public static CollectionWrapper GetCollectionWrapperInstance(IEnumerable collection /*, bool shareCollectionPerThread*/)
{
//if (shareCollectionPerThread)
//{
lock (CollectionWrapper.collectionWrappers)
{
return(CollectionWrapper.GetCollectionWrapperInstance(CollectionWrapper.collectionWrappers, collection));
}
//}
//else
//{
// return new CollectionWrapper(collection, Dispatcher.CurrentDispatcher);
//}
}
private static CollectionWrapper GetCollectionWrapperInstance(IDictionary <IEnumerable, CollectionWrapper> collectionWrappers, IEnumerable collection)
{
lock (collectionWrappers)
{
if (collectionWrappers.ContainsKey(collection))
{
return(collectionWrappers[collection]);
}
else
{
CollectionWrapper Wrapper = new CollectionWrapper(collection);
collectionWrappers.Add(collection, Wrapper);
return(Wrapper);
}
}
}
///// <summary>
///// specifies wether fade in/out animations for items are enabled for the items control
///// </summary>
//public static readonly BindableProperty EnableItemFadeAnimationsProperty = BindableProperty.CreateAttached("EnableItemFadeAnimations", typeof(bool), typeof(CrossThreadCollectionWrapper), false,propertyChanged: CrossThreadCollectionWrapper.EnableItemFadeAnimationsChanged));
///// <summary>
///// specifies the storyboard for the fade in animation
///// </summary>
//public static readonly BindableProperty FadeInAnimationProperty = BindableProperty.CreateAttached("FadeInAnimation", typeof(Storyboard), typeof(CrossThreadCollectionWrapper));
///// <summary>
///// specifies the storyboard for the fade out animation
///// </summary>
//public static readonly BindableProperty FadeOutAnimationProperty = BindableProperty.CreateAttached("FadeOutAnimation", typeof(Storyboard), typeof(CrossThreadCollectionWrapper));
//private static void EnableItemFadeAnimationsChanged(BindableObject bindable, object oldValue, object newValue)
//{
// ItemsControl ItemsControl = (ItemsControl) d;
// CollectionWrapper.RegisteredControls.Add(ItemsControl);
//}
///// <summary/>
//public CrossThreadCollectionWrapper()
//{
// this.ShareCollectionPerControl = true;
//}
#region IValueConverter Members
/// <summary>
/// Converts a value.
/// </summary>
/// <returns>
/// A converted value. If the method returns null, the valid null value is used.
/// </returns>
/// <param name="value">The value produced by the binding source.</param><param name="targetType">The type of the binding target property.</param><param name="parameter">The converter parameter to use.</param><param name="culture">The culture to use in the converter.</param>
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
object Collection = value;
if (Collection == null)
{
return(null);
}
else if (Collection is IEnumerable && Collection is INotifyCollectionChanged)
{
return(CollectionWrapper.GetCollectionWrapperInstance((IEnumerable)Collection /*,this.ShareCollectionPerControl*/));
}
else
{
throw new InvalidOperationException("Collection to wrap is either not enumerable or does not support INotifyCollectionChanged");
}
}