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 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() { return FALSE; }
 146 };
 147
 148 static wxRootWindow *gs_rootWindow = NULL;
 149
 150 //-----------------------------------------------------------------------------
 151 // MGL initialization
 152 //-----------------------------------------------------------------------------
 153
 154 static bool wxCreateMGL_WM(const wxDisplayModeInfo& displayMode)
 155 {
 156     int mode;
 157     int refresh = MGL_DEFAULT_REFRESH;
 158
 159 #if wxUSE_SYSTEM_OPTIONS
 160     if ( wxSystemOptions::HasOption(wxT("mgl.screen-refresh")) )
 161         refresh = wxSystemOptions::GetOptionInt(wxT("mgl.screen-refresh"));
 162 #endif
 163
 164     mode = MGL_findMode(displayMode.GetWidth(),
 165                         displayMode.GetHeight(),
 166                         displayMode.GetDepth());
 167     if ( mode == -1 )
 168     {
 169         wxLogError(_("Mode %ix%i-%i not available."),
 170                      displayMode.GetWidth(),
 171                      displayMode.GetHeight(),
 172                      displayMode.GetDepth());
 173         return FALSE;
 174     }
 175     g_displayDC = new MGLDisplayDC(mode, 1, refresh);
 176     if ( !g_displayDC->isValid() )
 177     {
 178         delete g_displayDC;
 179         g_displayDC = NULL;
 180         return FALSE;
 181     }
 182
 183     g_winMng = MGL_wmCreate(g_displayDC->getDC());
 184     if (!g_winMng)
 185         return FALSE;
 186
 187     return TRUE;
 188 }
 189
 190 static void wxDestroyMGL_WM()
 191 {
 192     if ( g_winMng )
 193     {
 194         MGL_wmDestroy(g_winMng);
 195         g_winMng = NULL;
 196     }
 197     if ( g_displayDC )
 198     {
 199         delete g_displayDC;
 200         g_displayDC = NULL;
 201     }
 202 }
 203
 204 //-----------------------------------------------------------------------------
 205 // wxApp
 206 //-----------------------------------------------------------------------------
 207
 208 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 209
 210 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 211     EVT_IDLE(wxApp::OnIdle)
 212 END_EVENT_TABLE()
 213
 214
 215 wxApp::wxApp() : m_mainLoop(NULL)
 216 {
 217 }
 218
 219 wxApp::~wxApp()
 220 {
 221 }
 222
 223 wxDisplayModeInfo wxGetDefaultDisplayMode()
 224 {
 225     wxString mode;
 226     unsigned w, h, bpp;
 227
 228     if ( !wxGetEnv(wxT("WXMODE"), &mode) ||
 229          (wxSscanf(mode.c_str(), _T("%ux%u-%u"), &w, &h, &bpp) != 3) )
 230     {
 231         w = 640, h = 480, bpp = 16;
 232     }
 233
 234     return wxDisplayModeInfo(w, h, bpp);
 235 }
 236
 237 bool wxApp::SetDisplayMode(const wxDisplayModeInfo& mode)
 238 {
 239     if ( !mode.IsOk() )
 240     {
 241         return FALSE;
 242     }
 243     if ( g_displayDC != NULL )
 244     {
 245         // FIXME_MGL -- we currently don't allow to switch video mode
 246         // more than once. This can hopefully be changed...
 247         wxFAIL_MSG(wxT("Can't change display mode after intialization!"));
 248         return FALSE;
 249     }
 250
 251     if ( !wxCreateMGL_WM(mode) )
 252         return FALSE;
 253     gs_rootWindow = new wxRootWindow;
 254
 255     m_displayMode = mode;
 256
 257     return TRUE;
 258 }
 259
 260 bool wxApp::OnInitGui()
 261 {
 262     if ( !wxAppBase::OnInitGui() )
 263         return FALSE;
 264
 265 #ifdef __WXDEBUG__
 266     // MGL redirects stdout and stderr to physical console, so lets redirect
 267     // it to file. Do it only when WXDEBUG environment variable is set
 268     wxString redirect;
 269     if ( wxGetEnv(wxT("WXSTDERR"), &redirect) )
 270         freopen(redirect.mb_str(), "wt", stderr);
 271 #endif
 272
 273     wxLog *oldLog = wxLog::SetActiveTarget(new wxLogGui);
 274     if ( oldLog ) delete oldLog;
 275
 276     return TRUE;
 277 }
 278
 279 bool wxApp::ProcessIdle()
 280 {
 281     wxIdleEvent event;
 282     event.SetEventObject(this);
 283     ProcessEvent(event);
 284
 285     return event.MoreRequested();
 286 }
 287
 288 void wxApp::OnIdle(wxIdleEvent &event)
 289 {
 290     static bool s_inOnIdle = FALSE;
 291
 292     /* Avoid recursion (via ProcessEvent default case) */
 293     if (s_inOnIdle)
 294         return;
 295
 296     s_inOnIdle = TRUE;
 297
 298     /* Resend in the main thread events which have been prepared in other
 299        threads */
 300     ProcessPendingEvents();
 301
 302     // 'Garbage' collection of windows deleted with Close().
 303     DeletePendingObjects();
 304
 305 #if wxUSE_LOG
 306     // flush the logged messages if any
 307     wxLog::FlushActive();
 308 #endif // wxUSE_LOG
 309
 310     // Send OnIdle events to all windows
 311     if ( SendIdleEvents() )
 312         event.RequestMore(TRUE);
 313
 314     s_inOnIdle = FALSE;
 315 }
 316
 317 bool wxApp::SendIdleEvents()
 318 {
 319     bool needMore = FALSE;
 320
 321     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 322     while (node)
 323     {
 324         wxWindow* win = node->GetData();
 325         if ( SendIdleEvents(win) )
 326             needMore = TRUE;
 327         node = node->GetNext();
 328     }
 329
 330     return needMore;
 331 }
 332
 333 bool wxApp::SendIdleEvents(wxWindow* win)
 334 {
 335     bool needMore = FALSE;
 336
 337     wxIdleEvent event;
 338     event.SetEventObject(win);
 339
 340     win->GetEventHandler()->ProcessEvent(event);
 341
 342     if ( event.MoreRequested() )
 343         needMore = TRUE;
 344
 345     wxNode* node = win->GetChildren().First();
 346     while (node)
 347     {
 348         wxWindow* win = (wxWindow*) node->Data();
 349         if ( SendIdleEvents(win) )
 350             needMore = TRUE;
 351
 352         node = node->Next();
 353     }
 354     return needMore;
 355 }
 356
 357 int wxApp::MainLoop()
 358 {
 359     int rt;
 360     m_mainLoop = new wxEventLoop;
 361
 362     rt = m_mainLoop->Run();
 363
 364     delete m_mainLoop;
 365     m_mainLoop = NULL;
 366     return rt;
 367 }
 368
 369 void wxApp::ExitMainLoop()
 370 {
 371     if ( m_mainLoop )
 372         m_mainLoop->Exit(0);
 373 }
 374
 375 bool wxApp::Initialized()
 376 {
 377     return (wxTopLevelWindows.GetCount() != 0);
 378 }
 379
 380 bool wxApp::Pending()
 381 {
 382     return wxEventLoop::GetActive()->Pending();
 383 }
 384
 385 void wxApp::Dispatch()
 386 {
 387     wxEventLoop::GetActive()->Dispatch();
 388 }
 389
 390 void wxApp::DeletePendingObjects()
 391 {
 392     wxNode *node = wxPendingDelete.First();
 393     while (node)
 394     {
 395         wxObject *obj = (wxObject *)node->Data();
 396
 397         delete obj;
 398
 399         if ( wxPendingDelete.Find(obj) )
 400             delete node;
 401
 402         node = wxPendingDelete.First();
 403     }
 404 }
 405
 406 bool wxApp::Initialize()
 407 {
 408     if ( MGL_init(".", NULL) == 0 )
 409         return FALSE;
 410
 411     wxBuffer = new wxChar[BUFSIZ + 512];
 412
 413     wxClassInfo::InitializeClasses();
 414
 415 #if wxUSE_INTL
 416     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 417 #endif
 418
 419     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 420     // create a module for that as it's part of the core.
 421 #if wxUSE_THREADS
 422     wxPendingEvents = new wxList;
 423     wxPendingEventsLocker = new wxCriticalSection;
 424 #endif
 425
 426     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 427     wxTheColourDatabase->Initialize();
 428
 429     // Can't do this in wxModule, because fonts are needed by stock lists
 430     wxTheFontsManager = new wxFontsManager;
 431
 432     wxInitializeStockLists();
 433     wxInitializeStockObjects();
 434
 435 #if wxUSE_WX_RESOURCES
 436     wxInitializeResourceSystem();
 437 #endif
 438
 439     wxModule::RegisterModules();
 440     if (!wxModule::InitializeModules()) return FALSE;
 441
 442     return TRUE;
 443 }
 444
 445 wxIcon wxApp::GetStdIcon(int which) const
 446 {
 447     return wxTheme::Get()->GetRenderer()->GetStdIcon(which);
 448 }
 449
 450 void wxApp::CleanUp()
 451 {
 452 #if wxUSE_LOG
 453     // continuing to use user defined log target is unsafe from now on because
 454     // some resources may be already unavailable, so replace it by something
 455     // more safe
 456     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 457     if ( oldlog )
 458         delete oldlog;
 459 #endif // wxUSE_LOG
 460
 461     delete gs_rootWindow;
 462
 463     wxModule::CleanUpModules();
 464
 465 #if wxUSE_WX_RESOURCES
 466     wxCleanUpResourceSystem();
 467 #endif
 468
 469     if (wxTheColourDatabase)
 470         delete wxTheColourDatabase;
 471
 472     wxTheColourDatabase = (wxColourDatabase*) NULL;
 473
 474     wxDeleteStockObjects();
 475     wxDeleteStockLists();
 476
 477     delete wxTheApp;
 478     wxTheApp = (wxApp*) NULL;
 479
 480
 481     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 482     // create a module for that as it's part of the core.
 483 #if wxUSE_THREADS
 484     delete wxPendingEvents;
 485     delete wxPendingEventsLocker;
 486 #endif
 487
 488     wxClassInfo::CleanUpClasses();
 489
 490     // Can't do this in wxModule, because fonts are needed by stock lists
 491     // (do it after deleting wxTheApp and cleaning modules up, since somebody
 492     // may be deleting fonts that lately)
 493     delete wxTheFontsManager;
 494     wxTheFontsManager = (wxFontsManager*) NULL;
 495
 496     delete[] wxBuffer;
 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 }