static void OnDataSourcePropertyChanged(BindableObject bindable, object oldValue, object newValue)
{
SerialChart chart = bindable as SerialChart;
DetachOldDataSourceCollectionChangedListener(chart, oldValue);
AttachDataSourceCollectionChangedListener(chart, newValue);
chart.NotifyDataSourceChanges();
}
static void OnColorPropertyChanged(BindableObject bindable, object oldValue, object newValue)
{
SerialChart chart = bindable as SerialChart;
chart.NotifyColorChanges();
}
static void AttachDataSourceCollectionChangedListener(SerialChart chart, object dataSource)
{
if (dataSource != null && dataSource is INotifyCollectionChanged)
(dataSource as INotifyCollectionChanged).CollectionChanged += new NotifyCollectionChangedEventHandler(chart.OnDataSourceCollectionChanged);
}
static void DetachOldDataSourceCollectionChangedListener(SerialChart chart, object dataSource)
{
if (dataSource != null && dataSource is INotifyCollectionChanged)
(dataSource as INotifyCollectionChanged).CollectionChanged -= chart.OnDataSourceCollectionChanged;
}