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