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// 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)
// Brian O'Keefe (zer0keefie@gmail.com)
//
#if NET_4_0
using System.Runtime.CompilerServices;
namespace System.Collections.Specialized
{
#if !MOBILE
[TypeForwardedFrom (Consts.WindowsBase_3_0)]
#endif
public class NotifyCollectionChangedEventArgs : EventArgs
{
private NotifyCollectionChangedAction action;
private IList oldItems, newItems;
private int oldIndex = -1, newIndex = -1;
#region Constructors
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action)
{
this.action = action;
if (action != NotifyCollectionChangedAction.Reset)
throw new ArgumentException ("This constructor can only be used with the Reset action.", "action");
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, IList changedItems)
: this (action, changedItems, -1)
{
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object changedItem)
: this (action, changedItem, -1)
{
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, IList newItems, IList oldItems)
: this (action, newItems, oldItems, -1)
{
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, IList changedItems, int startingIndex)
{
this.action = action;
if (action == NotifyCollectionChangedAction.Add || action == NotifyCollectionChangedAction.Remove) {
if (changedItems == null)
throw new ArgumentNullException ("changedItems");
if (startingIndex < -1)
throw new ArgumentException ("The value of startingIndex must be -1 or greater.", "startingIndex");
if (action == NotifyCollectionChangedAction.Add)
InitializeAdd (changedItems, startingIndex);
else
InitializeRemove (changedItems, startingIndex);
} else if (action == NotifyCollectionChangedAction.Reset) {
if (changedItems != null)
throw new ArgumentException ("This constructor can only be used with the Reset action if changedItems is null", "changedItems");
if (startingIndex != -1)
throw new ArgumentException ("This constructor can only be used with the Reset action if startingIndex is -1", "startingIndex");
} else {
throw new ArgumentException ("This constructor can only be used with the Reset, Add, or Remove actions.", "action");
}
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object changedItem, int index)
{
IList changedItems = new object [] { changedItem };
this.action = action;
if (action == NotifyCollectionChangedAction.Add)
InitializeAdd (changedItems, index);
else if (action == NotifyCollectionChangedAction.Remove)
InitializeRemove (changedItems, index);
else if (action == NotifyCollectionChangedAction.Reset) {
if (changedItem != null)
throw new ArgumentException ("This constructor can only be used with the Reset action if changedItem is null", "changedItem");
if (index != -1)
throw new ArgumentException ("This constructor can only be used with the Reset action if index is -1", "index");
} else {
throw new ArgumentException ("This constructor can only be used with the Reset, Add, or Remove actions.", "action");
}
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object newItem, object oldItem)
: this (action, newItem, oldItem, -1)
{
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, IList newItems, IList oldItems, int startingIndex)
{
this.action = action;
if (action != NotifyCollectionChangedAction.Replace)
throw new ArgumentException ("This constructor can only be used with the Replace action.", "action");
if (newItems == null)
throw new ArgumentNullException ("newItems");
if (oldItems == null)
throw new ArgumentNullException ("oldItems");
this.oldItems = oldItems;
this.newItems = newItems;
oldIndex = startingIndex;
newIndex = startingIndex;
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, IList changedItems, int index, int oldIndex)
{
this.action = action;
if (action != NotifyCollectionChangedAction.Move)
throw new ArgumentException ("This constructor can only be used with the Move action.", "action");
if (index < -1)
throw new ArgumentException ("The value of index must be -1 or greater.", "index");
InitializeMove (changedItems, index, oldIndex);
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object changedItem, int index, int oldIndex)
: this (action, new object [] { changedItem }, index, oldIndex)
{
}
public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object newItem, object oldItem, int index)
{
this.action = action;
if (action != NotifyCollectionChangedAction.Replace)
throw new ArgumentException ("This constructor can only be used with the Replace action.", "action");
InitializeReplace (new object [] { newItem }, new object [] { oldItem }, index);
}
#endregion
#region Accessor Properties
public NotifyCollectionChangedAction Action {
get { return action; }
}
public IList NewItems {
get { return newItems; }
}
public int NewStartingIndex {
get { return newIndex; }
}
public IList OldItems {
get { return oldItems; }
}
public int OldStartingIndex {
get { return oldIndex; }
}
#endregion
#region Initialize Methods
private void InitializeAdd(IList items, int index)
{
this.newItems = ArrayList.ReadOnly (items);
this.newIndex = index;
}
private void InitializeRemove(IList items, int index)
{
this.oldItems = ArrayList.ReadOnly (items);
this.oldIndex = index;
}
private void InitializeMove(IList changedItems, int newItemIndex, int oldItemIndex)
{
InitializeAdd (changedItems, newItemIndex);
InitializeRemove (changedItems, oldItemIndex);
}
private void InitializeReplace(IList addedItems, IList removedItems, int index)
{
InitializeAdd (addedItems, index);
InitializeRemove (removedItems, index);
}
#endregion
}
}
#endif
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