/* -*- c-basic-offset: 2; indent-tabs-mode: nil; -*- */
/*
* FreeDots -- MusicXML to braille music transcription
*
* Copyright 2008-2010 Mario Lang All Rights Reserved.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details (a copy is included in the LICENSE.txt file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License
* along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This file is maintained by Mario Lang <mlang@delysid.org>.
*/
package freedots.music;
/**
* An accidental sign raises or lowers the following note from its normal
* pitch, usually by a semitone, although microtonal music may use "fractional"
* accidental signs, and one occasionally sees double sharps or flats, which
* raise or lower the indicated note by a whole tone (though their most common
* usage is in keys in which the altered note is already raised or lowered by
* the key signature, so the altered note is only a half step from its usual
* pitch in that key). Accidentals apply within the measure and octave in which
* they appear, unless canceled by another accidental sign, or tied into a
* following measure. See {@link AccidentalContext}.
*/
public enum Accidental {
NATURAL(0),
FLAT(-1), SHARP(1),
DOUBLE_FLAT(-2), DOUBLE_SHARP(2),
QUARTER_FLAT(-0.5), QUARTER_SHARP(0.5);
private double alter;
Accidental(final double alter) { this.alter = alter; }
public double getAlter() { return alter; }
public static Accidental fromAlter(double alter) {
for (Accidental accidental: Accidental.values())
if (accidental.getAlter() == alter) return accidental;
return null;
}
}