// global variables
// ----------------------------------------------------------------------------
-// To put pending event handlers
-wxList *wxPendingEvents = (wxList *)NULL;
+// List containing event handlers with pending events (each handler can occur
+// at most once here)
+wxList *wxPendingEvents = NULL;
#if wxUSE_THREADS
// protects wxPendingEvents list
- wxCriticalSection *wxPendingEventsLocker = (wxCriticalSection *)NULL;
+ wxCriticalSection *wxPendingEventsLocker = NULL;
#endif
-#if !WXWIN_COMPATIBILITY_EVENT_TYPES
-
// common event types are defined here, other event types are defined by the
// components which use them
DEFINE_EVENT_TYPE(wxEVT_SOCKET)
DEFINE_EVENT_TYPE(wxEVT_TIMER)
-#endif // !WXWIN_COMPATIBILITY_EVENT_TYPES
-
#endif // wxUSE_BASE
#if wxUSE_GUI
-#if !WXWIN_COMPATIBILITY_EVENT_TYPES
-
DEFINE_EVENT_TYPE(wxEVT_COMMAND_BUTTON_CLICKED)
DEFINE_EVENT_TYPE(wxEVT_COMMAND_CHECKBOX_CLICKED)
DEFINE_EVENT_TYPE(wxEVT_COMMAND_CHOICE_SELECTED)
DEFINE_EVENT_TYPE(wxEVT_HELP)
DEFINE_EVENT_TYPE(wxEVT_DETAILED_HELP)
-#endif // !WXWIN_COMPATIBILITY_EVENT_TYPES
-
#endif // wxUSE_GUI
#if wxUSE_BASE
#endif
}
-#if WXWIN_COMPATIBILITY_2_6
-long wxKeyEvent::KeyCode() const
-{
- return m_keyCode;
-}
-#endif // WXWIN_COMPATIBILITY_2_6
-
wxWindowCreateEvent::wxWindowCreateEvent(wxWindow *win)
{
SetEventType(wxEVT_CREATE);
}
+// ----------------------------------------------------------------------------
+// wxEventConnectionRef
+// ----------------------------------------------------------------------------
+
+// Below functions are mostly short but kept in cpp file to simplify setting
+// breakpoints (GDB)
+wxEventConnectionRef::wxEventConnectionRef(wxEvtHandler *src, wxEvtHandler *sink)
+ : m_src(src), m_sink(sink), m_refCount(1)
+{
+ wxASSERT( m_sink );
+ m_sink->AddNode( this );
+}
+
+wxEventConnectionRef::~wxEventConnectionRef()
+{
+}
+
+void wxEventConnectionRef::OnObjectDestroy( )
+{
+ if( m_src )
+ m_src->OnSinkDestroyed( m_sink );
+ // It is safe to delete this tracker object here
+ delete this;
+}
+
+void wxEventConnectionRef::DecRef( )
+{
+ if( !--m_refCount )
+ {
+ // The sink holds the only external pointer to this object
+ if( m_sink )
+ m_sink->RemoveNode(this);
+ delete this;
+ }
+}
+
+
// ----------------------------------------------------------------------------
// wxEvtHandler
// ----------------------------------------------------------------------------
m_enabled = true;
m_dynamicEvents = (wxList *) NULL;
m_pendingEvents = (wxList *) NULL;
-#if wxUSE_THREADS
-# if !defined(__VISAGECPP__)
- m_eventsLocker = new wxCriticalSection;
-# endif
-#endif
// no client data (yet)
m_clientData = NULL;
it != end;
++it )
{
-#if WXWIN_COMPATIBILITY_EVENT_TYPES
- wxEventTableEntry *entry = (wxEventTableEntry*)*it;
-#else // !WXWIN_COMPATIBILITY_EVENT_TYPES
wxDynamicEventTableEntry *entry = (wxDynamicEventTableEntry*)*it;
-#endif // WXWIN_COMPATIBILITY_EVENT_TYPES/!WXWIN_COMPATIBILITY_EVENT_TYPES
+ // Remove ourselves from sink destructor notifications
+ // (this has usually been been done, in wxTrackable destructor)
+ wxEvtHandler *eventSink = entry->m_eventSink;
+ if( eventSink )
+ {
+ wxEventConnectionRef *pecr = FindRefInTrackerList( eventSink );
+ if( pecr )
+ {
+ eventSink->RemoveNode( pecr );
+ delete pecr;
+ }
+ }
+
if (entry->m_callbackUserData)
delete entry->m_callbackUserData;
delete entry;
m_pendingEvents->DeleteContents(true);
delete m_pendingEvents;
-#if wxUSE_THREADS
-# if !defined(__VISAGECPP__)
- delete m_eventsLocker;
-# endif
-
// Remove us from wxPendingEvents if necessary.
- if(wxPendingEventsLocker)
- wxENTER_CRIT_SECT(*wxPendingEventsLocker);
if ( wxPendingEvents )
{
- // Delete all occurences of this from the list of pending events
- while (wxPendingEvents->DeleteObject(this)) { } // Do nothing
- }
- if(wxPendingEventsLocker)
- wxLEAVE_CRIT_SECT(*wxPendingEventsLocker);
+#if wxUSE_THREADS
+ if(wxPendingEventsLocker)
+ wxENTER_CRIT_SECT(*wxPendingEventsLocker);
#endif
+ if ( wxPendingEvents->DeleteObject(this) )
+ {
+ // check that we were present only once in the list
+ wxASSERT_MSG( !wxPendingEvents->Find(this),
+ "Handler occurs twice in wxPendingEvents list" );
+ }
+ //else: we weren't in this list at all, it's ok
+
+#if wxUSE_THREADS
+ if(wxPendingEventsLocker)
+ wxLEAVE_CRIT_SECT(*wxPendingEventsLocker);
+#endif
+ }
+
// we only delete object data, not untyped
if ( m_clientDataType == wxClientData_Object )
delete m_clientObject;
return true;
}
-void wxEvtHandler::ClearEventLocker()
-{
-#if !defined(__VISAGECPP__)
- delete m_eventsLocker;
- m_eventsLocker = NULL;
-#endif
-}
-
#endif // wxUSE_THREADS
void wxEvtHandler::AddPendingEvent(const wxEvent& event)
wxCHECK_RET( eventCopy,
_T("events of this type aren't supposed to be posted") );
- wxENTER_CRIT_SECT( Lock() );
+ wxENTER_CRIT_SECT( m_pendingEventsLock );
if ( !m_pendingEvents )
m_pendingEvents = new wxList;
m_pendingEvents->Append(eventCopy);
- wxLEAVE_CRIT_SECT( Lock() );
+ wxLEAVE_CRIT_SECT( m_pendingEventsLock );
// 2) Add this event handler to list of event handlers that
// have pending events.
if ( !wxPendingEvents )
wxPendingEvents = new wxList;
- wxPendingEvents->Append(this);
+ if ( !wxPendingEvents->Find(this) )
+ wxPendingEvents->Append(this);
wxLEAVE_CRIT_SECT(*wxPendingEventsLocker);
void wxEvtHandler::ProcessPendingEvents()
{
+ wxENTER_CRIT_SECT( m_pendingEventsLock );
+
// this method is only called by wxApp if this handler does have
// pending events
- wxCHECK_RET( m_pendingEvents,
- wxT("Please call wxApp::ProcessPendingEvents() instead") );
-
- wxENTER_CRIT_SECT( Lock() );
-
- // we leave the loop once we have processed all events that were present at
- // the start of ProcessPendingEvents because otherwise we could get into
- // infinite loop if the pending event handler execution resulted in another
- // event being posted
- size_t n = m_pendingEvents->size();
- for ( wxList::compatibility_iterator node = m_pendingEvents->GetFirst();
- node;
- node = m_pendingEvents->GetFirst() )
- {
- wxEvent *event = (wxEvent *)node->GetData();
-
- // It's importan 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.
+ wxCHECK_RET( m_pendingEvents && !m_pendingEvents->IsEmpty(),
+ "should have pending events if called" );
- m_pendingEvents->Erase(node);
+ wxList::compatibility_iterator node = m_pendingEvents->GetFirst();
+ wxEvent * const event = wx_static_cast(wxEvent *, node->GetData());
- wxLEAVE_CRIT_SECT( Lock() );
+ // 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);
- ProcessEvent(*event);
+ // if there are no more pending events left, we don't need to stay in this
+ // list
+ if ( m_pendingEvents->IsEmpty() )
+ wxPendingEvents->DeleteObject(this);
- delete event;
+ wxLEAVE_CRIT_SECT( m_pendingEventsLock );
- wxENTER_CRIT_SECT( Lock() );
+ ProcessEvent(*event);
- if ( --n == 0 )
- break;
- }
+ // 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
- wxLEAVE_CRIT_SECT( Lock() );
+ delete event;
}
/*
wxObject *userData,
wxEvtHandler* eventSink )
{
-#if WXWIN_COMPATIBILITY_EVENT_TYPES
- wxEventTableEntry *entry = new wxEventTableEntry;
- entry->m_eventType = eventType;
- entry->m_id = id;
- entry->m_lastId = lastId;
- entry->m_fn = func;
- entry->m_callbackUserData = userData;
-#else // !WXWIN_COMPATIBILITY_EVENT_TYPES
wxDynamicEventTableEntry *entry =
new wxDynamicEventTableEntry(eventType, id, lastId, func, userData, eventSink);
-#endif // WXWIN_COMPATIBILITY_EVENT_TYPES/!WXWIN_COMPATIBILITY_EVENT_TYPES
if (!m_dynamicEvents)
m_dynamicEvents = new wxList;
// Insert at the front of the list so most recent additions are found first
m_dynamicEvents->Insert( (wxObject*) entry );
+
+ // Make sure we get to know when a sink is destroyed
+ if( eventSink )
+ {
+ wxEventConnectionRef *pecr = FindRefInTrackerList( eventSink );
+ if( pecr )
+ pecr->IncRef( );
+ else
+ pecr = new wxEventConnectionRef(this,eventSink);
+ }
}
bool wxEvtHandler::Disconnect( int id, int lastId, wxEventType eventType,
if (!m_dynamicEvents)
return false;
+ // Remove connection from tracker node (wxEventConnectionRef)
+ if( eventSink )
+ {
+ wxEventConnectionRef *pecr = FindRefInTrackerList( eventSink );
+ if( pecr )
+ pecr->DecRef( );
+ }
+
wxList::compatibility_iterator node = m_dynamicEvents->GetFirst();
while (node)
{
-#if WXWIN_COMPATIBILITY_EVENT_TYPES
- wxEventTableEntry *entry = (wxEventTableEntry*)node->GetData();
-#else // !WXWIN_COMPATIBILITY_EVENT_TYPES
- wxDynamicEventTableEntry *entry = (wxDynamicEventTableEntry*)node->GetData();
-#endif // WXWIN_COMPATIBILITY_EVENT_TYPES/!WXWIN_COMPATIBILITY_EVENT_TYPES
+ wxDynamicEventTableEntry *entry = (wxDynamicEventTableEntry*)node->GetData();
if ((entry->m_id == id) &&
((entry->m_lastId == lastId) || (lastId == wxID_ANY)) &&
wxList::compatibility_iterator node = m_dynamicEvents->GetFirst();
while (node)
{
-#if WXWIN_COMPATIBILITY_EVENT_TYPES
- wxEventTableEntry *entry = (wxEventTableEntry*)node->GetData();
-#else // !WXWIN_COMPATIBILITY_EVENT_TYPES
wxDynamicEventTableEntry *entry = (wxDynamicEventTableEntry*)node->GetData();
-#endif // WXWIN_COMPATIBILITY_EVENT_TYPES/!WXWIN_COMPATIBILITY_EVENT_TYPES
// get next node before (maybe) calling the event handler as it could
// call Disconnect() invalidating the current node
if ((event.GetEventType() == entry->m_eventType) && (entry->m_fn != 0))
{
- wxEvtHandler *handler =
-#if !WXWIN_COMPATIBILITY_EVENT_TYPES
- entry->m_eventSink ? entry->m_eventSink
- :
-#endif
- this;
-
+ wxEvtHandler *handler = entry->m_eventSink ? entry->m_eventSink
+ : this;
if ( ProcessEventIfMatches(*entry, handler, event) )
- {
return true;
- }
}
}
return m_clientData;
}
+// A helper func to find an wxEventConnectionRef object
+wxEventConnectionRef* wxEvtHandler::FindRefInTrackerList( wxEvtHandler *eventSink )
+{
+ wxASSERT(eventSink);
+ for( wxTrackerNode *ptn=eventSink->GetFirst(); ptn; ptn=ptn->m_nxt )
+ {
+ // Only want wxEventConnectionRef nodes here
+ if( ptn->GetType()!=wxTrackerNode::EventConnectionRef )
+ continue;
+ wxEventConnectionRef *pecr = static_cast<wxEventConnectionRef*>(ptn);
+ if( pecr && pecr->m_src==this )
+ {
+ wxASSERT( pecr->m_sink==eventSink );
+ return pecr;
+ }
+ }
+ return NULL;
+}
+
+void wxEvtHandler::OnSinkDestroyed( wxEvtHandler *sink )
+{
+ wxASSERT(m_dynamicEvents);
+
+ // remove all connections with this sink
+ wxList::compatibility_iterator node = m_dynamicEvents->GetFirst(), node_nxt;
+ while (node)
+ {
+ wxDynamicEventTableEntry *entry = (wxDynamicEventTableEntry*)node->GetData();
+ node_nxt = node->GetNext();
+
+ if( entry->m_eventSink==sink )
+ {
+ if (entry->m_callbackUserData)
+ delete entry->m_callbackUserData;
+ m_dynamicEvents->Erase( node );
+ delete entry;
+ }
+ node = node_nxt;
+ }
+}
+
#endif // wxUSE_BASE
#if wxUSE_GUI
projects / wxWidgets.git / blobdiff