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

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   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) 2007 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Authors:
  23 //      Chris Toshok (toshok@novell.com)
  24 //      Brian O'Keefe (zer0keefie@gmail.com)
  25 //
  26
  27 using System.Collections.Specialized;
  28 using System.ComponentModel;
  29
  30 namespace System.Collections.ObjectModel {
  31         public class ReadOnlyObservableCollection<T> : ReadOnlyCollection<T>, INotifyCollectionChanged, INotifyPropertyChanged {
  32
  33                 public ReadOnlyObservableCollection(ObservableCollection<T> list)
  34                         : base (list)
  35                 {
  36                         ((INotifyPropertyChanged)list).PropertyChanged += SourceCollection_PropertyChanged;
  37                         ((INotifyCollectionChanged)list).CollectionChanged += SourceCollection_CollectionChanged;
  38                 }
  39
  40                 protected virtual event NotifyCollectionChangedEventHandler CollectionChanged;
  41
  42                 protected virtual event PropertyChangedEventHandler PropertyChanged;
  43
  44                 event NotifyCollectionChangedEventHandler INotifyCollectionChanged.CollectionChanged {
  45                         add { this.CollectionChanged += value; }
  46                         remove { this.CollectionChanged -= value; }
  47                 }
  48
  49                 event PropertyChangedEventHandler INotifyPropertyChanged.PropertyChanged {
  50                         add { this.PropertyChanged += value; }
  51                         remove { this.PropertyChanged -= value; }
  52                 }
  53
  54                 protected virtual void OnCollectionChanged (NotifyCollectionChangedEventArgs args)
  55                 {
  56                         NotifyCollectionChangedEventHandler eh = CollectionChanged;
  57
  58                         if (eh != null)
  59                                 eh (this, args);
  60                 }
  61
  62                 protected virtual void OnPropertyChanged (PropertyChangedEventArgs args)
  63                 {
  64                         PropertyChangedEventHandler eh = PropertyChanged;
  65
  66                         if (eh != null)
  67                                 eh (this, args);
  68                 }
  69
  70                 private void SourceCollection_CollectionChanged (object sender, NotifyCollectionChangedEventArgs e)
  71                 {
  72                         OnCollectionChanged (e);
  73                 }
  74
  75                 private void SourceCollection_PropertyChanged (object sender, PropertyChangedEventArgs e)
  76                 {
  77                         OnPropertyChanged (e);
  78                 }
  79         }
  80
  81 }