/Branches/0.9.5-DeltaShell/src/Common/DelftTools.Utils/Threading/ThreadsafeBindingList.cs

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Threading;



namespace DelftTools.Utils.Threading

{

    /// <summary>

    /// Provides a thread-safe binding-list by using the synchronizationcontext where the list was created.

    /// HACK: Probably not full-proof.  

    /// Copied from: http://groups.google.co.uk/group/microsoft.public.dotnet.languages.csharp/msg/f12a3c5980567f06

    /// List should be created in a forms control providing a synchronization context

    /// More about synchronizationcontext here: http://www.codeproject.com/KB/cpp/SyncContextTutorial.aspx

    /// </summary>

    /// <typeparam name="T"></typeparam>

    public class ThreadsafeBindingList<T> : BindingList<T>

    {

        private readonly SynchronizationContext synchronizationContext;

            

        protected override void OnAddingNew(AddingNewEventArgs e)

        {

            synchronizationContext.Send(delegate { BaseAddingNew(e); }, null);

        }



        

        void BaseAddingNew(AddingNewEventArgs e)

        {

            base.OnAddingNew(e);

        }



        protected override void OnListChanged(ListChangedEventArgs e)

        {

            synchronizationContext.Send(

                delegate { BaseListChanged(e); }, null);

        }



        void BaseListChanged(ListChangedEventArgs e)

        {

            base.OnListChanged(e);

        }



        /// <summary>

        /// Creates a bindinglist using the givin synchronization context

        /// </summary>

        public ThreadsafeBindingList(SynchronizationContext context)

        {

            synchronizationContext = context;

            //for now this class can only be used in synchronization context

            if (synchronizationContext == null)

                throw new InvalidOperationException("Unable to create a threadsafe bindinglist without a synchronization context");

        }



        public ThreadsafeBindingList(SynchronizationContext context, IList<T> list)

            : base(list)

        {

            synchronizationContext = context;

            //for now this class can only be used in synchronization contexts

            if (synchronizationContext == null)

                throw new InvalidOperationException("Unable to create a threadsafe bindinglist without a synchronization context");

        }

    }

}