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 #endif
  89
  90 #include "wx/msw/msvcrt.h"
  91
  92 // ----------------------------------------------------------------------------
  93 // conditional compilation
  94 // ----------------------------------------------------------------------------
  95
  96 // The macro _WIN32_IE is defined by commctrl.h (unless it had already been
  97 // defined before) and shows us what common control features are available
  98 // during the compile time (it doesn't mean that they will be available during
  99 // the run-time, use GetComCtl32Version() to test for them!). The possible
 100 // values are:
 101 //
 102 // 0x0200     for comctl32.dll 4.00 shipped with Win95/NT 4.0
 103 // 0x0300                      4.70              IE 3.x
 104 // 0x0400                      4.71              IE 4.0
 105 // 0x0401                      4.72              IE 4.01 and Win98
 106 // 0x0500                      5.00              IE 5.x and NT 5.0 (Win2000)
 107
 108 #ifndef _WIN32_IE
 109     // minimal set of features by default
 110     #define _WIN32_IE 0x0200
 111 #endif
 112
 113 #if _WIN32_IE >= 0x0300
 114     #include <shlwapi.h>
 115 #endif
 116
 117 // ---------------------------------------------------------------------------
 118 // global variables
 119 // ---------------------------------------------------------------------------
 120
 121 extern wxChar *wxBuffer;
 122 extern wxChar *wxOsVersion;
 123 extern wxList *wxWinHandleList;
 124 extern wxList WXDLLEXPORT wxPendingDelete;
 125 extern void wxSetKeyboardHook(bool doIt);
 126 extern wxCursor *g_globalCursor;
 127
 128 MSG s_currentMsg;
 129 wxApp *wxTheApp = NULL;
 130
 131 // NB: all "NoRedraw" classes must have the same names as the "normal" classes
 132 //     with NR suffix - wxWindow::MSWCreate() supposes this
 133 const wxChar *wxFrameClassName         = wxT("wxFrameClass");
 134 const wxChar *wxFrameClassNameNoRedraw = wxT("wxFrameClassNR");
 135 const wxChar *wxMDIFrameClassName      = wxT("wxMDIFrameClass");
 136 const wxChar *wxMDIFrameClassNameNoRedraw = wxT("wxMDIFrameClassNR");
 137 const wxChar *wxMDIChildFrameClassName = wxT("wxMDIChildFrameClass");
 138 const wxChar *wxMDIChildFrameClassNameNoRedraw = wxT("wxMDIChildFrameClassNR");
 139 const wxChar *wxPanelClassName         = wxT("wxPanelClass");
 140 const wxChar *wxCanvasClassName        = wxT("wxCanvasClass");
 141
 142 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 143 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 144 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 145
 146 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 147 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 148 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 149
 150 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 151
 152 LRESULT WXDLLEXPORT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 153
 154 #if wxUSE_RICHEDIT
 155     // the handle to richedit DLL and the version of the DLL loaded
 156     static HINSTANCE gs_hRichEdit = (HINSTANCE)NULL;
 157     static int gs_verRichEdit = -1;
 158 #endif
 159
 160 // ===========================================================================
 161 // implementation
 162 // ===========================================================================
 163
 164 // ---------------------------------------------------------------------------
 165 // wxApp
 166 // ---------------------------------------------------------------------------
 167
 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
 176 //// Initialize
 177 bool wxApp::Initialize()
 178 {
 179     // Some people may wish to use this, but
 180     // probably it shouldn't be here by default.
 181 #ifdef __WXDEBUG__
 182     //    wxRedirectIOToConsole();
 183 #endif
 184
 185     wxBuffer = new wxChar[1500]; // FIXME
 186
 187     wxClassInfo::InitializeClasses();
 188
 189 #if wxUSE_RESOURCES
 190     wxGetResource(wxT("wxWindows"), wxT("OsVersion"), &wxOsVersion);
 191 #endif
 192
 193 #if wxUSE_THREADS
 194     wxPendingEventsLocker = new wxCriticalSection;
 195 #endif
 196
 197     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 198     wxTheColourDatabase->Initialize();
 199
 200     wxInitializeStockLists();
 201     wxInitializeStockObjects();
 202
 203 #if wxUSE_WX_RESOURCES
 204     wxInitializeResourceSystem();
 205 #endif
 206
 207     wxBitmap::InitStandardHandlers();
 208
 209 #if defined(__WIN95__)
 210     InitCommonControls();
 211
 212 #endif // __WIN95__
 213
 214 #if wxUSE_OLE
 215
 216 #ifdef __WIN16__
 217     // for OLE, enlarge message queue to be as large as possible
 218     int iMsg = 96;
 219     while (!SetMessageQueue(iMsg) && (iMsg -= 8))
 220         ;
 221 #endif // Win16
 222     // we need to initialize OLE library
 223     if ( FAILED(::OleInitialize(NULL)) )
 224         wxLogError(_("Cannot initialize OLE"));
 225 #endif // wxUSE_OLE
 226
 227 #if wxUSE_CTL3D
 228     if (!Ctl3dRegister(wxhInstance))
 229         wxLogError(wxT("Cannot register CTL3D"));
 230
 231     Ctl3dAutoSubclass(wxhInstance);
 232 #endif
 233
 234     g_globalCursor = new wxCursor;
 235
 236     // VZ: these icons are not in wx.rc anyhow (but should they?)!
 237 #if 0
 238     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_FRAME"));
 239     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDIPARENTFRAME"));
 240     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxSTD_MDICHILDFRAME"));
 241
 242     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_FRAME"));
 243     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDIPARENTFRAME"));
 244     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, wxT("wxDEFAULT_MDICHILDFRAME"));
 245 #endif // 0
 246
 247     RegisterWindowClasses();
 248
 249     // Create the brush for disabling bitmap buttons
 250
 251     LOGBRUSH lb;
 252     lb.lbStyle = BS_PATTERN;
 253     lb.lbHatch = (int)LoadBitmap( wxhInstance, wxT("wxDISABLE_BUTTON_BITMAP") );
 254     if ( lb.lbHatch )
 255     {
 256         wxDisableButtonBrush = ::CreateBrushIndirect( & lb );
 257         ::DeleteObject( (HGDIOBJ)lb.lbHatch );
 258     }
 259     //else: wxWindows resources are probably not linked in
 260
 261 #if wxUSE_PENWINDOWS
 262     wxRegisterPenWin();
 263 #endif
 264
 265     wxWinHandleList = new wxList(wxKEY_INTEGER);
 266
 267     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 268     // PLEASE DO NOT ALTER THIS.
 269 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 270     extern char wxDummyChar;
 271     if (wxDummyChar) wxDummyChar++;
 272 #endif
 273
 274     wxSetKeyboardHook(TRUE);
 275
 276     wxModule::RegisterModules();
 277     if (!wxModule::InitializeModules())
 278         return FALSE;
 279     return TRUE;
 280 }
 281
 282 // ---------------------------------------------------------------------------
 283 // RegisterWindowClasses
 284 // ---------------------------------------------------------------------------
 285
 286 // TODO we should only register classes really used by the app. For this it
 287 //      would be enough to just delay the class registration until an attempt
 288 //      to create a window of this class is made.
 289 bool wxApp::RegisterWindowClasses()
 290 {
 291     WNDCLASS wndclass;
 292
 293     // for each class we register one with CS_(V|H)REDRAW style and one
 294     // without for windows created with wxNO_FULL_REDRAW_ON_REPAINT flag
 295     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
 296     static const long styleNoRedraw = CS_DBLCLKS;
 297
 298     // the fields which are common to all classes
 299     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 300     wndclass.cbClsExtra    = 0;
 301     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 302     wndclass.hInstance     = wxhInstance;
 303     wndclass.hIcon         = (HICON) NULL;
 304     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 305     wndclass.lpszMenuName  = NULL;
 306
 307     // Register the frame window class.
 308     wndclass.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
 309     wndclass.lpszClassName = wxFrameClassName;
 310     wndclass.style         = styleNormal;
 311
 312     if ( !RegisterClass(&wndclass) )
 313     {
 314         wxLogLastError("RegisterClass(frame)");
 315
 316         return FALSE;
 317     }
 318
 319     // "no redraw" frame
 320     wndclass.lpszClassName = wxFrameClassNameNoRedraw;
 321     wndclass.style         = styleNoRedraw;
 322
 323     if ( !RegisterClass(&wndclass) )
 324     {
 325         wxLogLastError("RegisterClass(no redraw frame)");
 326
 327         return FALSE;
 328     }
 329
 330     // Register the MDI frame window class.
 331     wndclass.hbrBackground = (HBRUSH)NULL; // paint MDI frame ourselves
 332     wndclass.lpszClassName = wxMDIFrameClassName;
 333     wndclass.style         = styleNormal;
 334
 335     if ( !RegisterClass(&wndclass) )
 336     {
 337         wxLogLastError("RegisterClass(MDI parent)");
 338
 339         return FALSE;
 340     }
 341
 342     // "no redraw" MDI frame
 343     wndclass.lpszClassName = wxMDIFrameClassNameNoRedraw;
 344     wndclass.style         = styleNoRedraw;
 345
 346     if ( !RegisterClass(&wndclass) )
 347     {
 348         wxLogLastError("RegisterClass(no redraw MDI parent frame)");
 349
 350         return FALSE;
 351     }
 352
 353     // Register the MDI child frame window class.
 354     wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 355     wndclass.lpszClassName = wxMDIChildFrameClassName;
 356     wndclass.style         = styleNormal;
 357
 358     if ( !RegisterClass(&wndclass) )
 359     {
 360         wxLogLastError("RegisterClass(MDI child)");
 361
 362         return FALSE;
 363     }
 364
 365     // "no redraw" MDI child frame
 366     wndclass.lpszClassName = wxMDIChildFrameClassNameNoRedraw;
 367     wndclass.style         = styleNoRedraw;
 368
 369     if ( !RegisterClass(&wndclass) )
 370     {
 371         wxLogLastError("RegisterClass(no redraw MDI child)");
 372
 373         return FALSE;
 374     }
 375
 376     // Register the panel window class.
 377     wndclass.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 378     wndclass.lpszClassName = wxPanelClassName;
 379     wndclass.style         = styleNormal;
 380
 381     if ( !RegisterClass(&wndclass) )
 382     {
 383         wxLogLastError("RegisterClass(panel)");
 384
 385         return FALSE;
 386     }
 387
 388     // Register the canvas and textsubwindow class name
 389     wndclass.hbrBackground = (HBRUSH)NULL;
 390     wndclass.lpszClassName = wxCanvasClassName;
 391
 392     if ( !RegisterClass(&wndclass) )
 393     {
 394         wxLogLastError("RegisterClass(canvas)");
 395
 396         return FALSE;
 397     }
 398
 399     return TRUE;
 400 }
 401
 402 // ---------------------------------------------------------------------------
 403 // Convert Windows to argc, argv style
 404 // ---------------------------------------------------------------------------
 405
 406 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 407 {
 408     wxStringList args;
 409
 410     wxString cmdLine(lpCmdLine);
 411     int count = 0;
 412
 413     // Get application name
 414     wxChar name[260]; // 260 is MAX_PATH value from windef.h
 415     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 416
 417     args.Add(name);
 418     count++;
 419
 420     wxStrcpy(name, wxFileNameFromPath(name));
 421     wxStripExtension(name);
 422     wxTheApp->SetAppName(name);
 423
 424     // Break up string
 425     // Treat strings enclosed in double-quotes as single arguments
 426     int i = 0;
 427     int len = cmdLine.Length();
 428     while (i < len)
 429     {
 430         // Skip whitespace
 431         while ((i < len) && wxIsspace(cmdLine.GetChar(i)))
 432             i ++;
 433
 434         if (i < len)
 435         {
 436             if (cmdLine.GetChar(i) == wxT('"')) // We found the start of a string
 437             {
 438                 i ++;
 439                 int first = i;
 440                 while ((i < len) && (cmdLine.GetChar(i) != wxT('"')))
 441                     i ++;
 442
 443                 wxString arg(cmdLine.Mid(first, (i - first)));
 444
 445                 args.Add(arg);
 446                 count ++;
 447
 448                 if (i < len)
 449                     i ++; // Skip past 2nd quote
 450             }
 451             else // Unquoted argument
 452             {
 453                 int first = i;
 454                 while ((i < len) && !wxIsspace(cmdLine.GetChar(i)))
 455                     i ++;
 456
 457                 wxString arg(cmdLine.Mid(first, (i - first)));
 458
 459                 args.Add(arg);
 460                 count ++;
 461             }
 462         }
 463     }
 464
 465     wxTheApp->argv = new wxChar*[count + 1];
 466     for (i = 0; i < count; i++)
 467     {
 468         wxString arg(args[i]);
 469         wxTheApp->argv[i] = copystring((const wxChar*)arg);
 470     }
 471     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 472     wxTheApp->argc = count;
 473 }
 474
 475 //// Cleans up any wxWindows internal structures left lying around
 476
 477 void wxApp::CleanUp()
 478 {
 479     //// COMMON CLEANUP
 480
 481 #if wxUSE_LOG
 482     // flush the logged messages if any and install a 'safer' log target: the
 483     // default one (wxLogGui) can't be used after the resources are freed just
 484     // below and the user suppliedo ne might be even more unsafe (using any
 485     // wxWindows GUI function is unsafe starting from now)
 486     wxLog::DontCreateOnDemand();
 487
 488     // this will flush the old messages if any
 489     delete wxLog::SetActiveTarget(new wxLogStderr);
 490 #endif // wxUSE_LOG
 491
 492     // One last chance for pending objects to be cleaned up
 493     wxTheApp->DeletePendingObjects();
 494
 495     wxModule::CleanUpModules();
 496
 497 #if wxUSE_WX_RESOURCES
 498     wxCleanUpResourceSystem();
 499
 500     //  wxDefaultResourceTable->ClearTable();
 501 #endif
 502
 503     // Indicate that the cursor can be freed, so that cursor won't be deleted
 504     // by deleting the bitmap list before g_globalCursor goes out of scope
 505     // (double deletion of the cursor).
 506     wxSetCursor(wxNullCursor);
 507     delete g_globalCursor;
 508     g_globalCursor = NULL;
 509
 510     wxDeleteStockObjects();
 511
 512     // Destroy all GDI lists, etc.
 513     wxDeleteStockLists();
 514
 515     delete wxTheColourDatabase;
 516     wxTheColourDatabase = NULL;
 517
 518     wxBitmap::CleanUpHandlers();
 519
 520     delete[] wxBuffer;
 521     wxBuffer = NULL;
 522
 523     //// WINDOWS-SPECIFIC CLEANUP
 524
 525     wxSetKeyboardHook(FALSE);
 526
 527 #if wxUSE_RICHEDIT
 528     if (gs_hRichEdit != (HINSTANCE) NULL)
 529         FreeLibrary(gs_hRichEdit);
 530 #endif
 531
 532 #if wxUSE_PENWINDOWS
 533     wxCleanUpPenWin();
 534 #endif
 535
 536     if (wxSTD_FRAME_ICON)
 537         DestroyIcon(wxSTD_FRAME_ICON);
 538     if (wxSTD_MDICHILDFRAME_ICON)
 539         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 540     if (wxSTD_MDIPARENTFRAME_ICON)
 541         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 542
 543     if (wxDEFAULT_FRAME_ICON)
 544         DestroyIcon(wxDEFAULT_FRAME_ICON);
 545     if (wxDEFAULT_MDICHILDFRAME_ICON)
 546         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 547     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 548         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 549
 550     if ( wxDisableButtonBrush )
 551         ::DeleteObject( wxDisableButtonBrush );
 552
 553 #if wxUSE_OLE
 554     ::OleUninitialize();
 555 #endif
 556
 557 #if wxUSE_CTL3D
 558     Ctl3dUnregister(wxhInstance);
 559 #endif
 560
 561     if (wxWinHandleList)
 562         delete wxWinHandleList;
 563
 564     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 565     // create a module for that as it's part of the core.
 566     delete wxPendingEvents;
 567 #if wxUSE_THREADS
 568     delete wxPendingEventsLocker;
 569     // If we don't do the following, we get an apparent memory leak.
 570     ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 571 #endif
 572
 573     wxClassInfo::CleanUpClasses();
 574
 575     delete wxTheApp;
 576     wxTheApp = NULL;
 577
 578 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 579     // At this point we want to check if there are any memory
 580     // blocks that aren't part of the wxDebugContext itself,
 581     // as a special case. Then when dumping we need to ignore
 582     // wxDebugContext, too.
 583     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 584     {
 585         wxLogDebug(wxT("There were memory leaks."));
 586         wxDebugContext::Dump();
 587         wxDebugContext::PrintStatistics();
 588     }
 589     //  wxDebugContext::SetStream(NULL, NULL);
 590 #endif
 591
 592 #if wxUSE_LOG
 593     // do it as the very last thing because everything else can log messages
 594     delete wxLog::SetActiveTarget(NULL);
 595 #endif // wxUSE_LOG
 596 }
 597
 598 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 599
 600 // temporarily disable this warning which would be generated in release builds
 601 // because of __try
 602 #ifdef __VISUALC__
 603     #pragma warning(disable: 4715) // not all control paths return a value
 604 #endif // Visual C++
 605
 606 //// Main wxWindows entry point
 607 int wxEntry(WXHINSTANCE hInstance,
 608             WXHINSTANCE WXUNUSED(hPrevInstance),
 609             char *lpCmdLine,
 610             int nCmdShow,
 611             bool enterLoop)
 612 {
 613     // do check for memory leaks on program exit
 614     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 615     //  deallocated memory which may be used to simulate low-memory condition)
 616     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 617 #ifdef __MWERKS__
 618 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 619     // This seems to be necessary since there are 'rogue'
 620     // objects present at this point (perhaps global objects?)
 621     // Setting a checkpoint will ignore them as far as the
 622     // memory checking facility is concerned.
 623     // Of course you may argue that memory allocated in globals should be
 624     // checked, but this is a reasonable compromise.
 625     wxDebugContext::SetCheckpoint();
 626 #endif
 627 #endif
 628     // take everything into a try-except block in release build
 629     // FIXME other compilers must support Win32 SEH (structured exception
 630     //       handling) too, just find the appropriate keyword in their docs!
 631     //       Please note that it's _not_ the same as C++ exceptions!
 632 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 633     #define CATCH_PROGRAM_EXCEPTIONS
 634
 635     __try {
 636 #else
 637     #undef  CATCH_PROGRAM_EXCEPTIONS
 638 #endif
 639         wxhInstance = (HINSTANCE) hInstance;
 640
 641         if (!wxApp::Initialize())
 642             return 0;
 643
 644         // create the application object or ensure that one already exists
 645         if (!wxTheApp)
 646         {
 647             // The app may have declared a global application object, but we recommend
 648             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 649             // function for delayed, dynamic app object construction.
 650             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 651                          wxT("No initializer - use IMPLEMENT_APP macro.") );
 652
 653             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 654         }
 655
 656         wxCHECK_MSG( wxTheApp, 0, wxT("You have to define an instance of wxApp!") );
 657
 658         // save the WinMain() parameters
 659         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 660         wxTheApp->m_nCmdShow = nCmdShow;
 661
 662         // GUI-specific initialisation. In fact on Windows we don't have any,
 663         // but this call is provided for compatibility across platforms.
 664         wxTheApp->OnInitGui();
 665
 666         // We really don't want timestamps by default, because it means
 667         // we can't simply double-click on the error message and get to that
 668         // line in the source. So VC++ at least, let's have a sensible default.
 669 #ifdef __VISUALC__
 670         wxLog::SetTimestamp(NULL);
 671 #endif
 672
 673         int retValue = 0;
 674
 675         if ( wxTheApp->OnInit() )
 676         {
 677             if ( enterLoop )
 678             {
 679                 retValue = wxTheApp->OnRun();
 680             }
 681             else
 682                 // We want to initialize, but not run or exit immediately.
 683                 return 1;
 684         }
 685         //else: app initialization failed, so we skipped OnRun()
 686
 687         wxWindow *topWindow = wxTheApp->GetTopWindow();
 688         if ( topWindow )
 689         {
 690             // Forcibly delete the window.
 691             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 692                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 693             {
 694                 topWindow->Close(TRUE);
 695                 wxTheApp->DeletePendingObjects();
 696             }
 697             else
 698             {
 699                 delete topWindow;
 700                 wxTheApp->SetTopWindow(NULL);
 701             }
 702         }
 703
 704         wxTheApp->OnExit();
 705
 706         wxApp::CleanUp();
 707
 708         return retValue;
 709
 710 #ifdef CATCH_PROGRAM_EXCEPTIONS
 711     }
 712     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 713         /*
 714            if ( wxTheApp )
 715            wxTheApp->OnFatalException();
 716          */
 717
 718         // using wxLog would be unsafe here
 719         ::MessageBox(NULL,
 720                      _("Unrecoverable program error detected: "
 721                      " the application will terminate."),
 722                      _("Fatal Error"),
 723                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 724
 725         ::ExitProcess(3); // the same exit code as abort()
 726
 727         // NOTREACHED
 728     }
 729 #endif // CATCH_PROGRAM_EXCEPTIONS
 730 }
 731
 732 // restore warning state
 733 #ifdef __VISUALC__
 734     #pragma warning(default: 4715) // not all control paths return a value
 735 #endif // Visual C++
 736
 737 #else /*  _WINDLL  */
 738
 739 //// Entry point for DLLs
 740
 741 int wxEntry(WXHINSTANCE hInstance)
 742 {
 743     wxhInstance = (HINSTANCE) hInstance;
 744     wxApp::Initialize();
 745
 746     // The app may have declared a global application object, but we recommend
 747     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 748     // for delayed, dynamic app object construction.
 749     if (!wxTheApp)
 750     {
 751         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 752                      "No initializer - use IMPLEMENT_APP macro." );
 753
 754         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 755     }
 756
 757     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 758
 759     wxTheApp->argc = 0;
 760     wxTheApp->argv = NULL;
 761
 762     wxTheApp->OnInitGui();
 763
 764     wxTheApp->OnInit();
 765
 766     wxWindow *topWindow = wxTheApp->GetTopWindow();
 767     if ( topWindow && topWindow->GetHWND())
 768     {
 769         topWindow->Show(TRUE);
 770     }
 771
 772     return 1;
 773 }
 774 #endif // _WINDLL
 775
 776 //// Static member initialization
 777
 778 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 779
 780 wxApp::wxApp()
 781 {
 782     m_topWindow = NULL;
 783     wxTheApp = this;
 784     m_wantDebugOutput = TRUE;
 785
 786     argc = 0;
 787     argv = NULL;
 788     m_printMode = wxPRINT_WINDOWS;
 789     m_exitOnFrameDelete = TRUE;
 790     m_auto3D = TRUE;
 791 }
 792
 793 wxApp::~wxApp()
 794 {
 795     // Delete command-line args
 796     int i;
 797     for (i = 0; i < argc; i++)
 798     {
 799         delete[] argv[i];
 800     }
 801     delete[] argv;
 802 }
 803
 804 bool wxApp::Initialized()
 805 {
 806 #ifndef _WINDLL
 807     if (GetTopWindow())
 808         return TRUE;
 809     else
 810         return FALSE;
 811 #endif
 812 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 813     return TRUE;
 814 #endif
 815 }
 816
 817 /*
 818  * Get and process a message, returning FALSE if WM_QUIT
 819  * received (and also set the flag telling the app to exit the main loop)
 820  *
 821  */
 822 bool wxApp::DoMessage()
 823 {
 824     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 825     if ( rc == 0 )
 826     {
 827         // got WM_QUIT
 828         m_keepGoing = FALSE;
 829
 830         return FALSE;
 831     }
 832     else if ( rc == -1 )
 833     {
 834         // should never happen, but let's test for it nevertheless
 835         wxLogLastError("GetMessage");
 836     }
 837     else
 838     {
 839 #if wxUSE_THREADS
 840         wxASSERT_MSG( wxThread::IsMain(),
 841                       wxT("only the main thread can process Windows messages") );
 842
 843         static bool s_hadGuiLock = TRUE;
 844         static wxMsgArray s_aSavedMessages;
 845
 846         // if a secondary thread owns is doing GUI calls, save all messages for
 847         // later processing - we can't process them right now because it will
 848         // lead to recursive library calls (and we're not reentrant)
 849         if ( !wxGuiOwnedByMainThread() )
 850         {
 851             s_hadGuiLock = FALSE;
 852
 853             // leave out WM_COMMAND messages: too dangerous, sometimes
 854             // the message will be processed twice
 855             if ( !wxIsWaitingForThread() ||
 856                     s_currentMsg.message != WM_COMMAND )
 857             {
 858                 s_aSavedMessages.Add(s_currentMsg);
 859             }
 860
 861             return TRUE;
 862         }
 863         else
 864         {
 865             // have we just regained the GUI lock? if so, post all of the saved
 866             // messages
 867             //
 868             // FIXME of course, it's not _exactly_ the same as processing the
 869             //       messages normally - expect some things to break...
 870             if ( !s_hadGuiLock )
 871             {
 872                 s_hadGuiLock = TRUE;
 873
 874                 size_t count = s_aSavedMessages.Count();
 875                 for ( size_t n = 0; n < count; n++ )
 876                 {
 877                     MSG& msg = s_aSavedMessages[n];
 878
 879                     if ( !ProcessMessage((WXMSG *)&msg) )
 880                     {
 881                         ::TranslateMessage(&msg);
 882                         ::DispatchMessage(&msg);
 883                     }
 884                 }
 885
 886                 s_aSavedMessages.Empty();
 887             }
 888         }
 889 #endif // wxUSE_THREADS
 890
 891         // Process the message
 892         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 893         {
 894             ::TranslateMessage(&s_currentMsg);
 895             ::DispatchMessage(&s_currentMsg);
 896         }
 897     }
 898
 899     return TRUE;
 900 }
 901
 902 /*
 903  * Keep trying to process messages until WM_QUIT
 904  * received.
 905  *
 906  * If there are messages to be processed, they will all be
 907  * processed and OnIdle will not be called.
 908  * When there are no more messages, OnIdle is called.
 909  * If OnIdle requests more time,
 910  * it will be repeatedly called so long as there are no pending messages.
 911  * A 'feature' of this is that once OnIdle has decided that no more processing
 912  * is required, then it won't get processing time until further messages
 913  * are processed (it'll sit in DoMessage).
 914  */
 915
 916 int wxApp::MainLoop()
 917 {
 918     m_keepGoing = TRUE;
 919
 920     while ( m_keepGoing )
 921     {
 922 #if wxUSE_THREADS
 923         wxMutexGuiLeaveOrEnter();
 924 #endif // wxUSE_THREADS
 925
 926         while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 927                 ProcessIdle() )
 928         {
 929         }
 930
 931
 932         DoMessage();
 933     }
 934
 935     return s_currentMsg.wParam;
 936 }
 937
 938 // Returns TRUE if more time is needed.
 939 bool wxApp::ProcessIdle()
 940 {
 941     wxIdleEvent event;
 942     event.SetEventObject(this);
 943     ProcessEvent(event);
 944
 945     return event.MoreRequested();
 946 }
 947
 948 void wxApp::ExitMainLoop()
 949 {
 950     m_keepGoing = FALSE;
 951 }
 952
 953 bool wxApp::Pending()
 954 {
 955     return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0);
 956 }
 957
 958 void wxApp::Dispatch()
 959 {
 960     DoMessage();
 961 }
 962
 963 /*
 964  * Give all windows a chance to preprocess
 965  * the message. Some may have accelerator tables, or have
 966  * MDI complications.
 967  */
 968
 969 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 970 {
 971     MSG *msg = (MSG *)wxmsg;
 972     HWND hWnd = msg->hwnd;
 973     wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
 974
 975     // for some composite controls (like a combobox), wndThis might be NULL
 976     // because the subcontrol is not a wxWindow, but only the control itself
 977     // is - try to catch this case
 978     while ( hWnd && !wndThis )
 979     {
 980         hWnd = ::GetParent(hWnd);
 981         wndThis = wxFindWinFromHandle((WXHWND)hWnd);
 982     }
 983
 984     // Try translations first; find the youngest window with
 985     // a translation table.
 986     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 987     {
 988         if ( wnd->MSWTranslateMessage(wxmsg) )
 989             return TRUE;
 990     }
 991
 992     // Anyone for a non-translation message? Try youngest descendants first.
 993     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 994     {
 995         if ( wnd->MSWProcessMessage(wxmsg) )
 996             return TRUE;
 997     }
 998
 999     return FALSE;
1000 }
1001
1002 void wxApp::OnIdle(wxIdleEvent& event)
1003 {
1004     static bool s_inOnIdle = FALSE;
1005
1006     // Avoid recursion (via ProcessEvent default case)
1007     if ( s_inOnIdle )
1008         return;
1009
1010     s_inOnIdle = TRUE;
1011
1012     // 'Garbage' collection of windows deleted with Close().
1013     DeletePendingObjects();
1014
1015 #if wxUSE_LOG
1016     // flush the logged messages if any
1017     wxLog *pLog = wxLog::GetActiveTarget();
1018     if ( pLog != NULL && pLog->HasPendingMessages() )
1019         pLog->Flush();
1020 #endif // wxUSE_LOG
1021
1022     // Send OnIdle events to all windows
1023     if ( SendIdleEvents() )
1024     {
1025         // SendIdleEvents() returns TRUE if at least one window requested more
1026         // idle events
1027         event.RequestMore(TRUE);
1028     }
1029
1030     // If they are pending events, we must process them: pending events are
1031     // either events to the threads other than main or events posted with
1032     // wxPostEvent() functions
1033     ProcessPendingEvents();
1034
1035     s_inOnIdle = FALSE;
1036 }
1037
1038 // Send idle event to all top-level windows
1039 bool wxApp::SendIdleEvents()
1040 {
1041     bool needMore = FALSE;
1042
1043     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
1044     while (node)
1045     {
1046         wxWindow* win = node->GetData();
1047         if (SendIdleEvents(win))
1048             needMore = TRUE;
1049         node = node->GetNext();
1050     }
1051
1052     return needMore;
1053 }
1054
1055 // Send idle event to window and all subwindows
1056 bool wxApp::SendIdleEvents(wxWindow* win)
1057 {
1058     bool needMore = FALSE;
1059
1060     wxIdleEvent event;
1061     event.SetEventObject(win);
1062     win->GetEventHandler()->ProcessEvent(event);
1063
1064     if (event.MoreRequested())
1065         needMore = TRUE;
1066
1067     wxNode* node = win->GetChildren().First();
1068     while (node)
1069     {
1070         wxWindow* win = (wxWindow*) node->Data();
1071         if (SendIdleEvents(win))
1072             needMore = TRUE;
1073
1074         node = node->Next();
1075     }
1076     return needMore;
1077 }
1078
1079 void wxApp::DeletePendingObjects()
1080 {
1081     wxNode *node = wxPendingDelete.First();
1082     while (node)
1083     {
1084         wxObject *obj = (wxObject *)node->Data();
1085
1086         delete obj;
1087
1088         if (wxPendingDelete.Member(obj))
1089             delete node;
1090
1091         // Deleting one object may have deleted other pending
1092         // objects, so start from beginning of list again.
1093         node = wxPendingDelete.First();
1094     }
1095 }
1096
1097 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1098 {
1099     if (GetTopWindow())
1100         GetTopWindow()->Close(TRUE);
1101 }
1102
1103 // Default behaviour: close the application with prompts. The
1104 // user can veto the close, and therefore the end session.
1105 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1106 {
1107     if (GetTopWindow())
1108     {
1109         if (!GetTopWindow()->Close(!event.CanVeto()))
1110             event.Veto(TRUE);
1111     }
1112 }
1113
1114 #if wxUSE_RICHEDIT
1115
1116 /* static */
1117 bool wxApp::InitRichEdit(int version)
1118 {
1119     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1120                  _T("incorrect richedit control version requested") );
1121
1122     if ( version <= gs_verRichEdit )
1123     {
1124         // we've already got this or better
1125         return TRUE;
1126     }
1127
1128     if ( gs_hRichEdit )
1129     {
1130         ::FreeLibrary(gs_hRichEdit);
1131     }
1132
1133     // always try load riched20.dll first - like this we won't have to reload
1134     // it later if we're first asked for RE 1 and then for RE 2 or 3
1135     wxString dllname = _T("riched20.dll");
1136     gs_hRichEdit = ::LoadLibrary(dllname);
1137     if ( !gs_hRichEdit && (version == 1) )
1138     {
1139         // fall back to RE 1
1140         dllname = _T("riched32.dll");
1141         gs_hRichEdit = ::LoadLibrary(dllname);
1142     }
1143
1144     if ( !gs_hRichEdit )
1145     {
1146         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1147
1148         gs_verRichEdit = -1;
1149
1150         return FALSE;
1151     }
1152
1153     gs_verRichEdit = version;
1154
1155     return TRUE;
1156 }
1157
1158 #endif // wxUSE_RICHEDIT
1159
1160 /* static */
1161 int wxApp::GetComCtl32Version()
1162 {
1163     // cache the result
1164     static int s_verComCtl32 = -1;
1165
1166     wxCRIT_SECT_DECLARE(csComCtl32);
1167     wxCRIT_SECT_LOCKER(lock, csComCtl32);
1168
1169     if ( s_verComCtl32 == -1 )
1170     {
1171         // initally assume no comctl32.dll at all
1172         s_verComCtl32 = 0;
1173
1174         // do we have it?
1175         HMODULE hModuleComCtl32 = ::GetModuleHandle(wxT("COMCTL32"));
1176
1177         // if so, then we can check for the version
1178         if ( hModuleComCtl32 )
1179         {
1180             // try to use DllGetVersion() if available in _headers_
1181             #ifdef DLLVER_PLATFORM_WINDOWS // defined in shlwapi.h
1182                 DLLGETVERSIONPROC pfnDllGetVersion = (DLLGETVERSIONPROC)
1183                     ::GetProcAddress(hModuleComCtl32, _T("DllGetVersion"));
1184                 if ( pfnDllGetVersion )
1185                 {
1186                     DLLVERSIONINFO dvi;
1187                     dvi.cbSize = sizeof(dvi);
1188
1189                     HRESULT hr = (*pfnDllGetVersion)(&dvi);
1190                     if ( FAILED(hr) )
1191                     {
1192                         wxLogApiError(_T("DllGetVersion"), hr);
1193                     }
1194                     else
1195                     {
1196                         // this is incompatible with _WIN32_IE values, but
1197                         // compatible with the other values returned by
1198                         // GetComCtl32Version()
1199                         s_verComCtl32 = 100*dvi.dwMajorVersion +
1200                                             dvi.dwMinorVersion;
1201                     }
1202                 }
1203             #endif
1204                 // DllGetVersion() unavailable either during compile or
1205                 // run-time, try to guess the version otherwise
1206                 if ( !s_verComCtl32 )
1207                 {
1208                     // InitCommonControlsEx is unique to 4.70 and later
1209                     FARPROC theProc = ::GetProcAddress
1210                                         (
1211                                          hModuleComCtl32,
1212                                          _T("InitCommonControlsEx")
1213                                         );
1214
1215                     if ( !theProc )
1216                     {
1217                         // not found, must be 4.00
1218                         s_verComCtl32 = 400;
1219                     }
1220                     else
1221                     {
1222                         // many symbols appeared in comctl32 4.71, could use
1223                         // any of them except may be DllInstall
1224                         theProc = ::GetProcAddress
1225                                     (
1226                                      hModuleComCtl32,
1227                                      _T("InitializeFlatSB")
1228                                     );
1229                         if ( !theProc )
1230                         {
1231                             // not found, must be 4.70
1232                             s_verComCtl32 = 470;
1233                         }
1234                         else
1235                         {
1236                             // found, must be 4.71
1237                             s_verComCtl32 = 471;
1238                         }
1239                     }
1240                 }
1241         }
1242     }
1243
1244     return s_verComCtl32;
1245 }
1246
1247 void wxExit()
1248 {
1249     wxLogError(_("Fatal error: exiting"));
1250
1251     wxApp::CleanUp();
1252 }
1253
1254 // Yield to incoming messages
1255 bool wxYield()
1256 {
1257     // we don't want to process WM_QUIT from here - it should be processed in
1258     // the main event loop in order to stop it
1259
1260     MSG msg;
1261     while ( PeekMessage(&msg, (HWND)0, 0, 0, PM_NOREMOVE) &&
1262             msg.message != WM_QUIT )
1263     {
1264         if ( !wxTheApp->DoMessage() )
1265             break;
1266     }
1267
1268     // If they are pending events, we must process them.
1269     wxTheApp->ProcessPendingEvents();
1270
1271     return TRUE;
1272 }
1273
1274 //-----------------------------------------------------------------------------
1275 // wxWakeUpIdle
1276 //-----------------------------------------------------------------------------
1277
1278 void wxWakeUpIdle()
1279 {
1280     // Send the top window a dummy message so idle handler processing will
1281     // start up again.  Doing it this way ensures that the idle handler
1282     // wakes up in the right thread (see also wxWakeUpMainThread() which does
1283     // the same for the main app thread only)
1284     wxWindow *topWindow = wxTheApp->GetTopWindow();
1285     if ( topWindow )
1286     {
1287         if ( !::PostMessage(GetHwndOf(topWindow), WM_NULL, 0, 0) )
1288         {
1289             // should never happen
1290             wxLogLastError("PostMessage(WM_NULL)");
1291         }
1292     }
1293 }
1294
1295 //-----------------------------------------------------------------------------
1296
1297 wxIcon
1298 wxApp::GetStdIcon(int which) const
1299 {
1300     switch(which)
1301     {
1302         case wxICON_INFORMATION:
1303             return wxIcon("wxICON_INFO");
1304
1305         case wxICON_QUESTION:
1306             return wxIcon("wxICON_QUESTION");
1307
1308         case wxICON_EXCLAMATION:
1309             return wxIcon("wxICON_WARNING");
1310
1311         default:
1312             wxFAIL_MSG(wxT("requested non existent standard icon"));
1313             // still fall through
1314
1315         case wxICON_HAND:
1316             return wxIcon("wxICON_ERROR");
1317     }
1318 }
1319
1320 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1321 // if in a separate file. So include it here to ensure it's linked.
1322 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
1323 #include "main.cpp"
1324 #endif