/// <summary>
/// Raises the <see cref="BindingList{T}.ListChanged" /> event, but also makes sure the event is dispatched to the UI thread.
/// </summary>
/// <param name="e">The <see cref="ListChangedEventArgs" /> instance containing the event data.</param>
protected override void OnListChanged(ListChangedEventArgs e)
{
// Convert args if needed
if (!(e is NotifyListChangedEventArgs))
{
if (e.NewIndex >= 0 && e.OldIndex >= 0)
{
e = new NotifyListChangedEventArgs(e.ListChangedType,
e.NewIndex,
e.NewIndex >= 0 ? this[e.NewIndex] : default(T),
e.OldIndex,
e.OldIndex >= 0 ? this[e.OldIndex] : default(T));
}
else
{
e = new NotifyListChangedEventArgs(e.ListChangedType,
e.NewIndex,
e.NewIndex >= 0 ? this[e.NewIndex] : default(T),
e.PropertyDescriptor);
}
}
if (AutomaticallyDispatchChangeNotifications)
{
_dispatcherService.BeginInvokeIfRequired(() => base.OnListChanged(e));
}
else
{
base.OnListChanged(e);
}
}
/// <summary>
/// Notifies external classes of property changes.
/// </summary>
protected void NotifyChanges()
{
Action action = () =>
{
// Create event args
ListChangedEventArgs eventArgs = null;
if (_suspensionContext != null && _suspensionContext.Mode == SuspensionMode.Adding)
{
if (_suspensionContext.NewItems.Count != 0)
{
eventArgs = new NotifyRangedListChangedEventArgs(NotifyRangedListChangedAction.Add, _suspensionContext.NewItems, _suspensionContext.NewItemIndices);
}
}
else if (_suspensionContext != null && _suspensionContext.Mode == SuspensionMode.Removing)
{
if (_suspensionContext.OldItems.Count != 0)
{
eventArgs = new NotifyRangedListChangedEventArgs(NotifyRangedListChangedAction.Remove, _suspensionContext.OldItems, _suspensionContext.OldItemIndices);
}
}
else
{
eventArgs = new NotifyListChangedEventArgs(ListChangedType.Reset);
}
// Fire events
if (eventArgs != null)
{
OnListChanged(eventArgs);
}
};
if (AutomaticallyDispatchChangeNotifications)
{
_dispatcherService.BeginInvokeIfRequired(action);
}
else
{
action();
}
}