class/System.Windows/System.ComponentModel/SortDescriptionCollection.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2008 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Chris Toshok (toshok@ximian.com)
  24 //      Brian O'Keefe (zer0keefie@gmail.com)
  25 //
  26
  27 using System;
  28 using System.Collections.ObjectModel;
  29 using System.Collections.Specialized;
  30
  31 namespace System.ComponentModel {
  32
  33         public class SortDescriptionCollection : Collection<SortDescription>, INotifyCollectionChanged
  34         {
  35                 public static readonly SortDescriptionCollection Empty = new SortDescriptionCollection ();
  36
  37                 public SortDescriptionCollection ()
  38                 {
  39                 }
  40
  41                 event NotifyCollectionChangedEventHandler INotifyCollectionChanged.CollectionChanged {
  42                         add { CollectionChanged += value; }
  43                         remove { CollectionChanged -= value; }
  44                 }
  45
  46                 protected event NotifyCollectionChangedEventHandler CollectionChanged;
  47
  48                 protected override void ClearItems ()
  49                 {
  50                         base.ClearItems ();
  51                         OnCollectionChanged (NotifyCollectionChangedAction.Reset);
  52                 }
  53
  54                 protected override void InsertItem (int index, SortDescription item)
  55                 {
  56                         item.Seal ();
  57                         base.InsertItem (index, item);
  58                         OnCollectionChanged (NotifyCollectionChangedAction.Add, item, index);
  59                 }
  60
  61                 protected override void RemoveItem (int index)
  62                 {
  63                         SortDescription sd = base [index];
  64                         base.RemoveItem (index);
  65                         OnCollectionChanged (NotifyCollectionChangedAction.Remove, sd, index);
  66                 }
  67
  68                 protected override void SetItem (int index, SortDescription item)
  69                 {
  70                         SortDescription old = base [index];
  71                         item.Seal ();
  72                         base.SetItem (index, item);
  73                         OnCollectionChanged (NotifyCollectionChangedAction.Remove, old, index);
  74                         OnCollectionChanged (NotifyCollectionChangedAction.Add, item, index);
  75                 }
  76
  77                 private void OnCollectionChanged (NotifyCollectionChangedAction action)
  78                 {
  79                         NotifyCollectionChangedEventHandler eh = CollectionChanged;
  80
  81                         if (eh != null)
  82                                 eh (this, new NotifyCollectionChangedEventArgs (action));
  83                 }
  84
  85                 private void OnCollectionChanged (NotifyCollectionChangedAction action, SortDescription item, int index)
  86                 {
  87                         NotifyCollectionChangedEventHandler eh = CollectionChanged;
  88
  89                         if (eh != null)
  90                                 eh (this, new NotifyCollectionChangedEventArgs (action, item, index));
  91                 }
  92         }
  93
  94 }
  95