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