void OnItemsSourceCollectionChanged(object sender, NotifyCollectionChangedEventArgs args)
{
ItemPoints.Clear();
Points.Clear();
foreach (object item in ItemsSource)
{
ItemPoints.Add(new ItemPoint(item));
Points.Add(new Point());
}
// Also check for INotifyPropertyChanged
if (args.OldItems != null)
{
foreach (object item in args.OldItems)
{
if (item is INotifyPropertyChanged)
{
(item as INotifyPropertyChanged).PropertyChanged -= OnItemPropertyChanged;
}
}
}
if (args.NewItems != null)
{
foreach (object item in args.NewItems)
{
if (item is INotifyPropertyChanged)
{
(item as INotifyPropertyChanged).PropertyChanged += OnItemPropertyChanged;
}
}
}
CalculateAxisScalers();
}
void OnItemsSourceChanged(DependencyPropertyChangedEventArgs args)
{
// Transfer new collection of items in ItemsSource to ItemPoints
ItemPoints.Clear();
Points.Clear();
if (args.NewValue != null)
{
foreach (object item in ItemsSource)
{
ItemPoints.Add(new ItemPoint(item));
Points.Add(new Point());
}
}
// Install (or remove) handlers for CollectionChanged event
if (args.OldValue is INotifyCollectionChanged)
{
(args.OldValue as INotifyCollectionChanged).CollectionChanged -= OnItemsSourceCollectionChanged;
}
if (args.NewValue is INotifyCollectionChanged)
{
(args.NewValue as INotifyCollectionChanged).CollectionChanged += OnItemsSourceCollectionChanged;
}
CalculateAxisScalers();
}