1using System;
 2using System.Collections.ObjectModel;
 3using System.Collections.Specialized;
 4
 5namespace solidware.financials.windows.ui.views.controls
 6{
 7    public class SmartCollection<T> : ObservableCollection<T>
 8    {
 9        bool suspend;
10
11        public SmartCollection()
12        {
13            suspend = false;
14        }
15
16        protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
17        {
18            if (!suspend) base.OnCollectionChanged(e);
19        }
20
21        public IDisposable BeginEdit()
22        {
23            return new SuspendNotifications<T>(this);
24        }
25
26        class SuspendNotifications<K> : IDisposable
27        {
28            readonly SmartCollection<K> items;
29
30            public SuspendNotifications(SmartCollection<K> items)
31            {
32                this.items = items;
33                items.suspend = true;
34            }
35
36            public void Dispose()
37            {
38                items.suspend = false;
39                items.OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
40            }
41        }
42    }
43}