private void LoadNotes(int numberOfKeys)
{
if (ActualWidth == 0)
{
return;
}
// Find the last white note that fits. If there aren't enough notes above the bottom note in the scale, drop the bottom
// note so we get the right number of notes.
IScaleNote[] whiteNotesToUse = WhiteKeyNotes.SkipWhile(n => n.MidiNoteNumber < BottomNote.MidiNoteNumber).ToArray();
if (whiteNotesToUse.Length > numberOfKeys)
{
whiteNotesToUse = whiteNotesToUse.Take(numberOfKeys).ToArray();
}
else if (whiteNotesToUse.Length < numberOfKeys)
{
BottomNote = WhiteKeyNotes.ElementAt(WhiteKeyNotes.Count - numberOfKeys);
whiteNotesToUse = WhiteKeyNotes.SkipWhile(n => n.MidiNoteNumber < BottomNote.MidiNoteNumber).ToArray();
}
IScaleNote topNote = whiteNotesToUse.Last();
// locate the top and bottom note in the master scale, and use everything between them, inclusive.
int startIndex = Scale.EqualTemperedScale.ToList().IndexOf(BottomNote);
int endIndex = Scale.EqualTemperedScale.ToList().IndexOf(topNote);
ClearNotes();
AddNotes(startIndex, endIndex);
}
private void ShiftKeys(int shiftAmount)
{
int targetNoteNumber;
if (shiftAmount < -12)
{
targetNoteNumber = Scale.EqualTemperedScale.First().MidiNoteNumber;
}
else if (shiftAmount > 12)
{
targetNoteNumber = Scale.EqualTemperedScale.Last().MidiNoteNumber - Notes.Count + 1;
}
else
{
targetNoteNumber = BottomNote.MidiNoteNumber + shiftAmount;
}
IScaleNote newNote = Scale.EqualTemperedScale.FirstOrDefault(n => n.MidiNoteNumber == targetNoteNumber);
while (newNote != null && !newNote.IsWhiteKey)
{
targetNoteNumber += Math.Sign(shiftAmount);
newNote = Scale.EqualTemperedScale.FirstOrDefault(n => n.MidiNoteNumber == targetNoteNumber);
}
if (newNote != null)
{
BottomNote = newNote;
LoadNotes(Notes.Count(n => n.Item.IsWhiteKey));
}
}
private void SetPitch(SimpleVoice voice)
{
if (voice.FromMidiNote != null)
{
// TODO this search could be optimized
IScaleNote scaleNote = _scale.FirstOrDefault(n => n.MidiNoteNumber == voice.FromMidiNote.Number);
if (scaleNote != null)
{
voice.Pitch = scaleNote.Pitch + (Pitch.HalfStep * PitchBendRange * _midiSource.PitchBend);
}
}
}
