ObservableQueue.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel;

namespace PlexWalk
{
    public class ObservableQueue<T> : INotifyCollectionChanged, IEnumerable<T>, IListSource
    {
        public event NotifyCollectionChangedEventHandler CollectionChanged;
        public BindingList<T> list = new BindingList<T>();

        public void Enqueue(T item)
        {
            list.Add(item);
            if (CollectionChanged != null)
                CollectionChanged(this,
                    new NotifyCollectionChangedEventArgs(
                        NotifyCollectionChangedAction.Add, item));
        }

        public T Dequeue()
        {
            var item = list[0];
            list.RemoveAt(0);
            if (CollectionChanged != null)
                CollectionChanged(this,
                    new NotifyCollectionChangedEventArgs(
                        NotifyCollectionChangedAction.Remove, item));
            return item;
        }

        public IEnumerator<T> GetEnumerator()
        {
            return list.GetEnumerator();
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            return GetEnumerator();
        }

        public int IndexOf(T item)
        {
            return list.IndexOf(item);
        }

        public void Insert(int index, T item)
        {
            throw new NotImplementedException();
        }

        public void RemoveAt(int index)
        {
            var item = list[index];
            list.RemoveAt(index);
            if (CollectionChanged != null)
                CollectionChanged(this,
                    new NotifyCollectionChangedEventArgs(
                        NotifyCollectionChangedAction.Remove, item));
        }

        public T this[int index]
        {
            get
            {
                return this.list[index];
            }
            set
            {
                this.list[index] = value;
            }
        }

        public void Add(T item)
        {
            this.Enqueue(item);
        }

        public void Clear()
        {
            list.Clear();
        }

        public bool Contains(T item)
        {
            return this.list.Contains(item);
        }

        public void CopyTo(T[] array, int arrayIndex)
        {
            list.CopyTo(array, arrayIndex);
        }

        public int Count
        {
            get
            {
                return list.Count();
            }
        }

        public bool IsReadOnly
        {
            get
            {
                return true;
            }
        }

        public bool Remove(T item)
        {
            bool result = this.list.Remove(item);
            if (CollectionChanged != null)
                CollectionChanged(this,
                    new NotifyCollectionChangedEventArgs(
                        NotifyCollectionChangedAction.Remove, item));
            return result;
        }

        public bool ContainsListCollection
        {
            get { throw new NotImplementedException(); }
        }

        public IList GetList()
        {
            return this.list;
        }
    }
}