source: extensions/PiwigoLib/PiwigoWpf/DTO/AsyncObservableCollection.cs @ 11935

using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Threading;
using System.Collections.Specialized;
using System.ComponentModel;

namespace Com.Piwigo.Wpf.DTO
{
    public class AsyncObservableCollection<T> : ObservableCollection<T>
    {        

        public AsyncObservableCollection()
        {
        }

        public AsyncObservableCollection(IEnumerable<T> list)
            : base(list)
        {
        }

        protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
        {
            if (SynchronizationContext.Current == PwgModelManager.WPF_SynchronizationContext)
            {
                // Execute the CollectionChanged event on the current thread
                RaiseCollectionChanged(e);
            }
            else
            {
                // Send the CollectionChanged event on the creator thread
                PwgModelManager.WPF_SynchronizationContext.Send(RaiseCollectionChanged, e);
            }
        }

        private void RaiseCollectionChanged(object param)
        {
            // We are in the creator thread, call the base implementation directly
            base.OnCollectionChanged((NotifyCollectionChangedEventArgs)param);
        }

        protected override void OnPropertyChanged(PropertyChangedEventArgs e)
        {
            if (SynchronizationContext.Current == PwgModelManager.WPF_SynchronizationContext)
            {
                // Execute the PropertyChanged event on the current thread
                RaisePropertyChanged(e);
            }
            else
            {
                // Send the PropertyChanged event on the creator thread
                PwgModelManager.WPF_SynchronizationContext.Send(RaisePropertyChanged, e);
            }
        }

        private void RaisePropertyChanged(object param)
        {
            // We are in the creator thread, call the base implementation directly
            base.OnPropertyChanged((PropertyChangedEventArgs)param);
        }
    }
}