// Brian O'Keefe (zer0keefie@gmail.com)
//
-#if NET_4_0
using System.Collections.Specialized;
using System.Runtime.CompilerServices;
[assembly:TypeForwardedTo (typeof (NotifyCollectionChangedEventArgs))]
-#else
-
-namespace System.Collections.Specialized {
- 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 index)
- {
- 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 = index;
- newIndex = index;
- }
-
- 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
projects / mono.git / blobdiff