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 }
 209
 210 /*
 211  * ScrollWin events
 212  */
 213
 214 wxScrollWinEvent::wxScrollWinEvent(wxEventType commandType,
 215                                    int pos,
 216                                    int orient)
 217 {
 218     m_eventType = commandType;
 219     m_extraLong = orient;
 220     m_commandInt = pos;
 221 }
 222
 223 void wxScrollWinEvent::CopyObject(wxObject& obj_d) const
 224 {
 225     wxScrollWinEvent *obj = (wxScrollWinEvent*)&obj_d;
 226
 227     wxEvent::CopyObject(obj_d);
 228
 229     obj->m_extraLong    = m_extraLong;
 230     obj->m_commandInt   = m_commandInt;
 231 }
 232
 233 /*
 234  * Mouse events
 235  *
 236  */
 237
 238 wxMouseEvent::wxMouseEvent(wxEventType commandType)
 239 {
 240     m_eventType = commandType;
 241     m_metaDown = FALSE;
 242     m_altDown = FALSE;
 243     m_controlDown = FALSE;
 244     m_shiftDown = FALSE;
 245     m_leftDown = FALSE;
 246     m_rightDown = FALSE;
 247     m_middleDown = FALSE;
 248     m_x = 0;
 249     m_y = 0;
 250 }
 251
 252 void wxMouseEvent::CopyObject(wxObject& obj_d) const
 253 {
 254     wxMouseEvent *obj = (wxMouseEvent *)&obj_d;
 255
 256     wxEvent::CopyObject(obj_d);
 257
 258     obj->m_metaDown = m_metaDown;
 259     obj->m_altDown = m_altDown;
 260     obj->m_controlDown = m_controlDown;
 261     obj->m_shiftDown = m_shiftDown;
 262     obj->m_leftDown = m_leftDown;
 263     obj->m_rightDown = m_rightDown;
 264     obj->m_middleDown = m_middleDown;
 265     obj->m_x = m_x;
 266     obj->m_y = m_y;
 267 }
 268
 269 // True if was a button dclick event (1 = left, 2 = middle, 3 = right)
 270 // or any button dclick event (but = -1)
 271 bool wxMouseEvent::ButtonDClick(int but) const
 272 {
 273     switch (but)
 274     {
 275         case -1:
 276             return (LeftDClick() || MiddleDClick() || RightDClick());
 277         case 1:
 278             return LeftDClick();
 279         case 2:
 280             return MiddleDClick();
 281         case 3:
 282             return RightDClick();
 283         default:
 284             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDClick"));
 285     }
 286
 287     return FALSE;
 288 }
 289
 290 // True if was a button down event (1 = left, 2 = middle, 3 = right)
 291 // or any button down event (but = -1)
 292 bool wxMouseEvent::ButtonDown(int but) const
 293 {
 294     switch (but)
 295     {
 296         case -1:
 297             return (LeftDown() || MiddleDown() || RightDown());
 298         case 1:
 299             return LeftDown();
 300         case 2:
 301             return MiddleDown();
 302         case 3:
 303             return RightDown();
 304         default:
 305             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDown"));
 306     }
 307
 308     return FALSE;
 309 }
 310
 311 // True if was a button up event (1 = left, 2 = middle, 3 = right)
 312 // or any button up event (but = -1)
 313 bool wxMouseEvent::ButtonUp(int but) const
 314 {
 315     switch (but) {
 316         case -1:
 317             return (LeftUp() || MiddleUp() || RightUp());
 318         case 1:
 319             return LeftUp();
 320         case 2:
 321             return MiddleUp();
 322         case 3:
 323             return RightUp();
 324         default:
 325             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonUp"));
 326     }
 327
 328     return FALSE;
 329 }
 330
 331 // True if the given button is currently changing state
 332 bool wxMouseEvent::Button(int but) const
 333 {
 334     switch (but) {
 335         case -1:
 336             return (ButtonUp(-1) || ButtonDown(-1) || ButtonDClick(-1));
 337         case 1:
 338             return (LeftDown() || LeftUp() || LeftDClick());
 339         case 2:
 340             return (MiddleDown() || MiddleUp() || MiddleDClick());
 341         case 3:
 342             return (RightDown() || RightUp() || RightDClick());
 343         default:
 344             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::Button"));
 345     }
 346
 347     return FALSE;
 348 }
 349
 350 bool wxMouseEvent::ButtonIsDown(int but) const
 351 {
 352     switch (but) {
 353         case -1:
 354             return (LeftIsDown() || MiddleIsDown() || RightIsDown());
 355         case 1:
 356             return LeftIsDown();
 357         case 2:
 358             return MiddleIsDown();
 359         case 3:
 360             return RightIsDown();
 361         default:
 362             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonIsDown"));
 363     }
 364
 365     return FALSE;
 366 }
 367
 368 // Find the logical position of the event given the DC
 369 wxPoint wxMouseEvent::GetLogicalPosition(const wxDC& dc) const
 370 {
 371     wxPoint pt(dc.DeviceToLogicalX(m_x), dc.DeviceToLogicalY(m_y));
 372     return pt;
 373 }
 374
 375
 376 /*
 377  * Keyboard events
 378  *
 379  */
 380
 381 wxKeyEvent::wxKeyEvent(wxEventType type)
 382 {
 383     m_eventType = type;
 384     m_shiftDown = FALSE;
 385     m_controlDown = FALSE;
 386     m_metaDown = FALSE;
 387     m_altDown = FALSE;
 388     m_keyCode = 0;
 389     m_scanCode = 0;
 390 }
 391
 392 void wxKeyEvent::CopyObject(wxObject& obj_d) const
 393 {
 394     wxKeyEvent *obj = (wxKeyEvent *)&obj_d;
 395     wxEvent::CopyObject(obj_d);
 396
 397     obj->m_x = m_x;
 398     obj->m_y = m_y;
 399     obj->m_keyCode = m_keyCode;
 400
 401     obj->m_shiftDown   = m_shiftDown;
 402     obj->m_controlDown = m_controlDown;
 403     obj->m_metaDown    = m_metaDown;
 404     obj->m_altDown     = m_altDown;
 405     obj->m_keyCode     = m_keyCode;
 406 }
 407
 408
 409 /*
 410  * Misc events
 411  */
 412
 413 void wxSizeEvent::CopyObject(wxObject& obj_d) const
 414 {
 415     wxSizeEvent *obj = (wxSizeEvent *)&obj_d;
 416     wxEvent::CopyObject(obj_d);
 417
 418     obj->m_size = m_size;
 419 }
 420
 421 void wxMoveEvent::CopyObject(wxObject& obj_d) const
 422 {
 423     wxMoveEvent *obj = (wxMoveEvent *)&obj_d;
 424     wxEvent::CopyObject(obj_d);
 425
 426     obj->m_pos = m_pos;
 427 }
 428
 429 void wxEraseEvent::CopyObject(wxObject& obj_d) const
 430 {
 431     wxEraseEvent *obj = (wxEraseEvent *)&obj_d;
 432     wxEvent::CopyObject(obj_d);
 433
 434     obj->m_dc = m_dc;
 435 }
 436
 437 void wxActivateEvent::CopyObject(wxObject& obj_d) const
 438 {
 439     wxActivateEvent *obj = (wxActivateEvent *)&obj_d;
 440     wxEvent::CopyObject(obj_d);
 441
 442     obj->m_active = m_active;
 443 }
 444
 445 void wxMenuEvent::CopyObject(wxObject& obj_d) const
 446 {
 447     wxMenuEvent *obj = (wxMenuEvent *)&obj_d;
 448     wxEvent::CopyObject(obj_d);
 449
 450     obj->m_menuId = m_menuId;
 451 }
 452
 453 void wxCloseEvent::CopyObject(wxObject& obj_d) const
 454 {
 455     wxCloseEvent *obj = (wxCloseEvent *)&obj_d;
 456     wxEvent::CopyObject(obj_d);
 457
 458     obj->m_loggingOff = m_loggingOff;
 459     obj->m_veto = m_veto;
 460 #if WXWIN_COMPATIBILITY
 461     obj->m_force = m_force;
 462 #endif
 463     obj->m_canVeto = m_canVeto;
 464 }
 465
 466 void wxShowEvent::CopyObject(wxObject& obj_d) const
 467 {
 468     wxShowEvent *obj = (wxShowEvent *)&obj_d;
 469     wxEvent::CopyObject(obj_d);
 470
 471     obj->m_show = m_show;
 472 }
 473
 474 void wxJoystickEvent::CopyObject(wxObject& obj_d) const
 475 {
 476     wxJoystickEvent *obj = (wxJoystickEvent *)&obj_d;
 477     wxEvent::CopyObject(obj_d);
 478
 479     obj->m_pos = m_pos;
 480     obj->m_zPosition = m_zPosition;
 481     obj->m_buttonChange = m_buttonChange;
 482     obj->m_buttonState = m_buttonState;
 483     obj->m_joyStick = m_joyStick;
 484 }
 485
 486 void wxDropFilesEvent::CopyObject(wxObject& obj_d) const
 487 {
 488     wxDropFilesEvent *obj = (wxDropFilesEvent *)&obj_d;
 489     wxEvent::CopyObject(obj_d);
 490
 491     obj->m_noFiles = m_noFiles;
 492     obj->m_pos = m_pos;
 493     // TODO: Problem with obj->m_files. It should be deallocated by the
 494     // destructor of the event.
 495 }
 496
 497 void wxUpdateUIEvent::CopyObject(wxObject &obj_d) const
 498 {
 499     wxUpdateUIEvent *obj = (wxUpdateUIEvent *)&obj_d;
 500     wxEvent::CopyObject(obj_d);
 501
 502     obj->m_checked = m_checked;
 503     obj->m_enabled = m_enabled;
 504     obj->m_text = m_text;
 505     obj->m_setText = m_setText;
 506     obj->m_setChecked = m_setChecked;
 507     obj->m_setEnabled = m_setEnabled;
 508 }
 509
 510 void wxPaletteChangedEvent::CopyObject(wxObject &obj_d) const
 511 {
 512     wxPaletteChangedEvent *obj = (wxPaletteChangedEvent *)&obj_d;
 513     wxEvent::CopyObject(obj_d);
 514
 515     obj->m_changedWindow = m_changedWindow;
 516 }
 517
 518 void wxQueryNewPaletteEvent::CopyObject(wxObject& obj_d) const
 519 {
 520     wxQueryNewPaletteEvent *obj = (wxQueryNewPaletteEvent *)&obj_d;
 521     wxEvent::CopyObject(obj_d);
 522
 523     obj->m_paletteRealized = m_paletteRealized;
 524 }
 525
 526 wxWindowCreateEvent::wxWindowCreateEvent(wxWindow *win)
 527                    : wxEvent()
 528 {
 529     SetEventType(wxEVT_CREATE);
 530     SetEventObject(win);
 531 }
 532
 533 wxWindowDestroyEvent::wxWindowDestroyEvent(wxWindow *win)
 534                     : wxEvent()
 535 {
 536     SetEventType(wxEVT_DESTROY);
 537     SetEventObject(win);
 538 }
 539
 540 #endif // wxUSE_GUI
 541
 542 void wxIdleEvent::CopyObject(wxObject& obj_d) const
 543 {
 544     wxIdleEvent *obj = (wxIdleEvent *)&obj_d;
 545     wxEvent::CopyObject(obj_d);
 546
 547     obj->m_requestMore = m_requestMore;
 548 }
 549
 550 /*
 551  * Event handler
 552  */
 553
 554 wxEvtHandler::wxEvtHandler()
 555 {
 556     m_nextHandler = (wxEvtHandler *) NULL;
 557     m_previousHandler = (wxEvtHandler *) NULL;
 558     m_enabled = TRUE;
 559     m_dynamicEvents = (wxList *) NULL;
 560     m_isWindow = FALSE;
 561     m_pendingEvents = (wxList *) NULL;
 562 #if wxUSE_THREADS
 563 #  if !defined(__VISAGECPP__)
 564     m_eventsLocker = new wxCriticalSection;
 565 #  endif
 566 #endif
 567 }
 568
 569 wxEvtHandler::~wxEvtHandler()
 570 {
 571     // Takes itself out of the list of handlers
 572     if (m_previousHandler)
 573         m_previousHandler->m_nextHandler = m_nextHandler;
 574
 575     if (m_nextHandler)
 576         m_nextHandler->m_previousHandler = m_previousHandler;
 577
 578     if (m_dynamicEvents)
 579     {
 580         wxNode *node = m_dynamicEvents->First();
 581         while (node)
 582         {
 583             wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 584             if (entry->m_callbackUserData) delete entry->m_callbackUserData;
 585             delete entry;
 586             node = node->Next();
 587         }
 588         delete m_dynamicEvents;
 589     };
 590
 591     delete m_pendingEvents;
 592
 593 #if wxUSE_THREADS
 594 #  if !defined(__VISAGECPP__)
 595     delete m_eventsLocker;
 596 #  endif
 597 #endif
 598 }
 599
 600 #if wxUSE_THREADS
 601
 602 bool wxEvtHandler::ProcessThreadEvent(wxEvent& event)
 603 {
 604     // check that we are really in a child thread
 605     wxASSERT_MSG( !wxThread::IsMain(),
 606                   wxT("use ProcessEvent() in main thread") );
 607
 608     AddPendingEvent(event);
 609
 610     return TRUE;
 611 }
 612
 613 #endif // wxUSE_THREADS
 614
 615 void wxEvtHandler::AddPendingEvent(wxEvent& event)
 616 {
 617     // 1) Add event to list of pending events of this event handler
 618
 619 #if defined(__VISAGECPP__)
 620     wxENTER_CRIT_SECT( m_eventsLocker);
 621 #else
 622     wxENTER_CRIT_SECT( *m_eventsLocker);
 623 #endif
 624
 625     if ( !m_pendingEvents )
 626       m_pendingEvents = new wxList;
 627
 628     wxEvent *event2 = (wxEvent *)event.Clone();
 629
 630     m_pendingEvents->Append(event2);
 631
 632 #if defined(__VISAGECPP__)
 633     wxLEAVE_CRIT_SECT( m_eventsLocker);
 634 #else
 635     wxLEAVE_CRIT_SECT( *m_eventsLocker);
 636 #endif
 637
 638     // 2) Add this event handler to list of event handlers that
 639     //    have pending events.
 640
 641     wxENTER_CRIT_SECT(*wxPendingEventsLocker);
 642
 643     if ( !wxPendingEvents )
 644         wxPendingEvents = new wxList;
 645     wxPendingEvents->Append(this);
 646
 647     wxLEAVE_CRIT_SECT(*wxPendingEventsLocker);
 648
 649     // 3) Inform the system that new pending events are somwehere,
 650     //    and that these should be processed in idle time.
 651     wxWakeUpIdle();
 652 }
 653
 654 void wxEvtHandler::ProcessPendingEvents()
 655 {
 656 #if defined(__VISAGECPP__)
 657     wxENTER_CRIT_SECT( m_eventsLocker);
 658 #else
 659     wxENTER_CRIT_SECT( *m_eventsLocker);
 660 #endif
 661
 662     wxNode *node = m_pendingEvents->First();
 663     while ( node )
 664     {
 665         wxEvent *event = (wxEvent *)node->Data();
 666         delete node;
 667
 668         // In ProcessEvent, new events might get added and
 669             // we can safely leave the crtical section here.
 670 #if defined(__VISAGECPP__)
 671         wxLEAVE_CRIT_SECT( m_eventsLocker);
 672 #else
 673         wxLEAVE_CRIT_SECT( *m_eventsLocker);
 674 #endif
 675         ProcessEvent(*event);
 676         delete event;
 677 #if defined(__VISAGECPP__)
 678         wxENTER_CRIT_SECT( m_eventsLocker);
 679 #else
 680         wxENTER_CRIT_SECT( *m_eventsLocker);
 681 #endif
 682
 683         node = m_pendingEvents->First();
 684     }
 685
 686 #if defined(__VISAGECPP__)
 687     wxLEAVE_CRIT_SECT( m_eventsLocker);
 688 #else
 689     wxLEAVE_CRIT_SECT( *m_eventsLocker);
 690 #endif
 691 }
 692
 693 /*
 694  * Event table stuff
 695  */
 696
 697 bool wxEvtHandler::ProcessEvent(wxEvent& event)
 698 {
 699 #if wxUSE_GUI
 700     // check that our flag corresponds to reality
 701     wxASSERT( m_isWindow == IsKindOf(CLASSINFO(wxWindow)) );
 702 #endif // wxUSE_GUI
 703
 704     // An event handler can be enabled or disabled
 705     if ( GetEvtHandlerEnabled() )
 706     {
 707
 708 #if 0
 709 /*
 710         What is this? When using GUI threads, a non main
 711         threads can send an event and process it itself.
 712         This breaks GTK's GUI threads, so please explain.
 713 */
 714
 715         // Check whether we are in a child thread.
 716         if ( !wxThread::IsMain() )
 717           return ProcessThreadEvent(event);
 718 #endif
 719
 720         // Handle per-instance dynamic event tables first
 721         if ( m_dynamicEvents && SearchDynamicEventTable(event) )
 722             return TRUE;
 723
 724         // Then static per-class event tables
 725         const wxEventTable *table = GetEventTable();
 726
 727 #if wxUSE_GUI && wxUSE_VALIDATORS
 728         // Try the associated validator first, if this is a window.
 729         // Problem: if the event handler of the window has been replaced,
 730         // this wxEvtHandler may no longer be a window.
 731         // Therefore validators won't be processed if the handler
 732         // has been replaced with SetEventHandler.
 733         // THIS CAN BE CURED if PushEventHandler is used instead of
 734         // SetEventHandler, and then processing will be passed down the
 735         // chain of event handlers.
 736         if (m_isWindow)
 737         {
 738             wxWindow *win = (wxWindow *)this;
 739
 740             // Can only use the validator of the window which
 741             // is receiving the event
 742             if ( win == event.GetEventObject() )
 743             {
 744                 wxValidator *validator = win->GetValidator();
 745                 if ( validator && validator->ProcessEvent(event) )
 746                 {
 747                     return TRUE;
 748                 }
 749             }
 750         }
 751 #endif
 752
 753         // Search upwards through the inheritance hierarchy
 754         while (table)
 755         {
 756             if ( SearchEventTable((wxEventTable&)*table, event) )
 757                 return TRUE;
 758             table = table->baseTable;
 759         }
 760     }
 761
 762     // Try going down the event handler chain
 763     if ( GetNextHandler() )
 764     {
 765         if ( GetNextHandler()->ProcessEvent(event) )
 766             return TRUE;
 767     }
 768
 769 #if wxUSE_GUI
 770     // Carry on up the parent-child hierarchy,
 771     // but only if event is a command event: it wouldn't
 772     // make sense for a parent to receive a child's size event, for example
 773     if ( m_isWindow && event.IsCommandEvent() )
 774     {
 775         wxWindow *win = (wxWindow *)this;
 776         wxWindow *parent = win->GetParent();
 777         if (parent && !parent->IsBeingDeleted())
 778             return parent->GetEventHandler()->ProcessEvent(event);
 779     }
 780 #endif // wxUSE_GUI
 781
 782     // Last try - application object.
 783     if ( wxTheApp && (this != wxTheApp) )
 784     {
 785         // Special case: don't pass wxEVT_IDLE to wxApp, since it'll always
 786         // swallow it. wxEVT_IDLE is sent explicitly to wxApp so it will be
 787         // processed appropriately via SearchEventTable.
 788         if ( event.GetEventType() != wxEVT_IDLE )
 789         {
 790             if ( wxTheApp->ProcessEvent(event) )
 791                 return TRUE;
 792         }
 793     }
 794
 795     return FALSE;
 796 }
 797
 798 bool wxEvtHandler::SearchEventTable(wxEventTable& table, wxEvent& event)
 799 {
 800     wxEventType eventType = event.GetEventType();
 801     int eventId = event.GetId();
 802
 803     // BC++ doesn't like testing for m_fn without != 0
 804     for ( int i = 0; table.entries[i].m_fn != 0; i++ )
 805     {
 806         // the line using reference exposes a bug in gcc: although it _seems_
 807         // to work, it leads to weird crashes later on during program
 808         // execution
 809 #ifdef __GNUG__
 810         wxEventTableEntry entry = table.entries[i];
 811 #else
 812         const wxEventTableEntry& entry = table.entries[i];
 813 #endif
 814
 815         // match only if the event type is the same and the id is either -1 in
 816         // the event table (meaning "any") or the event id matches the id
 817         // specified in the event table either exactly or by falling into
 818         // range between first and last
 819         if ( eventType == entry.m_eventType )
 820         {
 821             int tableId1 = entry.m_id,
 822                 tableId2 = entry.m_lastId;
 823
 824             if ( (tableId1 == -1) ||
 825                  (tableId2 == -1 && eventId == tableId1) ||
 826                  (tableId2 != -1 &&
 827                     (eventId >= tableId1 && eventId <= tableId2)) )
 828             {
 829                 event.Skip(FALSE);
 830                 event.m_callbackUserData = entry.m_callbackUserData;
 831
 832                 (this->*((wxEventFunction) (entry.m_fn)))(event);
 833
 834                 return !event.GetSkipped();
 835             }
 836         }
 837     }
 838
 839     return FALSE;
 840 }
 841
 842 void wxEvtHandler::Connect( int id, int lastId,
 843                             wxEventType eventType,
 844                             wxObjectEventFunction func,
 845                             wxObject *userData )
 846 {
 847     wxEventTableEntry *entry = new wxEventTableEntry;
 848     entry->m_id = id;
 849     entry->m_lastId = lastId;
 850     entry->m_eventType = eventType;
 851     entry->m_fn = func;
 852     entry->m_callbackUserData = userData;
 853
 854     if (!m_dynamicEvents)
 855         m_dynamicEvents = new wxList;
 856
 857     m_dynamicEvents->Append( (wxObject*) entry );
 858 }
 859
 860 bool wxEvtHandler::Disconnect( int id, int lastId, wxEventType eventType,
 861                   wxObjectEventFunction func,
 862                   wxObject *userData )
 863 {
 864     if (!m_dynamicEvents)
 865         return FALSE;
 866
 867     wxNode *node = m_dynamicEvents->First();
 868     while (node)
 869     {
 870         wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 871         if ((entry->m_id == id) &&
 872             ((entry->m_lastId == lastId) || (lastId == -1)) &&
 873             ((entry->m_eventType == eventType) || (eventType == wxEVT_NULL)) &&
 874             ((entry->m_fn == func) || (func == (wxObjectEventFunction)NULL)) &&
 875             ((entry->m_callbackUserData == userData) || (userData == (wxObject*)NULL)))
 876         {
 877             if (entry->m_callbackUserData) delete entry->m_callbackUserData;
 878             m_dynamicEvents->DeleteNode( node );
 879             delete entry;
 880             return TRUE;
 881         }
 882         node = node->Next();
 883     }
 884     return FALSE;
 885 }
 886
 887 bool wxEvtHandler::SearchDynamicEventTable( wxEvent& event )
 888 {
 889     wxCHECK_MSG( m_dynamicEvents, FALSE,
 890                  wxT("caller should check that we have dynamic events") );
 891
 892     int commandId = event.GetId();
 893
 894     wxNode *node = m_dynamicEvents->First();
 895     while (node)
 896     {
 897         wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 898
 899         if (entry->m_fn)
 900         {
 901             // Match, if event spec says any id will do (id == -1)
 902             if ( (event.GetEventType() == entry->m_eventType) &&
 903                  (entry->m_id == -1 ||
 904                   (entry->m_lastId == -1 && commandId == entry->m_id) ||
 905                   (entry->m_lastId != -1 &&
 906                   (commandId >= entry->m_id && commandId <= entry->m_lastId))) )
 907             {
 908                 event.Skip(FALSE);
 909                 event.m_callbackUserData = entry->m_callbackUserData;
 910
 911                 (this->*((wxEventFunction) (entry->m_fn)))(event);
 912
 913                 if (event.GetSkipped())
 914                     return FALSE;
 915                 else
 916                     return TRUE;
 917             }
 918         }
 919         node = node->Next();
 920     }
 921     return FALSE;
 922 };
 923
 924 #if WXWIN_COMPATIBILITY
 925 bool wxEvtHandler::OnClose()
 926 {
 927     if (GetNextHandler())
 928         return GetNextHandler()->OnClose();
 929     else
 930         return FALSE;
 931 }
 932 #endif // WXWIN_COMPATIBILITY
 933
 934 #if wxUSE_GUI
 935
 936 // Find a window with the focus, that is also a descendant of the given window.
 937 // This is used to determine the window to initially send commands to.
 938 wxWindow* wxFindFocusDescendant(wxWindow* ancestor)
 939 {
 940     // Process events starting with the window with the focus, if any.
 941     wxWindow* focusWin = wxWindow::FindFocus();
 942     wxWindow* win = focusWin;
 943
 944     // Check if this is a descendant of this frame.
 945     // If not, win will be set to NULL.
 946     while (win)
 947     {
 948         if (win == ancestor)
 949             break;
 950         else
 951             win = win->GetParent();
 952     }
 953     if (win == (wxWindow*) NULL)
 954         focusWin = (wxWindow*) NULL;
 955
 956     return focusWin;
 957 }
 958
 959 #endif // wxUSE_GUI