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     IMPLEMENT_DYNAMIC_CLASS(wxHelpEvent, wxCommandEvent)
  86 #endif // wxUSE_GUI
  87
  88 const wxEventTable *wxEvtHandler::GetEventTable() const
  89     { return &wxEvtHandler::sm_eventTable; }
  90
  91 const wxEventTable wxEvtHandler::sm_eventTable =
  92     { (const wxEventTable *)NULL, &wxEvtHandler::sm_eventTableEntries[0] };
  93
  94 const wxEventTableEntry wxEvtHandler::sm_eventTableEntries[] =
  95     { { 0, 0, 0, (wxObjectEventFunction) NULL, (wxObject*) NULL } };
  96
  97
  98 // ----------------------------------------------------------------------------
  99 // global variables
 100 // ----------------------------------------------------------------------------
 101
 102 // To put pending event handlers
 103 wxList *wxPendingEvents = (wxList *)NULL;
 104
 105 #if wxUSE_THREADS
 106     // protects wxPendingEvents list
 107     wxCriticalSection *wxPendingEventsLocker = (wxCriticalSection *)NULL;
 108 #endif
 109
 110 // ============================================================================
 111 // implementation
 112 // ============================================================================
 113
 114 // ----------------------------------------------------------------------------
 115 // wxEvent
 116 // ----------------------------------------------------------------------------
 117
 118 /*
 119  * General wxWindows events, covering
 120  * all interesting things that might happen (button clicking, resizing,
 121  * setting text in widgets, etc.).
 122  *
 123  * For each completely new event type, derive a new event class.
 124  *
 125  */
 126
 127 wxEvent::wxEvent(int theId)
 128 {
 129     m_eventType = wxEVT_NULL;
 130     m_eventObject = (wxObject *) NULL;
 131     m_timeStamp = 0;
 132     m_id = theId;
 133     m_skipped = FALSE;
 134     m_callbackUserData = (wxObject *) NULL;
 135     m_isCommandEvent = FALSE;
 136 }
 137
 138 void wxEvent::CopyObject(wxObject& object_dest) const
 139 {
 140     wxEvent *obj = (wxEvent *)&object_dest;
 141     wxObject::CopyObject(object_dest);
 142
 143     obj->m_eventType = m_eventType;
 144     obj->m_eventObject = m_eventObject;
 145     obj->m_timeStamp = m_timeStamp;
 146     obj->m_id = m_id;
 147     obj->m_skipped = m_skipped;
 148     obj->m_callbackUserData = m_callbackUserData;
 149     obj->m_isCommandEvent = m_isCommandEvent;
 150 }
 151
 152 #if wxUSE_GUI
 153
 154 /*
 155  * Command events
 156  *
 157  */
 158
 159 wxCommandEvent::wxCommandEvent(wxEventType commandType, int theId)
 160 {
 161     m_eventType = commandType;
 162     m_clientData = (char *) NULL;
 163     m_clientObject = (wxClientData *) NULL;
 164     m_extraLong = 0;
 165     m_commandInt = 0;
 166     m_id = theId;
 167     m_commandString = wxEmptyString;
 168     m_isCommandEvent = TRUE;
 169 }
 170
 171 void wxCommandEvent::CopyObject(wxObject& obj_d) const
 172 {
 173     wxCommandEvent *obj = (wxCommandEvent *)&obj_d;
 174
 175     wxEvent::CopyObject(obj_d);
 176
 177     obj->m_clientData    = m_clientData;
 178     obj->m_clientObject  = m_clientObject;
 179     obj->m_extraLong     = m_extraLong;
 180     obj->m_commandInt    = m_commandInt;
 181     obj->m_commandString = m_commandString;
 182 }
 183
 184 /*
 185  * Notify events
 186  */
 187
 188 void wxNotifyEvent::CopyObject(wxObject& obj_d) const
 189 {
 190     wxNotifyEvent *obj = (wxNotifyEvent *)&obj_d;
 191
 192     wxEvent::CopyObject(obj_d);
 193
 194     if (!m_bAllow) obj->Veto();
 195 }
 196
 197 /*
 198  * Scroll events
 199  */
 200
 201 wxScrollEvent::wxScrollEvent(wxEventType commandType,
 202                              int id,
 203                              int pos,
 204                              int orient)
 205              : wxCommandEvent(commandType, id)
 206 {
 207     m_extraLong = orient;
 208     m_commandInt = pos;
 209 }
 210
 211 /*
 212  * ScrollWin events
 213  */
 214
 215 wxScrollWinEvent::wxScrollWinEvent(wxEventType commandType,
 216                                    int pos,
 217                                    int orient)
 218 {
 219     m_eventType = commandType;
 220     m_extraLong = orient;
 221     m_commandInt = pos;
 222 }
 223
 224 void wxScrollWinEvent::CopyObject(wxObject& obj_d) const
 225 {
 226     wxScrollWinEvent *obj = (wxScrollWinEvent*)&obj_d;
 227
 228     wxEvent::CopyObject(obj_d);
 229
 230     obj->m_extraLong    = m_extraLong;
 231     obj->m_commandInt   = m_commandInt;
 232 }
 233
 234 /*
 235  * Mouse events
 236  *
 237  */
 238
 239 wxMouseEvent::wxMouseEvent(wxEventType commandType)
 240 {
 241     m_eventType = commandType;
 242     m_metaDown = FALSE;
 243     m_altDown = FALSE;
 244     m_controlDown = FALSE;
 245     m_shiftDown = FALSE;
 246     m_leftDown = FALSE;
 247     m_rightDown = FALSE;
 248     m_middleDown = FALSE;
 249     m_x = 0;
 250     m_y = 0;
 251 }
 252
 253 void wxMouseEvent::CopyObject(wxObject& obj_d) const
 254 {
 255     wxMouseEvent *obj = (wxMouseEvent *)&obj_d;
 256
 257     wxEvent::CopyObject(obj_d);
 258
 259     obj->m_metaDown = m_metaDown;
 260     obj->m_altDown = m_altDown;
 261     obj->m_controlDown = m_controlDown;
 262     obj->m_shiftDown = m_shiftDown;
 263     obj->m_leftDown = m_leftDown;
 264     obj->m_rightDown = m_rightDown;
 265     obj->m_middleDown = m_middleDown;
 266     obj->m_x = m_x;
 267     obj->m_y = m_y;
 268 }
 269
 270 // True if was a button dclick event (1 = left, 2 = middle, 3 = right)
 271 // or any button dclick event (but = -1)
 272 bool wxMouseEvent::ButtonDClick(int but) const
 273 {
 274     switch (but)
 275     {
 276         case -1:
 277             return (LeftDClick() || MiddleDClick() || RightDClick());
 278         case 1:
 279             return LeftDClick();
 280         case 2:
 281             return MiddleDClick();
 282         case 3:
 283             return RightDClick();
 284         default:
 285             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDClick"));
 286     }
 287
 288     return FALSE;
 289 }
 290
 291 // True if was a button down event (1 = left, 2 = middle, 3 = right)
 292 // or any button down event (but = -1)
 293 bool wxMouseEvent::ButtonDown(int but) const
 294 {
 295     switch (but)
 296     {
 297         case -1:
 298             return (LeftDown() || MiddleDown() || RightDown());
 299         case 1:
 300             return LeftDown();
 301         case 2:
 302             return MiddleDown();
 303         case 3:
 304             return RightDown();
 305         default:
 306             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDown"));
 307     }
 308
 309     return FALSE;
 310 }
 311
 312 // True if was a button up event (1 = left, 2 = middle, 3 = right)
 313 // or any button up event (but = -1)
 314 bool wxMouseEvent::ButtonUp(int but) const
 315 {
 316     switch (but) {
 317         case -1:
 318             return (LeftUp() || MiddleUp() || RightUp());
 319         case 1:
 320             return LeftUp();
 321         case 2:
 322             return MiddleUp();
 323         case 3:
 324             return RightUp();
 325         default:
 326             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonUp"));
 327     }
 328
 329     return FALSE;
 330 }
 331
 332 // True if the given button is currently changing state
 333 bool wxMouseEvent::Button(int but) const
 334 {
 335     switch (but) {
 336         case -1:
 337             return (ButtonUp(-1) || ButtonDown(-1) || ButtonDClick(-1));
 338         case 1:
 339             return (LeftDown() || LeftUp() || LeftDClick());
 340         case 2:
 341             return (MiddleDown() || MiddleUp() || MiddleDClick());
 342         case 3:
 343             return (RightDown() || RightUp() || RightDClick());
 344         default:
 345             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::Button"));
 346     }
 347
 348     return FALSE;
 349 }
 350
 351 bool wxMouseEvent::ButtonIsDown(int but) const
 352 {
 353     switch (but) {
 354         case -1:
 355             return (LeftIsDown() || MiddleIsDown() || RightIsDown());
 356         case 1:
 357             return LeftIsDown();
 358         case 2:
 359             return MiddleIsDown();
 360         case 3:
 361             return RightIsDown();
 362         default:
 363             wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonIsDown"));
 364     }
 365
 366     return FALSE;
 367 }
 368
 369 // Find the logical position of the event given the DC
 370 wxPoint wxMouseEvent::GetLogicalPosition(const wxDC& dc) const
 371 {
 372     wxPoint pt(dc.DeviceToLogicalX(m_x), dc.DeviceToLogicalY(m_y));
 373     return pt;
 374 }
 375
 376
 377 /*
 378  * Keyboard events
 379  *
 380  */
 381
 382 wxKeyEvent::wxKeyEvent(wxEventType type)
 383 {
 384     m_eventType = type;
 385     m_shiftDown = FALSE;
 386     m_controlDown = FALSE;
 387     m_metaDown = FALSE;
 388     m_altDown = FALSE;
 389     m_keyCode = 0;
 390     m_scanCode = 0;
 391 }
 392
 393 void wxKeyEvent::CopyObject(wxObject& obj_d) const
 394 {
 395     wxKeyEvent *obj = (wxKeyEvent *)&obj_d;
 396     wxEvent::CopyObject(obj_d);
 397
 398     obj->m_x = m_x;
 399     obj->m_y = m_y;
 400     obj->m_keyCode = m_keyCode;
 401
 402     obj->m_shiftDown   = m_shiftDown;
 403     obj->m_controlDown = m_controlDown;
 404     obj->m_metaDown    = m_metaDown;
 405     obj->m_altDown     = m_altDown;
 406     obj->m_keyCode     = m_keyCode;
 407 }
 408
 409
 410 /*
 411  * Misc events
 412  */
 413
 414 void wxSizeEvent::CopyObject(wxObject& obj_d) const
 415 {
 416     wxSizeEvent *obj = (wxSizeEvent *)&obj_d;
 417     wxEvent::CopyObject(obj_d);
 418
 419     obj->m_size = m_size;
 420 }
 421
 422 void wxMoveEvent::CopyObject(wxObject& obj_d) const
 423 {
 424     wxMoveEvent *obj = (wxMoveEvent *)&obj_d;
 425     wxEvent::CopyObject(obj_d);
 426
 427     obj->m_pos = m_pos;
 428 }
 429
 430 void wxEraseEvent::CopyObject(wxObject& obj_d) const
 431 {
 432     wxEraseEvent *obj = (wxEraseEvent *)&obj_d;
 433     wxEvent::CopyObject(obj_d);
 434
 435     obj->m_dc = m_dc;
 436 }
 437
 438 void wxActivateEvent::CopyObject(wxObject& obj_d) const
 439 {
 440     wxActivateEvent *obj = (wxActivateEvent *)&obj_d;
 441     wxEvent::CopyObject(obj_d);
 442
 443     obj->m_active = m_active;
 444 }
 445
 446 void wxMenuEvent::CopyObject(wxObject& obj_d) const
 447 {
 448     wxMenuEvent *obj = (wxMenuEvent *)&obj_d;
 449     wxEvent::CopyObject(obj_d);
 450
 451     obj->m_menuId = m_menuId;
 452 }
 453
 454 void wxCloseEvent::CopyObject(wxObject& obj_d) const
 455 {
 456     wxCloseEvent *obj = (wxCloseEvent *)&obj_d;
 457     wxEvent::CopyObject(obj_d);
 458
 459     obj->m_loggingOff = m_loggingOff;
 460     obj->m_veto = m_veto;
 461 #if WXWIN_COMPATIBILITY
 462     obj->m_force = m_force;
 463 #endif
 464     obj->m_canVeto = m_canVeto;
 465 }
 466
 467 void wxShowEvent::CopyObject(wxObject& obj_d) const
 468 {
 469     wxShowEvent *obj = (wxShowEvent *)&obj_d;
 470     wxEvent::CopyObject(obj_d);
 471
 472     obj->m_show = m_show;
 473 }
 474
 475 void wxJoystickEvent::CopyObject(wxObject& obj_d) const
 476 {
 477     wxJoystickEvent *obj = (wxJoystickEvent *)&obj_d;
 478     wxEvent::CopyObject(obj_d);
 479
 480     obj->m_pos = m_pos;
 481     obj->m_zPosition = m_zPosition;
 482     obj->m_buttonChange = m_buttonChange;
 483     obj->m_buttonState = m_buttonState;
 484     obj->m_joyStick = m_joyStick;
 485 }
 486
 487 void wxDropFilesEvent::CopyObject(wxObject& obj_d) const
 488 {
 489     wxDropFilesEvent *obj = (wxDropFilesEvent *)&obj_d;
 490     wxEvent::CopyObject(obj_d);
 491
 492     obj->m_noFiles = m_noFiles;
 493     obj->m_pos = m_pos;
 494     // TODO: Problem with obj->m_files. It should be deallocated by the
 495     // destructor of the event.
 496 }
 497
 498 void wxUpdateUIEvent::CopyObject(wxObject &obj_d) const
 499 {
 500     wxUpdateUIEvent *obj = (wxUpdateUIEvent *)&obj_d;
 501     wxEvent::CopyObject(obj_d);
 502
 503     obj->m_checked = m_checked;
 504     obj->m_enabled = m_enabled;
 505     obj->m_text = m_text;
 506     obj->m_setText = m_setText;
 507     obj->m_setChecked = m_setChecked;
 508     obj->m_setEnabled = m_setEnabled;
 509 }
 510
 511 void wxPaletteChangedEvent::CopyObject(wxObject &obj_d) const
 512 {
 513     wxPaletteChangedEvent *obj = (wxPaletteChangedEvent *)&obj_d;
 514     wxEvent::CopyObject(obj_d);
 515
 516     obj->m_changedWindow = m_changedWindow;
 517 }
 518
 519 void wxQueryNewPaletteEvent::CopyObject(wxObject& obj_d) const
 520 {
 521     wxQueryNewPaletteEvent *obj = (wxQueryNewPaletteEvent *)&obj_d;
 522     wxEvent::CopyObject(obj_d);
 523
 524     obj->m_paletteRealized = m_paletteRealized;
 525 }
 526
 527 wxWindowCreateEvent::wxWindowCreateEvent(wxWindow *win)
 528 {
 529     SetEventType(wxEVT_CREATE);
 530     SetEventObject(win);
 531 }
 532
 533 wxWindowDestroyEvent::wxWindowDestroyEvent(wxWindow *win)
 534 {
 535     SetEventType(wxEVT_DESTROY);
 536     SetEventObject(win);
 537 }
 538
 539 #endif // wxUSE_GUI
 540
 541 void wxIdleEvent::CopyObject(wxObject& obj_d) const
 542 {
 543     wxIdleEvent *obj = (wxIdleEvent *)&obj_d;
 544     wxEvent::CopyObject(obj_d);
 545
 546     obj->m_requestMore = m_requestMore;
 547 }
 548
 549 /*
 550  * Event handler
 551  */
 552
 553 wxEvtHandler::wxEvtHandler()
 554 {
 555     m_nextHandler = (wxEvtHandler *) NULL;
 556     m_previousHandler = (wxEvtHandler *) NULL;
 557     m_enabled = TRUE;
 558     m_dynamicEvents = (wxList *) NULL;
 559     m_isWindow = FALSE;
 560     m_pendingEvents = (wxList *) NULL;
 561 #if wxUSE_THREADS
 562 #  if !defined(__VISAGECPP__)
 563     m_eventsLocker = new wxCriticalSection;
 564 #  endif
 565 #endif
 566 }
 567
 568 wxEvtHandler::~wxEvtHandler()
 569 {
 570     // Takes itself out of the list of handlers
 571     if (m_previousHandler)
 572         m_previousHandler->m_nextHandler = m_nextHandler;
 573
 574     if (m_nextHandler)
 575         m_nextHandler->m_previousHandler = m_previousHandler;
 576
 577     if (m_dynamicEvents)
 578     {
 579         wxNode *node = m_dynamicEvents->First();
 580         while (node)
 581         {
 582             wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 583             if (entry->m_callbackUserData) delete entry->m_callbackUserData;
 584             delete entry;
 585             node = node->Next();
 586         }
 587         delete m_dynamicEvents;
 588     };
 589
 590     delete m_pendingEvents;
 591
 592 #if wxUSE_THREADS
 593 #  if !defined(__VISAGECPP__)
 594     delete m_eventsLocker;
 595 #  endif
 596 #endif
 597 }
 598
 599 #if wxUSE_THREADS
 600
 601 bool wxEvtHandler::ProcessThreadEvent(wxEvent& event)
 602 {
 603     // check that we are really in a child thread
 604     wxASSERT_MSG( !wxThread::IsMain(),
 605                   wxT("use ProcessEvent() in main thread") );
 606
 607     AddPendingEvent(event);
 608
 609     return TRUE;
 610 }
 611
 612 #endif // wxUSE_THREADS
 613
 614 void wxEvtHandler::AddPendingEvent(wxEvent& event)
 615 {
 616     // 1) Add event to list of pending events of this event handler
 617
 618 #if defined(__VISAGECPP__)
 619     wxENTER_CRIT_SECT( m_eventsLocker);
 620 #else
 621     wxENTER_CRIT_SECT( *m_eventsLocker);
 622 #endif
 623
 624     if ( !m_pendingEvents )
 625       m_pendingEvents = new wxList;
 626
 627     wxEvent *event2 = (wxEvent *)event.Clone();
 628
 629     m_pendingEvents->Append(event2);
 630
 631 #if defined(__VISAGECPP__)
 632     wxLEAVE_CRIT_SECT( m_eventsLocker);
 633 #else
 634     wxLEAVE_CRIT_SECT( *m_eventsLocker);
 635 #endif
 636
 637     // 2) Add this event handler to list of event handlers that
 638     //    have pending events.
 639
 640     wxENTER_CRIT_SECT(*wxPendingEventsLocker);
 641
 642     if ( !wxPendingEvents )
 643         wxPendingEvents = new wxList;
 644     wxPendingEvents->Append(this);
 645
 646     wxLEAVE_CRIT_SECT(*wxPendingEventsLocker);
 647
 648     // 3) Inform the system that new pending events are somwehere,
 649     //    and that these should be processed in idle time.
 650     wxWakeUpIdle();
 651 }
 652
 653 void wxEvtHandler::ProcessPendingEvents()
 654 {
 655 #if defined(__VISAGECPP__)
 656     wxENTER_CRIT_SECT( m_eventsLocker);
 657 #else
 658     wxENTER_CRIT_SECT( *m_eventsLocker);
 659 #endif
 660
 661     wxNode *node = m_pendingEvents->First();
 662     while ( node )
 663     {
 664         wxEvent *event = (wxEvent *)node->Data();
 665         delete node;
 666
 667         // In ProcessEvent, new events might get added and
 668             // we can safely leave the crtical section here.
 669 #if defined(__VISAGECPP__)
 670         wxLEAVE_CRIT_SECT( m_eventsLocker);
 671 #else
 672         wxLEAVE_CRIT_SECT( *m_eventsLocker);
 673 #endif
 674         ProcessEvent(*event);
 675         delete event;
 676 #if defined(__VISAGECPP__)
 677         wxENTER_CRIT_SECT( m_eventsLocker);
 678 #else
 679         wxENTER_CRIT_SECT( *m_eventsLocker);
 680 #endif
 681
 682         node = m_pendingEvents->First();
 683     }
 684
 685 #if defined(__VISAGECPP__)
 686     wxLEAVE_CRIT_SECT( m_eventsLocker);
 687 #else
 688     wxLEAVE_CRIT_SECT( *m_eventsLocker);
 689 #endif
 690 }
 691
 692 /*
 693  * Event table stuff
 694  */
 695
 696 bool wxEvtHandler::ProcessEvent(wxEvent& event)
 697 {
 698 #if wxUSE_GUI
 699     // check that our flag corresponds to reality
 700     wxASSERT( m_isWindow == IsKindOf(CLASSINFO(wxWindow)) );
 701 #endif // wxUSE_GUI
 702
 703     // An event handler can be enabled or disabled
 704     if ( GetEvtHandlerEnabled() )
 705     {
 706
 707 #if 0
 708 /*
 709         What is this? When using GUI threads, a non main
 710         threads can send an event and process it itself.
 711         This breaks GTK's GUI threads, so please explain.
 712 */
 713
 714         // Check whether we are in a child thread.
 715         if ( !wxThread::IsMain() )
 716           return ProcessThreadEvent(event);
 717 #endif
 718
 719         // Handle per-instance dynamic event tables first
 720         if ( m_dynamicEvents && SearchDynamicEventTable(event) )
 721             return TRUE;
 722
 723         // Then static per-class event tables
 724         const wxEventTable *table = GetEventTable();
 725
 726 #if wxUSE_GUI && wxUSE_VALIDATORS
 727         // Try the associated validator first, if this is a window.
 728         // Problem: if the event handler of the window has been replaced,
 729         // this wxEvtHandler may no longer be a window.
 730         // Therefore validators won't be processed if the handler
 731         // has been replaced with SetEventHandler.
 732         // THIS CAN BE CURED if PushEventHandler is used instead of
 733         // SetEventHandler, and then processing will be passed down the
 734         // chain of event handlers.
 735         if (m_isWindow)
 736         {
 737             wxWindow *win = (wxWindow *)this;
 738
 739             // Can only use the validator of the window which
 740             // is receiving the event
 741             if ( win == event.GetEventObject() )
 742             {
 743                 wxValidator *validator = win->GetValidator();
 744                 if ( validator && validator->ProcessEvent(event) )
 745                 {
 746                     return TRUE;
 747                 }
 748             }
 749         }
 750 #endif
 751
 752         // Search upwards through the inheritance hierarchy
 753         while (table)
 754         {
 755             if ( SearchEventTable((wxEventTable&)*table, event) )
 756                 return TRUE;
 757             table = table->baseTable;
 758         }
 759     }
 760
 761     // Try going down the event handler chain
 762     if ( GetNextHandler() )
 763     {
 764         if ( GetNextHandler()->ProcessEvent(event) )
 765             return TRUE;
 766     }
 767
 768 #if wxUSE_GUI
 769     // Carry on up the parent-child hierarchy,
 770     // but only if event is a command event: it wouldn't
 771     // make sense for a parent to receive a child's size event, for example
 772     if ( m_isWindow && event.IsCommandEvent() )
 773     {
 774         wxWindow *win = (wxWindow *)this;
 775         wxWindow *parent = win->GetParent();
 776         if (parent && !parent->IsBeingDeleted())
 777             return parent->GetEventHandler()->ProcessEvent(event);
 778     }
 779 #endif // wxUSE_GUI
 780
 781     // Last try - application object.
 782     if ( wxTheApp && (this != wxTheApp) )
 783     {
 784         // Special case: don't pass wxEVT_IDLE to wxApp, since it'll always
 785         // swallow it. wxEVT_IDLE is sent explicitly to wxApp so it will be
 786         // processed appropriately via SearchEventTable.
 787         if ( event.GetEventType() != wxEVT_IDLE )
 788         {
 789             if ( wxTheApp->ProcessEvent(event) )
 790                 return TRUE;
 791         }
 792     }
 793
 794     return FALSE;
 795 }
 796
 797 bool wxEvtHandler::SearchEventTable(wxEventTable& table, wxEvent& event)
 798 {
 799     wxEventType eventType = event.GetEventType();
 800     int eventId = event.GetId();
 801
 802     // BC++ doesn't like testing for m_fn without != 0
 803     for ( int i = 0; table.entries[i].m_fn != 0; i++ )
 804     {
 805         // the line using reference exposes a bug in gcc: although it _seems_
 806         // to work, it leads to weird crashes later on during program
 807         // execution
 808 #ifdef __GNUG__
 809         wxEventTableEntry entry = table.entries[i];
 810 #else
 811         const wxEventTableEntry& entry = table.entries[i];
 812 #endif
 813
 814         // match only if the event type is the same and the id is either -1 in
 815         // the event table (meaning "any") or the event id matches the id
 816         // specified in the event table either exactly or by falling into
 817         // range between first and last
 818         if ( eventType == entry.m_eventType )
 819         {
 820             int tableId1 = entry.m_id,
 821                 tableId2 = entry.m_lastId;
 822
 823             if ( (tableId1 == -1) ||
 824                  (tableId2 == -1 && eventId == tableId1) ||
 825                  (tableId2 != -1 &&
 826                     (eventId >= tableId1 && eventId <= tableId2)) )
 827             {
 828                 event.Skip(FALSE);
 829                 event.m_callbackUserData = entry.m_callbackUserData;
 830
 831                 (this->*((wxEventFunction) (entry.m_fn)))(event);
 832
 833                 return !event.GetSkipped();
 834             }
 835         }
 836     }
 837
 838     return FALSE;
 839 }
 840
 841 void wxEvtHandler::Connect( int id, int lastId,
 842                             wxEventType eventType,
 843                             wxObjectEventFunction func,
 844                             wxObject *userData )
 845 {
 846     wxEventTableEntry *entry = new wxEventTableEntry;
 847     entry->m_id = id;
 848     entry->m_lastId = lastId;
 849     entry->m_eventType = eventType;
 850     entry->m_fn = func;
 851     entry->m_callbackUserData = userData;
 852
 853     if (!m_dynamicEvents)
 854         m_dynamicEvents = new wxList;
 855
 856     m_dynamicEvents->Append( (wxObject*) entry );
 857 }
 858
 859 bool wxEvtHandler::Disconnect( int id, int lastId, wxEventType eventType,
 860                   wxObjectEventFunction func,
 861                   wxObject *userData )
 862 {
 863     if (!m_dynamicEvents)
 864         return FALSE;
 865
 866     wxNode *node = m_dynamicEvents->First();
 867     while (node)
 868     {
 869         wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 870         if ((entry->m_id == id) &&
 871             ((entry->m_lastId == lastId) || (lastId == -1)) &&
 872             ((entry->m_eventType == eventType) || (eventType == wxEVT_NULL)) &&
 873             ((entry->m_fn == func) || (func == (wxObjectEventFunction)NULL)) &&
 874             ((entry->m_callbackUserData == userData) || (userData == (wxObject*)NULL)))
 875         {
 876             if (entry->m_callbackUserData) delete entry->m_callbackUserData;
 877             m_dynamicEvents->DeleteNode( node );
 878             delete entry;
 879             return TRUE;
 880         }
 881         node = node->Next();
 882     }
 883     return FALSE;
 884 }
 885
 886 bool wxEvtHandler::SearchDynamicEventTable( wxEvent& event )
 887 {
 888     wxCHECK_MSG( m_dynamicEvents, FALSE,
 889                  wxT("caller should check that we have dynamic events") );
 890
 891     int commandId = event.GetId();
 892
 893     wxNode *node = m_dynamicEvents->First();
 894     while (node)
 895     {
 896         wxEventTableEntry *entry = (wxEventTableEntry*)node->Data();
 897
 898         if (entry->m_fn)
 899         {
 900             // Match, if event spec says any id will do (id == -1)
 901             if ( (event.GetEventType() == entry->m_eventType) &&
 902                  (entry->m_id == -1 ||
 903                   (entry->m_lastId == -1 && commandId == entry->m_id) ||
 904                   (entry->m_lastId != -1 &&
 905                   (commandId >= entry->m_id && commandId <= entry->m_lastId))) )
 906             {
 907                 event.Skip(FALSE);
 908                 event.m_callbackUserData = entry->m_callbackUserData;
 909
 910                 (this->*((wxEventFunction) (entry->m_fn)))(event);
 911
 912                 if (event.GetSkipped())
 913                     return FALSE;
 914                 else
 915                     return TRUE;
 916             }
 917         }
 918         node = node->Next();
 919     }
 920     return FALSE;
 921 };
 922
 923 #if WXWIN_COMPATIBILITY
 924 bool wxEvtHandler::OnClose()
 925 {
 926     if (GetNextHandler())
 927         return GetNextHandler()->OnClose();
 928     else
 929         return FALSE;
 930 }
 931 #endif // WXWIN_COMPATIBILITY
 932
 933 #if wxUSE_GUI
 934
 935 // Find a window with the focus, that is also a descendant of the given window.
 936 // This is used to determine the window to initially send commands to.
 937 wxWindow* wxFindFocusDescendant(wxWindow* ancestor)
 938 {
 939     // Process events starting with the window with the focus, if any.
 940     wxWindow* focusWin = wxWindow::FindFocus();
 941     wxWindow* win = focusWin;
 942
 943     // Check if this is a descendant of this frame.
 944     // If not, win will be set to NULL.
 945     while (win)
 946     {
 947         if (win == ancestor)
 948             break;
 949         else
 950             win = win->GetParent();
 951     }
 952     if (win == (wxWindow*) NULL)
 953         focusWin = (wxWindow*) NULL;
 954
 955     return focusWin;
 956 }
 957
 958 #endif // wxUSE_GUI