private void RemoveListener(object source, PropertyDescriptor pd, IWeakEventListener listener, EventHandler <ValueChangedEventArgs> handler)
{
using (WriteLock)
{
HybridDictionary dict = (HybridDictionary)this[source];
if (dict != null)
{
ValueChangedRecord record = (ValueChangedRecord)dict[pd];
if (record != null)
{
// remove a listener from the list
record.Remove(listener, handler);
// when the last listener goes away, remove the list
if (record.IsEmpty)
{
dict.Remove(pd);
}
}
if (dict.Count == 0)
{
Remove(source);
}
}
}
}
/// <summary>
/// Remove a listener to the named property (empty means "any property")</summary>
/// <param name="source">Source of the event</param>
/// <param name="listener">The listener to remove</param>
/// <param name="pd">Property descriptor for the value</param>
private void PrivateRemoveListener(object source, IWeakEventListener listener, PropertyDescriptor pd)
{
Debug.Assert(listener != null && source != null && pd != null,
"Listener, source, and pd of event cannot be null");
using (WriteLock)
{
HybridDictionary dict = (HybridDictionary)this[source];
if (dict != null)
{
ValueChangedRecord record = (ValueChangedRecord)dict[pd];
if (record != null)
{
// remove a listener from the list
record.Remove(listener);
// when the last listener goes away, remove the list
if (record.IsEmpty)
{
dict.Remove(pd);
}
}
if (dict.Count == 0)
{
Remove(source);
}
}
}
}