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 #ifndef WX_PRECOMP
  22     #include "wx/settings.h"
  23     #include "wx/module.h"
  24     #include "wx/evtloop.h"
  25     #include "wx/frame.h"
  26     #include "wx/dialog.h"
  27     #include "wx/intl.h"
  28 #endif
  29
  30 #include "wx/app.h"
  31 #include "wx/mgl/private.h"
  32
  33 //-----------------------------------------------------------------------------
  34 // Global data
  35 //-----------------------------------------------------------------------------
  36
  37 wxApp *wxTheApp = NULL;
  38 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
  39
  40 static wxEventLoop *gs_mainEventLoop = NULL;
  41
  42
  43 //-----------------------------------------------------------------------------
  44 // wxExit
  45 //-----------------------------------------------------------------------------
  46
  47 void wxExit()
  48 {
  49     MGL_exit();
  50     exit(0);
  51 }
  52
  53 //-----------------------------------------------------------------------------
  54 // wxYield
  55 //-----------------------------------------------------------------------------
  56
  57 static bool gs_inYield = FALSE;
  58
  59 bool wxYield()
  60 {
  61 #if wxUSE_THREADS
  62     if ( !wxThread::IsMain() )
  63     {
  64         // can't process events from other threads, MGL is thread-unsafe
  65         return TRUE;
  66     }
  67 #endif // wxUSE_THREADS
  68
  69     gs_inYield = TRUE;
  70
  71     wxLog::Suspend();
  72
  73     while (gs_mainEventLoop->Pending())
  74         gs_mainEventLoop->Dispatch();
  75
  76     /* it's necessary to call ProcessIdle() to update the frames sizes which
  77        might have been changed (it also will update other things set from
  78        OnUpdateUI() which is a nice (and desired) side effect) */
  79     while (wxTheApp->ProcessIdle()) { }
  80
  81     wxLog::Resume();
  82
  83     gs_inYield = FALSE;
  84
  85     return TRUE;
  86 }
  87
  88 bool wxYieldIfNeeded()
  89 {
  90     if (gs_inYield)
  91         return FALSE;
  92
  93     return wxYield();
  94 }
  95
  96
  97 //-----------------------------------------------------------------------------
  98 // wxWakeUpIdle
  99 //-----------------------------------------------------------------------------
 100
 101 void wxWakeUpIdle()
 102 {
 103 #if wxUSE_THREADS
 104     if (!wxThread::IsMain())
 105         wxMutexGuiEnter();
 106 #endif
 107
 108     while (wxTheApp->ProcessIdle()) {}
 109
 110 #if wxUSE_THREADS
 111     if (!wxThread::IsMain())
 112         wxMutexGuiLeave();
 113 #endif
 114 }
 115
 116 //-----------------------------------------------------------------------------
 117 // wxApp
 118 //-----------------------------------------------------------------------------
 119
 120 IMPLEMENT_DYNAMIC_CLASS(wxApp,wxEvtHandler)
 121
 122 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
 123     EVT_IDLE(wxApp::OnIdle)
 124 END_EVENT_TABLE()
 125
 126
 127 wxApp::wxApp()
 128 {
 129 }
 130
 131 wxApp::~wxApp()
 132 {
 133 }
 134
 135 bool wxApp::OnInitGui()
 136 {
 137     if ( MGL_init(".", NULL) == 0 )
 138         return FALSE;
 139     if ( !wxCreateMGL_WM() )
 140         return FALSE;
 141
 142     // This has to be done *after* wxCreateMGL_WM() because it initializes
 143     // wxUniv's themes
 144     if ( !wxAppBase::OnInitGui() )
 145         return FALSE;
 146
 147     return TRUE;
 148 }
 149
 150 bool wxApp::ProcessIdle()
 151 {
 152     wxIdleEvent event;
 153     event.SetEventObject(this);
 154     ProcessEvent(event);
 155
 156     return event.MoreRequested();
 157 }
 158
 159 void wxApp::OnIdle(wxIdleEvent &event)
 160 {
 161     static bool s_inOnIdle = FALSE;
 162
 163     /* Avoid recursion (via ProcessEvent default case) */
 164     if (s_inOnIdle)
 165         return;
 166
 167     s_inOnIdle = TRUE;
 168
 169     /* Resend in the main thread events which have been prepared in other
 170        threads */
 171     ProcessPendingEvents();
 172
 173     // 'Garbage' collection of windows deleted with Close().
 174     DeletePendingObjects();
 175
 176     // Send OnIdle events to all windows
 177     if ( SendIdleEvents() )
 178         event.RequestMore(TRUE);
 179
 180     s_inOnIdle = FALSE;
 181 }
 182
 183 bool wxApp::SendIdleEvents()
 184 {
 185     bool needMore = FALSE;
 186
 187     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 188     while (node)
 189     {
 190         wxWindow* win = node->GetData();
 191         if ( SendIdleEvents(win) )
 192             needMore = TRUE;
 193         node = node->GetNext();
 194     }
 195
 196     return needMore;
 197 }
 198
 199 bool wxApp::SendIdleEvents(wxWindow* win)
 200 {
 201     bool needMore = FALSE;
 202
 203     wxIdleEvent event;
 204     event.SetEventObject(win);
 205
 206     win->GetEventHandler()->ProcessEvent(event);
 207
 208 #if 0 // FIXME_MGL - what the hell it is?
 209     win->OnInternalIdle();
 210
 211     if ( event.MoreRequested() )
 212         needMore = TRUE;
 213 #endif
 214
 215     wxNode* node = win->GetChildren().First();
 216     while (node)
 217     {
 218         wxWindow* win = (wxWindow*) node->Data();
 219         if ( SendIdleEvents(win) )
 220             needMore = TRUE;
 221
 222         node = node->Next();
 223     }
 224     return needMore;
 225 }
 226
 227 int wxApp::MainLoop()
 228 {
 229     gs_mainEventLoop = new wxEventLoop;
 230     return gs_mainEventLoop->Run();
 231     delete gs_mainEventLoop;
 232     gs_mainEventLoop = NULL;
 233 }
 234
 235 void wxApp::ExitMainLoop()
 236 {
 237     gs_mainEventLoop->Exit(0);
 238 }
 239
 240 bool wxApp::Initialized()
 241 {
 242     return (GetTopWindow() != NULL);
 243 }
 244
 245 bool wxApp::Pending()
 246 {
 247     return gs_mainEventLoop->Pending();
 248 }
 249
 250 void wxApp::Dispatch()
 251 {
 252     gs_mainEventLoop->Dispatch();
 253 }
 254
 255 void wxApp::DeletePendingObjects()
 256 {
 257     wxNode *node = wxPendingDelete.First();
 258     while (node)
 259     {
 260         wxObject *obj = (wxObject *)node->Data();
 261
 262         delete obj;
 263
 264         if ( wxPendingDelete.Find(obj) )
 265             delete node;
 266
 267         node = wxPendingDelete.First();
 268     }
 269 }
 270
 271 bool wxApp::Initialize()
 272 {
 273     wxBuffer = new wxChar[BUFSIZ + 512];
 274
 275     wxClassInfo::InitializeClasses();
 276
 277     wxSystemSettings::Init();
 278
 279 #if wxUSE_INTL
 280     wxFont::SetDefaultEncoding(wxLocale::GetSystemEncoding());
 281 #endif
 282
 283     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 284     // create a module for that as it's part of the core.
 285 #if wxUSE_THREADS
 286     wxPendingEvents = new wxList;
 287     wxPendingEventsLocker = new wxCriticalSection;
 288 #endif
 289
 290     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
 291     wxTheColourDatabase->Initialize();
 292
 293     wxInitializeStockLists();
 294     wxInitializeStockObjects();
 295
 296 #if wxUSE_WX_RESOURCES
 297     wxInitializeResourceSystem();
 298 #endif
 299
 300     wxModule::RegisterModules();
 301     if (!wxModule::InitializeModules()) return FALSE;
 302
 303     return TRUE;
 304 }
 305
 306 #include "info.xpm"
 307 #include "error.xpm"
 308 #include "question.xpm"
 309 #include "warning.xpm"
 310
 311 wxIcon wxApp::GetStdIcon(int which) const
 312 {
 313     switch(which)
 314     {
 315         case wxICON_INFORMATION:
 316             return wxIcon(info_xpm);
 317         case wxICON_QUESTION:
 318             return wxIcon(question_xpm);
 319         case wxICON_EXCLAMATION:
 320             return wxIcon(warning_xpm);
 321         default:
 322             wxFAIL_MSG(wxT("requested non existent standard icon"));
 323             // still fall through
 324         case wxICON_HAND:
 325             return wxIcon(error_xpm);
 326     }
 327 }
 328
 329 void wxApp::CleanUp()
 330 {
 331 #if wxUSE_LOG
 332     // flush the logged messages if any
 333     wxLog *log = wxLog::GetActiveTarget();
 334     if (log != NULL && log->HasPendingMessages())
 335         log->Flush();
 336
 337     // continuing to use user defined log target is unsafe from now on because
 338     // some resources may be already unavailable, so replace it by something
 339     // more safe
 340     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 341     if ( oldlog )
 342         delete oldlog;
 343 #endif // wxUSE_LOG
 344
 345     wxModule::CleanUpModules();
 346
 347 #if wxUSE_WX_RESOURCES
 348     wxCleanUpResourceSystem();
 349 #endif
 350
 351     if (wxTheColourDatabase)
 352         delete wxTheColourDatabase;
 353
 354     wxTheColourDatabase = (wxColourDatabase*) NULL;
 355
 356     wxDeleteStockObjects();
 357
 358     wxDeleteStockLists();
 359
 360     delete wxTheApp;
 361     wxTheApp = (wxApp*) NULL;
 362
 363     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 364     // create a module for that as it's part of the core.
 365 #if wxUSE_THREADS
 366     delete wxPendingEvents;
 367     delete wxPendingEventsLocker;
 368 #endif
 369
 370     wxSystemSettings::Done();
 371
 372     delete[] wxBuffer;
 373
 374     wxClassInfo::CleanUpClasses();
 375
 376     // check for memory leaks
 377 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 378     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 379     {
 380         wxLogDebug(wxT("There were memory leaks.\n"));
 381         wxDebugContext::Dump();
 382         wxDebugContext::PrintStatistics();
 383     }
 384 #endif // Debug
 385
 386 #if wxUSE_LOG
 387     // do this as the very last thing because everything else can log messages
 388     wxLog::DontCreateOnDemand();
 389
 390     wxLog *oldLog = wxLog::SetActiveTarget( (wxLog*) NULL );
 391     if (oldLog)
 392         delete oldLog;
 393 #endif // wxUSE_LOG
 394
 395     wxDestroyMGL_WM();
 396     MGL_exit();
 397 }
 398
 399
 400 int wxEntryStart(int argc, char *argv[])
 401 {
 402     return wxApp::Initialize() ? 0 : -1;
 403 }
 404
 405
 406 int wxEntryInitGui()
 407 {
 408     return wxTheApp->OnInitGui() ? 0 : -1;
 409 }
 410
 411
 412 void wxEntryCleanup()
 413 {
 414     wxApp::CleanUp();
 415 }
 416
 417
 418
 419 int wxEntry(int argc, char *argv[])
 420 {
 421 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 422     // This seems to be necessary since there are 'rogue'
 423     // objects present at this point (perhaps global objects?)
 424     // Setting a checkpoint will ignore them as far as the
 425     // memory checking facility is concerned.
 426     // Of course you may argue that memory allocated in globals should be
 427     // checked, but this is a reasonable compromise.
 428     wxDebugContext::SetCheckpoint();
 429 #endif
 430     int err = wxEntryStart(argc, argv);
 431     if ( err )
 432         return err;
 433
 434     if ( !wxTheApp )
 435     {
 436         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 437                      wxT("wxWindows error: No initializer - use IMPLEMENT_APP macro.\n") );
 438
 439         wxAppInitializerFunction app_ini = wxApp::GetInitializerFunction();
 440
 441         wxObject *test_app = app_ini();
 442
 443         wxTheApp = (wxApp*) test_app;
 444     }
 445
 446     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 447
 448     wxTheApp->argc = argc;
 449 #if wxUSE_UNICODE
 450     wxTheApp->argv = new wxChar*[argc+1];
 451     int mb_argc = 0;
 452     while (mb_argc < argc)
 453     {
 454         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 455         mb_argc++;
 456     }
 457     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 458 #else
 459     wxTheApp->argv = argv;
 460 #endif
 461
 462     wxString name(wxFileNameFromPath(argv[0]));
 463     wxStripExtension(name);
 464     wxTheApp->SetAppName(name);
 465
 466     int retValue;
 467     retValue = wxEntryInitGui();
 468
 469     // Here frames insert themselves automatically into wxTopLevelWindows by
 470     // getting created in OnInit().
 471     if ( retValue == 0 )
 472     {
 473         if ( !wxTheApp->OnInit() )
 474             retValue = -1;
 475     }
 476
 477     if ( retValue == 0 )
 478     {
 479         /* delete pending toplevel windows (typically a single
 480            dialog) so that, if there isn't any left, we don't
 481            call OnRun() */
 482         wxTheApp->DeletePendingObjects();
 483
 484         if ( wxTheApp->Initialized() &&
 485              wxTopLevelWindows.GetCount() != 0 )
 486         {
 487             wxTheApp->OnRun();
 488
 489             wxWindow *topWindow = wxTheApp->GetTopWindow();
 490             if ( topWindow )
 491             {
 492                 /* Forcibly delete the window. */
 493                 if (topWindow->IsKindOf(CLASSINFO(wxFrame)) ||
 494                     topWindow->IsKindOf(CLASSINFO(wxDialog)) )
 495                 {
 496                     topWindow->Close(TRUE);
 497                     wxTheApp->DeletePendingObjects();
 498                 }
 499                 else
 500                 {
 501                     delete topWindow;
 502                     wxTheApp->SetTopWindow((wxWindow*) NULL);
 503                 }
 504             }
 505
 506             retValue = wxTheApp->OnExit();
 507         }
 508     }
 509
 510     wxEntryCleanup();
 511
 512     return retValue;
 513 }