/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * JavaWorld Library, Copyright 2011 Bryan Chadwick * * * * FILE: ./world/sound/tunes/Chord.java * * * * This file is part of JavaWorld. * * * * JavaWorld is free software: you can redistribute it and/or * * modify it under the terms of the GNU General Public License * * as published by the Free Software Foundation, either version * * 3 of the License, or (at your option) any later version. * * * * JavaWorld 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. * * * * You should have received a copy of the GNU General Public License * * along with JavaWorld. If not, see . * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ package world.sound.tunes; import java.util.*; /** A class to represent a collection of notes to be played * on one instrument at the same time. Individual notes do * not need to have the same duration. * * Based in part on a class originally designed by Viera K. Proulx. */ public class Chord{ /** The default Note duration. */ public static final int DEFAULT_DUR = 1; /** the list of notes in this chord */ public ArrayList notes = new ArrayList(); /** The default constructor */ public Chord(){} /** Creates a Chord from a sequence of Pitches (Note numbers) */ public Chord(int ... pitches){ for(int pitch: pitches) this.addNote(pitch, DEFAULT_DUR); } /** Create a Chord from a sequence of Notes. */ public Chord(Note ... notes){ for(Note n : notes){ this.addNote(n); } } /** Add a given note to this Chord. */ public void addNote(Note n){ this.notes.add(n.copy()); } /** Add a Note with the given pitch and duration to this Chord. */ public void addNote(int pitch, int duration){ this.notes.add(new Note(pitch, duration)); } /** Reduce all the Notes in this Chord by a single beat. Produces a * Chord representing the list of notes that have stopped playing. */ public Chord nextBeat(){ Chord ch = new Chord(); for(int i = 0; i < this.notes.size(); i++){ Note n = this.notes.get(i); n.nextBeat(); if(n.getDuration() <= 0) ch.addNote(n); } return ch; } /** Have all notes in this chord finish playing? */ public boolean isSilent(){ for(int i = 0; i < this.notes.size(); i++){ Note n = this.notes.get(i); if(n.getDuration() > 0) return false; } return true; } /** Make a copy of this Chord by copying its Notes */ public Chord copy(){ Chord result = new Chord(); for(int i = 0; i < this.notes.size(); i++){ Note n = this.notes.get(i); result.addNote(n.copy()); } return result; } /** A singleton Chord representing silence */ public static final Chord noplay = new Chord(); /** Get the number of Notes in this Chord. */ public int size(){ return this.notes.size(); } /** Does this chord contain the given note? */ public boolean containsNote(Note note){ for(int i = 0; i < this.notes.size(); i++){ Note n = this.notes.get(i); if(note.sameNote(n)) return true; } return false; } }