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 #ifdef __GNUG__
  13   #pragma implementation "app.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #if defined(__BORLANDC__)
  20   #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24   #include "wx/frame.h"
  25   #include "wx/app.h"
  26   #include "wx/utils.h"
  27   #include "wx/gdicmn.h"
  28   #include "wx/pen.h"
  29   #include "wx/brush.h"
  30   #include "wx/cursor.h"
  31   #include "wx/icon.h"
  32   #include "wx/palette.h"
  33   #include "wx/dc.h"
  34   #include "wx/dialog.h"
  35   #include "wx/msgdlg.h"
  36 #endif
  37
  38 #include "wx/msw/private.h"
  39 #include "wx/log.h"
  40 #include "wx/module.h"
  41
  42 #if wxUSE_WX_RESOURCES
  43   #include "wx/resource.h"
  44 #endif
  45
  46 #include <string.h>
  47 #include <ctype.h>
  48
  49 #if defined(__WIN95__) && !defined(__GNUWIN32__)
  50   #include <commctrl.h>
  51 #endif
  52
  53 // use debug CRT functions for memory leak detections in VC++
  54 /* This still doesn't work for me, Vadim.
  55 #if defined(__WXDEBUG__) && defined(_MSC_VER)
  56   // VC++ uses this macro as debug/release mode indicator
  57   #ifndef _DEBUG
  58     #define _DEBUG
  59   #endif
  60
  61   #include <crtdbg.h>
  62 #endif
  63 */
  64
  65 extern char *wxBuffer;
  66 extern char *wxOsVersion;
  67 extern wxList *wxWinHandleList;
  68 extern wxList wxPendingDelete;
  69 extern void wxSetKeyboardHook(bool doIt);
  70 extern wxCursor *g_globalCursor;
  71
  72 HINSTANCE wxhInstance = 0;
  73 static MSG s_currentMsg;
  74 wxApp *wxTheApp = NULL;
  75
  76 // @@ why not const? and not static?
  77 char wxFrameClassName[]         = "wxFrameClass";
  78 char wxMDIFrameClassName[]      = "wxMDIFrameClass";
  79 char wxMDIChildFrameClassName[] = "wxMDIChildFrameClass";
  80 char wxPanelClassName[]         = "wxPanelClass";
  81 char wxCanvasClassName[]        = "wxCanvasClass";
  82
  83 HICON wxSTD_FRAME_ICON = NULL;
  84 HICON wxSTD_MDICHILDFRAME_ICON = NULL;
  85 HICON wxSTD_MDIPARENTFRAME_ICON = NULL;
  86
  87 HICON wxDEFAULT_FRAME_ICON = NULL;
  88 HICON wxDEFAULT_MDICHILDFRAME_ICON = NULL;
  89 HICON wxDEFAULT_MDIPARENTFRAME_ICON = NULL;
  90
  91 HBRUSH wxDisableButtonBrush = 0;
  92
  93 LRESULT APIENTRY wxWndProc(HWND, UINT, WPARAM, LPARAM);
  94
  95 #if !USE_SHARED_LIBRARY
  96   IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  97
  98   BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  99       EVT_IDLE(wxApp::OnIdle)
 100   END_EVENT_TABLE()
 101 #endif
 102
 103 long wxApp::sm_lastMessageTime = 0;
 104
 105 #ifdef __WIN95__
 106   static HINSTANCE gs_hRichEdit = NULL;
 107 #endif
 108
 109 //// Initialize
 110
 111 bool wxApp::Initialize()
 112 {
 113   wxBuffer = new char[1500];
 114
 115 /*
 116   #if defined(__WXDEBUG__) && defined(_MSC_VER)
 117     // do check for memory leaks on program exit
 118     // (another useful flag is _CRTDBG_DELAY_FREE_MEM_DF which doesn't free
 119     //  deallocated memory which may be used to simulate low-memory condition)
 120     _CrtSetDbgFlag(_CrtSetDbgFlag(_CRTDBG_REPORT_FLAG) | _CRTDBG_LEAK_CHECK_DF);
 121   #endif // debug build under MS VC++
 122 */
 123
 124   #if (WXDEBUG && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 125     #if defined(_WINDLL)
 126       streambuf* sBuf = NULL;
 127     #else  // EXE
 128       streambuf* sBuf = new wxDebugStreamBuf;
 129     #endif // DLL
 130
 131     ostream* oStr = new ostream(sBuf) ;
 132     wxDebugContext::SetStream(oStr, sBuf);
 133   #endif  // wxUSE_MEMORY_TRACING
 134
 135   wxClassInfo::InitializeClasses();
 136
 137   #if wxUSE_RESOURCES
 138     wxGetResource("wxWindows", "OsVersion", &wxOsVersion);
 139   #endif
 140
 141   wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 142   wxTheColourDatabase->Initialize();
 143
 144   wxInitializeStockLists();
 145   wxInitializeStockObjects();
 146
 147   #if wxUSE_WX_RESOURCES
 148     wxInitializeResourceSystem();
 149   #endif
 150
 151   wxBitmap::InitStandardHandlers();
 152
 153   #if defined(__WIN95__)
 154     InitCommonControls();
 155     gs_hRichEdit = LoadLibrary("RICHED32.DLL");
 156
 157     if (gs_hRichEdit == NULL)
 158     {
 159       wxMessageBox("Could not initialise Rich Edit DLL");
 160     }
 161   #endif
 162
 163   #if  defined(WX_DRAG_DROP)
 164     // we need to initialize OLE library
 165     if ( FAILED(::OleInitialize(NULL)) )
 166       wxFatalError(_("Cannot initialize OLE"));
 167   #endif
 168
 169   #if CTL3D
 170     if (!Ctl3dRegister(wxhInstance))
 171       wxFatalError("Cannot register CTL3D");
 172
 173     Ctl3dAutoSubclass(wxhInstance);
 174   #endif
 175
 176   g_globalCursor = new wxCursor;
 177
 178   wxSTD_FRAME_ICON = LoadIcon(wxhInstance, "wxSTD_FRAME");
 179   wxSTD_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, "wxSTD_MDIPARENTFRAME");
 180   wxSTD_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, "wxSTD_MDICHILDFRAME");
 181
 182   wxDEFAULT_FRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_FRAME");
 183   wxDEFAULT_MDIPARENTFRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_MDIPARENTFRAME");
 184   wxDEFAULT_MDICHILDFRAME_ICON = LoadIcon(wxhInstance, "wxDEFAULT_MDICHILDFRAME");
 185
 186   RegisterWindowClasses();
 187
 188   // Create the brush for disabling bitmap buttons
 189
 190   LOGBRUSH lb ;
 191   lb.lbStyle = BS_PATTERN;
 192   lb.lbHatch = (int)LoadBitmap( wxhInstance, "wxDISABLE_BUTTON_BITMAP" ) ;
 193   wxDisableButtonBrush = ::CreateBrushIndirect( & lb ) ;
 194   ::DeleteObject( (HGDIOBJ)lb.lbHatch ) ;
 195
 196   #if wxUSE_PENWINDOWS
 197     wxRegisterPenWin();
 198   #endif
 199
 200   wxWinHandleList = new wxList(wxKEY_INTEGER);
 201
 202   // This is to foil optimizations in Visual C++ that
 203   // throw out dummy.obj.
 204   #if (_MSC_VER >= 800) && !defined(WXMAKINGDLL)
 205     extern char wxDummyChar;
 206     if (wxDummyChar) wxDummyChar++;
 207   #endif
 208
 209   wxSetKeyboardHook(TRUE);
 210
 211   wxModule::RegisterModules();
 212   if (!wxModule::InitializeModules())
 213     return FALSE;
 214   return TRUE;
 215 }
 216
 217 //// RegisterWindowClasses
 218
 219 bool wxApp::RegisterWindowClasses()
 220 {
 221 ///////////////////////////////////////////////////////////////////////
 222 // Register the frame window class.
 223   WNDCLASS wndclass;   // Structure used to register Windows class.
 224
 225   wndclass.style         = CS_HREDRAW | CS_VREDRAW;
 226   wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 227   wndclass.cbClsExtra    = 0;
 228   wndclass.cbWndExtra    = sizeof( DWORD ); // was 4
 229   wndclass.hInstance     = wxhInstance;
 230   wndclass.hIcon         = NULL;        // wxSTD_FRAME_ICON;
 231   wndclass.hCursor       = LoadCursor( NULL, IDC_ARROW );
 232   wndclass.hbrBackground =  (HBRUSH)(COLOR_APPWORKSPACE+1) ;
 233 //  wndclass.hbrBackground = GetStockObject( WHITE_BRUSH );
 234   wndclass.lpszMenuName  = NULL;
 235 #ifdef _MULTIPLE_INSTANCES
 236   sprintf( wxFrameClassName,"wxFrameClass%d", wxhInstance );
 237 #endif
 238   wndclass.lpszClassName = wxFrameClassName;
 239
 240   if (!RegisterClass( &wndclass ))
 241   {
 242     // wxFatalError("Can't register Frame Window class");
 243   }
 244
 245 ///////////////////////////////////////////////////////////////////////
 246 // Register the MDI frame window class.
 247   WNDCLASS wndclass1;   // Structure used to register Windows class.
 248
 249   wndclass1.style         = CS_HREDRAW | CS_VREDRAW;
 250   wndclass1.lpfnWndProc   = (WNDPROC)wxWndProc;
 251   wndclass1.cbClsExtra    = 0;
 252   wndclass1.cbWndExtra    = sizeof( DWORD ); // was 4
 253   wndclass1.hInstance     = wxhInstance;
 254   wndclass1.hIcon         = NULL; // wxSTD_MDIPARENTFRAME_ICON;
 255   wndclass1.hCursor       = LoadCursor( NULL, IDC_ARROW );
 256 //  wndclass1.hbrBackground =  (HBRUSH)(COLOR_APPWORKSPACE+1) ;
 257   wndclass1.hbrBackground = NULL;
 258   wndclass1.lpszMenuName  = NULL;
 259
 260   wndclass1.lpszClassName = wxMDIFrameClassName;
 261   if (!RegisterClass( &wndclass1 ))
 262   {
 263 //    wxFatalError("Can't register MDI Frame window class");
 264 //  return FALSE;
 265   }
 266
 267 ///////////////////////////////////////////////////////////////////////
 268 // Register the MDI child frame window class.
 269   WNDCLASS wndclass4;   // Structure used to register Windows class.
 270
 271   wndclass4.style         = CS_HREDRAW | CS_VREDRAW;
 272   wndclass4.lpfnWndProc   = (WNDPROC)wxWndProc;
 273   wndclass4.cbClsExtra    = 0;
 274   wndclass4.cbWndExtra    = sizeof( DWORD ); // was 4
 275   wndclass4.hInstance     = wxhInstance;
 276   wndclass4.hIcon         = NULL;       // wxSTD_MDICHILDFRAME_ICON;
 277   wndclass4.hCursor       = LoadCursor( NULL, IDC_ARROW );
 278   // TODO: perhaps this should be NULL so that Windows doesn't
 279   // paint the background itself (would OnEraseBackground duplicate
 280   // this?)
 281   wndclass4.hbrBackground =  (HBRUSH)(COLOR_WINDOW+1) ;
 282 //  wndclass4.hbrBackground = NULL;
 283   wndclass4.lpszMenuName  = NULL;
 284   wndclass4.lpszClassName = wxMDIChildFrameClassName;
 285
 286   if (!RegisterClass( &wndclass4 ))
 287   {
 288 //   wxFatalError("Can't register MDI child frame window class");
 289 //   return FALSE;
 290   }
 291
 292 ///////////////////////////////////////////////////////////////////////
 293 // Register the panel window class.
 294   WNDCLASS wndclass2;   // Structure used to register Windows class.
 295   memset(&wndclass2, 0, sizeof(WNDCLASS));   // start with NULL defaults
 296   // Use CS_OWNDC to avoid messing about restoring the context
 297   // for every graphic operation.
 298   wndclass2.style         = CS_HREDRAW | CS_VREDRAW;
 299   wndclass2.lpfnWndProc   = (WNDPROC)wxWndProc;
 300   wndclass2.cbClsExtra    = 0;
 301   wndclass2.cbWndExtra    = sizeof( DWORD ); // was 4
 302   wndclass2.hInstance     = wxhInstance;
 303   wndclass2.hIcon         = NULL;
 304   wndclass2.hCursor       = NULL;
 305 //  wndclass2.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1) ;
 306   wndclass2.hbrBackground = (HBRUSH) GetStockObject( LTGRAY_BRUSH );
 307   wndclass2.lpszMenuName  = NULL;
 308   wndclass2.lpszClassName = wxPanelClassName;
 309   if (!RegisterClass( &wndclass2 ))
 310   {
 311 //   wxFatalError("Can't register Panel Window class");
 312 //   return FALSE;
 313   }
 314
 315 ///////////////////////////////////////////////////////////////////////
 316 // Register the canvas and textsubwindow class name
 317   WNDCLASS wndclass3;   // Structure used to register Windows class.
 318   memset(&wndclass3, 0, sizeof(WNDCLASS));   // start with NULL defaults
 319   // Use CS_OWNDC to avoid messing about restoring the context
 320   // for every graphic operation.
 321 //  wndclass3.style         = CS_HREDRAW | CS_VREDRAW | CS_OWNDC | CS_DBLCLKS ;
 322   // wxWin 2.0
 323   wndclass3.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS ;
 324   wndclass3.lpfnWndProc   = (WNDPROC)wxWndProc;
 325   wndclass3.cbClsExtra    = 0;
 326   wndclass3.cbWndExtra    = sizeof( DWORD ); // was 4
 327   wndclass3.hInstance     = wxhInstance;
 328   wndclass3.hIcon         = NULL;
 329   wndclass3.hCursor       = NULL;
 330 //  wndclass3.hbrBackground = (HBRUSH)(COLOR_WINDOW+1) ;
 331   wndclass3.hbrBackground = NULL;
 332   wndclass3.lpszMenuName  = NULL;
 333   wndclass3.lpszClassName = wxCanvasClassName;
 334   if (!RegisterClass( &wndclass3))
 335   {
 336 //   wxFatalError("Can't register Canvas class");
 337 //   return FALSE;
 338   }
 339
 340   return TRUE;
 341 }
 342
 343 //// Convert Windows to argc, argv style
 344
 345 // FIXME this code should be rewritten (use wxArrayString instead...)
 346 void wxApp::ConvertToStandardCommandArgs(char* lpCmdLine)
 347 {
 348   // Split command line into tokens, as in usual main(argc, argv)
 349   char **command = new char*[50]; // VZ: sure? why not 25 or 73 and a half??
 350
 351   int count = 0;
 352   char *buf = new char[strlen(lpCmdLine) + 1];
 353
 354   /* Model independent strcpy */
 355   int i;
 356   for (i = 0; (buf[i] = lpCmdLine[i]) != 0; i++)
 357   {
 358     /* loop */;
 359   }
 360
 361   // Get application name
 362   char name[260]; // 260 is MAX_PATH value from windef.h
 363   ::GetModuleFileName(wxhInstance, name, WXSIZEOF(name));
 364
 365   // Is it only 16-bit Borland that already copies the program name
 366   // to the first argv index?
 367 #if !defined(__GNUWIN32__)
 368 // #if ! (defined(__BORLANDC__) && !defined(__WIN32__))
 369   command[count++] = copystring(name);
 370 // #endif
 371 #endif
 372
 373   strcpy(name, wxFileNameFromPath(name));
 374   wxStripExtension(name);
 375   wxTheApp->SetAppName(name);
 376
 377   /* Break up string */
 378   // Treat strings enclosed in double-quotes as single arguments
 379   char* str = buf;
 380   while (*str)
 381   {
 382 /*
 383         if ( count == WXSIZEOF(command) )
 384     {
 385       wxFAIL_MSG("too many command line args.");
 386       break;
 387     }
 388 */
 389     while ( *str && isspace(*str) )  // skip whitespace
 390       str++;
 391
 392     if (*str == '"')
 393     {
 394       str++;
 395       command[count++] = str;
 396       while (*str && *str != '"')
 397         str++;
 398     }
 399     else if (*str)
 400     {
 401       command[count++] = str;
 402       while (*str && !isspace(*str))
 403         str++;
 404     }
 405     if (*str)
 406       *str++ = '\0';
 407   }
 408
 409   wxTheApp->argv = new char*[count + 1];
 410   wxTheApp->argv[count] = NULL; /* argv[] is NULL terminated list! */
 411   wxTheApp->argc = count;
 412
 413   for (i = 0; i < count; i++)
 414   {
 415     wxTheApp->argv[i] = copystring(command[i]);
 416
 417     delete [] command[i];
 418   }
 419
 420   delete [] command;
 421   delete [] buf;
 422 }
 423
 424 //// Cleans up any wxWindows internal structures left lying around
 425
 426 void wxApp::CleanUp()
 427 {
 428   //// COMMON CLEANUP
 429   wxModule::CleanUpModules();
 430
 431 #if wxUSE_WX_RESOURCES
 432   wxCleanUpResourceSystem();
 433
 434 //  wxDefaultResourceTable->ClearTable();
 435 #endif
 436
 437   // Indicate that the cursor can be freed,
 438   // so that cursor won't be deleted by deleting
 439   // the bitmap list before g_globalCursor goes out
 440   // of scope (double deletion of the cursor).
 441   wxSetCursor(wxNullCursor);
 442   delete g_globalCursor;
 443
 444   wxDeleteStockObjects() ;
 445
 446   // Destroy all GDI lists, etc.
 447   wxDeleteStockLists();
 448
 449   delete wxTheColourDatabase;
 450   wxTheColourDatabase = NULL;
 451
 452   wxBitmap::CleanUpHandlers();
 453
 454   delete[] wxBuffer;
 455   wxBuffer = NULL;
 456
 457   //// WINDOWS-SPECIFIC CLEANUP
 458
 459   wxSetKeyboardHook(FALSE);
 460
 461 #ifdef __WIN95__
 462   if (gs_hRichEdit != NULL)
 463     FreeLibrary(gs_hRichEdit);
 464 #endif
 465
 466 #if wxUSE_PENWINDOWS
 467   wxCleanUpPenWin();
 468 #endif
 469
 470   if (wxSTD_FRAME_ICON)
 471     DestroyIcon(wxSTD_FRAME_ICON);
 472   if (wxSTD_MDICHILDFRAME_ICON)
 473     DestroyIcon(wxSTD_MDICHILDFRAME_ICON);
 474   if (wxSTD_MDIPARENTFRAME_ICON)
 475     DestroyIcon(wxSTD_MDIPARENTFRAME_ICON);
 476
 477   if (wxDEFAULT_FRAME_ICON)
 478     DestroyIcon(wxDEFAULT_FRAME_ICON);
 479   if (wxDEFAULT_MDICHILDFRAME_ICON)
 480     DestroyIcon(wxDEFAULT_MDICHILDFRAME_ICON);
 481   if (wxDEFAULT_MDIPARENTFRAME_ICON)
 482     DestroyIcon(wxDEFAULT_MDIPARENTFRAME_ICON);
 483
 484   if ( wxDisableButtonBrush )
 485     ::DeleteObject( wxDisableButtonBrush ) ;
 486
 487 #if     defined(WX_DRAG_DROP)
 488   ::OleUninitialize();
 489 #endif
 490
 491 #if CTL3D
 492   Ctl3dUnregister(wxhInstance);
 493 #endif
 494
 495   if (wxWinHandleList)
 496     delete wxWinHandleList ;
 497
 498   wxClassInfo::CleanUpClasses();
 499
 500   // do it as the very last thing because everything else can log messages
 501   wxLog::DontCreateOnDemand();
 502   delete wxLog::SetActiveTarget(NULL);
 503 }
 504
 505 #if !defined(_WINDLL) || (defined(_WINDLL) && defined(WXMAKINGDLL))
 506
 507 //// Main wxWindows entry point
 508 int wxEntry(WXHINSTANCE hInstance,
 509             WXHINSTANCE WXUNUSED(hPrevInstance),
 510             char *lpCmdLine,
 511             int nCmdShow,
 512             bool enterLoop)
 513 {
 514 #ifndef __WXDEBUG__ // take everything into a try-except block in release build
 515   try {
 516 #endif
 517
 518   wxhInstance = (HINSTANCE) hInstance;
 519
 520   if (!wxApp::Initialize())
 521     return 0;
 522
 523   // create the application object or ensure that one already exists
 524   if (!wxTheApp)
 525   {
 526     // The app may have declared a global application object, but we recommend
 527     // the IMPLEMENT_APP macro is used instead, which sets an initializer
 528     // function for delayed, dynamic app object construction.
 529     wxCHECK_MSG( wxApp::GetInitializerFunction(), 0,
 530                  "No initializer - use IMPLEMENT_APP macro." );
 531
 532     wxTheApp = (*wxApp::GetInitializerFunction()) ();
 533   }
 534
 535   wxCHECK_MSG( wxTheApp, 0, "You have to define an instance of wxApp!" );
 536
 537   // save the WinMain() parameters
 538   wxTheApp->ConvertToStandardCommandArgs(lpCmdLine);
 539   wxTheApp->m_nCmdShow = nCmdShow;
 540
 541   // GUI-specific initialisation. In fact on Windows we don't have any,
 542   // but this call is provided for compatibility across platforms.
 543   wxTheApp->OnInitGui() ;
 544
 545   int retValue = 0;
 546
 547   if ( wxTheApp->OnInit() )
 548   {
 549       if ( enterLoop )
 550       {
 551           retValue = wxTheApp->OnRun();
 552       }
 553   }
 554   //else: app initialization failed, so we skipped OnRun()
 555
 556   wxWindow *topWindow = wxTheApp->GetTopWindow();
 557   if ( topWindow )
 558   {
 559       // Forcibly delete the window.
 560       if ( topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 561            topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 562       {
 563           topWindow->Close(TRUE);
 564           wxTheApp->DeletePendingObjects();
 565       }
 566       else
 567       {
 568           delete topWindow;
 569           wxTheApp->SetTopWindow(NULL);
 570       }
 571   }
 572
 573   wxTheApp->OnExit();
 574   wxApp::CleanUp();
 575
 576   delete wxTheApp;
 577   wxTheApp = NULL;
 578
 579 #if (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() > 0)
 585   {
 586       wxTrace("There were memory leaks.\n");
 587       wxDebugContext::Dump();
 588       wxDebugContext::PrintStatistics();
 589   }
 590   wxDebugContext::SetStream(NULL, NULL);
 591 #endif
 592
 593   return retValue;
 594 #ifndef __WXDEBUG__ // catch exceptions only in release build
 595   }
 596   except ( EXCEPTION_EXECUTE_HANDLER ) {
 597     /*
 598     if ( wxTheApp )
 599       wxTheApp->OnFatalException();
 600     */
 601
 602     ::ExitProcess(3); // the same exit code as abort()
 603   }
 604 #endif //debug
 605 }
 606
 607 #else /*  _WINDLL  */
 608
 609 //// Entry point for DLLs
 610
 611 int wxEntry(WXHINSTANCE hInstance)
 612 {
 613   wxhInstance = (HINSTANCE) hInstance;
 614   wxApp::Initialize();
 615
 616   // The app may have declared a global application object, but we recommend
 617   // the IMPLEMENT_APP macro is used instead, which sets an initializer function
 618   // for delayed, dynamic app object construction.
 619
 620   if (!wxTheApp)
 621   {
 622     if (!wxApp::GetInitializerFunction())
 623     {
 624       MessageBox(NULL, "No initializer - use IMPLEMENT_APP macro.", "wxWindows Error", MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 625     return 0;
 626     }
 627
 628     wxTheApp = (* wxApp::GetInitializerFunction()) ();
 629   }
 630
 631   if (!wxTheApp) {
 632     MessageBox(NULL, "You have to define an instance of wxApp!", "wxWindows Error", MB_APPLMODAL | MB_ICONSTOP | MB_OK);
 633     return 0;
 634   }
 635
 636   wxTheApp->argc = 0;
 637   wxTheApp->argv = NULL;
 638
 639   wxTheApp->OnInitGui();
 640
 641   wxTheApp->OnInit();
 642
 643   if (wxTheApp->GetTopWindow() && wxTheApp->GetTopWindow()->GetHWND()) {
 644     wxTheApp->GetTopWindow()->Show(TRUE);
 645   }
 646
 647   return 1;
 648 }
 649 #endif // _WINDLL
 650
 651 //// Static member initialization
 652
 653 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 654
 655 wxApp::wxApp()
 656 {
 657   m_topWindow = NULL;
 658   wxTheApp = this;
 659   m_className = "";
 660   m_wantDebugOutput = TRUE ;
 661   m_appName = "";
 662   argc = 0;
 663   argv = NULL;
 664 #ifdef __WXMSW__
 665   m_printMode = wxPRINT_WINDOWS;
 666 #else
 667   m_printMode = wxPRINT_POSTSCRIPT;
 668 #endif
 669   m_exitOnFrameDelete = TRUE;
 670   m_auto3D = TRUE;
 671 }
 672
 673 wxApp::~wxApp()
 674 {
 675   // Delete command-line args
 676   int i;
 677   for (i = 0; i < argc; i++)
 678   {
 679     delete[] argv[i];
 680   }
 681   delete argv;
 682 }
 683
 684 bool wxApp::Initialized()
 685 {
 686 #ifndef _WINDLL
 687   if (GetTopWindow())
 688     return TRUE;
 689   else
 690     return FALSE;
 691 #endif
 692 #ifdef _WINDLL // Assume initialized if DLL (no way of telling)
 693   return TRUE;
 694 #endif
 695 }
 696
 697 /*
 698  * Get and process a message, returning FALSE if WM_QUIT
 699  * received.
 700  *
 701  */
 702 bool wxApp::DoMessage()
 703 {
 704   if (!::GetMessage(&s_currentMsg, (HWND) NULL, 0, 0))
 705   {
 706     return FALSE;
 707   }
 708
 709   // Process the message
 710   if (!ProcessMessage((WXMSG *)&s_currentMsg))
 711   {
 712     ::TranslateMessage(&s_currentMsg);
 713     wxApp::sm_lastMessageTime = s_currentMsg.time; /* MATTHEW: timeStamp impl. */
 714     ::DispatchMessage(&s_currentMsg);
 715   }
 716   return TRUE;
 717 }
 718
 719 /*
 720  * Keep trying to process messages until WM_QUIT
 721  * received.
 722  *
 723  * If there are messages to be processed, they will all be
 724  * processed and OnIdle will not be called.
 725  * When there are no more messages, OnIdle is called.
 726  * If OnIdle requests more time,
 727  * it will be repeatedly called so long as there are no pending messages.
 728  * A 'feature' of this is that once OnIdle has decided that no more processing
 729  * is required, then it won't get processing time until further messages
 730  * are processed (it'll sit in DoMessage).
 731  */
 732
 733 int wxApp::MainLoop()
 734 {
 735   m_keepGoing = TRUE;
 736   while (m_keepGoing)
 737   {
 738     while (!::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) &&
 739            ProcessIdle()) {}
 740     if (!DoMessage())
 741       m_keepGoing = FALSE;
 742   }
 743
 744   return s_currentMsg.wParam;
 745 }
 746
 747 // Returns TRUE if more time is needed.
 748 bool wxApp::ProcessIdle()
 749 {
 750     wxIdleEvent event;
 751     event.SetEventObject(this);
 752     ProcessEvent(event);
 753
 754     return event.MoreRequested();
 755 }
 756
 757 void wxApp::ExitMainLoop()
 758 {
 759   m_keepGoing = FALSE;
 760 }
 761
 762 bool wxApp::Pending()
 763 {
 764   return (::PeekMessage(&s_currentMsg, 0, 0, 0, PM_NOREMOVE) != 0) ;
 765 }
 766
 767 void wxApp::Dispatch()
 768 {
 769     if (!DoMessage())
 770       m_keepGoing = FALSE;
 771 }
 772
 773 /*
 774  * Give all windows a chance to preprocess
 775  * the message. Some may have accelerator tables, or have
 776  * MDI complications.
 777  */
 778 bool wxApp::ProcessMessage(WXMSG *Msg)
 779 {
 780   MSG *msg = (MSG *)Msg;
 781
 782   HWND hWnd;
 783
 784   // Try translations first; find the youngest window with
 785   // a translation table.
 786   for (hWnd = msg->hwnd; hWnd != NULL; hWnd = ::GetParent(hWnd))
 787   {
 788     wxWindow *wnd = wxFindWinFromHandle((WXHWND) hWnd);
 789     if (wnd)
 790     {
 791        if (wnd->MSWTranslateMessage(Msg))
 792          return TRUE;
 793     }
 794   }
 795
 796   // Anyone for a non-translation message? Try youngest descendants first.
 797   for (hWnd = msg->hwnd; hWnd != NULL; hWnd = ::GetParent(hWnd))
 798   {
 799     wxWindow *wnd = wxFindWinFromHandle((WXHWND) hWnd);
 800     if (wnd)
 801     {
 802        if (wnd->MSWProcessMessage(Msg))
 803          return TRUE;
 804     }
 805   }
 806   return FALSE;
 807 }
 808
 809 void wxApp::OnIdle(wxIdleEvent& event)
 810 {
 811   static bool inOnIdle = FALSE;
 812
 813   // Avoid recursion (via ProcessEvent default case)
 814   if (inOnIdle)
 815     return;
 816
 817   inOnIdle = TRUE;
 818
 819   // 'Garbage' collection of windows deleted with Close().
 820   DeletePendingObjects();
 821
 822   // flush the logged messages if any
 823   wxLog *pLog = wxLog::GetActiveTarget();
 824   if ( pLog != NULL && pLog->HasPendingMessages() )
 825     pLog->Flush();
 826
 827   // Send OnIdle events to all windows
 828   bool needMore = SendIdleEvents();
 829 //  bool needMore = FALSE;
 830
 831   if (needMore)
 832     event.RequestMore(TRUE);
 833
 834   inOnIdle = FALSE;
 835 }
 836
 837 // Send idle event to all top-level windows
 838 bool wxApp::SendIdleEvents()
 839 {
 840     bool needMore = FALSE;
 841   wxNode* node = wxTopLevelWindows.First();
 842   while (node)
 843   {
 844     wxWindow* win = (wxWindow*) node->Data();
 845     if (SendIdleEvents(win))
 846             needMore = TRUE;
 847
 848     node = node->Next();
 849   }
 850     return needMore;
 851 }
 852
 853 // Send idle event to window and all subwindows
 854 bool wxApp::SendIdleEvents(wxWindow* win)
 855 {
 856   bool needMore = FALSE;
 857
 858   wxIdleEvent event;
 859   event.SetEventObject(win);
 860   win->ProcessEvent(event);
 861
 862   if (event.MoreRequested())
 863     needMore = TRUE;
 864
 865   wxNode* node = win->GetChildren()->First();
 866   while (node)
 867   {
 868     wxWindow* win = (wxWindow*) node->Data();
 869     if (SendIdleEvents(win))
 870       needMore = TRUE;
 871
 872     node = node->Next();
 873   }
 874   return needMore ;
 875 }
 876
 877 void wxApp::DeletePendingObjects()
 878 {
 879   wxNode *node = wxPendingDelete.First();
 880   while (node)
 881   {
 882     wxObject *obj = (wxObject *)node->Data();
 883
 884     delete obj;
 885
 886     if (wxPendingDelete.Member(obj))
 887       delete node;
 888
 889     // Deleting one object may have deleted other pending
 890     // objects, so start from beginning of list again.
 891     node = wxPendingDelete.First();
 892   }
 893 }
 894
 895 wxLog* wxApp::CreateLogTarget()
 896 {
 897     return new wxLogGui;
 898 }
 899
 900 wxWindow* wxApp::GetTopWindow() const
 901 {
 902     if (m_topWindow)
 903         return m_topWindow;
 904     else if (wxTopLevelWindows.Number() > 0)
 905         return (wxWindow*) wxTopLevelWindows.First()->Data();
 906     else
 907         return NULL;
 908 }
 909
 910 int wxApp::GetComCtl32Version() const
 911 {
 912     // have we loaded COMCTL32 yet?
 913     HMODULE theModule = ::GetModuleHandle("COMCTL32");
 914     int version = 0;
 915
 916     // if so, then we can check for the version
 917     if (theModule)
 918     {
 919         // InitCommonControlsEx is unique to 4.7 and later
 920         FARPROC theProc = ::GetProcAddress(theModule, "InitCommonControlsEx");
 921
 922         if (! theProc)
 923         {                    // not found, must be 4.00
 924       version = 400;
 925         }
 926         else
 927         {
 928       // The following symbol are unique to 4.71
 929       //   DllInstall
 930       //   FlatSB_EnableScrollBar FlatSB_GetScrollInfo FlatSB_GetScrollPos
 931       //   FlatSB_GetScrollProp FlatSB_GetScrollRange FlatSB_SetScrollInfo
 932       //   FlatSB_SetScrollPos FlatSB_SetScrollProp FlatSB_SetScrollRange
 933       //   FlatSB_ShowScrollBar
 934       //   _DrawIndirectImageList _DuplicateImageList
 935       //   InitializeFlatSB
 936       //   UninitializeFlatSB
 937       // we could check for any of these - I chose DllInstall
 938       FARPROC theProc = ::GetProcAddress(theModule, "DllInstall");
 939       if (! theProc)
 940       {
 941         // not found, must be 4.70
 942         version = 470;
 943       }
 944       else
 945       {                         // found, must be 4.71
 946         version = 471;
 947       }
 948         }
 949     }
 950     return version;
 951 }
 952
 953 void wxExit()
 954 {
 955   wxApp::CleanUp();
 956   FatalAppExit(0, "Fatal error: exiting");
 957 }
 958
 959 // Yield to incoming messages
 960 bool wxYield()
 961 {
 962   MSG msg;
 963   // We want to go back to the main message loop
 964   // if we see a WM_QUIT. (?)
 965   while (PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE) && msg.message != WM_QUIT)
 966   {
 967     if (!wxTheApp->DoMessage())
 968       break;
 969   }
 970
 971   return TRUE;
 972 }
 973
 974 HINSTANCE wxGetInstance()
 975 {
 976   return wxhInstance;
 977 }
 978
 979 // For some reason, with MSVC++ 1.5, WinMain isn't linked in properly
 980 // if in a separate file. So include it here to ensure it's linked.
 981 #if (defined(_MSC_VER) && !defined(__WIN32__)) || defined(__GNUWIN32__)
 982   #include "main.cpp"
 983 #endif