src/motif/app.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        app.cpp
   3 // Purpose:     wxApp
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13     #pragma implementation "app.h"
  14 #endif
  15
  16 #ifdef __VMS
  17 #define XtParent XTPARENT
  18 #define XtDisplay XTDISPLAY
  19 #endif
  20
  21 #include "wx/app.h"
  22 #include "wx/utils.h"
  23 #include "wx/module.h"
  24 #include "wx/memory.h"
  25 #include "wx/log.h"
  26 #include "wx/intl.h"
  27 #include "wx/evtloop.h"
  28 #include "wx/hash.h"
  29 #include "wx/hashmap.h"
  30
  31 #if wxUSE_THREADS
  32     #include "wx/thread.h"
  33 #endif
  34
  35 #ifdef __VMS__
  36 #pragma message disable nosimpint
  37 #endif
  38 #include <Xm/Xm.h>
  39 #include <X11/Xlib.h>
  40 #include <X11/Xutil.h>
  41 #include <X11/Xresource.h>
  42 #include <X11/Xatom.h>
  43 #ifdef __VMS__
  44 #pragma message enable nosimpint
  45 #endif
  46
  47 #include "wx/motif/private.h"
  48
  49 #include <string.h>
  50
  51 WX_DECLARE_VOIDPTR_HASH_MAP( wxXVisualInfo*, wxXVisualInfoMap );
  52
  53 extern wxList wxPendingDelete;
  54 extern bool wxAddIdleCallback();
  55
  56 wxApp *wxTheApp = NULL;
  57
  58 wxHashTable *wxWidgetHashTable = NULL;
  59
  60 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  61
  62 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  63     EVT_IDLE(wxApp::OnIdle)
  64 END_EVENT_TABLE()
  65
  66 #ifdef __WXDEBUG__
  67     typedef int (*XErrorHandlerFunc)(Display *, XErrorEvent *);
  68
  69     XErrorHandlerFunc gs_pfnXErrorHandler = 0;
  70
  71     static int wxXErrorHandler(Display *dpy, XErrorEvent *xevent)
  72     {
  73         // just forward to the default handler for now
  74         return gs_pfnXErrorHandler(dpy, xevent);
  75     }
  76 #endif // __WXDEBUG__
  77
  78 long wxApp::sm_lastMessageTime = 0;
  79
  80 bool wxApp::Initialize()
  81 {
  82     wxClassInfo::InitializeClasses();
  83
  84     // GL: I'm annoyed ... I don't know where to put this and I don't want to
  85     // create a module for that as it's part of the core.
  86 #if wxUSE_THREADS
  87     wxPendingEventsLocker = new wxCriticalSection();
  88 #endif
  89
  90     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  91     wxTheColourDatabase->Initialize();
  92
  93     wxInitializeStockLists();
  94     wxInitializeStockObjects();
  95
  96     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
  97
  98     wxModule::RegisterModules();
  99     if (!wxModule::InitializeModules()) return FALSE;
 100
 101     return TRUE;
 102 }
 103
 104 void wxApp::CleanUp()
 105 {
 106     wxModule::CleanUpModules();
 107
 108     wxDeleteStockObjects() ;
 109
 110     // Destroy all GDI lists, etc.
 111
 112     wxDeleteStockLists();
 113
 114     delete wxTheColourDatabase;
 115     wxTheColourDatabase = NULL;
 116
 117     wxClassInfo::CleanUpClasses();
 118
 119     delete wxTheApp;
 120     wxTheApp = NULL;
 121
 122     delete wxWidgetHashTable;
 123     wxWidgetHashTable = NULL;
 124
 125     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 126     // create a module for that as it's part of the core.
 127 #if wxUSE_THREADS
 128     delete wxPendingEvents;
 129     delete wxPendingEventsLocker;
 130 #endif
 131
 132 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 133     // At this point we want to check if there are any memory
 134     // blocks that aren't part of the wxDebugContext itself,
 135     // as a special case. Then when dumping we need to ignore
 136     // wxDebugContext, too.
 137     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 138     {
 139         wxLogDebug("There were memory leaks.\n");
 140         wxDebugContext::Dump();
 141         wxDebugContext::PrintStatistics();
 142     }
 143 #endif
 144
 145     // do it as the very last thing because everything else can log messages
 146     wxLog::DontCreateOnDemand();
 147     // do it as the very last thing because everything else can log messages
 148     delete wxLog::SetActiveTarget(NULL);
 149 }
 150
 151 // ============================================================================
 152 // wxEntry*
 153 // ============================================================================
 154
 155 int wxEntryStart( int argc, char* argv[] )
 156 {
 157 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 158     // This seems to be necessary since there are 'rogue'
 159     // objects present at this point (perhaps global objects?)
 160     // Setting a checkpoint will ignore them as far as the
 161     // memory checking facility is concerned.
 162     // Of course you may argue that memory allocated in globals should be
 163     // checked, but this is a reasonable compromise.
 164     wxDebugContext::SetCheckpoint();
 165 #endif
 166
 167     if (!wxApp::Initialize())
 168         return -1;
 169
 170     return 0;
 171 }
 172
 173 int wxEntryInitGui()
 174 {
 175     int retValue = 0;
 176
 177     // GUI-specific initialization, such as creating an app context.
 178     if (!wxTheApp->OnInitGui())
 179         retValue = -1;
 180
 181     return retValue;
 182 }
 183
 184 void wxEntryCleanup()
 185 {
 186     // So dialog boxes aren't used for further messages
 187     delete wxLog::SetActiveTarget(new wxLogStderr);
 188
 189     // flush the logged messages if any
 190     wxLog *pLog = wxLog::GetActiveTarget();
 191     if ( pLog != NULL && pLog->HasPendingMessages() )
 192         pLog->Flush();
 193
 194     wxApp::CleanUp();
 195 }
 196
 197 int wxEntry( int argc, char *argv[] )
 198 {
 199     int retValue = 0;
 200
 201     retValue = wxEntryStart( argc, argv );
 202     if (retValue) return retValue;
 203
 204     if (!wxTheApp)
 205     {
 206         if (!wxApp::GetInitializerFunction())
 207         {
 208             printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 209             return 0;
 210         };
 211
 212         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 213     };
 214
 215     if (!wxTheApp)
 216     {
 217         printf( "wxWindows error: wxTheApp == NULL\n" );
 218         return 0;
 219     };
 220
 221     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 222     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 223
 224     wxTheApp->argc = argc;
 225     wxTheApp->argv = argv;
 226
 227     // GUI-specific initialization, such as creating an app context.
 228     retValue = wxEntryInitGui();
 229     if (retValue) return retValue;
 230
 231     // Here frames insert themselves automatically into wxTopLevelWindows by
 232     // getting created in OnInit().
 233
 234     if (wxTheApp->OnInit())
 235     {
 236         if (wxTheApp->Initialized())
 237             wxTheApp->OnRun();
 238     }
 239
 240     if (wxTheApp->GetTopWindow())
 241     {
 242         delete wxTheApp->GetTopWindow();
 243         wxTheApp->SetTopWindow(NULL);
 244     }
 245
 246     wxTheApp->DeletePendingObjects();
 247
 248     retValue = wxTheApp->OnExit();
 249
 250     wxEntryCleanup();
 251
 252     return retValue;
 253 }
 254
 255 // Static member initialization
 256 wxAppInitializerFunction wxAppBase::m_appInitFn = (wxAppInitializerFunction) NULL;
 257
 258 wxApp::wxApp()
 259 {
 260     argc = 0;
 261     argv = NULL;
 262
 263     m_eventLoop = new wxEventLoop;
 264     m_mainColormap = (WXColormap) NULL;
 265     m_appContext = (WXAppContext) NULL;
 266     m_topLevelWidget = (WXWidget) NULL;
 267     m_maxRequestSize = 0;
 268     m_initialDisplay = (WXDisplay*) 0;
 269     m_visualInfoMap = new wxXVisualInfoMap;
 270 }
 271
 272 wxApp::~wxApp()
 273 {
 274     delete m_eventLoop;
 275
 276     for( wxXVisualInfoMap::iterator it  = m_visualInfoMap->begin(),
 277                                     end = m_visualInfoMap->end();
 278          it != end; ++it )
 279     {
 280         delete it->second;
 281     }
 282
 283     delete m_visualInfoMap;
 284 }
 285
 286 bool wxApp::Initialized()
 287 {
 288     if (GetTopWindow())
 289         return TRUE;
 290     else
 291         return FALSE;
 292 }
 293
 294 int wxApp::MainLoop()
 295 {
 296     /*
 297     * Sit around forever waiting to process X-events. Property Change
 298     * event are handled special, because they have to refer to
 299     * the root window rather than to a widget. therefore we can't
 300     * use an Xt-eventhandler.
 301     */
 302
 303     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 304         XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 305         PropertyChangeMask);
 306
 307     m_eventLoop->Run();
 308
 309     return 0;
 310 }
 311
 312 // Processes an idle event.
 313 // Returns TRUE if more time is needed.
 314 bool wxApp::ProcessIdle()
 315 {
 316     wxIdleEvent event;
 317
 318     return ProcessEvent(event) && event.MoreRequested();
 319 }
 320
 321 void wxApp::ExitMainLoop()
 322 {
 323     if( m_eventLoop->IsRunning() )
 324         m_eventLoop->Exit();
 325 }
 326
 327 // Is a message/event pending?
 328 bool wxApp::Pending()
 329 {
 330     return m_eventLoop->Pending();
 331 #if 0
 332     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 333
 334     // Fix by Doug from STI, to prevent a stall if non-X event
 335     // is found.
 336     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 337 #endif
 338 }
 339
 340 // Dispatch a message.
 341 void wxApp::Dispatch()
 342 {
 343     m_eventLoop->Dispatch();
 344 }
 345
 346 // This should be redefined in a derived class for
 347 // handling property change events for XAtom IPC.
 348 void wxApp::HandlePropertyChange(WXEvent *event)
 349 {
 350     // by default do nothing special
 351     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 352 }
 353
 354 void wxApp::OnIdle(wxIdleEvent& event)
 355 {
 356     static bool inOnIdle = FALSE;
 357
 358     // Avoid recursion (via ProcessEvent default case)
 359     if (inOnIdle)
 360         return;
 361
 362     inOnIdle = TRUE;
 363
 364     // If there are pending events, we must process them: pending events
 365     // are either events to the threads other than main or events posted
 366     // with wxPostEvent() functions
 367     // GRG: I have moved this here so that all pending events are processed
 368     //   before starting to delete any objects. This behaves better (in
 369     //   particular, wrt wxPostEvent) and is coherent with wxGTK's current
 370     //   behaviour. Also removed the '#if wxUSE_THREADS' around it.
 371     //  Changed Mar/2000 before 2.1.14
 372
 373     // Flush pending events.
 374     ProcessPendingEvents();
 375
 376     // 'Garbage' collection of windows deleted with Close().
 377     DeletePendingObjects();
 378
 379     // flush the logged messages if any
 380     wxLog *pLog = wxLog::GetActiveTarget();
 381     if ( pLog != NULL && pLog->HasPendingMessages() )
 382         pLog->Flush();
 383
 384     // Send OnIdle events to all windows
 385     bool needMore = SendIdleEvents();
 386
 387     if (needMore)
 388         event.RequestMore(TRUE);
 389
 390     inOnIdle = FALSE;
 391 }
 392
 393 // Send idle event to all top-level windows
 394 bool wxApp::SendIdleEvents()
 395 {
 396     bool needMore = FALSE;
 397
 398     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 399     while (node)
 400     {
 401         wxWindow* win = node->GetData();
 402         if (SendIdleEvents(win))
 403             needMore = TRUE;
 404         node = node->GetNext();
 405     }
 406
 407     return needMore;
 408 }
 409
 410 // Send idle event to window and all subwindows
 411 bool wxApp::SendIdleEvents(wxWindow* win)
 412 {
 413     bool needMore = FALSE;
 414
 415     wxIdleEvent event;
 416     event.SetEventObject(win);
 417     win->GetEventHandler()->ProcessEvent(event);
 418
 419     if (event.MoreRequested())
 420         needMore = TRUE;
 421
 422     wxWindowList::Node* node = win->GetChildren().GetFirst();
 423     while (node)
 424     {
 425         wxWindow* win = node->GetData();
 426         if (SendIdleEvents(win))
 427             needMore = TRUE;
 428
 429         node = node->GetNext();
 430     }
 431     return needMore ;
 432 }
 433
 434 void wxApp::DeletePendingObjects()
 435 {
 436     wxList::Node *node = wxPendingDelete.GetFirst();
 437     while (node)
 438     {
 439         wxObject *obj = node->GetData();
 440
 441         delete obj;
 442
 443         if (wxPendingDelete.Member(obj))
 444             delete node;
 445
 446         // Deleting one object may have deleted other pending
 447         // objects, so start from beginning of list again.
 448         node = wxPendingDelete.GetFirst();
 449     }
 450 }
 451
 452 static char *fallbackResources[] = {
 453     "*menuBar.marginHeight: 0",
 454     "*menuBar.shadowThickness: 1",
 455     "*background: #c0c0c0",
 456     "*foreground: black",
 457     NULL
 458 };
 459
 460 // Create an application context
 461 bool wxApp::OnInitGui()
 462 {
 463     if( !wxAppBase::OnInitGui() )
 464         return FALSE;
 465
 466     XtToolkitInitialize() ;
 467     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext();
 468     XtAppSetFallbackResources((XtAppContext) wxTheApp->m_appContext, fallbackResources);
 469
 470     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 471         wxTheApp->GetClassName().c_str(), NULL, 0,
 472 # if XtSpecificationRelease < 5
 473         (Cardinal*) &argc,
 474 # else
 475         &argc,
 476 # endif
 477         argv);
 478
 479     if (!dpy) {
 480          // if you don't log to stderr, nothing will be shown...
 481         delete wxLog::SetActiveTarget(new wxLogStderr);
 482         wxString className(wxTheApp->GetClassName());
 483         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 484                    className.c_str());
 485         exit(-1);
 486     }
 487     m_initialDisplay = (WXDisplay*) dpy;
 488
 489 #ifdef __WXDEBUG__
 490     // install the X error handler
 491     gs_pfnXErrorHandler = XSetErrorHandler(wxXErrorHandler);
 492 #endif // __WXDEBUG__
 493
 494     wxTheApp->m_topLevelWidget =
 495         (WXWidget) XtAppCreateShell((String)NULL,
 496                                     wxTheApp->GetClassName().c_str(),
 497                                     applicationShellWidgetClass,dpy,
 498                                     NULL,0) ;
 499
 500     // Add general resize proc
 501     XtActionsRec rec;
 502     rec.string = "resize";
 503     rec.proc = (XtActionProc)wxWidgetResizeProc;
 504     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 505
 506     GetMainColormap(dpy);
 507     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 508
 509     wxAddIdleCallback();
 510
 511     return TRUE;
 512 }
 513
 514 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 515 {
 516     if (!display) /* Must be called first with non-NULL display */
 517         return m_mainColormap;
 518
 519     int defaultScreen = DefaultScreen((Display*) display);
 520     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 521
 522     Colormap c = DefaultColormapOfScreen(screen);
 523
 524     if (!m_mainColormap)
 525         m_mainColormap = (WXColormap) c;
 526
 527     return (WXColormap) c;
 528 }
 529
 530 wxXVisualInfo* wxApp::GetVisualInfo( WXDisplay* display )
 531 {
 532     wxXVisualInfoMap::iterator it = m_visualInfoMap->find( display );
 533
 534     if( it != m_visualInfoMap->end() ) return it->second;
 535
 536     wxXVisualInfo* vi = new wxXVisualInfo;
 537     wxFillXVisualInfo( vi, (Display*)display );
 538
 539     (*m_visualInfoMap)[display] = vi;
 540
 541     return vi;
 542 }
 543
 544 void wxExit()
 545 {
 546     int retValue = 0;
 547     if (wxTheApp)
 548         retValue = wxTheApp->OnExit();
 549
 550     wxApp::CleanUp();
 551     /*
 552     * Exit in some platform-specific way.
 553     * Not recommended that the app calls this:
 554     * only for emergencies.
 555     */
 556     exit(retValue);
 557 }
 558
 559 // Yield to other processes
 560
 561 bool wxApp::Yield(bool onlyIfNeeded)
 562 {
 563     bool s_inYield = FALSE;
 564
 565     if ( s_inYield )
 566     {
 567         if ( !onlyIfNeeded )
 568         {
 569             wxFAIL_MSG( wxT("wxYield called recursively" ) );
 570         }
 571
 572         return FALSE;
 573     }
 574
 575     s_inYield = TRUE;
 576
 577     while (wxTheApp && wxTheApp->Pending())
 578         wxTheApp->Dispatch();
 579
 580     s_inYield = FALSE;
 581
 582     return TRUE;
 583 }
 584
 585 // ----------------------------------------------------------------------------
 586 // accessors for C modules
 587 // ----------------------------------------------------------------------------
 588
 589 extern "C" XtAppContext wxGetAppContext()
 590 {
 591     return (XtAppContext)wxTheApp->GetAppContext();
 592 }