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     #pragma implementation "appbase.h"
  23 #endif
  24
  25 // For compilers that support precompilation, includes "wx.h".
  26 #include "wx/wxprec.h"
  27
  28 #if defined(__BORLANDC__)
  29     #pragma hdrstop
  30 #endif
  31
  32 #ifndef WX_PRECOMP
  33     #include "wx/frame.h"
  34     #include "wx/app.h"
  35     #include "wx/utils.h"
  36     #include "wx/gdicmn.h"
  37     #include "wx/pen.h"
  38     #include "wx/brush.h"
  39     #include "wx/cursor.h"
  40     #include "wx/icon.h"
  41     #include "wx/palette.h"
  42     #include "wx/dc.h"
  43     #include "wx/dialog.h"
  44     #include "wx/msgdlg.h"
  45     #include "wx/intl.h"
  46     #include "wx/dynarray.h"
  47 #   include "wx/wxchar.h"
  48 #   include "wx/icon.h"
  49 #endif
  50
  51 #include "wx/log.h"
  52 #include "wx/module.h"
  53
  54 #include "wx/msw/private.h"
  55
  56 #if wxUSE_THREADS
  57     #include "wx/thread.h"
  58
  59     // define the array of MSG strutures
  60     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
  61
  62     #include "wx/arrimpl.cpp"
  63
  64     WX_DEFINE_OBJARRAY(wxMsgArray);
  65 #endif // wxUSE_THREADS
  66
  67 #if wxUSE_WX_RESOURCES
  68     #include "wx/resource.h"
  69 #endif
  70
  71 // OLE is used for drag-and-drop, clipboard, OLE Automation...
  72 #ifndef wxUSE_NORLANDER_HEADERS
  73 #if defined(__GNUWIN32__) || defined(__SC__) || defined(__SALFORDC__)
  74     #undef wxUSE_OLE
  75
  76     #define  wxUSE_OLE 0
  77 #endif // broken compilers
  78 #endif
  79
  80 #if wxUSE_OLE
  81     #include <ole2.h>
  82 #endif
  83
  84 #include <string.h>
  85 #include <ctype.h>
  86
  87 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS)
  88     #include <commctrl.h>
  89 #endif
  90
  91 #include "wx/msw/msvcrt.h"
  92
  93 // ---------------------------------------------------------------------------
  94 // global variables
  95 // ---------------------------------------------------------------------------
  96
  97 extern wxChar *wxBuffer;
  98 extern wxChar *wxOsVersion;
  99 extern wxList *wxWinHandleList;
 100 extern wxList WXDLLEXPORT wxPendingDelete;
 101 #if wxUSE_THREADS
 102 extern wxList *wxPendingEvents;
 103 extern wxCriticalSection *wxPendingEventsLocker;
 104 #endif
 105 extern void wxSetKeyboardHook(bool doIt);
 106 extern wxCursor *g_globalCursor;
 107
 108 HINSTANCE wxhInstance = 0;
 109 MSG s_currentMsg;
 110 wxApp *wxTheApp = NULL;
 111
 112 // FIXME why not const? and not static?
 113
 114 // NB: all "NoRedraw" classes must have the same names as the "normal" classes
 115 //     with NR suffix - wxWindow::MSWCreate() supposes this
 116 wxChar wxFrameClassName[]         = _T("wxFrameClass");
 117 wxChar wxFrameClassNameNoRedraw[] = _T("wxFrameClassNR");
 118 wxChar wxMDIFrameClassName[]      = _T("wxMDIFrameClass");
 119 wxChar wxMDIFrameClassNameNoRedraw[] = _T("wxMDIFrameClassNR");
 120 wxChar wxMDIChildFrameClassName[] = _T("wxMDIChildFrameClass");
 121 wxChar wxMDIChildFrameClassNameNoRedraw[] = _T("wxMDIChildFrameClassNR");
 122 wxChar wxPanelClassName[]         = _T("wxPanelClass");
 123 wxChar wxCanvasClassName[]        = _T("wxCanvasClass");
 124
 125 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 126 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 127 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 128
 129 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 130 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 131 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 132
 133 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 134
 135 LRESULT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 136
 137 #if defined(__WIN95__) && !defined(__TWIN32__)
 138     #define wxUSE_RICHEDIT 1
 139 #else
 140     #define wxUSE_RICHEDIT 0
 141 #endif
 142
 143 #if wxUSE_RICHEDIT
 144     static HINSTANCE gs_hRichEdit = (HINSTANCE) NULL;
 145 #endif
 146
 147 // ===========================================================================
 148 // implementation
 149 // ===========================================================================
 150
 151 // ---------------------------------------------------------------------------
 152 // wxApp
 153 // ---------------------------------------------------------------------------
 154
 155 #if !USE_SHARED_LIBRARY
 156     IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 157
 158     BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 159         EVT_IDLE(wxApp::OnIdle)
 160         EVT_END_SESSION(wxApp::OnEndSession)
 161         EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 162     END_EVENT_TABLE()
 163 #endif
 164
 165 //// Initialize
 166 bool wxApp::Initialize()
 167 {
 168     // Some people may wish to use this, but
 169     // probably it shouldn't be here by default.
 170 #ifdef __WXDEBUG__
 171     //    wxRedirectIOToConsole();
 172 #endif
 173
 174     wxBuffer = new wxChar[1500]; // FIXME
 175
 176     wxClassInfo::InitializeClasses();
 177
 178 #if wxUSE_RESOURCES
 179     wxGetResource(_T("wxWindows"), _T("OsVersion"), &wxOsVersion);
 180 #endif
 181
 182     // I'm annoyed ... I don't know where to put this and I don't want to
 183     // create a module for that as it's part of the core.
 184 #if wxUSE_THREADS
 185     wxPendingEvents = new wxList();
 186     wxPendingEventsLocker = new wxCriticalSection();
 187 #endif
 188
 189     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 190     wxTheColourDatabase->Initialize();
 191
 192     wxInitializeStockLists();
 193     wxInitializeStockObjects();
 194
 195 #if wxUSE_WX_RESOURCES
 196     wxInitializeResourceSystem();
 197 #endif
 198
 199     wxBitmap::InitStandardHandlers();
 200
 201 #if defined(__WIN95__)
 202     InitCommonControls();
 203
 204 #if wxUSE_RICHEDIT
 205     gs_hRichEdit = LoadLibrary(_T("RICHED32.DLL"));
 206
 207     if (gs_hRichEdit == (HINSTANCE) NULL)
 208     {
 209         wxLogError(_("Could not initialise Rich Edit DLL"));
 210     }
 211 #endif // wxUSE_RICHEDIT
 212
 213 #endif // __WIN95__
 214
 215 #if wxUSE_OLE
 216
 217 #ifdef __WIN16__
 218     // for OLE, enlarge message queue to be as large as possible
 219     int iMsg = 96;
 220     while (!SetMessageQueue(iMsg) && (iMsg -= 8))
 221         ;
 222 #endif // Win16
 223     // we need to initialize OLE library
 224     if ( FAILED(::OleInitialize(NULL)) )
 225         wxLogError(_("Cannot initialize OLE"));
 226 #endif // wxUSE_OLE
 227
 228 #if wxUSE_CTL3D
 229     if (!Ctl3dRegister(wxhInstance))
 230         wxLogError(_T("Cannot register CTL3D"));
 231
 232     Ctl3dAutoSubclass(wxhInstance);
 233 #endif
 234
 235     g_globalCursor = new wxCursor;
 236
 237     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, _T("wxSTD_FRAME"));
 238     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, _T("wxSTD_MDIPARENTFRAME"));
 239     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, _T("wxSTD_MDICHILDFRAME"));
 240
 241     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, _T("wxDEFAULT_FRAME"));
 242     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, _T("wxDEFAULT_MDIPARENTFRAME"));
 243     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, _T("wxDEFAULT_MDICHILDFRAME"));
 244
 245     RegisterWindowClasses();
 246
 247     // Create the brush for disabling bitmap buttons
 248
 249     LOGBRUSH lb;
 250     lb.lbStyle = BS_PATTERN;
 251     lb.lbHatch = (int)LoadBitmap( wxhInstance, _T("wxDISABLE_BUTTON_BITMAP") );
 252     if ( lb.lbHatch )
 253     {
 254         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 255         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 256     }
 257     //else: wxWindows resources are probably not linked in
 258
 259 #if wxUSE_PENWINDOWS
 260     wxRegisterPenWin();
 261 #endif
 262
 263     wxWinHandleList = new wxList(wxKEY_INTEGER);
 264
 265     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 266     // PLEASE DO NOT ALTER THIS.
 267 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 268     extern char wxDummyChar;
 269     if (wxDummyChar) wxDummyChar++;
 270 #endif
 271
 272     wxSetKeyboardHook(TRUE);
 273
 274     wxModule::RegisterModules();
 275     if (!wxModule::InitializeModules())
 276         return FALSE;
 277     return TRUE;
 278 }
 279
 280 // ---------------------------------------------------------------------------
 281 // RegisterWindowClasses
 282 // ---------------------------------------------------------------------------
 283
 284 bool wxApp::RegisterWindowClasses()
 285 {
 286     WNDCLASS wndclass;
 287
 288     // for each class we register one with CS_(V|H)REDRAW style and one
 289     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 290     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 291     static const long styleNoRedraw = CS_DBLCLKS;
 292
 293     // the fields which are common to all classes
 294     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 295     wndclass.cbClsExtra    = 0;
 296     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 297     wndclass.hInstance     = wxhInstance;
 298     wndclass.hIcon         = (HICON) NULL;
 299     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 300     wndclass.lpszMenuName  = NULL;
 301
 302     // Register the frame window class.
 303     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 304     wndclass.style         = styleNormal;
 305     wndclass.lpszClassName = wxFrameClassName;
 306
 307     if ( !RegisterClass(&wndclass) )
 308     {
 309         wxLogLastError("RegisterClass(frame)");
 310
 311         return FALSE;
 312     }
 313
 314     // "no redraw" frame
 315     wndclass.lpszClassName = wxFrameClassNameNoRedraw;
 316     wndclass.style         = styleNoRedraw;
 317
 318     if ( !RegisterClass(&wndclass) )
 319     {
 320         wxLogLastError("RegisterClass(no redraw frame)");
 321
 322         return FALSE;
 323     }
 324
 325     // Register the MDI frame window class.
 326     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 327     wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
 328
 329     if ( !RegisterClass(&wndclass) )
 330     {
 331         wxLogLastError("RegisterClass(MDI parent)");
 332
 333         return FALSE;
 334     }
 335
 336     // "no redraw" MDI frame
 337     wndclass.lpszClassName = wxMDIFrameClassName;
 338     wndclass.style         = styleNoRedraw;
 339
 340     if ( !RegisterClass(&wndclass) )
 341     {
 342         wxLogLastError("RegisterClass(no redraw MDI parent frame)");
 343
 344         return FALSE;
 345     }
 346
 347     // Register the MDI child frame window class.
 348     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 349     wndclass.lpszClassName = wxMDIChildFrameClassName;
 350
 351     if ( !RegisterClass(&wndclass) )
 352     {
 353         wxLogLastError("RegisterClass(MDI child)");
 354
 355         return FALSE;
 356     }
 357
 358     // "no redraw" MDI child frame
 359     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 360     wndclass.style         = styleNoRedraw;
 361
 362     if ( !RegisterClass(&wndclass) )
 363     {
 364         wxLogLastError("RegisterClass(no redraw MDI child)");
 365
 366         return FALSE;
 367     }
 368
 369     // Register the panel window class.
 370     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 371     wndclass.lpszClassName = wxPanelClassName;
 372
 373     if ( !RegisterClass(&wndclass) )
 374     {
 375         wxLogLastError("RegisterClass(panel)");
 376
 377         return FALSE;
 378     }
 379
 380     // Register the canvas and textsubwindow class name
 381     wndclass.hbrBackground = (HBRUSH)NULL;
 382     wndclass.lpszClassName = wxCanvasClassName;
 383
 384     if ( !RegisterClass(&wndclass) )
 385     {
 386         wxLogLastError("RegisterClass(canvas)");
 387
 388         return FALSE;
 389     }
 390
 391     return TRUE;
 392 }
 393
 394 // ---------------------------------------------------------------------------
 395 // Convert Windows to argc, argv style
 396 // ---------------------------------------------------------------------------
 397
 398 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 399 {
 400     wxStringList args;
 401
 402     wxString cmdLine(lpCmdLine);
 403     int count = 0;
 404
 405     // Get application name
 406     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 407     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 408
 409     args.Add(name);
 410     count++;
 411
 412     wxStrcpy(name, wxFileNameFromPath(name));
 413     wxStripExtension(name);
 414     wxTheApp->SetAppName(name);
 415
 416     // Break up string
 417     // Treat strings enclosed in double-quotes as single arguments
 418     int i = 0;
 419     int len = cmdLine.Length();
 420     while (i < len)
 421     {
 422         // Skip whitespace
 423         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 424             i ++;
 425
 426         if (i < len)
 427         {
 428             if (cmdLine.GetChar(i) == _T('"')) // We found the start of a string
 429             {
 430                 i ++;
 431                 int first = i;
 432                 while ((i < len) && (cmdLine.GetChar(i) != _T('"')))
 433                     i ++;
 434
 435                 wxString arg(cmdLine.Mid(first, (i - first)));
 436
 437                 args.Add(arg);
 438                 count ++;
 439
 440                 if (i < len)
 441                     i ++; // Skip past 2nd quote
 442             }
 443             else // Unquoted argument
 444             {
 445                 int first = i;
 446                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 447                     i ++;
 448
 449                 wxString arg(cmdLine.Mid(first, (i - first)));
 450
 451                 args.Add(arg);
 452                 count ++;
 453             }
 454         }
 455     }
 456
 457     wxTheApp->argv = new wxChar*[count + 1];
 458     for (i = 0; i < count; i++)
 459     {
 460         wxString arg(args[i]);
 461         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 462     }
 463     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 464     wxTheApp->argc = count;
 465 }
 466
 467 //// Cleans up any wxWindows internal structures left lying around
 468
 469 void wxApp::CleanUp()
 470 {
 471     //// COMMON CLEANUP
 472
 473 #if wxUSE_LOG
 474     // flush the logged messages if any and install a 'safer' log target: the
 475     // default one (wxLogGui) can't be used after the resources are freed just
 476     // below and the user suppliedo ne might be even more unsafe (using any
 477     // wxWindows GUI function is unsafe starting from now)
 478     wxLog::DontCreateOnDemand();
 479
 480     // this will flush the old messages if any
 481     delete wxLog::SetActiveTarget(new wxLogStderr);
 482 #endif // wxUSE_LOG
 483
 484     // One last chance for pending objects to be cleaned up
 485     wxTheApp->DeletePendingObjects();
 486
 487     wxModule::CleanUpModules();
 488
 489 #if wxUSE_WX_RESOURCES
 490     wxCleanUpResourceSystem();
 491
 492     //  wxDefaultResourceTable->ClearTable();
 493 #endif
 494
 495     // Indicate that the cursor can be freed, so that cursor won't be deleted
 496     // by deleting the bitmap list before g_globalCursor goes out of scope
 497     // (double deletion of the cursor).
 498     wxSetCursor(wxNullCursor);
 499     delete g_globalCursor;
 500     g_globalCursor = NULL;
 501
 502     wxDeleteStockObjects();
 503
 504     // Destroy all GDI lists, etc.
 505     wxDeleteStockLists();
 506
 507     delete wxTheColourDatabase;
 508     wxTheColourDatabase = NULL;
 509
 510     wxBitmap::CleanUpHandlers();
 511
 512     delete[] wxBuffer;
 513     wxBuffer = NULL;
 514
 515     //// WINDOWS-SPECIFIC CLEANUP
 516
 517     wxSetKeyboardHook(FALSE);
 518
 519 #ifdef __WIN95__
 520
 521 #if wxUSE_RICHEDIT
 522     if (gs_hRichEdit != (HINSTANCE) NULL)
 523         FreeLibrary(gs_hRichEdit);
 524 #endif
 525
 526 #endif
 527
 528 #if wxUSE_PENWINDOWS
 529     wxCleanUpPenWin();
 530 #endif
 531
 532     if (wxSTD_FRAME_ICON)
 533         DestroyIcon(wxSTD_FRAME_ICON);
 534     if (wxSTD_MDICHILDFRAME_ICON)
 535         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 536     if (wxSTD_MDIPARENTFRAME_ICON)
 537         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 538
 539     if (wxDEFAULT_FRAME_ICON)
 540         DestroyIcon(wxDEFAULT_FRAME_ICON);
 541     if (wxDEFAULT_MDICHILDFRAME_ICON)
 542         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 543     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 544         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 545
 546     if ( wxDisableButtonBrush )
 547         ::DeleteObject( wxDisableButtonBrush );
 548
 549 #if wxUSE_OLE
 550     ::OleUninitialize();
 551 #endif
 552
 553 #if wxUSE_CTL3D
 554     Ctl3dUnregister(wxhInstance);
 555 #endif
 556
 557     if (wxWinHandleList)
 558         delete wxWinHandleList;
 559
 560     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 561     // create a module for that as it's part of the core.
 562 #if wxUSE_THREADS
 563     delete wxPendingEvents;
 564     delete wxPendingEventsLocker;
 565     // If we don't do the following, we get an apparent memory leak.
 566     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 567 #endif
 568
 569     wxClassInfo::CleanUpClasses();
 570
 571     delete wxTheApp;
 572     wxTheApp = NULL;
 573
 574 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 575     // At this point we want to check if there are any memory
 576     // blocks that aren't part of the wxDebugContext itself,
 577     // as a special case. Then when dumping we need to ignore
 578     // wxDebugContext, too.
 579     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 580     {
 581         wxLogDebug(_T("There were memory leaks."));
 582         wxDebugContext::Dump();
 583         wxDebugContext::PrintStatistics();
 584     }
 585     //  wxDebugContext::SetStream(NULL, NULL);
 586 #endif
 587
 588 #if wxUSE_LOG
 589     // do it as the very last thing because everything else can log messages
 590     delete wxLog::SetActiveTarget(NULL);
 591 #endif // wxUSE_LOG
 592 }
 593
 594 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 595
 596 // temporarily disable this warning which would be generated in release builds
 597 // because of __try
 598 #ifdef __VISUALC__
 599     #pragma warning(disable: 4715) // not all control paths return a value
 600 #endif // Visual C++
 601
 602 //// Main wxWindows entry point
 603 int wxEntry(WXHINSTANCE hInstance,
 604             WXHINSTANCE WXUNUSED(hPrevInstance),
 605             char *lpCmdLine,
 606             int nCmdShow,
 607             bool enterLoop)
 608 {
 609     // do check for memory leaks on program exit
 610     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 611     //  deallocated memory which may be used to simulate low-memory condition)
 612     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 613
 614     // take everything into a try-except block in release build
 615     // FIXME other compilers must support Win32 SEH (structured exception
 616     //       handling) too, just find the appropriate keyword in their docs!
 617     //       Please note that it's _not_ the same as C++ exceptions!
 618 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 619     #define CATCH_PROGRAM_EXCEPTIONS
 620
 621     __try {
 622 #else
 623     #undef  CATCH_PROGRAM_EXCEPTIONS
 624 #endif
 625
 626         wxhInstance = (HINSTANCE) hInstance;
 627
 628         if (!wxApp::Initialize())
 629             return 0;
 630
 631         // create the application object or ensure that one already exists
 632         if (!wxTheApp)
 633         {
 634             // The app may have declared a global application object, but we recommend
 635             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 636             // function for delayed, dynamic app object construction.
 637             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 638                          _T("No initializer - use IMPLEMENT_APP macro.") );
 639
 640             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 641         }
 642
 643         wxCHECK_MSG( wxTheApp, 0, _T("You have to define an instance of wxApp!") );
 644
 645         // save the WinMain() parameters
 646         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 647         wxTheApp->m_nCmdShow = nCmdShow;
 648
 649         // GUI-specific initialisation. In fact on Windows we don't have any,
 650         // but this call is provided for compatibility across platforms.
 651         wxTheApp->OnInitGui();
 652
 653         int retValue = 0;
 654
 655         if ( wxTheApp->OnInit() )
 656         {
 657             if ( enterLoop )
 658             {
 659                 retValue = wxTheApp->OnRun();
 660             }
 661             else
 662                 // We want to initialize, but not run or exit immediately.
 663                 return 1;
 664         }
 665         //else: app initialization failed, so we skipped OnRun()
 666
 667         wxWindow *topWindow = wxTheApp->GetTopWindow();
 668         if ( topWindow )
 669         {
 670             // Forcibly delete the window.
 671             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 672                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 673             {
 674                 topWindow->Close(TRUE);
 675                 wxTheApp->DeletePendingObjects();
 676             }
 677             else
 678             {
 679                 delete topWindow;
 680                 wxTheApp->SetTopWindow(NULL);
 681             }
 682         }
 683
 684         wxTheApp->OnExit();
 685
 686         wxApp::CleanUp();
 687
 688         return retValue;
 689
 690 #ifdef CATCH_PROGRAM_EXCEPTIONS
 691     }
 692     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 693         /*
 694            if ( wxTheApp )
 695            wxTheApp->OnFatalException();
 696          */
 697
 698         // using wxLog would be unsafe here
 699         ::MessageBox(NULL,
 700                      _("Unrecoverable program error detected: "
 701                      " the application will terminate."),
 702                      _("Fatal Error"),
 703                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 704
 705         ::ExitProcess(3); // the same exit code as abort()
 706
 707         // NOTREACHED
 708     }
 709 #endif // CATCH_PROGRAM_EXCEPTIONS
 710 }
 711
 712 // restore warning state
 713 #ifdef __VISUALC__
 714     #pragma warning(default: 4715) // not all control paths return a value
 715 #endif // Visual C++
 716
 717 #else /*  _WINDLL  */
 718
 719 //// Entry point for DLLs
 720
 721 int wxEntry(WXHINSTANCE hInstance)
 722 {
 723     wxhInstance = (HINSTANCE) hInstance;
 724     wxApp::Initialize();
 725
 726     // The app may have declared a global application object, but we recommend
 727     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 728     // for delayed, dynamic app object construction.
 729     if (!wxTheApp)
 730     {
 731         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 732                      "No initializer - use IMPLEMENT_APP macro." );
 733
 734         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 735     }
 736
 737     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 738
 739     wxTheApp->argc = 0;
 740     wxTheApp->argv = NULL;
 741
 742     wxTheApp->OnInitGui();
 743
 744     wxTheApp->OnInit();
 745
 746     wxWindow *topWindow = wxTheApp->GetTopWindow();
 747     if ( topWindow && topWindow->GetHWND())
 748     {
 749         topWindow->Show(TRUE);
 750     }
 751
 752     return 1;
 753 }
 754 #endif // _WINDLL
 755
 756 //// Static member initialization
 757
 758 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 759
 760 wxApp::wxApp()
 761 {
 762     m_topWindow = NULL;
 763     wxTheApp = this;
 764     m_wantDebugOutput = TRUE;
 765
 766     argc = 0;
 767     argv = NULL;
 768     m_printMode = wxPRINT_WINDOWS;
 769     m_exitOnFrameDelete = TRUE;
 770     m_auto3D = TRUE;
 771 }
 772
 773 wxApp::~wxApp()
 774 {
 775     // Delete command-line args
 776     int i;
 777     for (i = 0; i < argc; i++)
 778     {
 779         delete[] argv[i];
 780     }
 781     delete[] argv;
 782 }
 783
 784 bool wxApp::Initialized()
 785 {
 786 #ifndef _WINDLL
 787     if (GetTopWindow())
 788         return TRUE;
 789     else
 790         return FALSE;
 791 #endif
 792 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 793     return TRUE;
 794 #endif
 795 }
 796
 797 /*
 798  * Get and process a message, returning FALSE if WM_QUIT
 799  * received (and also set the flag telling the app to exit the main loop)
 800  *
 801  */
 802 bool wxApp::DoMessage()
 803 {
 804     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 805     if ( rc == 0 )
 806     {
 807         // got WM_QUIT
 808         m_keepGoing = FALSE;
 809
 810         return FALSE;
 811     }
 812     else if ( rc == -1 )
 813     {
 814         // should never happen, but let's test for it nevertheless
 815         wxLogLastError("GetMessage");
 816     }
 817     else
 818     {
 819 #if wxUSE_THREADS
 820         wxASSERT_MSG( wxThread::IsMain(),
 821                       _T("only the main thread can process Windows messages") );
 822
 823         static bool s_hadGuiLock = TRUE;
 824         static wxMsgArray s_aSavedMessages;
 825
 826         // if a secondary thread owns is doing GUI calls, save all messages for
 827         // later processing - we can't process them right now because it will
 828         // lead to recursive library calls (and we're not reentrant)
 829         if ( !wxGuiOwnedByMainThread() )
 830         {
 831             s_hadGuiLock = FALSE;
 832
 833             // leave out WM_COMMAND messages: too dangerous, sometimes
 834             // the message will be processed twice
 835             if ( !wxIsWaitingForThread() ||
 836                     s_currentMsg.message != WM_COMMAND )
 837             {
 838                 s_aSavedMessages.Add(s_currentMsg);
 839             }
 840
 841             return TRUE;
 842         }
 843         else
 844         {
 845             // have we just regained the GUI lock? if so, post all of the saved
 846             // messages
 847             //
 848             // FIXME of course, it's not _exactly_ the same as processing the
 849             //       messages normally - expect some things to break...
 850             if ( !s_hadGuiLock )
 851             {
 852                 s_hadGuiLock = TRUE;
 853
 854                 size_t count = s_aSavedMessages.Count();
 855                 for ( size_t n = 0; n < count; n++ )
 856                 {
 857                     MSG& msg = s_aSavedMessages[n];
 858
 859                     if ( !ProcessMessage((WXMSG *)&msg) )
 860                     {
 861                         ::TranslateMessage(&msg);
 862                         ::DispatchMessage(&msg);
 863                     }
 864                 }
 865
 866                 s_aSavedMessages.Empty();
 867             }
 868         }
 869 #endif // wxUSE_THREADS
 870
 871         // Process the message
 872         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 873         {
 874             ::TranslateMessage(&s_currentMsg);
 875             ::DispatchMessage(&s_currentMsg);
 876         }
 877     }
 878
 879     return TRUE;
 880 }
 881
 882 /*
 883  * Keep trying to process messages until WM_QUIT
 884  * received.
 885  *
 886  * If there are messages to be processed, they will all be
 887  * processed and OnIdle will not be called.
 888  * When there are no more messages, OnIdle is called.
 889  * If OnIdle requests more time,
 890  * it will be repeatedly called so long as there are no pending messages.
 891  * A 'feature' of this is that once OnIdle has decided that no more processing
 892  * is required, then it won't get processing time until further messages
 893  * are processed (it'll sit in DoMessage).
 894  */
 895
 896 int wxApp::MainLoop()
 897 {
 898     m_keepGoing = TRUE;
 899
 900     while ( m_keepGoing )
 901     {
 902 #if wxUSE_THREADS
 903         wxMutexGuiLeaveOrEnter();
 904 #endif // wxUSE_THREADS
 905
 906         while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 907                 ProcessIdle() )
 908         {
 909         }
 910
 911
 912         DoMessage();
 913     }
 914
 915     return s_currentMsg.wParam;
 916 }
 917
 918 // Returns TRUE if more time is needed.
 919 bool wxApp::ProcessIdle()
 920 {
 921     wxIdleEvent event;
 922     event.SetEventObject(this);
 923     ProcessEvent(event);
 924
 925     return event.MoreRequested();
 926 }
 927
 928 #if wxUSE_THREADS
 929 void wxApp::ProcessPendingEvents()
 930 {
 931     wxNode *node = wxPendingEvents->First();
 932     wxCriticalSectionLocker locker(*wxPendingEventsLocker);
 933
 934     while (node)
 935     {
 936         wxEvtHandler *handler = (wxEvtHandler *)node->Data();
 937
 938         handler->ProcessPendingEvents();
 939
 940         delete node;
 941         node = wxPendingEvents->First();
 942     }
 943 }
 944 #endif
 945
 946
 947 void wxApp::ExitMainLoop()
 948 {
 949     m_keepGoing = FALSE;
 950 }
 951
 952 bool wxApp::Pending()
 953 {
 954     return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0);
 955 }
 956
 957 void wxApp::Dispatch()
 958 {
 959     DoMessage();
 960 }
 961
 962 /*
 963  * Give all windows a chance to preprocess
 964  * the message. Some may have accelerator tables, or have
 965  * MDI complications.
 966  */
 967
 968 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 969 {
 970     MSG *msg = (MSG *)wxmsg;
 971     HWND hWnd = msg->hwnd;
 972     wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
 973
 974     // for some composite controls (like a combobox), wndThis might be NULL
 975     // because the subcontrol is not a wxWindow, but only the control itself
 976     // is - try to catch this case
 977     while ( hWnd && !wndThis )
 978     {
 979         hWnd = ::GetParent(hWnd);
 980         wndThis = wxFindWinFromHandle((WXHWND)hWnd);
 981     }
 982
 983     // Try translations first; find the youngest window with
 984     // a translation table.
 985     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 986     {
 987         if ( wnd->MSWTranslateMessage(wxmsg) )
 988             return TRUE;
 989     }
 990
 991     // Anyone for a non-translation message? Try youngest descendants first.
 992     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 993     {
 994         if ( wnd->MSWProcessMessage(wxmsg) )
 995             return TRUE;
 996     }
 997
 998     return FALSE;
 999 }
1000
1001 void wxApp::OnIdle(wxIdleEvent& event)
1002 {
1003     static bool s_inOnIdle = FALSE;
1004
1005     // Avoid recursion (via ProcessEvent default case)
1006     if ( s_inOnIdle )
1007         return;
1008
1009     s_inOnIdle = TRUE;
1010
1011     // 'Garbage' collection of windows deleted with Close().
1012     DeletePendingObjects();
1013
1014 #if wxUSE_LOG
1015     // flush the logged messages if any
1016     wxLog *pLog = wxLog::GetActiveTarget();
1017     if ( pLog != NULL && pLog->HasPendingMessages() )
1018         pLog->Flush();
1019 #endif // wxUSE_LOG
1020
1021     // Send OnIdle events to all windows
1022     if ( SendIdleEvents() )
1023     {
1024         // SendIdleEvents() returns TRUE if at least one window requested more
1025         // idle events
1026         event.RequestMore(TRUE);
1027     }
1028
1029     // If they are pending events, we must process them.
1030 #if wxUSE_THREADS
1031     ProcessPendingEvents();
1032 #endif
1033     s_inOnIdle = FALSE;
1034 }
1035
1036 // Send idle event to all top-level windows
1037 bool wxApp::SendIdleEvents()
1038 {
1039     bool needMore = FALSE;
1040
1041     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1042     while (node)
1043     {
1044         wxWindow* win = node->GetData();
1045         if (SendIdleEvents(win))
1046             needMore = TRUE;
1047         node = node->GetNext();
1048     }
1049
1050     return needMore;
1051 }
1052
1053 // Send idle event to window and all subwindows
1054 bool wxApp::SendIdleEvents(wxWindow* win)
1055 {
1056     bool needMore = FALSE;
1057
1058     wxIdleEvent event;
1059     event.SetEventObject(win);
1060     win->GetEventHandler()->ProcessEvent(event);
1061
1062     if (event.MoreRequested())
1063         needMore = TRUE;
1064
1065     wxNode* node = win->GetChildren().First();
1066     while (node)
1067     {
1068         wxWindow* win = (wxWindow*) node->Data();
1069         if (SendIdleEvents(win))
1070             needMore = TRUE;
1071
1072         node = node->Next();
1073     }
1074     return needMore;
1075 }
1076
1077 void wxApp::DeletePendingObjects()
1078 {
1079     wxNode *node = wxPendingDelete.First();
1080     while (node)
1081     {
1082         wxObject *obj = (wxObject *)node->Data();
1083
1084         delete obj;
1085
1086         if (wxPendingDelete.Member(obj))
1087             delete node;
1088
1089         // Deleting one object may have deleted other pending
1090         // objects, so start from beginning of list again.
1091         node = wxPendingDelete.First();
1092     }
1093 }
1094
1095 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1096 {
1097     if (GetTopWindow())
1098         GetTopWindow()->Close(TRUE);
1099 }
1100
1101 // Default behaviour: close the application with prompts. The
1102 // user can veto the close, and therefore the end session.
1103 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1104 {
1105     if (GetTopWindow())
1106     {
1107         if (!GetTopWindow()->Close(!event.CanVeto()))
1108             event.Veto(TRUE);
1109     }
1110 }
1111
1112 int wxApp::GetComCtl32Version() const
1113 {
1114     // have we loaded COMCTL32 yet?
1115     HMODULE theModule = ::GetModuleHandle(_T("COMCTL32"));
1116     int version = 0;
1117
1118     // if so, then we can check for the version
1119     if (theModule)
1120     {
1121         // InitCommonControlsEx is unique to 4.7 and later
1122         FARPROC theProc = ::GetProcAddress(theModule, "InitCommonControlsEx");
1123
1124         if (! theProc)
1125         {                    // not found, must be 4.00
1126             version = 400;
1127         }
1128         else
1129         {
1130             // The following symbol are unique to 4.71
1131             //   DllInstall
1132             //   FlatSB_EnableScrollBar FlatSB_GetScrollInfo FlatSB_GetScrollPos
1133             //   FlatSB_GetScrollProp FlatSB_GetScrollRange FlatSB_SetScrollInfo
1134             //   FlatSB_SetScrollPos FlatSB_SetScrollProp FlatSB_SetScrollRange
1135             //   FlatSB_ShowScrollBar
1136             //   _DrawIndirectImageList _DuplicateImageList
1137             //   InitializeFlatSB
1138             //   UninitializeFlatSB
1139             // we could check for any of these - I chose DllInstall
1140             FARPROC theProc = ::GetProcAddress(theModule, "DllInstall");
1141             if (! theProc)
1142             {
1143                 // not found, must be 4.70
1144                 version = 470;
1145             }
1146             else
1147             {                         // found, must be 4.71
1148                 version = 471;
1149             }
1150         }
1151     }
1152     return version;
1153 }
1154
1155 void wxExit()
1156 {
1157     wxLogError(_("Fatal error: exiting"));
1158
1159     wxApp::CleanUp();
1160 }
1161
1162 // Yield to incoming messages
1163 bool wxYield()
1164 {
1165     MSG msg;
1166     // We want to go back to the main message loop
1167     // if we see a WM_QUIT. (?)
1168 #ifdef __WXWINE__
1169     while (PeekMessage(&msg, (HWND)NULL, 0, 0, PM_NOREMOVE) && msg.message != WM_QUIT)
1170 #else
1171     while (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) && msg.message != WM_QUIT)
1172 #endif
1173     {
1174         if ( !wxTheApp->DoMessage() )
1175             break;
1176     }
1177     // If they are pending events, we must process them.
1178 #if wxUSE_THREADS
1179     wxTheApp->ProcessPendingEvents();
1180 #endif
1181
1182     return TRUE;
1183 }
1184
1185 wxIcon
1186 wxApp::GetStdIcon(int which) const
1187 {
1188     switch(which)
1189     {
1190         case wxICON_INFORMATION:
1191             return wxIcon("wxICON_INFO");
1192
1193         case wxICON_QUESTION:
1194             return wxIcon("wxICON_QUESTION");
1195
1196         case wxICON_EXCLAMATION:
1197             return wxIcon("wxICON_WARNING");
1198
1199         default:
1200             wxFAIL_MSG(_T("requested non existent standard icon"));
1201             // still fall through
1202
1203         case wxICON_HAND:
1204             return wxIcon("wxICON_ERROR");
1205     }
1206 }
1207
1208
1209 HINSTANCE wxGetInstance()
1210 {
1211     return wxhInstance;
1212 }
1213
1214 void wxSetInstance(HINSTANCE hInst)
1215 {
1216     wxhInstance = hInst;
1217 }
1218
1219 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1220 // if in a separate file. So include it here to ensure it's linked.
1221 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
1222 #include "main.cpp"
1223 #endif