paintComponent is not working
When I want my program to repaint, it's not displaying the visualization. What's wrong with it? I'm also using midi files so I guess you can grab any midi files. I can't link you to where I got them because I'm not allowed to post links..
Code:
import java.applet.Applet;
import java.applet.AudioClip;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.util.*;
import java.net.*;
import java.io.*;
import javax.sound.midi.*;
import javax.swing.*;
import javax.swing.Timer;
import javax.swing.border.LineBorder;
public class Music extends Applet {
static Music music;
Vector notes = new Vector();
static Sequence seq;
Sequencer sequencer;
Timer timer;
int WIDTH = 800;
int HEIGHT = 600;
double max = 0;
double min = HEIGHT;
boolean[] visible;
VolatileImage buffer;
Image background;
Graphics g;
double time;
Vector v;
Rectangle r;
static double zoom = 10.0;
Color[] colors = { Color.red, Color.yellow, Color.green, Color.blue,
Color.cyan, Color.magenta, Color.orange, Color.pink };
private Button start = new Button("Start");
private Button pause = new Button("Pause");
private Button stop = new Button("Stop");
private JComboBox midiFiles = new JComboBox(new Object[] {
"Moonlight Sonata", "Cantina", "Brahms" });
private AudioClip currentAudioClip;
private AudioClip[] audioClips = new AudioClip[3];
private int current = 0;
/**
* Main method: takes midi file parameter from commandline, starts applet
*
* @param args
*/
public static void main(String[] args) {
try {
seq = MidiSystem.getSequence(new File(args[0]));
if (args.length > 1)
zoom = Double.parseDouble(args[1]);
}// try
catch (Exception e) {
e.printStackTrace();
System.exit(0);
}// catch
music = new Music();
final JFrame frame = new JFrame();
frame.getContentPane().setLayout(new BorderLayout());
frame.add(music, BorderLayout.CENTER);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
music.go();
}// main
public Music() {
add(new Panel());
add(start);
add(pause);
add(stop);
add(midiFiles);
}
public void init() {
audioClips[0] = Applet.newAudioClip(getClass().getResource(
"MoonlightSonata3.mid"));
audioClips[1] = Applet.newAudioClip(getClass().getResource(
"cantina.mid"));
audioClips[2] = Applet.newAudioClip(getClass()
.getResource("brahms.mid"));
start.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
try {
if (currentAudioClip == audioClips[0]) {
seq = MidiSystem.getSequence(new File(
"MoonlightSonata3.mid"));
} else if (currentAudioClip == audioClips[1]) {
seq = MidiSystem.getSequence(new File("cantina.mid"));
} else if (currentAudioClip == audioClips[2]) {
seq = MidiSystem.getSequence(new File("brahms.mid"));
}
// currentAudioClip.play();
music = new Music();
music.go();
music.everythingStart();
} catch (InvalidMidiDataException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
pause.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
music.everythingStop();
}
});
stop.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
music.everythingStop();
}
});
midiFiles.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
stop();
current = midiFiles.getSelectedIndex();
presentMidi(current);
}
});
currentAudioClip = audioClips[0];
}
private void presentMidi(int index) {
midiFiles.setSelectedIndex(index);
currentAudioClip = audioClips[index];
}
public void start() {
}
public void stop() {
}
/**
* Starts playback of created midi sequence
*/
public void go() {
for (int j = 0; j < seq.getTracks().length; j++) {
Vector v = new Vector();
Track t = seq.getTracks()[j];
System.out.println(t.ticks() + " " + t.size());
RenderListener rt = new RenderListener(this);
timer = new Timer(100, rt);
MidiMessage m;
ShortMessage s;
MidiEvent e;
Rectangle r;
Point[] p = new Point[255];
for (int i = 0; i < p.length; i++) {
p[i] = new Point(-1, -1);
}// for
for (int i = 0; i < t.size(); i++) {
e = t.get(i);
m = e.getMessage();
if (m instanceof ShortMessage) {
s = (ShortMessage) m;
if (s.getCommand() == 144 || s.getCommand() == 128) {
if (p[s.getData1()].x == -1) {
p[s.getData1()].x = (int) (e.getTick() / zoom);
}// if
else {
r = new Rectangle(
p[s.getData1()].x,
s.getData1() * 5,
(int) (e.getTick() / zoom - p[s.getData1()].x),
10);
v.add(r);
if (r.y < min)
min = r.y;
if (r.y > max)
max = r.y;
// System.out.println("added");
p[s.getData1()].x = -1;
}// else
}// if
}// if
}// for
if (v.size() > 0) {
notes.add(v);
}// if
}// for
visible = new boolean[notes.size()];
Arrays.fill(visible, true);
try { // starts actual playback. Note that timer must be created and
// started *before* music starts playing
sequencer = MidiSystem.getSequencer();
sequencer.open();
sequencer.setSequence(seq);
sequencer.setTempoFactor(1.0f);
timer.start();
sequencer.start();
}// try
catch (Exception e) {
e.printStackTrace();
System.exit(0);
}// catch
}// start
public void everythingStop() {
timer.stop();
sequencer.stop();
}
public void everythingStart() {
timer.start();
sequencer.start();
}
class RenderListener implements ActionListener {
Music parent;
RenderListener(Music m) {
parent = m;
}
public void actionPerformed(ActionEvent ev) {
//repaint();
if (sequencer == null || !sequencer.isRunning())
return;
time = sequencer.getTickPosition();
time /= zoom;
//repaint();
parent.repaint();
//parent.render();
}
}
public class Panel extends JPanel {
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (buffer == null) {
buffer = createVolatileImage(WIDTH, HEIGHT);
g = buffer.getGraphics();
}// if
g.setColor(Color.black);
g.fillRect(0, 0, WIDTH, HEIGHT);
for (int i = 0; i < notes.size(); i++) {
v = (Vector) (notes.elementAt(i));
for (int j = 0; j < v.size(); j++) {
r = (Rectangle) (v.elementAt(j));
if ((r.x - time) > WIDTH / 2 + 200) {
break;
}// if
if ((r.x - time + r.width) < -WIDTH / 2) {
v.removeElementAt(j);
}// if
else if (visible[i]) {
if (r.x - time <= 0 && r.x - time + r.width >= 0) {
g.setColor(Color.white);
}// if
else {
g.setColor(colors[i % colors.length]);
}// else
g.fillOval((int) ((r.x - time) + WIDTH / 2),
(int) (HEIGHT - r.y), (int) (r.width),
(int) r.height);
}// else
}// for
}// for
getGraphics().drawImage(buffer, 0, 0, this);
}
}
public Dimension getPreferredSize() {
return new Dimension(WIDTH, HEIGHT);
}
}// Music
