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/bitmap.h"
  30     #include "wx/intl.h"
  31     #include "wx/list.h"
  32     #include "wx/log.h"
  33     #include "wx/msgdlg.h"
  34     #include "wx/bitmap.h"
  35     #include "wx/confbase.h"
  36 #endif
  37
  38 #include "wx/apptrait.h"
  39 #include "wx/cmdline.h"
  40 #include "wx/evtloop.h"
  41 #include "wx/msgout.h"
  42 #include "wx/thread.h"
  43 #include "wx/utils.h"
  44 #include "wx/ptr_scpd.h"
  45
  46 #if defined(__WXMSW__)
  47     #include  "wx/msw/private.h"  // includes windows.h for LOGFONT
  48 #endif
  49
  50 #if wxUSE_FONTMAP
  51     #include "wx/fontmap.h"
  52 #endif // wxUSE_FONTMAP
  53
  54 // DLL options compatibility check:
  55 #include "wx/build.h"
  56 WX_CHECK_BUILD_OPTIONS("wxCore")
  57
  58
  59 // ----------------------------------------------------------------------------
  60 // wxEventLoopPtr
  61 // ----------------------------------------------------------------------------
  62
  63 // this defines wxEventLoopPtr
  64 wxDEFINE_TIED_SCOPED_PTR_TYPE(wxEventLoop)
  65
  66 // ============================================================================
  67 // wxAppBase implementation
  68 // ============================================================================
  69
  70 // ----------------------------------------------------------------------------
  71 // initialization
  72 // ----------------------------------------------------------------------------
  73
  74 wxAppBase::wxAppBase()
  75 {
  76     m_topWindow = (wxWindow *)NULL;
  77     m_useBestVisual = false;
  78     m_isActive = true;
  79
  80 #if wxUSE_EVTLOOP_IN_APP
  81     m_mainLoop = NULL;
  82 #endif // wxUSE_EVTLOOP_IN_APP
  83
  84     // We don't want to exit the app if the user code shows a dialog from its
  85     // OnInit() -- but this is what would happen if we set m_exitOnFrameDelete
  86     // to Yes initially as this dialog would be the last top level window.
  87     // OTOH, if we set it to No initially we'll have to overwrite it with Yes
  88     // when we enter our OnRun() because we do want the default behaviour from
  89     // then on. But this would be a problem if the user code calls
  90     // SetExitOnFrameDelete(false) from OnInit().
  91     //
  92     // So we use the special "Later" value which is such that
  93     // GetExitOnFrameDelete() returns false for it but which we know we can
  94     // safely (i.e. without losing the effect of the users SetExitOnFrameDelete
  95     // call) overwrite in OnRun()
  96     m_exitOnFrameDelete = Later;
  97 }
  98
  99 bool wxAppBase::Initialize(int& argcOrig, wxChar **argvOrig)
 100 {
 101     if ( !wxAppConsole::Initialize(argcOrig, argvOrig) )
 102         return false;
 103
 104 #if wxUSE_THREADS
 105     wxPendingEventsLocker = new wxCriticalSection;
 106 #endif
 107
 108     wxInitializeStockLists();
 109     wxInitializeStockObjects();
 110
 111     wxBitmap::InitStandardHandlers();
 112
 113     return true;
 114 }
 115
 116 // ----------------------------------------------------------------------------
 117 // cleanup
 118 // ----------------------------------------------------------------------------
 119
 120 wxAppBase::~wxAppBase()
 121 {
 122     // this destructor is required for Darwin
 123 }
 124
 125 void wxAppBase::CleanUp()
 126 {
 127     // clean up all the pending objects
 128     DeletePendingObjects();
 129
 130     // and any remaining TLWs (they remove themselves from wxTopLevelWindows
 131     // when destroyed, so iterate until none are left)
 132     while ( !wxTopLevelWindows.empty() )
 133     {
 134         // do not use Destroy() here as it only puts the TLW in pending list
 135         // but we want to delete them now
 136         delete wxTopLevelWindows.GetFirst()->GetData();
 137     }
 138
 139     // undo everything we did in Initialize() above
 140     wxBitmap::CleanUpHandlers();
 141
 142     wxDeleteStockObjects();
 143
 144     wxDeleteStockLists();
 145
 146     delete wxTheColourDatabase;
 147     wxTheColourDatabase = NULL;
 148
 149     delete wxPendingEvents;
 150     wxPendingEvents = NULL;
 151
 152 #if wxUSE_THREADS
 153     delete wxPendingEventsLocker;
 154     wxPendingEventsLocker = NULL;
 155
 156     #if wxUSE_VALIDATORS
 157         // If we don't do the following, we get an apparent memory leak.
 158         ((wxEvtHandler&) wxDefaultValidator).ClearEventLocker();
 159     #endif // wxUSE_VALIDATORS
 160 #endif // wxUSE_THREADS
 161 }
 162
 163 #if wxUSE_CMDLINE_PARSER
 164
 165 // ----------------------------------------------------------------------------
 166 // GUI-specific command line options handling
 167 // ----------------------------------------------------------------------------
 168
 169 #define OPTION_THEME   _T("theme")
 170 #define OPTION_MODE    _T("mode")
 171
 172 void wxAppBase::OnInitCmdLine(wxCmdLineParser& parser)
 173 {
 174     // first add the standard non GUI options
 175     wxAppConsole::OnInitCmdLine(parser);
 176
 177     // the standard command line options
 178     static const wxCmdLineEntryDesc cmdLineGUIDesc[] =
 179     {
 180 #ifdef __WXUNIVERSAL__
 181         {
 182             wxCMD_LINE_OPTION,
 183             wxEmptyString,
 184             OPTION_THEME,
 185             gettext_noop("specify the theme to use"),
 186             wxCMD_LINE_VAL_STRING,
 187             0x0
 188         },
 189 #endif // __WXUNIVERSAL__
 190
 191 #if defined(__WXMGL__)
 192         // VS: this is not specific to wxMGL, all fullscreen (framebuffer) ports
 193         //     should provide this option. That's why it is in common/appcmn.cpp
 194         //     and not mgl/app.cpp
 195         {
 196             wxCMD_LINE_OPTION,
 197             wxEmptyString,
 198             OPTION_MODE,
 199             gettext_noop("specify display mode to use (e.g. 640x480-16)"),
 200             wxCMD_LINE_VAL_STRING,
 201             0x0
 202         },
 203 #endif // __WXMGL__
 204
 205         // terminator
 206         {
 207             wxCMD_LINE_NONE,
 208             wxEmptyString,
 209             wxEmptyString,
 210             wxEmptyString,
 211             wxCMD_LINE_VAL_NONE,
 212             0x0
 213         }
 214     };
 215
 216     parser.SetDesc(cmdLineGUIDesc);
 217 }
 218
 219 bool wxAppBase::OnCmdLineParsed(wxCmdLineParser& parser)
 220 {
 221 #ifdef __WXUNIVERSAL__
 222     wxString themeName;
 223     if ( parser.Found(OPTION_THEME, &themeName) )
 224     {
 225         wxTheme *theme = wxTheme::Create(themeName);
 226         if ( !theme )
 227         {
 228             wxLogError(_("Unsupported theme '%s'."), themeName.c_str());
 229             return false;
 230         }
 231
 232         // Delete the defaultly created theme and set the new theme.
 233         delete wxTheme::Get();
 234         wxTheme::Set(theme);
 235     }
 236 #endif // __WXUNIVERSAL__
 237
 238 #if defined(__WXMGL__)
 239     wxString modeDesc;
 240     if ( parser.Found(OPTION_MODE, &modeDesc) )
 241     {
 242         unsigned w, h, bpp;
 243         if ( wxSscanf(modeDesc.c_str(), _T("%ux%u-%u"), &w, &h, &bpp) != 3 )
 244         {
 245             wxLogError(_("Invalid display mode specification '%s'."), modeDesc.c_str());
 246             return false;
 247         }
 248
 249         if ( !SetDisplayMode(wxVideoMode(w, h, bpp)) )
 250             return false;
 251     }
 252 #endif // __WXMGL__
 253
 254     return wxAppConsole::OnCmdLineParsed(parser);
 255 }
 256
 257 #endif // wxUSE_CMDLINE_PARSER
 258
 259 // ----------------------------------------------------------------------------
 260 // main event loop implementation
 261 // ----------------------------------------------------------------------------
 262
 263 int wxAppBase::MainLoop()
 264 {
 265 #if wxUSE_EVTLOOP_IN_APP
 266     wxEventLoopTiedPtr mainLoop(&m_mainLoop, new wxEventLoop);
 267
 268     return m_mainLoop->Run();
 269 #else // !wxUSE_EVTLOOP_IN_APP
 270     return 0;
 271 #endif // wxUSE_EVTLOOP_IN_APP/!wxUSE_EVTLOOP_IN_APP
 272 }
 273
 274 void wxAppBase::ExitMainLoop()
 275 {
 276 #if wxUSE_EVTLOOP_IN_APP
 277     // we should exit from the main event loop, not just any currently active
 278     // (e.g. modal dialog) event loop
 279     if ( m_mainLoop && m_mainLoop->IsRunning() )
 280     {
 281         m_mainLoop->Exit(0);
 282     }
 283 #endif // wxUSE_EVTLOOP_IN_APP
 284 }
 285
 286 bool wxAppBase::Pending()
 287 {
 288 #if wxUSE_EVTLOOP_IN_APP
 289     // use the currently active message loop here, not m_mainLoop, because if
 290     // we're showing a modal dialog (with its own event loop) currently the
 291     // main event loop is not running anyhow
 292     wxEventLoop * const loop = wxEventLoop::GetActive();
 293
 294     return loop && loop->Pending();
 295 #else // wxUSE_EVTLOOP_IN_APP
 296     return false;
 297 #endif // wxUSE_EVTLOOP_IN_APP/!wxUSE_EVTLOOP_IN_APP
 298 }
 299
 300 bool wxAppBase::Dispatch()
 301 {
 302 #if wxUSE_EVTLOOP_IN_APP
 303     // see comment in Pending()
 304     wxEventLoop * const loop = wxEventLoop::GetActive();
 305
 306     return loop && loop->Dispatch();
 307 #else // wxUSE_EVTLOOP_IN_APP
 308     return true;
 309 #endif // wxUSE_EVTLOOP_IN_APP/!wxUSE_EVTLOOP_IN_APP
 310 }
 311
 312 // ----------------------------------------------------------------------------
 313 // OnXXX() hooks
 314 // ----------------------------------------------------------------------------
 315
 316 bool wxAppBase::OnInitGui()
 317 {
 318 #ifdef __WXUNIVERSAL__
 319     if ( !wxTheme::Get() && !wxTheme::CreateDefault() )
 320         return false;
 321 #endif // __WXUNIVERSAL__
 322
 323     return true;
 324 }
 325
 326 int wxAppBase::OnRun()
 327 {
 328     // see the comment in ctor: if the initial value hasn't been changed, use
 329     // the default Yes from now on
 330     if ( m_exitOnFrameDelete == Later )
 331     {
 332         m_exitOnFrameDelete = Yes;
 333     }
 334     //else: it has been changed, assume the user knows what he is doing
 335
 336     return MainLoop();
 337 }
 338
 339 int wxAppBase::OnExit()
 340 {
 341 #ifdef __WXUNIVERSAL__
 342     delete wxTheme::Set(NULL);
 343 #endif // __WXUNIVERSAL__
 344
 345     return wxAppConsole::OnExit();
 346 }
 347
 348 void wxAppBase::Exit()
 349 {
 350     ExitMainLoop();
 351 }
 352
 353 wxAppTraits *wxAppBase::CreateTraits()
 354 {
 355     return new wxGUIAppTraits;
 356 }
 357
 358 // ----------------------------------------------------------------------------
 359 // misc
 360 // ----------------------------------------------------------------------------
 361
 362 void wxAppBase::SetActive(bool active, wxWindow * WXUNUSED(lastFocus))
 363 {
 364     if ( active == m_isActive )
 365         return;
 366
 367     m_isActive = active;
 368
 369     wxActivateEvent event(wxEVT_ACTIVATE_APP, active);
 370     event.SetEventObject(this);
 371
 372     (void)ProcessEvent(event);
 373 }
 374
 375 void wxAppBase::DeletePendingObjects()
 376 {
 377     wxList::compatibility_iterator node = wxPendingDelete.GetFirst();
 378     while (node)
 379     {
 380         wxObject *obj = node->GetData();
 381
 382         delete obj;
 383
 384         if (wxPendingDelete.Member(obj))
 385             wxPendingDelete.Erase(node);
 386
 387         // Deleting one object may have deleted other pending
 388         // objects, so start from beginning of list again.
 389         node = wxPendingDelete.GetFirst();
 390     }
 391 }
 392
 393 // Returns true if more time is needed.
 394 bool wxAppBase::ProcessIdle()
 395 {
 396     wxIdleEvent event;
 397     bool needMore = false;
 398     wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
 399     while (node)
 400     {
 401         wxWindow* win = node->GetData();
 402         if (SendIdleEvents(win, event))
 403             needMore = true;
 404         node = node->GetNext();
 405     }
 406
 407     event.SetEventObject(this);
 408     (void) ProcessEvent(event);
 409     if (event.MoreRequested())
 410         needMore = true;
 411
 412     wxUpdateUIEvent::ResetUpdateTime();
 413
 414     return needMore;
 415 }
 416
 417 // Send idle event to window and all subwindows
 418 bool wxAppBase::SendIdleEvents(wxWindow* win, wxIdleEvent& event)
 419 {
 420     bool needMore = false;
 421
 422     win->OnInternalIdle();
 423
 424     if (wxIdleEvent::CanSend(win))
 425     {
 426         event.SetEventObject(win);
 427         win->GetEventHandler()->ProcessEvent(event);
 428
 429         if (event.MoreRequested())
 430             needMore = true;
 431     }
 432     wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst();
 433     while ( node )
 434     {
 435         wxWindow *child = node->GetData();
 436         if (SendIdleEvents(child, event))
 437             needMore = true;
 438
 439         node = node->GetNext();
 440     }
 441
 442     return needMore;
 443 }
 444
 445 void wxAppBase::OnIdle(wxIdleEvent& WXUNUSED(event))
 446 {
 447     // If there are pending events, we must process them: pending events
 448     // are either events to the threads other than main or events posted
 449     // with wxPostEvent() functions
 450     // GRG: I have moved this here so that all pending events are processed
 451     //   before starting to delete any objects. This behaves better (in
 452     //   particular, wrt wxPostEvent) and is coherent with wxGTK's current
 453     //   behaviour. Changed Feb/2000 before 2.1.14
 454     ProcessPendingEvents();
 455
 456     // 'Garbage' collection of windows deleted with Close().
 457     DeletePendingObjects();
 458
 459 #if wxUSE_LOG
 460     // flush the logged messages if any
 461     wxLog::FlushActive();
 462 #endif // wxUSE_LOG
 463
 464 }
 465
 466 // ----------------------------------------------------------------------------
 467 // wxGUIAppTraitsBase
 468 // ----------------------------------------------------------------------------
 469
 470 #if wxUSE_LOG
 471
 472 wxLog *wxGUIAppTraitsBase::CreateLogTarget()
 473 {
 474 #if wxUSE_LOGGUI
 475     return new wxLogGui;
 476 #else
 477     // we must have something!
 478     return new wxLogStderr;
 479 #endif
 480 }
 481
 482 #endif // wxUSE_LOG
 483
 484 wxMessageOutput *wxGUIAppTraitsBase::CreateMessageOutput()
 485 {
 486     // The standard way of printing help on command line arguments (app --help)
 487     // is (according to common practice):
 488     //     - console apps: to stderr (on any platform)
 489     //     - GUI apps: stderr on Unix platforms (!)
 490     //                 message box under Windows and others
 491 #ifdef __UNIX__
 492     return new wxMessageOutputStderr;
 493 #else // !__UNIX__
 494     // wxMessageOutputMessageBox doesn't work under Motif
 495     #ifdef __WXMOTIF__
 496         return new wxMessageOutputLog;
 497     #else
 498         return new wxMessageOutputMessageBox;
 499     #endif
 500 #endif // __UNIX__/!__UNIX__
 501 }
 502
 503 #if wxUSE_FONTMAP
 504
 505 wxFontMapper *wxGUIAppTraitsBase::CreateFontMapper()
 506 {
 507     return new wxFontMapper;
 508 }
 509
 510 #endif // wxUSE_FONTMAP
 511
 512 wxRendererNative *wxGUIAppTraitsBase::CreateRenderer()
 513 {
 514     // use the default native renderer by default
 515     return NULL;
 516 }
 517
 518 #ifdef __WXDEBUG__
 519
 520 bool wxGUIAppTraitsBase::ShowAssertDialog(const wxString& msg)
 521 {
 522     // under MSW we prefer to use the base class version using ::MessageBox()
 523     // even if wxMessageBox() is available because it has less chances to
 524     // double fault our app than our wxMessageBox()
 525 #if defined(__WXMSW__) || !wxUSE_MSGDLG
 526     return wxAppTraitsBase::ShowAssertDialog(msg);
 527 #else // wxUSE_MSGDLG
 528     // this message is intentionally not translated -- it is for
 529     // developpers only
 530     wxString msgDlg(msg);
 531     msgDlg += wxT("\nDo you want to stop the program?\n")
 532               wxT("You can also choose [Cancel] to suppress ")
 533               wxT("further warnings.");
 534
 535     switch ( wxMessageBox(msgDlg, wxT("wxWidgets Debug Alert"),
 536                           wxYES_NO | wxCANCEL | wxICON_STOP ) )
 537     {
 538         case wxYES:
 539             wxTrap();
 540             break;
 541
 542         case wxCANCEL:
 543             // no more asserts
 544             return true;
 545
 546         //case wxNO: nothing to do
 547     }
 548
 549     return false;
 550 #endif // !wxUSE_MSGDLG/wxUSE_MSGDLG
 551 }
 552
 553 #endif // __WXDEBUG__
 554
 555 bool wxGUIAppTraitsBase::HasStderr()
 556 {
 557     // we consider that under Unix stderr always goes somewhere, even if the
 558     // user doesn't always see it under GUI desktops
 559 #ifdef __UNIX__
 560     return true;
 561 #else
 562     return false;
 563 #endif
 564 }
 565
 566 void wxGUIAppTraitsBase::ScheduleForDestroy(wxObject *object)
 567 {
 568     if ( !wxPendingDelete.Member(object) )
 569         wxPendingDelete.Append(object);
 570 }
 571
 572 void wxGUIAppTraitsBase::RemoveFromPendingDelete(wxObject *object)
 573 {
 574     wxPendingDelete.DeleteObject(object);
 575 }
 576
 577 #if wxUSE_SOCKETS
 578
 579 #if defined(__WINDOWS__)
 580     #include "wx/msw/gsockmsw.h"
 581 #elif defined(__UNIX__) || defined(__DARWIN__) || defined(__OS2__)
 582     #include "wx/unix/gsockunx.h"
 583 #elif defined(__WXMAC__)
 584     #include <MacHeaders.c>
 585     #define OTUNIXERRORS 1
 586     #include <OpenTransport.h>
 587     #include <OpenTransportProviders.h>
 588     #include <OpenTptInternet.h>
 589
 590     #include "wx/mac/gsockmac.h"
 591 #else
 592     #error "Must include correct GSocket header here"
 593 #endif
 594
 595 GSocketGUIFunctionsTable* wxGUIAppTraitsBase::GetSocketGUIFunctionsTable()
 596 {
 597 #if defined(__WXMAC__) && !defined(__DARWIN__)
 598     // NB: wxMac CFM does not have any GUI-specific functions in gsocket.c and
 599     //     so it doesn't need this table at all
 600     return NULL;
 601 #else // !__WXMAC__ || __DARWIN__
 602     static GSocketGUIFunctionsTableConcrete table;
 603     return &table;
 604 #endif // !__WXMAC__ || __DARWIN__
 605 }
 606
 607 #endif