--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Chronosv2/source/Presentation/ViewModel/CollectionViewModel.cs	Tue Feb 21 17:25:44 2012 +0700
@@ -0,0 +1,570 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.Linq;
+using Chronos.Extensions;
+using Chronos.Presentation.Core.ViewModel;
+
+namespace Chronos.Presentation.ViewModel
+{
+    /// <summary>
+    /// ViewModel Collection
+    /// </summary>
+    /// <typeparam name="TSource">The type of the source.</typeparam>
+    /// <typeparam name="TTarget">The type of the target.</typeparam>
+    public class CollectionViewModel<TSource, TTarget>
+        : IList<TTarget>, ICollection<TTarget>, IEnumerable<TTarget>, ICollectionItemChanged<TSource, TTarget>, IList, ICollection, IEnumerable, INotifyCollectionChanged, IDisposable
+        where TSource: INotifyPropertyChanged
+        where TTarget: INotifyPropertyChanged
+    {
+        #region · Events ·
+        
+        public event NotifyCollectionChangedEventHandler                    CollectionChanged;
+        public event EventHandler<ItemChangedEventArgs<TSource, TTarget>>   ItemChanged;
+        
+        #endregion
+        
+        #region · Fields ·
+
+        private bool                            disposed;
+        private ObservableCollection<TSource>   sourceCollection;
+        private ObservableCollection<TTarget>   items;
+        private readonly Func<TSource, TTarget> setup;
+        private readonly Func<TTarget, TSource> coerce;
+        private readonly Action<TTarget>        teardown;
+
+        #endregion
+
+        #region · Protected Properties ·
+        
+        /// <summary>
+        /// Gets the list of target items
+        /// </summary>
+        protected ObservableCollection<TTarget> Items
+        {
+            get 
+            {  
+                if (this.items == null)
+                {
+                    this.items = new ObservableCollection<TTarget>();
+                }
+
+                return this.items;
+            }
+        }
+
+        #endregion
+
+        #region · Constructors ·
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CollectionViewModel&lt;TSource, TTarget&gt;"/> class.
+        /// </summary>
+        /// <param name="sourceCollection">The source collection.</param>
+        /// <param name="setup">The setup function.</param>
+        /// <param name="coerce">The coerce function.</param>
+        /// <param name="teardown">The teardown function.</param>
+        public CollectionViewModel(
+            ObservableCollection<TSource> sourceCollection, Func<TSource, TTarget> setup, Func<TTarget, TSource> coerce, Action<TTarget> teardown = null)
+        {
+            this.setup              = setup;
+            this.coerce             = coerce;
+            this.teardown           = teardown;
+            this.sourceCollection   = sourceCollection;
+
+            List<TTarget> targetItems = new List<TTarget>(sourceCollection.Select(setup));
+
+            targetItems.ForEach(i => i.PropertyChanged += (x, y) => this.NotifyItemChanged(this.coerce(i), i));
+
+            this.Items.AddRange(targetItems);
+        
+            var notifyCollectionChanged = this.Items as INotifyCollectionChanged;
+            
+            if (notifyCollectionChanged != null)
+            {
+                notifyCollectionChanged.CollectionChanged += this.OnSourceCollectionChanged;
+            }
+        }
+
+        #endregion
+
+        #region · IDisposable Members ·
+
+        /// <summary>
+        /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
+        /// </summary>
+        public void Dispose()
+        {
+            this.Dispose(true);
+        }
+
+        /// <summary>
+        /// Releases unmanaged and - optionally - managed resources
+        /// </summary>
+        /// <param name="disposing"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
+        protected virtual void Dispose(bool disposing)
+        {
+            if (!this.disposed)
+            {
+                if (disposing)
+                {
+                    // Cleanup managed resources
+                    this.Clear();
+
+                    var notifyCollectionChanged = this.sourceCollection as INotifyCollectionChanged;
+
+                    if (notifyCollectionChanged != null)
+                    {
+                        notifyCollectionChanged.CollectionChanged -= this.OnSourceCollectionChanged;
+                    }
+                }
+
+                // Cleanup unmanaged resources
+
+                // Mark the object as disposed
+                this.disposed = true;
+            }
+        }
+
+        #endregion
+
+        #region · IList<TTarget> Members ·
+
+        /// <summary>
+        /// Gets or sets the <see cref="TTarget"/> at the specified index.
+        /// </summary>
+        /// <value></value>
+        public TTarget this[int index]
+        {
+            get { return this.Items[index]; }
+            set { this.Items[index] = value; }
+        }
+
+        /// <summary>
+        /// Gets the number of elements contained in the <see cref="T:System.Collections.Generic.ICollection`1"/>.
+        /// </summary>
+        /// <value></value>
+        /// <returns>
+        /// The number of elements contained in the <see cref="T:System.Collections.Generic.ICollection`1"/>.
+        /// </returns>
+        public int Count
+        {
+            get { return this.Items.Count; }
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether the <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only.
+        /// </summary>
+        /// <value></value>
+        /// <returns>true if the <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only; otherwise, false.
+        /// </returns>
+        public bool IsReadOnly
+        {
+            get { return false; }
+        }
+
+        /// <summary>
+        /// Determines whether the <see cref="T:System.Collections.Generic.ICollection`1"/> contains a specific value.
+        /// </summary>
+        /// <param name="item">The object to locate in the <see cref="T:System.Collections.Generic.ICollection`1"/>.</param>
+        /// <returns>
+        /// true if <paramref name="item"/> is found in the <see cref="T:System.Collections.Generic.ICollection`1"/>; otherwise, false.
+        /// </returns>
+        public bool Contains(TTarget item)
+        {
+            return this.Items.Contains(item);
+        }
+
+        /// <summary>
+        /// Adds an item to the <see cref="T:System.Collections.Generic.ICollection`1"/>.
+        /// </summary>
+        /// <param name="item">The object to add to the <see cref="T:System.Collections.Generic.ICollection`1"/>.</param>
+        /// <exception cref="T:System.NotSupportedException">
+        /// The <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only.
+        /// </exception>
+        public void Add(TTarget item)
+        {
+            TSource source = this.coerce(item);
+
+            item.PropertyChanged += (x, y) => this.NotifyItemChanged(source, item);
+
+            this.sourceCollection.Add(source);
+            this.Items.Add(item);
+        }
+
+        /// <summary>
+        /// Inserts an item to the <see cref="T:System.Collections.Generic.IList`1"/> at the specified index.
+        /// </summary>
+        /// <param name="index">The zero-based index at which <paramref name="item"/> should be inserted.</param>
+        /// <param name="item">The object to insert into the <see cref="T:System.Collections.Generic.IList`1"/>.</param>
+        /// <exception cref="T:System.ArgumentOutOfRangeException">
+        /// 	<paramref name="index"/> is not a valid index in the <see cref="T:System.Collections.Generic.IList`1"/>.
+        /// </exception>
+        /// <exception cref="T:System.NotSupportedException">
+        /// The <see cref="T:System.Collections.Generic.IList`1"/> is read-only.
+        /// </exception>
+        public void Insert(int index, TTarget item)
+        {
+            TSource source = this.coerce(item);
+
+            item.PropertyChanged += (x, y) => this.NotifyItemChanged(source, item);
+
+            this.sourceCollection.Insert(index, source);
+            this.Items.Insert(index, item);
+        }
+
+        /// <summary>
+        /// Determines the index of a specific item in the <see cref="T:System.Collections.Generic.IList`1"/>.
+        /// </summary>
+        /// <param name="item">The object to locate in the <see cref="T:System.Collections.Generic.IList`1"/>.</param>
+        /// <returns>
+        /// The index of <paramref name="item"/> if found in the list; otherwise, -1.
+        /// </returns>
+        public int IndexOf(TTarget item)
+        {
+            return this.Items.IndexOf(item);
+        }
+
+        /// <summary>
+        /// Removes the first occurrence of a specific object from the <see cref="T:System.Collections.Generic.ICollection`1"/>.
+        /// </summary>
+        /// <param name="item">The object to remove from the <see cref="T:System.Collections.Generic.ICollection`1"/>.</param>
+        /// <returns>
+        /// true if <paramref name="item"/> was successfully removed from the <see cref="T:System.Collections.Generic.ICollection`1"/>; otherwise, false. This method also returns false if <paramref name="item"/> is not found in the original <see cref="T:System.Collections.Generic.ICollection`1"/>.
+        /// </returns>
+        /// <exception cref="T:System.NotSupportedException">
+        /// The <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only.
+        /// </exception>
+        public bool Remove(TTarget item)
+        {
+            if (this.teardown != null)
+            {
+                this.teardown(item);
+            }
+
+            item.PropertyChanged -= (x, y) => this.NotifyItemChanged(this.coerce(item), item);
+
+            this.Items.Remove(item);
+            this.sourceCollection.Remove(this.coerce(item));
+
+            return true;
+        }
+
+        /// <summary>
+        /// Removes the <see cref="T:System.Collections.Generic.IList`1"/> item at the specified index.
+        /// </summary>
+        /// <param name="index">The zero-based index of the item to remove.</param>
+        /// <exception cref="T:System.ArgumentOutOfRangeException">
+        /// 	<paramref name="index"/> is not a valid index in the <see cref="T:System.Collections.Generic.IList`1"/>.
+        /// </exception>
+        /// <exception cref="T:System.NotSupportedException">
+        /// The <see cref="T:System.Collections.Generic.IList`1"/> is read-only.
+        /// </exception>
+        public void RemoveAt(int index)
+        {
+            if (this.teardown != null)
+            {
+                this.teardown(this.Items[index]);
+            }
+
+            TTarget target = this[index];
+
+            target.PropertyChanged -= (x, y) => this.NotifyItemChanged(this.coerce(target), target);
+
+            this.Items.RemoveAt(index);
+            this.sourceCollection.RemoveAt(index);
+        }
+
+        /// <summary>
+        /// Removes all items from the <see cref="T:System.Collections.Generic.ICollection`1"/>.
+        /// </summary>
+        /// <exception cref="T:System.NotSupportedException">
+        /// The <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only.
+        /// </exception>
+        public void Clear()
+        {
+            if (this.teardown != null)
+            {
+                this.Items.ForEach(target => this.teardown(target));
+            }
+
+            this.Items.ForEach(target => target.PropertyChanged -= (x, y) => this.NotifyItemChanged(this.coerce(target), target));
+            
+            this.sourceCollection.Clear();
+            this.Items.Clear();
+        }
+
+        /// <summary>
+        /// Returns an enumerator that iterates through the collection.
+        /// </summary>
+        /// <returns>
+        /// A <see cref="T:System.Collections.Generic.IEnumerator`1"/> that can be used to iterate through the collection.
+        /// </returns>
+        public IEnumerator<TTarget> GetEnumerator()
+        {
+            return this.Items.GetEnumerator();
+        }
+
+        /// <summary>
+        /// Returns an enumerator that iterates through a collection.
+        /// </summary>
+        /// <returns>
+        /// An <see cref="T:System.Collections.IEnumerator"/> object that can be used to iterate through the collection.
+        /// </returns>
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return this.Items.GetEnumerator();
+        }
+
+        /// <summary>
+        /// Copies the elements of the <see cref="T:System.Collections.Generic.ICollection`1"/> to an <see cref="T:System.Array"/>, starting at a particular <see cref="T:System.Array"/> index.
+        /// </summary>
+        /// <param name="array">The one-dimensional <see cref="T:System.Array"/> that is the destination of the elements copied from <see cref="T:System.Collections.Generic.ICollection`1"/>. The <see cref="T:System.Array"/> must have zero-based indexing.</param>
+        /// <param name="arrayIndex">The zero-based index in <paramref name="array"/> at which copying begins.</param>
+        /// <exception cref="T:System.ArgumentNullException">
+        /// 	<paramref name="array"/> is null.
+        /// </exception>
+        /// <exception cref="T:System.ArgumentOutOfRangeException">
+        /// 	<paramref name="arrayIndex"/> is less than 0.
+        /// </exception>
+        /// <exception cref="T:System.ArgumentException">
+        /// 	<paramref name="array"/> is multidimensional.
+        /// -or-
+        /// <paramref name="arrayIndex"/> is equal to or greater than the length of <paramref name="array"/>.
+        /// -or-
+        /// The number of elements in the source <see cref="T:System.Collections.Generic.ICollection`1"/> is greater than the available space from <paramref name="arrayIndex"/> to the end of the destination <paramref name="array"/>.
+        /// -or-
+        /// Type <paramref name="T"/> cannot be cast automatically to the type of the destination <paramref name="array"/>.
+        /// </exception>
+        void ICollection<TTarget>.CopyTo(TTarget[] array, int arrayIndex)
+        {
+            throw new NotImplementedException();
+        }
+
+        #endregion
+
+        #region · IList Members ·
+
+        /// <summary>
+        /// Adds an item to the <see cref="T:System.Collections.IList"/>.
+        /// </summary>
+        /// <param name="value">The <see cref="T:System.Object"/> to add to the <see cref="T:System.Collections.IList"/>.</param>
+        /// <returns>
+        /// The position into which the new element was inserted.
+        /// </returns>
+        /// <exception cref="T:System.NotSupportedException">
+        /// The <see cref="T:System.Collections.IList"/> is read-only.
+        /// -or-
+        /// The <see cref="T:System.Collections.IList"/> has a fixed size.
+        /// </exception>
+        int IList.Add(object value)
+        {
+            this.Add((TTarget)value);
+
+            return this.IndexOf((TTarget)value);
+        }
+
+        /// <summary>
+        /// Removes all items from the <see cref="T:System.Collections.Generic.ICollection`1"/>.
+        /// </summary>
+        /// <exception cref="T:System.NotSupportedException">
+        /// The <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only.
+        /// </exception>
+        void IList.Clear()
+        {
+            this.Clear();
+        }
+
+        /// <summary>
+        /// Determines whether the <see cref="T:System.Collections.IList"/> contains a specific value.
+        /// </summary>
+        /// <param name="value">The <see cref="T:System.Object"/> to locate in the <see cref="T:System.Collections.IList"/>.</param>
+        /// <returns>
+        /// true if the <see cref="T:System.Object"/> is found in the <see cref="T:System.Collections.IList"/>; otherwise, false.
+        /// </returns>
+        bool IList.Contains(object value)
+        {
+            return this.Contains((TTarget)value);
+        }
+
+        /// <summary>
+        /// Determines the index of a specific item in the <see cref="T:System.Collections.IList"/>.
+        /// </summary>
+        /// <param name="value">The <see cref="T:System.Object"/> to locate in the <see cref="T:System.Collections.IList"/>.</param>
+        /// <returns>
+        /// The index of <paramref name="value"/> if found in the list; otherwise, -1.
+        /// </returns>
+        int IList.IndexOf(object value)
+        {
+            return this.IndexOf((TTarget)value);
+        }
+
+        /// <summary>
+        /// Inserts an item to the <see cref="T:System.Collections.IList"/> at the specified index.
+        /// </summary>
+        /// <param name="index">The zero-based index at which <paramref name="value"/> should be inserted.</param>
+        /// <param name="value">The <see cref="T:System.Object"/> to insert into the <see cref="T:System.Collections.IList"/>.</param>
+        /// <exception cref="T:System.ArgumentOutOfRangeException">
+        /// 	<paramref name="index"/> is not a valid index in the <see cref="T:System.Collections.IList"/>.
+        /// </exception>
+        /// <exception cref="T:System.NotSupportedException">
+        /// The <see cref="T:System.Collections.IList"/> is read-only.
+        /// -or-
+        /// The <see cref="T:System.Collections.IList"/> has a fixed size.
+        /// </exception>
+        /// <exception cref="T:System.NullReferenceException">
+        /// 	<paramref name="value"/> is null reference in the <see cref="T:System.Collections.IList"/>.
+        /// </exception>
+        void IList.Insert(int index, object value)
+        {
+            this.Insert(index, (TTarget)value);
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether the <see cref="T:System.Collections.IList"/> has a fixed size.
+        /// </summary>
+        /// <value></value>
+        /// <returns>true if the <see cref="T:System.Collections.IList"/> has a fixed size; otherwise, false.
+        /// </returns>
+        bool IList.IsFixedSize
+        {
+            get { return false; }
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether the <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only.
+        /// </summary>
+        /// <value></value>
+        /// <returns>true if the <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only; otherwise, false.
+        /// </returns>
+        bool IList.IsReadOnly
+        {
+            get { return false; }
+        }
+
+        /// <summary>
+        /// Removes the first occurrence of a specific object from the <see cref="T:System.Collections.IList"/>.
+        /// </summary>
+        /// <param name="value">The <see cref="T:System.Object"/> to remove from the <see cref="T:System.Collections.IList"/>.</param>
+        /// <exception cref="T:System.NotSupportedException">
+        /// The <see cref="T:System.Collections.IList"/> is read-only.
+        /// -or-
+        /// The <see cref="T:System.Collections.IList"/> has a fixed size.
+        /// </exception>
+        void IList.Remove(object value)
+        {
+            this.Remove((TTarget)value);
+        }
+
+        /// <summary>
+        /// Removes the <see cref="T:System.Collections.Generic.IList`1"/> item at the specified index.
+        /// </summary>
+        /// <param name="index">The zero-based index of the item to remove.</param>
+        /// <exception cref="T:System.ArgumentOutOfRangeException">
+        /// 	<paramref name="index"/> is not a valid index in the <see cref="T:System.Collections.Generic.IList`1"/>.
+        /// </exception>
+        /// <exception cref="T:System.NotSupportedException">
+        /// The <see cref="T:System.Collections.Generic.IList`1"/> is read-only.
+        /// </exception>
+        void IList.RemoveAt(int index)
+        {
+            this.RemoveAt(index);
+        }
+
+        /// <summary>
+        /// Gets or sets the <see cref="System.Object"/> at the specified index.
+        /// </summary>
+        /// <value></value>
+        object IList.this[int index]
+        {
+            get { return this[index]; }
+            set { this[index] = (TTarget)value; }
+        }
+
+        /// <summary>
+        /// Copies the elements of the <see cref="T:System.Collections.ICollection"/> to an <see cref="T:System.Array"/>, starting at a particular <see cref="T:System.Array"/> index.
+        /// </summary>
+        /// <param name="array">The one-dimensional <see cref="T:System.Array"/> that is the destination of the elements copied from <see cref="T:System.Collections.ICollection"/>. The <see cref="T:System.Array"/> must have zero-based indexing.</param>
+        /// <param name="index">The zero-based index in <paramref name="array"/> at which copying begins.</param>
+        /// <exception cref="T:System.ArgumentNullException">
+        /// 	<paramref name="array"/> is null.
+        /// </exception>
+        /// <exception cref="T:System.ArgumentOutOfRangeException">
+        /// 	<paramref name="index"/> is less than zero.
+        /// </exception>
+        /// <exception cref="T:System.ArgumentException">
+        /// 	<paramref name="array"/> is multidimensional.
+        /// -or-
+        /// <paramref name="index"/> is equal to or greater than the length of <paramref name="array"/>.
+        /// -or-
+        /// The number of elements in the source <see cref="T:System.Collections.ICollection"/> is greater than the available space from <paramref name="index"/> to the end of the destination <paramref name="array"/>.
+        /// </exception>
+        /// <exception cref="T:System.ArgumentException">
+        /// The type of the source <see cref="T:System.Collections.ICollection"/> cannot be cast automatically to the type of the destination <paramref name="array"/>.
+        /// </exception>
+        void ICollection.CopyTo(Array array, int index)
+        {
+            throw new NotImplementedException();
+        }
+
+        /// <summary>
+        /// Gets the number of elements contained in the <see cref="T:System.Collections.Generic.ICollection`1"/>.
+        /// </summary>
+        /// <value></value>
+        /// <returns>
+        /// The number of elements contained in the <see cref="T:System.Collections.Generic.ICollection`1"/>.
+        /// </returns>
+        int ICollection.Count
+        {
+            get { return this.Count; }
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether access to the <see cref="T:System.Collections.ICollection"/> is synchronized (thread safe).
+        /// </summary>
+        /// <value></value>
+        /// <returns>true if access to the <see cref="T:System.Collections.ICollection"/> is synchronized (thread safe); otherwise, false.
+        /// </returns>
+        bool ICollection.IsSynchronized
+        {
+            get { return false; }
+        }
+
+        /// <summary>
+        /// Gets an object that can be used to synchronize access to the <see cref="T:System.Collections.ICollection"/>.
+        /// </summary>
+        /// <value></value>
+        /// <returns>
+        /// An object that can be used to synchronize access to the <see cref="T:System.Collections.ICollection"/>.
+        /// </returns>
+        object ICollection.SyncRoot
+        {
+            get { return null; }
+        }
+
+        #endregion
+
+        #region · Change Tracking Methods ·
+
+        private void NotifyItemChanged(TSource source, TTarget target)
+        {
+            if (this.ItemChanged != null)
+            {
+                this.ItemChanged(this, new ItemChangedEventArgs<TSource,TTarget>(source, target));
+            }
+        }
+
+        private void OnSourceCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
+        {
+            if (this.CollectionChanged != null)
+            {
+                this.CollectionChanged(this, e);
+            }
+        }
+
+        #endregion
+    }
+}
\ No newline at end of file