/*
 * Created on May 27, 2004
 *
 */
package jmslexamples;

import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.util.Date;

import com.softsynth.jmsl.*;
import com.softsynth.jmsl.midi.*;

/**
 * 
 * Play a self-modifying MusicShape with a JMSL MidiInstrument using
 * MidiIO_JavaSound as MusicDevice <br>
 * <br>
 * 
 * 
 * JavaSound Midi applet notes, Windows XP
 * 
 * Applets using JavaSound MIDI ( javax.sound.midi ) will not work using the
 * standard Sun Java plugin distribution. You must manually install a soundbank
 * for the Java plugin to use *OR* provide MidiIO_JavaSound with a URL to a
 * soundbank!!!
 * 
 * To find out where your Java plugin is installed: Control Panel -&gt; Java
 * Plug-in -&gt; Advanced tab (read location under Java Runtime Environment
 * listing) My Java plugin is in C:\Program Files\Java\j2re1.4.1_07
 * 
 * In Windows Explorer, I browsed to C:\Program Files\Java\j2re1.4.1_07 and
 * opened the &quot;lib&quot; folder In &quot;lib&quot; I made New Folder named
 * &quot;audio&quot;
 * 
 * From various jsdk installations, I found and copied soundbank.gm into the new
 * audio folder [ C:\Program Files\Java\j2re1.4.1_07\lib\audio ]
 * 
 * Loading this applet plays midi notes ok now.
 * 
 * Nick Didkovsky
 * 
 * 
 * 
 * 
 * 
 * @author Nick Didkovsky, email: didkovn@mail.rockefeller.edu, (c) 2004 Nick
 *         Didkovsky, all rights reserved.
 */
public class JavaSoundMidiAppletExample extends java.applet.Applet implements ActionListener {

    JMSLMixerContainer mixer;
    MusicShape musicShape;
    Button startButton;
    Button stopButton;

    public void init() {
        // tell JMSL it is running in an applet so MidiIO_JavaSound will look
        // for a sound bank at a URL instead of a File if the client has no
        // soundbank installed
        JMSL.setIsApplet(true);
        JMSLRandom.randomize();
    }

    public void start() {
        synchronized (JMSL.class) {
            System.out.println("JavaSoundMidiAppletExample.start() " + new Date());
            JMSL.clock = new DefaultMusicClock();
            // IMPORTANT! Start with a new scheduler!
            JMSL.scheduler = new EventScheduler();
            JMSL.scheduler.start();
            JMSL.clock.setAdvance(0.1);

            initMIDI();
            buildMixer();
            buildMusicShape();
            buildGUI();
            System.out.println("JavaSoundMidiAppletExample.start() done");
        }
    }

    public void stop() {
        synchronized (JMSL.class) {
            System.out.println("JavaSoundMidiAppletExample.stop() " + new Date());
            musicShape.finishAll();
            try {
                musicShape.waitForDone();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            JMSL.scheduler.stop();
            JMSL.closeMusicDevices();
            removeAll();
            System.out.println("JavaSoundMidiAppletExample.stop() done");
        }
    }

    private void buildMixer() {
        mixer = new JMSLMixerContainer();
        mixer.start();
    }

    private void buildGUI() {
        setLayout(new BorderLayout());
        Panel p = new Panel();
        p.setLayout(new FlowLayout(FlowLayout.LEFT));
        p.add(startButton = new Button("START"));
        p.add(stopButton = new Button("STOP"));
        add(BorderLayout.SOUTH, p);
        add(BorderLayout.NORTH, new Label(JMSL.version));
        add(BorderLayout.CENTER, mixer.getPanAmpControlPanel());
        stopButton.setEnabled(false);
        startButton.addActionListener(this);
        stopButton.addActionListener(this);
    }

    private void buildMusicShape() {
        MidiInstrument ins = new MidiInstrument(1);
        mixer.addInstrument(ins);

        musicShape = new MusicShape(4);
        musicShape.add(0.5, 60, 90, 1.0);
        musicShape.add(0.75, 63, 110, 1.0);
        musicShape.add(0.75, 58, 120, 1.0);
        musicShape.add(0.5, 68, 80, 1.0);
        musicShape.setRepeats(Integer.MAX_VALUE);
        musicShape.setInstrument(ins);

        musicShape.addRepeatPlayable(new Playable() {

            public double play(double time, Composable parent) throws InterruptedException {
                MusicShape ms = (MusicShape) parent;
                ms.scramble(0, ms.size() - 1, 1);
                if (JMSLRandom.choose() < 0.6) {
                    ms.scramble(0, ms.size() - 1, 0);
                }
                ms.transpose(JMSLRandom.choose(-7, 7), 0, ms.size() - 1, 1);
                ms.calcStats();
                if (ms.getMin(1) < 30) {
                    ms.transpose(JMSLRandom.choose(1, 4) * 12, 0, ms.size() - 1, 1);
                }
                if (ms.getMin(1) > 80) {
                    ms.transpose(JMSLRandom.choose(1, 4) * -12, 0, ms.size() - 1, 1);
                }
                return time;
            }
        });
    }

    private void initMIDI() {
        JMSL.midi = MidiIO_JavaSound.instance();
        try {
            ((MidiIO_JavaSound) JMSL.midi).setSoundbankURL(new URL(getCodeBase(), "javasound/soundbank-min.gm"));
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        JMSL.midi.edit(new Frame());
        JMSL.midi.open();
    }

    public void actionPerformed(ActionEvent ev) {
        Object source = ev.getSource();
        if (source == startButton) {
            musicShape.launch(JMSL.now());
            startButton.setEnabled(false);
            stopButton.setEnabled(true);
        }
        if (source == stopButton) {
            musicShape.finishAll();
            startButton.setEnabled(true);
            stopButton.setEnabled(false);
        }

    }
}