src/common/event.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        event.cpp
   3 // Purpose:     Event classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "event.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/defs.h"
  33     #include "wx/app.h"
  34     #include "wx/list.h"
  35
  36     #if wxUSE_GUI
  37         #include "wx/control.h"
  38         #include "wx/utils.h"
  39         #include "wx/dc.h"
  40     #endif // wxUSE_GUI
  41 #endif
  42
  43 #include "wx/event.h"
  44
  45 #if wxUSE_GUI
  46     #include "wx/validate.h"
  47 #endif // wxUSE_GUI
  48
  49 // ----------------------------------------------------------------------------
  50 // wxWin macros
  51 // ----------------------------------------------------------------------------
  52
  53     IMPLEMENT_DYNAMIC_CLASS(wxEvtHandler, wxObject)
  54     IMPLEMENT_ABSTRACT_CLASS(wxEvent, wxObject)
  55     IMPLEMENT_DYNAMIC_CLASS(wxIdleEvent, wxEvent)
  56
  57     #if wxUSE_GUI
  58         IMPLEMENT_DYNAMIC_CLASS(wxCommandEvent, wxEvent)
  59         IMPLEMENT_DYNAMIC_CLASS(wxNotifyEvent, wxCommandEvent)
  60         IMPLEMENT_DYNAMIC_CLASS(wxScrollEvent, wxCommandEvent)
  61         IMPLEMENT_DYNAMIC_CLASS(wxScrollWinEvent, wxEvent)
  62         IMPLEMENT_DYNAMIC_CLASS(wxMouseEvent, wxEvent)
  63         IMPLEMENT_DYNAMIC_CLASS(wxKeyEvent, wxEvent)
  64         IMPLEMENT_DYNAMIC_CLASS(wxSizeEvent, wxEvent)
  65         IMPLEMENT_DYNAMIC_CLASS(wxPaintEvent, wxEvent)
  66         IMPLEMENT_DYNAMIC_CLASS(wxEraseEvent, wxEvent)
  67         IMPLEMENT_DYNAMIC_CLASS(wxMoveEvent, wxEvent)
  68         IMPLEMENT_DYNAMIC_CLASS(wxFocusEvent, wxEvent)
  69         IMPLEMENT_DYNAMIC_CLASS(wxCloseEvent, wxEvent)
  70         IMPLEMENT_DYNAMIC_CLASS(wxShowEvent, wxEvent)
  71         IMPLEMENT_DYNAMIC_CLASS(wxMaximizeEvent, wxEvent)
  72         IMPLEMENT_DYNAMIC_CLASS(wxIconizeEvent, wxEvent)
  73         IMPLEMENT_DYNAMIC_CLASS(wxMenuEvent, wxEvent)
  74         IMPLEMENT_DYNAMIC_CLASS(wxJoystickEvent, wxEvent)
  75         IMPLEMENT_DYNAMIC_CLASS(wxDropFilesEvent, wxEvent)
  76         IMPLEMENT_DYNAMIC_CLASS(wxActivateEvent, wxEvent)
  77         IMPLEMENT_DYNAMIC_CLASS(wxInitDialogEvent, wxEvent)
  78         IMPLEMENT_DYNAMIC_CLASS(wxSysColourChangedEvent, wxEvent)
  79         IMPLEMENT_DYNAMIC_CLASS(wxUpdateUIEvent, wxCommandEvent)
  80         IMPLEMENT_DYNAMIC_CLASS(wxNavigationKeyEvent, wxCommandEvent)
  81         IMPLEMENT_DYNAMIC_CLASS(wxPaletteChangedEvent, wxEvent)
  82         IMPLEMENT_DYNAMIC_CLASS(wxQueryNewPaletteEvent, wxEvent)
  83         IMPLEMENT_DYNAMIC_CLASS(wxWindowCreateEvent, wxEvent)
  84         IMPLEMENT_DYNAMIC_CLASS(wxWindowDestroyEvent, wxEvent)
  85     #endif // wxUSE_GUI
  86
  87     const wxEventTable *wxEvtHandler::GetEventTable() const
  88         { return &wxEvtHandler::sm_eventTable; }
  89
  90     const wxEventTable wxEvtHandler::sm_eventTable =
  91         { (const wxEventTable *)NULL, &wxEvtHandler::sm_eventTableEntries[0] };
  92
  93     const wxEventTableEntry wxEvtHandler::sm_eventTableEntries[] =
  94         { { 0, 0, 0, (wxObjectEventFunction) NULL, (wxObject*) NULL } };
  95
  96
  97 // ----------------------------------------------------------------------------
  98 // global variables
  99 // ----------------------------------------------------------------------------
 100
 101 // To put pending event handlers
 102 wxList *wxPendingEvents = (wxList *)NULL;
 103
 104 #if wxUSE_THREADS
 105     // protects wxPendingEvents list
 106     wxCriticalSection *wxPendingEventsLocker = (wxCriticalSection *)NULL;
 107 #endif
 108
 109 // ============================================================================
 110 // implementation
 111 // ============================================================================
 112
 113 // ----------------------------------------------------------------------------
 114 // wxEvent
 115 // ----------------------------------------------------------------------------
 116
 117 /*
 118  * General wxWindows events, covering
 119  * all interesting things that might happen (button clicking, resizing,
 120  * setting text in widgets, etc.).
 121  *
 122  * For each completely new event type, derive a new event class.
 123  *
 124  */
 125
 126 wxEvent::wxEvent(int theId)
 127 {
 128     m_eventType = wxEVT_NULL;
 129     m_eventObject = (wxObject *) NULL;
 130     m_timeStamp = 0;
 131     m_id = theId;
 132     m_skipped = FALSE;
 133     m_callbackUserData = (wxObject *) NULL;
 134     m_isCommandEvent = FALSE;
 135 }
 136
 137 void wxEvent::CopyObject(wxObject& object_dest) const
 138 {
 139     wxEvent *obj = (wxEvent *)&object_dest;
 140     wxObject::CopyObject(object_dest);
 141
 142     obj->m_eventType = m_eventType;
 143     obj->m_eventObject = m_eventObject;
 144     obj->m_timeStamp = m_timeStamp;
 145     obj->m_id = m_id;
 146     obj->m_skipped = m_skipped;
 147     obj->m_callbackUserData = m_callbackUserData;
 148     obj->m_isCommandEvent = m_isCommandEvent;
 149 }
 150
 151 #if wxUSE_GUI
 152
 153 /*
 154  * Command events
 155  *
 156  */
 157
 158 wxCommandEvent::wxCommandEvent(wxEventType commandType, int theId)
 159 {
 160     m_eventType = commandType;
 161     m_clientData = (char *) NULL;
 162     m_clientObject = (wxClientData *) NULL;
 163     m_extraLong = 0;
 164     m_commandInt = 0;
 165     m_id = theId;
 166     m_commandString = wxEmptyString;
 167     m_isCommandEvent = TRUE;
 168 }
 169
 170 void wxCommandEvent::CopyObject(wxObject& obj_d) const
 171 {
 172     wxCommandEvent *obj = (wxCommandEvent *)&obj_d;
 173
 174     wxEvent::CopyObject(obj_d);
 175
 176     obj->m_clientData    = m_clientData;
 177     obj->m_clientObject  = m_clientObject;
 178     obj->m_extraLong     = m_extraLong;
 179     obj->m_commandInt    = m_commandInt;
 180     obj->m_commandString = m_commandString;
 181 }
 182
 183 /*
 184  * Notify events
 185  */
 186
 187 void wxNotifyEvent::CopyObject(wxObject& obj_d) const
 188 {
 189     wxNotifyEvent *obj = (wxNotifyEvent *)&obj_d;
 190
 191     wxEvent::CopyObject(obj_d);
 192
 193     if (!m_bAllow) obj->Veto();
 194 }
 195
 196 /*
 197  * Scroll events
 198  */
 199
 200 wxScrollEvent::wxScrollEvent(wxEventType commandType,
 201                              int id,
 202                              int pos,
 203                              int orient)
 204              : wxCommandEvent(commandType, id)
 205 {
 206     m_extraLong = orient;
 207     m_commandInt = pos;
 208     m_isScrolling = TRUE;
 209 }
 210
 211 void wxScrollEvent::CopyObject(wxObject& obj_d) const
 212 {
 213     wxScrollEvent *obj = (wxScrollEvent*)&obj_d;
 214
 215     wxCommandEvent::CopyObject(obj_d);
 216
 217     obj->m_isScrolling  = m_isScrolling;
 218 }
 219
 220 /*
 221  * ScrollWin events
 222  */
 223
 224 wxScrollWinEvent::wxScrollWinEvent(wxEventType commandType,
 225                                    int pos,
 226                                    int orient)
 227 {
 228     m_eventType = commandType;
 229     m_extraLong = orient;
 230     m_commandInt = pos;
 231     m_isScrolling = TRUE;
 232 }
 233
 234 void wxScrollWinEvent::CopyObject(wxObject& obj_d) const
 235 {
 236     wxScrollWinEvent *obj = (wxScrollWinEvent*)&obj_d;
 237
 238     wxEvent::CopyObject(obj_d);
 239
 240     obj->m_extraLong    = m_extraLong;
 241     obj->m_commandInt   = m_commandInt;
 242     obj->m_isScrolling  = m_isScrolling;
 243 }
 244
 245 /*
 246  * Mouse events
 247  *
 248  */
 249
 250 wxMouseEvent::wxMouseEvent(wxEventType commandType)
 251 {
 252     m_eventType = commandType;
 253     m_metaDown = FALSE;
 254     m_altDown = FALSE;
 255     m_controlDown = FALSE;
 256     m_shiftDown = FALSE;
 257     m_leftDown = FALSE;
 258     m_rightDown = FALSE;
 259     m_middleDown = FALSE;
 260     m_x = 0;
 261     m_y = 0;
 262 }
 263
 264 void wxMouseEvent::CopyObject(wxObject& obj_d) const
 265 {
 266     wxMouseEvent *obj = (wxMouseEvent *)&obj_d;
 267
 268     wxEvent::CopyObject(obj_d);
 269
 270     obj->m_metaDown = m_metaDown;
 271     obj->m_altDown = m_altDown;
 272     obj->m_controlDown = m_controlDown;
 273     obj->m_shiftDown = m_shiftDown;
 274     obj->m_leftDown = m_leftDown;
 275     obj->m_rightDown = m_rightDown;
 276     obj->m_middleDown = m_middleDown;
 277     obj->m_x = m_x;
 278     obj->m_y = m_y;
 279 }
 280
 281 // True if was a button dclick event (1 = left, 2 = middle, 3 = right)
 282 // or any button dclick event (but = -1)
 283 bool wxMouseEvent::ButtonDClick(int but) const
 284 {
 285     switch (but)
 286     {
 287         case -1:
 288             return (LeftDClick() || MiddleDClick() || RightDClick());
 289         case 1:
 290             return LeftDClick();
 291         case 2:
 292             return MiddleDClick();
 293         case 3:
 294             return RightDClick();
 295         default:
 296             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDClick"));
 297     }
 298
 299     return FALSE;
 300 }
 301
 302 // True if was a button down event (1 = left, 2 = middle, 3 = right)
 303 // or any button down event (but = -1)
 304 bool wxMouseEvent::ButtonDown(int but) const
 305 {
 306     switch (but)
 307     {
 308         case -1:
 309             return (LeftDown() || MiddleDown() || RightDown());
 310         case 1:
 311             return LeftDown();
 312         case 2:
 313             return MiddleDown();
 314         case 3:
 315             return RightDown();
 316         default:
 317             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDown"));
 318     }
 319
 320     return FALSE;
 321 }
 322
 323 // True if was a button up event (1 = left, 2 = middle, 3 = right)
 324 // or any button up event (but = -1)
 325 bool wxMouseEvent::ButtonUp(int but) const
 326 {
 327     switch (but) {
 328         case -1:
 329             return (LeftUp() || MiddleUp() || RightUp());
 330         case 1:
 331             return LeftUp();
 332         case 2:
 333             return MiddleUp();
 334         case 3:
 335             return RightUp();
 336         default:
 337             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonUp"));
 338     }
 339
 340     return FALSE;
 341 }
 342
 343 // True if the given button is currently changing state
 344 bool wxMouseEvent::Button(int but) const
 345 {
 346     switch (but) {
 347         case -1:
 348             return (ButtonUp(-1) || ButtonDown(-1) || ButtonDClick(-1));
 349         case 1:
 350             return (LeftDown() || LeftUp() || LeftDClick());
 351         case 2:
 352             return (MiddleDown() || MiddleUp() || MiddleDClick());
 353         case 3:
 354             return (RightDown() || RightUp() || RightDClick());
 355         default:
 356             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::Button"));
 357     }
 358
 359     return FALSE;
 360 }
 361
 362 bool wxMouseEvent::ButtonIsDown(int but) const
 363 {
 364     switch (but) {
 365         case -1:
 366             return (LeftIsDown() || MiddleIsDown() || RightIsDown());
 367         case 1:
 368             return LeftIsDown();
 369         case 2:
 370             return MiddleIsDown();
 371         case 3:
 372             return RightIsDown();
 373         default:
 374             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonIsDown"));
 375     }
 376
 377     return FALSE;
 378 }
 379
 380 // Find the logical position of the event given the DC
 381 wxPoint wxMouseEvent::GetLogicalPosition(const wxDC& dc) const
 382 {
 383     wxPoint pt(dc.DeviceToLogicalX(m_x), dc.DeviceToLogicalY(m_y));
 384     return pt;
 385 }
 386
 387
 388 /*
 389  * Keyboard events
 390  *
 391  */
 392
 393 wxKeyEvent::wxKeyEvent(wxEventType type)
 394 {
 395     m_eventType = type;
 396     m_shiftDown = FALSE;
 397     m_controlDown = FALSE;
 398     m_metaDown = FALSE;
 399     m_altDown = FALSE;
 400     m_keyCode = 0;
 401     m_scanCode = 0;
 402 }
 403
 404 void wxKeyEvent::CopyObject(wxObject& obj_d) const
 405 {
 406     wxKeyEvent *obj = (wxKeyEvent *)&obj_d;
 407     wxEvent::CopyObject(obj_d);
 408
 409     obj->m_x = m_x;
 410     obj->m_y = m_y;
 411     obj->m_keyCode = m_keyCode;
 412
 413     obj->m_shiftDown   = m_shiftDown;
 414     obj->m_controlDown = m_controlDown;
 415     obj->m_metaDown    = m_metaDown;
 416     obj->m_altDown     = m_altDown;
 417     obj->m_keyCode     = m_keyCode;
 418 }
 419
 420
 421 /*
 422  * Misc events
 423  */
 424
 425 void wxSizeEvent::CopyObject(wxObject& obj_d) const
 426 {
 427     wxSizeEvent *obj = (wxSizeEvent *)&obj_d;
 428     wxEvent::CopyObject(obj_d);
 429
 430     obj->m_size = m_size;
 431 }
 432
 433 void wxMoveEvent::CopyObject(wxObject& obj_d) const
 434 {
 435     wxMoveEvent *obj = (wxMoveEvent *)&obj_d;
 436     wxEvent::CopyObject(obj_d);
 437
 438     obj->m_pos = m_pos;
 439 }
 440
 441 void wxEraseEvent::CopyObject(wxObject& obj_d) const
 442 {
 443     wxEraseEvent *obj = (wxEraseEvent *)&obj_d;
 444     wxEvent::CopyObject(obj_d);
 445
 446     obj->m_dc = m_dc;
 447 }
 448
 449 void wxActivateEvent::CopyObject(wxObject& obj_d) const
 450 {
 451     wxActivateEvent *obj = (wxActivateEvent *)&obj_d;
 452     wxEvent::CopyObject(obj_d);
 453
 454     obj->m_active = m_active;
 455 }
 456
 457 void wxMenuEvent::CopyObject(wxObject& obj_d) const
 458 {
 459     wxMenuEvent *obj = (wxMenuEvent *)&obj_d;
 460     wxEvent::CopyObject(obj_d);
 461
 462     obj->m_menuId = m_menuId;
 463 }
 464
 465 void wxCloseEvent::CopyObject(wxObject& obj_d) const
 466 {
 467     wxCloseEvent *obj = (wxCloseEvent *)&obj_d;
 468     wxEvent::CopyObject(obj_d);
 469
 470     obj->m_loggingOff = m_loggingOff;
 471     obj->m_veto = m_veto;
 472 #if WXWIN_COMPATIBILITY
 473     obj->m_force = m_force;
 474 #endif
 475     obj->m_canVeto = m_canVeto;
 476 }
 477
 478 void wxShowEvent::CopyObject(wxObject& obj_d) const
 479 {
 480     wxShowEvent *obj = (wxShowEvent *)&obj_d;
 481     wxEvent::CopyObject(obj_d);
 482
 483     obj->m_show = m_show;
 484 }
 485
 486 void wxJoystickEvent::CopyObject(wxObject& obj_d) const
 487 {
 488     wxJoystickEvent *obj = (wxJoystickEvent *)&obj_d;
 489     wxEvent::CopyObject(obj_d);
 490
 491     obj->m_pos = m_pos;
 492     obj->m_zPosition = m_zPosition;
 493     obj->m_buttonChange = m_buttonChange;
 494     obj->m_buttonState = m_buttonState;
 495     obj->m_joyStick = m_joyStick;
 496 }
 497
 498 void wxDropFilesEvent::CopyObject(wxObject& obj_d) const
 499 {
 500     wxDropFilesEvent *obj = (wxDropFilesEvent *)&obj_d;
 501     wxEvent::CopyObject(obj_d);
 502
 503     obj->m_noFiles = m_noFiles;
 504     obj->m_pos = m_pos;
 505     // TODO: Problem with obj->m_files. It should be deallocated by the
 506     // destructor of the event.
 507 }
 508
 509 void wxUpdateUIEvent::CopyObject(wxObject &obj_d) const
 510 {
 511     wxUpdateUIEvent *obj = (wxUpdateUIEvent *)&obj_d;
 512     wxEvent::CopyObject(obj_d);
 513
 514     obj->m_checked = m_checked;
 515     obj->m_enabled = m_enabled;
 516     obj->m_text = m_text;
 517     obj->m_setText = m_setText;
 518     obj->m_setChecked = m_setChecked;
 519     obj->m_setEnabled = m_setEnabled;
 520 }
 521
 522 void wxPaletteChangedEvent::CopyObject(wxObject &obj_d) const
 523 {
 524     wxPaletteChangedEvent *obj = (wxPaletteChangedEvent *)&obj_d;
 525     wxEvent::CopyObject(obj_d);
 526
 527     obj->m_changedWindow = m_changedWindow;
 528 }
 529
 530 void wxQueryNewPaletteEvent::CopyObject(wxObject& obj_d) const
 531 {
 532     wxQueryNewPaletteEvent *obj = (wxQueryNewPaletteEvent *)&obj_d;
 533     wxEvent::CopyObject(obj_d);
 534
 535     obj->m_paletteRealized = m_paletteRealized;
 536 }
 537
 538 wxWindowCreateEvent::wxWindowCreateEvent(wxWindow *win)
 539                    : wxEvent()
 540 {
 541     SetEventType(wxEVT_CREATE);
 542     SetEventObject(win);
 543 }
 544
 545 wxWindowDestroyEvent::wxWindowDestroyEvent(wxWindow *win)
 546                     : wxEvent()
 547 {
 548     SetEventType(wxEVT_DESTROY);
 549     SetEventObject(win);
 550 }
 551
 552 #endif // wxUSE_GUI
 553
 554 void wxIdleEvent::CopyObject(wxObject& obj_d) const
 555 {
 556     wxIdleEvent *obj = (wxIdleEvent *)&obj_d;
 557     wxEvent::CopyObject(obj_d);
 558
 559     obj->m_requestMore = m_requestMore;
 560 }
 561
 562 /*
 563  * Event handler
 564  */
 565
 566 wxEvtHandler::wxEvtHandler()
 567 {
 568     m_nextHandler = (wxEvtHandler *) NULL;
 569     m_previousHandler = (wxEvtHandler *) NULL;
 570     m_enabled = TRUE;
 571     m_dynamicEvents = (wxList *) NULL;
 572     m_isWindow = FALSE;
 573     m_pendingEvents = (wxList *) NULL;
 574 #if wxUSE_THREADS
 575 #  if !defined(__VISAGECPP__)
 576     m_eventsLocker = new wxCriticalSection;
 577 #  endif
 578 #endif
 579 }
 580
 581 wxEvtHandler::~wxEvtHandler()
 582 {
 583     // Takes itself out of the list of handlers
 584     if (m_previousHandler)
 585         m_previousHandler->m_nextHandler = m_nextHandler;
 586
 587     if (m_nextHandler)
 588         m_nextHandler->m_previousHandler = m_previousHandler;
 589
 590     if (m_dynamicEvents)
 591     {
 592         wxNode *node = m_dynamicEvents->First();
 593         while (node)
 594         {
 595             wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 596             if (entry->m_callbackUserData) delete entry->m_callbackUserData;
 597             delete entry;
 598             node = node->Next();
 599         }
 600         delete m_dynamicEvents;
 601     };
 602
 603     delete m_pendingEvents;
 604
 605 #if wxUSE_THREADS
 606 #  if !defined(__VISAGECPP__)
 607     delete m_eventsLocker;
 608 #  endif
 609 #endif
 610 }
 611
 612 #if wxUSE_THREADS
 613
 614 bool wxEvtHandler::ProcessThreadEvent(wxEvent& event)
 615 {
 616     // check that we are really in a child thread
 617     wxASSERT_MSG( !wxThread::IsMain(),
 618                   wxT("use ProcessEvent() in main thread") );
 619
 620     AddPendingEvent(event);
 621
 622     return TRUE;
 623 }
 624
 625 #endif // wxUSE_THREADS
 626
 627 void wxEvtHandler::AddPendingEvent(wxEvent& event)
 628 {
 629     // 1) Add event to list of pending events of this event handler
 630
 631 #if defined(__VISAGECPP__)
 632     wxENTER_CRIT_SECT( m_eventsLocker);
 633 #else
 634     wxENTER_CRIT_SECT( *m_eventsLocker);
 635 #endif
 636
 637     if ( !m_pendingEvents )
 638       m_pendingEvents = new wxList;
 639
 640     wxEvent *event2 = (wxEvent *)event.Clone();
 641
 642     m_pendingEvents->Append(event2);
 643
 644 #if defined(__VISAGECPP__)
 645     wxLEAVE_CRIT_SECT( m_eventsLocker);
 646 #else
 647     wxLEAVE_CRIT_SECT( *m_eventsLocker);
 648 #endif
 649
 650     // 2) Add this event handler to list of event handlers that
 651     //    have pending events.
 652
 653     wxENTER_CRIT_SECT(*wxPendingEventsLocker);
 654
 655     if ( !wxPendingEvents )
 656         wxPendingEvents = new wxList;
 657     wxPendingEvents->Append(this);
 658
 659     wxLEAVE_CRIT_SECT(*wxPendingEventsLocker);
 660
 661     // 3) Inform the system that new pending events are somwehere,
 662     //    and that these should be processed in idle time.
 663     wxWakeUpIdle();
 664 }
 665
 666 void wxEvtHandler::ProcessPendingEvents()
 667 {
 668 #if defined(__VISAGECPP__)
 669     wxENTER_CRIT_SECT( m_eventsLocker);
 670 #else
 671     wxENTER_CRIT_SECT( *m_eventsLocker);
 672 #endif
 673
 674     wxNode *node = m_pendingEvents->First();
 675     while ( node )
 676     {
 677         wxEvent *event = (wxEvent *)node->Data();
 678         delete node;
 679
 680         // In ProcessEvent, new events might get added and
 681             // we can safely leave the crtical section here.
 682 #if defined(__VISAGECPP__)
 683         wxLEAVE_CRIT_SECT( m_eventsLocker);
 684 #else
 685         wxLEAVE_CRIT_SECT( *m_eventsLocker);
 686 #endif
 687         ProcessEvent(*event);
 688         delete event;
 689 #if defined(__VISAGECPP__)
 690         wxENTER_CRIT_SECT( m_eventsLocker);
 691 #else
 692         wxENTER_CRIT_SECT( *m_eventsLocker);
 693 #endif
 694
 695         node = m_pendingEvents->First();
 696     }
 697
 698 #if defined(__VISAGECPP__)
 699     wxLEAVE_CRIT_SECT( m_eventsLocker);
 700 #else
 701     wxLEAVE_CRIT_SECT( *m_eventsLocker);
 702 #endif
 703 }
 704
 705 /*
 706  * Event table stuff
 707  */
 708
 709 bool wxEvtHandler::ProcessEvent(wxEvent& event)
 710 {
 711 #if wxUSE_GUI
 712     // check that our flag corresponds to reality
 713     wxASSERT( m_isWindow == IsKindOf(CLASSINFO(wxWindow)) );
 714 #endif // wxUSE_GUI
 715
 716     // An event handler can be enabled or disabled
 717     if ( GetEvtHandlerEnabled() )
 718     {
 719
 720 #if 0
 721 /*
 722         What is this? When using GUI threads, a non main
 723         threads can send an event and process it itself.
 724         This breaks GTK's GUI threads, so please explain.
 725 */
 726
 727         // Check whether we are in a child thread.
 728         if ( !wxThread::IsMain() )
 729           return ProcessThreadEvent(event);
 730 #endif
 731
 732         // Handle per-instance dynamic event tables first
 733         if ( m_dynamicEvents && SearchDynamicEventTable(event) )
 734             return TRUE;
 735
 736         // Then static per-class event tables
 737         const wxEventTable *table = GetEventTable();
 738
 739 #if wxUSE_GUI && wxUSE_VALIDATORS
 740         // Try the associated validator first, if this is a window.
 741         // Problem: if the event handler of the window has been replaced,
 742         // this wxEvtHandler may no longer be a window.
 743         // Therefore validators won't be processed if the handler
 744         // has been replaced with SetEventHandler.
 745         // THIS CAN BE CURED if PushEventHandler is used instead of
 746         // SetEventHandler, and then processing will be passed down the
 747         // chain of event handlers.
 748         if (m_isWindow)
 749         {
 750             wxWindow *win = (wxWindow *)this;
 751
 752             // Can only use the validator of the window which
 753             // is receiving the event
 754             if ( win == event.GetEventObject() )
 755             {
 756                 wxValidator *validator = win->GetValidator();
 757                 if ( validator && validator->ProcessEvent(event) )
 758                 {
 759                     return TRUE;
 760                 }
 761             }
 762         }
 763 #endif
 764
 765         // Search upwards through the inheritance hierarchy
 766         while (table)
 767         {
 768             if ( SearchEventTable((wxEventTable&)*table, event) )
 769                 return TRUE;
 770             table = table->baseTable;
 771         }
 772     }
 773
 774     // Try going down the event handler chain
 775     if ( GetNextHandler() )
 776     {
 777         if ( GetNextHandler()->ProcessEvent(event) )
 778             return TRUE;
 779     }
 780
 781 #if wxUSE_GUI
 782     // Carry on up the parent-child hierarchy,
 783     // but only if event is a command event: it wouldn't
 784     // make sense for a parent to receive a child's size event, for example
 785     if ( m_isWindow && event.IsCommandEvent() )
 786     {
 787         wxWindow *win = (wxWindow *)this;
 788         wxWindow *parent = win->GetParent();
 789         if (parent && !parent->IsBeingDeleted())
 790             return parent->GetEventHandler()->ProcessEvent(event);
 791     }
 792 #endif // wxUSE_GUI
 793
 794     // Last try - application object.
 795     if ( wxTheApp && (this != wxTheApp) )
 796     {
 797         // Special case: don't pass wxEVT_IDLE to wxApp, since it'll always
 798         // swallow it. wxEVT_IDLE is sent explicitly to wxApp so it will be
 799         // processed appropriately via SearchEventTable.
 800         if ( event.GetEventType() != wxEVT_IDLE )
 801         {
 802             if ( wxTheApp->ProcessEvent(event) )
 803                 return TRUE;
 804         }
 805     }
 806
 807     return FALSE;
 808 }
 809
 810 bool wxEvtHandler::SearchEventTable(wxEventTable& table, wxEvent& event)
 811 {
 812     int i = 0;
 813     int commandId = event.GetId();
 814
 815     // BC++ doesn't like while (table.entries[i].m_fn)
 816
 817 #ifdef __SC__
 818     while (table.entries[i].m_fn != 0)
 819 #else
 820     while (table.entries[i].m_fn != 0L)
 821 #endif
 822     {
 823         if ((event.GetEventType() == table.entries[i].m_eventType) &&
 824                 (table.entries[i].m_id == -1 || // Match, if event spec says any id will do (id == -1)
 825                  (table.entries[i].m_lastId == -1 && commandId == table.entries[i].m_id) ||
 826                  (table.entries[i].m_lastId != -1 &&
 827                   (commandId >= table.entries[i].m_id && commandId <= table.entries[i].m_lastId))))
 828         {
 829             event.Skip(FALSE);
 830             event.m_callbackUserData = table.entries[i].m_callbackUserData;
 831
 832             (this->*((wxEventFunction) (table.entries[i].m_fn)))(event);
 833
 834             if ( event.GetSkipped() )
 835                 return FALSE;
 836             else
 837                 return TRUE;
 838         }
 839         i++;
 840     }
 841     return FALSE;
 842 }
 843
 844 void wxEvtHandler::Connect( int id, int lastId,
 845                             wxEventType eventType,
 846                             wxObjectEventFunction func,
 847                             wxObject *userData )
 848 {
 849     wxEventTableEntry *entry = new wxEventTableEntry;
 850     entry->m_id = id;
 851     entry->m_lastId = lastId;
 852     entry->m_eventType = eventType;
 853     entry->m_fn = func;
 854     entry->m_callbackUserData = userData;
 855
 856     if (!m_dynamicEvents)
 857         m_dynamicEvents = new wxList;
 858
 859     m_dynamicEvents->Append( (wxObject*) entry );
 860 }
 861
 862 bool wxEvtHandler::Disconnect( int id, int lastId, wxEventType eventType,
 863                   wxObjectEventFunction func,
 864                   wxObject *userData )
 865 {
 866     if (!m_dynamicEvents)
 867         return FALSE;
 868
 869     wxNode *node = m_dynamicEvents->First();
 870     while (node)
 871     {
 872         wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 873         if ((entry->m_id == id) &&
 874             ((entry->m_lastId == lastId) || (lastId == -1)) &&
 875             ((entry->m_eventType == eventType) || (eventType == wxEVT_NULL)) &&
 876             ((entry->m_fn == func) || (func == (wxObjectEventFunction)NULL)) &&
 877             ((entry->m_callbackUserData == userData) || (userData == (wxObject*)NULL)))
 878         {
 879             if (entry->m_callbackUserData) delete entry->m_callbackUserData;
 880             m_dynamicEvents->DeleteNode( node );
 881             delete entry;
 882             return TRUE;
 883         }
 884         node = node->Next();
 885     }
 886     return FALSE;
 887 }
 888
 889 bool wxEvtHandler::SearchDynamicEventTable( wxEvent& event )
 890 {
 891     wxCHECK_MSG( m_dynamicEvents, FALSE,
 892                  wxT("caller should check that we have dynamic events") );
 893
 894     int commandId = event.GetId();
 895
 896     wxNode *node = m_dynamicEvents->First();
 897     while (node)
 898     {
 899         wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 900
 901         if (entry->m_fn)
 902         {
 903             // Match, if event spec says any id will do (id == -1)
 904             if ( (event.GetEventType() == entry->m_eventType) &&
 905                  (entry->m_id == -1 ||
 906                   (entry->m_lastId == -1 && commandId == entry->m_id) ||
 907                   (entry->m_lastId != -1 &&
 908                   (commandId >= entry->m_id && commandId <= entry->m_lastId))) )
 909             {
 910                 event.Skip(FALSE);
 911                 event.m_callbackUserData = entry->m_callbackUserData;
 912
 913                 (this->*((wxEventFunction) (entry->m_fn)))(event);
 914
 915                 if (event.GetSkipped())
 916                     return FALSE;
 917                 else
 918                     return TRUE;
 919             }
 920         }
 921         node = node->Next();
 922     }
 923     return FALSE;
 924 };
 925
 926 #if WXWIN_COMPATIBILITY
 927 bool wxEvtHandler::OnClose()
 928 {
 929     if (GetNextHandler())
 930         return GetNextHandler()->OnClose();
 931     else
 932         return FALSE;
 933 }
 934 #endif // WXWIN_COMPATIBILITY
 935
 936 #if wxUSE_GUI
 937
 938 // Find a window with the focus, that is also a descendant of the given window.
 939 // This is used to determine the window to initially send commands to.
 940 wxWindow* wxFindFocusDescendant(wxWindow* ancestor)
 941 {
 942     // Process events starting with the window with the focus, if any.
 943     wxWindow* focusWin = wxWindow::FindFocus();
 944     wxWindow* win = focusWin;
 945
 946     // Check if this is a descendant of this frame.
 947     // If not, win will be set to NULL.
 948     while (win)
 949     {
 950         if (win == ancestor)
 951             break;
 952         else
 953             win = win->GetParent();
 954     }
 955     if (win == (wxWindow*) NULL)
 956         focusWin = (wxWindow*) NULL;
 957
 958     return focusWin;
 959 }
 960
 961 #endif // wxUSE_GUI