text: /////////////////////////////////////////////////////////////////////////////
  // Name:        src/common/event.cpp
  // Purpose:     Event classes
  // Author:      Julian Smart
  // Modified by:
  // Created:     01/02/97
  // Copyright:   (c) Julian Smart
  // Licence:     wxWindows licence
  /////////////////////////////////////////////////////////////////////////////
  
  // ============================================================================
  // declarations
  // ============================================================================
  
  // ----------------------------------------------------------------------------
  // headers
  // ----------------------------------------------------------------------------
  
  // For compilers that support precompilation, includes "wx.h".
  #include "wx/wxprec.h"
  
  #ifdef __BORLANDC__
      #pragma hdrstop
  #endif
  
  #include "wx/event.h"
  #include "wx/eventfilter.h"
  #include "wx/evtloop.h"
  
  #ifndef WX_PRECOMP
      #include "wx/list.h"
      #include "wx/log.h"
      #include "wx/app.h"
      #include "wx/utils.h"
      #include "wx/stopwatch.h"
      #include "wx/module.h"
  
      #if wxUSE_GUI
          #include "wx/window.h"
          #include "wx/control.h"
          #include "wx/dc.h"
          #include "wx/spinbutt.h"
          #include "wx/textentry.h"
          #include "wx/validate.h"
      #endif // wxUSE_GUI
  #endif
  
  #include "wx/thread.h"
  
  #if wxUSE_BASE
      #include "wx/scopedptr.h"
  
      wxDECLARE_SCOPED_PTR(wxEvent, wxEventPtr)
      wxDEFINE_SCOPED_PTR(wxEvent, wxEventPtr)
  #endif // wxUSE_BASE
  
  // ----------------------------------------------------------------------------
  // wxWin macros
  // ----------------------------------------------------------------------------
  
  #if wxUSE_BASE
      wxIMPLEMENT_DYNAMIC_CLASS(wxEvtHandler, wxObject);
      wxIMPLEMENT_ABSTRACT_CLASS(wxEvent, wxObject);
      wxIMPLEMENT_DYNAMIC_CLASS(wxIdleEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxThreadEvent, wxEvent);
  #endif // wxUSE_BASE
  
  #if wxUSE_GUI
      wxIMPLEMENT_DYNAMIC_CLASS(wxCommandEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxNotifyEvent, wxCommandEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxScrollEvent, wxCommandEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxScrollWinEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxMouseEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxKeyEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxSizeEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxPaintEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxNcPaintEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxEraseEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxMoveEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxFocusEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxChildFocusEvent, wxCommandEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxCloseEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxShowEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxMaximizeEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxIconizeEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxMenuEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxJoystickEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxDropFilesEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxActivateEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxInitDialogEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxSetCursorEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxSysColourChangedEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxDisplayChangedEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxDPIChangedEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxUpdateUIEvent, wxCommandEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxNavigationKeyEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxPaletteChangedEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxQueryNewPaletteEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxWindowCreateEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxWindowDestroyEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxHelpEvent, wxCommandEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxContextMenuEvent, wxCommandEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxMouseCaptureChangedEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxMouseCaptureLostEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxClipboardTextEvent, wxCommandEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxGestureEvent, wxEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxPanGestureEvent, wxGestureEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxZoomGestureEvent, wxGestureEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxRotateGestureEvent, wxGestureEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxTwoFingerTapEvent, wxGestureEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxLongPressEvent, wxGestureEvent);
      wxIMPLEMENT_DYNAMIC_CLASS(wxPressAndTapEvent, wxGestureEvent);
  #endif // wxUSE_GUI
  
  #if wxUSE_BASE
  
  const wxEventTable *wxEvtHandler::GetEventTable() const
      { return &wxEvtHandler::sm_eventTable; }
  
  const wxEventTable wxEvtHandler::sm_eventTable =
      { (const wxEventTable *)NULL, &wxEvtHandler::sm_eventTableEntries[0] };
  
  wxEventHashTable &wxEvtHandler::GetEventHashTable() const
      { return wxEvtHandler::sm_eventHashTable; }
  
  wxEventHashTable wxEvtHandler::sm_eventHashTable(wxEvtHandler::sm_eventTable);
  
  const wxEventTableEntry wxEvtHandler::sm_eventTableEntries[] =
      { wxDECLARE_EVENT_TABLE_TERMINATOR() };
  
  
  // wxUSE_MEMORY_TRACING considers memory freed from the static objects dtors
  // leaked, so we need to manually clean up all event tables before checking for
  // the memory leaks when using it, however this breaks re-initializing the
  // library (i.e. repeated calls to wxInitialize/wxUninitialize) because the
  // event tables won't be rebuilt the next time, so disable this by default
  #if wxUSE_MEMORY_TRACING
  
  class wxEventTableEntryModule: public wxModule
  {
  public:
      wxEventTableEntryModule() { }
      virtual bool OnInit() wxOVERRIDE { return true; }
      virtual void OnExit() wxOVERRIDE { wxEventHashTable::ClearAll(); }
  
      wxDECLARE_DYNAMIC_CLASS(wxEventTableEntryModule);
  };
  
  wxIMPLEMENT_DYNAMIC_CLASS(wxEventTableEntryModule, wxModule);
  
  #endif // wxUSE_MEMORY_TRACING
  
  // ----------------------------------------------------------------------------
  // global variables
  // ----------------------------------------------------------------------------
  
  // common event types are defined here, other event types are defined by the
  // components which use them
  
  const wxEventType wxEVT_FIRST = 10000;
  const wxEventType wxEVT_USER_FIRST = wxEVT_FIRST + 2000;
  const wxEventType wxEVT_NULL = wxNewEventType();
  
  wxDEFINE_EVENT( wxEVT_IDLE, wxIdleEvent );
  
  // Thread and asynchronous call events
  wxDEFINE_EVENT( wxEVT_THREAD, wxThreadEvent );
  wxDEFINE_EVENT( wxEVT_ASYNC_METHOD_CALL, wxAsyncMethodCallEvent );
  
  #endif // wxUSE_BASE
  
  #if wxUSE_GUI
  
  wxDEFINE_EVENT( wxEVT_BUTTON, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_CHECKBOX, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_CHOICE, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_LISTBOX, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_LISTBOX_DCLICK, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_CHECKLISTBOX, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_MENU, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_SLIDER, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_RADIOBOX, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_RADIOBUTTON, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_SCROLLBAR, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_VLBOX, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_COMBOBOX, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_TOOL_RCLICKED, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_TOOL_ENTER, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_TOOL_DROPDOWN, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_COMBOBOX_DROPDOWN, wxCommandEvent);
  wxDEFINE_EVENT( wxEVT_COMBOBOX_CLOSEUP, wxCommandEvent);
  
  // Mouse event types
  wxDEFINE_EVENT( wxEVT_LEFT_DOWN, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_LEFT_UP, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_MIDDLE_DOWN, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_MIDDLE_UP, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_RIGHT_DOWN, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_RIGHT_UP, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_MOTION, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_ENTER_WINDOW, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_LEAVE_WINDOW, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_LEFT_DCLICK, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_MIDDLE_DCLICK, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_RIGHT_DCLICK, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_SET_FOCUS, wxFocusEvent );
  wxDEFINE_EVENT( wxEVT_KILL_FOCUS, wxFocusEvent );
  wxDEFINE_EVENT( wxEVT_CHILD_FOCUS, wxChildFocusEvent );
  wxDEFINE_EVENT( wxEVT_MOUSEWHEEL, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_AUX1_DOWN, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_AUX1_UP, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_AUX1_DCLICK, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_AUX2_DOWN, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_AUX2_UP, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_AUX2_DCLICK, wxMouseEvent );
  wxDEFINE_EVENT( wxEVT_MAGNIFY, wxMouseEvent );
  
  // Character input event type
  wxDEFINE_EVENT( wxEVT_CHAR, wxKeyEvent );
  wxDEFINE_EVENT( wxEVT_AFTER_CHAR, wxKeyEvent );
  wxDEFINE_EVENT( wxEVT_CHAR_HOOK, wxKeyEvent );
  wxDEFINE_EVENT( wxEVT_NAVIGATION_KEY, wxNavigationKeyEvent );
  wxDEFINE_EVENT( wxEVT_KEY_DOWN, wxKeyEvent );
  wxDEFINE_EVENT( wxEVT_KEY_UP, wxKeyEvent );
  #if wxUSE_HOTKEY
  wxDEFINE_EVENT( wxEVT_HOTKEY, wxKeyEvent );
  #endif
  
  // Set cursor event
  wxDEFINE_EVENT( wxEVT_SET_CURSOR, wxSetCursorEvent );
  
  // wxScrollbar and wxSlider event identifiers
  wxDEFINE_EVENT( wxEVT_SCROLL_TOP, wxScrollEvent );
  wxDEFINE_EVENT( wxEVT_SCROLL_BOTTOM, wxScrollEvent );
  wxDEFINE_EVENT( wxEVT_SCROLL_LINEUP, wxScrollEvent );
  wxDEFINE_EVENT( wxEVT_SCROLL_LINEDOWN, wxScrollEvent );
  wxDEFINE_EVENT( wxEVT_SCROLL_PAGEUP, wxScrollEvent );
  wxDEFINE_EVENT( wxEVT_SCROLL_PAGEDOWN, wxScrollEvent );
  wxDEFINE_EVENT( wxEVT_SCROLL_THUMBTRACK, wxScrollEvent );
  wxDEFINE_EVENT( wxEVT_SCROLL_THUMBRELEASE, wxScrollEvent );
  wxDEFINE_EVENT( wxEVT_SCROLL_CHANGED, wxScrollEvent );
  
  // Due to a bug in older wx versions, wxSpinEvents were being sent with type of
  // wxEVT_SCROLL_LINEUP, wxEVT_SCROLL_LINEDOWN and wxEVT_SCROLL_THUMBTRACK. But
  // with the type-safe events in place, these event types are associated with
  // wxScrollEvent. To allow handling of spin events, new event types have been
  // defined in spinbutt.h/spinnbuttcmn.cpp. To maintain backward compatibility
  // the spin event types are being initialized with the scroll event types.
  
  #if wxUSE_SPINBTN
  
  wxDEFINE_EVENT_ALIAS( wxEVT_SPIN_UP,   wxSpinEvent, wxEVT_SCROLL_LINEUP );
  wxDEFINE_EVENT_ALIAS( wxEVT_SPIN_DOWN, wxSpinEvent, wxEVT_SCROLL_LINEDOWN );
  wxDEFINE_EVENT_ALIAS( wxEVT_SPIN,      wxSpinEvent, wxEVT_SCROLL_THUMBTRACK );
  
  #endif // wxUSE_SPINBTN
  
  // Scroll events from wxWindow
  wxDEFINE_EVENT( wxEVT_SCROLLWIN_TOP, wxScrollWinEvent );
  wxDEFINE_EVENT( wxEVT_SCROLLWIN_BOTTOM, wxScrollWinEvent );
  wxDEFINE_EVENT( wxEVT_SCROLLWIN_LINEUP, wxScrollWinEvent );
  wxDEFINE_EVENT( wxEVT_SCROLLWIN_LINEDOWN, wxScrollWinEvent );
  wxDEFINE_EVENT( wxEVT_SCROLLWIN_PAGEUP, wxScrollWinEvent );
  wxDEFINE_EVENT( wxEVT_SCROLLWIN_PAGEDOWN, wxScrollWinEvent );
  wxDEFINE_EVENT( wxEVT_SCROLLWIN_THUMBTRACK, wxScrollWinEvent );
  wxDEFINE_EVENT( wxEVT_SCROLLWIN_THUMBRELEASE, wxScrollWinEvent );
  
  // Gesture events
  wxDEFINE_EVENT( wxEVT_GESTURE_PAN, wxPanGestureEvent );
  wxDEFINE_EVENT( wxEVT_GESTURE_ZOOM, wxZoomGestureEvent );
  wxDEFINE_EVENT( wxEVT_GESTURE_ROTATE, wxRotateGestureEvent );
  wxDEFINE_EVENT( wxEVT_TWO_FINGER_TAP, wxTwoFingerTapEvent );
  wxDEFINE_EVENT( wxEVT_LONG_PRESS, wxLongPressEvent );
  wxDEFINE_EVENT( wxEVT_PRESS_AND_TAP, wxPressAndTapEvent );
  
  // System events
  wxDEFINE_EVENT( wxEVT_SIZE, wxSizeEvent );
  wxDEFINE_EVENT( wxEVT_SIZING, wxSizeEvent );
  wxDEFINE_EVENT( wxEVT_MOVE, wxMoveEvent );
  wxDEFINE_EVENT( wxEVT_MOVING, wxMoveEvent );
  wxDEFINE_EVENT( wxEVT_MOVE_START, wxMoveEvent );
  wxDEFINE_EVENT( wxEVT_MOVE_END, wxMoveEvent );
  wxDEFINE_EVENT( wxEVT_CLOSE_WINDOW, wxCloseEvent );
  wxDEFINE_EVENT( wxEVT_END_SESSION, wxCloseEvent );
  wxDEFINE_EVENT( wxEVT_QUERY_END_SESSION, wxCloseEvent );
  wxDEFINE_EVENT( wxEVT_HIBERNATE, wxActivateEvent );
  wxDEFINE_EVENT( wxEVT_ACTIVATE_APP, wxActivateEvent );
  wxDEFINE_EVENT( wxEVT_ACTIVATE, wxActivateEvent );
  wxDEFINE_EVENT( wxEVT_CREATE, wxWindowCreateEvent );
  wxDEFINE_EVENT( wxEVT_DESTROY, wxWindowDestroyEvent );
  wxDEFINE_EVENT( wxEVT_SHOW, wxShowEvent );
  wxDEFINE_EVENT( wxEVT_ICONIZE, wxIconizeEvent );
  wxDEFINE_EVENT( wxEVT_MAXIMIZE, wxMaximizeEvent );
  wxDEFINE_EVENT( wxEVT_MOUSE_CAPTURE_CHANGED, wxMouseCaptureChangedEvent );
  wxDEFINE_EVENT( wxEVT_MOUSE_CAPTURE_LOST, wxMouseCaptureLostEvent );
  wxDEFINE_EVENT( wxEVT_PAINT, wxPaintEvent );
  wxDEFINE_EVENT( wxEVT_ERASE_BACKGROUND, wxEraseEvent );
  wxDEFINE_EVENT( wxEVT_NC_PAINT, wxNcPaintEvent );
  wxDEFINE_EVENT( wxEVT_MENU_OPEN, wxMenuEvent );
  wxDEFINE_EVENT( wxEVT_MENU_CLOSE, wxMenuEvent );
  wxDEFINE_EVENT( wxEVT_MENU_HIGHLIGHT, wxMenuEvent );
  wxDEFINE_EVENT( wxEVT_CONTEXT_MENU, wxContextMenuEvent );
  wxDEFINE_EVENT( wxEVT_SYS_COLOUR_CHANGED, wxSysColourChangedEvent );
  wxDEFINE_EVENT( wxEVT_DISPLAY_CHANGED, wxDisplayChangedEvent );
  wxDEFINE_EVENT( wxEVT_DPI_CHANGED, wxDPIChangedEvent );
  wxDEFINE_EVENT( wxEVT_QUERY_NEW_PALETTE, wxQueryNewPaletteEvent );
  wxDEFINE_EVENT( wxEVT_PALETTE_CHANGED, wxPaletteChangedEvent );
  wxDEFINE_EVENT( wxEVT_JOY_BUTTON_DOWN, wxJoystickEvent );
  wxDEFINE_EVENT( wxEVT_JOY_BUTTON_UP, wxJoystickEvent );
  wxDEFINE_EVENT( wxEVT_JOY_MOVE, wxJoystickEvent );
  wxDEFINE_EVENT( wxEVT_JOY_ZMOVE, wxJoystickEvent );
  wxDEFINE_EVENT( wxEVT_DROP_FILES, wxDropFilesEvent );
  wxDEFINE_EVENT( wxEVT_INIT_DIALOG, wxInitDialogEvent );
  wxDEFINE_EVENT( wxEVT_UPDATE_UI, wxUpdateUIEvent );
  
  // Clipboard events
  wxDEFINE_EVENT( wxEVT_TEXT_COPY, wxClipboardTextEvent );
  wxDEFINE_EVENT( wxEVT_TEXT_CUT, wxClipboardTextEvent );
  wxDEFINE_EVENT( wxEVT_TEXT_PASTE, wxClipboardTextEvent );
  
  // Generic command events
  // Note: a click is a higher-level event than button down/up
  wxDEFINE_EVENT( wxEVT_COMMAND_LEFT_CLICK, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_COMMAND_LEFT_DCLICK, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_COMMAND_RIGHT_CLICK, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_COMMAND_RIGHT_DCLICK, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_COMMAND_SET_FOCUS, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_COMMAND_KILL_FOCUS, wxCommandEvent );
  wxDEFINE_EVENT( wxEVT_COMMAND_ENTER, wxCommandEvent );
  
  // Help events
  wxDEFINE_EVENT( wxEVT_HELP, wxHelpEvent );
  wxDEFINE_EVENT( wxEVT_DETAILED_HELP, wxHelpEvent );
  
  #endif // wxUSE_GUI
  
  #if wxUSE_BASE
  
  wxIdleMode wxIdleEvent::sm_idleMode = wxIDLE_PROCESS_ALL;
  
  // ============================================================================
  // implementation
  // ============================================================================
  
  // ----------------------------------------------------------------------------
  // event initialization
  // ----------------------------------------------------------------------------
  
  int wxNewEventType()
  {
      // MT-FIXME
      static int s_lastUsedEventType = wxEVT_FIRST;
  
      return s_lastUsedEventType++;
  }
  // ----------------------------------------------------------------------------
  // wxEventFunctor
  // ----------------------------------------------------------------------------
  
  wxEventFunctor::~wxEventFunctor()
  {
  }
  
  // ----------------------------------------------------------------------------
  // wxEvent
  // ----------------------------------------------------------------------------
  
  /*
   * General wxWidgets events, covering all interesting things that might happen
   * (button clicking, resizing, setting text in widgets, etc.).
   *
   * For each completely new event type, derive a new event class.
   *
   */
  
  wxEvent::wxEvent(int theId, wxEventType commandType)
      : m_eventType(commandType)
  {
      m_eventObject = NULL;
      m_timeStamp = 0;
      m_id = theId;
      m_skipped = false;
      m_callbackUserData = NULL;
      m_handlerToProcessOnlyIn = NULL;
      m_isCommandEvent = false;
      m_propagationLevel = wxEVENT_PROPAGATE_NONE;
      m_propagatedFrom = NULL;
      m_wasProcessed = false;
      m_willBeProcessedAgain = false;
  }
  
  wxEvent::wxEvent(const wxEvent& src)
      : wxObject(src)
      , m_eventObject(src.m_eventObject)
      , m_eventType(src.m_eventType)
      , m_timeStamp(src.m_timeStamp)
      , m_id(src.m_id)
      , m_callbackUserData(src.m_callbackUserData)
      , m_handlerToProcessOnlyIn(NULL)
      , m_propagationLevel(src.m_propagationLevel)
      , m_propagatedFrom(NULL)
      , m_skipped(src.m_skipped)
      , m_isCommandEvent(src.m_isCommandEvent)
      , m_wasProcessed(false)
      , m_willBeProcessedAgain(false)
  {
  }
  
  wxEvent& wxEvent::operator=(const wxEvent& src)
  {
      wxObject::operator=(src);
  
      m_eventObject = src.m_eventObject;
      m_eventType = src.m_eventType;
      m_timeStamp = src.m_timeStamp;
      m_id = src.m_id;
      m_callbackUserData = src.m_callbackUserData;
      m_handlerToProcessOnlyIn = NULL;
      m_propagationLevel = src.m_propagationLevel;
      m_propagatedFrom = NULL;
      m_skipped = src.m_skipped;
      m_isCommandEvent = src.m_isCommandEvent;
  
      // don't change m_wasProcessed
  
      // While the original again could be passed to another handler, this one
      // isn't going to be processed anywhere else by default.
      m_willBeProcessedAgain = false;
  
      return *this;
  }
  
  #endif // wxUSE_BASE
  
  #if wxUSE_GUI
  
  // ----------------------------------------------------------------------------
  // wxCommandEvent
  // ----------------------------------------------------------------------------
  
  wxString wxCommandEvent::GetString() const
  {
      // This is part of the hack retrieving the event string from the control
      // itself only when/if it's really needed to avoid copying potentially huge
      // strings coming from multiline text controls.
      if (m_eventType == wxEVT_TEXT && m_eventObject)
      {
          // Only windows generate wxEVT_TEXT events, so this cast should really
          // succeed, but err on the side of caution just in case somebody
          // created a bogus event of this type.
          if ( wxWindow* const w = wxDynamicCast(m_eventObject, wxWindow) )
          {
              if ( const wxTextEntry* const entry = w->WXGetTextEntry() )
                  return entry->GetValue();
          }
      }
  
      return m_cmdString;
  }
  
  // ----------------------------------------------------------------------------
  // wxPaintEvent and wxNcPaintEvent
  // ----------------------------------------------------------------------------
  
  wxPaintEvent::wxPaintEvent(wxWindowBase* window)
      : wxEvent(window ? window->GetId() : 0, wxEVT_PAINT)
  {
      SetEventObject(window);
  }
  
  wxNcPaintEvent::wxNcPaintEvent(wxWindowBase* window)
      : wxEvent(window ? window->GetId() : 0, wxEVT_NC_PAINT)
  {
      SetEventObject(window);
  }
  
  // ----------------------------------------------------------------------------
  // wxUpdateUIEvent
  // ----------------------------------------------------------------------------
  
  #if wxUSE_LONGLONG
  wxLongLong wxUpdateUIEvent::sm_lastUpdate = 0;
  #endif
  
  long wxUpdateUIEvent::sm_updateInterval = 0;
  
  wxUpdateUIMode wxUpdateUIEvent::sm_updateMode = wxUPDATE_UI_PROCESS_ALL;
  
  // Can we update?
  bool wxUpdateUIEvent::CanUpdate(wxWindowBase *win)
  {
      // Don't update if we've switched global updating off
      // and this window doesn't support updates.
      if (win &&
         (GetMode() == wxUPDATE_UI_PROCESS_SPECIFIED &&
         ((win->GetExtraStyle() & wxWS_EX_PROCESS_UI_UPDATES) == 0)))
          return false;
  
      // Don't update children of the hidden windows: this is useless as any
      // change to their state won't be seen by the user anyhow. Notice that this
      // argument doesn't apply to the hidden windows (with visible parent)
      // themselves as they could be shown by their EVT_UPDATE_UI handler.
      if ( win->GetParent() && !win->GetParent()->IsShownOnScreen() )
          return false;
  
      if (sm_updateInterval == -1)
          return false;
  
      if (sm_updateInterval == 0)
          return true;
  
  #if wxUSE_STOPWATCH && wxUSE_LONGLONG
      wxLongLong now = wxGetLocalTimeMillis();
      if (now > (sm_lastUpdate + sm_updateInterval))
      {
          return true;
      }
  
      return false;
  #else
      // If we don't have wxStopWatch or wxLongLong, we
      // should err on the safe side and update now anyway.
      return true;
  #endif
  }
  
  // Reset the update time to provide a delay until the next
  // time we should update
  void wxUpdateUIEvent::ResetUpdateTime()
  {
  #if wxUSE_STOPWATCH && wxUSE_LONGLONG
      if (sm_updateInterval > 0)
      {
          wxLongLong now = wxGetLocalTimeMillis();
          if (now > (sm_lastUpdate + sm_updateInterval))
          {
              sm_lastUpdate = now;
          }
      }
  #endif
  }
  
  // ----------------------------------------------------------------------------
  // wxScrollEvent
  // ----------------------------------------------------------------------------
  
  wxScrollEvent::wxScrollEvent(wxEventType commandType,
                               int id,
                               int pos,
                               int orient)
      : wxCommandEvent(commandType, id)
  {
      m_extraLong = orient;
      m_commandInt = pos;
  }
  
  // ----------------------------------------------------------------------------
  // wxScrollWinEvent
  // ----------------------------------------------------------------------------
  
  wxScrollWinEvent::wxScrollWinEvent(wxEventType commandType,
                                     int pos,
                                     int orient)
  {
      m_eventType = commandType;
      m_extraLong = orient;
      m_commandInt = pos;
  }
  
  // ----------------------------------------------------------------------------
  // wxMouseEvent
  // ----------------------------------------------------------------------------
  
  wxMouseEvent::wxMouseEvent(wxEventType commandType)
  {
      m_eventType = commandType;
  
      m_x = 0;
      m_y = 0;
  
      m_leftDown = false;
      m_middleDown = false;
      m_rightDown = false;
      m_aux1Down = false;
      m_aux2Down = false;
  
      m_clickCount = -1;
  
      m_wheelAxis = wxMOUSE_WHEEL_VERTICAL;
      m_wheelRotation = 0;
      m_wheelDelta = 0;
      m_wheelInverted = false;
      m_linesPerAction = 0;
      m_columnsPerAction = 0;
      m_magnification = 0.0f;
  }
  
  void wxMouseEvent::Assign(const wxMouseEvent& event)
  {
      wxEvent::operator=(event);
  
      // Borland C++ 5.82 doesn't compile an explicit call to an implicitly
      // defined operator=() so need to do it this way:
      *static_cast<wxMouseState *>(this) = event;
  
      m_x = event.m_x;
      m_y = event.m_y;
  
      m_leftDown = event.m_leftDown;
      m_middleDown = event.m_middleDown;
      m_rightDown = event.m_rightDown;
      m_aux1Down = event.m_aux1Down;
      m_aux2Down = event.m_aux2Down;
  
      m_wheelRotation = event.m_wheelRotation;
      m_wheelDelta = event.m_wheelDelta;
      m_wheelInverted = event.m_wheelInverted;
      m_linesPerAction = event.m_linesPerAction;
      m_columnsPerAction = event.m_columnsPerAction;
      m_wheelAxis = event.m_wheelAxis;
  
      m_magnification = event.m_magnification;
  }
  
  // return true if was a button dclick event
  bool wxMouseEvent::ButtonDClick(int but) const
  {
      switch (but)
      {
          default:
              wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDClick"));
              wxFALLTHROUGH;
  
          case wxMOUSE_BTN_ANY:
              return (LeftDClick() || MiddleDClick() || RightDClick() ||
                      Aux1DClick() || Aux2DClick());
  
          case wxMOUSE_BTN_LEFT:
              return LeftDClick();
  
          case wxMOUSE_BTN_MIDDLE:
              return MiddleDClick();
  
          case wxMOUSE_BTN_RIGHT:
              return RightDClick();
  
          case wxMOUSE_BTN_AUX1:
              return Aux1DClick();
  
          case wxMOUSE_BTN_AUX2:
              return Aux2DClick();
      }
  }
  
  // return true if was a button down event
  bool wxMouseEvent::ButtonDown(int but) const
  {
      switch (but)
      {
          default:
              wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonDown"));
              wxFALLTHROUGH;
  
          case wxMOUSE_BTN_ANY:
              return (LeftDown() || MiddleDown() || RightDown() ||
                      Aux1Down() || Aux2Down());
  
          case wxMOUSE_BTN_LEFT:
              return LeftDown();
  
          case wxMOUSE_BTN_MIDDLE:
              return MiddleDown();
  
          case wxMOUSE_BTN_RIGHT:
              return RightDown();
  
          case wxMOUSE_BTN_AUX1:
              return Aux1Down();
  
          case wxMOUSE_BTN_AUX2:
              return Aux2Down();
      }
  }
  
  // return true if was a button up event
  bool wxMouseEvent::ButtonUp(int but) const
  {
      switch (but)
      {
          default:
              wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::ButtonUp"));
              wxFALLTHROUGH;
  
          case wxMOUSE_BTN_ANY:
              return (LeftUp() || MiddleUp() || RightUp() ||
                      Aux1Up() || Aux2Up());
  
          case wxMOUSE_BTN_LEFT:
              return LeftUp();
  
          case wxMOUSE_BTN_MIDDLE:
              return MiddleUp();
  
          case wxMOUSE_BTN_RIGHT:
              return RightUp();
  
          case wxMOUSE_BTN_AUX1:
              return Aux1Up();
  
          case wxMOUSE_BTN_AUX2:
              return Aux2Up();
      }
  }
  
  // return true if the given button is currently changing state
  bool wxMouseEvent::Button(int but) const
  {
      switch (but)
      {
          default:
              wxFAIL_MSG(wxT("invalid parameter in wxMouseEvent::Button"));
              wxFALLTHROUGH;
  
          case wxMOUSE_BTN_ANY:
              return ButtonUp(wxMOUSE_BTN_ANY) ||
                      ButtonDown(wxMOUSE_BTN_ANY) ||
                          ButtonDClick(wxMOUSE_BTN_ANY);
  
          case wxMOUSE_BTN_LEFT:
              return LeftDown() || LeftUp() || LeftDClick();
  
          case wxMOUSE_BTN_MIDDLE:
              return MiddleDown() || MiddleUp() || MiddleDClick();
  
          case wxMOUSE_BTN_RIGHT:
              return RightDown() || RightUp() || RightDClick();
  
          case wxMOUSE_BTN_AUX1:
             return Aux1Down() || Aux1Up() || Aux1DClick();
  
          case wxMOUSE_BTN_AUX2:
             return Aux2Down() || Aux2Up() || Aux2DClick();
      }
  }
  
  int wxMouseEvent::GetButton() const
  {
      for ( int i = 1; i < wxMOUSE_BTN_MAX; i++ )
      {
          if ( Button(i) )
          {
              return i;
          }
      }
  
      return wxMOUSE_BTN_NONE;
  }
  
  // Find the logical position of the event given the DC
  wxPoint wxMouseEvent::GetLogicalPosition(const wxDC& dc) const
  {
      wxPoint pt(dc.DeviceToLogicalX(m_x), dc.DeviceToLogicalY(m_y));
      return pt;
  }
  
  // ----------------------------------------------------------------------------
  // wxKeyEvent
  // ----------------------------------------------------------------------------
  
  wxKeyEvent::wxKeyEvent(wxEventType type)
  #if wxUSE_UNICODE
      : m_uniChar(WXK_NONE)
  #endif
  {
      m_eventType = type;
      m_keyCode = WXK_NONE;
  
      m_x =
      m_y = wxDefaultCoord;
      m_hasPosition = false;
  
      InitPropagation();
  }
  
  wxKeyEvent::wxKeyEvent(const wxKeyEvent& evt)
            : wxEvent(evt),
              wxKeyboardState(evt)
  {
      DoAssignMembers(evt);
  
      InitPropagation();
  }
  
  wxKeyEvent::wxKeyEvent(wxEventType eventType, const wxKeyEvent& evt)
            : wxEvent(evt),
              wxKeyboardState(evt)
  {
      DoAssignMembers(evt);
  
      m_eventType = eventType;
  
      InitPropagation();
  }
  
  wxKeyEvent& wxKeyEvent::operator=(const wxKeyEvent& evt)
  {
      if ( &evt != this )
      {
          wxEvent::operator=(evt);
  
          // Borland C++ 5.82 doesn't compile an explicit call to an
          // implicitly defined operator=() so need to do it this way:
          *static_cast<wxKeyboardState *>(this) = evt;
  
          DoAssignMembers(evt);
      }
      return *this;
  }
  
  void wxKeyEvent::InitPositionIfNecessary() const
  {
      if ( m_hasPosition )
          return;
  
      // We're const because we're called from const Get[XY]() methods but we
      // need to update the "cached" values.
      wxKeyEvent& self = const_cast<wxKeyEvent&>(*this);
      self.m_hasPosition = true;
  
      // The only position we can possibly associate with the keyboard event on
      // the platforms where it doesn't carry it already is the mouse position.
      wxGetMousePosition(&self.m_x, &self.m_y);
  
      // If this event is associated with a window, the position should be in its
      // client coordinates, but otherwise leave it in screen coordinates as what
      // else can we use?
      wxWindow* const win = wxDynamicCast(GetEventObject(), wxWindow);
      if ( win )
          win->ScreenToClient(&self.m_x, &self.m_y);
  }
  
  wxCoord wxKeyEvent::GetX() const
  {
      InitPositionIfNecessary();
  
      return m_x;
  }
  
  wxCoord wxKeyEvent::GetY() const
  {
      InitPositionIfNecessary();
  
      return m_y;
  }
  
  bool wxKeyEvent::IsKeyInCategory(int category) const
  {
      switch ( GetKeyCode() )
      {
          case WXK_LEFT:
          case WXK_RIGHT:
          case WXK_UP:
          case WXK_DOWN:
          case WXK_NUMPAD_LEFT:
          case WXK_NUMPAD_RIGHT:
          case WXK_NUMPAD_UP:
          case WXK_NUMPAD_DOWN:
              return (category & WXK_CATEGORY_ARROW) != 0;
  
          case WXK_PAGEDOWN:
          case WXK_PAGEUP:
          case WXK_NUMPAD_PAGEUP:
          case WXK_NUMPAD_PAGEDOWN:
              return (category & WXK_CATEGORY_PAGING) != 0;
  
          case WXK_HOME:
          case WXK_END:
          case WXK_NUMPAD_HOME:
          case WXK_NUMPAD_END:
              return (category & WXK_CATEGORY_JUMP) != 0;
  
          case WXK_TAB:
          case WXK_NUMPAD_TAB:
              return (category & WXK_CATEGORY_TAB) != 0;
  
          case WXK_BACK:
          case WXK_DELETE:
          case WXK_NUMPAD_DELETE:
              return (category & WXK_CATEGORY_CUT) != 0;
  
          default:
              return false;
      }
  }
  
  // ----------------------------------------------------------------------------
  // wxWindowCreateEvent
  // ----------------------------------------------------------------------------
  
  wxWindowCreateEvent::wxWindowCreateEvent(wxWindow *win)
  {
      SetEventType(wxEVT_CREATE);
      SetEventObject(win);
  }
  
  // ----------------------------------------------------------------------------
  // wxWindowDestroyEvent
  // ----------------------------------------------------------------------------
  
  wxWindowDestroyEvent::wxWindowDestroyEvent(wxWindow *win)
  {
      SetEventType(wxEVT_DESTROY);
      SetEventObject(win);
  }
  
  // ----------------------------------------------------------------------------
  // wxChildFocusEvent
  // ----------------------------------------------------------------------------
  
  wxChildFocusEvent::wxChildFocusEvent(wxWindow *win)
                   : wxCommandEvent(wxEVT_CHILD_FOCUS)
  {
      SetEventObject(win);
  }
  
  // ----------------------------------------------------------------------------
  // wxHelpEvent
  // ----------------------------------------------------------------------------
  
  /* static */
  wxHelpEvent::Origin wxHelpEvent::GuessOrigin(Origin origin)
  {
      if ( origin == Origin_Unknown )
      {
          // assume that the event comes from the help button if it's not from
          // keyboard and that pressing F1 always results in the help event
          origin = wxGetKeyState(WXK_F1) ? Origin_Keyboard : Origin_HelpButton;
      }
  
      return origin;
  }
  
  #endif // wxUSE_GUI
  
  
  #if wxUSE_BASE
  
  // ----------------------------------------------------------------------------
  // wxEventHashTable
  // ----------------------------------------------------------------------------
  
  static const int EVENT_TYPE_TABLE_INIT_SIZE = 31; // Not too big not too small...
  
  wxEventHashTable* wxEventHashTable::sm_first = NULL;
  
  wxEventHashTable::wxEventHashTable(const wxEventTable &table)
                  : m_table(table),
                    m_rebuildHash(true)
  {
      AllocEventTypeTable(EVENT_TYPE_TABLE_INIT_SIZE);
  
      m_next = sm_first;
      if (m_next)
          m_next->m_previous = this;
      sm_first = this;
  }
  
  wxEventHashTable::~wxEventHashTable()
  {
      if (m_next)
          m_next->m_previous = m_previous;
      if (m_previous)
          m_previous->m_next = m_next;
      if (sm_first == this)
          sm_first = m_next;
  
      Clear();
  }
  
  void wxEventHashTable::Clear()
  {
      for ( size_t i = 0; i < m_size; i++ )
      {
          EventTypeTablePointer  eTTnode = m_eventTypeTable[i];
          delete eTTnode;
      }
  
      wxDELETEA(m_eventTypeTable);
  
      m_size = 0;
  }
  
  #if wxUSE_MEMORY_TRACING
  
  // Clear all tables
  void wxEventHashTable::ClearAll()
  {
      wxEventHashTable* table = sm_first;
      while (table)
      {
          table->Clear();
          table = table->m_next;
      }
  }
  
  #endif // wxUSE_MEMORY_TRACING
  
  bool wxEventHashTable::HandleEvent(wxEvent &event, wxEvtHandler *self)
  {
      if (m_rebuildHash)
      {
          InitHashTable();
          m_rebuildHash = false;
      }
  
      if (!m_eventTypeTable)
          return false;
  
      // Find all entries for the given event type.
      wxEventType eventType = event.GetEventType();
      const EventTypeTablePointer eTTnode = m_eventTypeTable[eventType % m_size];
      if (eTTnode && eTTnode->eventType == eventType)
      {
          // Now start the search for an event handler
          // that can handle an event with the given ID.
          const wxEventTableEntryPointerArray&
              eventEntryTable = eTTnode->eventEntryTable;
  
          const size_t count = eventEntryTable.GetCount();
          for (size_t n = 0; n < count; n++)
          {
              const wxEventTableEntry& entry = *eventEntryTable[n];
              if ( wxEvtHandler::ProcessEventIfMatchesId(entry, self, event) )
                  return true;
          }
      }
  
      return false;
  }
  
  void wxEventHashTable::InitHashTable()
  {
      // Loop over the event tables and all its base tables.
      const wxEventTable *table = &m_table;
      while (table)
      {
          // Retrieve all valid event handler entries
          const wxEventTableEntry *entry = table->entries;
          while (entry->m_fn != 0)
          {
              // Add the event entry in the Hash.
              AddEntry(*entry);
  
              entry++;
          }
  
          table = table->baseTable;
      }
  
      // Let's free some memory.
      size_t i;
      for(i = 0; i < m_size; i++)
      {
          EventTypeTablePointer  eTTnode = m_eventTypeTable[i];
          if (eTTnode)
          {
              eTTnode->eventEntryTable.Shrink();
          }
      }
  }
  
  void wxEventHashTable::AddEntry(const wxEventTableEntry &entry)
  {
      // This might happen 'accidentally' as the app is exiting
      if (!m_eventTypeTable)
          return;
  
      EventTypeTablePointer *peTTnode = &m_eventTypeTable[entry.m_eventType % m_size];
      EventTypeTablePointer  eTTnode = *peTTnode;
  
      if (eTTnode)
      {
          if (eTTnode->eventType != entry.m_eventType)
          {
              // Resize the table!
              GrowEventTypeTable();
              // Try again to add it.
              AddEntry(entry);
              return;
          }
      }
      else
      {
          eTTnode = new EventTypeTable;
          eTTnode->eventType = entry.m_eventType;
          *peTTnode = eTTnode;
      }
  
      // Fill all hash entries between entry.m_id and entry.m_lastId...
      eTTnode->eventEntryTable.Add(&entry);
  }
  
  void wxEventHashTable::AllocEventTypeTable(size_t size)
  {
      m_eventTypeTable = new EventTypeTablePointer[size];
      memset((void *)m_eventTypeTable, 0, sizeof(EventTypeTablePointer)*size);
      m_size = size;
  }
  
  void wxEventHashTable::GrowEventTypeTable()
  {
      size_t oldSize = m_size;
      EventTypeTablePointer *oldEventTypeTable = m_eventTypeTable;
  
      // TODO: Search the most optimal grow sequence
      AllocEventTypeTable(/* GetNextPrime(oldSize) */oldSize*2+1);
  
      for ( size_t i = 0; i < oldSize; /* */ )
      {
          EventTypeTablePointer  eTToldNode = oldEventTypeTable[i];
          if (eTToldNode)
          {
              EventTypeTablePointer *peTTnode = &m_eventTypeTable[eTToldNode->eventType % m_size];
              EventTypeTablePointer  eTTnode = *peTTnode;
  
              // Check for collision, we don't want any.
              if (eTTnode)
              {
                  GrowEventTypeTable();
                  continue; // Don't increment the counter,
                            // as we still need to add this element.
              }
              else
              {
                  // Get the old value and put it in the new table.
                  *peTTnode = oldEventTypeTable[i];
              }
          }
  
          i++;
      }
  
      delete[] oldEventTypeTable;
  }
  
  // ----------------------------------------------------------------------------
  // wxEvtHandler
  // ----------------------------------------------------------------------------
  
  wxEvtHandler::wxEvtHandler()
  {
      m_nextHandler = NULL;
      m_previousHandler = NULL;
      m_enabled = true;
      m_dynamicEvents = NULL;
      m_pendingEvents = NULL;
  
      // no client data (yet)
      m_clientData = NULL;
      m_clientDataType = wxClientData_None;
  }
  
  wxEvtHandler::~wxEvtHandler()
  {
      Unlink();
  
      if (m_dynamicEvents)
      {
          size_t cookie;
          for ( wxDynamicEventTableEntry* entry = GetFirstDynamicEntry(cookie);
                entry;
                entry = GetNextDynamicEntry(cookie) )
          {
              // Remove ourselves from sink destructor notifications
              // (this has usually been done, in wxTrackable destructor)
              wxEvtHandler *eventSink = entry->m_fn->GetEvtHandler();
              if ( eventSink )
              {
                  wxEventConnectionRef * const
                      evtConnRef = FindRefInTrackerList(eventSink);
                  if ( evtConnRef )
                  {
                      eventSink->RemoveNode(evtConnRef);
                      delete evtConnRef;
                  }
              }
  
              delete entry->m_callbackUserData;
              delete entry;
          }
          delete m_dynamicEvents;
      }
  
      // Remove us from the list of the pending events if necessary.
      if (wxTheApp)
          wxTheApp->RemovePendingEventHandler(this);
  
      DeletePendingEvents();
  
      // we only delete object data, not untyped
      if ( m_clientDataType == wxClientData_Object )
          delete m_clientObject;
  }
  
  void wxEvtHandler::Unlink()
  {
      // this event handler must take itself out of the chain of handlers:
  
      if (m_previousHandler)
          m_previousHandler->SetNextHandler(m_nextHandler);
  
      if (m_nextHandler)
          m_nextHandler->SetPreviousHandler(m_previousHandler);
  
      m_nextHandler = NULL;
      m_previousHandler = NULL;
  }
  
  bool wxEvtHandler::IsUnlinked() const
  {
      return m_previousHandler == NULL &&
             m_nextHandler == NULL;
  }
  
  wxEventFilter* wxEvtHandler::ms_filterList = NULL;
  
  /* static */ void wxEvtHandler::AddFilter(wxEventFilter* filter)
  {
      wxCHECK_RET( filter, "NULL filter" );
  
      filter->m_next = ms_filterList;
      ms_filterList = filter;
  }
  
  /* static */ void wxEvtHandler::RemoveFilter(wxEventFilter* filter)
  {
      wxEventFilter* prev = NULL;
      for ( wxEventFilter* f = ms_filterList; f; f = f->m_next )
      {
          if ( f == filter )
          {
              // Set the previous list element or the list head to the next
              // element.
              if ( prev )
                  prev->m_next = f->m_next;
              else
                  ms_filterList = f->m_next;
  
              // Also reset the next pointer in the filter itself just to avoid
              // having possibly dangling pointers, even though it's not strictly
              // necessary.
              f->m_next = NULL;
  
              // Skip the assert below.
              return;
          }
  
          prev = f;
      }
  
      wxFAIL_MSG( "Filter not found" );
  }
  
  #if wxUSE_THREADS
  
  bool wxEvtHandler::ProcessThreadEvent(const wxEvent& event)
  {
      // check that we are really in a child thread
      wxASSERT_MSG( !wxThread::IsMain(),
                    wxT("use ProcessEvent() in main thread") );
  
      AddPendingEvent(event);
  
      return true;
  }
  
  #endif // wxUSE_THREADS
  
  void wxEvtHandler::QueueEvent(wxEvent *event)
  {
      wxCHECK_RET( event, "NULL event can't be posted" );
  
      if (!wxTheApp)
      {
          // we need an event loop which manages the list of event handlers with
          // pending events... cannot proceed without it!
          wxLogDebug("No application object! Cannot queue this event!");
  
          // anyway delete the given event to avoid memory leaks
          delete event;
  
          return;
      }
  
      // 1) Add this event to our list of pending events
      wxENTER_CRIT_SECT( m_pendingEventsLock );
  
      if ( !m_pendingEvents )
          m_pendingEvents = new wxList;
  
      m_pendingEvents->Append(event);
  
      // 2) Add this event handler to list of event handlers that
      //    have pending events.
  
      wxTheApp->AppendPendingEventHandler(this);
  
      // only release m_pendingEventsLock now because otherwise there is a race
      // condition as described in the ticket #9093: we could process the event
      // just added to m_pendingEvents in our ProcessPendingEvents() below before
      // we had time to append this pointer to wxHandlersWithPendingEvents list; thus
      // breaking the invariant that a handler should be in the list iff it has
      // any pending events to process
      wxLEAVE_CRIT_SECT( m_pendingEventsLock );
  
      // 3) Inform the system that new pending events are somewhere,
      //    and that these should be processed in idle time.
      wxWakeUpIdle();
  }
  
  void wxEvtHandler::DeletePendingEvents()
  {
      if (m_pendingEvents)
          m_pendingEvents->DeleteContents(true);
      wxDELETE(m_pendingEvents);
  }
  
  void wxEvtHandler::ProcessPendingEvents()
  {
      if (!wxTheApp)
      {
          // we need an event loop which manages the list of event handlers with
          // pending events... cannot proceed without it!
          wxLogDebug("No application object! Cannot process pending events!");
          return;
      }
  
      // we need to process only a single pending event in this call because
      // each call to ProcessEvent() could result in the destruction of this
      // same event handler (see the comment at the end of this function)
  
      wxENTER_CRIT_SECT( m_pendingEventsLock );
  
      // this method is only called by wxApp if this handler does have
      // pending events
      wxCHECK_RET( m_pendingEvents && !m_pendingEvents->IsEmpty(),
                   "should have pending events if called" );
  
      wxList::compatibility_iterator node = m_pendingEvents->GetFirst();
      wxEvent* pEvent = static_cast<wxEvent *>(node->GetData());
  
      // find the first event which can be processed now:
      wxEventLoopBase* evtLoop = wxEventLoopBase::GetActive();
      if (evtLoop && evtLoop->IsYielding())
      {
          while (node && pEvent && !evtLoop->IsEventAllowedInsideYield(pEvent->GetEventCategory()))
          {
              node = node->GetNext();
              pEvent = node ? static_cast<wxEvent *>(node->GetData()) : NULL;
          }
  
          if (!node)
          {
              // all our events are NOT processable now... signal this:
              wxTheApp->DelayPendingEventHandler(this);
  
              // see the comment at the beginning of evtloop.h header for the
              // logic behind YieldFor() and behind DelayPendingEventHandler()
  
              wxLEAVE_CRIT_SECT( m_pendingEventsLock );
  
              return;
          }
      }
  
      wxEventPtr event(pEvent);
  
      // it's important we remove event from list before processing it, else a
      // nested event loop, for example from a modal dialog, might process the
      // same event again.
      m_pendingEvents->Erase(node);
  
      if ( m_pendingEvents->IsEmpty() )
      {
          // if there are no more pending events left, we don't need to
          // stay in this list
          wxTheApp->RemovePendingEventHandler(this);
      }
  
      wxLEAVE_CRIT_SECT( m_pendingEventsLock );
  
      ProcessEvent(*event);
  
      // careful: this object could have been deleted by the event handler
      // executed by the above ProcessEvent() call, so we can't access any fields
      // of this object any more
  }
  
  /* static */
  bool wxEvtHandler::ProcessEventIfMatchesId(const wxEventTableEntryBase& entry,
                                             wxEvtHandler *handler,
                                             wxEvent& event)
  {
      int tableId1 = entry.m_id,
          tableId2 = entry.m_lastId;
  
      // match only if the event type is the same and the id is either -1 in
      // the event table (meaning "any") or the event id matches the id
      // specified in the event table either exactly or by falling into
      // range between first and last
      if ((tableId1 == wxID_ANY) ||
          (tableId2 == wxID_ANY && tableId1 == event.GetId()) ||
          (tableId2 != wxID_ANY &&
           (event.GetId() >= tableId1 && event.GetId() <= tableId2)))
      {
          event.Skip(false);
          event.m_callbackUserData = entry.m_callbackUserData;
  
  #if wxUSE_EXCEPTIONS
          if ( wxTheApp )
          {
              // call the handler via wxApp method which allows the user to catch
              // any exceptions which may be thrown by any handler in the program
              // in one place
              wxTheApp->CallEventHandler(handler, *entry.m_fn, event);
          }
          else
  #endif // wxUSE_EXCEPTIONS
          {
              (*entry.m_fn)(handler, event);
          }
  
          if (!event.GetSkipped())
              return true;
      }
  
      return false;
  }
  
  bool wxEvtHandler::DoTryApp(wxEvent& event)
  {
      if ( wxTheApp && (this != wxTheApp) )
      {
          // Special case: don't pass wxEVT_IDLE to wxApp, since it'll always
          // swallow it. wxEVT_IDLE is sent explicitly to wxApp so it will be
          // processed appropriately via SearchEventTable.
          if ( event.GetEventType() != wxEVT_IDLE )
          {
              if ( wxTheApp->ProcessEvent(event) )
                  return true;
          }
      }
  
      return false;
  }
  
  bool wxEvtHandler::TryBefore(wxEvent& event)
  {
  #if WXWIN_COMPATIBILITY_2_8
      // call the old virtual function to keep the code overriding it working
      return TryValidator(event);
  #else
      wxUnusedVar(event);
      return false;
  #endif
  }
  
  bool wxEvtHandler::TryAfter(wxEvent& event)
  {
      // We only want to pass the window to the application object once even if
      // there are several chained handlers. Ensure that this is what happens by
      // only calling DoTryApp() if there is no next handler (which would do it).
      //
      // Notice that, unlike simply calling TryAfter() on the last handler in the
      // chain only from ProcessEvent(), this also works with wxWindow object in
      // the middle of the chain: its overridden TryAfter() will still be called
      // and propagate the event upwards the window hierarchy even if it's not
      // the last one in the chain (which, admittedly, shouldn't happen often).
      if ( GetNextHandler() )
          return GetNextHandler()->TryAfter(event);
  
      // If this event is going to be processed in another handler next, don't
      // pass it to wxTheApp now, it will be done from TryAfter() of this other
      // handler.
      if ( event.WillBeProcessedAgain() )
          return false;
  
  #if WXWIN_COMPATIBILITY_2_8
      // as above, call the old virtual function for compatibility
      return TryParent(event);
  #else
      return DoTryApp(event);
  #endif
  }
  
  bool wxEvtHandler::ProcessEvent(wxEvent& event)
  {
      // The very first thing we do is to allow any registered filters to hook
      // into event processing in order to globally pre-process all events.
      //
      // Note that we should only do it if we're the first event handler called
      // to avoid calling FilterEvent() multiple times as the event goes through
      // the event handler chain and possibly upwards the window hierarchy.
      if ( !event.WasProcessed() )
      {
          for ( wxEventFilter* f = ms_filterList; f; f = f->m_next )
          {
              int rc = f->FilterEvent(event);
              if ( rc != wxEventFilter::Event_Skip )
              {
                  wxASSERT_MSG( rc == wxEventFilter::Event_Ignore ||
                                  rc == wxEventFilter::Event_Processed,
                                "unexpected FilterEvent() return value" );
  
                  return rc != wxEventFilter::Event_Ignore;
              }
              //else: proceed normally
          }
      }
  
      // Short circuit the event processing logic if we're requested to process
      // this event in this handler only, see DoTryChain() for more details.
      if ( event.ShouldProcessOnlyIn(this) )
          return TryBeforeAndHere(event);
  
  
      // Try to process the event in this handler itself.
      if ( ProcessEventLocally(event) )
      {
          // It is possible that DoTryChain() called from ProcessEventLocally()
          // returned true but the event was not really processed: this happens
          // if a custom handler ignores the request to process the event in this
          // handler only and in this case we should skip the post processing
          // done in TryAfter() but still return the correct value ourselves to
          // indicate whether we did or did not find a handler for this event.
          return !event.GetSkipped();
      }
  
      // If we still didn't find a handler, propagate the event upwards the
      // window chain and/or to the application object.
      if ( TryAfter(event) )
          return true;
  
  
      // No handler found anywhere, bail out.
      return false;
  }
  
  bool wxEvtHandler::ProcessEventLocally(wxEvent& event)
  {
      // Try the hooks which should be called before our own handlers and this
      // handler itself first. Notice that we should not call ProcessEvent() on
      // this one as we're already called from it, which explains why we do it
      // here and not in DoTryChain()
      return TryBeforeAndHere(event) || DoTryChain(event);
  }
  
  bool wxEvtHandler::DoTryChain(wxEvent& event)
  {
      for ( wxEvtHandler *h = GetNextHandler(); h; h = h->GetNextHandler() )
      {
          // We need to process this event at the level of this handler only
          // right now, the pre-/post-processing was either already done by
          // ProcessEvent() from which we were called or will be done by it when
          // we return.
          //
          // However we must call ProcessEvent() and not TryHereOnly() because the
          // existing code (including some in wxWidgets itself) expects the
          // overridden ProcessEvent() in its custom event handlers pushed on a
          // window to be called.
          //
          // So we must call ProcessEvent() but it must not do what it usually
          // does. To resolve this paradox we set up a special flag inside the
          // object itself to let ProcessEvent() know that it shouldn't do any
          // pre/post-processing for this event if it gets it. Note that this
          // only applies to this handler, if the event is passed to another one
          // by explicitly calling its ProcessEvent(), pre/post-processing should
          // be done as usual.
          //
          // Final complication is that if the implementation of ProcessEvent()
          // called wxEvent::DidntHonourProcessOnlyIn() (as the gross hack that
          // is wxScrollHelperEvtHandler::ProcessEvent() does) and ignored our
          // request to process event in this handler only, we have to compensate
          // for it by not processing the event further because this was already
          // done by that rogue event handler.
          wxEventProcessInHandlerOnly processInHandlerOnly(event, h);
          if ( h->ProcessEvent(event) )
          {
              // Make sure "skipped" flag is not set as the event was really
              // processed in this case. Normally it shouldn't be set anyhow but
              // make sure just in case the user code does something strange.
              event.Skip(false);
  
              return true;
          }
  
          if ( !event.ShouldProcessOnlyIn(h) )
          {
              // Still return true to indicate that no further processing should
              // be undertaken but ensure that "skipped" flag is set so that the
              // caller knows that the event was not really processed.
              event.Skip();
  
              return true;
          }
      }
  
      return false;
  }
  
  bool wxEvtHandler::TryHereOnly(wxEvent& event)
  {
      // If the event handler is disabled it doesn't process any events
      if ( !GetEvtHandlerEnabled() )
          return false;
  
      // Handle per-instance dynamic event tables first
      if ( m_dynamicEvents && SearchDynamicEventTable(event) )
          return true;
  
      // Then static per-class event tables
      if ( GetEventHashTable().HandleEvent(event, this) )
          return true;
  
  #ifdef wxHAS_CALL_AFTER
      // There is an implicit entry for async method calls processing in every
      // event handler:
      if ( event.GetEventType() == wxEVT_ASYNC_METHOD_CALL &&
              event.GetEventObject() == this )
      {
          static_cast<wxAsyncMethodCallEvent&>(event).Execute();
          return true;
      }
  #endif // wxHAS_CALL_AFTER
  
      // We don't have a handler for this event.
      return false;
  }
  
  bool wxEvtHandler::SafelyProcessEvent(wxEvent& event)
  {
  #if wxUSE_EXCEPTIONS
      try
      {
  #endif
          return ProcessEvent(event);
  #if wxUSE_EXCEPTIONS
      }
      catch ( ... )
      {
          WXConsumeException();
  
          return false;
      }
  #endif // wxUSE_EXCEPTIONS
  }
  
  #if wxUSE_EXCEPTIONS
  /* static */
  void wxEvtHandler::WXConsumeException()
  {
      wxEventLoopBase * const loop = wxEventLoopBase::GetActive();
      try
      {
          if ( !wxTheApp || !wxTheApp->OnExceptionInMainLoop() )
          {
              // If OnExceptionInMainLoop() returns false, we're supposed to exit
              // the program and for this we need to exit the main loop, not the
              // possibly nested one we're running right now.
              if ( wxTheApp )
              {
                  wxTheApp->ExitMainLoop();
              }
              else
              {
                  // We must not continue running after an exception, unless
                  // explicitly requested, so if we can't ensure this in any
                  // other way, do it brutally like this.
                  wxAbort();
              }
  
          }
          //else: continue running current event loop
      }
      catch ( ... )
      {
          // OnExceptionInMainLoop() threw, possibly rethrowing the same
          // exception again. We have to deal with it here because we can't
          // allow the exception to escape from the handling code, this will
          // result in a crash at best (e.g. when using wxGTK as C++
          // exceptions can't propagate through the C GTK+ code and corrupt
          // the stack) and in something even more weird at worst (like
          // exceptions completely disappearing into the void under some
          // 64 bit versions of Windows).
          if ( loop && !loop->IsYielding() )
              loop->Exit();
  
          // Give the application one last possibility to store the exception
          // for rethrowing it later, when we get back to our code.
          bool stored = false;
          try
          {
              if ( wxTheApp )
                  stored = wxTheApp->StoreCurrentException();
          }
          catch ( ... )
          {
              // StoreCurrentException() really shouldn't throw, but if it
              // did, take it as an indication that it didn't store it.
          }
  
          // If it didn't take it, just abort, at least like this we behave
          // consistently everywhere.
          if ( !stored )
          {
              try
              {
                  if ( wxTheApp )
                      wxTheApp->OnUnhandledException();
              }
              catch ( ... )
              {
                  // And OnUnhandledException() absolutely shouldn't throw,
                  // but we still must account for the possibility that it
                  // did. At least show some information about the exception
                  // in this case.
                  wxTheApp->wxAppConsoleBase::OnUnhandledException();
              }
  
              wxAbort();
          }
      }
  }
  
  #endif // wxUSE_EXCEPTIONS
  
  bool wxEvtHandler::SearchEventTable(wxEventTable& table, wxEvent& event)
  {
      const wxEventType eventType = event.GetEventType();
      for ( int i = 0; table.entries[i].m_fn != 0; i++ )
      {
          const wxEventTableEntry& entry = table.entries[i];
          if ( eventType == entry.m_eventType )
          {
              if ( ProcessEventIfMatchesId(entry, this, event) )
                  return true;
          }
      }
  
      return false;
  }
  
  void wxEvtHandler::DoBind(int id,
                            int lastId,
                            wxEventType eventType,
                            wxEventFunctor *func,
                            wxObject *userData)
  {
      wxDynamicEventTableEntry *entry =
          new wxDynamicEventTableEntry(eventType, id, lastId, func, userData);
  
      // Check if the derived class allows binding such event handlers.
      if ( !OnDynamicBind(*entry) )
      {
          delete entry;
          return;
      }
  
      if (!m_dynamicEvents)
          m_dynamicEvents = new DynamicEvents;
  
      // We prefer to push back the entry here and then iterate over the vector
      // in reverse direction in GetNextDynamicEntry() as it's more efficient
      // than inserting the element at the front.
      m_dynamicEvents->push_back(entry);
  
      // Make sure we get to know when a sink is destroyed
      wxEvtHandler *eventSink = func->GetEvtHandler();
      if ( eventSink && eventSink != this )
      {
          wxEventConnectionRef *evtConnRef = FindRefInTrackerList(eventSink);
          if ( evtConnRef )
              evtConnRef->IncRef( );
          else
              new wxEventConnectionRef(this, eventSink);
      }
  }
  
  bool
  wxEvtHandler::DoUnbind(int id,
                         int lastId,
                         wxEventType eventType,
                         const wxEventFunctor& func,
                         wxObject *userData)
  {
      if (!m_dynamicEvents)
          return false;
  
      size_t cookie;
      for ( wxDynamicEventTableEntry* entry = GetFirstDynamicEntry(cookie);
            entry;
            entry = GetNextDynamicEntry(cookie) )
      {
          if ((entry->m_id == id) &&
              ((entry->m_lastId == lastId) || (lastId == wxID_ANY)) &&
              ((entry->m_eventType == eventType) || (eventType == wxEVT_NULL)) &&
              entry->m_fn->IsMatching(func) &&
              ((entry->m_callbackUserData == userData) || !userData))
          {
              // Remove connection from tracker node (wxEventConnectionRef)
              wxEvtHandler *eventSink = entry->m_fn->GetEvtHandler();
              if ( eventSink && eventSink != this )
              {
                  wxEventConnectionRef *evtConnRef = FindRefInTrackerList(eventSink);
                  if ( evtConnRef )
                      evtConnRef->DecRef();
              }
  
              delete entry->m_callbackUserData;
  
              // We can't delete the entry from the vector if we're currently
              // iterating over it. As we don't know whether we're or not, just
              // null it for now and we will really erase it when we do finish
              // iterating over it the next time.
              //
              // Notice that we rely on "cookie" being just the index into the
              // vector, which is not guaranteed by our API, but here we can use
              // this implementation detail.
              (*m_dynamicEvents)[cookie] = NULL;
  
              delete entry;
              return true;
          }
      }
      return false;
  }
  
  wxDynamicEventTableEntry*
  wxEvtHandler::GetFirstDynamicEntry(size_t& cookie) const
  {
      if ( !m_dynamicEvents )
          return NULL;
  
      // The handlers are in LIFO order, so we must start at the end.
      cookie = m_dynamicEvents->size();
      return GetNextDynamicEntry(cookie);
  }
  
  wxDynamicEventTableEntry*
  wxEvtHandler::GetNextDynamicEntry(size_t& cookie) const
  {
      // On entry here cookie is one greater than the index of the entry to
      // return, so if it is 0, it means that there are no more entries.
      while ( cookie )
      {
          // Otherwise return the element at the previous index, skipping any
          // null elements which indicate removed entries.
          wxDynamicEventTableEntry* const entry = m_dynamicEvents->at(--cookie);
          if ( entry )
              return entry;
      }
  
      return NULL;
  }
  
  bool wxEvtHandler::SearchDynamicEventTable( wxEvent& event )
  {
      wxCHECK_MSG( m_dynamicEvents, false,
                   wxT("caller should check that we have dynamic events") );
  
      DynamicEvents& dynamicEvents = *m_dynamicEvents;
  
      bool needToPruneDeleted = false;
  
      // We can't use Get{First,Next}DynamicEntry() here as they hide the deleted
      // but not yet pruned entries from the caller, but here we do want to know
      // about them, so iterate directly. Remember to do it in the reverse order
      // to honour the order of handlers connection.
      for ( size_t n = dynamicEvents.size(); n; n-- )
      {
          wxDynamicEventTableEntry* const entry = dynamicEvents[n - 1];
  
          if ( !entry )
          {
              // This entry must have been unbound at some time in the past, so
              // skip it now and really remove it from the vector below, once we
              // finish iterating.
              needToPruneDeleted = true;
              continue;
          }
  
          if ( event.GetEventType() == entry->m_eventType )
          {
              wxEvtHandler *handler = entry->m_fn->GetEvtHandler();
              if ( !handler )
                 handler = this;
              if ( ProcessEventIfMatchesId(*entry, handler, event) )
              {
                  // It's important to skip pruning of the unbound event entries
                  // below because this object itself could have been deleted by
                  // the event handler making m_dynamicEvents a dangling pointer
                  // which can't be accessed any longer in the code below.
                  //
                  // In practice, it hopefully shouldn't be a problem to wait
                  // until we get an event that we don't handle before pruning
                  // because this should happen soon enough and even if it
                  // doesn't the worst possible outcome is slightly increased
                  // memory consumption while not skipping pruning can result in
                  // hard to reproduce (because they require the disconnection
                  // and deletion happen at the same time which is not always the
                  // case) crashes.
                  return true;
              }
          }
      }
  
      if ( needToPruneDeleted )
      {
          size_t nNew = 0;
          for ( size_t n = 0; n != dynamicEvents.size(); n++ )
          {
              if ( dynamicEvents[n] )
                  dynamicEvents[nNew++] = dynamicEvents[n];
          }
  
          wxASSERT( nNew != dynamicEvents.size() );
          dynamicEvents.resize(nNew);
      }
  
      return false;
  }
  
  void wxEvtHandler::DoSetClientObject( wxClientData *data )
  {
      wxASSERT_MSG( m_clientDataType != wxClientData_Void,
                    wxT("can't have both object and void client data") );
  
      delete m_clientObject;
  
      m_clientObject = data;
      m_clientDataType = wxClientData_Object;
  }
  
  wxClientData *wxEvtHandler::DoGetClientObject() const
  {
      // it's not an error to call GetClientObject() on a window which doesn't
      // have client data at all - NULL will be returned
      wxASSERT_MSG( m_clientDataType != wxClientData_Void,
                    wxT("this window doesn't have object client data") );
  
      return m_clientObject;
  }
  
  void wxEvtHandler::DoSetClientData( void *data )
  {
      wxASSERT_MSG( m_clientDataType != wxClientData_Object,
                    wxT("can't have both object and void client data") );
  
      m_clientData = data;
      m_clientDataType = wxClientData_Void;
  }
  
  void *wxEvtHandler::DoGetClientData() const
  {
      // it's not an error to call GetClientData() on a window which doesn't have
      // client data at all - NULL will be returned
      wxASSERT_MSG( m_clientDataType != wxClientData_Object,
                    wxT("this window doesn't have void client data") );
  
      return m_clientData;
  }
  
  // A helper to find an wxEventConnectionRef object
  wxEventConnectionRef *
  wxEvtHandler::FindRefInTrackerList(wxEvtHandler *eventSink)
  {
      for ( wxTrackerNode *node = eventSink->GetFirst(); node; node = node->m_nxt )
      {
          // we only want wxEventConnectionRef nodes here
          wxEventConnectionRef *evtConnRef = node->ToEventConnection();
          if ( evtConnRef && evtConnRef->m_src == this )
          {
              wxASSERT( evtConnRef->m_sink==eventSink );
              return evtConnRef;
          }
      }
  
      return NULL;
  }
  
  void wxEvtHandler::OnSinkDestroyed( wxEvtHandler *sink )
  {
      wxASSERT(m_dynamicEvents);
  
      // remove all connections with this sink
      size_t cookie;
      for ( wxDynamicEventTableEntry* entry = GetFirstDynamicEntry(cookie);
            entry;
            entry = GetNextDynamicEntry(cookie) )
      {
          if ( entry->m_fn->GetEvtHandler() == sink )
          {
              delete entry->m_callbackUserData;
              delete entry;
  
              // Just as in DoUnbind(), we use our knowledge of
              // GetNextDynamicEntry() implementation here.
              (*m_dynamicEvents)[cookie] = NULL;
          }
      }
  }
  
  #endif // wxUSE_BASE
  
  #if wxUSE_GUI
  
  // Find a window with the focus, that is also a descendant of the given window.
  // This is used to determine the window to initially send commands to.
  wxWindow* wxFindFocusDescendant(wxWindow* ancestor)
  {
      // Process events starting with the window with the focus, if any.
      wxWindow* focusWin = wxWindow::FindFocus();
      wxWindow* win = focusWin;
  
      // Check if this is a descendant of this frame.
      // If not, win will be set to NULL.
      while (win)
      {
          if (win == ancestor)
              break;
          else
              win = win->GetParent();
      }
      if (win == NULL)
          focusWin = NULL;
  
      return focusWin;
  }
  
  // ----------------------------------------------------------------------------
  // wxEventBlocker
  // ----------------------------------------------------------------------------
  
  wxEventBlocker::wxEventBlocker(wxWindow *win, wxEventType type)
  {
      wxCHECK_RET(win, wxT("Null window given to wxEventBlocker"));
  
      m_window = win;
  
      Block(type);
      m_window->PushEventHandler(this);
  }
  
  wxEventBlocker::~wxEventBlocker()
  {
      wxEvtHandler *popped = m_window->PopEventHandler(false);
      wxCHECK_RET(popped == this,
          wxT("Don't push other event handlers into a window managed by wxEventBlocker!"));
  }
  
  bool wxEventBlocker::ProcessEvent(wxEvent& event)
  {
      // should this event be blocked?
      for ( size_t i = 0; i < m_eventsToBlock.size(); i++ )
      {
          wxEventType t = (wxEventType)m_eventsToBlock[i];
          if ( t == wxEVT_ANY || t == event.GetEventType() )
              return true;   // yes, it should: mark this event as processed
      }
  
      return wxEvtHandler::ProcessEvent(event);
  }
  
  #endif // wxUSE_GUI
  
  