_WINDOWS;
 722     m_exitOnFrameDelete = TRUE;
 723     m_auto3D = TRUE;
 724 }
 725
 726 wxApp::~wxApp()
 727 {
 728     // Delete command-line args
 729     int i;
 730     for (i = 0; i < argc; i++)
 731     {
 732         delete[] argv[i];
 733     }
 734     delete[] argv;
 735 }
 736
 737 bool wxApp::Initialized()
 738 {
 739 #ifndef _WINDLL
 740     if (GetTopWindow())
 741         return TRUE;
 742     else
 743         return FALSE;
 744 #endif
 745 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 746     return TRUE;
 747 #endif
 748 }
 749
 750 /*
 751  * Get and process a message, returning FALSE if WM_QUIT
 752  * received (and also set the flag telling the app to exit the main loop)
 753  *
 754  */
 755 bool wxApp::DoMessage()
 756 {
 757     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 758     if ( rc == 0 )
 759     {
 760         // got WM_QUIT
 761         m_keepGoing = FALSE;
 762
 763         return FALSE;
 764     }
 765     else if ( rc == -1 )
 766     {
 767         // should never happen, but let's test for it nevertheless
 768         wxLogLastError("GetMessage");
 769     }
 770     else
 771     {
 772 #if wxUSE_THREADS
 773         wxASSERT_MSG( wxThread::IsMain(),
 774                       "only the main thread can process Windows messages" );
 775
 776         static bool s_hadGuiLock = TRUE;
 777         static wxMsgArray s_aSavedMessages;
 778
 779         // if a secondary thread owns is doing GUI calls, save all messages for
 780         // later processing - we can't process them right now because it will
 781         // lead to recursive library calls (and we're not reentrant)
 782         if ( !wxGuiOwnedByMainThread() )
 783         {
 784             s_hadGuiLock = FALSE;
 785
 786             // leave out WM_COMMAND messages: too dangerous, sometimes
 787             // the message will be processed twice
 788             if ( !wxIsWaitingForThread() ||
 789                     s_currentMsg.message != WM_COMMAND )
 790             {
 791                 s_aSavedMessages.Add(s_currentMsg);
 792             }
 793
 794             return TRUE;
 795         }
 796         else
 797         {
 798             // have we just regained the GUI lock? if so, post all of the saved
 799             // messages
 800             //
 801             // FIXME of course, it's not _exactly_ the same as processing the
 802             //       messages normally - expect some things to break...
 803             if ( !s_hadGuiLock )
 804             {
 805                 s_hadGuiLock = TRUE;
 806
 807                 size_t count = s_aSavedMessages.Count();
 808                 for ( size_t n = 0; n < count; n++ )
 809                 {
 810                     MSG& msg = s_aSavedMessages[n];
 811
 812                     if ( !ProcessMessage((WXMSG *)&msg) )
 813                     {
 814                         ::TranslateMessage(&msg);
 815                         ::DispatchMessage(&msg);
 816                     }
 817                 }
 818
 819                 s_aSavedMessages.Empty();
 820             }
 821         }
 822 #endif // wxUSE_THREADS
 823
 824         // Process the message
 825         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 826         {
 827             ::TranslateMessage(&s_currentMsg);
 828             ::DispatchMessage(&s_currentMsg);
 829         }
 830     }
 831
 832     return TRUE;
 833 }
 834
 835 /*
 836  * Keep trying to process messages until WM_QUIT
 837  * received.
 838  *
 839  * If there are messages to be processed, they will all be
 840  * processed and OnIdle will not be called.
 841  * When there are no more messages, OnIdle is called.
 842  * If OnIdle requests more time,
 843  * it will be repeatedly called so long as there are no pending messages.
 844  * A 'feature' of this is that once OnIdle has decided that no more processing
 845  * is required, then it won't get processing time until further messages
 846  * are processed (it'll sit in DoMessage).
 847  */
 848
 849 int wxApp::MainLoop()
 850 {
 851     m_keepGoing = TRUE;
 852
 853     while ( m_keepGoing )
 854     {
 855 #if wxUSE_THREADS
 856         wxMutexGuiLeaveOrEnter();
 857 #endif // wxUSE_THREADS
 858
 859         while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 860                 ProcessIdle() )
 861         {
 862         }
 863
 864
 865         DoMessage();
 866     }
 867
 868     return s_currentMsg.wParam;
 869 }
 870
 871 // Returns TRUE if more time is needed.
 872 bool wxApp::ProcessIdle()
 873 {
 874     wxIdleEvent event;
 875     event.SetEventObject(this);
 876     ProcessEvent(event);
 877
 878     return event.MoreRequested();
 879 }
 880
 881 #if wxUSE_THREADS
 882 void wxApp::ProcessPendingEvents()
 883 {
 884     wxNode *node = wxPendingEvents->First();
 885     wxCriticalSectionLocker locker(*wxPendingEventsLocker);
 886
 887     while (node)
 888     {
 889         wxEvtHandler *handler = (wxEvtHandler *)node->Data();
 890
 891         handler->ProcessPendingEvents();
 892
 893         delete node;
 894         node = wxPendingEvents->First();
 895     }
 896 }
 897 #endif
 898
 899
 900 void wxApp::ExitMainLoop()
 901 {
 902     m_keepGoing = FALSE;
 903 }
 904
 905 bool wxApp::Pending()
 906 {
 907     return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0);
 908 }
 909
 910 void wxApp::Dispatch()
 911 {
 912     DoMessage();
 913 }
 914
 915 /*
 916  * Give all windows a chance to preprocess
 917  * the message. Some may have accelerator tables, or have
 918  * MDI complications.
 919  */
 920
 921 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 922 {
 923     MSG *msg = (MSG *)wxmsg;
 924     HWND hWnd = msg->hwnd;
 925     wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
 926
 927     // Try translations first; find the youngest window with
 928     // a translation table.
 929     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 930     {
 931         if ( wnd->MSWTranslateMessage(wxmsg) )
 932             return TRUE;
 933     }
 934
 935     // Anyone for a non-translation message? Try youngest descendants first.
 936     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 937     {
 938         if ( wnd->MSWProcessMessage(wxmsg) )
 939             return TRUE;
 940     }
 941
 942     return FALSE;
 943 }
 944
 945 void wxApp::OnIdle(wxIdleEvent& event)
 946 {
 947     static bool s_inOnIdle = FALSE;
 948
 949     // Avoid recursion (via ProcessEvent default case)
 950     if ( s_inOnIdle )
 951         return;
 952
 953     s_inOnIdle = TRUE;
 954
 955     // 'Garbage' collection of windows deleted with Close().
 956     DeletePendingObjects();
 957
 958 #if wxUSE_LOG
 959     // flush the logged messages if any
 960     wxLog *pLog = wxLog::GetActiveTarget();
 961     if ( pLog != NULL && pLog->HasPendingMessages() )
 962         pLog->Flush();
 963 #endif // wxUSE_LOG
 964
 965     // Send OnIdle events to all windows
 966     if ( SendIdleEvents() )
 967     {
 968         // SendIdleEvents() returns TRUE if at least one window requested more
 969         // idle events
 970         event.RequestMore(TRUE);
 971     }
 972
 973     // If they are pending events, we must process them.
 974 #if wxUSE_THREADS
 975     ProcessPendingEvents();
 976 #endif
 977     s_inOnIdle = FALSE;
 978 }
 979
 980 // Send idle event to all top-level windows
 981 bool wxApp::SendIdleEvents()
 982 {
 983     bool needMore = FALSE;
 984
 985     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 986     while (node)
 987     {
 988         wxWindow* win = node->GetData();
 989         if (SendIdleEvents(win))
 990             needMore = TRUE;
 991         node = node->GetNext();
 992     }
 993
 994     return needMore;
 995 }
 996
 997 // Send idle event to window and all subwindows
 998 bool wxApp::SendIdleEvents(wxWindow* win)
 999 {
1000     bool needMore = FALSE;
1001
1002     wxIdleEvent event;
1003     event.SetEventObject(win);
1004     win->GetEventHandler()->ProcessEvent(event);
1005
1006     if (event.MoreRequested())
1007         needMore = TRUE;
1008
1009     wxNode* node = win->GetChildren().First();
1010     while (node)
1011     {
1012         wxWindow* win = (wxWindow*) node->Data();
1013         if (SendIdleEvents(win))
1014             needMore = TRUE;
1015
1016         node = node->Next();
1017     }
1018     return needMore;
1019 }
1020
1021 void wxApp::DeletePendingObjects()
1022 {
1023     wxNode *node = wxPendingDelete.First();
1024     while (node)
1025     {
1026         wxObject *obj = (wxObject *)node->Data();
1027
1028         delete obj;
1029
1030         if (wxPendingDelete.Member(obj))
1031             delete node;
1032
1033         // Deleting one object may have deleted other pending
1034         // objects, so start from beginning of list again.
1035         node = wxPendingDelete.First();
1036     }
1037 }
1038
1039 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1040 {
1041     if (GetTopWindow())
1042         GetTopWindow()->Close(TRUE);
1043 }
1044
1045 // Default behaviour: close the application with prompts. The
1046 // user can veto the close, and therefore the end session.
1047 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1048 {
1049     if (GetTopWindow())
1050     {
1051         if (!GetTopWindow()->Close(!event.CanVeto()))
1052             event.Veto(TRUE);
1053     }
1054 }
1055
1056 wxLog* wxApp::CreateLogTarget()
1057 {
1058     return new wxLogGui;
1059 }
1060
1061 wxWindow* wxApp::GetTopWindow() const
1062 {
1063     if (m_topWindow)
1064         return m_topWindow;
1065     else if (wxTopLevelWindows.GetCount() > 0)
1066         return wxTopLevelWindows.GetFirst()->GetData();
1067     else
1068         return NULL;
1069 }
1070
1071 int wxApp::GetComCtl32Version() const
1072 {
1073     // have we loaded COMCTL32 yet?
1074     HMODULE theModule = ::GetModuleHandle("COMCTL32");
1075     int version = 0;
1076
1077     // if so, then we can check for the version
1078     if (theModule)
1079     {
1080         // InitCommonControlsEx is unique to 4.7 and later
1081         FARPROC theProc = ::GetProcAddress(theModule, "InitCommonControlsEx");
1082
1083         if (! theProc)
1084         {                    // not found, must be 4.00
1085             version = 400;
1086         }
1087         else
1088         {
1089             // The following symbol are unique to 4.71
1090             //   DllInstall
1091             //   FlatSB_EnableScrollBar FlatSB_GetScrollInfo FlatSB_GetScrollPos
1092             //   FlatSB_GetScrollProp FlatSB_GetScrollRange FlatSB_SetScrollInfo
1093             //   FlatSB_SetScrollPos FlatSB_SetScrollProp FlatSB_SetScrollRange
1094             //   FlatSB_ShowScrollBar
1095             //   _DrawIndirectImageList _DuplicateImageList
1096             //   InitializeFlatSB
1097             //   UninitializeFlatSB
1098             // we could check for any of these - I chose DllInstall
1099             FARPROC theProc = ::GetProcAddress(theModule, "DllInstall");
1100             if (! theProc)
1101             {
1102                 // not found, must be 4.70
1103                 version = 470;
1104             }
1105             else
1106             {                         // found, must be 4.71
1107                 version = 471;
1108             }
1109         }
1110     }
1111     return version;
1112 }
1113
1114 void wxExit()
1115 {
1116     wxLogError(_("Fatal error: exiting"));
1117
1118     wxApp::CleanUp();
1119 }
1120
1121 // Yield to incoming messages
1122 bool wxYield()
1123 {
1124     MSG msg;
1125     // We want to go back to the main message loop
1126     // if we see a WM_QUIT. (?)
1127 #ifdef __WXWINE__
1128     while (PeekMessage(&msg, (HWND)NULL, 0, 0, PM_NOREMOVE) && msg.message != WM_QUIT)
1129 #else
1130     while (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) && msg.message != WM_QUIT)
1131 #endif
1132     {
1133         if ( !wxTheApp->DoMessage() )
1134             break;
1135     }
1136     // If they are pending events, we must process them.
1137 #if wxUSE_THREADS
1138     wxTheApp->ProcessPendingEvents();
1139 #endif
1140
1141     return TRUE;
1142 }
1143
1144 HINSTANCE wxGetInstance()
1145 {
1146     return wxhInstance;
1147 }
1148
1149 void wxSetInstance(HINSTANCE hInst)
1150 {
1151     wxhInstance = hInst;
1152 }
1153
1154 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1155 // if in a separate file. So include it here to ensure it's linked.
1156 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
1157 #include "main.cpp"
1158 #endif