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 *wxPanelClassNameNR       = wxT("wxPanelClassNR");
 143 const wxChar *wxCanvasClassName        = wxT("wxCanvasClass");
 144 const wxChar *wxCanvasClassNameNR      = wxT("wxCanvasClassNR");
 145
 146 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 147 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 148 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 149
 150 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 151 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 152 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 153
 154 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 155
 156 LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 157
 158 // ===========================================================================
 159 // implementation
 160 // ===========================================================================
 161
 162 // ---------------------------------------------------------------------------
 163 // wxApp
 164 // ---------------------------------------------------------------------------
 165
 166     IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 167
 168     BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 169         EVT_IDLE(wxApp::OnIdle)
 170         EVT_END_SESSION(wxApp::OnEndSession)
 171         EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 172     END_EVENT_TABLE()
 173
 174 //// Initialize
 175 bool wxApp::Initialize()
 176 {
 177     // Some people may wish to use this, but
 178     // probably it shouldn't be here by default.
 179 #ifdef __WXDEBUG__
 180     //    wxRedirectIOToConsole();
 181 #endif
 182
 183     wxBuffer = new wxChar[1500]; // FIXME
 184
 185     wxClassInfo::InitializeClasses();
 186
 187 #if wxUSE_RESOURCES
 188     wxGetResource(wxT("wxWindows"), wxT("OsVersion"), &wxOsVersion);
 189 #endif
 190
 191 #if wxUSE_THREADS
 192     wxPendingEventsLocker = new wxCriticalSection;
 193 #endif
 194
 195     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 196     wxTheColourDatabase->Initialize();
 197
 198     wxInitializeStockLists();
 199     wxInitializeStockObjects();
 200
 201 #if wxUSE_WX_RESOURCES
 202     wxInitializeResourceSystem();
 203 #endif
 204
 205     wxBitmap::InitStandardHandlers();
 206
 207 #if defined(__WIN95__)
 208     InitCommonControls();
 209
 210 #endif // __WIN95__
 211
 212 #if wxUSE_OLE
 213
 214 #ifdef __WIN16__
 215     // for OLE, enlarge message queue to be as large as possible
 216     int iMsg = 96;
 217     while (!SetMessageQueue(iMsg) && (iMsg -= 8))
 218         ;
 219 #endif // Win16
 220     // we need to initialize OLE library
 221     if ( FAILED(::OleInitialize(NULL)) )
 222         wxLogError(_("Cannot initialize OLE"));
 223 #endif // wxUSE_OLE
 224
 225 #if wxUSE_CTL3D
 226     if (!Ctl3dRegister(wxhInstance))
 227         wxLogError(wxT("Cannot register CTL3D"));
 228
 229     Ctl3dAutoSubclass(wxhInstance);
 230 #endif
 231
 232     // VZ: these icons are not in wx.rc anyhow (but should they?)!
 233 #if 0
 234     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
 235     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
 236     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
 237
 238     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
 239     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
 240     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDICHILDFRAME"));
 241 #endif // 0
 242
 243     RegisterWindowClasses();
 244
 245     // Create the brush for disabling bitmap buttons
 246
 247     LOGBRUSH lb;
 248     lb.lbStyle = BS_PATTERN;
 249     lb.lbHatch = (int)LoadBitmap( wxhInstance, wxT("wxDISABLE_BUTTON_BITMAP") );
 250     if ( lb.lbHatch )
 251     {
 252         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 253         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 254     }
 255     //else: wxWindows resources are probably not linked in
 256
 257 #if wxUSE_PENWINDOWS
 258     wxRegisterPenWin();
 259 #endif
 260
 261     wxWinHandleList = new wxList(wxKEY_INTEGER);
 262
 263     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 264     // PLEASE DO NOT ALTER THIS.
 265 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 266     extern char wxDummyChar;
 267     if (wxDummyChar) wxDummyChar++;
 268 #endif
 269
 270     wxSetKeyboardHook(TRUE);
 271
 272     wxModule::RegisterModules();
 273     if (!wxModule::InitializeModules())
 274         return FALSE;
 275     return TRUE;
 276 }
 277
 278 // ---------------------------------------------------------------------------
 279 // RegisterWindowClasses
 280 // ---------------------------------------------------------------------------
 281
 282 // TODO we should only register classes really used by the app. For this it
 283 //      would be enough to just delay the class registration until an attempt
 284 //      to create a window of this class is made.
 285 bool wxApp::RegisterWindowClasses()
 286 {
 287     WNDCLASS wndclass;
 288
 289     // for each class we register one with CS_(V|H)REDRAW style and one
 290     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 291     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 292     static const long styleNoRedraw = CS_DBLCLKS;
 293
 294     // the fields which are common to all classes
 295     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 296     wndclass.cbClsExtra    = 0;
 297     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 298     wndclass.hInstance     = wxhInstance;
 299     wndclass.hIcon         = (HICON) NULL;
 300     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 301     wndclass.lpszMenuName  = NULL;
 302
 303     // Register the frame window class.
 304     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 305     wndclass.lpszClassName = wxFrameClassName;
 306     wndclass.style         = styleNormal;
 307
 308     if ( !RegisterClass(&wndclass) )
 309     {
 310         wxLogLastError("RegisterClass(frame)");
 311
 312         return FALSE;
 313     }
 314
 315     // "no redraw" frame
 316     wndclass.lpszClassName = wxFrameClassNameNoRedraw;
 317     wndclass.style         = styleNoRedraw;
 318
 319     if ( !RegisterClass(&wndclass) )
 320     {
 321         wxLogLastError("RegisterClass(no redraw frame)");
 322
 323         return FALSE;
 324     }
 325
 326     // Register the MDI frame window class.
 327     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 328     wndclass.lpszClassName = wxMDIFrameClassName;
 329     wndclass.style         = styleNormal;
 330
 331     if ( !RegisterClass(&wndclass) )
 332     {
 333         wxLogLastError("RegisterClass(MDI parent)");
 334
 335         return FALSE;
 336     }
 337
 338     // "no redraw" MDI frame
 339     wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
 340     wndclass.style         = styleNoRedraw;
 341
 342     if ( !RegisterClass(&wndclass) )
 343     {
 344         wxLogLastError("RegisterClass(no redraw MDI parent frame)");
 345
 346         return FALSE;
 347     }
 348
 349     // Register the MDI child frame window class.
 350     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 351     wndclass.lpszClassName = wxMDIChildFrameClassName;
 352     wndclass.style         = styleNormal;
 353
 354     if ( !RegisterClass(&wndclass) )
 355     {
 356         wxLogLastError("RegisterClass(MDI child)");
 357
 358         return FALSE;
 359     }
 360
 361     // "no redraw" MDI child frame
 362     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 363     wndclass.style         = styleNoRedraw;
 364
 365     if ( !RegisterClass(&wndclass) )
 366     {
 367         wxLogLastError("RegisterClass(no redraw MDI child)");
 368
 369         return FALSE;
 370     }
 371
 372     // Register the panel window class.
 373     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 374     wndclass.lpszClassName = wxPanelClassName;
 375     wndclass.style         = styleNormal;
 376
 377     if ( !RegisterClass(&wndclass) )
 378     {
 379         wxLogLastError("RegisterClass(panel)");
 380
 381         return FALSE;
 382     }
 383
 384     // Register the no redraw panel window class.
 385     wndclass.lpszClassName = wxPanelClassNameNR;
 386     wndclass.style         = styleNoRedraw;
 387
 388     if ( !RegisterClass(&wndclass) )
 389     {
 390         wxLogLastError("RegisterClass(no redraw panel)");
 391
 392         return FALSE;
 393     }
 394
 395     // Register the canvas and textsubwindow class name
 396     wndclass.hbrBackground = (HBRUSH)NULL;
 397     wndclass.lpszClassName = wxCanvasClassName;
 398
 399     if ( !RegisterClass(&wndclass) )
 400     {
 401         wxLogLastError("RegisterClass(canvas)");
 402
 403         return FALSE;
 404     }
 405
 406     wndclass.lpszClassName = wxCanvasClassNameNR;
 407     wndclass.style         = styleNoRedraw;
 408     if ( !RegisterClass(&wndclass) )
 409     {
 410         wxLogLastError("RegisterClass(no redraw canvas)");
 411
 412         return FALSE;
 413     }
 414
 415     return TRUE;
 416 }
 417
 418 // ---------------------------------------------------------------------------
 419 // Convert Windows to argc, argv style
 420 // ---------------------------------------------------------------------------
 421
 422 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 423 {
 424     wxStringList args;
 425
 426     wxString cmdLine(lpCmdLine);
 427     int count = 0;
 428
 429     // Get application name
 430     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 431     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 432
 433     args.Add(name);
 434     count++;
 435
 436     wxStrcpy(name, wxFileNameFromPath(name));
 437     wxStripExtension(name);
 438     wxTheApp->SetAppName(name);
 439
 440     // Break up string
 441     // Treat strings enclosed in double-quotes as single arguments
 442     int i = 0;
 443     int len = cmdLine.Length();
 444     while (i < len)
 445     {
 446         // Skip whitespace
 447         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 448             i ++;
 449
 450         if (i < len)
 451         {
 452             if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
 453             {
 454                 i ++;
 455                 int first = i;
 456                 while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
 457                     i ++;
 458
 459                 wxString arg(cmdLine.Mid(first, (i - first)));
 460
 461                 args.Add(arg);
 462                 count ++;
 463
 464                 if (i < len)
 465                     i ++; // Skip past 2nd quote
 466             }
 467             else // Unquoted argument
 468             {
 469                 int first = i;
 470                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 471                     i ++;
 472
 473                 wxString arg(cmdLine.Mid(first, (i - first)));
 474
 475                 args.Add(arg);
 476                 count ++;
 477             }
 478         }
 479     }
 480
 481     wxTheApp->argv = new wxChar*[count + 1];
 482     for (i = 0; i < count; i++)
 483     {
 484         wxString arg(args[i]);
 485         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 486     }
 487     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 488     wxTheApp->argc = count;
 489 }
 490
 491 //// Cleans up any wxWindows internal structures left lying around
 492
 493 void wxApp::CleanUp()
 494 {
 495     //// COMMON CLEANUP
 496
 497 #if wxUSE_LOG
 498     // flush the logged messages if any and install a 'safer' log target: the
 499     // default one (wxLogGui) can't be used after the resources are freed just
 500     // below and the user suppliedo ne might be even more unsafe (using any
 501     // wxWindows GUI function is unsafe starting from now)
 502     wxLog::DontCreateOnDemand();
 503
 504     // this will flush the old messages if any
 505     delete wxLog::SetActiveTarget(new wxLogStderr);
 506 #endif // wxUSE_LOG
 507
 508     // One last chance for pending objects to be cleaned up
 509     wxTheApp->DeletePendingObjects();
 510
 511     wxModule::CleanUpModules();
 512
 513 #if wxUSE_WX_RESOURCES
 514     wxCleanUpResourceSystem();
 515
 516     //  wxDefaultResourceTable->ClearTable();
 517 #endif
 518
 519     wxDeleteStockObjects();
 520
 521     // Destroy all GDI lists, etc.
 522     wxDeleteStockLists();
 523
 524     delete wxTheColourDatabase;
 525     wxTheColourDatabase = NULL;
 526
 527     wxBitmap::CleanUpHandlers();
 528
 529     delete[] wxBuffer;
 530     wxBuffer = NULL;
 531
 532     //// WINDOWS-SPECIFIC CLEANUP
 533
 534     wxSetKeyboardHook(FALSE);
 535
 536 #if wxUSE_PENWINDOWS
 537     wxCleanUpPenWin();
 538 #endif
 539
 540     if (wxSTD_FRAME_ICON)
 541         DestroyIcon(wxSTD_FRAME_ICON);
 542     if (wxSTD_MDICHILDFRAME_ICON)
 543         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 544     if (wxSTD_MDIPARENTFRAME_ICON)
 545         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 546
 547     if (wxDEFAULT_FRAME_ICON)
 548         DestroyIcon(wxDEFAULT_FRAME_ICON);
 549     if (wxDEFAULT_MDICHILDFRAME_ICON)
 550         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 551     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 552         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 553
 554     if ( wxDisableButtonBrush )
 555         ::DeleteObject( wxDisableButtonBrush );
 556
 557 #if wxUSE_OLE
 558     ::OleUninitialize();
 559 #endif
 560
 561 #if wxUSE_CTL3D
 562     Ctl3dUnregister(wxhInstance);
 563 #endif
 564
 565     if (wxWinHandleList)
 566         delete wxWinHandleList;
 567
 568     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 569     // create a module for that as it's part of the core.
 570     delete wxPendingEvents;
 571 #if wxUSE_THREADS
 572     delete wxPendingEventsLocker;
 573     // If we don't do the following, we get an apparent memory leak.
 574     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 575 #endif
 576
 577     wxClassInfo::CleanUpClasses();
 578
 579     delete wxTheApp;
 580     wxTheApp = NULL;
 581
 582 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 583     // At this point we want to check if there are any memory
 584     // blocks that aren't part of the wxDebugContext itself,
 585     // as a special case. Then when dumping we need to ignore
 586     // wxDebugContext, too.
 587     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 588     {
 589         wxLogMessage(wxT("There were memory leaks."));
 590         wxDebugContext::Dump();
 591         wxDebugContext::PrintStatistics();
 592     }
 593     //  wxDebugContext::SetStream(NULL, NULL);
 594 #endif
 595
 596 #if wxUSE_LOG
 597     // do it as the very last thing because everything else can log messages
 598     delete wxLog::SetActiveTarget(NULL);
 599 #endif // wxUSE_LOG
 600 }
 601
 602 //----------------------------------------------------------------------
 603 // Entry point helpers, used by wxPython
 604 //----------------------------------------------------------------------
 605
 606 int  WXDLLEXPORT wxEntryStart( int WXUNUSED(argc), char** WXUNUSED(argv) )
 607 {
 608     return wxApp::Initialize();
 609 }
 610
 611 int  WXDLLEXPORT wxEntryInitGui()
 612 {
 613     wxTheApp->OnInitGui();
 614     return 0;
 615 }
 616
 617 void WXDLLEXPORT wxEntryCleanup()
 618 {
 619     wxApp::CleanUp();
 620 }
 621
 622
 623 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 624
 625 // temporarily disable this warning which would be generated in release builds
 626 // because of __try
 627 #ifdef __VISUALC__
 628     #pragma warning(disable: 4715) // not all control paths return a value
 629 #endif // Visual C++
 630
 631 //----------------------------------------------------------------------
 632 // Main wxWindows entry point
 633 //----------------------------------------------------------------------
 634 int wxEntry(WXHINSTANCE hInstance,
 635             WXHINSTANCE WXUNUSED(hPrevInstance),
 636             char *lpCmdLine,
 637             int nCmdShow,
 638             bool enterLoop)
 639 {
 640     // do check for memory leaks on program exit
 641     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 642     //  deallocated memory which may be used to simulate low-memory condition)
 643     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 644 #ifdef __MWERKS__
 645 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 646     // This seems to be necessary since there are 'rogue'
 647     // objects present at this point (perhaps global objects?)
 648     // Setting a checkpoint will ignore them as far as the
 649     // memory checking facility is concerned.
 650     // Of course you may argue that memory allocated in globals should be
 651     // checked, but this is a reasonable compromise.
 652     wxDebugContext::SetCheckpoint();
 653 #endif
 654 #endif
 655     // take everything into a try-except block in release build
 656     // FIXME other compilers must support Win32 SEH (structured exception
 657     //       handling) too, just find the appropriate keyword in their docs!
 658     //       Please note that it's _not_ the same as C++ exceptions!
 659 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 660     #define CATCH_PROGRAM_EXCEPTIONS
 661
 662     __try {
 663 #else
 664     #undef  CATCH_PROGRAM_EXCEPTIONS
 665 #endif
 666         wxhInstance = (HINSTANCE) hInstance;
 667
 668         if (!wxEntryStart(0,0))
 669             return 0;
 670
 671         // create the application object or ensure that one already exists
 672         if (!wxTheApp)
 673         {
 674             // The app may have declared a global application object, but we recommend
 675             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 676             // function for delayed, dynamic app object construction.
 677             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 678                          wxT("No initializer - use IMPLEMENT_APP macro.") );
 679
 680             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 681         }
 682
 683         wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
 684
 685         // save the WinMain() parameters
 686         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 687         wxTheApp->m_nCmdShow = nCmdShow;
 688
 689         // GUI-specific initialisation. In fact on Windows we don't have any,
 690         // but this call is provided for compatibility across platforms.
 691         wxEntryInitGui();
 692
 693         // We really don't want timestamps by default, because it means
 694         // we can't simply double-click on the error message and get to that
 695         // line in the source. So VC++ at least, let's have a sensible default.
 696 #ifdef __VISUALC__
 697         wxLog::SetTimestamp(NULL);
 698 #endif
 699
 700         int retValue = 0;
 701
 702         if ( wxTheApp->OnInit() )
 703         {
 704             if ( enterLoop )
 705             {
 706                 retValue = wxTheApp->OnRun();
 707             }
 708             else
 709                 // We want to initialize, but not run or exit immediately.
 710                 return 1;
 711         }
 712         //else: app initialization failed, so we skipped OnRun()
 713
 714         wxWindow *topWindow = wxTheApp->GetTopWindow();
 715         if ( topWindow )
 716         {
 717             // Forcibly delete the window.
 718             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 719                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 720             {
 721                 topWindow->Close(TRUE);
 722                 wxTheApp->DeletePendingObjects();
 723             }
 724             else
 725             {
 726                 delete topWindow;
 727                 wxTheApp->SetTopWindow(NULL);
 728             }
 729         }
 730
 731         wxTheApp->OnExit();
 732
 733         wxEntryCleanup();
 734
 735         return retValue;
 736
 737 #ifdef CATCH_PROGRAM_EXCEPTIONS
 738     }
 739     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 740         /*
 741            if ( wxTheApp )
 742            wxTheApp->OnFatalException();
 743          */
 744
 745         // using wxLog would be unsafe here
 746         ::MessageBox(NULL,
 747                      _("Unrecoverable program error detected: "
 748                      " the application will terminate."),
 749                      _("Fatal Error"),
 750                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 751
 752         ::ExitProcess(3); // the same exit code as abort()
 753
 754         // NOTREACHED
 755     }
 756 #endif // CATCH_PROGRAM_EXCEPTIONS
 757 }
 758
 759 // restore warning state
 760 #ifdef __VISUALC__
 761     #pragma warning(default: 4715) // not all control paths return a value
 762 #endif // Visual C++
 763
 764 #else /*  _WINDLL  */
 765
 766 //----------------------------------------------------------------------
 767 // Entry point for wxWindows + the App in a DLL
 768 //----------------------------------------------------------------------
 769
 770 int wxEntry(WXHINSTANCE hInstance)
 771 {
 772     wxhInstance = (HINSTANCE) hInstance;
 773     wxEntryStart(0, 0);
 774
 775     // The app may have declared a global application object, but we recommend
 776     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 777     // for delayed, dynamic app object construction.
 778     if (!wxTheApp)
 779     {
 780         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 781                      "No initializer - use IMPLEMENT_APP macro." );
 782
 783         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 784     }
 785
 786     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 787
 788     wxTheApp->argc = 0;
 789     wxTheApp->argv = NULL;
 790
 791     wxEntryInitGui();
 792
 793     wxTheApp->OnInit();
 794
 795     wxWindow *topWindow = wxTheApp->GetTopWindow();
 796     if ( topWindow && topWindow->GetHWND())
 797     {
 798         topWindow->Show(TRUE);
 799     }
 800
 801     return 1;
 802 }
 803 #endif // _WINDLL
 804
 805 //// Static member initialization
 806
 807 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 808
 809 wxApp::wxApp()
 810 {
 811     m_topWindow = NULL;
 812     wxTheApp = this;
 813     m_wantDebugOutput = TRUE;
 814
 815     argc = 0;
 816     argv = NULL;
 817     m_printMode = wxPRINT_WINDOWS;
 818     m_exitOnFrameDelete = TRUE;
 819     m_auto3D = TRUE;
 820 }
 821
 822 wxApp::~wxApp()
 823 {
 824     // Delete command-line args
 825     int i;
 826     for (i = 0; i < argc; i++)
 827     {
 828         delete[] argv[i];
 829     }
 830     delete[] argv;
 831 }
 832
 833 bool wxApp::Initialized()
 834 {
 835 #ifndef _WINDLL
 836     if (GetTopWindow())
 837         return TRUE;
 838     else
 839         return FALSE;
 840 #endif
 841 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 842     return TRUE;
 843 #endif
 844 }
 845
 846 /*
 847  * Get and process a message, returning FALSE if WM_QUIT
 848  * received (and also set the flag telling the app to exit the main loop)
 849  *
 850  */
 851 bool wxApp::DoMessage()
 852 {
 853     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 854     if ( rc == 0 )
 855     {
 856         // got WM_QUIT
 857         m_keepGoing = FALSE;
 858
 859         return FALSE;
 860     }
 861     else if ( rc == -1 )
 862     {
 863         // should never happen, but let's test for it nevertheless
 864         wxLogLastError("GetMessage");
 865     }
 866     else
 867     {
 868 #if wxUSE_THREADS
 869         wxASSERT_MSG( wxThread::IsMain(),
 870                       wxT("only the main thread can process Windows messages") );
 871
 872         static bool s_hadGuiLock = TRUE;
 873         static wxMsgArray s_aSavedMessages;
 874
 875         // if a secondary thread owns is doing GUI calls, save all messages for
 876         // later processing - we can't process them right now because it will
 877         // lead to recursive library calls (and we're not reentrant)
 878         if ( !wxGuiOwnedByMainThread() )
 879         {
 880             s_hadGuiLock = FALSE;
 881
 882             // leave out WM_COMMAND messages: too dangerous, sometimes
 883             // the message will be processed twice
 884             if ( !wxIsWaitingForThread() ||
 885                     s_currentMsg.message != WM_COMMAND )
 886             {
 887                 s_aSavedMessages.Add(s_currentMsg);
 888             }
 889
 890             return TRUE;
 891         }
 892         else
 893         {
 894             // have we just regained the GUI lock? if so, post all of the saved
 895             // messages
 896             //
 897             // FIXME of course, it's not _exactly_ the same as processing the
 898             //       messages normally - expect some things to break...
 899             if ( !s_hadGuiLock )
 900             {
 901                 s_hadGuiLock = TRUE;
 902
 903                 size_t count = s_aSavedMessages.Count();
 904                 for ( size_t n = 0; n < count; n++ )
 905                 {
 906                     MSG& msg = s_aSavedMessages[n];
 907
 908                     if ( !ProcessMessage((WXMSG *)&msg) )
 909                     {
 910                         ::TranslateMessage(&msg);
 911                         ::DispatchMessage(&msg);
 912                     }
 913                 }
 914
 915                 s_aSavedMessages.Empty();
 916             }
 917         }
 918 #endif // wxUSE_THREADS
 919
 920         // Process the message
 921         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 922         {
 923             ::TranslateMessage(&s_currentMsg);
 924             ::DispatchMessage(&s_currentMsg);
 925         }
 926     }
 927
 928     return TRUE;
 929 }
 930
 931 /*
 932  * Keep trying to process messages until WM_QUIT
 933  * received.
 934  *
 935  * If there are messages to be processed, they will all be
 936  * processed and OnIdle will not be called.
 937  * When there are no more messages, OnIdle is called.
 938  * If OnIdle requests more time,
 939  * it will be repeatedly called so long as there are no pending messages.
 940  * A 'feature' of this is that once OnIdle has decided that no more processing
 941  * is required, then it won't get processing time until further messages
 942  * are processed (it'll sit in DoMessage).
 943  */
 944
 945 int wxApp::MainLoop()
 946 {
 947     m_keepGoing = TRUE;
 948
 949     while ( m_keepGoing )
 950     {
 951 #if wxUSE_THREADS
 952         wxMutexGuiLeaveOrEnter();
 953 #endif // wxUSE_THREADS
 954
 955         while ( !Pending() && ProcessIdle() )
 956             ;
 957
 958         // a message came or no more idle processing to do
 959         DoMessage();
 960     }
 961
 962     return s_currentMsg.wParam;
 963 }
 964
 965 // Returns TRUE if more time is needed.
 966 bool wxApp::ProcessIdle()
 967 {
 968     wxIdleEvent event;
 969     event.SetEventObject(this);
 970     ProcessEvent(event);
 971
 972     return event.MoreRequested();
 973 }
 974
 975 void wxApp::ExitMainLoop()
 976 {
 977     // VZ: why not ::PostQuitMessage()?
 978     m_keepGoing = FALSE;
 979 }
 980
 981 bool wxApp::Pending()
 982 {
 983     return ::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0;
 984 }
 985
 986 void wxApp::Dispatch()
 987 {
 988     DoMessage();
 989 }
 990
 991 /*
 992  * Give all windows a chance to preprocess
 993  * the message. Some may have accelerator tables, or have
 994  * MDI complications.
 995  */
 996
 997 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 998 {
 999     MSG *msg = (MSG *)wxmsg;
1000     HWND hWnd = msg->hwnd;
1001     wxWindow *wndThis = wxGetWindowFromHWND((WXHWND)hWnd);
1002
1003 #if wxUSE_TOOLTIPS
1004     // we must relay WM_MOUSEMOVE events to the tooltip ctrl if we want it to
1005     // popup the tooltip bubbles
1006     if ( wndThis && (msg->message == WM_MOUSEMOVE) )
1007     {
1008         wxToolTip *tt = wndThis->GetToolTip();
1009         if ( tt )
1010         {
1011             tt->RelayEvent(wxmsg);
1012         }
1013     }
1014 #endif // wxUSE_TOOLTIPS
1015
1016     // Try translations first; find the youngest window with
1017     // a translation table.
1018     wxWindow *wnd;
1019     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
1020     {
1021         if ( wnd->MSWTranslateMessage(wxmsg) )
1022             return TRUE;
1023     }
1024
1025     // Anyone for a non-translation message? Try youngest descendants first.
1026     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
1027     {
1028         if ( wnd->MSWProcessMessage(wxmsg) )
1029             return TRUE;
1030     }
1031
1032     return FALSE;
1033 }
1034
1035 void wxApp::OnIdle(wxIdleEvent& event)
1036 {
1037     static bool s_inOnIdle = FALSE;
1038
1039     // Avoid recursion (via ProcessEvent default case)
1040     if ( s_inOnIdle )
1041         return;
1042
1043     s_inOnIdle = TRUE;
1044
1045     // If there are pending events, we must process them: pending events
1046     // are either events to the threads other than main or events posted
1047     // with wxPostEvent() functions
1048     // GRG: I have moved this here so that all pending events are processed
1049     //   before starting to delete any objects. This behaves better (in
1050     //   particular, wrt wxPostEvent) and is coherent with wxGTK's current
1051     //   behaviour. Changed Feb/2000 before 2.1.14
1052     ProcessPendingEvents();
1053
1054     // 'Garbage' collection of windows deleted with Close().
1055     DeletePendingObjects();
1056
1057 #if wxUSE_LOG
1058     // flush the logged messages if any
1059     wxLog::FlushActive();
1060 #endif // wxUSE_LOG
1061
1062     // Send OnIdle events to all windows
1063     if ( SendIdleEvents() )
1064     {
1065         // SendIdleEvents() returns TRUE if at least one window requested more
1066         // idle events
1067         event.RequestMore(TRUE);
1068     }
1069
1070     s_inOnIdle = FALSE;
1071 }
1072
1073 // Send idle event to all top-level windows
1074 bool wxApp::SendIdleEvents()
1075 {
1076     bool needMore = FALSE;
1077
1078     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1079     while (node)
1080     {
1081         wxWindow* win = node->GetData();
1082         if (SendIdleEvents(win))
1083             needMore = TRUE;
1084         node = node->GetNext();
1085     }
1086
1087     return needMore;
1088 }
1089
1090 // Send idle event to window and all subwindows
1091 bool wxApp::SendIdleEvents(wxWindow* win)
1092 {
1093     bool needMore = FALSE;
1094
1095     wxIdleEvent event;
1096     event.SetEventObject(win);
1097     win->GetEventHandler()->ProcessEvent(event);
1098
1099     if (event.MoreRequested())
1100         needMore = TRUE;
1101
1102     wxNode* node = win->GetChildren().First();
1103     while (node)
1104     {
1105         wxWindow* win = (wxWindow*) node->Data();
1106         if (SendIdleEvents(win))
1107             needMore = TRUE;
1108
1109         node = node->Next();
1110     }
1111     return needMore;
1112 }
1113
1114 void wxApp::DeletePendingObjects()
1115 {
1116     wxNode *node = wxPendingDelete.First();
1117     while (node)
1118     {
1119         wxObject *obj = (wxObject *)node->Data();
1120
1121         delete obj;
1122
1123         if (wxPendingDelete.Member(obj))
1124             delete node;
1125
1126         // Deleting one object may have deleted other pending
1127         // objects, so start from beginning of list again.
1128         node = wxPendingDelete.First();
1129     }
1130 }
1131
1132 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1133 {
1134     if (GetTopWindow())
1135         GetTopWindow()->Close(TRUE);
1136 }
1137
1138 // Default behaviour: close the application with prompts. The
1139 // user can veto the close, and therefore the end session.
1140 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1141 {
1142     if (GetTopWindow())
1143     {
1144         if (!GetTopWindow()->Close(!event.CanVeto()))
1145             event.Veto(TRUE);
1146     }
1147 }
1148
1149 /* static */
1150 int wxApp::GetComCtl32Version()
1151 {
1152     // cache the result
1153     static int s_verComCtl32 = -1;
1154
1155     wxCRIT_SECT_DECLARE(csComCtl32);
1156     wxCRIT_SECT_LOCKER(lock, csComCtl32);
1157
1158     if ( s_verComCtl32 == -1 )
1159     {
1160         // initally assume no comctl32.dll at all
1161         s_verComCtl32 = 0;
1162
1163         // do we have it?
1164         HMODULE hModuleComCtl32 = ::GetModuleHandle(wxT("COMCTL32"));
1165
1166         // if so, then we can check for the version
1167         if ( hModuleComCtl32 )
1168         {
1169             // try to use DllGetVersion() if available in _headers_
1170             #ifdef DLLVER_PLATFORM_WINDOWS // defined in shlwapi.h
1171                 DLLGETVERSIONPROC pfnDllGetVersion = (DLLGETVERSIONPROC)
1172                     ::GetProcAddress(hModuleComCtl32, _T("DllGetVersion"));
1173                 if ( pfnDllGetVersion )
1174                 {
1175                     DLLVERSIONINFO dvi;
1176                     dvi.cbSize = sizeof(dvi);
1177
1178                     HRESULT hr = (*pfnDllGetVersion)(&dvi);
1179                     if ( FAILED(hr) )
1180                     {
1181                         wxLogApiError(_T("DllGetVersion"), hr);
1182                     }
1183                     else
1184                     {
1185                         // this is incompatible with _WIN32_IE values, but
1186                         // compatible with the other values returned by
1187                         // GetComCtl32Version()
1188                         s_verComCtl32 = 100*dvi.dwMajorVersion +
1189                                             dvi.dwMinorVersion;
1190                     }
1191                 }
1192             #endif
1193                 // DllGetVersion() unavailable either during compile or
1194                 // run-time, try to guess the version otherwise
1195                 if ( !s_verComCtl32 )
1196                 {
1197                     // InitCommonControlsEx is unique to 4.70 and later
1198                     FARPROC theProc = ::GetProcAddress
1199                                         (
1200                                          hModuleComCtl32,
1201 #if defined(__BORLANDC__) && (__BORLANDC__ <= 0x520)
1202                                          "InitCommonControlsEx"
1203 #else
1204                                          _T("InitCommonControlsEx")
1205 #endif
1206                                         );
1207
1208                     if ( !theProc )
1209                     {
1210                         // not found, must be 4.00
1211                         s_verComCtl32 = 400;
1212                     }
1213                     else
1214                     {
1215                         // many symbols appeared in comctl32 4.71, could use
1216                         // any of them except may be DllInstall
1217                         theProc = ::GetProcAddress
1218                                     (
1219                                      hModuleComCtl32,
1220 #if defined(__BORLANDC__) && (__BORLANDC__ <= 0x520)
1221                                      "InitializeFlatSB"
1222 #else
1223                                      _T("InitializeFlatSB")
1224 #endif
1225                                     );
1226                         if ( !theProc )
1227                         {
1228                             // not found, must be 4.70
1229                             s_verComCtl32 = 470;
1230                         }
1231                         else
1232                         {
1233                             // found, must be 4.71
1234                             s_verComCtl32 = 471;
1235                         }
1236                     }
1237                 }
1238         }
1239     }
1240
1241     return s_verComCtl32;
1242 }
1243
1244 void wxExit()
1245 {
1246     wxLogError(_("Fatal error: exiting"));
1247
1248     wxApp::CleanUp();
1249     exit(0);
1250 }
1251
1252 // Yield to incoming messages
1253 bool wxYield()
1254 {
1255     // disable log flushing from here because a call to wxYield() shouldn't
1256     // normally result in message boxes popping up &c
1257     wxLog::Suspend();
1258
1259     // we don't want to process WM_QUIT from here - it should be processed in
1260     // the main event loop in order to stop it
1261     MSG msg;
1262     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
1263             msg.message != WM_QUIT )
1264     {
1265 #if wxUSE_THREADS
1266         wxMutexGuiLeaveOrEnter();
1267 #endif // wxUSE_THREADS
1268
1269         if ( !wxTheApp->DoMessage() )
1270             break;
1271     }
1272
1273     // If they are pending events, we must process them.
1274     if (wxTheApp)
1275         wxTheApp->ProcessPendingEvents();
1276
1277     // let the logs be flashed again
1278     wxLog::Resume();
1279
1280     return TRUE;
1281 }
1282
1283 //-----------------------------------------------------------------------------
1284 // wxWakeUpIdle
1285 //-----------------------------------------------------------------------------
1286
1287 void wxWakeUpIdle()
1288 {
1289     // Send the top window a dummy message so idle handler processing will
1290     // start up again.  Doing it this way ensures that the idle handler
1291     // wakes up in the right thread (see also wxWakeUpMainThread() which does
1292     // the same for the main app thread only)
1293     wxWindow *topWindow = wxTheApp->GetTopWindow();
1294     if ( topWindow )
1295     {
1296         if ( !::PostMessage(GetHwndOf(topWindow), WM_NULL, 0, 0) )
1297         {
1298             // should never happen
1299             wxLogLastError("PostMessage(WM_NULL)");
1300         }
1301     }
1302 }
1303
1304 //-----------------------------------------------------------------------------
1305
1306 wxIcon
1307 wxApp::GetStdIcon(int which) const
1308 {
1309     switch(which)
1310     {
1311         case wxICON_INFORMATION:
1312             return wxIcon("wxICON_INFO");
1313
1314         case wxICON_QUESTION:
1315             return wxIcon("wxICON_QUESTION");
1316
1317         case wxICON_EXCLAMATION:
1318             return wxIcon("wxICON_WARNING");
1319
1320         default:
1321             wxFAIL_MSG(wxT("requested non existent standard icon"));
1322             // still fall through
1323
1324         case wxICON_HAND:
1325             return wxIcon("wxICON_ERROR");
1326     }
1327 }
1328
1329 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1330 // if in a separate file. So include it here to ensure it's linked.
1331 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__) && !defined(WXMAKINGDLL))
1332 #include "main.cpp"
1333 #endif