/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * JavaWorld Library, Copyright 2011 Bryan Chadwick * * * * FILE: ./world/sound/test/KeySoundWorld.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.test; import image.*; import world.sound.SoundWorld; import world.sound.tunes.Note; import java.util.*; /** React to key events to play a simple keyboard using * 'a' through 'k' for white keys and * 'w'/'e'/'t'/'y'/'u' as black keys. */ public class KeySoundWorld extends SoundWorld{ public static void main(String[] args){ new KeySoundWorld().bigBang(); } // Which Piano keys (note values) are currently pressed. // Used for drawing the keys red instead of white/black HashSet down = new HashSet(); // Mapping of the keys to note offsets (in the current octave) HashMap keys = new HashMap(); // Mapping of the drawing order to Note values HashMap draw = new HashMap(); // Base note... sets the octave int base = 36; // Use channel 1 to start, up/down keys change this int channel = 1; // Initialize all the Maps KeySoundWorld(){ // Letter to note values this.keys.put("a", 0); this.keys.put("w", 1); this.keys.put("s", 2); this.keys.put("e", 3); this.keys.put("d", 4); this.keys.put("f", 5); this.keys.put("t", 6); this.keys.put("g", 7); this.keys.put("y", 8); this.keys.put("h", 9); this.keys.put("u", 10); this.keys.put("j", 11); this.keys.put("k", 12); // Drawing order to note values (white keys first) this.draw.put(0, 0); this.draw.put(8, 1); this.draw.put(1, 2); this.draw.put(9, 3); this.draw.put(2, 4); this.draw.put(3, 5); this.draw.put(11, 6); this.draw.put(4, 7); this.draw.put(12, 8); this.draw.put(5, 9); this.draw.put(13, 10); this.draw.put(6, 11); this.draw.put(7, 12); } /** Draw the traditional piano keys */ public Scene onDraw(){ Scene acc = new EmptyScene(400, 200); // White keys first for(int i = 0; i < 8; i++) acc = acc.placeImage(new Rectangle(40, 120, mode(i), color(i)), 60+i*40, 100); // Black keys... skip "2" since there is a gap for(int i = 0; i < 6; i++){ if(i != 2) acc = acc.placeImage(new Rectangle(30, 60, "solid", color(8+i)), 80+i*40, 60); } return acc; } /** Use the color red if the key is down */ String color(int i){ if(this.down.contains(this.draw.get(i))) return "red"; return "black"; } /** Paint solid if the key is down or it's a black key */ String mode(int i){ if(i >= 8 || this.down.contains(this.draw.get(i))) return "solid"; return "outline"; } /** Key Down... add the note and add to the down keys */ public void onKey(String key){ // One of the Piano keys if(this.keys.containsKey(key) && !down.contains(this.keys.get(key))){ this.keyTunes.addNote(this.channel, new Note(this.base+this.keys.get(key), 8)); this.down.add(this.keys.get(key)); } // Up/Down to change the channel (instrument) if(key.equals("up")){ this.channel++; }else if(key.equals("down")){ this.channel--; } } /** Lift the key */ public void onRelease(String key){ if(this.keys.containsKey(key)){ this.down.remove(this.keys.get(key)); } } }