src/common/appcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/appcmn.cpp
   3 // Purpose:     wxAppConsole and 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 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #if defined(__BORLANDC__)
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/app.h"
  29     #include "wx/window.h"
  30     #include "wx/bitmap.h"
  31     #include "wx/log.h"
  32     #include "wx/msgdlg.h"
  33     #include "wx/confbase.h"
  34     #include "wx/utils.h"
  35     #include "wx/wxcrtvararg.h"
  36 #endif
  37
  38 #include "wx/apptrait.h"
  39 #include "wx/cmdline.h"
  40 #include "wx/msgout.h"
  41 #include "wx/thread.h"
  42 #include "wx/vidmode.h"
  43
  44 #ifdef __WXDEBUG__
  45     #if wxUSE_STACKWALKER
  46         #include "wx/stackwalk.h"
  47     #endif // wxUSE_STACKWALKER
  48 #endif // __WXDEBUG__
  49
  50 #if defined(__WXMSW__)
  51     #include  "wx/msw/private.h"  // includes windows.h for LOGFONT
  52 #endif
  53
  54 #if wxUSE_FONTMAP
  55     #include "wx/fontmap.h"
  56 #endif // wxUSE_FONTMAP
  57
  58 // DLL options compatibility check:
  59 #include "wx/build.h"
  60 WX_CHECK_BUILD_OPTIONS("wxCore")
  61
  62 WXDLLIMPEXP_DATA_CORE(wxList) wxPendingDelete;
  63
  64 // ============================================================================
  65 // wxAppBase implementation
  66 // ============================================================================
  67
  68 // ----------------------------------------------------------------------------
  69 // initialization
  70 // ----------------------------------------------------------------------------
  71
  72 wxAppBase::wxAppBase()
  73 {
  74     m_topWindow = (wxWindow *)NULL;
  75
  76     m_useBestVisual = false;
  77     m_forceTrueColour = false;
  78
  79     m_isActive = true;
  80
  81     // We don't want to exit the app if the user code shows a dialog from its
  82     // OnInit() -- but this is what would happen if we set m_exitOnFrameDelete
  83     // to Yes initially as this dialog would be the last top level window.
  84     // OTOH, if we set it to No initially we'll have to overwrite it with Yes
  85     // when we enter our OnRun() because we do want the default behaviour from
  86     // then on. But this would be a problem if the user code calls
  87     // SetExitOnFrameDelete(false) from OnInit().
  88     //
  89     // So we use the special "Later" value which is such that
  90     // GetExitOnFrameDelete() returns false for it but which we know we can
  91     // safely (i.e. without losing the effect of the users SetExitOnFrameDelete
  92     // call) overwrite in OnRun()
  93     m_exitOnFrameDelete = Later;
  94 }
  95
  96 bool wxAppBase::Initialize(int& argcOrig, wxChar **argvOrig)
  97 {
  98     if ( !wxAppConsole::Initialize(argcOrig, argvOrig) )
  99         return false;
 100
 101     wxInitializeStockLists();
 102
 103     wxBitmap::InitStandardHandlers();
 104
 105     return true;
 106 }
 107
 108 // ----------------------------------------------------------------------------
 109 // cleanup
 110 // ----------------------------------------------------------------------------
 111
 112 wxAppBase::~wxAppBase()
 113 {
 114     // this destructor is required for Darwin
 115 }
 116
 117 void wxAppBase::CleanUp()
 118 {
 119     // clean up all the pending objects
 120     DeletePendingObjects();
 121
 122     // and any remaining TLWs (they remove themselves from wxTopLevelWindows
 123     // when destroyed, so iterate until none are left)
 124     while ( !wxTopLevelWindows.empty() )
 125     {
 126         // do not use Destroy() here as it only puts the TLW in pending list
 127         // but we want to delete them now
 128         delete wxTopLevelWindows.GetFirst()->GetData();
 129     }
 130
 131     // undo everything we did in Initialize() above
 132     wxBitmap::CleanUpHandlers();
 133
 134     wxStockGDI::DeleteAll();
 135
 136     wxDeleteStockLists();
 137
 138     delete wxTheColourDatabase;
 139     wxTheColourDatabase = NULL;
 140
 141 #if wxUSE_THREADS
 142     #if wxUSE_VALIDATORS
 143         // If we don't do the following, we get an apparent memory leak.
 144         ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 145     #endif // wxUSE_VALIDATORS
 146 #endif // wxUSE_THREADS
 147
 148     wxAppConsole::CleanUp();
 149 }
 150
 151 // ----------------------------------------------------------------------------
 152 // various accessors
 153 // ----------------------------------------------------------------------------
 154
 155 wxWindow* wxAppBase::GetTopWindow() const
 156 {
 157     wxWindow* window = m_topWindow;
 158     if (window == NULL && wxTopLevelWindows.GetCount() > 0)
 159         window = wxTopLevelWindows.GetFirst()->GetData();
 160     return window;
 161 }
 162
 163 wxVideoMode wxAppBase::GetDisplayMode() const
 164 {
 165     return wxVideoMode();
 166 }
 167
 168 wxLayoutDirection wxAppBase::GetLayoutDirection() const
 169 {
 170 #if wxUSE_INTL
 171     const wxLocale *const locale = wxGetLocale();
 172     if ( locale )
 173     {
 174         const wxLanguageInfo *const
 175             info = wxLocale::GetLanguageInfo(locale->GetLanguage());
 176
 177         if ( info )
 178             return info->LayoutDirection;
 179     }
 180 #endif // wxUSE_INTL
 181
 182     // we don't know
 183     return wxLayout_Default;
 184 }
 185
 186 #if wxUSE_CMDLINE_PARSER
 187
 188 // ----------------------------------------------------------------------------
 189 // GUI-specific command line options handling
 190 // ----------------------------------------------------------------------------
 191
 192 #define OPTION_THEME   "theme"
 193 #define OPTION_MODE    "mode"
 194
 195 void wxAppBase::OnInitCmdLine(wxCmdLineParser& parser)
 196 {
 197     // first add the standard non GUI options
 198     wxAppConsole::OnInitCmdLine(parser);
 199
 200     // the standard command line options
 201     static const wxCmdLineEntryDesc cmdLineGUIDesc[] =
 202     {
 203 #ifdef __WXUNIVERSAL__
 204         {
 205             wxCMD_LINE_OPTION,
 206             NULL,
 207             OPTION_THEME,
 208             gettext_noop("specify the theme to use"),
 209             wxCMD_LINE_VAL_STRING,
 210             0x0
 211         },
 212 #endif // __WXUNIVERSAL__
 213
 214 #if defined(__WXMGL__)
 215         // VS: this is not specific to wxMGL, all fullscreen (framebuffer) ports
 216         //     should provide this option. That's why it is in common/appcmn.cpp
 217         //     and not mgl/app.cpp
 218         {
 219             wxCMD_LINE_OPTION,
 220             NULL,
 221             OPTION_MODE,
 222             gettext_noop("specify display mode to use (e.g. 640x480-16)"),
 223             wxCMD_LINE_VAL_STRING,
 224             0x0
 225         },
 226 #endif // __WXMGL__
 227
 228         // terminator
 229         wxCMD_LINE_DESC_END
 230     };
 231
 232     parser.SetDesc(cmdLineGUIDesc);
 233 }
 234
 235 bool wxAppBase::OnCmdLineParsed(wxCmdLineParser& parser)
 236 {
 237 #ifdef __WXUNIVERSAL__
 238     wxString themeName;
 239     if ( parser.Found(OPTION_THEME, &themeName) )
 240     {
 241         wxTheme *theme = wxTheme::Create(themeName);
 242         if ( !theme )
 243         {
 244             wxLogError(_("Unsupported theme '%s'."), themeName.c_str());
 245             return false;
 246         }
 247
 248         // Delete the defaultly created theme and set the new theme.
 249         delete wxTheme::Get();
 250         wxTheme::Set(theme);
 251     }
 252 #endif // __WXUNIVERSAL__
 253
 254 #if defined(__WXMGL__)
 255     wxString modeDesc;
 256     if ( parser.Found(OPTION_MODE, &modeDesc) )
 257     {
 258         unsigned w, h, bpp;
 259         if ( wxSscanf(modeDesc.c_str(), _T("%ux%u-%u"), &w, &h, &bpp) != 3 )
 260         {
 261             wxLogError(_("Invalid display mode specification '%s'."), modeDesc.c_str());
 262             return false;
 263         }
 264
 265         if ( !SetDisplayMode(wxVideoMode(w, h, bpp)) )
 266             return false;
 267     }
 268 #endif // __WXMGL__
 269
 270     return wxAppConsole::OnCmdLineParsed(parser);
 271 }
 272
 273 #endif // wxUSE_CMDLINE_PARSER
 274
 275 // ----------------------------------------------------------------------------
 276 // OnXXX() hooks
 277 // ----------------------------------------------------------------------------
 278
 279 bool wxAppBase::OnInitGui()
 280 {
 281 #ifdef __WXUNIVERSAL__
 282     if ( !wxTheme::Get() && !wxTheme::CreateDefault() )
 283         return false;
 284 #endif // __WXUNIVERSAL__
 285
 286     return true;
 287 }
 288
 289 int wxAppBase::OnRun()
 290 {
 291     // see the comment in ctor: if the initial value hasn't been changed, use
 292     // the default Yes from now on
 293     if ( m_exitOnFrameDelete == Later )
 294     {
 295         m_exitOnFrameDelete = Yes;
 296     }
 297     //else: it has been changed, assume the user knows what he is doing
 298
 299     return wxAppConsole::OnRun();
 300 }
 301
 302 int wxAppBase::OnExit()
 303 {
 304 #ifdef __WXUNIVERSAL__
 305     delete wxTheme::Set(NULL);
 306 #endif // __WXUNIVERSAL__
 307
 308     return wxAppConsole::OnExit();
 309 }
 310
 311 wxAppTraits *wxAppBase::CreateTraits()
 312 {
 313     return new wxGUIAppTraits;
 314 }
 315
 316 // ----------------------------------------------------------------------------
 317 // misc
 318 // ----------------------------------------------------------------------------
 319
 320 void wxAppBase::SetActive(bool active, wxWindow * WXUNUSED(lastFocus))
 321 {
 322     if ( active == m_isActive )
 323         return;
 324
 325     m_isActive = active;
 326
 327     wxActivateEvent event(wxEVT_ACTIVATE_APP, active);
 328     event.SetEventObject(this);
 329
 330     (void)ProcessEvent(event);
 331 }
 332
 333 // ----------------------------------------------------------------------------
 334 // idle handling
 335 // ----------------------------------------------------------------------------
 336
 337 void wxAppBase::DeletePendingObjects()
 338 {
 339     wxList::compatibility_iterator node = wxPendingDelete.GetFirst();
 340     while (node)
 341     {
 342         wxObject *obj = node->GetData();
 343
 344         // remove it from the list first so that if we get back here somehow
 345         // during the object deletion (e.g. wxYield called from its dtor) we
 346         // wouldn't try to delete it the second time
 347         if ( wxPendingDelete.Member(obj) )
 348             wxPendingDelete.Erase(node);
 349
 350         delete obj;
 351
 352         // Deleting one object may have deleted other pending
 353         // objects, so start from beginning of list again.
 354         node = wxPendingDelete.GetFirst();
 355     }
 356 }
 357
 358 // Returns true if more time is needed.
 359 bool wxAppBase::ProcessIdle()
 360 {
 361     // process pending wx events before sending idle events
 362     ProcessPendingEvents();
 363
 364     wxIdleEvent event;
 365     bool needMore = false;
 366     wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
 367     while (node)
 368     {
 369         wxWindow* win = node->GetData();
 370         if (SendIdleEvents(win, event))
 371             needMore = true;
 372         node = node->GetNext();
 373     }
 374
 375     if (wxAppConsole::ProcessIdle())
 376         needMore = true;
 377
 378     // 'Garbage' collection of windows deleted with Close().
 379     DeletePendingObjects();
 380
 381 #if wxUSE_LOG
 382     // flush the logged messages if any
 383     wxLog::FlushActive();
 384 #endif
 385
 386     wxUpdateUIEvent::ResetUpdateTime();
 387
 388     return needMore;
 389 }
 390
 391 // Send idle event to window and all subwindows
 392 bool wxAppBase::SendIdleEvents(wxWindow* win, wxIdleEvent& event)
 393 {
 394     bool needMore = false;
 395
 396     win->OnInternalIdle();
 397
 398     // should we send idle event to this window?
 399     if ( wxIdleEvent::GetMode() == wxIDLE_PROCESS_ALL ||
 400             win->HasExtraStyle(wxWS_EX_PROCESS_IDLE) )
 401     {
 402         event.SetEventObject(win);
 403         win->GetEventHandler()->ProcessEvent(event);
 404
 405         if (event.MoreRequested())
 406             needMore = true;
 407     }
 408     wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst();
 409     while ( node )
 410     {
 411         wxWindow *child = node->GetData();
 412         if (SendIdleEvents(child, event))
 413             needMore = true;
 414
 415         node = node->GetNext();
 416     }
 417
 418     return needMore;
 419 }
 420
 421 // ----------------------------------------------------------------------------
 422 // wxGUIAppTraitsBase
 423 // ----------------------------------------------------------------------------
 424
 425 #if wxUSE_LOG
 426
 427 wxLog *wxGUIAppTraitsBase::CreateLogTarget()
 428 {
 429 // DE: One day I'll remove this but right now the generic dialog used for this
 430 // just doesn't work right at all on wxCocoa.
 431 #if wxUSE_LOGGUI && !defined(__WXCOCOA__)
 432     return new wxLogGui;
 433 #else
 434     // we must have something!
 435     return new wxLogStderr;
 436 #endif
 437 }
 438
 439 #endif // wxUSE_LOG
 440
 441 wxMessageOutput *wxGUIAppTraitsBase::CreateMessageOutput()
 442 {
 443     // The standard way of printing help on command line arguments (app --help)
 444     // is (according to common practice):
 445     //     - console apps: to stderr (on any platform)
 446     //     - GUI apps: stderr on Unix platforms (!)
 447     //                 message box under Windows and others
 448 #ifdef __UNIX__
 449     return new wxMessageOutputStderr;
 450 #else // !__UNIX__
 451     // wxMessageOutputMessageBox doesn't work under Motif
 452     #ifdef __WXMOTIF__
 453         return new wxMessageOutputLog;
 454     #elif wxUSE_MSGDLG
 455         return new wxMessageOutputMessageBox;
 456     #else
 457         return new wxMessageOutputStderr;
 458     #endif
 459 #endif // __UNIX__/!__UNIX__
 460 }
 461
 462 #if wxUSE_FONTMAP
 463
 464 wxFontMapper *wxGUIAppTraitsBase::CreateFontMapper()
 465 {
 466     return new wxFontMapper;
 467 }
 468
 469 #endif // wxUSE_FONTMAP
 470
 471 wxRendererNative *wxGUIAppTraitsBase::CreateRenderer()
 472 {
 473     // use the default native renderer by default
 474     return NULL;
 475 }
 476
 477 #ifdef __WXDEBUG__
 478
 479 bool wxGUIAppTraitsBase::ShowAssertDialog(const wxString& msg)
 480 {
 481 #if defined(__WXMSW__) || !wxUSE_MSGDLG
 482     // under MSW we prefer to use the base class version using ::MessageBox()
 483     // even if wxMessageBox() is available because it has less chances to
 484     // double fault our app than our wxMessageBox()
 485     return wxAppTraitsBase::ShowAssertDialog(msg);
 486 #else // wxUSE_MSGDLG
 487     wxString msgDlg = msg;
 488
 489 #if wxUSE_STACKWALKER
 490     // on Unix stack frame generation may take some time, depending on the
 491     // size of the executable mainly... warn the user that we are working
 492     wxFprintf(stderr, wxT("[Debug] Generating a stack trace... please wait"));
 493     fflush(stderr);
 494
 495     const wxString stackTrace = GetAssertStackTrace();
 496     if ( !stackTrace.empty() )
 497         msgDlg << _T("\n\nCall stack:\n") << stackTrace;
 498 #endif // wxUSE_STACKWALKER
 499
 500     // this message is intentionally not translated -- it is for
 501     // developpers only
 502     msgDlg += wxT("\nDo you want to stop the program?\n")
 503               wxT("You can also choose [Cancel] to suppress ")
 504               wxT("further warnings.");
 505
 506     switch ( wxMessageBox(msgDlg, wxT("wxWidgets Debug Alert"),
 507                           wxYES_NO | wxCANCEL | wxICON_STOP ) )
 508     {
 509         case wxYES:
 510             wxTrap();
 511             break;
 512
 513         case wxCANCEL:
 514             // no more asserts
 515             return true;
 516
 517         //case wxNO: nothing to do
 518     }
 519
 520     return false;
 521 #endif // !wxUSE_MSGDLG/wxUSE_MSGDLG
 522 }
 523
 524 #endif // __WXDEBUG__
 525
 526 bool wxGUIAppTraitsBase::HasStderr()
 527 {
 528     // we consider that under Unix stderr always goes somewhere, even if the
 529     // user doesn't always see it under GUI desktops
 530 #ifdef __UNIX__
 531     return true;
 532 #else
 533     return false;
 534 #endif
 535 }
 536
 537 void wxGUIAppTraitsBase::ScheduleForDestroy(wxObject *object)
 538 {
 539     if ( !wxPendingDelete.Member(object) )
 540         wxPendingDelete.Append(object);
 541 }
 542
 543 void wxGUIAppTraitsBase::RemoveFromPendingDelete(wxObject *object)
 544 {
 545     wxPendingDelete.DeleteObject(object);
 546 }
 547
 548 #if wxUSE_SOCKETS
 549
 550 #if defined(__WINDOWS__)
 551     #include "wx/msw/gsockmsw.h"
 552 #elif defined(__UNIX__) || defined(__DARWIN__) || defined(__OS2__)
 553     #include "wx/unix/gsockunx.h"
 554 #elif defined(__WXMAC__)
 555     #include <MacHeaders.c>
 556     #define OTUNIXERRORS 1
 557     #include <OpenTransport.h>
 558     #include <OpenTransportProviders.h>
 559     #include <OpenTptInternet.h>
 560
 561     #include "wx/mac/gsockmac.h"
 562 #else
 563     #error "Must include correct GSocket header here"
 564 #endif
 565
 566 GSocketGUIFunctionsTable* wxGUIAppTraitsBase::GetSocketGUIFunctionsTable()
 567 {
 568 #if defined(__WXMAC__) && !defined(__DARWIN__)
 569     // NB: wxMac CFM does not have any GUI-specific functions in gsocket.c and
 570     //     so it doesn't need this table at all
 571     return NULL;
 572 #else // !__WXMAC__ || __DARWIN__
 573     static GSocketGUIFunctionsTableConcrete table;
 574     return &table;
 575 #endif // !__WXMAC__ || __DARWIN__
 576 }
 577
 578 #endif