/*
 * Created on Dec 20, 2003
 *
 */
package jmslexamples.jsyn;

import java.awt.*;
import java.awt.event.*;

import com.softsynth.jmsl.*;
import com.softsynth.jmsl.jsyn.JSynInsFromClassName;
import com.softsynth.jmsl.jsyn.JSynMusicDevice;

/**
 * Alter performance data non-destructively using DataTranslator
 * 
 * Play a MusicShape with chromatic pitches.  
 * 
 * Check a box to set/unset its DataTranslator to a WholeToneTranslator
 * 
 * @see com.softsynth.jmsl.DataTranslator
 * @see jmslexamples.jsyn.DataTranslatorVectorDemo
 * 
 * @author Nick Didkovsky, email: didkovn@mail.rockefeller.edu, (c) 2003 Nick Didkovsky, all rights reserved. 
 *
 */
public class DataTranslatorDemo extends java.applet.Applet implements ItemListener, ActionListener {

	MusicShape myShape;
	JMSLMixerContainer mixer;
	Button startButton;
	Button stopButton;
	Checkbox useTranslatorCheckbox;

	public void init() {

	}

	public void start() {
		setLayout(new BorderLayout());
		add(BorderLayout.NORTH, useTranslatorCheckbox = new Checkbox("Use Whole Tone Translator"));
		useTranslatorCheckbox.addItemListener(this);
		Panel p = new Panel();
		p.setLayout(new GridLayout(1, 2));
		p.add(startButton = new Button("START"));
		startButton.addActionListener(this);
		p.add(stopButton = new Button("STOP"));
		add(BorderLayout.SOUTH, p);
		stopButton.addActionListener(this);
		stopButton.setEnabled(false);
		buildMusic();
	}

	private void buildMusic() {
		MusicDevice dev = JSynMusicDevice.instance();
		dev.open();
		JSynInsFromClassName ins = new JSynInsFromClassName(4, com.softsynth.jsyn.circuits.FilteredSawtoothBL.class.getName());

		mixer = new JMSLMixerContainer();
		mixer.addInstrument(ins);
		mixer.start();

		myShape = new MusicShape(4);
		for (int i = 0; i < 13; i++) {
			myShape.add(0.25, i + 60, 0.5, 0.2);
		}
		myShape.setInstrument(ins);
		myShape.setRepeats(Integer.MAX_VALUE);
	}

	public void stop() {
		myShape.finishAll();
		removeAll();
		JMSL.closeMusicDevices();
	}

	public void itemStateChanged(ItemEvent arg0) {
		if (useTranslatorCheckbox.getState()) {
			System.out.println("Set translator");
			myShape.setDataTranslator(new WholeToneTranslator(60));
		}
		else {
			System.out.println("UNSet translator");
			myShape.setDataTranslator(null);
		}
	}

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

	}

	private class WholeToneTranslator implements DataTranslator {
		double centerPitch;

		public WholeToneTranslator(double centerPitch) {
			this.centerPitch = centerPitch;
		}

		public double[] translate(MusicJob job, double[] data) {
			// make a copy of the incoming double[]
			double[] dar = new double[data.length];
			System.arraycopy(data, 0, dar, 0, data.length);

			double difference = dar[1] - centerPitch;
			dar[1] = dar[1] + 2 * difference;
			return dar;
		}

	}
}