JavaExercises/Head First Java/BeatBox.java at master · biblelamp/JavaExercises · GitHub

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import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.filechooser.FileNameExtensionFilter;

import javax.swing.event.ListSelectionEvent;

import javax.swing.event.ListSelectionListener;

import javax.sound.midi.*;

import java.util.*;

import java.io.*;

import java.net.*;

public class BeatBox {

JPanel mainPanel;

JList incomingList;

JTextField userMessage;

ArrayList<JCheckBox> checkboxList;

int nextNum;

ObjectInputStream in;

ObjectOutputStream out;

Vector<String> listVector = new Vector<String>();

String userName ;

HashMap<String, boolean[]> otherSeqsMap = new HashMap<String, boolean[]>();

Sequencer sequencer;

Sequence sequence;

Sequence mySequence = null;

Track track;

JFrame theFrame;

String[] instrumentNames = {"Bass Drum", "Closed Hi-Bat",

"Open Hi-Hat", "Acoustic Snare", "Crash Cymbal", "Hand Clap",

"High Tom", "Hi Bongo", "Maracas", "Whistle", "Low Conga",

"Cowbell", "Vibraslap", "Low-mid Tom", "High Aqoqo",

"0pen Hi Conga"};

int[] instruments = {35,42,46,38,49,39,50,60,70,72,64,56,59,47,67,63};

public static void main(String[] args) {

new BeatBox().startUp(args[0]);

}

public void startUp(String name) {

userName = name;

try {

Socket sock = new Socket("127.0.0.1", 4242);

out = new ObjectOutputStream(sock.getOutputStream());

in = new ObjectInputStream(sock.getInputStream());

Thread remote = new Thread(new RemoteReader());

remote.start();

} catch (Exception ex) {

System.out.println("Couldn't connect - you'll have to play alone.");

}

setUpMidi();

buildGUI();

}

public void buildGUI() {

theFrame = new JFrame("Cyber BeatBox");

theFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

BorderLayout layout = new BorderLayout();

JPanel background = new JPanel(layout);

background.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));

checkboxList = new ArrayList<JCheckBox>();

Box buttonBox = new Box(BoxLayout.Y_AXIS);

JButton start = new JButton("Start");

start.addActionListener(new MyStartListener());

buttonBox.add(start);

JButton stop = new JButton("Stop");

stop.addActionListener(new MyStopListener());

buttonBox.add(stop);

JButton upTempo = new JButton("Tempo Up");

upTempo.addActionListener(new MyUpTempoListener());

buttonBox.add(upTempo);

JButton downTempo = new JButton("Tempo Down");

downTempo.addActionListener(new MyDownTempoListener());

buttonBox.add(downTempo);

JButton serializeIt = new JButton("Save It"); // ...into a file

serializeIt.addActionListener(new MySaveListener());

buttonBox.add(serializeIt);

JButton restoreIt = new JButton("Restore"); // ...from a file

restoreIt.addActionListener(new MyReadInListener());

buttonBox.add(restoreIt);

JButton sendIt = new JButton("Send It"); // ...to the net

sendIt.addActionListener(new MySendListener());

buttonBox.add(sendIt);

userMessage = new JTextField();

buttonBox.add(userMessage);

incomingList = new JList();

incomingList.addListSelectionListener(new MyListSelectionListener());

incomingList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

JScrollPane theList = new JScrollPane(incomingList);

buttonBox.add(theList);

incomingList.setListData(listVector);

Box nameBox = new Box(BoxLayout.Y_AXIS) ;

for (int i =0; i < 16; i++) {

nameBox.add(new Label(instrumentNames[i]));

}

background.add(BorderLayout.EAST, buttonBox) ;

background.add(BorderLayout.WEST, nameBox);

theFrame.getContentPane().add(background);

GridLayout grid = new GridLayout(16, 16);

grid.setVgap(1);

grid.setHgap(2);

mainPanel = new JPanel(grid);

background.add(BorderLayout.CENTER, mainPanel);

for (int i = 0; i < 256; i++) {

JCheckBox c = new JCheckBox();

c.setSelected(false);

checkboxList.add(c);

mainPanel.add(c);

}

theFrame.setBounds(50, 50, 300, 300);

theFrame.pack();

theFrame.setVisible(true);

}

public void setUpMidi() {

try {

sequencer = MidiSystem.getSequencer();

sequencer.open();

sequence = new Sequence(Sequence.PPQ, 4);

track = sequence.createTrack();

sequencer.setTempoInBPM(120);

} catch(Exception e) { e.printStackTrace(); }

}

public void buildTrackAndStart() {

// this will hold the instruments for each vertical column,

// in other words, each tick (may have multiple instruments)

ArrayList<Integer> trackList = null;

sequence.deleteTrack(track);

track = sequence.createTrack();

for (int i = 0; i < 16; i++) {

trackList = new ArrayList<Integer>();

for (int j = 0; j < 16; j++) {

JCheckBox jc = (JCheckBox) checkboxList.get(j + (16*i));

if (jc.isSelected()) {

int key = instruments[i];

trackList.add(key);

} else {

trackList.add(null);

}

makeTracks(trackList);

}

track.add(makeEvent(192, 9, 1, 0, 15)); // so we always go to full 16 beats

try {

sequencer.setSequence(sequence);

sequencer.setLoopCount(sequencer.LOOP_CONTINUOUSLY);

sequencer.start();

sequencer.setTempoInBPM(120);

} catch(Exception e) { e.printStackTrace(); }

}

public class MyStartListener implements ActionListener {

public void actionPerformed(ActionEvent a) {

buildTrackAndStart();

}

public class MyStopListener implements ActionListener {

public void actionPerformed(ActionEvent a) {

sequencer.stop();

}

public class MyUpTempoListener implements ActionListener {

public void actionPerformed(ActionEvent a) {

float tempoFactor = sequencer.getTempoFactor();

sequencer.setTempoFactor((float)(tempoFactor * 1.03));

}

public class MyDownTempoListener implements ActionListener {

public void actionPerformed(ActionEvent a) {

float tempoFactor = sequencer.getTempoFactor();

sequencer.setTempoFactor((float)(tempoFactor * 0.97));

}

public void changeSequence(boolean[] checkboxState) {

for (int i = 0; i < 256; i++) {

JCheckBox check = (JCheckBox) checkboxList.get(i);

if (checkboxState[i]) {

check.setSelected(true);

} else {

check.setSelected(false);

}

// This makes events for one instument at a time for all 16 beats

public void makeTracks(ArrayList<Integer> list) {

Iterator it = list.iterator();

for (int i = 0; i < 16; i++) {

Integer num = (Integer) it.next();

if (num != null) {

int numKey = num.intValue();

track.add(makeEvent(144, 9, numKey, 100, i));

track.add(makeEvent(128, 9, numKey, 100, i + 1));

}

public static MidiEvent makeEvent(int comd, int chan, int one, int two, int tick) {

MidiEvent event = null;

try {

ShortMessage a = new ShortMessage();

a.setMessage(comd, chan, one, two);

event = new MidiEvent(a, tick);

} catch(Exception e) { e.printStackTrace(); }

return event;

}

public class MySaveListener implements ActionListener {

public void actionPerformed(ActionEvent a) {

JFileChooser save = new JFileChooser();

save.setFileSelectionMode(JFileChooser.FILES_ONLY);

save.addChoosableFileFilter(new FileNameExtensionFilter("Saved beats (*.sbb)", "sbb"));

int result = save.showSaveDialog(theFrame);

if (result == JFileChooser.APPROVE_OPTION) {

boolean[] checkboxState = new boolean[256];

for (int i = 0; i < 256; i++) {

JCheckBox check = (JCheckBox) checkboxList.get(i);

if (check.isSelected()) {

checkboxState[i] = true;

}

try {

FileOutputStream fileStream = new FileOutputStream(new File(save.getSelectedFile().getPath() + (save.getSelectedFile().getPath().endsWith(".sbb")?"":".sbb")));

ObjectOutputStream os = new ObjectOutputStream(fileStream);

os.writeObject(checkboxState);

} catch(Exception e) {

e.printStackTrace();

}

public class MyReadInListener implements ActionListener {

public void actionPerformed(ActionEvent a) {

JFileChooser open = new JFileChooser();

open.setFileSelectionMode(JFileChooser.FILES_ONLY);

open.addChoosableFileFilter(new FileNameExtensionFilter("Saved beats (*.sbb)", "sbb"));

int result = open.showOpenDialog(theFrame);

if (result == JFileChooser.APPROVE_OPTION) {

boolean[] checkboxState = null;

try {

FileInputStream fileIn = new FileInputStream(new File(open.getSelectedFile().getPath()));

ObjectInputStream is = new ObjectInputStream(fileIn);

checkboxState = (boolean[]) is.readObject();

} catch(Exception e) {

e.printStackTrace();

}

for (int i = 0; i < 256; i++) {

JCheckBox check = (JCheckBox) checkboxList.get(i);

if (checkboxState[i]) {

check.setSelected(true);

} else {

check.setSelected(false);

}

sequencer.stop();

buildTrackAndStart();

}

public class MySendListener implements ActionListener {

public void actionPerformed(ActionEvent a) {

// make an arraylist of just the STATE of the checkboxes

boolean[] checkboxState = new boolean[256];

for (int i = 0; i < 256; i++) {

JCheckBox check = (JCheckBox) checkboxList.get(i);

if (check.isSelected()) {

checkboxState[i] = true;

}

try {

out.writeObject(userName + nextNum++ + ": " + userMessage.getText());

out.writeObject(checkboxState);

} catch(Exception ex) {

ex.printStackTrace();

System.out.println("Sorry... Couldn't send it to the server.");

}

public class MyListSelectionListener implements ListSelectionListener {

public void valueChanged(ListSelectionEvent le) {

if (!le.getValueIsAdjusting()) {

String selected = (String) incomingList.getSelectedValue();

if (selected != null) {

boolean[] selectedState = (boolean[]) otherSeqsMap.get(selected);

changeSequence(selectedState);

sequencer.stop();

buildTrackAndStart();

}

public class RemoteReader implements Runnable {

boolean[] checkboxState = null;

String nameToShow = null;

Object obj = null;

public void run() {

try {

while ((obj=in.readObject()) != null) {

System.out.println("got an object from server");

System.out.println(obj.getClass());

String nameToShow = (String) obj;

checkboxState = (boolean[]) in.readObject();

otherSeqsMap.put(nameToShow, checkboxState);

listVector.add(nameToShow);

incomingList.setListData(listVector);

}

} catch (Exception e) { e.printStackTrace(); }

}

JavaExercises/Head First Java/BeatBox.java at master · biblelamp/JavaExercises · GitHub

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