package jmslexamples.jsyn;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import com.softsynth.jmsl.*;
import com.softsynth.jmsl.jsyn.JSynInsFromClassName;
import com.softsynth.jmsl.jsyn.JSynMusicDevice;
import com.softsynth.jmsl.util.EventDistributions;
import com.softsynth.jmsl.view.JMSLScrollbar;
import com.softsynth.jmsl.view.JMSLScrollbarProcessor;
import com.softsynth.jsyn.AppletFrame;

/**
 * Launch a MusicJob whose performance density is generated by a Myhill Distribution. Provide GUI
 * sliders for user to change density parameters.
 * 
 * @author Nick Didkovsky, copyright Nick Didkovsky 4/4/01 10:32AM
 */

public class EventDistributionsJSynDemo extends java.applet.Applet implements JMSLScrollbarProcessor, ActionListener {

    JMSLMixerContainer mixer;

    JMSLScrollbar meanScrollbar;
    JMSLScrollbar ratioScrollbar;
    Label meanLabel;
    Label ratioLabel;

    double mean = 4.0;
    double ratio = 1.01;

    DensityJob job;

    Button startButton;
    Button stopButton;

    public void init() {
        JMSLRandom.randomize();
        setLayout(new GridLayout(2, 1));
    }

    public void start() {
        JSynMusicDevice.instance().edit(new Frame());
        JSynMusicDevice.instance().open();
        JSynMusicDevice.instance().setEditEnabled(false);
        JMSL.clock.setAdvance(0.1);
        JSynInsFromClassName ins = new JSynInsFromClassName(8, com.softsynth.jmsl.jsyn.circuits.BrassSynthNote.class
                .getName());
        mixer = new JMSLMixerContainer();
        mixer.start();
        mixer.addInstrument(ins);

        job = new DensityJob();
        job.setRepeats(Integer.MAX_VALUE);
        job.setInstrument(ins);
        job.setDensity(mean);
        job.setRatio(ratio);

        meanScrollbar = new JMSLScrollbar(this, (int) mean * 100, 10, 2000);
        meanScrollbar.setSize(200, 20);

        meanLabel = new Label(" Mean= " + meanScrollbar.getValue() / 100.0);

        Panel p1 = new Panel();
        p1.setLayout(new GridLayout(1, 2));
        p1.add(meanScrollbar);
        p1.add(meanLabel);

        ratioScrollbar = new JMSLScrollbar(this, (int) (ratio * 100), 101, 12800); // 100ths
        ratioScrollbar.setSize(200, 20);

        ratioLabel = new Label(" Ratio= " + (ratioScrollbar.getValue() / 100.0));

        Panel p2 = new Panel();
        p2.setLayout(new GridLayout(1, 2));
        p2.add(ratioScrollbar);
        p2.add(ratioLabel);

        Panel p = new Panel();
        p.setLayout(new GridLayout(2, 1));

        p.add(p1);
        p.add(p2);

        add("North", p);

        p = new Panel();
        p.setLayout(new GridLayout(1, 2));
        p.add(startButton = new Button("START"));
        p.add(stopButton = new Button("STOP"));
        add("South", p);

        startButton.addActionListener(this);
        stopButton.addActionListener(this);

        /* Synchronize Java display. */
        getParent().validate();
        getToolkit().sync();

    }

    public void stop() {
        job.finish();
        removeAll();
        JMSL.closeMusicDevices();
    }

    // JMSLScrollbar style of handling scrollbar events
    public void JMSLScrollbarValueChanged(JMSLScrollbar source) {
        if (source == meanScrollbar) {
            handleMean();
        }
        if (source == ratioScrollbar) {
            handleRatio();
        }
    }

    public void actionPerformed(ActionEvent e) {
        Object source = e.getSource();
        if (source == startButton)
            job.launch(JMSL.now());
        if (source == stopButton)
            job.finish();
    }

    public double getMean() {
        return mean;
    }

    void handleMean() {
        mean = (double) meanScrollbar.getValue() / 100.0;
        meanLabel.setText(" Mean= " + mean);
        job.setDensity(mean);
    }

    public double getRatio() {
        return ratio;
    }

    private String prettyString(double val) {
        return val + ""; // what's so pretty about that?
    }

    void handleRatio() {
        ratio = ((double) ratioScrollbar.getValue()) / 100.0;
        ratioLabel.setText(" Ratio= " + prettyString(ratio));
        job.setRatio(ratio);
    }

    public static void main(String args[]) {
        EventDistributionsJSynDemo applet = new EventDistributionsJSynDemo();
        AppletFrame frame = new AppletFrame("Event Density Example", applet);
        frame.setSize(400, 200);
        frame.setVisible(true);
        frame.setLayout(new FlowLayout());
        frame.test();
    }
}

class DensityJob extends MusicJob {
    private double eventDensity;
    private double ratio;
    private MusicShape musicShapeLog;

    public double start(double playTime) {
        musicShapeLog = new MusicShape(4);
        musicShapeLog.useStandardDimensionNameSpace();
        return playTime;
    }

    public double repeat(double playTime) {
        double dur = EventDistributions.genEntryDelayMyhill(eventDensity, ratio);
        double pitch = 60 + JMSLRandom.choose(12);
        double amplitude = JMSLRandom.choose(0.1, 0.6);
        double[] dar = { dur, pitch, amplitude, dur * 1.25 };
        musicShapeLog.add(dar);
        return getInstrument().play(playTime, 1.0, dar);
    }

    public void setRatio(double r) {
        ratio = r;
    }

    public void setDensity(double d) {
        eventDensity = d;
    }

    /**
     * Get MusicShape loaded with algorithmically generated elements (used by subclass
     * EventDistributionsJSynDemoWithScore )
     * 
     * @return Returns the musicShapeLog.
     */
    public MusicShape getMusicShapeLog() {
        return musicShapeLog;
    }
}