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 <<<<<<< event.cpp
 209     m_isScrolling = TRUE;
 210 }
 211
 212 void wxScrollEvent::CopyObject(wxObject& obj_d) const
 213 {
 214     wxScrollEvent *obj = (wxScrollEvent*)&obj_d;
 215
 216     wxCommandEvent::CopyObject(obj_d);
 217
 218     obj->m_isScrolling  = m_isScrolling;
 219 =======
 220 >>>>>>> 1.69
 221 }
 222
 223 /*
 224  * ScrollWin events
 225  */
 226
 227 wxScrollWinEvent::wxScrollWinEvent(wxEventType commandType,
 228                                    int pos,
 229                                    int orient)
 230 {
 231     m_eventType = commandType;
 232     m_extraLong = orient;
 233     m_commandInt = pos;
 234 }
 235
 236 void wxScrollWinEvent::CopyObject(wxObject& obj_d) const
 237 {
 238     wxScrollWinEvent *obj = (wxScrollWinEvent*)&obj_d;
 239
 240     wxEvent::CopyObject(obj_d);
 241
 242     obj->m_extraLong    = m_extraLong;
 243     obj->m_commandInt   = m_commandInt;
 244 }
 245
 246 /*
 247  * Mouse events
 248  *
 249  */
 250
 251 wxMouseEvent::wxMouseEvent(wxEventType commandType)
 252 {
 253     m_eventType = commandType;
 254     m_metaDown = FALSE;
 255     m_altDown = FALSE;
 256     m_controlDown = FALSE;
 257     m_shiftDown = FALSE;
 258     m_leftDown = FALSE;
 259     m_rightDown = FALSE;
 260     m_middleDown = FALSE;
 261     m_x = 0;
 262     m_y = 0;
 263 }
 264
 265 void wxMouseEvent::CopyObject(wxObject& obj_d) const
 266 {
 267     wxMouseEvent *obj = (wxMouseEvent *)&obj_d;
 268
 269     wxEvent::CopyObject(obj_d);
 270
 271     obj->m_metaDown = m_metaDown;
 272     obj->m_altDown = m_altDown;
 273     obj->m_controlDown = m_controlDown;
 274     obj->m_shiftDown = m_shiftDown;
 275     obj->m_leftDown = m_leftDown;
 276     obj->m_rightDown = m_rightDown;
 277     obj->m_middleDown = m_middleDown;
 278     obj->m_x = m_x;
 279     obj->m_y = m_y;
 280 }
 281
 282 // True if was a button dclick event (1 = left, 2 = middle, 3 = right)
 283 // or any button dclick event (but = -1)
 284 bool wxMouseEvent::ButtonDClick(int but) const
 285 {
 286     switch (but)
 287     {
 288         case -1:
 289             return (LeftDClick() || MiddleDClick() || RightDClick());
 290         case 1:
 291             return LeftDClick();
 292         case 2:
 293             return MiddleDClick();
 294         case 3:
 295             return RightDClick();
 296         default:
 297             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDClick"));
 298     }
 299
 300     return FALSE;
 301 }
 302
 303 // True if was a button down event (1 = left, 2 = middle, 3 = right)
 304 // or any button down event (but = -1)
 305 bool wxMouseEvent::ButtonDown(int but) const
 306 {
 307     switch (but)
 308     {
 309         case -1:
 310             return (LeftDown() || MiddleDown() || RightDown());
 311         case 1:
 312             return LeftDown();
 313         case 2:
 314             return MiddleDown();
 315         case 3:
 316             return RightDown();
 317         default:
 318             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDown"));
 319     }
 320
 321     return FALSE;
 322 }
 323
 324 // True if was a button up event (1 = left, 2 = middle, 3 = right)
 325 // or any button up event (but = -1)
 326 bool wxMouseEvent::ButtonUp(int but) const
 327 {
 328     switch (but) {
 329         case -1:
 330             return (LeftUp() || MiddleUp() || RightUp());
 331         case 1:
 332             return LeftUp();
 333         case 2:
 334             return MiddleUp();
 335         case 3:
 336             return RightUp();
 337         default:
 338             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonUp"));
 339     }
 340
 341     return FALSE;
 342 }
 343
 344 // True if the given button is currently changing state
 345 bool wxMouseEvent::Button(int but) const
 346 {
 347     switch (but) {
 348         case -1:
 349             return (ButtonUp(-1) || ButtonDown(-1) || ButtonDClick(-1));
 350         case 1:
 351             return (LeftDown() || LeftUp() || LeftDClick());
 352         case 2:
 353             return (MiddleDown() || MiddleUp() || MiddleDClick());
 354         case 3:
 355             return (RightDown() || RightUp() || RightDClick());
 356         default:
 357             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::Button"));
 358     }
 359
 360     return FALSE;
 361 }
 362
 363 bool wxMouseEvent::ButtonIsDown(int but) const
 364 {
 365     switch (but) {
 366         case -1:
 367             return (LeftIsDown() || MiddleIsDown() || RightIsDown());
 368         case 1:
 369             return LeftIsDown();
 370         case 2:
 371             return MiddleIsDown();
 372         case 3:
 373             return RightIsDown();
 374         default:
 375             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonIsDown"));
 376     }
 377
 378     return FALSE;
 379 }
 380
 381 // Find the logical position of the event given the DC
 382 wxPoint wxMouseEvent::GetLogicalPosition(const wxDC& dc) const
 383 {
 384     wxPoint pt(dc.DeviceToLogicalX(m_x), dc.DeviceToLogicalY(m_y));
 385     return pt;
 386 }
 387
 388
 389 /*
 390  * Keyboard events
 391  *
 392  */
 393
 394 wxKeyEvent::wxKeyEvent(wxEventType type)
 395 {
 396     m_eventType = type;
 397     m_shiftDown = FALSE;
 398     m_controlDown = FALSE;
 399     m_metaDown = FALSE;
 400     m_altDown = FALSE;
 401     m_keyCode = 0;
 402     m_scanCode = 0;
 403 }
 404
 405 void wxKeyEvent::CopyObject(wxObject& obj_d) const
 406 {
 407     wxKeyEvent *obj = (wxKeyEvent *)&obj_d;
 408     wxEvent::CopyObject(obj_d);
 409
 410     obj->m_x = m_x;
 411     obj->m_y = m_y;
 412     obj->m_keyCode = m_keyCode;
 413
 414     obj->m_shiftDown   = m_shiftDown;
 415     obj->m_controlDown = m_controlDown;
 416     obj->m_metaDown    = m_metaDown;
 417     obj->m_altDown     = m_altDown;
 418     obj->m_keyCode     = m_keyCode;
 419 }
 420
 421
 422 /*
 423  * Misc events
 424  */
 425
 426 void wxSizeEvent::CopyObject(wxObject& obj_d) const
 427 {
 428     wxSizeEvent *obj = (wxSizeEvent *)&obj_d;
 429     wxEvent::CopyObject(obj_d);
 430
 431     obj->m_size = m_size;
 432 }
 433
 434 void wxMoveEvent::CopyObject(wxObject& obj_d) const
 435 {
 436     wxMoveEvent *obj = (wxMoveEvent *)&obj_d;
 437     wxEvent::CopyObject(obj_d);
 438
 439     obj->m_pos = m_pos;
 440 }
 441
 442 void wxEraseEvent::CopyObject(wxObject& obj_d) const
 443 {
 444     wxEraseEvent *obj = (wxEraseEvent *)&obj_d;
 445     wxEvent::CopyObject(obj_d);
 446
 447     obj->m_dc = m_dc;
 448 }
 449
 450 void wxActivateEvent::CopyObject(wxObject& obj_d) const
 451 {
 452     wxActivateEvent *obj = (wxActivateEvent *)&obj_d;
 453     wxEvent::CopyObject(obj_d);
 454
 455     obj->m_active = m_active;
 456 }
 457
 458 void wxMenuEvent::CopyObject(wxObject& obj_d) const
 459 {
 460     wxMenuEvent *obj = (wxMenuEvent *)&obj_d;
 461     wxEvent::CopyObject(obj_d);
 462
 463     obj->m_menuId = m_menuId;
 464 }
 465
 466 void wxCloseEvent::CopyObject(wxObject& obj_d) const
 467 {
 468     wxCloseEvent *obj = (wxCloseEvent *)&obj_d;
 469     wxEvent::CopyObject(obj_d);
 470
 471     obj->m_loggingOff = m_loggingOff;
 472     obj->m_veto = m_veto;
 473 #if WXWIN_COMPATIBILITY
 474     obj->m_force = m_force;
 475 #endif
 476     obj->m_canVeto = m_canVeto;
 477 }
 478
 479 void wxShowEvent::CopyObject(wxObject& obj_d) const
 480 {
 481     wxShowEvent *obj = (wxShowEvent *)&obj_d;
 482     wxEvent::CopyObject(obj_d);
 483
 484     obj->m_show = m_show;
 485 }
 486
 487 void wxJoystickEvent::CopyObject(wxObject& obj_d) const
 488 {
 489     wxJoystickEvent *obj = (wxJoystickEvent *)&obj_d;
 490     wxEvent::CopyObject(obj_d);
 491
 492     obj->m_pos = m_pos;
 493     obj->m_zPosition = m_zPosition;
 494     obj->m_buttonChange = m_buttonChange;
 495     obj->m_buttonState = m_buttonState;
 496     obj->m_joyStick = m_joyStick;
 497 }
 498
 499 void wxDropFilesEvent::CopyObject(wxObject& obj_d) const
 500 {
 501     wxDropFilesEvent *obj = (wxDropFilesEvent *)&obj_d;
 502     wxEvent::CopyObject(obj_d);
 503
 504     obj->m_noFiles = m_noFiles;
 505     obj->m_pos = m_pos;
 506     // TODO: Problem with obj->m_files. It should be deallocated by the
 507     // destructor of the event.
 508 }
 509
 510 void wxUpdateUIEvent::CopyObject(wxObject &obj_d) const
 511 {
 512     wxUpdateUIEvent *obj = (wxUpdateUIEvent *)&obj_d;
 513     wxEvent::CopyObject(obj_d);
 514
 515     obj->m_checked = m_checked;
 516     obj->m_enabled = m_enabled;
 517     obj->m_text = m_text;
 518     obj->m_setText = m_setText;
 519     obj->m_setChecked = m_setChecked;
 520     obj->m_setEnabled = m_setEnabled;
 521 }
 522
 523 void wxPaletteChangedEvent::CopyObject(wxObject &obj_d) const
 524 {
 525     wxPaletteChangedEvent *obj = (wxPaletteChangedEvent *)&obj_d;
 526     wxEvent::CopyObject(obj_d);
 527
 528     obj->m_changedWindow = m_changedWindow;
 529 }
 530
 531 void wxQueryNewPaletteEvent::CopyObject(wxObject& obj_d) const
 532 {
 533     wxQueryNewPaletteEvent *obj = (wxQueryNewPaletteEvent *)&obj_d;
 534     wxEvent::CopyObject(obj_d);
 535
 536     obj->m_paletteRealized = m_paletteRealized;
 537 }
 538
 539 wxWindowCreateEvent::wxWindowCreateEvent(wxWindow *win)
 540                    : wxEvent()
 541 {
 542     SetEventType(wxEVT_CREATE);
 543     SetEventObject(win);
 544 }
 545
 546 wxWindowDestroyEvent::wxWindowDestroyEvent(wxWindow *win)
 547                     : wxEvent()
 548 {
 549     SetEventType(wxEVT_DESTROY);
 550     SetEventObject(win);
 551 }
 552
 553 #endif // wxUSE_GUI
 554
 555 void wxIdleEvent::CopyObject(wxObject& obj_d) const
 556 {
 557     wxIdleEvent *obj = (wxIdleEvent *)&obj_d;
 558     wxEvent::CopyObject(obj_d);
 559
 560     obj->m_requestMore = m_requestMore;
 561 }
 562
 563 /*
 564  * Event handler
 565  */
 566
 567 wxEvtHandler::wxEvtHandler()
 568 {
 569     m_nextHandler = (wxEvtHandler *) NULL;
 570     m_previousHandler = (wxEvtHandler *) NULL;
 571     m_enabled = TRUE;
 572     m_dynamicEvents = (wxList *) NULL;
 573     m_isWindow = FALSE;
 574     m_pendingEvents = (wxList *) NULL;
 575 #if wxUSE_THREADS
 576 #  if !defined(__VISAGECPP__)
 577     m_eventsLocker = new wxCriticalSection;
 578 #  endif
 579 #endif
 580 }
 581
 582 wxEvtHandler::~wxEvtHandler()
 583 {
 584     // Takes itself out of the list of handlers
 585     if (m_previousHandler)
 586         m_previousHandler->m_nextHandler = m_nextHandler;
 587
 588     if (m_nextHandler)
 589         m_nextHandler->m_previousHandler = m_previousHandler;
 590
 591     if (m_dynamicEvents)
 592     {
 593         wxNode *node = m_dynamicEvents->First();
 594         while (node)
 595         {
 596             wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 597             if (entry->m_callbackUserData) delete entry->m_callbackUserData;
 598             delete entry;
 599             node = node->Next();
 600         }
 601         delete m_dynamicEvents;
 602     };
 603
 604     delete m_pendingEvents;
 605
 606 #if wxUSE_THREADS
 607 #  if !defined(__VISAGECPP__)
 608     delete m_eventsLocker;
 609 #  endif
 610 #endif
 611 }
 612
 613 #if wxUSE_THREADS
 614
 615 bool wxEvtHandler::ProcessThreadEvent(wxEvent& event)
 616 {
 617     // check that we are really in a child thread
 618     wxASSERT_MSG( !wxThread::IsMain(),
 619                   wxT("use ProcessEvent() in main thread") );
 620
 621     AddPendingEvent(event);
 622
 623     return TRUE;
 624 }
 625
 626 #endif // wxUSE_THREADS
 627
 628 void wxEvtHandler::AddPendingEvent(wxEvent& event)
 629 {
 630     // 1) Add event to list of pending events of this event handler
 631
 632 #if defined(__VISAGECPP__)
 633     wxENTER_CRIT_SECT( m_eventsLocker);
 634 #else
 635     wxENTER_CRIT_SECT( *m_eventsLocker);
 636 #endif
 637
 638     if ( !m_pendingEvents )
 639       m_pendingEvents = new wxList;
 640
 641     wxEvent *event2 = (wxEvent *)event.Clone();
 642
 643     m_pendingEvents->Append(event2);
 644
 645 #if defined(__VISAGECPP__)
 646     wxLEAVE_CRIT_SECT( m_eventsLocker);
 647 #else
 648     wxLEAVE_CRIT_SECT( *m_eventsLocker);
 649 #endif
 650
 651     // 2) Add this event handler to list of event handlers that
 652     //    have pending events.
 653
 654     wxENTER_CRIT_SECT(*wxPendingEventsLocker);
 655
 656     if ( !wxPendingEvents )
 657         wxPendingEvents = new wxList;
 658     wxPendingEvents->Append(this);
 659
 660     wxLEAVE_CRIT_SECT(*wxPendingEventsLocker);
 661
 662     // 3) Inform the system that new pending events are somwehere,
 663     //    and that these should be processed in idle time.
 664     wxWakeUpIdle();
 665 }
 666
 667 void wxEvtHandler::ProcessPendingEvents()
 668 {
 669 #if defined(__VISAGECPP__)
 670     wxENTER_CRIT_SECT( m_eventsLocker);
 671 #else
 672     wxENTER_CRIT_SECT( *m_eventsLocker);
 673 #endif
 674
 675     wxNode *node = m_pendingEvents->First();
 676     while ( node )
 677     {
 678         wxEvent *event = (wxEvent *)node->Data();
 679         delete node;
 680
 681         // In ProcessEvent, new events might get added and
 682             // we can safely leave the crtical section here.
 683 #if defined(__VISAGECPP__)
 684         wxLEAVE_CRIT_SECT( m_eventsLocker);
 685 #else
 686         wxLEAVE_CRIT_SECT( *m_eventsLocker);
 687 #endif
 688         ProcessEvent(*event);
 689         delete event;
 690 #if defined(__VISAGECPP__)
 691         wxENTER_CRIT_SECT( m_eventsLocker);
 692 #else
 693         wxENTER_CRIT_SECT( *m_eventsLocker);
 694 #endif
 695
 696         node = m_pendingEvents->First();
 697     }
 698
 699 #if defined(__VISAGECPP__)
 700     wxLEAVE_CRIT_SECT( m_eventsLocker);
 701 #else
 702     wxLEAVE_CRIT_SECT( *m_eventsLocker);
 703 #endif
 704 }
 705
 706 /*
 707  * Event table stuff
 708  */
 709
 710 bool wxEvtHandler::ProcessEvent(wxEvent& event)
 711 {
 712 #if wxUSE_GUI
 713     // check that our flag corresponds to reality
 714     wxASSERT( m_isWindow == IsKindOf(CLASSINFO(wxWindow)) );
 715 #endif // wxUSE_GUI
 716
 717     // An event handler can be enabled or disabled
 718     if ( GetEvtHandlerEnabled() )
 719     {
 720
 721 #if 0
 722 /*
 723         What is this? When using GUI threads, a non main
 724         threads can send an event and process it itself.
 725         This breaks GTK's GUI threads, so please explain.
 726 */
 727
 728         // Check whether we are in a child thread.
 729         if ( !wxThread::IsMain() )
 730           return ProcessThreadEvent(event);
 731 #endif
 732
 733         // Handle per-instance dynamic event tables first
 734         if ( m_dynamicEvents && SearchDynamicEventTable(event) )
 735             return TRUE;
 736
 737         // Then static per-class event tables
 738         const wxEventTable *table = GetEventTable();
 739
 740 #if wxUSE_GUI && wxUSE_VALIDATORS
 741         // Try the associated validator first, if this is a window.
 742         // Problem: if the event handler of the window has been replaced,
 743         // this wxEvtHandler may no longer be a window.
 744         // Therefore validators won't be processed if the handler
 745         // has been replaced with SetEventHandler.
 746         // THIS CAN BE CURED if PushEventHandler is used instead of
 747         // SetEventHandler, and then processing will be passed down the
 748         // chain of event handlers.
 749         if (m_isWindow)
 750         {
 751             wxWindow *win = (wxWindow *)this;
 752
 753             // Can only use the validator of the window which
 754             // is receiving the event
 755             if ( win == event.GetEventObject() )
 756             {
 757                 wxValidator *validator = win->GetValidator();
 758                 if ( validator && validator->ProcessEvent(event) )
 759                 {
 760                     return TRUE;
 761                 }
 762             }
 763         }
 764 #endif
 765
 766         // Search upwards through the inheritance hierarchy
 767         while (table)
 768         {
 769             if ( SearchEventTable((wxEventTable&)*table, event) )
 770                 return TRUE;
 771             table = table->baseTable;
 772         }
 773     }
 774
 775     // Try going down the event handler chain
 776     if ( GetNextHandler() )
 777     {
 778         if ( GetNextHandler()->ProcessEvent(event) )
 779             return TRUE;
 780     }
 781
 782 #if wxUSE_GUI
 783     // Carry on up the parent-child hierarchy,
 784     // but only if event is a command event: it wouldn't
 785     // make sense for a parent to receive a child's size event, for example
 786     if ( m_isWindow && event.IsCommandEvent() )
 787     {
 788         wxWindow *win = (wxWindow *)this;
 789         wxWindow *parent = win->GetParent();
 790         if (parent && !parent->IsBeingDeleted())
 791             return parent->GetEventHandler()->ProcessEvent(event);
 792     }
 793 #endif // wxUSE_GUI
 794
 795     // Last try - application object.
 796     if ( wxTheApp && (this != wxTheApp) )
 797     {
 798         // Special case: don't pass wxEVT_IDLE to wxApp, since it'll always
 799         // swallow it. wxEVT_IDLE is sent explicitly to wxApp so it will be
 800         // processed appropriately via SearchEventTable.
 801         if ( event.GetEventType() != wxEVT_IDLE )
 802         {
 803             if ( wxTheApp->ProcessEvent(event) )
 804                 return TRUE;
 805         }
 806     }
 807
 808     return FALSE;
 809 }
 810
 811 bool wxEvtHandler::SearchEventTable(wxEventTable& table, wxEvent& event)
 812 {
 813     int i = 0;
 814     int commandId = event.GetId();
 815
 816     // BC++ doesn't like while (table.entries[i].m_fn)
 817
 818 #ifdef __SC__
 819     while (table.entries[i].m_fn != 0)
 820 #else
 821     while (table.entries[i].m_fn != 0L)
 822 #endif
 823     {
 824         if ((event.GetEventType() == table.entries[i].m_eventType) &&
 825                 (table.entries[i].m_id == -1 || // Match, if event spec says any id will do (id == -1)
 826                  (table.entries[i].m_lastId == -1 && commandId == table.entries[i].m_id) ||
 827                  (table.entries[i].m_lastId != -1 &&
 828                   (commandId >= table.entries[i].m_id && commandId <= table.entries[i].m_lastId))))
 829         {
 830             event.Skip(FALSE);
 831             event.m_callbackUserData = table.entries[i].m_callbackUserData;
 832
 833             (this->*((wxEventFunction) (table.entries[i].m_fn)))(event);
 834
 835             if ( event.GetSkipped() )
 836                 return FALSE;
 837             else
 838                 return TRUE;
 839         }
 840         i++;
 841     }
 842     return FALSE;
 843 }
 844
 845 void wxEvtHandler::Connect( int id, int lastId,
 846                             wxEventType eventType,
 847                             wxObjectEventFunction func,
 848                             wxObject *userData )
 849 {
 850     wxEventTableEntry *entry = new wxEventTableEntry;
 851     entry->m_id = id;
 852     entry->m_lastId = lastId;
 853     entry->m_eventType = eventType;
 854     entry->m_fn = func;
 855     entry->m_callbackUserData = userData;
 856
 857     if (!m_dynamicEvents)
 858         m_dynamicEvents = new wxList;
 859
 860     m_dynamicEvents->Append( (wxObject*) entry );
 861 }
 862
 863 bool wxEvtHandler::Disconnect( int id, int lastId, wxEventType eventType,
 864                   wxObjectEventFunction func,
 865                   wxObject *userData )
 866 {
 867     if (!m_dynamicEvents)
 868         return FALSE;
 869
 870     wxNode *node = m_dynamicEvents->First();
 871     while (node)
 872     {
 873         wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 874         if ((entry->m_id == id) &&
 875             ((entry->m_lastId == lastId) || (lastId == -1)) &&
 876             ((entry->m_eventType == eventType) || (eventType == wxEVT_NULL)) &&
 877             ((entry->m_fn == func) || (func == (wxObjectEventFunction)NULL)) &&
 878             ((entry->m_callbackUserData == userData) || (userData == (wxObject*)NULL)))
 879         {
 880             if (entry->m_callbackUserData) delete entry->m_callbackUserData;
 881             m_dynamicEvents->DeleteNode( node );
 882             delete entry;
 883             return TRUE;
 884         }
 885         node = node->Next();
 886     }
 887     return FALSE;
 888 }
 889
 890 bool wxEvtHandler::SearchDynamicEventTable( wxEvent& event )
 891 {
 892     wxCHECK_MSG( m_dynamicEvents, FALSE,
 893                  wxT("caller should check that we have dynamic events") );
 894
 895     int commandId = event.GetId();
 896
 897     wxNode *node = m_dynamicEvents->First();
 898     while (node)
 899     {
 900         wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 901
 902         if (entry->m_fn)
 903         {
 904             // Match, if event spec says any id will do (id == -1)
 905             if ( (event.GetEventType() == entry->m_eventType) &&
 906                  (entry->m_id == -1 ||
 907                   (entry->m_lastId == -1 && commandId == entry->m_id) ||
 908                   (entry->m_lastId != -1 &&
 909                   (commandId >= entry->m_id && commandId <= entry->m_lastId))) )
 910             {
 911                 event.Skip(FALSE);
 912                 event.m_callbackUserData = entry->m_callbackUserData;
 913
 914                 (this->*((wxEventFunction) (entry->m_fn)))(event);
 915
 916                 if (event.GetSkipped())
 917                     return FALSE;
 918                 else
 919                     return TRUE;
 920             }
 921         }
 922         node = node->Next();
 923     }
 924     return FALSE;
 925 };
 926
 927 #if WXWIN_COMPATIBILITY
 928 bool wxEvtHandler::OnClose()
 929 {
 930     if (GetNextHandler())
 931         return GetNextHandler()->OnClose();
 932     else
 933         return FALSE;
 934 }
 935 #endif // WXWIN_COMPATIBILITY
 936
 937 #if wxUSE_GUI
 938
 939 // Find a window with the focus, that is also a descendant of the given window.
 940 // This is used to determine the window to initially send commands to.
 941 wxWindow* wxFindFocusDescendant(wxWindow* ancestor)
 942 {
 943     // Process events starting with the window with the focus, if any.
 944     wxWindow* focusWin = wxWindow::FindFocus();
 945     wxWindow* win = focusWin;
 946
 947     // Check if this is a descendant of this frame.
 948     // If not, win will be set to NULL.
 949     while (win)
 950     {
 951         if (win == ancestor)
 952             break;
 953         else
 954             win = win->GetParent();
 955     }
 956     if (win == (wxWindow*) NULL)
 957         focusWin = (wxWindow*) NULL;
 958
 959     return focusWin;
 960 }
 961
 962 #endif // wxUSE_GUI