src/common/appcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/appcmn.cpp
   3 // Purpose:     wxAppBase methods common to all platforms
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     18.10.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Vadim Zeitlin
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "appbase.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/app.h"
  33     #include "wx/intl.h"
  34     #include "wx/list.h"
  35     #if wxUSE_LOG
  36         #include "wx/log.h"
  37     #endif // wxUSE_LOG
  38     #if wxUSE_GUI
  39         #include "wx/msgdlg.h"
  40     #endif // wxUSE_GUI
  41 #endif
  42
  43 #include "wx/cmdline.h"
  44 #include "wx/thread.h"
  45 #include "wx/confbase.h"
  46 #include "wx/tokenzr.h"
  47 #include "wx/utils.h"
  48 #include "wx/msgout.h"
  49
  50 #if wxUSE_GUI
  51     #include "wx/artprov.h"
  52 #endif // wxUSE_GUI
  53
  54 #if !defined(__WXMSW__) || defined(__WXMICROWIN__)
  55   #include  <signal.h>      // for SIGTRAP used by wxTrap()
  56 #endif  //Win/Unix
  57
  58 #if defined(__WXMSW__)
  59   #include  "wx/msw/private.h"  // includes windows.h for MessageBox()
  60 #endif
  61
  62 #if defined(__WXMAC__)
  63   #include  "wx/mac/private.h"  // includes mac headers
  64 #endif
  65
  66 // private functions prototypes
  67 #ifdef __WXDEBUG__
  68     static void LINKAGEMODE SetTraceMasks();
  69 #endif // __WXDEBUG__
  70
  71 // ===========================================================================
  72 // implementation
  73 // ===========================================================================
  74
  75 // ----------------------------------------------------------------------------
  76 // initialization and termination
  77 // ----------------------------------------------------------------------------
  78
  79 wxAppBase::wxAppBase()
  80 {
  81     wxTheApp = (wxApp *)this;
  82
  83 #if WXWIN_COMPATIBILITY_2_2
  84     m_wantDebugOutput = FALSE;
  85 #endif // WXWIN_COMPATIBILITY_2_2
  86
  87 #if wxUSE_GUI
  88     m_topWindow = (wxWindow *)NULL;
  89     m_useBestVisual = FALSE;
  90     m_isActive = TRUE;
  91
  92     // We don't want to exit the app if the user code shows a dialog from its
  93     // OnInit() -- but this is what would happen if we set m_exitOnFrameDelete
  94     // to Yes initially as this dialog would be the last top level window.
  95     // OTOH, if we set it to No initially we'll have to overwrite it with Yes
  96     // when we enter our OnRun() because we do want the default behaviour from
  97     // then on. But this would be a problem if the user code calls
  98     // SetExitOnFrameDelete(FALSE) from OnInit().
  99     //
 100     // So we use the special "Later" value which is such that
 101     // GetExitOnFrameDelete() returns FALSE for it but which we know we can
 102     // safely (i.e. without losing the effect of the users SetExitOnFrameDelete
 103     // call) overwrite in OnRun()
 104     m_exitOnFrameDelete = Later;
 105 #endif // wxUSE_GUI
 106
 107 #ifdef __WXDEBUG__
 108     SetTraceMasks();
 109 #endif
 110 }
 111
 112 wxAppBase::~wxAppBase()
 113 {
 114     // this destructor is required for Darwin
 115 }
 116
 117 #if wxUSE_GUI
 118
 119 bool wxAppBase::OnInitGui()
 120 {
 121 #ifdef __WXUNIVERSAL__
 122     if ( !wxTheme::Get() && !wxTheme::CreateDefault() )
 123         return FALSE;
 124     wxArtProvider *art = wxTheme::Get()->GetArtProvider();
 125     if ( art )
 126         wxArtProvider::PushProvider(art);
 127 #endif // __WXUNIVERSAL__
 128
 129     return TRUE;
 130 }
 131
 132 int wxAppBase::OnRun()
 133 {
 134     // see the comment in ctor: if the initial value hasn't been changed, use
 135     // the default Yes from now on
 136     if ( m_exitOnFrameDelete == Later )
 137     {
 138         m_exitOnFrameDelete = Yes;
 139     }
 140     //else: it has been changed, assume the user knows what he is doing
 141
 142     return MainLoop();
 143 }
 144
 145 #endif // wxUSE_GUI
 146
 147 int wxAppBase::OnExit()
 148 {
 149 #if wxUSE_CONFIG
 150     // delete the config object if any (don't use Get() here, but Set()
 151     // because Get() could create a new config object)
 152     delete wxConfigBase::Set((wxConfigBase *) NULL);
 153 #endif // wxUSE_CONFIG
 154
 155 #ifdef __WXUNIVERSAL__
 156     delete wxTheme::Set(NULL);
 157 #endif // __WXUNIVERSAL__
 158
 159     // use Set(NULL) and not Get() to avoid creating a message output object on
 160     // demand when we just want to delete it
 161     delete wxMessageOutput::Set(NULL);
 162
 163     return 0;
 164 }
 165
 166 // ----------------------------------------------------------------------------
 167 // customization hooks
 168 // ----------------------------------------------------------------------------
 169
 170 #if wxUSE_LOG
 171
 172 wxLog *wxAppBase::CreateLogTarget()
 173 {
 174 #if wxUSE_GUI && wxUSE_LOGGUI && !defined(__WXMICROWIN__)
 175     return new wxLogGui;
 176 #else // !GUI
 177     return new wxLogStderr;
 178 #endif // wxUSE_GUI
 179 }
 180
 181 #endif // wxUSE_LOG
 182
 183 wxMessageOutput *wxAppBase::CreateMessageOutput()
 184 {
 185     // The standard way of printing help on command line arguments (app --help)
 186     // is (according to common practice):
 187     //     - console apps: to stderr (on any platform)
 188     //     - GUI apps: stderr on Unix platforms (!)
 189     //                 message box under Windows and others
 190 #if wxUSE_GUI && !defined(__UNIX__)
 191     // wxMessageOutputMessageBox doesn't work under Motif
 192     #ifdef __WXMOTIF__
 193         return new wxMessageOutputLog;
 194     #else
 195         return new wxMessageOutputMessageBox;
 196     #endif
 197 #else // !wxUSE_GUI || __UNIX__
 198     return new wxMessageOutputStderr;
 199 #endif
 200 }
 201
 202 // ---------------------------------------------------------------------------
 203 // wxAppBase
 204 // ----------------------------------------------------------------------------
 205
 206 void wxAppBase::ProcessPendingEvents()
 207 {
 208     // ensure that we're the only thread to modify the pending events list
 209     wxENTER_CRIT_SECT( *wxPendingEventsLocker );
 210
 211     if ( !wxPendingEvents )
 212     {
 213         wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
 214         return;
 215     }
 216
 217     // iterate until the list becomes empty
 218     wxNode *node = wxPendingEvents->First();
 219     while (node)
 220     {
 221         wxEvtHandler *handler = (wxEvtHandler *)node->Data();
 222         delete node;
 223
 224         // In ProcessPendingEvents(), new handlers might be add
 225         // and we can safely leave the critical section here.
 226         wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
 227         handler->ProcessPendingEvents();
 228         wxENTER_CRIT_SECT( *wxPendingEventsLocker );
 229
 230         node = wxPendingEvents->First();
 231     }
 232
 233     wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
 234 }
 235
 236 // ----------------------------------------------------------------------------
 237 // misc
 238 // ----------------------------------------------------------------------------
 239
 240 #if wxUSE_GUI
 241
 242 void wxAppBase::SetActive(bool active, wxWindow * WXUNUSED(lastFocus))
 243 {
 244     if ( active == m_isActive )
 245         return;
 246
 247     m_isActive = active;
 248
 249     wxActivateEvent event(wxEVT_ACTIVATE_APP, active);
 250     event.SetEventObject(this);
 251
 252     (void)ProcessEvent(event);
 253 }
 254
 255 #endif // wxUSE_GUI
 256
 257 int wxAppBase::FilterEvent(wxEvent& WXUNUSED(event))
 258 {
 259     // process the events normally by default
 260     return -1;
 261 }
 262
 263 // ----------------------------------------------------------------------------
 264 // cmd line parsing
 265 // ----------------------------------------------------------------------------
 266
 267 bool wxAppBase::OnInit()
 268 {
 269 #if wxUSE_CMDLINE_PARSER
 270     wxCmdLineParser parser(argc, argv);
 271
 272     OnInitCmdLine(parser);
 273
 274     bool cont;
 275     switch ( parser.Parse(FALSE /* don't show usage */) )
 276     {
 277         case -1:
 278             cont = OnCmdLineHelp(parser);
 279             break;
 280
 281         case 0:
 282             cont = OnCmdLineParsed(parser);
 283             break;
 284
 285         default:
 286             cont = OnCmdLineError(parser);
 287             break;
 288     }
 289
 290     if ( !cont )
 291         return FALSE;
 292 #endif // wxUSE_CMDLINE_PARSER
 293
 294     return TRUE;
 295 }
 296
 297 #if wxUSE_CMDLINE_PARSER
 298
 299 #define OPTION_VERBOSE _T("verbose")
 300 #define OPTION_THEME   _T("theme")
 301 #define OPTION_MODE    _T("mode")
 302
 303 void wxAppBase::OnInitCmdLine(wxCmdLineParser& parser)
 304 {
 305     // the standard command line options
 306     static const wxCmdLineEntryDesc cmdLineDesc[] =
 307     {
 308         {
 309             wxCMD_LINE_SWITCH,
 310             _T("h"),
 311             _T("help"),
 312             gettext_noop("show this help message"),
 313             wxCMD_LINE_VAL_NONE,
 314             wxCMD_LINE_OPTION_HELP
 315         },
 316
 317 #if wxUSE_LOG
 318         {
 319             wxCMD_LINE_SWITCH,
 320             _T(""),
 321             OPTION_VERBOSE,
 322             gettext_noop("generate verbose log messages"),
 323             wxCMD_LINE_VAL_NONE,
 324             0x0
 325         },
 326 #endif // wxUSE_LOG
 327
 328 #ifdef __WXUNIVERSAL__
 329         {
 330             wxCMD_LINE_OPTION,
 331             _T(""),
 332             OPTION_THEME,
 333             gettext_noop("specify the theme to use"),
 334             wxCMD_LINE_VAL_STRING,
 335             0x0
 336         },
 337 #endif // __WXUNIVERSAL__
 338
 339 #if defined(__WXMGL__)
 340         // VS: this is not specific to wxMGL, all fullscreen (framebuffer) ports
 341         //     should provide this option. That's why it is in common/appcmn.cpp
 342         //     and not mgl/app.cpp
 343         {
 344             wxCMD_LINE_OPTION,
 345             _T(""),
 346             OPTION_MODE,
 347             gettext_noop("specify display mode to use (e.g. 640x480-16)"),
 348             wxCMD_LINE_VAL_STRING,
 349             0x0
 350         },
 351 #endif // __WXMGL__
 352
 353         // terminator
 354         {
 355             wxCMD_LINE_NONE,
 356             _T(""),
 357             _T(""),
 358             _T(""),
 359             wxCMD_LINE_VAL_NONE,
 360             0x0
 361         }
 362     };
 363
 364     parser.SetDesc(cmdLineDesc);
 365 }
 366
 367 bool wxAppBase::OnCmdLineParsed(wxCmdLineParser& parser)
 368 {
 369 #if wxUSE_LOG
 370     if ( parser.Found(OPTION_VERBOSE) )
 371     {
 372         wxLog::SetVerbose(TRUE);
 373     }
 374 #endif // wxUSE_LOG
 375
 376 #ifdef __WXUNIVERSAL__
 377     wxString themeName;
 378     if ( parser.Found(OPTION_THEME, &themeName) )
 379     {
 380         wxTheme *theme = wxTheme::Create(themeName);
 381         if ( !theme )
 382         {
 383             wxLogError(_("Unsupported theme '%s'."), themeName.c_str());
 384
 385             return FALSE;
 386         }
 387
 388         wxTheme::Set(theme);
 389     }
 390 #endif // __WXUNIVERSAL__
 391
 392 #if defined(__WXMGL__)
 393     wxString modeDesc;
 394     if ( parser.Found(OPTION_MODE, &modeDesc) )
 395     {
 396         unsigned w, h, bpp;
 397         if ( wxSscanf(modeDesc.c_str(), _T("%ux%u-%u"), &w, &h, &bpp) != 3 )
 398         {
 399             wxLogError(_("Invalid display mode specification '%s'."), modeDesc.c_str());
 400
 401             return FALSE;
 402         }
 403
 404         if ( !SetDisplayMode(wxDisplayModeInfo(w, h, bpp)) )
 405             return FALSE;
 406     }
 407 #endif // __WXMGL__
 408
 409     return TRUE;
 410 }
 411
 412 bool wxAppBase::OnCmdLineHelp(wxCmdLineParser& parser)
 413 {
 414     parser.Usage();
 415
 416     return FALSE;
 417 }
 418
 419 bool wxAppBase::OnCmdLineError(wxCmdLineParser& parser)
 420 {
 421     parser.Usage();
 422
 423     return FALSE;
 424 }
 425
 426 #endif // wxUSE_CMDLINE_PARSER
 427
 428 // ----------------------------------------------------------------------------
 429 // debugging support
 430 // ----------------------------------------------------------------------------
 431
 432 /* static */
 433 bool wxAppBase::CheckBuildOptions(const wxBuildOptions& opts)
 434 {
 435 #define wxCMP(what)   (what == opts.m_ ## what)
 436
 437     bool
 438 #ifdef __WXDEBUG__
 439     isDebug = TRUE;
 440 #else
 441     isDebug = FALSE;
 442 #endif
 443
 444     int verMaj = wxMAJOR_VERSION,
 445         verMin = wxMINOR_VERSION;
 446
 447     if ( !(wxCMP(isDebug) && wxCMP(verMaj) && wxCMP(verMin)) )
 448     {
 449         wxLogFatalError(_T("Mismatch between the program and library build ")
 450                         _T("versions detected."));
 451
 452         // normally wxLogFatalError doesn't return
 453         return FALSE;
 454     }
 455 #undef wxCMP
 456
 457     return TRUE;
 458 }
 459
 460 #ifdef  __WXDEBUG__
 461
 462 static void LINKAGEMODE SetTraceMasks()
 463 {
 464     wxString mask;
 465     if ( wxGetEnv(wxT("WXTRACE"), &mask) )
 466     {
 467         wxStringTokenizer tkn(mask, wxT(","));
 468         while ( tkn.HasMoreTokens() )
 469             wxLog::AddTraceMask(tkn.GetNextToken());
 470     }
 471 }
 472
 473 // wxASSERT() helper
 474 bool wxAssertIsEqual(int x, int y)
 475 {
 476     return x == y;
 477 }
 478
 479 // break into the debugger
 480 void wxTrap()
 481 {
 482 #if defined(__WXMSW__) && !defined(__WXMICROWIN__)
 483     DebugBreak();
 484 #elif defined(__WXMAC__) && !defined(__DARWIN__)
 485 #if __powerc
 486     Debugger();
 487 #else
 488     SysBreak();
 489 #endif
 490 #elif defined(__UNIX__)
 491     raise(SIGTRAP);
 492 #else
 493     // TODO
 494 #endif // Win/Unix
 495 }
 496
 497
 498 void wxAssert(int cond,
 499                   const wxChar *szFile,
 500                   int nLine,
 501                   const wxChar *szCond,
 502                   const wxChar *szMsg)
 503 {
 504    if ( !cond )
 505           wxOnAssert(szFile, nLine, szCond, szMsg);
 506 }
 507
 508 // show the assert modal dialog
 509 static
 510 void ShowAssertDialog(const wxChar *szFile,
 511                       int nLine,
 512                       const wxChar *szCond,
 513                       const wxChar *szMsg)
 514 {
 515     // this variable can be set to true to suppress "assert failure" messages
 516     static bool s_bNoAsserts = FALSE;
 517
 518     wxChar szBuf[4096];
 519
 520     // make life easier for people using VC++ IDE by using this format: like
 521     // this, clicking on the message will take us immediately to the place of
 522     // the failed assert
 523     wxSnprintf(szBuf, WXSIZEOF(szBuf),
 524                wxT("%s(%d): assert \"%s\" failed"),
 525                szFile, nLine, szCond);
 526
 527     if ( szMsg != NULL )
 528     {
 529         wxStrcat(szBuf, wxT(": "));
 530         wxStrcat(szBuf, szMsg);
 531     }
 532     else // no message given
 533     {
 534         wxStrcat(szBuf, wxT("."));
 535     }
 536
 537     if ( !s_bNoAsserts )
 538     {
 539         // send it to the normal log destination
 540         wxLogDebug(szBuf);
 541
 542 #if (wxUSE_GUI && wxUSE_MSGDLG) || defined(__WXMSW__)
 543         // this message is intentionally not translated - it is for
 544         // developpers only
 545         wxStrcat(szBuf, wxT("\nDo you want to stop the program?\nYou can also choose [Cancel] to suppress further warnings."));
 546
 547         // use the native message box if available: this is more robust than
 548         // using our own
 549 #if defined(__WXMSW__) && !defined(__WXMICROWIN__)
 550         switch ( ::MessageBox(NULL, szBuf, _T("Debug"),
 551                               MB_YESNOCANCEL | MB_ICONSTOP ) )
 552         {
 553             case IDYES:
 554                 wxTrap();
 555                 break;
 556
 557             case IDCANCEL:
 558                 s_bNoAsserts = TRUE;
 559                 break;
 560
 561             //case IDNO: nothing to do
 562         }
 563 #else // !MSW
 564         switch ( wxMessageBox(szBuf, wxT("Debug"),
 565                               wxYES_NO | wxCANCEL | wxICON_STOP ) )
 566         {
 567             case wxYES:
 568                 wxTrap();
 569                 break;
 570
 571             case wxCANCEL:
 572                 s_bNoAsserts = TRUE;
 573                 break;
 574
 575             //case wxNO: nothing to do
 576         }
 577 #endif // GUI or MSW
 578
 579 #else // !GUI
 580         wxTrap();
 581 #endif // GUI/!GUI
 582     }
 583 }
 584
 585 // this function is called when an assert fails
 586 void wxOnAssert(const wxChar *szFile,
 587                 int nLine,
 588                 const wxChar *szCond,
 589                 const wxChar *szMsg)
 590 {
 591     // FIXME MT-unsafe
 592     static bool s_bInAssert = FALSE;
 593
 594     if ( s_bInAssert )
 595     {
 596         // He-e-e-e-elp!! we're trapped in endless loop
 597         wxTrap();
 598
 599         s_bInAssert = FALSE;
 600
 601         return;
 602     }
 603
 604     s_bInAssert = TRUE;
 605
 606     if ( !wxTheApp )
 607     {
 608         // by default, show the assert dialog box - we can't customize this
 609         // behaviour
 610         ShowAssertDialog(szFile, nLine, szCond, szMsg);
 611     }
 612     else
 613     {
 614         // let the app process it as it wants
 615         wxTheApp->OnAssert(szFile, nLine, szCond, szMsg);
 616     }
 617
 618     s_bInAssert = FALSE;
 619 }
 620
 621 void wxAppBase::OnAssert(const wxChar *file,
 622                          int line,
 623                          const wxChar *cond,
 624                          const wxChar *msg)
 625 {
 626     ShowAssertDialog(file, line, cond, msg);
 627 }
 628
 629 #endif  //WXDEBUG
 630