//
// NotifyCollectionChangedEventArgs.cs
//
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// Moonlight List (moonlight-list@lists.ximian.com)
//
// Copyright 2008 Novell, Inc.
//
// 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.
//
using System.Collections.Generic;
namespace System.Collections.Specialized{
public sealed class NotifyCollectionChangedEventArgs : EventArgs {
List<object> new_items, old_items;
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action)
{
if (action != NotifyCollectionChangedAction.Reset)
throw new NotSupportedException ();
Action = action;
NewStartingIndex = -1;
OldStartingIndex = -1;
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object changedItem, int index)
{
switch (action) {
case NotifyCollectionChangedAction.Add:
new_items = new List<object>();
new_items.Add (changedItem);
NewStartingIndex = index;
OldStartingIndex = -1;
break;
case NotifyCollectionChangedAction.Remove:
old_items = new List<object>();
old_items.Add (changedItem);
OldStartingIndex = index;
NewStartingIndex = -1;
break;
default:
throw new NotSupportedException ();
}
Action = action;
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object newItem, object oldItem, int index)
{
if (action != NotifyCollectionChangedAction.Replace)
throw new NotSupportedException ();
Action = action;
new_items = new List<object>();
new_items.Add (newItem);
old_items = new List<object>();
old_items.Add (oldItem);
NewStartingIndex = index;
OldStartingIndex = -1;
}
public NotifyCollectionChangedAction Action { get; private set; }
public IList NewItems {
get { return new_items; }
}
public IList OldItems {
get { return old_items; }
}
public int NewStartingIndex { get; private set; }
public int OldStartingIndex { get; private set; }
}
}
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