+#if wxUSE_WEAKREF
+// 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
+ 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_WEAKREF
+