/// <summary>
/// Initializes a new instance of the <see cref="ChordsManager"/> with the specified events
/// collection, notes tolerance and comparison delegate for events that have same time.
/// </summary>
/// <param name="eventsCollection"><see cref="EventsCollection"/> that holds chord events to manage.</param>
/// <param name="notesTolerance">Notes tolerance that defines maximum distance of notes from the
/// start of the first note of a chord. Notes within this tolerance will be considered as a chord.</param>
/// <param name="sameTimeEventsComparison">Delegate to compare events with the same absolute time.</param>
/// <exception cref="ArgumentNullException"><paramref name="eventsCollection"/> is null.</exception>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="notesTolerance"/> is negative.</exception>
public ChordsManager(EventsCollection eventsCollection, long notesTolerance = 0, Comparison <MidiEvent> sameTimeEventsComparison = null)
{
ThrowIfArgument.IsNull(nameof(eventsCollection), eventsCollection);
ThrowIfNotesTolerance.IsNegative(nameof(notesTolerance), notesTolerance);
_notesManager = eventsCollection.ManageNotes(sameTimeEventsComparison);
Chords = new ChordsCollection(CreateChords(_notesManager.Notes, notesTolerance));
Chords.CollectionChanged += OnChordsCollectionChanged;
}
private void OnChordsCollectionChanged(ChordsCollection collection, ChordsCollectionChangedEventArgs args)
{
var addedChords = args.AddedChords;
if (addedChords != null)
{
foreach (var chord in addedChords)
{
AddNotes(chord.Notes);
SubscribeToChordEvents(chord);
}
}
var removedChords = args.RemovedChords;
if (removedChords != null)
{
foreach (var chord in removedChords)
{
RemoveNotes(chord.Notes);
UnsubscribeFromChordEvents(chord);
}
}
}