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 #endif
  47
  48 #include "wx/msw/private.h"
  49 #include "wx/log.h"
  50 #include "wx/module.h"
  51
  52 #if wxUSE_THREADS
  53     #include "wx/thread.h"
  54
  55     // define the array of MSG strutures
  56     WX_DECLARE_OBJARRAY(MSG, wxMsgArray);
  57
  58     #include "wx/arrimpl.cpp"
  59
  60     WX_DEFINE_OBJARRAY(wxMsgArray);
  61 #endif // wxUSE_THREADS
  62
  63 #if wxUSE_WX_RESOURCES
  64     #include "wx/resource.h"
  65 #endif
  66
  67 // OLE is used for drag-and-drop, clipboard, OLE Automation...
  68 #if defined(__GNUWIN32__) || defined(__SC__) || defined(__SALFORDC__)
  69     #undef wxUSE_OLE
  70
  71     #define  wxUSE_OLE 0
  72 #endif // broken compilers
  73
  74 #if wxUSE_OLE
  75     #include <ole2.h>
  76 #endif
  77
  78 #include <string.h>
  79 #include <ctype.h>
  80
  81 #if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__)
  82     #include <commctrl.h>
  83 #endif
  84
  85 #include "wx/msw/msvcrt.h"
  86
  87 // ---------------------------------------------------------------------------
  88 // global variables
  89 // ---------------------------------------------------------------------------
  90
  91 extern char *wxBuffer;
  92 extern char *wxOsVersion;
  93 extern wxList *wxWinHandleList;
  94 extern wxList WXDLLEXPORT wxPendingDelete;
  95 extern void wxSetKeyboardHook(bool doIt);
  96 extern wxCursor *g_globalCursor;
  97
  98 HINSTANCE wxhInstance = 0;
  99 static MSG s_currentMsg;
 100 wxApp *wxTheApp = NULL;
 101
 102 // FIXME why not const? and not static?
 103 char wxFrameClassName[]         = "wxFrameClass";
 104 char wxMDIFrameClassName[]      = "wxMDIFrameClass";
 105 char wxMDIChildFrameClassName[] = "wxMDIChildFrameClass";
 106 char wxPanelClassName[]         = "wxPanelClass";
 107 char wxCanvasClassName[]        = "wxCanvasClass";
 108
 109 HICON wxSTD_FRAME_ICON = (HICON) NULL;
 110 HICON wxSTD_MDICHILDFRAME_ICON = (HICON) NULL;
 111 HICON wxSTD_MDIPARENTFRAME_ICON = (HICON) NULL;
 112
 113 HICON wxDEFAULT_FRAME_ICON = (HICON) NULL;
 114 HICON wxDEFAULT_MDICHILDFRAME_ICON = (HICON) NULL;
 115 HICON wxDEFAULT_MDIPARENTFRAME_ICON = (HICON) NULL;
 116
 117 HBRUSH wxDisableButtonBrush = (HBRUSH) 0;
 118
 119 LRESULT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
 120
 121 #if defined(__WIN95__) && !defined(__TWIN32__)
 122     #define wxUSE_RICHEDIT 1
 123 #else
 124     #define wxUSE_RICHEDIT 0
 125 #endif
 126
 127 #if wxUSE_RICHEDIT
 128     static HINSTANCE gs_hRichEdit = (HINSTANCE) NULL;
 129 #endif
 130
 131 // ===========================================================================
 132 // implementation
 133 // ===========================================================================
 134
 135 // ---------------------------------------------------------------------------
 136 // wxApp
 137 // ---------------------------------------------------------------------------
 138
 139 #if !USE_SHARED_LIBRARY
 140     IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
 141
 142     BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 143         EVT_IDLE(wxApp::OnIdle)
 144         EVT_END_SESSION(wxApp::OnEndSession)
 145         EVT_QUERY_END_SESSION(wxApp::OnQueryEndSession)
 146     END_EVENT_TABLE()
 147 #endif
 148
 149 long wxApp::sm_lastMessageTime = 0;
 150
 151 //// Initialize
 152 bool wxApp::Initialize()
 153 {
 154     // Some people may wish to use this, but
 155     // probably it shouldn't be here by default.
 156 #ifdef __WXDEBUG__
 157     //    wxRedirectIOToConsole();
 158 #endif
 159
 160     wxBuffer = new char[1500]; // FIXME
 161
 162     wxClassInfo::InitializeClasses();
 163
 164 #if wxUSE_RESOURCES
 165     wxGetResource("wxWindows", "OsVersion", &wxOsVersion);
 166 #endif
 167
 168     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 169     wxTheColourDatabase->Initialize();
 170
 171     wxInitializeStockLists();
 172     wxInitializeStockObjects();
 173
 174 #if wxUSE_WX_RESOURCES
 175     wxInitializeResourceSystem();
 176 #endif
 177
 178     wxBitmap::InitStandardHandlers();
 179
 180 #if defined(__WIN95__)
 181     InitCommonControls();
 182
 183 #if wxUSE_RICHEDIT
 184     gs_hRichEdit = LoadLibrary("RICHED32.DLL");
 185
 186     if (gs_hRichEdit == (HINSTANCE) NULL)
 187     {
 188         wxLogError(_("Could not initialise Rich Edit DLL"));
 189     }
 190 #endif // wxUSE_RICHEDIT
 191
 192 #endif // __WIN95__
 193
 194     // for OLE, enlarge message queue to be as large as possible
 195     int iMsg = 96;
 196     while (!SetMessageQueue(iMsg) && (iMsg -= 8));
 197
 198     /*
 199        DWORD dwOleVer;
 200        dwOleVer = CoBuildVersion();
 201
 202     // check the OLE library version
 203     if (rmm != HIWORD(dwOleVer))
 204     {
 205     wxMessageBox("Incorrect version of OLE libraries.");
 206     return FALSE;
 207     }
 208      */
 209
 210 #if wxUSE_OLE
 211     // we need to initialize OLE library
 212     if ( FAILED(::OleInitialize(NULL)) )
 213         wxLogError(_("Cannot initialize OLE"));
 214 #endif
 215
 216 #if wxUSE_CTL3D
 217     if (!Ctl3dRegister(wxhInstance))
 218         wxLogError("Cannot register CTL3D");
 219
 220     Ctl3dAutoSubclass(wxhInstance);
 221 #endif
 222
 223     g_globalCursor = new wxCursor;
 224
 225     wxSTD_FRAME_ICON = LoadIcon(wxhInstance, "wxSTD_FRAME");
 226     wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, "wxSTD_MDIPARENTFRAME");
 227     wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, "wxSTD_MDICHILDFRAME");
 228
 229     wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_FRAME");
 230     wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_MDIPARENTFRAME");
 231     wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_MDICHILDFRAME");
 232
 233     RegisterWindowClasses();
 234
 235     // Create the brush for disabling bitmap buttons
 236
 237     LOGBRUSH lb ;
 238     lb.lbStyle = BS_PATTERN;
 239     lb.lbHatch = (int)LoadBitmap( wxhInstance, "wxDISABLE_BUTTON_BITMAP" ) ;
 240     wxDisableButtonBrush = ::CreateBrushIndirect( & lb ) ;
 241     ::DeleteObject( (HGDIOBJ)lb.lbHatch ) ;
 242
 243 #if wxUSE_PENWINDOWS
 244     wxRegisterPenWin();
 245 #endif
 246
 247     wxWinHandleList = new wxList(wxKEY_INTEGER);
 248
 249     // This is to foil optimizations in Visual C++ that throw out dummy.obj.
 250     // PLEASE DO NOT ALTER THIS.
 251 #if defined(__VISUALC__) && !defined(WXMAKINGDLL)
 252     extern char wxDummyChar;
 253     if (wxDummyChar) wxDummyChar++;
 254 #endif
 255
 256     wxSetKeyboardHook(TRUE);
 257
 258     wxModule::RegisterModules();
 259     if (!wxModule::InitializeModules())
 260         return FALSE;
 261     return TRUE;
 262 }
 263
 264 //// RegisterWindowClasses
 265
 266 bool wxApp::RegisterWindowClasses()
 267 {
 268     ///////////////////////////////////////////////////////////////////////
 269     // Register the frame window class.
 270     WNDCLASS wndclass;   // Structure used to register Windows class.
 271
 272     wndclass.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS ;
 273     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 274     wndclass.cbClsExtra    = 0;
 275     wndclass.cbWndExtra    = sizeof( DWORD ); // was 4
 276     wndclass.hInstance     = wxhInstance;
 277     wndclass.hIcon         = (HICON) NULL;        // wxSTD_FRAME_ICON;
 278     wndclass.hCursor       = LoadCursor( (HINSTANCE) NULL, IDC_ARROW );
 279     wndclass.hbrBackground =  (HBRUSH)(COLOR_APPWORKSPACE+1) ;
 280     //  wndclass.hbrBackground = GetStockObject( WHITE_BRUSH );
 281     wndclass.lpszMenuName  = NULL;
 282 #ifdef _MULTIPLE_INSTANCES
 283     sprintf( wxFrameClassName,"wxFrameClass%d", wxhInstance );
 284 #endif
 285     wndclass.lpszClassName = wxFrameClassName;
 286
 287     if (!RegisterClass( &wndclass ))
 288     {
 289         // wxFatalError("Can't register Frame Window class");
 290     }
 291
 292     ///////////////////////////////////////////////////////////////////////
 293     // Register the MDI frame window class.
 294     WNDCLASS wndclass1;   // Structure used to register Windows class.
 295
 296     wndclass1.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS ;
 297     wndclass1.lpfnWndProc   = (WNDPROC)wxWndProc;
 298     wndclass1.cbClsExtra    = 0;
 299     wndclass1.cbWndExtra    = sizeof( DWORD ); // was 4
 300     wndclass1.hInstance     = wxhInstance;
 301     wndclass1.hIcon         = (HICON) NULL; // wxSTD_MDIPARENTFRAME_ICON;
 302     wndclass1.hCursor       = LoadCursor( (HINSTANCE) NULL, IDC_ARROW );
 303     //  wndclass1.hbrBackground =  (HBRUSH)(COLOR_APPWORKSPACE+1) ;
 304     wndclass1.hbrBackground = (HBRUSH) NULL;
 305     wndclass1.lpszMenuName  = NULL;
 306
 307     wndclass1.lpszClassName = wxMDIFrameClassName;
 308     if (!RegisterClass( &wndclass1 ))
 309     {
 310         //    wxFatalError("Can't register MDI Frame window class");
 311         //  return FALSE;
 312     }
 313
 314     ///////////////////////////////////////////////////////////////////////
 315     // Register the MDI child frame window class.
 316     WNDCLASS wndclass4;   // Structure used to register Windows class.
 317
 318     wndclass4.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS ;
 319     wndclass4.lpfnWndProc   = (WNDPROC)wxWndProc;
 320     wndclass4.cbClsExtra    = 0;
 321     wndclass4.cbWndExtra    = sizeof( DWORD ); // was 4
 322     wndclass4.hInstance     = wxhInstance;
 323     wndclass4.hIcon         = (HICON) NULL;       // wxSTD_MDICHILDFRAME_ICON;
 324     wndclass4.hCursor       = LoadCursor( (HINSTANCE) NULL, IDC_ARROW );
 325     // TODO: perhaps this should be NULL so that Windows doesn't
 326     // paint the background itself (would OnEraseBackground duplicate
 327     // this?)
 328     wndclass4.hbrBackground =  (HBRUSH)(COLOR_WINDOW+1) ;
 329     //  wndclass4.hbrBackground = NULL;
 330     wndclass4.lpszMenuName  = NULL;
 331     wndclass4.lpszClassName = wxMDIChildFrameClassName;
 332
 333     if (!RegisterClass( &wndclass4 ))
 334     {
 335         //   wxFatalError("Can't register MDI child frame window class");
 336         //   return FALSE;
 337     }
 338
 339     ///////////////////////////////////////////////////////////////////////
 340     // Register the panel window class.
 341     WNDCLASS wndclass2;   // Structure used to register Windows class.
 342     memset(&wndclass2, 0, sizeof(WNDCLASS));   // start with NULL defaults
 343     wndclass2.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS ;
 344     wndclass2.lpfnWndProc   = (WNDPROC)wxWndProc;
 345     wndclass2.cbClsExtra    = 0;
 346     wndclass2.cbWndExtra    = sizeof( DWORD ); // was 4
 347     wndclass2.hInstance     = wxhInstance;
 348     wndclass2.hIcon         = (HICON) NULL;
 349     wndclass2.hCursor       = LoadCursor( (HINSTANCE) NULL, IDC_ARROW );
 350     //  wndclass2.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1) ;
 351     wndclass2.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 352     wndclass2.lpszMenuName  = NULL;
 353     wndclass2.lpszClassName = wxPanelClassName;
 354     if (!RegisterClass( &wndclass2 ))
 355     {
 356         //   wxFatalError("Can't register Panel Window class");
 357         //   return FALSE;
 358     }
 359
 360     ///////////////////////////////////////////////////////////////////////
 361     // Register the canvas and textsubwindow class name
 362     WNDCLASS wndclass3;   // Structure used to register Windows class.
 363     memset(&wndclass3, 0, sizeof(WNDCLASS));   // start with NULL defaults
 364     // Use CS_OWNDC to avoid messing about restoring the context
 365     // for every graphic operation.
 366     //  wndclass3.style         = CS_HREDRAW | CS_VREDRAW | CS_OWNDC | CS_DBLCLKS ;
 367     // wxWin 2.0
 368     wndclass3.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS ;
 369     wndclass3.lpfnWndProc   = (WNDPROC)wxWndProc;
 370     wndclass3.cbClsExtra    = 0;
 371     wndclass3.cbWndExtra    = sizeof( DWORD ); // was 4
 372     wndclass3.hInstance     = wxhInstance;
 373     wndclass3.hIcon         = (HICON) NULL;
 374     wndclass3.hCursor       = LoadCursor( (HINSTANCE) NULL, IDC_ARROW );
 375     //  wndclass3.hbrBackground = (HBRUSH)(COLOR_WINDOW+1) ;
 376     wndclass3.hbrBackground = (HBRUSH) NULL;
 377     wndclass3.lpszMenuName  = NULL;
 378     wndclass3.lpszClassName = wxCanvasClassName;
 379     if (!RegisterClass( &wndclass3))
 380     {
 381         //   wxFatalError("Can't register Canvas class");
 382         //   return FALSE;
 383     }
 384
 385     return TRUE;
 386 }
 387
 388 //// Convert Windows to argc, argv style
 389
 390 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 391 {
 392     wxStringList args;
 393
 394     wxString cmdLine(lpCmdLine);
 395     int count = 0;
 396
 397     // Get application name
 398     char name[260]; // 260 is MAX_PATH value from windef.h
 399     ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 400
 401     args.Add(name);
 402     count++;
 403
 404     strcpy(name, wxFileNameFromPath(name));
 405     wxStripExtension(name);
 406     wxTheApp->SetAppName(name);
 407
 408     // Break up string
 409     // Treat strings enclosed in double-quotes as single arguments
 410     int i = 0;
 411     int len = cmdLine.Length();
 412     while (i < len)
 413     {
 414         // Skip whitespace
 415         while ((i < len) && isspace(cmdLine.GetChar(i)))
 416             i ++;
 417
 418         if (i < len)
 419         {
 420             if (cmdLine.GetChar(i) == '"') // We found the start of a string
 421             {
 422                 i ++;
 423                 int first = i;
 424                 while ((i < len) && (cmdLine.GetChar(i) != '"'))
 425                     i ++;
 426
 427                 wxString arg(cmdLine.Mid(first, (i - first)));
 428
 429                 args.Add(arg);
 430                 count ++;
 431
 432                 if (i < len)
 433                     i ++; // Skip past 2nd quote
 434             }
 435             else // Unquoted argument
 436             {
 437                 int first = i;
 438                 while ((i < len) && !isspace(cmdLine.GetChar(i)))
 439                     i ++;
 440
 441                 wxString arg(cmdLine.Mid(first, (i - first)));
 442
 443                 args.Add(arg);
 444                 count ++;
 445             }
 446         }
 447     }
 448
 449     wxTheApp->argv = new char*[count + 1];
 450     for (i = 0; i < count; i++)
 451     {
 452         wxString arg(args[i]);
 453         wxTheApp->argv[i] = copystring((const char*)arg);
 454     }
 455     wxTheApp->argv[count] = NULL; // argv[] is a NULL-terminated list
 456     wxTheApp->argc = count;
 457 }
 458
 459 //// Cleans up any wxWindows internal structures left lying around
 460
 461 void wxApp::CleanUp()
 462 {
 463     //// COMMON CLEANUP
 464
 465     // flush the logged messages if any and install a 'safer' log target: the
 466     // default one (wxLogGui) can't be used after the resources are freed just
 467     // below and the user suppliedo ne might be even more unsafe (using any
 468     // wxWindows GUI function is unsafe starting from now)
 469     wxLog::DontCreateOnDemand();
 470
 471     // this will flush the old messages if any
 472     delete wxLog::SetActiveTarget(new wxLogStderr);
 473
 474     // One last chance for pending objects to be cleaned up
 475     wxTheApp->DeletePendingObjects();
 476
 477     wxModule::CleanUpModules();
 478
 479 #if wxUSE_WX_RESOURCES
 480     wxCleanUpResourceSystem();
 481
 482     //  wxDefaultResourceTable->ClearTable();
 483 #endif
 484
 485     // Indicate that the cursor can be freed, so that cursor won't be deleted
 486     // by deleting the bitmap list before g_globalCursor goes out of scope
 487     // (double deletion of the cursor).
 488     wxSetCursor(wxNullCursor);
 489     delete g_globalCursor;
 490     g_globalCursor = NULL;
 491
 492     wxDeleteStockObjects() ;
 493
 494     // Destroy all GDI lists, etc.
 495     wxDeleteStockLists();
 496
 497     delete wxTheColourDatabase;
 498     wxTheColourDatabase = NULL;
 499
 500     wxBitmap::CleanUpHandlers();
 501
 502     delete[] wxBuffer;
 503     wxBuffer = NULL;
 504
 505     //// WINDOWS-SPECIFIC CLEANUP
 506
 507     wxSetKeyboardHook(FALSE);
 508
 509 #ifdef __WIN95__
 510
 511 #if wxUSE_RICHEDIT
 512     if (gs_hRichEdit != (HINSTANCE) NULL)
 513         FreeLibrary(gs_hRichEdit);
 514 #endif
 515
 516 #endif
 517
 518 #if wxUSE_PENWINDOWS
 519     wxCleanUpPenWin();
 520 #endif
 521
 522     if (wxSTD_FRAME_ICON)
 523         DestroyIcon(wxSTD_FRAME_ICON);
 524     if (wxSTD_MDICHILDFRAME_ICON)
 525         DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 526     if (wxSTD_MDIPARENTFRAME_ICON)
 527         DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 528
 529     if (wxDEFAULT_FRAME_ICON)
 530         DestroyIcon(wxDEFAULT_FRAME_ICON);
 531     if (wxDEFAULT_MDICHILDFRAME_ICON)
 532         DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 533     if (wxDEFAULT_MDIPARENTFRAME_ICON)
 534         DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 535
 536     if ( wxDisableButtonBrush )
 537         ::DeleteObject( wxDisableButtonBrush ) ;
 538
 539 #if wxUSE_OLE
 540     ::OleUninitialize();
 541 #endif
 542
 543 #if wxUSE_CTL3D
 544     Ctl3dUnregister(wxhInstance);
 545 #endif
 546
 547     if (wxWinHandleList)
 548         delete wxWinHandleList ;
 549
 550     wxClassInfo::CleanUpClasses();
 551
 552     delete wxTheApp;
 553     wxTheApp = NULL;
 554
 555 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 556     // At this point we want to check if there are any memory
 557     // blocks that aren't part of the wxDebugContext itself,
 558     // as a special case. Then when dumping we need to ignore
 559     // wxDebugContext, too.
 560     if (wxDebugContext::CountObjectsLeft() > 0)
 561     {
 562         wxLogDebug("There were memory leaks.");
 563         wxDebugContext::Dump();
 564         wxDebugContext::PrintStatistics();
 565     }
 566     //  wxDebugContext::SetStream(NULL, NULL);
 567 #endif
 568
 569     // do it as the very last thing because everything else can log messages
 570     delete wxLog::SetActiveTarget(NULL);
 571 }
 572
 573 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 574
 575 // temporarily disable this warning which would be generated in release builds
 576 // because of __try
 577 #ifdef __VISUALC__
 578     #pragma warning(disable: 4715) // not all control paths return a value
 579 #endif // Visual C++
 580
 581 //// Main wxWindows entry point
 582 int wxEntry(WXHINSTANCE hInstance,
 583             WXHINSTANCE WXUNUSED(hPrevInstance),
 584             char *lpCmdLine,
 585             int nCmdShow,
 586             bool enterLoop)
 587 {
 588     // do check for memory leaks on program exit
 589     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 590     //  deallocated memory which may be used to simulate low-memory condition)
 591     wxCrtSetDbgFlag(_CRTDBG_LEAK_CHECK_DF);
 592
 593     // take everything into a try-except block in release build
 594     // FIXME other compilers must support Win32 SEH (structured exception
 595     //       handling) too, just find the appropriate keyword in their docs!
 596     //       Please note that it's _not_ the same as C++ exceptions!
 597 #if !defined(__WXDEBUG__) && defined(__VISUALC__)
 598     #define CATCH_PROGRAM_EXCEPTIONS
 599
 600     __try {
 601 #else
 602     #undef  CATCH_PROGRAM_EXCEPTIONS
 603 #endif
 604
 605         wxhInstance = (HINSTANCE) hInstance;
 606
 607         if (!wxApp::Initialize())
 608             return 0;
 609
 610         // create the application object or ensure that one already exists
 611         if (!wxTheApp)
 612         {
 613             // The app may have declared a global application object, but we recommend
 614             // the IMPLEMENT_APP macro is used instead, which sets an initializer
 615             // function for delayed, dynamic app object construction.
 616             wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 617                          "No initializer - use IMPLEMENT_APP macro." );
 618
 619             wxTheApp = (*wxApp::GetInitializerFunction()) ();
 620         }
 621
 622         wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 623
 624         // save the WinMain() parameters
 625         wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 626         wxTheApp->m_nCmdShow = nCmdShow;
 627
 628         // GUI-specific initialisation. In fact on Windows we don't have any,
 629         // but this call is provided for compatibility across platforms.
 630         wxTheApp->OnInitGui() ;
 631
 632         int retValue = 0;
 633
 634         if ( wxTheApp->OnInit() )
 635         {
 636             if ( enterLoop )
 637             {
 638                 retValue = wxTheApp->OnRun();
 639             }
 640             else
 641                 // We want to initialize, but not run or exit immediately.
 642                 return 1;
 643         }
 644         //else: app initialization failed, so we skipped OnRun()
 645
 646         wxWindow *topWindow = wxTheApp->GetTopWindow();
 647         if ( topWindow )
 648         {
 649             // Forcibly delete the window.
 650             if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 651                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 652             {
 653                 topWindow->Close(TRUE);
 654                 wxTheApp->DeletePendingObjects();
 655             }
 656             else
 657             {
 658                 delete topWindow;
 659                 wxTheApp->SetTopWindow(NULL);
 660             }
 661         }
 662
 663         wxTheApp->OnExit();
 664
 665         wxApp::CleanUp();
 666
 667         return retValue;
 668
 669 #ifdef CATCH_PROGRAM_EXCEPTIONS
 670     }
 671     __except ( EXCEPTION_EXECUTE_HANDLER ) {
 672         /*
 673            if ( wxTheApp )
 674            wxTheApp->OnFatalException();
 675          */
 676
 677         // using wxLog would be unsafe here
 678         ::MessageBox(NULL,
 679                      _("Unrecoverable program error detected: "
 680                      " the application will terminate."),
 681                      _("Fatal Error"),
 682                      MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 683
 684         ::ExitProcess(3); // the same exit code as abort()
 685
 686         // NOTREACHED
 687     }
 688 #endif // CATCH_PROGRAM_EXCEPTIONS
 689 }
 690
 691 // restore warning state
 692 #ifdef __VISUALC__
 693     #pragma warning(default: 4715) // not all control paths return a value
 694 #endif // Visual C++
 695
 696 #else /*  _WINDLL  */
 697
 698 //// Entry point for DLLs
 699
 700 int wxEntry(WXHINSTANCE hInstance)
 701 {
 702     wxhInstance = (HINSTANCE) hInstance;
 703     wxApp::Initialize();
 704
 705     // The app may have declared a global application object, but we recommend
 706     // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 707     // for delayed, dynamic app object construction.
 708     if (!wxTheApp)
 709     {
 710         wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 711                      "No initializer - use IMPLEMENT_APP macro." );
 712
 713         wxTheApp = (* wxApp::GetInitializerFunction()) ();
 714     }
 715
 716     wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 717
 718     wxTheApp->argc = 0;
 719     wxTheApp->argv = NULL;
 720
 721     wxTheApp->OnInitGui();
 722
 723     wxTheApp->OnInit();
 724
 725     wxWindow *topWindow = wxTheApp->GetTopWindow();
 726     if ( topWindow && topWindow->GetHWND())
 727     {
 728         topWindow->Show(TRUE);
 729     }
 730
 731     return 1;
 732 }
 733 #endif // _WINDLL
 734
 735 //// Static member initialization
 736
 737 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 738
 739 wxApp::wxApp()
 740 {
 741     m_topWindow = NULL;
 742     wxTheApp = this;
 743     m_className = "";
 744     m_wantDebugOutput = TRUE ;
 745     m_appName = "";
 746     argc = 0;
 747     argv = NULL;
 748 #ifdef __WXMSW__
 749     m_printMode = wxPRINT_WINDOWS;
 750 #else
 751     m_printMode = wxPRINT_POSTSCRIPT;
 752 #endif
 753     m_exitOnFrameDelete = TRUE;
 754     m_auto3D = TRUE;
 755 }
 756
 757 wxApp::~wxApp()
 758 {
 759     // Delete command-line args
 760     int i;
 761     for (i = 0; i < argc; i++)
 762     {
 763         delete[] argv[i];
 764     }
 765     delete[] argv;
 766 }
 767
 768 bool wxApp::Initialized()
 769 {
 770 #ifndef _WINDLL
 771     if (GetTopWindow())
 772         return TRUE;
 773     else
 774         return FALSE;
 775 #endif
 776 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 777     return TRUE;
 778 #endif
 779 }
 780
 781 /*
 782  * Get and process a message, returning FALSE if WM_QUIT
 783  * received (and also set the flag telling the app to exit the main loop)
 784  *
 785  */
 786 bool wxApp::DoMessage()
 787 {
 788     BOOL rc = ::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0);
 789     if ( rc == 0 )
 790     {
 791         // got WM_QUIT
 792         m_keepGoing = FALSE;
 793
 794         return FALSE;
 795     }
 796     else if ( rc == -1 )
 797     {
 798         // should never happen, but let's test for it nevertheless
 799         wxLogLastError("GetMessage");
 800     }
 801     else
 802     {
 803 #if wxUSE_THREADS
 804         wxASSERT_MSG( wxThread::IsMain(),
 805                       "only the main thread can process Windows messages" );
 806
 807         static bool s_hadGuiLock = TRUE;
 808         static wxMsgArray s_aSavedMessages;
 809
 810         // if a secondary thread owns is doing GUI calls, save all messages for
 811         // later processing - we can't process them right now because it will
 812         // lead to recursive library calls (and we're not reentrant)
 813         if ( !wxGuiOwnedByMainThread() )
 814         {
 815             s_hadGuiLock = FALSE;
 816
 817             // leave out WM_COMMAND messages: too dangerous, sometimes
 818             // the message will be processed twice
 819             if ( !wxIsWaitingForThread() ||
 820                     s_currentMsg.message != WM_COMMAND )
 821             {
 822                 s_aSavedMessages.Add(s_currentMsg);
 823             }
 824
 825             return TRUE;
 826         }
 827         else
 828         {
 829             // have we just regained the GUI lock? if so, post all of the saved
 830             // messages
 831             //
 832             // FIXME of course, it's not _exactly_ the same as processing the
 833             //       messages normally - expect some things to break...
 834             if ( !s_hadGuiLock )
 835             {
 836                 s_hadGuiLock = TRUE;
 837
 838                 size_t count = s_aSavedMessages.Count();
 839                 for ( size_t n = 0; n < count; n++ )
 840                 {
 841                     MSG& msg = s_aSavedMessages[n];
 842
 843                     if ( !ProcessMessage((WXMSG *)&msg) )
 844                     {
 845                         ::TranslateMessage(&msg);
 846                         ::DispatchMessage(&msg);
 847                     }
 848                 }
 849
 850                 s_aSavedMessages.Empty();
 851             }
 852         }
 853 #endif // wxUSE_THREADS
 854
 855         // Process the message
 856         if ( !ProcessMessage((WXMSG *)&s_currentMsg) )
 857         {
 858             ::TranslateMessage(&s_currentMsg);
 859             wxApp::sm_lastMessageTime = s_currentMsg.time; /* MATTHEW: timeStamp impl. */
 860             ::DispatchMessage(&s_currentMsg);
 861         }
 862     }
 863
 864     return TRUE;
 865 }
 866
 867 /*
 868  * Keep trying to process messages until WM_QUIT
 869  * received.
 870  *
 871  * If there are messages to be processed, they will all be
 872  * processed and OnIdle will not be called.
 873  * When there are no more messages, OnIdle is called.
 874  * If OnIdle requests more time,
 875  * it will be repeatedly called so long as there are no pending messages.
 876  * A 'feature' of this is that once OnIdle has decided that no more processing
 877  * is required, then it won't get processing time until further messages
 878  * are processed (it'll sit in DoMessage).
 879  */
 880
 881 int wxApp::MainLoop()
 882 {
 883     m_keepGoing = TRUE;
 884
 885     while ( m_keepGoing )
 886     {
 887 #if wxUSE_THREADS
 888         wxMutexGuiLeaveOrEnter();
 889 #endif // wxUSE_THREADS
 890
 891         while ( !::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 892                 ProcessIdle() )
 893         {
 894         }
 895
 896         DoMessage();
 897     }
 898
 899     return s_currentMsg.wParam;
 900 }
 901
 902 // Returns TRUE if more time is needed.
 903 bool wxApp::ProcessIdle()
 904 {
 905     wxIdleEvent event;
 906     event.SetEventObject(this);
 907     ProcessEvent(event);
 908
 909     return event.MoreRequested();
 910 }
 911
 912 void wxApp::ExitMainLoop()
 913 {
 914     m_keepGoing = FALSE;
 915 }
 916
 917 bool wxApp::Pending()
 918 {
 919     return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0) ;
 920 }
 921
 922 void wxApp::Dispatch()
 923 {
 924     DoMessage();
 925 }
 926
 927 /*
 928  * Give all windows a chance to preprocess
 929  * the message. Some may have accelerator tables, or have
 930  * MDI complications.
 931  */
 932
 933 bool wxApp::ProcessMessage(WXMSG *wxmsg)
 934 {
 935     MSG *msg = (MSG *)wxmsg;
 936     HWND hWnd = msg->hwnd;
 937     wxWindow *wndThis = wxFindWinFromHandle((WXHWND)hWnd), *wnd;
 938
 939     // Try translations first; find the youngest window with
 940     // a translation table.
 941     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 942     {
 943         if ( wnd->MSWTranslateMessage(wxmsg) )
 944             return TRUE;
 945     }
 946
 947     // Anyone for a non-translation message? Try youngest descendants first.
 948     for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
 949     {
 950         if ( wnd->MSWProcessMessage(wxmsg) )
 951             return TRUE;
 952     }
 953
 954     return FALSE;
 955 }
 956
 957 void wxApp::OnIdle(wxIdleEvent& event)
 958 {
 959     static bool s_inOnIdle = FALSE;
 960
 961     // Avoid recursion (via ProcessEvent default case)
 962     if ( s_inOnIdle )
 963         return;
 964
 965     s_inOnIdle = TRUE;
 966
 967     // 'Garbage' collection of windows deleted with Close().
 968     DeletePendingObjects();
 969
 970     // flush the logged messages if any
 971     wxLog *pLog = wxLog::GetActiveTarget();
 972     if ( pLog != NULL && pLog->HasPendingMessages() )
 973         pLog->Flush();
 974
 975     // Send OnIdle events to all windows
 976     if ( SendIdleEvents() )
 977     {
 978         // SendIdleEvents() returns TRUE if at least one window requested more
 979         // idle events
 980         event.RequestMore(TRUE);
 981     }
 982
 983     s_inOnIdle = FALSE;
 984 }
 985
 986 // Send idle event to all top-level windows
 987 bool wxApp::SendIdleEvents()
 988 {
 989     bool needMore = FALSE;
 990     wxNode* node = wxTopLevelWindows.First();
 991     while (node)
 992     {
 993         wxWindow* win = (wxWindow*) node->Data();
 994         if (SendIdleEvents(win))
 995             needMore = TRUE;
 996
 997         node = node->Next();
 998     }
 999
1000     return needMore;
1001 }
1002
1003 // Send idle event to window and all subwindows
1004 bool wxApp::SendIdleEvents(wxWindow* win)
1005 {
1006     bool needMore = FALSE;
1007
1008     wxIdleEvent event;
1009     event.SetEventObject(win);
1010     win->GetEventHandler()->ProcessEvent(event);
1011
1012     if (event.MoreRequested())
1013         needMore = TRUE;
1014
1015     wxNode* node = win->GetChildren().First();
1016     while (node)
1017     {
1018         wxWindow* win = (wxWindow*) node->Data();
1019         if (SendIdleEvents(win))
1020             needMore = TRUE;
1021
1022         node = node->Next();
1023     }
1024     return needMore ;
1025 }
1026
1027 void wxApp::DeletePendingObjects()
1028 {
1029     wxNode *node = wxPendingDelete.First();
1030     while (node)
1031     {
1032         wxObject *obj = (wxObject *)node->Data();
1033
1034         delete obj;
1035
1036         if (wxPendingDelete.Member(obj))
1037             delete node;
1038
1039         // Deleting one object may have deleted other pending
1040         // objects, so start from beginning of list again.
1041         node = wxPendingDelete.First();
1042     }
1043 }
1044
1045 void wxApp::OnEndSession(wxCloseEvent& WXUNUSED(event))
1046 {
1047     if (GetTopWindow())
1048         GetTopWindow()->Close(TRUE);
1049 }
1050
1051 // Default behaviour: close the application with prompts. The
1052 // user can veto the close, and therefore the end session.
1053 void wxApp::OnQueryEndSession(wxCloseEvent& event)
1054 {
1055     if (GetTopWindow())
1056     {
1057         if (!GetTopWindow()->Close(!event.CanVeto()))
1058             event.Veto(TRUE);
1059     }
1060 }
1061
1062 wxLog* wxApp::CreateLogTarget()
1063 {
1064     return new wxLogGui;
1065 }
1066
1067 wxWindow* wxApp::GetTopWindow() const
1068 {
1069     if (m_topWindow)
1070         return m_topWindow;
1071     else if (wxTopLevelWindows.Number() > 0)
1072         return (wxWindow*) wxTopLevelWindows.First()->Data();
1073     else
1074         return NULL;
1075 }
1076
1077 int wxApp::GetComCtl32Version() const
1078 {
1079     // have we loaded COMCTL32 yet?
1080     HMODULE theModule = ::GetModuleHandle("COMCTL32");
1081     int version = 0;
1082
1083     // if so, then we can check for the version
1084     if (theModule)
1085     {
1086         // InitCommonControlsEx is unique to 4.7 and later
1087         FARPROC theProc = ::GetProcAddress(theModule, "InitCommonControlsEx");
1088
1089         if (! theProc)
1090         {                    // not found, must be 4.00
1091             version = 400;
1092         }
1093         else
1094         {
1095             // The following symbol are unique to 4.71
1096             //   DllInstall
1097             //   FlatSB_EnableScrollBar FlatSB_GetScrollInfo FlatSB_GetScrollPos
1098             //   FlatSB_GetScrollProp FlatSB_GetScrollRange FlatSB_SetScrollInfo
1099             //   FlatSB_SetScrollPos FlatSB_SetScrollProp FlatSB_SetScrollRange
1100             //   FlatSB_ShowScrollBar
1101             //   _DrawIndirectImageList _DuplicateImageList
1102             //   InitializeFlatSB
1103             //   UninitializeFlatSB
1104             // we could check for any of these - I chose DllInstall
1105             FARPROC theProc = ::GetProcAddress(theModule, "DllInstall");
1106             if (! theProc)
1107             {
1108                 // not found, must be 4.70
1109                 version = 470;
1110             }
1111             else
1112             {                         // found, must be 4.71
1113                 version = 471;
1114             }
1115         }
1116     }
1117     return version;
1118 }
1119
1120 void wxExit()
1121 {
1122     wxLogError(_("Fatal error: exiting"));
1123
1124     wxApp::CleanUp();
1125 }
1126
1127 // Yield to incoming messages
1128 bool wxYield()
1129 {
1130     MSG msg;
1131     // We want to go back to the main message loop
1132     // if we see a WM_QUIT. (?)
1133     while (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) && msg.message != WM_QUIT)
1134     {
1135         if ( !wxTheApp->DoMessage() )
1136             break;
1137     }
1138
1139     return TRUE;
1140 }
1141
1142 HINSTANCE wxGetInstance()
1143 {
1144     return wxhInstance;
1145 }
1146
1147 void wxSetInstance(HINSTANCE hInst)
1148 {
1149     wxhInstance = hInst;
1150 }
1151
1152 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
1153 // if in a separate file. So include it here to ensure it's linked.
1154 #if (defined(__VISUALC__) && !defined(__WIN32__)) || (defined(__GNUWIN32__) && !defined(__TWIN32__))
1155 #include "main.cpp"
1156 #endif