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