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 #include "wx/log.h"
  32 #include "wx/intl.h"
  33
  34 #if wxUSE_THREADS
  35     #include "wx/thread.h"
  36 #endif
  37
  38 #if wxUSE_WX_RESOURCES
  39     #include "wx/resource.h"
  40 #endif
  41
  42 #include <Xm/Xm.h>
  43 #include <X11/Xlib.h>
  44 #include <X11/Xutil.h>
  45 #include <X11/Xresource.h>
  46 #include <X11/Xatom.h>
  47
  48 #include "wx/motif/private.h"
  49
  50 #include <string.h>
  51
  52 extern char *wxBuffer;
  53 extern wxList wxPendingDelete;
  54
  55 #if wxUSE_THREADS
  56 extern wxList *wxPendingEvents;
  57 extern wxCriticalSection *wxPendingEventsLocker;
  58 #endif // wxUSE_THREADS
  59
  60 wxApp *wxTheApp = NULL;
  61
  62 wxHashTable *wxWidgetHashTable = NULL;
  63
  64 #if !USE_SHARED_LIBRARY
  65 IMPLEMENT_DYNAMIC_CLASS(wxApp, wxEvtHandler)
  66
  67 BEGIN_EVENT_TABLE(wxApp, wxEvtHandler)
  68     EVT_IDLE(wxApp::OnIdle)
  69 END_EVENT_TABLE()
  70 #endif
  71
  72 long wxApp::sm_lastMessageTime = 0;
  73
  74 bool wxApp::Initialize()
  75 {
  76     wxBuffer = new char[BUFSIZ + 512];
  77
  78     wxClassInfo::InitializeClasses();
  79
  80     // GL: I'm annoyed ... I don't know where to put this and I don't want to
  81     // create a module for that as it's part of the core.
  82 #if wxUSE_THREADS
  83     wxPendingEvents = new wxList();
  84     wxPendingEventsLocker = new wxCriticalSection();
  85 #endif
  86
  87     wxTheColourDatabase = new wxColourDatabase(wxKEY_STRING);
  88     wxTheColourDatabase->Initialize();
  89
  90     wxInitializeStockLists();
  91     wxInitializeStockObjects();
  92
  93 #if wxUSE_WX_RESOURCES
  94     wxInitializeResourceSystem();
  95 #endif
  96
  97     // For PostScript printing
  98 #if wxUSE_POSTSCRIPT
  99     /* Done using wxModule now
 100     wxInitializePrintSetupData();
 101     wxThePrintPaperDatabase = new wxPrintPaperDatabase;
 102     wxThePrintPaperDatabase->CreateDatabase();
 103     */
 104 #endif
 105
 106     wxBitmap::InitStandardHandlers();
 107
 108     wxWidgetHashTable = new wxHashTable(wxKEY_INTEGER);
 109
 110     wxModule::RegisterModules();
 111     if (!wxModule::InitializeModules()) return FALSE;
 112
 113     return TRUE;
 114 }
 115
 116 void wxApp::CleanUp()
 117 {
 118     delete wxWidgetHashTable;
 119     wxWidgetHashTable = NULL;
 120
 121     wxModule::CleanUpModules();
 122
 123 #if wxUSE_WX_RESOURCES
 124     wxCleanUpResourceSystem();
 125 #endif
 126
 127     wxDeleteStockObjects() ;
 128
 129     // Destroy all GDI lists, etc.
 130
 131     delete wxTheBrushList;
 132     wxTheBrushList = NULL;
 133
 134     delete wxThePenList;
 135     wxThePenList = NULL;
 136
 137     delete wxTheFontList;
 138     wxTheFontList = NULL;
 139
 140     delete wxTheBitmapList;
 141     wxTheBitmapList = NULL;
 142
 143     delete wxTheColourDatabase;
 144     wxTheColourDatabase = NULL;
 145
 146 #if wxUSE_POSTSCRIPT
 147     /* Done using wxModule now
 148     wxInitializePrintSetupData(FALSE);
 149     delete wxThePrintPaperDatabase;
 150     wxThePrintPaperDatabase = NULL;
 151     */
 152 #endif
 153
 154     wxBitmap::CleanUpHandlers();
 155
 156     delete[] wxBuffer;
 157     wxBuffer = NULL;
 158
 159     wxClassInfo::CleanUpClasses();
 160
 161     delete wxTheApp;
 162     wxTheApp = NULL;
 163
 164     // GL: I'm annoyed ... I don't know where to put this and I don't want to
 165     // create a module for that as it's part of the core.
 166 #if wxUSE_THREADS
 167     delete wxPendingEvents;
 168     delete wxPendingEventsLocker;
 169 #endif
 170
 171 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 172     // At this point we want to check if there are any memory
 173     // blocks that aren't part of the wxDebugContext itself,
 174     // as a special case. Then when dumping we need to ignore
 175     // wxDebugContext, too.
 176     if (wxDebugContext::CountObjectsLeft(TRUE) > 0)
 177     {
 178         wxLogDebug("There were memory leaks.\n");
 179         wxDebugContext::Dump();
 180         wxDebugContext::PrintStatistics();
 181     }
 182 #endif
 183
 184     // do it as the very last thing because everything else can log messages
 185     wxLog::DontCreateOnDemand();
 186     // do it as the very last thing because everything else can log messages
 187     delete wxLog::SetActiveTarget(NULL);
 188 }
 189
 190 int wxEntry( int argc, char *argv[] )
 191 {
 192 #if (defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING) || wxUSE_DEBUG_CONTEXT
 193     // This seems to be necessary since there are 'rogue'
 194     // objects present at this point (perhaps global objects?)
 195     // Setting a checkpoint will ignore them as far as the
 196     // memory checking facility is concerned.
 197     // Of course you may argue that memory allocated in globals should be
 198     // checked, but this is a reasonable compromise.
 199     wxDebugContext::SetCheckpoint();
 200 #endif
 201
 202     if (!wxApp::Initialize())
 203         return FALSE;
 204
 205     if (!wxTheApp)
 206     {
 207         if (!wxApp::GetInitializerFunction())
 208         {
 209             printf( "wxWindows error: No initializer - use IMPLEMENT_APP macro.\n" );
 210             return 0;
 211         };
 212
 213         wxTheApp = (wxApp*) (* wxApp::GetInitializerFunction()) ();
 214     };
 215
 216     if (!wxTheApp)
 217     {
 218         printf( "wxWindows error: wxTheApp == NULL\n" );
 219         return 0;
 220     };
 221
 222     wxTheApp->SetClassName(wxFileNameFromPath(argv[0]));
 223     wxTheApp->SetAppName(wxFileNameFromPath(argv[0]));
 224
 225     wxTheApp->argc = argc;
 226     wxTheApp->argv = argv;
 227
 228     // GUI-specific initialization, such as creating an app context.
 229     wxTheApp->OnInitGui();
 230
 231     // Here frames insert themselves automatically into wxTopLevelWindows by
 232     // getting created in OnInit().
 233
 234     int retValue = 0;
 235     if (wxTheApp->OnInit())
 236     {
 237         if (wxTheApp->Initialized()) retValue = wxTheApp->OnRun();
 238     }
 239
 240     // flush the logged messages if any
 241     wxLog *pLog = wxLog::GetActiveTarget();
 242     if ( pLog != NULL && pLog->HasPendingMessages() )
 243         pLog->Flush();
 244
 245     delete wxLog::SetActiveTarget(new wxLogStderr); // So dialog boxes aren't used
 246     // for further messages
 247
 248     if (wxTheApp->GetTopWindow())
 249     {
 250         delete wxTheApp->GetTopWindow();
 251         wxTheApp->SetTopWindow(NULL);
 252     }
 253
 254     wxTheApp->DeletePendingObjects();
 255
 256     wxTheApp->OnExit();
 257
 258     wxApp::CleanUp();
 259
 260     return retValue;
 261 };
 262
 263 // Static member initialization
 264 wxAppInitializerFunction wxApp::m_appInitFn = (wxAppInitializerFunction) NULL;
 265
 266 wxApp::wxApp()
 267 {
 268     m_topWindow = NULL;
 269     wxTheApp = this;
 270     m_className = "";
 271     m_wantDebugOutput = TRUE ;
 272     m_appName = "";
 273     argc = 0;
 274     argv = NULL;
 275     m_printMode = wxPRINT_POSTSCRIPT;
 276     m_exitOnFrameDelete = TRUE;
 277     m_auto3D = TRUE;
 278
 279     m_mainColormap = (WXColormap) NULL;
 280     m_appContext = (WXAppContext) NULL;
 281     m_topLevelWidget = (WXWidget) NULL;
 282     m_maxRequestSize = 0;
 283     m_initialDisplay = (WXDisplay*) 0;
 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     m_keepGoing = TRUE;
 297
 298     /*
 299     * Sit around forever waiting to process X-events. Property Change
 300     * event are handled special, because they have to refer to
 301     * the root window rather than to a widget. therefore we can't
 302     * use an Xt-eventhandler.
 303     */
 304
 305     XSelectInput(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()),
 306         XDefaultRootWindow(XtDisplay((Widget) wxTheApp->GetTopLevelWidget())),
 307         PropertyChangeMask);
 308
 309     XEvent event;
 310
 311     // Use this flag to allow breaking the loop via wxApp::ExitMainLoop()
 312     while (m_keepGoing)
 313     {
 314         XtAppNextEvent( (XtAppContext) wxTheApp->GetAppContext(), &event);
 315
 316         ProcessXEvent((WXEvent*) & event);
 317
 318         if (XtAppPending( (XtAppContext) wxTheApp->GetAppContext() ) == 0)
 319         {
 320             if (!ProcessIdle())
 321             {
 322 #if wxUSE_THREADS
 323                 // leave the main loop to give other threads a chance to
 324                 // perform their GUI work
 325                 wxMutexGuiLeave();
 326                 wxUsleep(20);
 327                 wxMutexGuiEnter();
 328 #endif
 329             }
 330         }
 331
 332     }
 333
 334     return 0;
 335 }
 336
 337 // Processes an X event.
 338 void wxApp::ProcessXEvent(WXEvent* _event)
 339 {
 340     XEvent* event = (XEvent*) _event;
 341
 342     if ((event->type == KeyPress) && CheckForAccelerator(_event))
 343     {
 344         // Do nothing! We intercepted and processed the event as an accelerator.
 345         return;
 346     }
 347     else if (event->type == PropertyNotify)
 348     {
 349         HandlePropertyChange(_event);
 350         return;
 351     }
 352     else if (event->type == ResizeRequest)
 353     {
 354     /* Terry Gitnick <terryg@scientech.com> - 1/21/98
 355     * If resize event, don't resize until the last resize event for this
 356     * window is recieved. Prevents flicker as windows are resized.
 357         */
 358
 359         Display *disp = XtDisplay((Widget) wxTheApp->GetTopLevelWidget());
 360         Window win = event->xany.window;
 361         XEvent report;
 362
 363         //  to avoid flicker
 364         report = * event;
 365         while( XCheckTypedWindowEvent (disp, win, ResizeRequest, &report));
 366
 367         // TODO: when implementing refresh optimization, we can use
 368         // XtAddExposureToRegion to expand the window's paint region.
 369
 370         XtDispatchEvent(event);
 371     }
 372     else
 373     {
 374         XtDispatchEvent(event);
 375     }
 376 }
 377
 378 // Returns TRUE if more time is needed.
 379 bool wxApp::ProcessIdle()
 380 {
 381     wxIdleEvent event;
 382     event.SetEventObject(this);
 383     ProcessEvent(event);
 384
 385     return event.MoreRequested();
 386 }
 387
 388 void wxApp::ExitMainLoop()
 389 {
 390     m_keepGoing = FALSE;
 391 }
 392
 393 // Is a message/event pending?
 394 bool wxApp::Pending()
 395 {
 396     XFlush(XtDisplay( (Widget) wxTheApp->GetTopLevelWidget() ));
 397
 398     // Fix by Doug from STI, to prevent a stall if non-X event
 399     // is found.
 400     return ((XtAppPending( (XtAppContext) GetAppContext() ) & XtIMXEvent) != 0) ;
 401 }
 402
 403 // Dispatch a message.
 404 void wxApp::Dispatch()
 405 {
 406     //    XtAppProcessEvent( (XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 407
 408     XEvent event;
 409     XtAppNextEvent((XtAppContext) GetAppContext(), &event);
 410     ProcessXEvent((WXEvent*) & event);
 411 }
 412
 413 // This should be redefined in a derived class for
 414 // handling property change events for XAtom IPC.
 415 void wxApp::HandlePropertyChange(WXEvent *event)
 416 {
 417     // by default do nothing special
 418     XtDispatchEvent((XEvent*) event); /* let Motif do the work */
 419 }
 420
 421 void wxApp::OnIdle(wxIdleEvent& event)
 422 {
 423     static bool inOnIdle = FALSE;
 424
 425     // Avoid recursion (via ProcessEvent default case)
 426     if (inOnIdle)
 427         return;
 428
 429     inOnIdle = TRUE;
 430
 431     // 'Garbage' collection of windows deleted with Close().
 432     DeletePendingObjects();
 433
 434 #if wxUSE_THREADS
 435     // Flush pending events.
 436     ProcessPendingEvents();
 437 #endif
 438
 439     // flush the logged messages if any
 440     wxLog *pLog = wxLog::GetActiveTarget();
 441     if ( pLog != NULL && pLog->HasPendingMessages() )
 442         pLog->Flush();
 443
 444     // Send OnIdle events to all windows
 445     bool needMore = SendIdleEvents();
 446
 447     if (needMore)
 448         event.RequestMore(TRUE);
 449
 450     inOnIdle = FALSE;
 451 }
 452
 453 // Send idle event to all top-level windows
 454 bool wxApp::SendIdleEvents()
 455 {
 456     bool needMore = FALSE;
 457
 458     wxWindowList::Node* node = wxTopLevelWindows.GetFirst();
 459     while (node)
 460     {
 461         wxWindow* win = node->GetData();
 462         if (SendIdleEvents(win))
 463             needMore = TRUE;
 464         node = node->GetNext();
 465     }
 466
 467     return needMore;
 468 }
 469
 470 // Send idle event to window and all subwindows
 471 bool wxApp::SendIdleEvents(wxWindow* win)
 472 {
 473     bool needMore = FALSE;
 474
 475     wxIdleEvent event;
 476     event.SetEventObject(win);
 477     win->ProcessEvent(event);
 478
 479     if (event.MoreRequested())
 480         needMore = TRUE;
 481
 482     wxNode* node = win->GetChildren().First();
 483     while (node)
 484     {
 485         wxWindow* win = (wxWindow*) node->Data();
 486         if (SendIdleEvents(win))
 487             needMore = TRUE;
 488
 489         node = node->Next();
 490     }
 491     return needMore ;
 492 }
 493
 494 void wxApp::DeletePendingObjects()
 495 {
 496     wxNode *node = wxPendingDelete.First();
 497     while (node)
 498     {
 499         wxObject *obj = (wxObject *)node->Data();
 500
 501         delete obj;
 502
 503         if (wxPendingDelete.Member(obj))
 504             delete node;
 505
 506         // Deleting one object may have deleted other pending
 507         // objects, so start from beginning of list again.
 508         node = wxPendingDelete.First();
 509     }
 510 }
 511
 512 #if wxUSE_THREADS
 513 void wxApp::ProcessPendingEvents()
 514 {
 515     wxNode *node = wxPendingEvents->First();
 516     wxCriticalSectionLocker locker(*wxPendingEventsLocker);
 517
 518     while (node)
 519     {
 520         wxEvtHandler *handler = (wxEvtHandler *)node->Data();
 521
 522         handler->ProcessPendingEvents();
 523
 524         delete node;
 525         node = wxPendingEvents->First();
 526     }
 527 }
 528 #endif // wxUSE_THREADS
 529
 530 wxLog* wxApp::CreateLogTarget()
 531 {
 532     return new wxLogGui;
 533 }
 534
 535 wxWindow* wxApp::GetTopWindow() const
 536 {
 537     if (m_topWindow)
 538         return m_topWindow;
 539     else if (wxTopLevelWindows.GetCount() > 0)
 540         return wxTopLevelWindows.GetFirst()->GetData();
 541     else
 542         return NULL;
 543 }
 544
 545 // Create an application context
 546 bool wxApp::OnInitGui()
 547 {
 548     XtToolkitInitialize() ;
 549     wxTheApp->m_appContext = (WXAppContext) XtCreateApplicationContext() ;
 550     Display *dpy = XtOpenDisplay((XtAppContext) wxTheApp->m_appContext,(String)NULL,NULL,
 551         (const char*) wxTheApp->GetClassName(), NULL, 0,
 552 # if XtSpecificationRelease < 5
 553         (Cardinal*) &argc,
 554 # else
 555         &argc,
 556 # endif
 557         argv);
 558
 559     if (!dpy) {
 560         wxString className(wxTheApp->GetClassName());
 561         wxLogError(_("wxWindows could not open display for '%s': exiting."),
 562                    (const char*) className);
 563         exit(-1);
 564     }
 565     m_initialDisplay = (WXDisplay*) dpy;
 566
 567     wxTheApp->m_topLevelWidget = (WXWidget) XtAppCreateShell((String)NULL, (const char*) wxTheApp->GetClassName(),
 568         applicationShellWidgetClass,dpy,
 569         NULL,0) ;
 570
 571     // Add general resize proc
 572     XtActionsRec rec;
 573     rec.string = "resize";
 574     rec.proc = (XtActionProc)wxWidgetResizeProc;
 575     XtAppAddActions((XtAppContext) wxTheApp->m_appContext, &rec, 1);
 576
 577     GetMainColormap(dpy);
 578     m_maxRequestSize = XMaxRequestSize((Display*) dpy);
 579
 580     return TRUE;
 581 }
 582
 583 WXColormap wxApp::GetMainColormap(WXDisplay* display)
 584 {
 585     if (!display) /* Must be called first with non-NULL display */
 586         return m_mainColormap;
 587
 588     int defaultScreen = DefaultScreen((Display*) display);
 589     Screen* screen = XScreenOfDisplay((Display*) display, defaultScreen);
 590
 591     Colormap c = DefaultColormapOfScreen(screen);
 592
 593     if (!m_mainColormap)
 594         m_mainColormap = (WXColormap) c;
 595
 596     return (WXColormap) c;
 597 }
 598
 599 // Returns TRUE if an accelerator has been processed
 600 bool wxApp::CheckForAccelerator(WXEvent* event)
 601 {
 602     XEvent* xEvent = (XEvent*) event;
 603     if (xEvent->xany.type == KeyPress)
 604     {
 605         // Find a wxWindow for this window
 606         // TODO: should get display for the window, not the current display
 607         Widget widget = XtWindowToWidget((Display*) wxGetDisplay(), xEvent->xany.window);
 608         wxWindow* win = NULL;
 609
 610         // Find the first wxWindow that corresponds to this event window
 611         while (widget && !(win = wxGetWindowFromTable(widget)))
 612             widget = XtParent(widget);
 613
 614         if (!widget || !win)
 615             return FALSE;
 616
 617         wxKeyEvent keyEvent(wxEVT_CHAR);
 618         wxTranslateKeyEvent(keyEvent, win, (Widget) 0, xEvent);
 619
 620         // Now we have a wxKeyEvent and we have a wxWindow.
 621         // Go up the hierarchy until we find a matching accelerator,
 622         // or we get to the top.
 623         while (win)
 624         {
 625             if (win->ProcessAccelerator(keyEvent))
 626                 return TRUE;
 627             win = win->GetParent();
 628         }
 629         return FALSE;
 630     }
 631     return FALSE;
 632 }
 633
 634 void wxExit()
 635 {
 636     int retValue = 0;
 637     if (wxTheApp)
 638         retValue = wxTheApp->OnExit();
 639
 640     wxApp::CleanUp();
 641     /*
 642     * Exit in some platform-specific way. Not recommended that the app calls this:
 643     * only for emergencies.
 644     */
 645     exit(retValue);
 646 }
 647
 648 // Yield to other processes
 649 bool wxYield()
 650 {
 651     while (wxTheApp && wxTheApp->Pending())
 652         wxTheApp->Dispatch();
 653
 654     // VZ: is it the same as this (taken from old wxExecute)?
 655 #if 0
 656     XtAppProcessEvent((XtAppContext) wxTheApp->GetAppContext(), XtIMAll);
 657 #endif
 658
 659     return TRUE;
 660 }
 661