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 // OLE is used for drag-and-drop, clipboard, OLE Automation...
  71 #ifndef wxUSE_NORLANDER_HEADERS
  72 #if defined(__GNUWIN32__) || defined(__SC__) || defined(__SALFORDC__)
  73     #undef wxUSE_OLE
  74
  75     #define  wxUSE_OLE 0
  76 #endif // broken compilers
  77 #endif
  78
  79 #if wxUSE_OLE
  80     #include <ole2.h>
  81 #endif
  82
  83 #include <string.h>
  84 #include <ctype.h>
  85
  86 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__) || defined(wxUSE_NORLANDER_HEADERS)
  87     #include <commctrl.h>
  88     #include <shlwapi.h>
  89 #endif
  90
  91 #include "wx/msw/msvcrt.h"
  92
  93 // ----------------------------------------------------------------------------
  94 // conditional compilation
  95 // ----------------------------------------------------------------------------
  96
  97 // The macro _WIN32_IE is defined by commctrl.h (unless it had already been
  98 // defined before) and shows us what common control features are available
  99 // during the compile time (it doesn't mean that they will be available during
 100 // the run-time, use GetComCtl32Version() to test for them!). The possible
 101 // values are:
 102 //
 103 // 0x0200     for comctl32.dll 4.00 shipped with Win95/NT 4.0
 104 // 0x0300                      4.70              IE 3.x
 105 // 0x0400                      4.71              IE 4.0
 106 // 0x0401                      4.72              IE 4.01 and Win98
 107 // 0x0500                      5.00              IE 5.x and NT 5.0 (Win2000)
 108
 109 #ifndef _WIN32_IE
 110     // minimal set of features by default
 111     #define _WIN32_IE 0x0200
 112 #endif
 113
 114 // ---------------------------------------------------------------------------
 115 // global variables
 116 // ---------------------------------------------------------------------------
 117
 118 extern wxChar *wxBuffer;
 119 extern wxChar *wxOsVersion;
 120 extern wxList *wxWinHandleList;
 121 extern wxList WXDLLEXPORT wxPendingDelete;
 122 extern void wxSetKeyboardHook(bool doIt);
 123 extern wxCursor *g_globalCursor;
 124
 125 MSG s_currentMsg;
 126 wxApp *wxTheApp = NULL;
 127
 128 // FIXME why not const? and not static?
 129
 130 // NB: all "NoRedraw" classes must have the same names as the "normal" classes
 131 //     with NR suffix - wxWindow::MSWCreate() supposes this
 132 wxChar wxFrameClassName[]         = wxT("wxFrameClass");
 133 wxChar wxFrameClassNameNoRedraw[] = wxT("wxFrameClassNR");
 134 wxChar wxMDIFrameClassName[]      = wxT("wxMDIFrameClass");
 135 wxChar wxMDIFrameClassNameNoRedraw[] = wxT("wxMDIFrameClassNR");
 136 wxChar wxMDIChildFrameClassName[] = wxT("wxMDIChildFrameClass");
 137 wxChar wxMDIChildFrameClassNameNoRedraw[] = wxT("wxMDIChildFrameClassNR");
 138 wxChar wxPanelClassName[]         = wxT("wxPanelClass");
 139 wxChar wxCanvasClassName[]        = wxT("wxCanvasClass");
 140
 141 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 142 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 143 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 144
 145 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 146 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 147 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 148
 149 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 150
 151 LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 152
 153 #if wxUSE_RICHEDIT
 154     // the handle to richedit DLL and the version of the DLL loaded
 155     static HINSTANCE gs_hRichEdit = (HINSTANCE)NULL;
 156     static int gs_verRichEdit = -1;
 157 #endif
 158
 159 // ===========================================================================
 160 // implementation
 161 // ===========================================================================
 162
 163 // ---------------------------------------------------------------------------
 164 // wxApp
 165 // ---------------------------------------------------------------------------
 166
 167 #if !USE_SHARED_LIBRARY
 168     IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 169
 170     BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 171         EVT_IDLE(wxApp::OnIdle)
 172         EVT_END_SESSION(wxApp::OnEndSession)
 173         EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 174     END_EVENT_TABLE()
 175 #endif
 176
 177 //// Initialize
 178 bool wxApp::Initialize()
 179 {
 180     // Some people may wish to use this, but
 181     // probably it shouldn't be here by default.
 182 #ifdef __WXDEBUG__
 183     //    wxRedirectIOToConsole();
 184 #endif
 185
 186     wxBuffer = new wxChar[1500]; // FIXME
 187
 188     wxClassInfo::InitializeClasses();
 189
 190 #if wxUSE_RESOURCES
 191     wxGetResource(wxT("wxWindows"), wxT("OsVersion"), &wxOsVersion);
 192 #endif
 193
 194 #if wxUSE_THREADS
 195     wxPendingEventsLocker = new wxCriticalSection;
 196 #endif
 197
 198     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 199     wxTheColourDatabase->Initialize();
 200
 201     wxInitializeStockLists();
 202     wxInitializeStockObjects();
 203
 204 #if wxUSE_WX_RESOURCES
 205     wxInitializeResourceSystem();
 206 #endif
 207
 208     wxBitmap::InitStandardHandlers();
 209
 210 #if defined(__WIN95__)
 211     InitCommonControls();
 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     // VZ: these icons are not in wx.rc anyhow (but should they?)!
 238 #if 0
 239     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
 240     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
 241     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
 242
 243     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
 244     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
 245     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDICHILDFRAME"));
 246 #endif // 0
 247
 248     RegisterWindowClasses();
 249
 250     // Create the brush for disabling bitmap buttons
 251
 252     LOGBRUSH lb;
 253     lb.lbStyle = BS_PATTERN;
 254     lb.lbHatch = (int)LoadBitmap( wxhInstance, wxT("wxDISABLE_BUTTON_BITMAP") );
 255     if ( lb.lbHatch )
 256     {
 257         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 258         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 259     }
 260     //else: wxWindows resources are probably not linked in
 261
 262 #if wxUSE_PENWINDOWS
 263     wxRegisterPenWin();
 264 #endif
 265
 266     wxWinHandleList = new wxList(wxKEY_INTEGER);
 267
 268     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 269     // PLEASE DO NOT ALTER THIS.
 270 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 271     extern char wxDummyChar;
 272     if (wxDummyChar) wxDummyChar++;
 273 #endif
 274
 275     wxSetKeyboardHook(TRUE);
 276
 277     wxModule::RegisterModules();
 278     if (!wxModule::InitializeModules())
 279         return FALSE;
 280     return TRUE;
 281 }
 282
 283 // ---------------------------------------------------------------------------
 284 // RegisterWindowClasses
 285 // ---------------------------------------------------------------------------
 286
 287 // TODO we should only register classes really used by the app. For this it
 288 //      would be enough to just delay the class registration until an attempt
 289 //      to create a window of this class is made.
 290 bool wxApp::RegisterWindowClasses()
 291 {
 292     WNDCLASS wndclass;
 293
 294     // for each class we register one with CS_(V|H)REDRAW style and one
 295     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 296     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 297     static const long styleNoRedraw = CS_DBLCLKS;
 298
 299     // the fields which are common to all classes
 300     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 301     wndclass.cbClsExtra    = 0;
 302     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 303     wndclass.hInstance     = wxhInstance;
 304     wndclass.hIcon         = (HICON) NULL;
 305     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 306     wndclass.lpszMenuName  = NULL;
 307
 308     // Register the frame window class.
 309     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 310     wndclass.lpszClassName = wxFrameClassName;
 311     wndclass.style         = styleNormal;
 312
 313     if ( !RegisterClass(&wndclass) )
 314     {
 315         wxLogLastError("RegisterClass(frame)");
 316
 317         return FALSE;
 318     }
 319
 320     // "no redraw" frame
 321     wndclass.lpszClassName = wxFrameClassNameNoRedraw;
 322     wndclass.style         = styleNoRedraw;
 323
 324     if ( !RegisterClass(&wndclass) )
 325     {
 326         wxLogLastError("RegisterClass(no redraw frame)");
 327
 328         return FALSE;
 329     }
 330
 331     // Register the MDI frame window class.
 332     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 333     wndclass.lpszClassName = wxMDIFrameClassName;
 334     wndclass.style         = styleNormal;
 335
 336     if ( !RegisterClass(&wndclass) )
 337     {
 338         wxLogLastError("RegisterClass(MDI parent)");
 339
 340         return FALSE;
 341     }
 342
 343     // "no redraw" MDI frame
 344     wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
 345     wndclass.style         = styleNoRedraw;
 346
 347     if ( !RegisterClass(&wndclass) )
 348     {
 349         wxLogLastError("RegisterClass(no redraw MDI parent frame)");
 350
 351         return FALSE;
 352     }
 353
 354     // Register the MDI child frame window class.
 355     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 356     wndclass.lpszClassName = wxMDIChildFrameClassName;
 357     wndclass.style         = styleNormal;
 358
 359     if ( !RegisterClass(&wndclass) )
 360     {
 361         wxLogLastError("RegisterClass(MDI child)");
 362
 363         return FALSE;
 364     }
 365
 366     // "no redraw" MDI child frame
 367     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 368     wndclass.style         = styleNoRedraw;
 369
 370     if ( !RegisterClass(&wndclass) )
 371     {
 372         wxLogLastError("RegisterClass(no redraw MDI child)");
 373
 374         return FALSE;
 375     }
 376
 377     // Register the panel window class.
 378     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 379     wndclass.lpszClassName = wxPanelClassName;
 380     wndclass.style         = styleNormal;
 381
 382     if ( !RegisterClass(&wndclass) )
 383     {
 384         wxLogLastError("RegisterClass(panel)");
 385
 386         return FALSE;
 387     }
 388
 389     // Register the canvas and textsubwindow class name
 390     wndclass.hbrBackground = (HBRUSH)NULL;
 391     wndclass.lpszClassName = wxCanvasClassName;
 392
 393     if ( !RegisterClass(&wndclass) )
 394     {
 395         wxLogLastError("RegisterClass(canvas)");
 396
 397         return FALSE;
 398     }
 399
 400     return TRUE;
 401 }
 402
 403 // ---------------------------------------------------------------------------
 404 // Convert Windows to argc, argv style
 405 // ---------------------------------------------------------------------------
 406
 407 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 408 {
 409     wxStringList args;
 410
 411     wxString cmdLine(lpCmdLine);
 412     int count = 0;
 413
 414     // Get application name
 415     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 416     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 417
 418     args.Add(name);
 419     count++;
 420
 421     wxStrcpy(name, wxFileNameFromPath(name));
 422     wxStripExtension(name);
 423     wxTheApp->SetAppName(name);
 424
 425     // Break up string
 426     // Treat strings enclosed in double-quotes as single arguments
 427     int i = 0;
 428     int len = cmdLine.Length();
 429     while (i < len)
 430     {
 431         // Skip whitespace
 432         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 433             i ++;
 434
 435         if (i < len)
 436         {
 437             if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
 438             {
 439                 i ++;
 440                 int first = i;
 441                 while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
 442                     i ++;
 443
 444                 wxString arg(cmdLine.Mid(first, (i - first)));
 445
 446                 args.Add(arg);
 447                 count ++;
 448
 449                 if (i < len)
 450                     i ++; // Skip past 2nd quote
 451             }
 452             else // Unquoted argument
 453             {
 454                 int first = i;
 455                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 456                     i ++;
 457
 458                 wxString arg(cmdLine.Mid(first, (i - first)));
 459
 460                 args.Add(arg);
 461                 count ++;
 462             }
 463         }
 464     }
 465
 466     wxTheApp->argv = new wxChar*[count + 1];
 467     for (i = 0; i < count; i++)
 468     {
 469         wxString arg(args[i]);
 470         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 471     }
 472     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 473     wxTheApp->argc = count;
 474 }
 475
 476 //// Cleans up any wxWindows internal structures left lying around
 477
 478 void wxApp::CleanUp()
 479 {
 480     //// COMMON CLEANUP
 481
 482 #if wxUSE_LOG
 483     // flush the logged messages if any and install a 'safer' log target: the
 484     // default one (wxLogGui) can't be used after the resources are freed just
 485     // below and the user suppliedo ne might be even more unsafe (using any
 486     // wxWindows GUI function is unsafe starting from now)
 487     wxLog::DontCreateOnDemand();
 488
 489     // this will flush the old messages if any
 490     delete wxLog::SetActiveTarget(new wxLogStderr);
 491 #endif // wxUSE_LOG
 492
 493     // One last chance for pending objects to be cleaned up
 494     wxTheApp->DeletePendingObjects();
 495
 496     wxModule::CleanUpModules();
 497
 498 #if wxUSE_WX_RESOURCES
 499     wxCleanUpResourceSystem();
 500
 501     //  wxDefaultResourceTable->ClearTable();
 502 #endif
 503
 504     // Indicate that the cursor can be freed, so that cursor won't be deleted
 505     // by deleting the bitmap list before g_globalCursor goes out of scope
 506     // (double deletion of the cursor).
 507     wxSetCursor(wxNullCursor);
 508     delete g_globalCursor;
 509     g_globalCursor = NULL;
 510
 511     wxDeleteStockObjects();
 512
 513     // Destroy all GDI lists, etc.
 514     wxDeleteStockLists();
 515
 516     delete wxTheColourDatabase;
 517     wxTheColourDatabase = NULL;
 518
 519     wxBitmap::CleanUpHandlers();
 520
 521     delete[] wxBuffer;
 522     wxBuffer = NULL;
 523
 524     //// WINDOWS-SPECIFIC CLEANUP
 525
 526     wxSetKeyboardHook(FALSE);
 527
 528 #if wxUSE_RICHEDIT
 529     if (gs_hRichEdit != (HINSTANCE) NULL)
 530         FreeLibrary(gs_hRichEdit);
 531 #endif
 532
 533 #if wxUSE_PENWINDOWS
 534     wxCleanUpPenWin();
 535 #endif
 536
 537     if (wxSTD_FRAME_ICON)
 538         DestroyIcon(wxSTD_FRAME_ICON);
 539     if (wxSTD_MDICHILDFRAME_ICON)
 540         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 541     if (wxSTD_MDIPARENTFRAME_ICON)
 542         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 543
 544     if (wxDEFAULT_FRAME_ICON)
 545         DestroyIcon(wxDEFAULT_FRAME_ICON);
 546     if (wxDEFAULT_MDICHILDFRAME_ICON)
 547         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 548     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 549         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 550
 551     if ( wxDisableButtonBrush )
 552         ::DeleteObject( wxDisableButtonBrush );
 553
 554 #if wxUSE_OLE
 555     ::OleUninitialize();
 556 #endif
 557
 558 #if wxUSE_CTL3D
 559     Ctl3dUnregister(wxhInstance);
 560 #endif
 561
 562     if (wxWinHandleList)
 563         delete wxWinHandleList;
 564
 565     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 566     // create a module for that as it's part of the core.
 567     delete wxPendingEvents;
 568 #if wxUSE_THREADS
 569     delete wxPendingEventsLocker;
 570     // If we don't do the following, we get an apparent memory leak.
 571     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 572 #endif
 573
 574     wxClassInfo::CleanUpClasses();
 575
 576     delete wxTheApp;
 577     wxTheApp = NULL;
 578
 579 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 580     // At this point we want to check if there are any memory
 581     // blocks that aren't part of the wxDebugContext itself,
 582     // as a special case. Then when dumping we need to ignore
 583     // wxDebugContext, too.
 584     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 585     {
 586         wxLogDebug(wxT("There were memory leaks."));
 587         wxDebugContext::Dump();
 588         wxDebugContext::PrintStatistics();
 589     }
 590     //  wxDebugContext::SetStream(NULL, NULL);
 591 #endif
 592
 593 #if wxUSE_LOG
 594     // do it as the very last thing because everything else can log messages
 595     delete wxLog::SetActiveTarget(NULL);
 596 #endif // wxUSE_LOG
 597 }
 598
 599 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 600
 601 // temporarily disable this warning which would be generated in release builds
 602 // because of __try
 603 #ifdef __VISUALC__
 604     #pragma warning(disable: 4715) // not all control paths return a value
 605 #endif // Visual C++
 606
 607 //// Main wxWindows entry point
 608 int wxEntry(WXHINSTANCE hInstance,
 609             WXHINSTANCE WXUNUSED(hPrevInstance),
 610             char *lpCmdLine,
 611             int nCmdShow,
 612             bool enterLoop)
 613 {
 614     // do check for memory leaks on program exit
 615     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 616     //  deallocated memory which may be used to simulate low-memory condition)
 617     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 618 #ifdef __MWERKS__
 619 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 620     // This seems to be necessary since there are 'rogue'
 621     // objects present at this point (perhaps global objects?)
 622     // Setting a checkpoint will ignore them as far as the
 623     // memory checking facility is concerned.
 624     // Of course you may argue that memory allocated in globals should be
 625     // checked, but this is a reasonable compromise.
 626     wxDebugContext::SetCheckpoint();
 627 #endif
 628 #endif
 629     // take everything into a try-except block in release build
 630     // FIXME other compilers must support Win32 SEH (structured exception
 631     //       handling) too, just find the appropriate keyword in their docs!
 632     //       Please note that it's _not_ the same as C++ exceptions!
 633 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 634     #define CATCH_PROGRAM_EXCEPTIONS
 635
 636     __try {
 637 #else
 638     #undef  CATCH_PROGRAM_EXCEPTIONS
 639 #endif
 640         wxhInstance = (HINSTANCE) hInstance;
 641
 642         if (!wxApp::Initialize())
 643             return 0;
 644
 645         // create the application object or ensure that one already exists
 646         if (!wxTheApp)
 647         {
 648             // The app may have declared a global application object, but we recommend
 649             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 650             // function for delayed, dynamic app object construction.
 651             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 652                          wxT("No initializer - use IMPLEMENT_APP macro.") );
 653
 654             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 655         }
 656
 657         wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
 658
 659         // save the WinMain() parameters
 660         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 661         wxTheApp->m_nCmdShow = nCmdShow;
 662
 663         // GUI-specific initialisation. In fact on Windows we don't have any,
 664         // but this call is provided for compatibility across platforms.
 665         wxTheApp->OnInitGui();
 666
 667         // We really don't want timestamps by default, because it means
 668         // we can't simply double-click on the error message and get to that
 669         // line in the source. So VC++ at least, let's have a sensible default.
 670 #ifdef __VISUALC__
 671         wxLog::SetTimestamp(NULL);
 672 #endif
 673
 674         int retValue = 0;
 675
 676         if ( wxTheApp->OnInit() )
 677         {
 678             if ( enterLoop )
 679             {
 680                 retValue = wxTheApp->OnRun();
 681             }
 682             else
 683                 // We want to initialize, but not run or exit immediately.
 684                 return 1;
 685         }
 686         //else: app initialization failed, so we skipped OnRun()
 687
 688         wxWindow *topWindow = wxTheApp->GetTopWindow();
 689         if ( topWindow )
 690         {
 691             // Forcibly delete the window.
 692             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 693                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 694             {
 695                 topWindow->Close(TRUE);
 696                 wxTheApp->DeletePendingObjects();
 697             }
 698             else
 699             {
 700                 delete topWindow;
 701                 wxTheApp->SetTopWindow(NULL);
 702             }
 703         }
 704
 705         wxTheApp->OnExit();
 706
 707         wxApp::CleanUp();
 708
 709         return retValue;
 710
 711 #ifdef CATCH_PROGRAM_EXCEPTIONS
 712     }
 713     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 714         /*
 715            if ( wxTheApp )
 716            wxTheApp->OnFatalException();
 717          */
 718
 719         // using wxLog would be unsafe here
 720         ::MessageBox(NULL,
 721                      _("Unrecoverable program error detected: "
 722                      " the application will terminate."),
 723                      _("Fatal Error"),
 724                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 725
 726         ::ExitProcess(3); // the same exit code as abort()
 727
 728         // NOTREACHED
 729     }
 730 #endif // CATCH_PROGRAM_EXCEPTIONS
 731 }
 732
 733 // restore warning state
 734 #ifdef __VISUALC__
 735     #pragma warning(default: 4715) // not all control paths return a value
 736 #endif // Visual C++
 737
 738 #else /*  _WINDLL  */
 739
 740 //// Entry point for DLLs
 741
 742 int wxEntry(WXHINSTANCE hInstance)
 743 {
 744     wxhInstance = (HINSTANCE) hInstance;
 745     wxApp::Initialize();
 746
 747     // The app may have declared a global application object, but we recommend
 748     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 749     // for delayed, dynamic app object construction.
 750     if (!wxTheApp)
 751     {
 752         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 753                      "No initializer - use IMPLEMENT_APP macro." );
 754
 755         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 756     }
 757
 758     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 759
 760     wxTheApp->argc = 0;
 761     wxTheApp->argv = NULL;
 762
 763     wxTheApp->OnInitGui();
 764
 765     wxTheApp->OnInit();
 766
 767     wxWindow *topWindow = wxTheApp->GetTopWindow();
 768     if ( topWindow && topWindow->GetHWND())
 769     {
 770         topWindow->Show(TRUE);
 771     }
 772
 773     return 1;
 774 }
 775 #endif // _WINDLL
 776
 777 //// Static member initialization
 778
 779 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 780
 781 wxApp::wxApp()
 782 {
 783     m_topWindow = NULL;
 784     wxTheApp = this;
 785     m_wantDebugOutput = TRUE;
 786
 787     argc = 0;
 788     argv = NULL;
 789     m_printMode = wxPRINT_WINDOWS;
 790     m_exitOnFrameDelete = TRUE;
 791     m_auto3D = TRUE;
 792 }
 793
 794 wxApp::~wxApp()
 795 {
 796     // Delete command-line args
 797     int i;
 798     for (i = 0; i < argc; i++)
 799     {
 800         delete[] argv[i];
 801     }
 802     delete[] argv;
 803 }
 804
 805 bool wxApp::Initialized()
 806 {
 807 #ifndef _WINDLL
 808     if (GetTopWindow())
 809         return TRUE;
 810     else
 811         return FALSE;
 812 #endif
 813 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 814     return TRUE;
 815 #endif
 816 }
 817
 818 /*
 819  * Get and process a message, returning FALSE if WM_QUIT
 820  * received (and also set the flag telling the app to exit the main loop)
 821  *
 822  */
 823 bool wxApp::DoMessage()
 824 {
 825     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 826     if ( rc == 0 )
 827     {
 828         // got WM_QUIT
 829         m_keepGoing = FALSE;
 830
 831         return FALSE;
 832     }
 833     else if ( rc == -1 )
 834     {
 835         // should never happen, but let's test for it nevertheless
 836         wxLogLastError("GetMessage");
 837     }
 838     else
 839     {
 840 #if wxUSE_THREADS
 841         wxASSERT_MSG( wxThread::IsMain(),
 842                       wxT("only the main thread can process Windows messages") );
 843
 844         static bool s_hadGuiLock = TRUE;
 845         static wxMsgArray s_aSavedMessages;
 846
 847         // if a secondary thread owns is doing GUI calls, save all messages for
 848         // later processing - we can't process them right now because it will
 849         // lead to recursive library calls (and we're not reentrant)
 850         if ( !wxGuiOwnedByMainThread() )
 851         {
 852             s_hadGuiLock = FALSE;
 853
 854             // leave out WM_COMMAND messages: too dangerous, sometimes
 855             // the message will be processed twice
 856             if ( !wxIsWaitingForThread() ||
 857                     s_currentMsg.message != WM_COMMAND )
 858             {
 859                 s_aSavedMessages.Add(s_currentMsg);
 860             }
 861
 862             return TRUE;
 863         }
 864         else
 865         {
 866             // have we just regained the GUI lock? if so, post all of the saved
 867             // messages
 868             //
 869             // FIXME of course, it's not _exactly_ the same as processing the
 870             //       messages normally - expect some things to break...
 871             if ( !s_hadGuiLock )
 872             {
 873                 s_hadGuiLock = TRUE;
 874
 875                 size_t count = s_aSavedMessages.Count();
 876                 for ( size_t n = 0; n < count; n++ )
 877                 {
 878                     MSG& msg = s_aSavedMessages[n];
 879
 880                     if ( !ProcessMessage((WXMSG *)&msg) )
 881                     {
 882                         ::TranslateMessage(&msg);
 883                         ::DispatchMessage(&msg);
 884                     }
 885                 }
 886
 887                 s_aSavedMessages.Empty();
 888             }
 889         }
 890 #endif // wxUSE_THREADS
 891
 892         // Process the message
 893         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 894         {
 895             ::TranslateMessage(&s_currentMsg);
 896             ::DispatchMessage(&s_currentMsg);
 897         }
 898     }
 899
 900     return TRUE;
 901 }
 902
 903 /*
 904  * Keep trying to process messages until WM_QUIT
 905  * received.
 906  *
 907  * If there are messages to be processed, they will all be
 908  * processed and OnIdle will not be called.
 909  * When there are no more messages, OnIdle is called.
 910  * If OnIdle requests more time,
 911  * it will be repeatedly called so long as there are no pending messages.
 912  * A 'feature' of this is that once OnIdle has decided that no more processing
 913  * is required, then it won't get processing time until further messages
 914  * are processed (it'll sit in DoMessage).
 915  */
 916
 917 int wxApp::MainLoop()
 918 {
 919     m_keepGoing = TRUE;
 920
 921     while ( m_keepGoing )
 922     {
 923 #if wxUSE_THREADS
 924         wxMutexGuiLeaveOrEnter();
 925 #endif // wxUSE_THREADS
 926
 927         while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 928                 ProcessIdle() )
 929         {
 930         }
 931
 932
 933         DoMessage();
 934     }
 935
 936     return s_currentMsg.wParam;
 937 }
 938
 939 // Returns TRUE if more time is needed.
 940 bool wxApp::ProcessIdle()
 941 {
 942     wxIdleEvent event;
 943     event.SetEventObject(this);
 944     ProcessEvent(event);
 945
 946     return event.MoreRequested();
 947 }
 948
 949 void wxApp::ExitMainLoop()
 950 {
 951     m_keepGoing = FALSE;
 952 }
 953
 954 bool wxApp::Pending()
 955 {
 956     return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0);
 957 }
 958
 959 void wxApp::Dispatch()
 960 {
 961     DoMessage();
 962 }
 963
 964 /*
 965  * Give all windows a chance to preprocess
 966  * the message. Some may have accelerator tables, or have
 967  * MDI complications.
 968  */
 969
 970 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 971 {
 972     MSG *msg = (MSG *)wxmsg;
 973     HWND hWnd = msg->hwnd;
 974     wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
 975
 976     // for some composite controls (like a combobox), wndThis might be NULL
 977     // because the subcontrol is not a wxWindow, but only the control itself
 978     // is - try to catch this case
 979     while ( hWnd && !wndThis )
 980     {
 981         hWnd = ::GetParent(hWnd);
 982         wndThis = wxFindWinFromHandle((WXHWND)hWnd);
 983     }
 984
 985     // Try translations first; find the youngest window with
 986     // a translation table.
 987     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 988     {
 989         if ( wnd->MSWTranslateMessage(wxmsg) )
 990             return TRUE;
 991     }
 992
 993     // Anyone for a non-translation message? Try youngest descendants first.
 994     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 995     {
 996         if ( wnd->MSWProcessMessage(wxmsg) )
 997             return TRUE;
 998     }
 999
1000     return FALSE;
1001 }
1002
1003 void wxApp::OnIdle(wxIdleEvent& event)
1004 {
1005     static bool s_inOnIdle = FALSE;
1006
1007     // Avoid recursion (via ProcessEvent default case)
1008     if ( s_inOnIdle )
1009         return;
1010
1011     s_inOnIdle = TRUE;
1012
1013     // 'Garbage' collection of windows deleted with Close().
1014     DeletePendingObjects();
1015
1016 #if wxUSE_LOG
1017     // flush the logged messages if any
1018     wxLog *pLog = wxLog::GetActiveTarget();
1019     if ( pLog != NULL && pLog->HasPendingMessages() )
1020         pLog->Flush();
1021 #endif // wxUSE_LOG
1022
1023     // Send OnIdle events to all windows
1024     if ( SendIdleEvents() )
1025     {
1026         // SendIdleEvents() returns TRUE if at least one window requested more
1027         // idle events
1028         event.RequestMore(TRUE);
1029     }
1030
1031     // If they are pending events, we must process them: pending events are
1032     // either events to the threads other than main or events posted with
1033     // wxPostEvent() functions
1034     ProcessPendingEvents();
1035
1036     s_inOnIdle = FALSE;
1037 }
1038
1039 // Send idle event to all top-level windows
1040 bool wxApp::SendIdleEvents()
1041 {
1042     bool needMore = FALSE;
1043
1044     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1045     while (node)
1046     {
1047         wxWindow* win = node->GetData();
1048         if (SendIdleEvents(win))
1049             needMore = TRUE;
1050         node = node->GetNext();
1051     }
1052
1053     return needMore;
1054 }
1055
1056 // Send idle event to window and all subwindows
1057 bool wxApp::SendIdleEvents(wxWindow* win)
1058 {
1059     bool needMore = FALSE;
1060
1061     wxIdleEvent event;
1062     event.SetEventObject(win);
1063     win->GetEventHandler()->ProcessEvent(event);
1064
1065     if (event.MoreRequested())
1066         needMore = TRUE;
1067
1068     wxNode* node = win->GetChildren().First();
1069     while (node)
1070     {
1071         wxWindow* win = (wxWindow*) node->Data();
1072         if (SendIdleEvents(win))
1073             needMore = TRUE;
1074
1075         node = node->Next();
1076     }
1077     return needMore;
1078 }
1079
1080 void wxApp::DeletePendingObjects()
1081 {
1082     wxNode *node = wxPendingDelete.First();
1083     while (node)
1084     {
1085         wxObject *obj = (wxObject *)node->Data();
1086
1087         delete obj;
1088
1089         if (wxPendingDelete.Member(obj))
1090             delete node;
1091
1092         // Deleting one object may have deleted other pending
1093         // objects, so start from beginning of list again.
1094         node = wxPendingDelete.First();
1095     }
1096 }
1097
1098 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1099 {
1100     if (GetTopWindow())
1101         GetTopWindow()->Close(TRUE);
1102 }
1103
1104 // Default behaviour: close the application with prompts. The
1105 // user can veto the close, and therefore the end session.
1106 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1107 {
1108     if (GetTopWindow())
1109     {
1110         if (!GetTopWindow()->Close(!event.CanVeto()))
1111             event.Veto(TRUE);
1112     }
1113 }
1114
1115 #if wxUSE_RICHEDIT
1116
1117 /* static */
1118 bool wxApp::InitRichEdit(int version)
1119 {
1120     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1121                  _T("incorrect richedit control version requested") );
1122
1123     if ( version <= gs_verRichEdit )
1124     {
1125         // we've already got this or better
1126         return TRUE;
1127     }
1128
1129     if ( gs_hRichEdit )
1130     {
1131         ::FreeLibrary(gs_hRichEdit);
1132     }
1133
1134     // always try load riched20.dll first - like this we won't have to reload
1135     // it later if we're first asked for RE 1 and then for RE 2 or 3
1136     wxString dllname = _T("riched20.dll");
1137     gs_hRichEdit = ::LoadLibrary(dllname);
1138     if ( !gs_hRichEdit && (version == 1) )
1139     {
1140         // fall back to RE 1
1141         dllname = _T("riched32.dll");
1142         gs_hRichEdit = ::LoadLibrary(dllname);
1143     }
1144
1145     if ( !gs_hRichEdit )
1146     {
1147         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1148
1149         gs_verRichEdit = -1;
1150
1151         return FALSE;
1152     }
1153
1154     gs_verRichEdit = version;
1155
1156     return TRUE;
1157 }
1158
1159 #endif // wxUSE_RICHEDIT
1160
1161 /* static */
1162 int wxApp::GetComCtl32Version()
1163 {
1164     // cache the result
1165     static int s_verComCtl32 = -1;
1166
1167     wxCRIT_SECT_DECLARE(csComCtl32);
1168     wxCRIT_SECT_LOCKER(lock, csComCtl32);
1169
1170     if ( s_verComCtl32 == -1 )
1171     {
1172         // initally assume no comctl32.dll at all
1173         s_verComCtl32 = 0;
1174
1175         // do we have it?
1176         HMODULE hModuleComCtl32 = ::GetModuleHandle(wxT("COMCTL32"));
1177
1178         // if so, then we can check for the version
1179         if ( hModuleComCtl32 )
1180         {
1181             // try to use DllGetVersion() if available in _headers_
1182             #ifdef DLLVER_PLATFORM_WINDOWS // defined in shlwapi.h
1183                 DLLGETVERSIONPROC pfnDllGetVersion = (DLLGETVERSIONPROC)
1184                     ::GetProcAddress(hModuleComCtl32, _T("DllGetVersion"));
1185                 if ( pfnDllGetVersion )
1186                 {
1187                     DLLVERSIONINFO dvi;
1188                     dvi.cbSize = sizeof(dvi);
1189
1190                     HRESULT hr = (*pfnDllGetVersion)(&dvi);
1191                     if ( FAILED(hr) )
1192                     {
1193                         wxLogApiError(_T("DllGetVersion"), hr);
1194                     }
1195                     else
1196                     {
1197                         // this is incompatible with _WIN32_IE values, but
1198                         // compatible with the other values returned by
1199                         // GetComCtl32Version()
1200                         s_verComCtl32 = 100*dvi.dwMajorVersion +
1201                                             dvi.dwMinorVersion;
1202                     }
1203                 }
1204             #endif
1205                 // DllGetVersion() unavailable either during compile or
1206                 // run-time, try to guess the version otherwise
1207                 if ( !s_verComCtl32 )
1208                 {
1209                     // InitCommonControlsEx is unique to 4.70 and later
1210                     FARPROC theProc = ::GetProcAddress
1211                                         (
1212                                          hModuleComCtl32,
1213                                          _T("InitCommonControlsEx")
1214                                         );
1215
1216                     if ( !theProc )
1217                     {
1218                         // not found, must be 4.00
1219                         s_verComCtl32 = 400;
1220                     }
1221                     else
1222                     {
1223                         // many symbols appeared in comctl32 4.71, could use
1224                         // any of them except may be DllInstall
1225                         theProc = ::GetProcAddress
1226                                     (
1227                                      hModuleComCtl32,
1228                                      _T("InitializeFlatSB")
1229                                     );
1230                         if ( !theProc )
1231                         {
1232                             // not found, must be 4.70
1233                             s_verComCtl32 = 470;
1234                         }
1235                         else
1236                         {
1237                             // found, must be 4.71
1238                             s_verComCtl32 = 471;
1239                         }
1240                     }
1241                 }
1242         }
1243     }
1244
1245     return s_verComCtl32;
1246 }
1247
1248 void wxExit()
1249 {
1250     wxLogError(_("Fatal error: exiting"));
1251
1252     wxApp::CleanUp();
1253 }
1254
1255 // Yield to incoming messages
1256 bool wxYield()
1257 {
1258     // we don't want to process WM_QUIT from here - it should be processed in
1259     // the main event loop in order to stop it
1260
1261     MSG msg;
1262     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
1263             msg.message != WM_QUIT )
1264     {
1265         if ( !wxTheApp->DoMessage() )
1266             break;
1267     }
1268
1269     // If they are pending events, we must process them.
1270     wxTheApp->ProcessPendingEvents();
1271
1272     return TRUE;
1273 }
1274
1275 //-----------------------------------------------------------------------------
1276 // wxWakeUpIdle
1277 //-----------------------------------------------------------------------------
1278
1279 void wxWakeUpIdle()
1280 {
1281     // Send the top window a dummy message so idle handler processing will
1282     // start up again.  Doing it this way ensures that the idle handler
1283     // wakes up in the right thread (see also wxWakeUpMainThread() which does
1284     // the same for the main app thread only)
1285     wxWindow *topWindow = wxTheApp->GetTopWindow();
1286     if ( topWindow )
1287     {
1288         if ( !::PostMessage(GetHwndOf(topWindow), WM_NULL, 0, 0) )
1289         {
1290             // should never happen
1291             wxLogLastError("PostMessage(WM_NULL)");
1292         }
1293     }
1294 }
1295
1296 //-----------------------------------------------------------------------------
1297
1298 wxIcon
1299 wxApp::GetStdIcon(int which) const
1300 {
1301     switch(which)
1302     {
1303         case wxICON_INFORMATION:
1304             return wxIcon("wxICON_INFO");
1305
1306         case wxICON_QUESTION:
1307             return wxIcon("wxICON_QUESTION");
1308
1309         case wxICON_EXCLAMATION:
1310             return wxIcon("wxICON_WARNING");
1311
1312         default:
1313             wxFAIL_MSG(wxT("requested non existent standard icon"));
1314             // still fall through
1315
1316         case wxICON_HAND:
1317             return wxIcon("wxICON_ERROR");
1318     }
1319 }
1320
1321 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1322 // if in a separate file. So include it here to ensure it's linked.
1323 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
1324 #include "main.cpp"
1325 #endif