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     #include "wx/icon.h"
  48 #endif
  49
  50 #include "wx/log.h"
  51 #include "wx/module.h"
  52
  53 #include "wx/msw/private.h"
  54
  55 #if wxUSE_THREADS
  56     #include "wx/thread.h"
  57
  58     // define the array of MSG strutures
  59     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
  60
  61     #include "wx/arrimpl.cpp"
  62
  63     WX_DEFINE_OBJARRAY(wxMsgArray);
  64 #endif // wxUSE_THREADS
  65
  66 #if wxUSE_WX_RESOURCES
  67     #include "wx/resource.h"
  68 #endif
  69
  70 #if wxUSE_TOOLTIPS
  71     #include "wx/tooltip.h"
  72 #endif // wxUSE_TOOLTIPS
  73
  74 // OLE is used for drag-and-drop, clipboard, OLE Automation..., but some
  75 // compilers don't support it (missing headers, libs, ...)
  76 #if defined(__GNUWIN32_OLD__) || defined(__SC__) || defined(__SALFORDC__)
  77     #undef wxUSE_OLE
  78
  79     #define  wxUSE_OLE 0
  80 #endif // broken compilers
  81
  82 #if wxUSE_OLE
  83     #include <ole2.h>
  84 #endif
  85
  86 #include <string.h>
  87 #include <ctype.h>
  88
  89 #if defined(__WIN95__) && !(defined(__GNUWIN32_OLD__) || defined(__TWIN32__))
  90     #include <commctrl.h>
  91 #endif
  92
  93 #include "wx/msw/msvcrt.h"
  94
  95 // ----------------------------------------------------------------------------
  96 // conditional compilation
  97 // ----------------------------------------------------------------------------
  98
  99 // The macro _WIN32_IE is defined by commctrl.h (unless it had already been
 100 // defined before) and shows us what common control features are available
 101 // during the compile time (it doesn't mean that they will be available during
 102 // the run-time, use GetComCtl32Version() to test for them!). The possible
 103 // values are:
 104 //
 105 // 0x0200     for comctl32.dll 4.00 shipped with Win95/NT 4.0
 106 // 0x0300                      4.70              IE 3.x
 107 // 0x0400                      4.71              IE 4.0
 108 // 0x0401                      4.72              IE 4.01 and Win98
 109 // 0x0500                      5.00              IE 5.x and NT 5.0 (Win2000)
 110
 111 #ifndef _WIN32_IE
 112     // minimal set of features by default
 113     #define _WIN32_IE 0x0200
 114 #endif
 115
 116 #if _WIN32_IE >= 0x0300
 117     #include <shlwapi.h>
 118 #endif
 119
 120 // ---------------------------------------------------------------------------
 121 // global variables
 122 // ---------------------------------------------------------------------------
 123
 124 extern wxChar *wxBuffer;
 125 extern wxChar *wxOsVersion;
 126 extern wxList *wxWinHandleList;
 127 extern wxList WXDLLEXPORT wxPendingDelete;
 128 extern void wxSetKeyboardHook(bool doIt);
 129
 130 MSG s_currentMsg;
 131 wxApp *wxTheApp = NULL;
 132
 133 // NB: all "NoRedraw" classes must have the same names as the "normal" classes
 134 //     with NR suffix - wxWindow::MSWCreate() supposes this
 135 const wxChar *wxFrameClassName         = wxT("wxFrameClass");
 136 const wxChar *wxFrameClassNameNoRedraw = wxT("wxFrameClassNR");
 137 const wxChar *wxMDIFrameClassName      = wxT("wxMDIFrameClass");
 138 const wxChar *wxMDIFrameClassNameNoRedraw = wxT("wxMDIFrameClassNR");
 139 const wxChar *wxMDIChildFrameClassName = wxT("wxMDIChildFrameClass");
 140 const wxChar *wxMDIChildFrameClassNameNoRedraw = wxT("wxMDIChildFrameClassNR");
 141 const wxChar *wxPanelClassName         = wxT("wxPanelClass");
 142 const wxChar *wxCanvasClassName        = wxT("wxCanvasClass");
 143
 144 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 145 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 146 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 147
 148 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 149 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 150 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 151
 152 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 153
 154 LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 155
 156 // ===========================================================================
 157 // implementation
 158 // ===========================================================================
 159
 160 // ---------------------------------------------------------------------------
 161 // wxApp
 162 // ---------------------------------------------------------------------------
 163
 164     IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 165
 166     BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 167         EVT_IDLE(wxApp::OnIdle)
 168         EVT_END_SESSION(wxApp::OnEndSession)
 169         EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 170     END_EVENT_TABLE()
 171
 172 //// Initialize
 173 bool wxApp::Initialize()
 174 {
 175     // Some people may wish to use this, but
 176     // probably it shouldn't be here by default.
 177 #ifdef __WXDEBUG__
 178     //    wxRedirectIOToConsole();
 179 #endif
 180
 181     wxBuffer = new wxChar[1500]; // FIXME
 182
 183     wxClassInfo::InitializeClasses();
 184
 185 #if wxUSE_RESOURCES
 186     wxGetResource(wxT("wxWindows"), wxT("OsVersion"), &wxOsVersion);
 187 #endif
 188
 189 #if wxUSE_THREADS
 190     wxPendingEventsLocker = new wxCriticalSection;
 191 #endif
 192
 193     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 194     wxTheColourDatabase->Initialize();
 195
 196     wxInitializeStockLists();
 197     wxInitializeStockObjects();
 198
 199 #if wxUSE_WX_RESOURCES
 200     wxInitializeResourceSystem();
 201 #endif
 202
 203     wxBitmap::InitStandardHandlers();
 204
 205 #if defined(__WIN95__)
 206     InitCommonControls();
 207
 208 #endif // __WIN95__
 209
 210 #if wxUSE_OLE
 211
 212 #ifdef __WIN16__
 213     // for OLE, enlarge message queue to be as large as possible
 214     int iMsg = 96;
 215     while (!SetMessageQueue(iMsg) && (iMsg -= 8))
 216         ;
 217 #endif // Win16
 218     // we need to initialize OLE library
 219     if ( FAILED(::OleInitialize(NULL)) )
 220         wxLogError(_("Cannot initialize OLE"));
 221 #endif // wxUSE_OLE
 222
 223 #if wxUSE_CTL3D
 224     if (!Ctl3dRegister(wxhInstance))
 225         wxLogError(wxT("Cannot register CTL3D"));
 226
 227     Ctl3dAutoSubclass(wxhInstance);
 228 #endif
 229
 230     // VZ: these icons are not in wx.rc anyhow (but should they?)!
 231 #if 0
 232     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
 233     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
 234     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
 235
 236     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
 237     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
 238     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDICHILDFRAME"));
 239 #endif // 0
 240
 241     RegisterWindowClasses();
 242
 243     // Create the brush for disabling bitmap buttons
 244
 245     LOGBRUSH lb;
 246     lb.lbStyle = BS_PATTERN;
 247     lb.lbHatch = (int)LoadBitmap( wxhInstance, wxT("wxDISABLE_BUTTON_BITMAP") );
 248     if ( lb.lbHatch )
 249     {
 250         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 251         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 252     }
 253     //else: wxWindows resources are probably not linked in
 254
 255 #if wxUSE_PENWINDOWS
 256     wxRegisterPenWin();
 257 #endif
 258
 259     wxWinHandleList = new wxList(wxKEY_INTEGER);
 260
 261     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 262     // PLEASE DO NOT ALTER THIS.
 263 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 264     extern char wxDummyChar;
 265     if (wxDummyChar) wxDummyChar++;
 266 #endif
 267
 268     wxSetKeyboardHook(TRUE);
 269
 270     wxModule::RegisterModules();
 271     if (!wxModule::InitializeModules())
 272         return FALSE;
 273     return TRUE;
 274 }
 275
 276 // ---------------------------------------------------------------------------
 277 // RegisterWindowClasses
 278 // ---------------------------------------------------------------------------
 279
 280 // TODO we should only register classes really used by the app. For this it
 281 //      would be enough to just delay the class registration until an attempt
 282 //      to create a window of this class is made.
 283 bool wxApp::RegisterWindowClasses()
 284 {
 285     WNDCLASS wndclass;
 286
 287     // for each class we register one with CS_(V|H)REDRAW style and one
 288     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 289     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 290     static const long styleNoRedraw = CS_DBLCLKS;
 291
 292     // the fields which are common to all classes
 293     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 294     wndclass.cbClsExtra    = 0;
 295     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 296     wndclass.hInstance     = wxhInstance;
 297     wndclass.hIcon         = (HICON) NULL;
 298     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 299     wndclass.lpszMenuName  = NULL;
 300
 301     // Register the frame window class.
 302     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 303     wndclass.lpszClassName = wxFrameClassName;
 304     wndclass.style         = styleNormal;
 305
 306     if ( !RegisterClass(&wndclass) )
 307     {
 308         wxLogLastError("RegisterClass(frame)");
 309
 310         return FALSE;
 311     }
 312
 313     // "no redraw" frame
 314     wndclass.lpszClassName = wxFrameClassNameNoRedraw;
 315     wndclass.style         = styleNoRedraw;
 316
 317     if ( !RegisterClass(&wndclass) )
 318     {
 319         wxLogLastError("RegisterClass(no redraw frame)");
 320
 321         return FALSE;
 322     }
 323
 324     // Register the MDI frame window class.
 325     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 326     wndclass.lpszClassName = wxMDIFrameClassName;
 327     wndclass.style         = styleNormal;
 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 = wxMDIFrameClassNameNoRedraw;
 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     wndclass.style         = styleNormal;
 351
 352     if ( !RegisterClass(&wndclass) )
 353     {
 354         wxLogLastError("RegisterClass(MDI child)");
 355
 356         return FALSE;
 357     }
 358
 359     // "no redraw" MDI child frame
 360     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 361     wndclass.style         = styleNoRedraw;
 362
 363     if ( !RegisterClass(&wndclass) )
 364     {
 365         wxLogLastError("RegisterClass(no redraw MDI child)");
 366
 367         return FALSE;
 368     }
 369
 370     // Register the panel window class.
 371     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 372     wndclass.lpszClassName = wxPanelClassName;
 373     wndclass.style         = styleNormal;
 374
 375     if ( !RegisterClass(&wndclass) )
 376     {
 377         wxLogLastError("RegisterClass(panel)");
 378
 379         return FALSE;
 380     }
 381
 382     // Register the canvas and textsubwindow class name
 383     wndclass.hbrBackground = (HBRUSH)NULL;
 384     wndclass.lpszClassName = wxCanvasClassName;
 385
 386     if ( !RegisterClass(&wndclass) )
 387     {
 388         wxLogLastError("RegisterClass(canvas)");
 389
 390         return FALSE;
 391     }
 392
 393     return TRUE;
 394 }
 395
 396 // ---------------------------------------------------------------------------
 397 // Convert Windows to argc, argv style
 398 // ---------------------------------------------------------------------------
 399
 400 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 401 {
 402     wxStringList args;
 403
 404     wxString cmdLine(lpCmdLine);
 405     int count = 0;
 406
 407     // Get application name
 408     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 409     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 410
 411     args.Add(name);
 412     count++;
 413
 414     wxStrcpy(name, wxFileNameFromPath(name));
 415     wxStripExtension(name);
 416     wxTheApp->SetAppName(name);
 417
 418     // Break up string
 419     // Treat strings enclosed in double-quotes as single arguments
 420     int i = 0;
 421     int len = cmdLine.Length();
 422     while (i < len)
 423     {
 424         // Skip whitespace
 425         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 426             i ++;
 427
 428         if (i < len)
 429         {
 430             if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
 431             {
 432                 i ++;
 433                 int first = i;
 434                 while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
 435                     i ++;
 436
 437                 wxString arg(cmdLine.Mid(first, (i - first)));
 438
 439                 args.Add(arg);
 440                 count ++;
 441
 442                 if (i < len)
 443                     i ++; // Skip past 2nd quote
 444             }
 445             else // Unquoted argument
 446             {
 447                 int first = i;
 448                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 449                     i ++;
 450
 451                 wxString arg(cmdLine.Mid(first, (i - first)));
 452
 453                 args.Add(arg);
 454                 count ++;
 455             }
 456         }
 457     }
 458
 459     wxTheApp->argv = new wxChar*[count + 1];
 460     for (i = 0; i < count; i++)
 461     {
 462         wxString arg(args[i]);
 463         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 464     }
 465     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 466     wxTheApp->argc = count;
 467 }
 468
 469 //// Cleans up any wxWindows internal structures left lying around
 470
 471 void wxApp::CleanUp()
 472 {
 473     //// COMMON CLEANUP
 474
 475 #if wxUSE_LOG
 476     // flush the logged messages if any and install a 'safer' log target: the
 477     // default one (wxLogGui) can't be used after the resources are freed just
 478     // below and the user suppliedo ne might be even more unsafe (using any
 479     // wxWindows GUI function is unsafe starting from now)
 480     wxLog::DontCreateOnDemand();
 481
 482     // this will flush the old messages if any
 483     delete wxLog::SetActiveTarget(new wxLogStderr);
 484 #endif // wxUSE_LOG
 485
 486     // One last chance for pending objects to be cleaned up
 487     wxTheApp->DeletePendingObjects();
 488
 489     wxModule::CleanUpModules();
 490
 491 #if wxUSE_WX_RESOURCES
 492     wxCleanUpResourceSystem();
 493
 494     //  wxDefaultResourceTable->ClearTable();
 495 #endif
 496
 497     wxDeleteStockObjects();
 498
 499     // Destroy all GDI lists, etc.
 500     wxDeleteStockLists();
 501
 502     delete wxTheColourDatabase;
 503     wxTheColourDatabase = NULL;
 504
 505     wxBitmap::CleanUpHandlers();
 506
 507     delete[] wxBuffer;
 508     wxBuffer = NULL;
 509
 510     //// WINDOWS-SPECIFIC CLEANUP
 511
 512     wxSetKeyboardHook(FALSE);
 513
 514 #if wxUSE_PENWINDOWS
 515     wxCleanUpPenWin();
 516 #endif
 517
 518     if (wxSTD_FRAME_ICON)
 519         DestroyIcon(wxSTD_FRAME_ICON);
 520     if (wxSTD_MDICHILDFRAME_ICON)
 521         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 522     if (wxSTD_MDIPARENTFRAME_ICON)
 523         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 524
 525     if (wxDEFAULT_FRAME_ICON)
 526         DestroyIcon(wxDEFAULT_FRAME_ICON);
 527     if (wxDEFAULT_MDICHILDFRAME_ICON)
 528         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 529     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 530         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 531
 532     if ( wxDisableButtonBrush )
 533         ::DeleteObject( wxDisableButtonBrush );
 534
 535 #if wxUSE_OLE
 536     ::OleUninitialize();
 537 #endif
 538
 539 #if wxUSE_CTL3D
 540     Ctl3dUnregister(wxhInstance);
 541 #endif
 542
 543     if (wxWinHandleList)
 544         delete wxWinHandleList;
 545
 546     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 547     // create a module for that as it's part of the core.
 548     delete wxPendingEvents;
 549 #if wxUSE_THREADS
 550     delete wxPendingEventsLocker;
 551     // If we don't do the following, we get an apparent memory leak.
 552     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 553 #endif
 554
 555     wxClassInfo::CleanUpClasses();
 556
 557     delete wxTheApp;
 558     wxTheApp = NULL;
 559
 560 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 561     // At this point we want to check if there are any memory
 562     // blocks that aren't part of the wxDebugContext itself,
 563     // as a special case. Then when dumping we need to ignore
 564     // wxDebugContext, too.
 565     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 566     {
 567         wxLogMessage(wxT("There were memory leaks."));
 568         wxDebugContext::Dump();
 569         wxDebugContext::PrintStatistics();
 570     }
 571     //  wxDebugContext::SetStream(NULL, NULL);
 572 #endif
 573
 574 #if wxUSE_LOG
 575     // do it as the very last thing because everything else can log messages
 576     delete wxLog::SetActiveTarget(NULL);
 577 #endif // wxUSE_LOG
 578 }
 579
 580 //----------------------------------------------------------------------
 581 // Entry point helpers, used by wxPython
 582 //----------------------------------------------------------------------
 583
 584 int  WXDLLEXPORT wxEntryStart( int WXUNUSED(argc), char** WXUNUSED(argv) )
 585 {
 586     return wxApp::Initialize();
 587 }
 588
 589 int  WXDLLEXPORT wxEntryInitGui()
 590 {
 591     wxTheApp->OnInitGui();
 592     return 0;
 593 }
 594
 595 void WXDLLEXPORT wxEntryCleanup()
 596 {
 597     wxApp::CleanUp();
 598 }
 599
 600
 601 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 602
 603 // temporarily disable this warning which would be generated in release builds
 604 // because of __try
 605 #ifdef __VISUALC__
 606     #pragma warning(disable: 4715) // not all control paths return a value
 607 #endif // Visual C++
 608
 609 //----------------------------------------------------------------------
 610 // Main wxWindows entry point
 611 //----------------------------------------------------------------------
 612 int wxEntry(WXHINSTANCE hInstance,
 613             WXHINSTANCE WXUNUSED(hPrevInstance),
 614             char *lpCmdLine,
 615             int nCmdShow,
 616             bool enterLoop)
 617 {
 618     // do check for memory leaks on program exit
 619     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 620     //  deallocated memory which may be used to simulate low-memory condition)
 621     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 622 #ifdef __MWERKS__
 623 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 624     // This seems to be necessary since there are 'rogue'
 625     // objects present at this point (perhaps global objects?)
 626     // Setting a checkpoint will ignore them as far as the
 627     // memory checking facility is concerned.
 628     // Of course you may argue that memory allocated in globals should be
 629     // checked, but this is a reasonable compromise.
 630     wxDebugContext::SetCheckpoint();
 631 #endif
 632 #endif
 633     // take everything into a try-except block in release build
 634     // FIXME other compilers must support Win32 SEH (structured exception
 635     //       handling) too, just find the appropriate keyword in their docs!
 636     //       Please note that it's _not_ the same as C++ exceptions!
 637 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 638     #define CATCH_PROGRAM_EXCEPTIONS
 639
 640     __try {
 641 #else
 642     #undef  CATCH_PROGRAM_EXCEPTIONS
 643 #endif
 644         wxhInstance = (HINSTANCE) hInstance;
 645
 646         if (!wxEntryStart(0,0))
 647             return 0;
 648
 649         // create the application object or ensure that one already exists
 650         if (!wxTheApp)
 651         {
 652             // The app may have declared a global application object, but we recommend
 653             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 654             // function for delayed, dynamic app object construction.
 655             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 656                          wxT("No initializer - use IMPLEMENT_APP macro.") );
 657
 658             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 659         }
 660
 661         wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
 662
 663         // save the WinMain() parameters
 664         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 665         wxTheApp->m_nCmdShow = nCmdShow;
 666
 667         // GUI-specific initialisation. In fact on Windows we don't have any,
 668         // but this call is provided for compatibility across platforms.
 669         wxEntryInitGui();
 670
 671         // We really don't want timestamps by default, because it means
 672         // we can't simply double-click on the error message and get to that
 673         // line in the source. So VC++ at least, let's have a sensible default.
 674 #ifdef __VISUALC__
 675         wxLog::SetTimestamp(NULL);
 676 #endif
 677
 678         int retValue = 0;
 679
 680         if ( wxTheApp->OnInit() )
 681         {
 682             if ( enterLoop )
 683             {
 684                 retValue = wxTheApp->OnRun();
 685             }
 686             else
 687                 // We want to initialize, but not run or exit immediately.
 688                 return 1;
 689         }
 690         //else: app initialization failed, so we skipped OnRun()
 691
 692         wxWindow *topWindow = wxTheApp->GetTopWindow();
 693         if ( topWindow )
 694         {
 695             // Forcibly delete the window.
 696             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 697                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 698             {
 699                 topWindow->Close(TRUE);
 700                 wxTheApp->DeletePendingObjects();
 701             }
 702             else
 703             {
 704                 delete topWindow;
 705                 wxTheApp->SetTopWindow(NULL);
 706             }
 707         }
 708
 709         wxTheApp->OnExit();
 710
 711         wxEntryCleanup();
 712
 713         return retValue;
 714
 715 #ifdef CATCH_PROGRAM_EXCEPTIONS
 716     }
 717     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 718         /*
 719            if ( wxTheApp )
 720            wxTheApp->OnFatalException();
 721          */
 722
 723         // using wxLog would be unsafe here
 724         ::MessageBox(NULL,
 725                      _("Unrecoverable program error detected: "
 726                      " the application will terminate."),
 727                      _("Fatal Error"),
 728                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 729
 730         ::ExitProcess(3); // the same exit code as abort()
 731
 732         // NOTREACHED
 733     }
 734 #endif // CATCH_PROGRAM_EXCEPTIONS
 735 }
 736
 737 // restore warning state
 738 #ifdef __VISUALC__
 739     #pragma warning(default: 4715) // not all control paths return a value
 740 #endif // Visual C++
 741
 742 #else /*  _WINDLL  */
 743
 744 //----------------------------------------------------------------------
 745 // Entry point for wxWindows + the App in a DLL
 746 //----------------------------------------------------------------------
 747
 748 int wxEntry(WXHINSTANCE hInstance)
 749 {
 750     wxhInstance = (HINSTANCE) hInstance;
 751     wxEntryStart(0, 0);
 752
 753     // The app may have declared a global application object, but we recommend
 754     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 755     // for delayed, dynamic app object construction.
 756     if (!wxTheApp)
 757     {
 758         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 759                      "No initializer - use IMPLEMENT_APP macro." );
 760
 761         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 762     }
 763
 764     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 765
 766     wxTheApp->argc = 0;
 767     wxTheApp->argv = NULL;
 768
 769     wxEntryInitGui();
 770
 771     wxTheApp->OnInit();
 772
 773     wxWindow *topWindow = wxTheApp->GetTopWindow();
 774     if ( topWindow && topWindow->GetHWND())
 775     {
 776         topWindow->Show(TRUE);
 777     }
 778
 779     return 1;
 780 }
 781 #endif // _WINDLL
 782
 783 //// Static member initialization
 784
 785 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 786
 787 wxApp::wxApp()
 788 {
 789     m_topWindow = NULL;
 790     wxTheApp = this;
 791     m_wantDebugOutput = TRUE;
 792
 793     argc = 0;
 794     argv = NULL;
 795     m_printMode = wxPRINT_WINDOWS;
 796     m_exitOnFrameDelete = TRUE;
 797     m_auto3D = TRUE;
 798 }
 799
 800 wxApp::~wxApp()
 801 {
 802     // Delete command-line args
 803     int i;
 804     for (i = 0; i < argc; i++)
 805     {
 806         delete[] argv[i];
 807     }
 808     delete[] argv;
 809 }
 810
 811 bool wxApp::Initialized()
 812 {
 813 #ifndef _WINDLL
 814     if (GetTopWindow())
 815         return TRUE;
 816     else
 817         return FALSE;
 818 #endif
 819 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 820     return TRUE;
 821 #endif
 822 }
 823
 824 /*
 825  * Get and process a message, returning FALSE if WM_QUIT
 826  * received (and also set the flag telling the app to exit the main loop)
 827  *
 828  */
 829 bool wxApp::DoMessage()
 830 {
 831     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 832     if ( rc == 0 )
 833     {
 834         // got WM_QUIT
 835         m_keepGoing = FALSE;
 836
 837         return FALSE;
 838     }
 839     else if ( rc == -1 )
 840     {
 841         // should never happen, but let's test for it nevertheless
 842         wxLogLastError("GetMessage");
 843     }
 844     else
 845     {
 846 #if wxUSE_THREADS
 847         wxASSERT_MSG( wxThread::IsMain(),
 848                       wxT("only the main thread can process Windows messages") );
 849
 850         static bool s_hadGuiLock = TRUE;
 851         static wxMsgArray s_aSavedMessages;
 852
 853         // if a secondary thread owns is doing GUI calls, save all messages for
 854         // later processing - we can't process them right now because it will
 855         // lead to recursive library calls (and we're not reentrant)
 856         if ( !wxGuiOwnedByMainThread() )
 857         {
 858             s_hadGuiLock = FALSE;
 859
 860             // leave out WM_COMMAND messages: too dangerous, sometimes
 861             // the message will be processed twice
 862             if ( !wxIsWaitingForThread() ||
 863                     s_currentMsg.message != WM_COMMAND )
 864             {
 865                 s_aSavedMessages.Add(s_currentMsg);
 866             }
 867
 868             return TRUE;
 869         }
 870         else
 871         {
 872             // have we just regained the GUI lock? if so, post all of the saved
 873             // messages
 874             //
 875             // FIXME of course, it's not _exactly_ the same as processing the
 876             //       messages normally - expect some things to break...
 877             if ( !s_hadGuiLock )
 878             {
 879                 s_hadGuiLock = TRUE;
 880
 881                 size_t count = s_aSavedMessages.Count();
 882                 for ( size_t n = 0; n < count; n++ )
 883                 {
 884                     MSG& msg = s_aSavedMessages[n];
 885
 886                     if ( !ProcessMessage((WXMSG *)&msg) )
 887                     {
 888                         ::TranslateMessage(&msg);
 889                         ::DispatchMessage(&msg);
 890                     }
 891                 }
 892
 893                 s_aSavedMessages.Empty();
 894             }
 895         }
 896 #endif // wxUSE_THREADS
 897
 898         // Process the message
 899         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 900         {
 901             ::TranslateMessage(&s_currentMsg);
 902             ::DispatchMessage(&s_currentMsg);
 903         }
 904     }
 905
 906     return TRUE;
 907 }
 908
 909 /*
 910  * Keep trying to process messages until WM_QUIT
 911  * received.
 912  *
 913  * If there are messages to be processed, they will all be
 914  * processed and OnIdle will not be called.
 915  * When there are no more messages, OnIdle is called.
 916  * If OnIdle requests more time,
 917  * it will be repeatedly called so long as there are no pending messages.
 918  * A 'feature' of this is that once OnIdle has decided that no more processing
 919  * is required, then it won't get processing time until further messages
 920  * are processed (it'll sit in DoMessage).
 921  */
 922
 923 int wxApp::MainLoop()
 924 {
 925     m_keepGoing = TRUE;
 926
 927     while ( m_keepGoing )
 928     {
 929 #if wxUSE_THREADS
 930         wxMutexGuiLeaveOrEnter();
 931 #endif // wxUSE_THREADS
 932
 933         while ( !Pending() && ProcessIdle() )
 934             ;
 935
 936         // a message came or no more idle processing to do
 937         DoMessage();
 938     }
 939
 940     return s_currentMsg.wParam;
 941 }
 942
 943 // Returns TRUE if more time is needed.
 944 bool wxApp::ProcessIdle()
 945 {
 946     wxIdleEvent event;
 947     event.SetEventObject(this);
 948     ProcessEvent(event);
 949
 950     return event.MoreRequested();
 951 }
 952
 953 void wxApp::ExitMainLoop()
 954 {
 955     // VZ: why not ::PostQuitMessage()?
 956     m_keepGoing = FALSE;
 957 }
 958
 959 bool wxApp::Pending()
 960 {
 961     return ::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0;
 962 }
 963
 964 void wxApp::Dispatch()
 965 {
 966     DoMessage();
 967 }
 968
 969 /*
 970  * Give all windows a chance to preprocess
 971  * the message. Some may have accelerator tables, or have
 972  * MDI complications.
 973  */
 974
 975 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 976 {
 977     MSG *msg = (MSG *)wxmsg;
 978     HWND hWnd = msg->hwnd;
 979     wxWindow *wndThis = wxGetWindowFromHWND((WXHWND)hWnd);
 980
 981 #if wxUSE_TOOLTIPS
 982     // we must relay WM_MOUSEMOVE events to the tooltip ctrl if we want it to
 983     // popup the tooltip bubbles
 984     if ( wndThis && (msg->message == WM_MOUSEMOVE) )
 985     {
 986         wxToolTip *tt = wndThis->GetToolTip();
 987         if ( tt )
 988         {
 989             tt->RelayEvent(wxmsg);
 990         }
 991     }
 992 #endif // wxUSE_TOOLTIPS
 993
 994     // Try translations first; find the youngest window with
 995     // a translation table.
 996     wxWindow *wnd;
 997     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 998     {
 999         if ( wnd->MSWTranslateMessage(wxmsg) )
1000             return TRUE;
1001     }
1002
1003     // Anyone for a non-translation message? Try youngest descendants first.
1004     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
1005     {
1006         if ( wnd->MSWProcessMessage(wxmsg) )
1007             return TRUE;
1008     }
1009
1010     return FALSE;
1011 }
1012
1013 void wxApp::OnIdle(wxIdleEvent& event)
1014 {
1015     static bool s_inOnIdle = FALSE;
1016
1017     // Avoid recursion (via ProcessEvent default case)
1018     if ( s_inOnIdle )
1019         return;
1020
1021     s_inOnIdle = TRUE;
1022
1023     // If there are pending events, we must process them: pending events
1024     // are either events to the threads other than main or events posted
1025     // with wxPostEvent() functions
1026     // GRG: I have moved this here so that all pending events are processed
1027     //   before starting to delete any objects. This behaves better (in
1028     //   particular, wrt wxPostEvent) and is coherent with wxGTK's current
1029     //   behaviour. Changed Feb/2000 before 2.1.14
1030     ProcessPendingEvents();
1031
1032     // 'Garbage' collection of windows deleted with Close().
1033     DeletePendingObjects();
1034
1035 #if wxUSE_LOG
1036     // flush the logged messages if any
1037     wxLog::FlushActive();
1038 #endif // wxUSE_LOG
1039
1040     // Send OnIdle events to all windows
1041     if ( SendIdleEvents() )
1042     {
1043         // SendIdleEvents() returns TRUE if at least one window requested more
1044         // idle events
1045         event.RequestMore(TRUE);
1046     }
1047
1048     s_inOnIdle = FALSE;
1049 }
1050
1051 // Send idle event to all top-level windows
1052 bool wxApp::SendIdleEvents()
1053 {
1054     bool needMore = FALSE;
1055
1056     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1057     while (node)
1058     {
1059         wxWindow* win = node->GetData();
1060         if (SendIdleEvents(win))
1061             needMore = TRUE;
1062         node = node->GetNext();
1063     }
1064
1065     return needMore;
1066 }
1067
1068 // Send idle event to window and all subwindows
1069 bool wxApp::SendIdleEvents(wxWindow* win)
1070 {
1071     bool needMore = FALSE;
1072
1073     wxIdleEvent event;
1074     event.SetEventObject(win);
1075     win->GetEventHandler()->ProcessEvent(event);
1076
1077     if (event.MoreRequested())
1078         needMore = TRUE;
1079
1080     wxNode* node = win->GetChildren().First();
1081     while (node)
1082     {
1083         wxWindow* win = (wxWindow*) node->Data();
1084         if (SendIdleEvents(win))
1085             needMore = TRUE;
1086
1087         node = node->Next();
1088     }
1089     return needMore;
1090 }
1091
1092 void wxApp::DeletePendingObjects()
1093 {
1094     wxNode *node = wxPendingDelete.First();
1095     while (node)
1096     {
1097         wxObject *obj = (wxObject *)node->Data();
1098
1099         delete obj;
1100
1101         if (wxPendingDelete.Member(obj))
1102             delete node;
1103
1104         // Deleting one object may have deleted other pending
1105         // objects, so start from beginning of list again.
1106         node = wxPendingDelete.First();
1107     }
1108 }
1109
1110 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1111 {
1112     if (GetTopWindow())
1113         GetTopWindow()->Close(TRUE);
1114 }
1115
1116 // Default behaviour: close the application with prompts. The
1117 // user can veto the close, and therefore the end session.
1118 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1119 {
1120     if (GetTopWindow())
1121     {
1122         if (!GetTopWindow()->Close(!event.CanVeto()))
1123             event.Veto(TRUE);
1124     }
1125 }
1126
1127 /* static */
1128 int wxApp::GetComCtl32Version()
1129 {
1130     // cache the result
1131     static int s_verComCtl32 = -1;
1132
1133     wxCRIT_SECT_DECLARE(csComCtl32);
1134     wxCRIT_SECT_LOCKER(lock, csComCtl32);
1135
1136     if ( s_verComCtl32 == -1 )
1137     {
1138         // initally assume no comctl32.dll at all
1139         s_verComCtl32 = 0;
1140
1141         // do we have it?
1142         HMODULE hModuleComCtl32 = ::GetModuleHandle(wxT("COMCTL32"));
1143
1144         // if so, then we can check for the version
1145         if ( hModuleComCtl32 )
1146         {
1147             // try to use DllGetVersion() if available in _headers_
1148             #ifdef DLLVER_PLATFORM_WINDOWS // defined in shlwapi.h
1149                 DLLGETVERSIONPROC pfnDllGetVersion = (DLLGETVERSIONPROC)
1150                     ::GetProcAddress(hModuleComCtl32, _T("DllGetVersion"));
1151                 if ( pfnDllGetVersion )
1152                 {
1153                     DLLVERSIONINFO dvi;
1154                     dvi.cbSize = sizeof(dvi);
1155
1156                     HRESULT hr = (*pfnDllGetVersion)(&dvi);
1157                     if ( FAILED(hr) )
1158                     {
1159                         wxLogApiError(_T("DllGetVersion"), hr);
1160                     }
1161                     else
1162                     {
1163                         // this is incompatible with _WIN32_IE values, but
1164                         // compatible with the other values returned by
1165                         // GetComCtl32Version()
1166                         s_verComCtl32 = 100*dvi.dwMajorVersion +
1167                                             dvi.dwMinorVersion;
1168                     }
1169                 }
1170             #endif
1171                 // DllGetVersion() unavailable either during compile or
1172                 // run-time, try to guess the version otherwise
1173                 if ( !s_verComCtl32 )
1174                 {
1175                     // InitCommonControlsEx is unique to 4.70 and later
1176                     FARPROC theProc = ::GetProcAddress
1177                                         (
1178                                          hModuleComCtl32,
1179 #if defined(__BORLANDC__) && (__BORLANDC__ <= 0x520)
1180                                          "InitCommonControlsEx"
1181 #else
1182                                          _T("InitCommonControlsEx")
1183 #endif
1184                                         );
1185
1186                     if ( !theProc )
1187                     {
1188                         // not found, must be 4.00
1189                         s_verComCtl32 = 400;
1190                     }
1191                     else
1192                     {
1193                         // many symbols appeared in comctl32 4.71, could use
1194                         // any of them except may be DllInstall
1195                         theProc = ::GetProcAddress
1196                                     (
1197                                      hModuleComCtl32,
1198 #if defined(__BORLANDC__) && (__BORLANDC__ <= 0x520)
1199                                      "InitializeFlatSB"
1200 #else
1201                                      _T("InitializeFlatSB")
1202 #endif
1203                                     );
1204                         if ( !theProc )
1205                         {
1206                             // not found, must be 4.70
1207                             s_verComCtl32 = 470;
1208                         }
1209                         else
1210                         {
1211                             // found, must be 4.71
1212                             s_verComCtl32 = 471;
1213                         }
1214                     }
1215                 }
1216         }
1217     }
1218
1219     return s_verComCtl32;
1220 }
1221
1222 void wxExit()
1223 {
1224     wxLogError(_("Fatal error: exiting"));
1225
1226     wxApp::CleanUp();
1227     exit(0);
1228 }
1229
1230 // Yield to incoming messages
1231 bool wxYield()
1232 {
1233     // disable log flushing from here because a call to wxYield() shouldn't
1234     // normally result in message boxes popping up &c
1235     wxLog::Suspend();
1236
1237     // we don't want to process WM_QUIT from here - it should be processed in
1238     // the main event loop in order to stop it
1239     MSG msg;
1240     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
1241             msg.message != WM_QUIT )
1242     {
1243 #if wxUSE_THREADS
1244         wxMutexGuiLeaveOrEnter();
1245 #endif // wxUSE_THREADS
1246
1247         if ( !wxTheApp->DoMessage() )
1248             break;
1249     }
1250
1251     // If they are pending events, we must process them.
1252     if (wxTheApp)
1253         wxTheApp->ProcessPendingEvents();
1254
1255     // let the logs be flashed again
1256     wxLog::Resume();
1257
1258     return TRUE;
1259 }
1260
1261 //-----------------------------------------------------------------------------
1262 // wxWakeUpIdle
1263 //-----------------------------------------------------------------------------
1264
1265 void wxWakeUpIdle()
1266 {
1267     // Send the top window a dummy message so idle handler processing will
1268     // start up again.  Doing it this way ensures that the idle handler
1269     // wakes up in the right thread (see also wxWakeUpMainThread() which does
1270     // the same for the main app thread only)
1271     wxWindow *topWindow = wxTheApp->GetTopWindow();
1272     if ( topWindow )
1273     {
1274         if ( !::PostMessage(GetHwndOf(topWindow), WM_NULL, 0, 0) )
1275         {
1276             // should never happen
1277             wxLogLastError("PostMessage(WM_NULL)");
1278         }
1279     }
1280 }
1281
1282 //-----------------------------------------------------------------------------
1283
1284 wxIcon
1285 wxApp::GetStdIcon(int which) const
1286 {
1287     switch(which)
1288     {
1289         case wxICON_INFORMATION:
1290             return wxIcon("wxICON_INFO");
1291
1292         case wxICON_QUESTION:
1293             return wxIcon("wxICON_QUESTION");
1294
1295         case wxICON_EXCLAMATION:
1296             return wxIcon("wxICON_WARNING");
1297
1298         default:
1299             wxFAIL_MSG(wxT("requested non existent standard icon"));
1300             // still fall through
1301
1302         case wxICON_HAND:
1303             return wxIcon("wxICON_ERROR");
1304     }
1305 }
1306
1307 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1308 // if in a separate file. So include it here to ensure it's linked.
1309 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__) && !defined(WXMAKINGDLL))
1310 #include "main.cpp"
1311 #endif