mono/mcs/class/WindowsBase/System.Collections.ObjectModel/ReadOnlyObservableCollection.cs

// 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 ([email protected])
//	Brian O'Keefe ([email protected])
//

using System.Collections.Specialized;
using System.ComponentModel;

namespace System.Collections.ObjectModel {
	public class ReadOnlyObservableCollection<T> : ReadOnlyCollection<T>, INotifyCollectionChanged, INotifyPropertyChanged {
		
		public ReadOnlyObservableCollection(ObservableCollection<T> list)
			: base (list)
		{
			((INotifyPropertyChanged)list).PropertyChanged += SourceCollection_PropertyChanged;
			((INotifyCollectionChanged)list).CollectionChanged += SourceCollection_CollectionChanged;
		}

		protected virtual event NotifyCollectionChangedEventHandler CollectionChanged;

		protected virtual event PropertyChangedEventHandler PropertyChanged;

		event NotifyCollectionChangedEventHandler INotifyCollectionChanged.CollectionChanged {
			add { this.CollectionChanged += value; }
			remove { this.CollectionChanged -= value; }
		}

		event PropertyChangedEventHandler INotifyPropertyChanged.PropertyChanged {
			add { this.PropertyChanged += value; }
			remove { this.PropertyChanged -= value; }
		}

		protected virtual void OnCollectionChanged (NotifyCollectionChangedEventArgs args)
		{
			NotifyCollectionChangedEventHandler eh = CollectionChanged;

			if (eh != null)
				eh (this, args);
		}

		protected virtual void OnPropertyChanged (PropertyChangedEventArgs args)
		{
			PropertyChangedEventHandler eh = PropertyChanged;

			if (eh != null)
				eh (this, args);
		}

		private void SourceCollection_CollectionChanged (object sender, NotifyCollectionChangedEventArgs e)
		{
			OnCollectionChanged (e);
		}

		private void SourceCollection_PropertyChanged (object sender, PropertyChangedEventArgs e)
		{
			OnPropertyChanged (e);
		}
	}

}