src/mgl/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.cpp
   3 // Author:      Vaclav Slavik
   4 //              based on GTK and MSW implementations
   5 // Id:          $Id$
   6 // Copyright:   (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11     #pragma implementation "app.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #ifdef __BORLANDC__
  18     #pragma hdrstop
  19 #endif
  20
  21
  22 #ifndef WX_PRECOMP
  23     #include "wx/settings.h"
  24     #include "wx/module.h"
  25     #include "wx/evtloop.h"
  26     #include "wx/frame.h"
  27     #include "wx/dialog.h"
  28     #include "wx/log.h"
  29     #include "wx/intl.h"
  30     #include "wx/resource.h"
  31 #endif
  32
  33 #include "wx/app.h"
  34 #include "wx/fontutil.h"
  35 #include "wx/univ/theme.h"
  36 #include "wx/univ/renderer.h"
  37 #include "wx/univ/colschem.h"
  38 #include "wx/sysopt.h"
  39 #include "wx/mgl/private.h"
  40
  41 //-----------------------------------------------------------------------------
  42 // Global data
  43 //-----------------------------------------------------------------------------
  44
  45 wxApp *wxTheApp = NULL;
  46 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
  47
  48
  49 //-----------------------------------------------------------------------------
  50 // wxExit
  51 //-----------------------------------------------------------------------------
  52
  53 void wxExit()
  54 {
  55     MGL_exit();
  56     exit(0);
  57 }
  58
  59 //-----------------------------------------------------------------------------
  60 // wxYield
  61 //-----------------------------------------------------------------------------
  62
  63 static bool gs_inYield = FALSE;
  64
  65 bool wxApp::Yield(bool onlyIfNeeded)
  66 {
  67     if ( gs_inYield )
  68     {
  69         if ( !onlyIfNeeded )
  70         {
  71             wxFAIL_MSG( wxT("wxYield called recursively" ) );
  72         }
  73
  74         return FALSE;
  75     }
  76
  77 #if wxUSE_THREADS
  78     if ( !wxThread::IsMain() )
  79     {
  80         // can't process events from other threads, MGL is thread-unsafe
  81         return TRUE;
  82     }
  83 #endif // wxUSE_THREADS
  84
  85     gs_inYield = TRUE;
  86
  87     wxLog::Suspend();
  88
  89     if ( wxEventLoop::GetActive() )
  90     {
  91         while (wxEventLoop::GetActive()->Pending())
  92             wxEventLoop::GetActive()->Dispatch();
  93     }
  94
  95     /* it's necessary to call ProcessIdle() to update the frames sizes which
  96        might have been changed (it also will update other things set from
  97        OnUpdateUI() which is a nice (and desired) side effect) */
  98     while (wxTheApp->ProcessIdle()) { }
  99
 100     wxLog::Resume();
 101
 102     gs_inYield = FALSE;
 103
 104     return TRUE;
 105 }
 106
 107
 108 //-----------------------------------------------------------------------------
 109 // wxWakeUpIdle
 110 //-----------------------------------------------------------------------------
 111
 112 void wxWakeUpIdle()
 113 {
 114 #if wxUSE_THREADS
 115     if (!wxThread::IsMain())
 116         wxMutexGuiEnter();
 117 #endif
 118
 119     while (wxTheApp->ProcessIdle()) {}
 120
 121 #if wxUSE_THREADS
 122     if (!wxThread::IsMain())
 123         wxMutexGuiLeave();
 124 #endif
 125 }
 126
 127 //-----------------------------------------------------------------------------
 128 // Root window
 129 //-----------------------------------------------------------------------------
 130
 131 class wxRootWindow : public wxWindow
 132 {
 133     public:
 134         wxRootWindow() : wxWindow(NULL, -1)
 135         {
 136             SetMGLwindow_t(MGL_wmGetRootWindow(g_winMng));
 137             SetBackgroundColour(wxTHEME_COLOUR(DESKTOP));
 138         }
 139         ~wxRootWindow()
 140         {
 141             // we don't want to delete MGL_WM's rootWnd
 142             m_wnd = NULL;
 143         }
 144
 145         virtual bool AcceptsFocus() const { return FALSE; }
 146
 147         DECLARE_DYNAMIC_CLASS(wxRootWindow)
 148 };
 149
 150 IMPLEMENT_DYNAMIC_CLASS(wxRootWindow, wxWindow)
 151
 152 static wxRootWindow *gs_rootWindow = NULL;
 153
 154 //-----------------------------------------------------------------------------
 155 // MGL initialization
 156 //-----------------------------------------------------------------------------
 157
 158 static bool wxCreateMGL_WM(const wxDisplayModeInfo& displayMode)
 159 {
 160     int mode;
 161     int refresh = MGL_DEFAULT_REFRESH;
 162
 163 #if wxUSE_SYSTEM_OPTIONS
 164     if ( wxSystemOptions::HasOption(wxT("mgl.screen-refresh")) )
 165         refresh = wxSystemOptions::GetOptionInt(wxT("mgl.screen-refresh"));
 166 #endif
 167
 168     mode = MGL_findMode(displayMode.GetWidth(),
 169                         displayMode.GetHeight(),
 170                         displayMode.GetDepth());
 171     if ( mode == -1 )
 172     {
 173         wxLogError(_("Mode %ix%i-%i not available."),
 174                      displayMode.GetWidth(),
 175                      displayMode.GetHeight(),
 176                      displayMode.GetDepth());
 177         return FALSE;
 178     }
 179     g_displayDC = new MGLDisplayDC(mode, 1, refresh);
 180     if ( !g_displayDC->isValid() )
 181     {
 182         delete g_displayDC;
 183         g_displayDC = NULL;
 184         return FALSE;
 185     }
 186
 187     g_winMng = MGL_wmCreate(g_displayDC->getDC());
 188     if (!g_winMng)
 189         return FALSE;
 190
 191     return TRUE;
 192 }
 193
 194 static void wxDestroyMGL_WM()
 195 {
 196     if ( g_winMng )
 197     {
 198         MGL_wmDestroy(g_winMng);
 199         g_winMng = NULL;
 200     }
 201     if ( g_displayDC )
 202     {
 203         delete g_displayDC;
 204         g_displayDC = NULL;
 205     }
 206 }
 207
 208 //-----------------------------------------------------------------------------
 209 // wxApp
 210 //-----------------------------------------------------------------------------
 211
 212 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 213
 214 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 215     EVT_IDLE(wxApp::OnIdle)
 216 END_EVENT_TABLE()
 217
 218
 219 wxApp::wxApp() : m_mainLoop(NULL)
 220 {
 221 }
 222
 223 wxApp::~wxApp()
 224 {
 225 }
 226
 227 wxDisplayModeInfo wxGetDefaultDisplayMode()
 228 {
 229     wxString mode;
 230     unsigned w, h, bpp;
 231
 232     if ( !wxGetEnv(wxT("WXMODE"), &mode) ||
 233          (wxSscanf(mode.c_str(), _T("%ux%u-%u"), &w, &h, &bpp) != 3) )
 234     {
 235         w = 640, h = 480, bpp = 16;
 236     }
 237
 238     return wxDisplayModeInfo(w, h, bpp);
 239 }
 240
 241 bool wxApp::SetDisplayMode(const wxDisplayModeInfo& mode)
 242 {
 243     if ( !mode.IsOk() )
 244     {
 245         return FALSE;
 246     }
 247     if ( g_displayDC != NULL )
 248     {
 249         // FIXME_MGL -- we currently don't allow to switch video mode
 250         // more than once. This can hopefully be changed...
 251         wxFAIL_MSG(wxT("Can't change display mode after intialization!"));
 252         return FALSE;
 253     }
 254
 255     if ( !wxCreateMGL_WM(mode) )
 256         return FALSE;
 257     gs_rootWindow = new wxRootWindow;
 258
 259     m_displayMode = mode;
 260
 261     return TRUE;
 262 }
 263
 264 bool wxApp::OnInitGui()
 265 {
 266     if ( !wxAppBase::OnInitGui() )
 267         return FALSE;
 268
 269 #ifdef __WXDEBUG__
 270     // MGL redirects stdout and stderr to physical console, so lets redirect
 271     // it to file. Do it only when WXDEBUG environment variable is set
 272     wxString redirect;
 273     if ( wxGetEnv(wxT("WXSTDERR"), &redirect) )
 274         freopen(redirect.mb_str(), "wt", stderr);
 275 #endif
 276
 277     wxLog *oldLog = wxLog::SetActiveTarget(new wxLogGui);
 278     if ( oldLog ) delete oldLog;
 279
 280     return TRUE;
 281 }
 282
 283 bool wxApp::ProcessIdle()
 284 {
 285     wxIdleEvent event;
 286     event.SetEventObject(this);
 287     ProcessEvent(event);
 288
 289     return event.MoreRequested();
 290 }
 291
 292 void wxApp::OnIdle(wxIdleEvent &event)
 293 {
 294     static bool s_inOnIdle = FALSE;
 295
 296     /* Avoid recursion (via ProcessEvent default case) */
 297     if (s_inOnIdle)
 298         return;
 299
 300     s_inOnIdle = TRUE;
 301
 302     /* Resend in the main thread events which have been prepared in other
 303        threads */
 304     ProcessPendingEvents();
 305
 306     // 'Garbage' collection of windows deleted with Close().
 307     DeletePendingObjects();
 308
 309 #if wxUSE_LOG
 310     // flush the logged messages if any
 311     wxLog::FlushActive();
 312 #endif // wxUSE_LOG
 313
 314     // Send OnIdle events to all windows
 315     if ( SendIdleEvents() )
 316         event.RequestMore(TRUE);
 317
 318     s_inOnIdle = FALSE;
 319 }
 320
 321 bool wxApp::SendIdleEvents()
 322 {
 323     bool needMore = FALSE;
 324
 325     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 326     while (node)
 327     {
 328         wxWindow* win = node->GetData();
 329         if ( SendIdleEvents(win) )
 330             needMore = TRUE;
 331         node = node->GetNext();
 332     }
 333
 334     return needMore;
 335 }
 336
 337 bool wxApp::SendIdleEvents(wxWindow* win)
 338 {
 339     bool needMore = FALSE;
 340
 341     wxIdleEvent event;
 342     event.SetEventObject(win);
 343
 344     win->GetEventHandler()->ProcessEvent(event);
 345
 346     if ( event.MoreRequested() )
 347         needMore = TRUE;
 348
 349     wxNode* node = win->GetChildren().First();
 350     while (node)
 351     {
 352         wxWindow* win = (wxWindow*) node->Data();
 353         if ( SendIdleEvents(win) )
 354             needMore = TRUE;
 355
 356         node = node->Next();
 357     }
 358     return needMore;
 359 }
 360
 361 int wxApp::MainLoop()
 362 {
 363     int rt;
 364     m_mainLoop = new wxEventLoop;
 365
 366     rt = m_mainLoop->Run();
 367
 368     delete m_mainLoop;
 369     m_mainLoop = NULL;
 370     return rt;
 371 }
 372
 373 void wxApp::ExitMainLoop()
 374 {
 375     if ( m_mainLoop )
 376         m_mainLoop->Exit(0);
 377 }
 378
 379 bool wxApp::Initialized()
 380 {
 381     return (wxTopLevelWindows.GetCount() != 0);
 382 }
 383
 384 bool wxApp::Pending()
 385 {
 386     return wxEventLoop::GetActive()->Pending();
 387 }
 388
 389 void wxApp::Dispatch()
 390 {
 391     wxEventLoop::GetActive()->Dispatch();
 392 }
 393
 394 void wxApp::DeletePendingObjects()
 395 {
 396     wxNode *node = wxPendingDelete.First();
 397     while (node)
 398     {
 399         wxObject *obj = (wxObject *)node->Data();
 400
 401         delete obj;
 402
 403         if ( wxPendingDelete.Find(obj) )
 404             delete node;
 405
 406         node = wxPendingDelete.First();
 407     }
 408 }
 409
 410 bool wxApp::Initialize()
 411 {
 412     if ( MGL_init(".", NULL) == 0 )
 413         return FALSE;
 414
 415     wxClassInfo::InitializeClasses();
 416
 417 #if wxUSE_INTL
 418     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 419 #endif
 420
 421     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 422     // create a module for that as it's part of the core.
 423 #if wxUSE_THREADS
 424     wxPendingEvents = new wxList;
 425     wxPendingEventsLocker = new wxCriticalSection;
 426 #endif
 427
 428     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 429     wxTheColourDatabase->Initialize();
 430
 431     // Can't do this in wxModule, because fonts are needed by stock lists
 432     wxTheFontsManager = new wxFontsManager;
 433
 434     wxInitializeStockLists();
 435     wxInitializeStockObjects();
 436
 437 #if wxUSE_WX_RESOURCES
 438     wxInitializeResourceSystem();
 439 #endif
 440
 441     wxModule::RegisterModules();
 442     if (!wxModule::InitializeModules()) return FALSE;
 443
 444     return TRUE;
 445 }
 446
 447 wxIcon wxApp::GetStdIcon(int which) const
 448 {
 449     return wxTheme::Get()->GetRenderer()->GetStdIcon(which);
 450 }
 451
 452 void wxApp::CleanUp()
 453 {
 454 #if wxUSE_LOG
 455     // continuing to use user defined log target is unsafe from now on because
 456     // some resources may be already unavailable, so replace it by something
 457     // more safe
 458     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 459     if ( oldlog )
 460         delete oldlog;
 461 #endif // wxUSE_LOG
 462
 463     delete gs_rootWindow;
 464
 465     wxModule::CleanUpModules();
 466
 467 #if wxUSE_WX_RESOURCES
 468     wxCleanUpResourceSystem();
 469 #endif
 470
 471     if (wxTheColourDatabase)
 472         delete wxTheColourDatabase;
 473
 474     wxTheColourDatabase = (wxColourDatabase*) NULL;
 475
 476     wxDeleteStockObjects();
 477     wxDeleteStockLists();
 478
 479     delete wxTheApp;
 480     wxTheApp = (wxApp*) NULL;
 481
 482
 483     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 484     // create a module for that as it's part of the core.
 485 #if wxUSE_THREADS
 486     delete wxPendingEvents;
 487     delete wxPendingEventsLocker;
 488 #endif
 489
 490     wxClassInfo::CleanUpClasses();
 491
 492     // Can't do this in wxModule, because fonts are needed by stock lists
 493     // (do it after deleting wxTheApp and cleaning modules up, since somebody
 494     // may be deleting fonts that lately)
 495     delete wxTheFontsManager;
 496     wxTheFontsManager = (wxFontsManager*) NULL;
 497
 498     // check for memory leaks
 499 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 500     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 501     {
 502         wxLogDebug(wxT("There were memory leaks.\n"));
 503         wxDebugContext::Dump();
 504         wxDebugContext::PrintStatistics();
 505     }
 506 #endif // Debug
 507
 508 #if wxUSE_LOG
 509     // do this as the very last thing because everything else can log messages
 510     wxLog::DontCreateOnDemand();
 511
 512     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 513     if (oldLog)
 514         delete oldLog;
 515 #endif // wxUSE_LOG
 516
 517     wxDestroyMGL_WM();
 518     MGL_exit();
 519 }
 520
 521
 522 int wxEntryStart(int argc, char *argv[])
 523 {
 524     return wxApp::Initialize() ? 0 : -1;
 525 }
 526
 527
 528 int wxEntryInitGui()
 529 {
 530     return wxTheApp->OnInitGui() ? 0 : -1;
 531 }
 532
 533
 534 void wxEntryCleanup()
 535 {
 536     wxApp::CleanUp();
 537 }
 538
 539
 540
 541 int wxEntry(int argc, char *argv[])
 542 {
 543 #ifdef __DJGPP__
 544     // VS: disable long filenames under DJGPP as the very first thing,
 545     //     since SciTech MGL doesn't like them much...
 546     wxSetEnv(wxT("LFN"), wxT("N"));
 547 #endif
 548
 549 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 550     // This seems to be necessary since there are 'rogue'
 551     // objects present at this point (perhaps global objects?)
 552     // Setting a checkpoint will ignore them as far as the
 553     // memory checking facility is concerned.
 554     // Of course you may argue that memory allocated in globals should be
 555     // checked, but this is a reasonable compromise.
 556     wxDebugContext::SetCheckpoint();
 557 #endif
 558     int err = wxEntryStart(argc, argv);
 559     if ( err )
 560         return err;
 561
 562     if ( !wxTheApp )
 563     {
 564         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 565                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 566
 567         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 568
 569         wxObject *test_app = app_ini();
 570
 571         wxTheApp = (wxApp*) test_app;
 572     }
 573
 574     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 575
 576     wxTheApp->argc = argc;
 577 #if wxUSE_UNICODE
 578     wxTheApp->argv = new wxChar*[argc+1];
 579     int mb_argc = 0;
 580     while (mb_argc < argc)
 581     {
 582         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 583         mb_argc++;
 584     }
 585     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 586 #else
 587     wxTheApp->argv = argv;
 588 #endif
 589
 590     wxString name(wxFileNameFromPath(argv[0]));
 591     wxStripExtension(name);
 592     wxTheApp->SetAppName(name);
 593
 594     int retValue;
 595     retValue = wxEntryInitGui();
 596
 597     // Here frames insert themselves automatically into wxTopLevelWindows by
 598     // getting created in OnInit().
 599     if ( retValue == 0 )
 600     {
 601         if ( !wxTheApp->OnInit() )
 602             retValue = -1;
 603     }
 604
 605     if ( retValue == 0 )
 606     {
 607         /* delete pending toplevel windows (typically a single
 608            dialog) so that, if there isn't any left, we don't
 609            call OnRun() */
 610         wxTheApp->DeletePendingObjects();
 611
 612         if ( wxTheApp->Initialized() )
 613         {
 614             wxTheApp->OnRun();
 615
 616             wxWindow *topWindow = wxTheApp->GetTopWindow();
 617             if ( topWindow )
 618             {
 619                 /* Forcibly delete the window. */
 620                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 621                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 622                 {
 623                     topWindow->Close(TRUE);
 624                     wxTheApp->DeletePendingObjects();
 625                 }
 626                 else
 627                 {
 628                     delete topWindow;
 629                     wxTheApp->SetTopWindow((wxWindow*) NULL);
 630                 }
 631             }
 632
 633 #if wxUSE_LOG
 634             // flush the logged messages if any
 635             wxLog *log = wxLog::GetActiveTarget();
 636             if (log != NULL && log->HasPendingMessages())
 637                 log->Flush();
 638 #endif // wxUSE_LOG
 639             retValue = wxTheApp->OnExit();
 640         }
 641     }
 642
 643     wxEntryCleanup();
 644
 645     return retValue;
 646 }