/*
 * Created by Nick on Dec 5, 2004
 *
 */
package jmslexamples.jsyn;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.Vector;

import javax.swing.JApplet;

import com.didkovsky.portview.PVCheckbox;
import com.didkovsky.portview.PVPanel;
import com.didkovsky.portview.swing.ViewFactorySwing;
import com.softsynth.jmsl.JMSL;
import com.softsynth.jmsl.JMSLMixerContainer;
import com.softsynth.jmsl.jsyn.JSynInsFromClassName;
import com.softsynth.jmsl.jsyn.JSynMusicDevice;
import com.softsynth.jmsl.util.TuningTable;
import com.softsynth.jmsl.view.PVPanelAdapter;
import com.softsynth.jsyn.circuits.FilteredSawtoothBL;

/**
 * Use checkboxes as virtual keys for any tuning. Keys show frequency. From an
 * idea by Paul Reiners
 * 
 * @author Nick Didkovsky, (c) 2004 All rights reserved, Email:
 *         didkovn@mail.rockefeller.edu
 *  
 */
public class VirtualKeyboard extends JApplet implements ItemListener {

    Vector virtualKeys;

    TuningTable tuning;

    JSynInsFromClassName instrument;

    JMSLMixerContainer mixer;

    public void start() {
        JMSL.setIsApplet(true);
        JMSL.setViewFactory(new ViewFactorySwing());
        JSynMusicDevice.instance().open();
        getContentPane().setLayout(new BorderLayout());
        buildTuning();
        buildVirtualKeys();
        buildInstrument();
        buildMixer();
    }

    private void buildMixer() {
        mixer = new JMSLMixerContainer();
        mixer.start();
        mixer.addInstrument(instrument);
        getContentPane().add(BorderLayout.SOUTH, mixer.getPanAmpControlPanel());
    }

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

    private void buildInstrument() {
        instrument = new JSynInsFromClassName(16, FilteredSawtoothBL.class.getName());
        instrument.setTuning(tuning); // !!!!
        instrument.setName("Band Limitted Sawtooth");
    }

    private void buildTuning() {
        double[] frequencies = { 274.8, 298.8, 316.6, 330.0, 358.4, 368.2, 421.1, 452.4, 482.6, 533.9 };
        tuning = new TuningTable(frequencies);
    }

    private void buildVirtualKeys() {
        virtualKeys = new Vector();
        PVPanel panel = new PVPanelAdapter();
        panel.setLayout(new GridLayout(1, 0));
        for (int i = 0; i < tuning.getStepsPerOctave(); i++) {
            double pitch = indexToPitch(i);
            double frequency = tuning.getFrequency(pitch);
            PVCheckbox cb = JMSL.getViewFactory().createCheckbox(frequency + "");
            virtualKeys.add(cb);
            panel.add(cb.getComponent());
            cb.addItemListener(this);
        }
        getContentPane().add(BorderLayout.NORTH, panel.getComponent());
    }

    private double indexToPitch(int i) {
        return tuning.getReferencePitch() + i;
    }

    public void itemStateChanged(ItemEvent ev) {
        Object source = ev.getSource();
        boolean state = ((PVCheckbox) source).getState();
        int index = virtualKeys.indexOf(source);
        double pitch = indexToPitch(index);
        double dur = 1.0; // not important since virtual key controls sustain
        double amplitude = 0.4;
        double hold = 1.0; // not important since virtual key controls sustain
        double[] data = { dur, pitch, amplitude, hold };
        if (state) {
            instrument.on(JMSL.now(), 1.0, data);
        } else {
            instrument.off(JMSL.now(), 1.0, data);
        }
        System.out.println("pitch = " + pitch + ", selected? " + state);
    }
}