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