// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2007 Novell, Inc. (http://www.novell.com)
//
// Authors:
// Chris Toshok (toshok@ximian.com)
//
using System;
using System.Windows;
namespace System.Collections.Specialized{
public class CollectionChangedEventManager : WeakEventManager
{
internal CollectionChangedEventManager ()
{
}
public static void AddListener (INotifyCollectionChanged source, IWeakEventListener listener)
{
CurrentManager.ProtectedAddListener (source, listener);
}
public static void RemoveListener (INotifyCollectionChanged source, IWeakEventListener listener)
{
CurrentManager.ProtectedAddListener (source, listener);
}
protected override void StartListening (object source)
{
INotifyCollectionChanged inotify = (INotifyCollectionChanged) source;
inotify.CollectionChanged += OnCollectionChanged;
}
protected override void StopListening (object source)
{
INotifyCollectionChanged inotify = (INotifyCollectionChanged) source;
inotify.CollectionChanged -= OnCollectionChanged;
}
private void OnCollectionChanged (object sender, NotifyCollectionChangedEventArgs e)
{
DeliverEvent (sender, e);
}
private static object CurrentManagerLock = new object ();
private static CollectionChangedEventManager CurrentManager {
get {
lock (CurrentManagerLock) {
CollectionChangedEventManager manager = (CollectionChangedEventManager)GetCurrentManager (typeof (CollectionChangedEventManager));
if (manager == null) {
manager = new CollectionChangedEventManager ();
SetCurrentManager (typeof (CollectionChangedEventManager), manager);
}
return manager;
}
}
}
}
}
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