NoteLength.java

/*******************************************************************************
 * Catroid: An on-device visual programming system for Android devices
 *  Copyright (C) 2010-2013 The Catrobat Team
 *  (<http://developer.catrobat.org/credits>)
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or (at your option) any later version.
 *
 *  An additional term exception under section 7 of the GNU Affero
 *  General Public License, version 3, is available at
 *  http://www.catroid.org/catroid/licenseadditionalterm
 *
 *  This program 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package org.catrobat.musicdroid.note;

public enum NoteLength {
	WHOLE_DOT(4f + 2f), WHOLE(4f), HALF_DOT(2f + 1f), HALF(2f), QUARTER_DOT(1f + 1 / 2f), QUARTER(1f), EIGHT_DOT(
			1 / 2f + 1 / 4f), EIGHT(1 / 2f), SIXTEENTH(1 / 4f);

	protected static final double DEFAULT_DURATION = 384 / 48 * 60;
	protected static final NoteLength SMALLEST_NOTE_LENGTH = SIXTEENTH;

	private long tickDuration;

	private NoteLength(double length) {
		this.tickDuration = Math.round(DEFAULT_DURATION * length);
	}

	public static NoteLength getNoteLengthFromTickDuration(long duration) {
		NoteLength noteLength = SMALLEST_NOTE_LENGTH;
		NoteLength[] allNoteLengths = NoteLength.values();

		for (int i = (allNoteLengths.length - 1); i >= 0; i--) {
			long difference = duration - allNoteLengths[i].getTickDuration();

			if (difference < 0) {
				break;
			}

			noteLength = allNoteLengths[i];
		}

		return noteLength;
	}

	public long getTickDuration() {
		return tickDuration;
	}

	public boolean hasStem() {
		if ((this == WHOLE) || (this == WHOLE_DOT)) {
			return false;
		}

		return true;
	}

	public boolean hasFlag() {
		return ((this == EIGHT) || (this == EIGHT_DOT) || (this == SIXTEENTH));
	}

	public int getAmountOfFlags() {
		if (this == SIXTEENTH) {
			return 2;
		} else if ((this == EIGHT) || (this == EIGHT_DOT)) {
			return 1;
		}

		return 0;
	}

	public boolean hasDot() {
		return (this == WHOLE_DOT) || (this == HALF_DOT) || (this == QUARTER_DOT) || (this == EIGHT_DOT);
	}

	public boolean isFilled() {
		return (this != WHOLE_DOT) && (this != WHOLE) && (this != HALF) && (this != HALF_DOT);
	}
}