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[]         = wxT("wxFrameClass");
 117 wxChar wxFrameClassNameNoRedraw[] = wxT("wxFrameClassNR");
 118 wxChar wxMDIFrameClassName[]      = wxT("wxMDIFrameClass");
 119 wxChar wxMDIFrameClassNameNoRedraw[] = wxT("wxMDIFrameClassNR");
 120 wxChar wxMDIChildFrameClassName[] = wxT("wxMDIChildFrameClass");
 121 wxChar wxMDIChildFrameClassNameNoRedraw[] = wxT("wxMDIChildFrameClassNR");
 122 wxChar wxPanelClassName[]         = wxT("wxPanelClass");
 123 wxChar wxCanvasClassName[]        = wxT("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(wxT("wxWindows"), wxT("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(wxT("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(wxT("Cannot register CTL3D"));
 231
 232     Ctl3dAutoSubclass(wxhInstance);
 233 #endif
 234
 235     g_globalCursor = new wxCursor;
 236
 237     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
 238     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
 239     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
 240
 241     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
 242     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
 243     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("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, wxT("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 // TODO we should only register classes really used by the app. For this it
 285 //      would be enough to just delay the class registration until an attempt
 286 //      to create a window of this class is made.
 287 bool wxApp::RegisterWindowClasses()
 288 {
 289     WNDCLASS wndclass;
 290
 291     // for each class we register one with CS_(V|H)REDRAW style and one
 292     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 293     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 294     static const long styleNoRedraw = CS_DBLCLKS;
 295
 296     // the fields which are common to all classes
 297     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 298     wndclass.cbClsExtra    = 0;
 299     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 300     wndclass.hInstance     = wxhInstance;
 301     wndclass.hIcon         = (HICON) NULL;
 302     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 303     wndclass.lpszMenuName  = NULL;
 304
 305     // Register the frame window class.
 306     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 307     wndclass.lpszClassName = wxFrameClassName;
 308     wndclass.style         = styleNormal;
 309
 310     if ( !RegisterClass(&wndclass) )
 311     {
 312         wxLogLastError("RegisterClass(frame)");
 313
 314         return FALSE;
 315     }
 316
 317     // "no redraw" frame
 318     wndclass.lpszClassName = wxFrameClassNameNoRedraw;
 319     wndclass.style         = styleNoRedraw;
 320
 321     if ( !RegisterClass(&wndclass) )
 322     {
 323         wxLogLastError("RegisterClass(no redraw frame)");
 324
 325         return FALSE;
 326     }
 327
 328     // Register the MDI frame window class.
 329     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 330     wndclass.lpszClassName = wxMDIFrameClassName;
 331     wndclass.style         = styleNormal;
 332
 333     if ( !RegisterClass(&wndclass) )
 334     {
 335         wxLogLastError("RegisterClass(MDI parent)");
 336
 337         return FALSE;
 338     }
 339
 340     // "no redraw" MDI frame
 341     wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
 342     wndclass.style         = styleNoRedraw;
 343
 344     if ( !RegisterClass(&wndclass) )
 345     {
 346         wxLogLastError("RegisterClass(no redraw MDI parent frame)");
 347
 348         return FALSE;
 349     }
 350
 351     // Register the MDI child frame window class.
 352     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 353     wndclass.lpszClassName = wxMDIChildFrameClassName;
 354     wndclass.style         = styleNormal;
 355
 356     if ( !RegisterClass(&wndclass) )
 357     {
 358         wxLogLastError("RegisterClass(MDI child)");
 359
 360         return FALSE;
 361     }
 362
 363     // "no redraw" MDI child frame
 364     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 365     wndclass.style         = styleNoRedraw;
 366
 367     if ( !RegisterClass(&wndclass) )
 368     {
 369         wxLogLastError("RegisterClass(no redraw MDI child)");
 370
 371         return FALSE;
 372     }
 373
 374     // Register the panel window class.
 375     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 376     wndclass.lpszClassName = wxPanelClassName;
 377     wndclass.style         = styleNormal;
 378
 379     if ( !RegisterClass(&wndclass) )
 380     {
 381         wxLogLastError("RegisterClass(panel)");
 382
 383         return FALSE;
 384     }
 385
 386     // Register the canvas and textsubwindow class name
 387     wndclass.hbrBackground = (HBRUSH)NULL;
 388     wndclass.lpszClassName = wxCanvasClassName;
 389
 390     if ( !RegisterClass(&wndclass) )
 391     {
 392         wxLogLastError("RegisterClass(canvas)");
 393
 394         return FALSE;
 395     }
 396
 397     return TRUE;
 398 }
 399
 400 // ---------------------------------------------------------------------------
 401 // Convert Windows to argc, argv style
 402 // ---------------------------------------------------------------------------
 403
 404 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 405 {
 406     wxStringList args;
 407
 408     wxString cmdLine(lpCmdLine);
 409     int count = 0;
 410
 411     // Get application name
 412     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 413     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 414
 415     args.Add(name);
 416     count++;
 417
 418     wxStrcpy(name, wxFileNameFromPath(name));
 419     wxStripExtension(name);
 420     wxTheApp->SetAppName(name);
 421
 422     // Break up string
 423     // Treat strings enclosed in double-quotes as single arguments
 424     int i = 0;
 425     int len = cmdLine.Length();
 426     while (i < len)
 427     {
 428         // Skip whitespace
 429         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 430             i ++;
 431
 432         if (i < len)
 433         {
 434             if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
 435             {
 436                 i ++;
 437                 int first = i;
 438                 while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
 439                     i ++;
 440
 441                 wxString arg(cmdLine.Mid(first, (i - first)));
 442
 443                 args.Add(arg);
 444                 count ++;
 445
 446                 if (i < len)
 447                     i ++; // Skip past 2nd quote
 448             }
 449             else // Unquoted argument
 450             {
 451                 int first = i;
 452                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 453                     i ++;
 454
 455                 wxString arg(cmdLine.Mid(first, (i - first)));
 456
 457                 args.Add(arg);
 458                 count ++;
 459             }
 460         }
 461     }
 462
 463     wxTheApp->argv = new wxChar*[count + 1];
 464     for (i = 0; i < count; i++)
 465     {
 466         wxString arg(args[i]);
 467         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 468     }
 469     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 470     wxTheApp->argc = count;
 471 }
 472
 473 //// Cleans up any wxWindows internal structures left lying around
 474
 475 void wxApp::CleanUp()
 476 {
 477     //// COMMON CLEANUP
 478
 479 #if wxUSE_LOG
 480     // flush the logged messages if any and install a 'safer' log target: the
 481     // default one (wxLogGui) can't be used after the resources are freed just
 482     // below and the user suppliedo ne might be even more unsafe (using any
 483     // wxWindows GUI function is unsafe starting from now)
 484     wxLog::DontCreateOnDemand();
 485
 486     // this will flush the old messages if any
 487     delete wxLog::SetActiveTarget(new wxLogStderr);
 488 #endif // wxUSE_LOG
 489
 490     // One last chance for pending objects to be cleaned up
 491     wxTheApp->DeletePendingObjects();
 492
 493     wxModule::CleanUpModules();
 494
 495 #if wxUSE_WX_RESOURCES
 496     wxCleanUpResourceSystem();
 497
 498     //  wxDefaultResourceTable->ClearTable();
 499 #endif
 500
 501     // Indicate that the cursor can be freed, so that cursor won't be deleted
 502     // by deleting the bitmap list before g_globalCursor goes out of scope
 503     // (double deletion of the cursor).
 504     wxSetCursor(wxNullCursor);
 505     delete g_globalCursor;
 506     g_globalCursor = NULL;
 507
 508     wxDeleteStockObjects();
 509
 510     // Destroy all GDI lists, etc.
 511     wxDeleteStockLists();
 512
 513     delete wxTheColourDatabase;
 514     wxTheColourDatabase = NULL;
 515
 516     wxBitmap::CleanUpHandlers();
 517
 518     delete[] wxBuffer;
 519     wxBuffer = NULL;
 520
 521     //// WINDOWS-SPECIFIC CLEANUP
 522
 523     wxSetKeyboardHook(FALSE);
 524
 525 #ifdef __WIN95__
 526
 527 #if wxUSE_RICHEDIT
 528     if (gs_hRichEdit != (HINSTANCE) NULL)
 529         FreeLibrary(gs_hRichEdit);
 530 #endif
 531
 532 #endif
 533
 534 #if wxUSE_PENWINDOWS
 535     wxCleanUpPenWin();
 536 #endif
 537
 538     if (wxSTD_FRAME_ICON)
 539         DestroyIcon(wxSTD_FRAME_ICON);
 540     if (wxSTD_MDICHILDFRAME_ICON)
 541         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 542     if (wxSTD_MDIPARENTFRAME_ICON)
 543         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 544
 545     if (wxDEFAULT_FRAME_ICON)
 546         DestroyIcon(wxDEFAULT_FRAME_ICON);
 547     if (wxDEFAULT_MDICHILDFRAME_ICON)
 548         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 549     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 550         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 551
 552     if ( wxDisableButtonBrush )
 553         ::DeleteObject( wxDisableButtonBrush );
 554
 555 #if wxUSE_OLE
 556     ::OleUninitialize();
 557 #endif
 558
 559 #if wxUSE_CTL3D
 560     Ctl3dUnregister(wxhInstance);
 561 #endif
 562
 563     if (wxWinHandleList)
 564         delete wxWinHandleList;
 565
 566     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 567     // create a module for that as it's part of the core.
 568 #if wxUSE_THREADS
 569     delete wxPendingEvents;
 570     delete wxPendingEventsLocker;
 571     // If we don't do the following, we get an apparent memory leak.
 572     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 573 #endif
 574
 575     wxClassInfo::CleanUpClasses();
 576
 577     delete wxTheApp;
 578     wxTheApp = NULL;
 579
 580 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 581     // At this point we want to check if there are any memory
 582     // blocks that aren't part of the wxDebugContext itself,
 583     // as a special case. Then when dumping we need to ignore
 584     // wxDebugContext, too.
 585     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 586     {
 587         wxLogDebug(wxT("There were memory leaks."));
 588         wxDebugContext::Dump();
 589         wxDebugContext::PrintStatistics();
 590     }
 591     //  wxDebugContext::SetStream(NULL, NULL);
 592 #endif
 593
 594 #if wxUSE_LOG
 595     // do it as the very last thing because everything else can log messages
 596     delete wxLog::SetActiveTarget(NULL);
 597 #endif // wxUSE_LOG
 598 }
 599
 600 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 601
 602 // temporarily disable this warning which would be generated in release builds
 603 // because of __try
 604 #ifdef __VISUALC__
 605     #pragma warning(disable: 4715) // not all control paths return a value
 606 #endif // Visual C++
 607
 608 //// Main wxWindows entry point
 609 int wxEntry(WXHINSTANCE hInstance,
 610             WXHINSTANCE WXUNUSED(hPrevInstance),
 611             char *lpCmdLine,
 612             int nCmdShow,
 613             bool enterLoop)
 614 {
 615     // do check for memory leaks on program exit
 616     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 617     //  deallocated memory which may be used to simulate low-memory condition)
 618     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 619
 620     // take everything into a try-except block in release build
 621     // FIXME other compilers must support Win32 SEH (structured exception
 622     //       handling) too, just find the appropriate keyword in their docs!
 623     //       Please note that it's _not_ the same as C++ exceptions!
 624 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 625     #define CATCH_PROGRAM_EXCEPTIONS
 626
 627     __try {
 628 #else
 629     #undef  CATCH_PROGRAM_EXCEPTIONS
 630 #endif
 631
 632         wxhInstance = (HINSTANCE) hInstance;
 633
 634         if (!wxApp::Initialize())
 635             return 0;
 636
 637         // create the application object or ensure that one already exists
 638         if (!wxTheApp)
 639         {
 640             // The app may have declared a global application object, but we recommend
 641             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 642             // function for delayed, dynamic app object construction.
 643             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 644                          wxT("No initializer - use IMPLEMENT_APP macro.") );
 645
 646             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 647         }
 648
 649         wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
 650
 651         // save the WinMain() parameters
 652         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 653         wxTheApp->m_nCmdShow = nCmdShow;
 654
 655         // GUI-specific initialisation. In fact on Windows we don't have any,
 656         // but this call is provided for compatibility across platforms.
 657         wxTheApp->OnInitGui();
 658
 659         int retValue = 0;
 660
 661         if ( wxTheApp->OnInit() )
 662         {
 663             if ( enterLoop )
 664             {
 665                 retValue = wxTheApp->OnRun();
 666             }
 667             else
 668                 // We want to initialize, but not run or exit immediately.
 669                 return 1;
 670         }
 671         //else: app initialization failed, so we skipped OnRun()
 672
 673         wxWindow *topWindow = wxTheApp->GetTopWindow();
 674         if ( topWindow )
 675         {
 676             // Forcibly delete the window.
 677             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 678                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 679             {
 680                 topWindow->Close(TRUE);
 681                 wxTheApp->DeletePendingObjects();
 682             }
 683             else
 684             {
 685                 delete topWindow;
 686                 wxTheApp->SetTopWindow(NULL);
 687             }
 688         }
 689
 690         wxTheApp->OnExit();
 691
 692         wxApp::CleanUp();
 693
 694         return retValue;
 695
 696 #ifdef CATCH_PROGRAM_EXCEPTIONS
 697     }
 698     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 699         /*
 700            if ( wxTheApp )
 701            wxTheApp->OnFatalException();
 702          */
 703
 704         // using wxLog would be unsafe here
 705         ::MessageBox(NULL,
 706                      _("Unrecoverable program error detected: "
 707                      " the application will terminate."),
 708                      _("Fatal Error"),
 709                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 710
 711         ::ExitProcess(3); // the same exit code as abort()
 712
 713         // NOTREACHED
 714     }
 715 #endif // CATCH_PROGRAM_EXCEPTIONS
 716 }
 717
 718 // restore warning state
 719 #ifdef __VISUALC__
 720     #pragma warning(default: 4715) // not all control paths return a value
 721 #endif // Visual C++
 722
 723 #else /*  _WINDLL  */
 724
 725 //// Entry point for DLLs
 726
 727 int wxEntry(WXHINSTANCE hInstance)
 728 {
 729     wxhInstance = (HINSTANCE) hInstance;
 730     wxApp::Initialize();
 731
 732     // The app may have declared a global application object, but we recommend
 733     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 734     // for delayed, dynamic app object construction.
 735     if (!wxTheApp)
 736     {
 737         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 738                      "No initializer - use IMPLEMENT_APP macro." );
 739
 740         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 741     }
 742
 743     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 744
 745     wxTheApp->argc = 0;
 746     wxTheApp->argv = NULL;
 747
 748     wxTheApp->OnInitGui();
 749
 750     wxTheApp->OnInit();
 751
 752     wxWindow *topWindow = wxTheApp->GetTopWindow();
 753     if ( topWindow && topWindow->GetHWND())
 754     {
 755         topWindow->Show(TRUE);
 756     }
 757
 758     return 1;
 759 }
 760 #endif // _WINDLL
 761
 762 //// Static member initialization
 763
 764 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 765
 766 wxApp::wxApp()
 767 {
 768     m_topWindow = NULL;
 769     wxTheApp = this;
 770     m_wantDebugOutput = TRUE;
 771
 772     argc = 0;
 773     argv = NULL;
 774     m_printMode = wxPRINT_WINDOWS;
 775     m_exitOnFrameDelete = TRUE;
 776     m_auto3D = TRUE;
 777 }
 778
 779 wxApp::~wxApp()
 780 {
 781     // Delete command-line args
 782     int i;
 783     for (i = 0; i < argc; i++)
 784     {
 785         delete[] argv[i];
 786     }
 787     delete[] argv;
 788 }
 789
 790 bool wxApp::Initialized()
 791 {
 792 #ifndef _WINDLL
 793     if (GetTopWindow())
 794         return TRUE;
 795     else
 796         return FALSE;
 797 #endif
 798 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 799     return TRUE;
 800 #endif
 801 }
 802
 803 /*
 804  * Get and process a message, returning FALSE if WM_QUIT
 805  * received (and also set the flag telling the app to exit the main loop)
 806  *
 807  */
 808 bool wxApp::DoMessage()
 809 {
 810     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 811     if ( rc == 0 )
 812     {
 813         // got WM_QUIT
 814         m_keepGoing = FALSE;
 815
 816         return FALSE;
 817     }
 818     else if ( rc == -1 )
 819     {
 820         // should never happen, but let's test for it nevertheless
 821         wxLogLastError("GetMessage");
 822     }
 823     else
 824     {
 825 #if wxUSE_THREADS
 826         wxASSERT_MSG( wxThread::IsMain(),
 827                       wxT("only the main thread can process Windows messages") );
 828
 829         static bool s_hadGuiLock = TRUE;
 830         static wxMsgArray s_aSavedMessages;
 831
 832         // if a secondary thread owns is doing GUI calls, save all messages for
 833         // later processing - we can't process them right now because it will
 834         // lead to recursive library calls (and we're not reentrant)
 835         if ( !wxGuiOwnedByMainThread() )
 836         {
 837             s_hadGuiLock = FALSE;
 838
 839             // leave out WM_COMMAND messages: too dangerous, sometimes
 840             // the message will be processed twice
 841             if ( !wxIsWaitingForThread() ||
 842                     s_currentMsg.message != WM_COMMAND )
 843             {
 844                 s_aSavedMessages.Add(s_currentMsg);
 845             }
 846
 847             return TRUE;
 848         }
 849         else
 850         {
 851             // have we just regained the GUI lock? if so, post all of the saved
 852             // messages
 853             //
 854             // FIXME of course, it's not _exactly_ the same as processing the
 855             //       messages normally - expect some things to break...
 856             if ( !s_hadGuiLock )
 857             {
 858                 s_hadGuiLock = TRUE;
 859
 860                 size_t count = s_aSavedMessages.Count();
 861                 for ( size_t n = 0; n < count; n++ )
 862                 {
 863                     MSG& msg = s_aSavedMessages[n];
 864
 865                     if ( !ProcessMessage((WXMSG *)&msg) )
 866                     {
 867                         ::TranslateMessage(&msg);
 868                         ::DispatchMessage(&msg);
 869                     }
 870                 }
 871
 872                 s_aSavedMessages.Empty();
 873             }
 874         }
 875 #endif // wxUSE_THREADS
 876
 877         // Process the message
 878         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 879         {
 880             ::TranslateMessage(&s_currentMsg);
 881             ::DispatchMessage(&s_currentMsg);
 882         }
 883     }
 884
 885     return TRUE;
 886 }
 887
 888 /*
 889  * Keep trying to process messages until WM_QUIT
 890  * received.
 891  *
 892  * If there are messages to be processed, they will all be
 893  * processed and OnIdle will not be called.
 894  * When there are no more messages, OnIdle is called.
 895  * If OnIdle requests more time,
 896  * it will be repeatedly called so long as there are no pending messages.
 897  * A 'feature' of this is that once OnIdle has decided that no more processing
 898  * is required, then it won't get processing time until further messages
 899  * are processed (it'll sit in DoMessage).
 900  */
 901
 902 int wxApp::MainLoop()
 903 {
 904     m_keepGoing = TRUE;
 905
 906     while ( m_keepGoing )
 907     {
 908 #if wxUSE_THREADS
 909         wxMutexGuiLeaveOrEnter();
 910 #endif // wxUSE_THREADS
 911
 912         while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 913                 ProcessIdle() )
 914         {
 915         }
 916
 917
 918         DoMessage();
 919     }
 920
 921     return s_currentMsg.wParam;
 922 }
 923
 924 // Returns TRUE if more time is needed.
 925 bool wxApp::ProcessIdle()
 926 {
 927     wxIdleEvent event;
 928     event.SetEventObject(this);
 929     ProcessEvent(event);
 930
 931     return event.MoreRequested();
 932 }
 933
 934 #if wxUSE_THREADS
 935 void wxApp::ProcessPendingEvents()
 936 {
 937     wxNode *node = wxPendingEvents->First();
 938     wxCriticalSectionLocker locker(*wxPendingEventsLocker);
 939
 940     while (node)
 941     {
 942         wxEvtHandler *handler = (wxEvtHandler *)node->Data();
 943
 944         handler->ProcessPendingEvents();
 945
 946         delete node;
 947         node = wxPendingEvents->First();
 948     }
 949 }
 950 #endif
 951
 952
 953 void wxApp::ExitMainLoop()
 954 {
 955     m_keepGoing = FALSE;
 956 }
 957
 958 bool wxApp::Pending()
 959 {
 960     return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0);
 961 }
 962
 963 void wxApp::Dispatch()
 964 {
 965     DoMessage();
 966 }
 967
 968 /*
 969  * Give all windows a chance to preprocess
 970  * the message. Some may have accelerator tables, or have
 971  * MDI complications.
 972  */
 973
 974 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 975 {
 976     MSG *msg = (MSG *)wxmsg;
 977     HWND hWnd = msg->hwnd;
 978     wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
 979
 980     // for some composite controls (like a combobox), wndThis might be NULL
 981     // because the subcontrol is not a wxWindow, but only the control itself
 982     // is - try to catch this case
 983     while ( hWnd && !wndThis )
 984     {
 985         hWnd = ::GetParent(hWnd);
 986         wndThis = wxFindWinFromHandle((WXHWND)hWnd);
 987     }
 988
 989     // Try translations first; find the youngest window with
 990     // a translation table.
 991     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 992     {
 993         if ( wnd->MSWTranslateMessage(wxmsg) )
 994             return TRUE;
 995     }
 996
 997     // Anyone for a non-translation message? Try youngest descendants first.
 998     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 999     {
1000         if ( wnd->MSWProcessMessage(wxmsg) )
1001             return TRUE;
1002     }
1003
1004     return FALSE;
1005 }
1006
1007 void wxApp::OnIdle(wxIdleEvent& event)
1008 {
1009     static bool s_inOnIdle = FALSE;
1010
1011     // Avoid recursion (via ProcessEvent default case)
1012     if ( s_inOnIdle )
1013         return;
1014
1015     s_inOnIdle = TRUE;
1016
1017     // 'Garbage' collection of windows deleted with Close().
1018     DeletePendingObjects();
1019
1020 #if wxUSE_LOG
1021     // flush the logged messages if any
1022     wxLog *pLog = wxLog::GetActiveTarget();
1023     if ( pLog != NULL && pLog->HasPendingMessages() )
1024         pLog->Flush();
1025 #endif // wxUSE_LOG
1026
1027     // Send OnIdle events to all windows
1028     if ( SendIdleEvents() )
1029     {
1030         // SendIdleEvents() returns TRUE if at least one window requested more
1031         // idle events
1032         event.RequestMore(TRUE);
1033     }
1034
1035     // If they are pending events, we must process them.
1036 #if wxUSE_THREADS
1037     ProcessPendingEvents();
1038 #endif
1039     s_inOnIdle = FALSE;
1040 }
1041
1042 // Send idle event to all top-level windows
1043 bool wxApp::SendIdleEvents()
1044 {
1045     bool needMore = FALSE;
1046
1047     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1048     while (node)
1049     {
1050         wxWindow* win = node->GetData();
1051         if (SendIdleEvents(win))
1052             needMore = TRUE;
1053         node = node->GetNext();
1054     }
1055
1056     return needMore;
1057 }
1058
1059 // Send idle event to window and all subwindows
1060 bool wxApp::SendIdleEvents(wxWindow* win)
1061 {
1062     bool needMore = FALSE;
1063
1064     wxIdleEvent event;
1065     event.SetEventObject(win);
1066     win->GetEventHandler()->ProcessEvent(event);
1067
1068     if (event.MoreRequested())
1069         needMore = TRUE;
1070
1071     wxNode* node = win->GetChildren().First();
1072     while (node)
1073     {
1074         wxWindow* win = (wxWindow*) node->Data();
1075         if (SendIdleEvents(win))
1076             needMore = TRUE;
1077
1078         node = node->Next();
1079     }
1080     return needMore;
1081 }
1082
1083 void wxApp::DeletePendingObjects()
1084 {
1085     wxNode *node = wxPendingDelete.First();
1086     while (node)
1087     {
1088         wxObject *obj = (wxObject *)node->Data();
1089
1090         delete obj;
1091
1092         if (wxPendingDelete.Member(obj))
1093             delete node;
1094
1095         // Deleting one object may have deleted other pending
1096         // objects, so start from beginning of list again.
1097         node = wxPendingDelete.First();
1098     }
1099 }
1100
1101 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1102 {
1103     if (GetTopWindow())
1104         GetTopWindow()->Close(TRUE);
1105 }
1106
1107 // Default behaviour: close the application with prompts. The
1108 // user can veto the close, and therefore the end session.
1109 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1110 {
1111     if (GetTopWindow())
1112     {
1113         if (!GetTopWindow()->Close(!event.CanVeto()))
1114             event.Veto(TRUE);
1115     }
1116 }
1117
1118 int wxApp::GetComCtl32Version() const
1119 {
1120     // have we loaded COMCTL32 yet?
1121     HMODULE theModule = ::GetModuleHandle(wxT("COMCTL32"));
1122     int version = 0;
1123
1124     // if so, then we can check for the version
1125     if (theModule)
1126     {
1127         // InitCommonControlsEx is unique to 4.7 and later
1128         FARPROC theProc = ::GetProcAddress(theModule, "InitCommonControlsEx");
1129
1130         if (! theProc)
1131         {                    // not found, must be 4.00
1132             version = 400;
1133         }
1134         else
1135         {
1136             // The following symbol are unique to 4.71
1137             //   DllInstall
1138             //   FlatSB_EnableScrollBar FlatSB_GetScrollInfo FlatSB_GetScrollPos
1139             //   FlatSB_GetScrollProp FlatSB_GetScrollRange FlatSB_SetScrollInfo
1140             //   FlatSB_SetScrollPos FlatSB_SetScrollProp FlatSB_SetScrollRange
1141             //   FlatSB_ShowScrollBar
1142             //   _DrawIndirectImageList _DuplicateImageList
1143             //   InitializeFlatSB
1144             //   UninitializeFlatSB
1145             // we could check for any of these - I chose DllInstall
1146             FARPROC theProc = ::GetProcAddress(theModule, "DllInstall");
1147             if (! theProc)
1148             {
1149                 // not found, must be 4.70
1150                 version = 470;
1151             }
1152             else
1153             {                         // found, must be 4.71
1154                 version = 471;
1155             }
1156         }
1157     }
1158     return version;
1159 }
1160
1161 void wxExit()
1162 {
1163     wxLogError(_("Fatal error: exiting"));
1164
1165     wxApp::CleanUp();
1166 }
1167
1168 // Yield to incoming messages
1169 bool wxYield()
1170 {
1171     MSG msg;
1172     // We want to go back to the main message loop
1173     // if we see a WM_QUIT. (?)
1174 #ifdef __WXWINE__
1175     while (PeekMessage(&msg, (HWND)NULL, 0, 0, PM_NOREMOVE) && msg.message != WM_QUIT)
1176 #else
1177     while (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) && msg.message != WM_QUIT)
1178 #endif
1179     {
1180         if ( !wxTheApp->DoMessage() )
1181             break;
1182     }
1183     // If they are pending events, we must process them.
1184 #if wxUSE_THREADS
1185     wxTheApp->ProcessPendingEvents();
1186 #endif
1187
1188     return TRUE;
1189 }
1190
1191 wxIcon
1192 wxApp::GetStdIcon(int which) const
1193 {
1194     switch(which)
1195     {
1196         case wxICON_INFORMATION:
1197             return wxIcon("wxICON_INFO");
1198
1199         case wxICON_QUESTION:
1200             return wxIcon("wxICON_QUESTION");
1201
1202         case wxICON_EXCLAMATION:
1203             return wxIcon("wxICON_WARNING");
1204
1205         default:
1206             wxFAIL_MSG(wxT("requested non existent standard icon"));
1207             // still fall through
1208
1209         case wxICON_HAND:
1210             return wxIcon("wxICON_ERROR");
1211     }
1212 }
1213
1214
1215 HINSTANCE wxGetInstance()
1216 {
1217     return wxhInstance;
1218 }
1219
1220 void wxSetInstance(HINSTANCE hInst)
1221 {
1222     wxhInstance = hInst;
1223 }
1224
1225 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1226 // if in a separate file. So include it here to ensure it's linked.
1227 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
1228 #include "main.cpp"
1229 #endif