4C/GummingCommon/Utilities/ViewProperty.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections.ObjectModel;

namespace GummingCommon
{
    public class ViewProperty<T>
    {
        private T _value;
        public ViewProperty(T defaultValue = default(T))
        {
            _value = defaultValue;
        }

        public T Value
        {
            get { return _value; }
            set
            {
                _value = value;
                var handler = ValueChanged;
                if (handler != null)
                    handler();
            }
        }

        public event Action ValueChanged; 
    }

    public class ViewCollectionProperty<T>
    {
        private readonly MyObservableCollection<T> _collection;
        public ViewCollectionProperty()
        {
            _collection = new MyObservableCollection<T>(_collection_CollectionChanged);
        }

        public ICollection<T> Collection { get { return _collection; } }

        public event Action CollectionChanged;

        private void _collection_CollectionChanged()
        {
            if (CollectionChanged != null)
                CollectionChanged();
        }


        private class MyObservableCollection<T2> : ObservableCollection<T2>
        {
            private readonly Action _onCollectionChanged;   
            public MyObservableCollection(Action onCollectionChanged) : base()
            {
                _onCollectionChanged = onCollectionChanged;
            }

            protected override void OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
            {
                _onCollectionChanged();
            }
        }
    }
}