/source/library/Interlace/Utilities/PropertyEventMap.cs

#region Using Directives and Copyright Notice



// Copyright (c) 2007-2010, Computer Consultancy Pty Ltd

// All rights reserved.

// 

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are met:

//     * Redistributions of source code must retain the above copyright

//       notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above copyright

//       notice, this list of conditions and the following disclaimer in the

//       documentation and/or other materials provided with the distribution.

//     * Neither the name of the Computer Consultancy Pty Ltd nor the

//       names of its contributors may be used to endorse or promote products

//       derived from this software without specific prior written permission.

// 

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 

// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 

// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 

// ARE DISCLAIMED. IN NO EVENT SHALL COMPUTER CONSULTANCY PTY LTD BE LIABLE 

// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 

// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 

// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 

// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 

// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 

// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH

// DAMAGE.



using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Text;



#endregion



namespace Interlace.Utilities

{

    public delegate void PropertyEventFireDelegate(string propertyName);



    public class PropertyEventMap

    {

        readonly Dictionary<string, List<string>> _propertyNameMap;



        public PropertyEventMap()

        {

            _propertyNameMap = new Dictionary<string, List<string>>();

        }



        public void Map(string sourceProperty)

        {

            InternalMap(sourceProperty, sourceProperty, null);

        }



        public void Map(string sourceProperty, string destinationProperty)

        {

            InternalMap(sourceProperty, destinationProperty, null);

        }



        public void Map(string sourceProperty, string destinationProperty, params string[] otherDestinationProperties)

        {

            InternalMap(sourceProperty, destinationProperty, otherDestinationProperties);

        }



        void InternalMap(string sourceProperty, string destinationProperty, string[] otherDestinationProperties)

        {

            if (!_propertyNameMap.ContainsKey(sourceProperty))

            {

                _propertyNameMap[sourceProperty] = 

                    new List<string>(1 + (otherDestinationProperties != null ? otherDestinationProperties.Length : 0));

            }



            _propertyNameMap[sourceProperty].Add(destinationProperty);

            if (otherDestinationProperties != null) _propertyNameMap[sourceProperty].AddRange(otherDestinationProperties);

        }



        public void ConnectEvents(PropertyEventFireDelegate fire, INotifyPropertyChanged source)

        {

            source.PropertyChanged += new PropertyChangedEventHandler(

                delegate(object sender, PropertyChangedEventArgs e)

                {

                    List<string> destinationProperties;

                    

                    if (_propertyNameMap.TryGetValue(e.PropertyName, out destinationProperties))

                    {

                        foreach (string propertyName in destinationProperties)

                        {

                            fire(propertyName);

                        }

                    }

                });

        }

    }

}