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 #include "wx/frame.h"
  17 #include "wx/app.h"
  18 #include "wx/utils.h"
  19 #include "wx/gdicmn.h"
  20 #include "wx/pen.h"
  21 #include "wx/brush.h"
  22 #include "wx/cursor.h"
  23 #include "wx/icon.h"
  24 #include "wx/palette.h"
  25 #include "wx/dc.h"
  26 #include "wx/dialog.h"
  27 #include "wx/msgdlg.h"
  28 #include "wx/log.h"
  29 #include "wx/module.h"
  30 #include "wx/memory.h"
  31
  32 #if wxUSE_WX_RESOURCES
  33 #include "wx/resource.h"
  34 #endif
  35
  36 #include <Xm/Xm.h>
  37 #include <X11/Xlib.h>
  38 #include <X11/Xutil.h>
  39 #include <X11/Xresource.h>
  40 #include <X11/Xatom.h>
  41
  42 #include "wx/motif/private.h"
  43
  44 #include <string.h>
  45
  46 extern char *wxBuffer;
  47 extern wxList wxPendingDelete;
  48
  49 wxApp *wxTheApp = NULL;
  50
  51 wxHashTable *wxWidgetHashTable = NULL;
  52
  53 #if !USE_SHARED_LIBRARY
  54 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  55 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  56     EVT_IDLE(wxApp::OnIdle)
  57 END_EVENT_TABLE()
  58 #endif
  59
  60 long wxApp::sm_lastMessageTime = 0;
  61
  62 bool wxApp::Initialize()
  63 {
  64 #ifdef __WXMSW__
  65     wxBuffer = new char[1500];
  66 #else
  67     wxBuffer = new char[BUFSIZ + 512];
  68 #endif
  69
  70     wxClassInfo::InitializeClasses();
  71
  72     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  73     wxTheColourDatabase->Initialize();
  74
  75     wxInitializeStockLists();
  76     wxInitializeStockObjects();
  77
  78 #if wxUSE_WX_RESOURCES
  79     wxInitializeResourceSystem();
  80 #endif
  81
  82   // For PostScript printing
  83 #if wxUSE_POSTSCRIPT
  84 /* Done using wxModule now
  85     wxInitializePrintSetupData();
  86     wxThePrintPaperDatabase = new wxPrintPaperDatabase;
  87     wxThePrintPaperDatabase->CreateDatabase();
  88 */
  89 #endif
  90
  91     wxBitmap::InitStandardHandlers();
  92
  93     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
  94
  95     wxModule::RegisterModules();
  96     wxASSERT( wxModule::InitializeModules() == TRUE );
  97
  98     return TRUE;
  99 }
 100
 101 void wxApp::CleanUp()
 102 {
 103     delete wxWidgetHashTable;
 104     wxWidgetHashTable = NULL;
 105
 106     wxModule::CleanUpModules();
 107
 108 #if wxUSE_WX_RESOURCES
 109     wxCleanUpResourceSystem();
 110 #endif
 111
 112     wxDeleteStockObjects() ;
 113
 114     // Destroy all GDI lists, etc.
 115
 116     delete wxTheBrushList;
 117     wxTheBrushList = NULL;
 118
 119     delete wxThePenList;
 120     wxThePenList = NULL;
 121
 122     delete wxTheFontList;
 123     wxTheFontList = NULL;
 124
 125     delete wxTheBitmapList;
 126     wxTheBitmapList = NULL;
 127
 128     delete wxTheColourDatabase;
 129     wxTheColourDatabase = NULL;
 130
 131 #if wxUSE_POSTSCRIPT
 132 /* Done using wxModule now
 133     wxInitializePrintSetupData(FALSE);
 134     delete wxThePrintPaperDatabase;
 135     wxThePrintPaperDatabase = NULL;
 136 */
 137 #endif
 138
 139     wxBitmap::CleanUpHandlers();
 140
 141     delete[] wxBuffer;
 142     wxBuffer = NULL;
 143
 144     wxClassInfo::CleanUpClasses();
 145
 146     delete wxTheApp;
 147     wxTheApp = NULL;
 148
 149 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 150     // At this point we want to check if there are any memory
 151     // blocks that aren't part of the wxDebugContext itself,
 152     // as a special case. Then when dumping we need to ignore
 153     // wxDebugContext, too.
 154     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 155     {
 156       wxLogDebug("There were memory leaks.\n");
 157       wxDebugContext::Dump();
 158       wxDebugContext::PrintStatistics();
 159     }
 160 #endif
 161
 162     // do it as the very last thing because everything else can log messages
 163     wxLog::DontCreateOnDemand();
 164     // do it as the very last thing because everything else can log messages
 165     delete wxLog::SetActiveTarget(NULL);
 166 }
 167
 168 int wxEntry( int argc, char *argv[] )
 169 {
 170 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 171     // This seems to be necessary since there are 'rogue'
 172     // objects present at this point (perhaps global objects?)
 173     // Setting a checkpoint will ignore them as far as the
 174     // memory checking facility is concerned.
 175     // Of course you may argue that memory allocated in globals should be
 176     // checked, but this is a reasonable compromise.
 177     wxDebugContext::SetCheckpoint();
 178 #endif
 179
 180     if (!wxApp::Initialize())
 181       return FALSE;
 182
 183     if (!wxTheApp)
 184     {
 185       if (!wxApp::GetInitializerFunction())
 186       {
 187         printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 188         return 0;
 189       };
 190
 191         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 192     };
 193
 194     if (!wxTheApp)
 195     {
 196       printf( "wxWindows error: wxTheApp == NULL\n" );
 197       return 0;
 198     };
 199
 200     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 201     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 202
 203     wxTheApp->argc = argc;
 204     wxTheApp->argv = argv;
 205
 206     // GUI-specific initialization, such as creating an app context.
 207     wxTheApp->OnInitGui();
 208
 209     // Here frames insert themselves automatically
 210     // into wxTopLevelWindows by getting created
 211     // in OnInit().
 212
 213     int retValue = 0;
 214     if (wxTheApp->OnInit())
 215     {
 216       if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 217     }
 218
 219     // flush the logged messages if any
 220     wxLog *pLog = wxLog::GetActiveTarget();
 221     if ( pLog != NULL && pLog->HasPendingMessages() )
 222       pLog->Flush();
 223
 224     delete wxLog::SetActiveTarget(new wxLogStderr); // So dialog boxes aren't used
 225                                    // for further messages
 226
 227     if (wxTheApp->GetTopWindow())
 228     {
 229       delete wxTheApp->GetTopWindow();
 230       wxTheApp->SetTopWindow(NULL);
 231     }
 232
 233     wxTheApp->DeletePendingObjects();
 234
 235     wxTheApp->OnExit();
 236
 237     wxApp::CleanUp();
 238
 239     return retValue;
 240 };
 241
 242 // Static member initialization
 243 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 244
 245 wxApp::wxApp()
 246 {
 247     m_topWindow = NULL;
 248     wxTheApp = this;
 249     m_className = "";
 250     m_wantDebugOutput = TRUE ;
 251     m_appName = "";
 252     argc = 0;
 253     argv = NULL;
 254     m_printMode = wxPRINT_POSTSCRIPT;
 255     m_exitOnFrameDelete = TRUE;
 256     m_auto3D = TRUE;
 257
 258     m_mainColormap = (WXColormap) NULL;
 259     m_appContext = (WXAppContext) NULL;
 260     m_topLevelWidget = (WXWidget) NULL;
 261     m_maxRequestSize = 0;
 262     m_initialDisplay = (WXDisplay*) 0;
 263 }
 264
 265 bool wxApp::Initialized()
 266 {
 267     if (GetTopWindow())
 268       return TRUE;
 269     else
 270       return FALSE;
 271 }
 272
 273 int wxApp::MainLoop()
 274 {
 275     m_keepGoing = TRUE;
 276
 277    /*
 278     * Sit around forever waiting to process X-events. Property Change
 279     * event are handled special, because they have to refer to
 280     * the root window rather than to a widget. therefore we can't
 281     * use an Xt-eventhandler.
 282     */
 283
 284     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 285                  XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 286                  PropertyChangeMask);
 287
 288     XEvent event;
 289
 290     // Use this flag to allow breaking the loop via wxApp::ExitMainLoop()
 291     while (m_keepGoing)
 292     {
 293       XtAppNextEvent( (XtAppContext) wxTheApp->GetAppContext(), &event);
 294
 295       ProcessXEvent((WXEvent*) & event);
 296       ProcessIdle();
 297     }
 298
 299     return 0;
 300 }
 301
 302 // Processes an X event.
 303 void wxApp::ProcessXEvent(WXEvent* _event)
 304 {
 305     XEvent* event = (XEvent*) _event;
 306
 307     if ((event->type == KeyPress) && CheckForAccelerator(_event))
 308     {
 309         // Do nothing! We intercepted and processed the event as an accelerator.
 310         return;
 311     }
 312     else if (event->type == PropertyNotify)
 313     {
 314         HandlePropertyChange(_event);
 315         return;
 316     }
 317     else if (event->type == ResizeRequest)
 318     {
 319         /* Terry Gitnick <terryg@scientech.com> - 1/21/98
 320          * If resize event, don't resize until the last resize event for this
 321          * window is recieved. Prevents flicker as windows are resized.
 322          */
 323
 324         Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 325         Window win = event->xany.window;
 326         XEvent report;
 327
 328         //  to avoid flicker
 329         report = * event;
 330         while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 331
 332         // TODO: when implementing refresh optimization, we can use
 333         // XtAddExposureToRegion to expand the window's paint region.
 334
 335         XtDispatchEvent(event);
 336     }
 337     else
 338     {
 339         XtDispatchEvent(event);
 340     }
 341 }
 342
 343 // Returns TRUE if more time is needed.
 344 bool wxApp::ProcessIdle()
 345 {
 346     wxIdleEvent event;
 347     event.SetEventObject(this);
 348     ProcessEvent(event);
 349
 350     return event.MoreRequested();
 351 }
 352
 353 void wxApp::ExitMainLoop()
 354 {
 355     m_keepGoing = FALSE;
 356 }
 357
 358 // Is a message/event pending?
 359 bool wxApp::Pending()
 360 {
 361     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 362
 363     // Fix by Doug from STI, to prevent a stall if non-X event
 364     // is found.
 365     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 366 }
 367
 368 // Dispatch a message.
 369 void wxApp::Dispatch()
 370 {
 371 //    XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 372
 373     XEvent event;
 374     XtAppNextEvent((XtAppContext) GetAppContext(), &event);
 375     ProcessXEvent((WXEvent*) & event);
 376 }
 377
 378 // This should be redefined in a derived class for
 379 // handling property change events for XAtom IPC.
 380 void wxApp::HandlePropertyChange(WXEvent *event)
 381 {
 382     // by default do nothing special
 383     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 384 }
 385
 386 void wxApp::OnIdle(wxIdleEvent& event)
 387 {
 388     static bool inOnIdle = FALSE;
 389
 390     // Avoid recursion (via ProcessEvent default case)
 391     if (inOnIdle)
 392       return;
 393
 394     inOnIdle = TRUE;
 395
 396     // 'Garbage' collection of windows deleted with Close().
 397     DeletePendingObjects();
 398
 399     // flush the logged messages if any
 400     wxLog *pLog = wxLog::GetActiveTarget();
 401     if ( pLog != NULL && pLog->HasPendingMessages() )
 402       pLog->Flush();
 403
 404     // Send OnIdle events to all windows
 405     bool needMore = SendIdleEvents();
 406
 407     if (needMore)
 408       event.RequestMore(TRUE);
 409
 410     inOnIdle = FALSE;
 411 }
 412
 413 // Send idle event to all top-level windows
 414 bool wxApp::SendIdleEvents()
 415 {
 416     bool needMore = FALSE;
 417         wxNode* node = wxTopLevelWindows.First();
 418         while (node)
 419         {
 420                 wxWindow* win = (wxWindow*) node->Data();
 421                 if (SendIdleEvents(win))
 422             needMore = TRUE;
 423
 424                 node = node->Next();
 425         }
 426     return needMore;
 427 }
 428
 429 // Send idle event to window and all subwindows
 430 bool wxApp::SendIdleEvents(wxWindow* win)
 431 {
 432     bool needMore = FALSE;
 433
 434         wxIdleEvent event;
 435         event.SetEventObject(win);
 436         win->ProcessEvent(event);
 437
 438     if (event.MoreRequested())
 439         needMore = TRUE;
 440
 441         wxNode* node = win->GetChildren().First();
 442         while (node)
 443         {
 444                 wxWindow* win = (wxWindow*) node->Data();
 445                 if (SendIdleEvents(win))
 446             needMore = TRUE;
 447
 448                 node = node->Next();
 449         }
 450     return needMore ;
 451 }
 452
 453 void wxApp::DeletePendingObjects()
 454 {
 455     wxNode *node = wxPendingDelete.First();
 456     while (node)
 457     {
 458       wxObject *obj = (wxObject *)node->Data();
 459
 460       delete obj;
 461
 462       if (wxPendingDelete.Member(obj))
 463         delete node;
 464
 465       // Deleting one object may have deleted other pending
 466       // objects, so start from beginning of list again.
 467       node = wxPendingDelete.First();
 468     }
 469 }
 470
 471 wxLog* wxApp::CreateLogTarget()
 472 {
 473     return new wxLogGui;
 474 }
 475
 476 wxWindow* wxApp::GetTopWindow() const
 477 {
 478     if (m_topWindow)
 479         return m_topWindow;
 480     else if (wxTopLevelWindows.Number() > 0)
 481         return (wxWindow*) wxTopLevelWindows.First()->Data();
 482     else
 483         return NULL;
 484 }
 485
 486 // Create an application context
 487 bool wxApp::OnInitGui()
 488 {
 489     XtToolkitInitialize() ;
 490     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext() ;
 491     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 492                             (const char*) wxTheApp->GetClassName(), NULL,
 493 # if XtSpecificationRelease < 5
 494                             0,(Cardinal*) &argc,argv) ;
 495 # else
 496                             0,&argc,argv) ;
 497 # endif
 498     if (!dpy) {
 499       cerr << "wxWindows could not open display for " << wxTheApp->GetClassName() << ": exiting.\n";
 500       exit(-1);
 501     }
 502     m_initialDisplay = (WXDisplay*) dpy;
 503
 504     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 505                                      applicationShellWidgetClass,dpy,
 506                                      NULL,0) ;
 507
 508     // Add general resize proc
 509     XtActionsRec rec;
 510     rec.string = "resize";
 511     rec.proc = (XtActionProc)wxWidgetResizeProc;
 512     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 513
 514     GetMainColormap(dpy);
 515     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 516
 517     return TRUE;
 518 }
 519
 520 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 521 {
 522     if (!display) /* Must be called first with non-NULL display */
 523       return m_mainColormap;
 524
 525     Colormap c =
 526       DefaultColormapOfScreen(XScreenOfDisplay((Display*) display,
 527                                              DefaultScreen((Display*) display)));
 528
 529     if (!m_mainColormap)
 530       m_mainColormap = (WXColormap) c;
 531
 532     return (WXColormap) c;
 533 }
 534
 535 // Returns TRUE if an accelerator has been processed
 536 bool wxApp::CheckForAccelerator(WXEvent* event)
 537 {
 538     XEvent* xEvent = (XEvent*) event;
 539     if (xEvent->xany.type == KeyPress)
 540     {
 541         // Find a wxWindow for this window
 542         // TODO: should get display for the window, not the current display
 543         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(), xEvent->xany.window);
 544         wxWindow* win = NULL;
 545
 546         // Find the first wxWindow that corresponds to this event window
 547         while (widget && !(win = wxGetWindowFromTable(widget)))
 548             widget = XtParent(widget);
 549
 550         if (!widget || !win)
 551             return FALSE;
 552
 553         wxKeyEvent keyEvent(wxEVT_CHAR);
 554         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 555
 556         // Now we have a wxKeyEvent and we have a wxWindow.
 557         // Go up the hierarchy until we find a matching accelerator,
 558         // or we get to the top.
 559         while (win)
 560         {
 561             if (win->ProcessAccelerator(keyEvent))
 562                 return TRUE;
 563             win = win->GetParent();
 564         }
 565         return FALSE;
 566     }
 567     return FALSE;
 568 }
 569
 570 void wxExit()
 571 {
 572     int retValue = 0;
 573     if (wxTheApp)
 574       retValue = wxTheApp->OnExit();
 575
 576     wxApp::CleanUp();
 577     /*
 578      * Exit in some platform-specific way. Not recommended that the app calls this:
 579      * only for emergencies.
 580      */
 581     exit(retValue);
 582 }
 583
 584 // Yield to other processes
 585 bool wxYield()
 586 {
 587     while (wxTheApp && wxTheApp->Pending())
 588       wxTheApp->Dispatch();
 589     return TRUE;
 590 }
 591