/** 	
	FMSpectrumApplet.java

	GUI provides controls to plot spectrum of simple FM pair.
	
 * @author Phil Burk and Nick Didkovsky
 */
/*
 * (C) 1997 Phil Burk and Nick Didkovsky, All Rights Reserved
 * JMSL is based upon HMSL (C) Phil Burk, Larry Polansky and David Rosenboom.
 */

package jmsltutorial;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.Panel;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

import com.softsynth.jmsl.view.JMSLScrollbar;
import com.softsynth.jmsl.view.JMSLScrollbarProcessor;

public class FMSpectrumApplet extends JFrame implements JMSLScrollbarProcessor {

    FMSpectrumCalculator myFMSpectrumCalculator;
    SpectrumCanvas mySpectrumCanvas;

    JMSLScrollbar carrFreqScrollbar;
    JMSLScrollbar modAmpScrollbar;
    JMSLScrollbar modFreqScrollbar;
    JLabel carrFreqLabel;
    JLabel modAmpLabel;
    JLabel modFreqLabel;
    JLabel modIndexLabel;

    public void init() {
        myFMSpectrumCalculator = new FMSpectrumCalculator();
        carrFreqScrollbar = new JMSLScrollbar(this, (int) myFMSpectrumCalculator.getCarrierFreq(), 20, 20000);
        carrFreqScrollbar.setSize(320, 25);
        modAmpScrollbar = new JMSLScrollbar(this, (int) myFMSpectrumCalculator.getModAmp(), 0, 20000);
        modAmpScrollbar.setSize(320, 25);
        modFreqScrollbar = new JMSLScrollbar(this, (int) myFMSpectrumCalculator.getModFreq(), 20, 20000);
        modFreqScrollbar.setSize(320, 25);

        carrFreqLabel = new JLabel("Carrier Freq =" + myFMSpectrumCalculator.getCarrierFreq() + "    ");
        modAmpLabel = new JLabel("Mod Amp =" + myFMSpectrumCalculator.getModAmp() + "    ");
        modFreqLabel = new JLabel("Mod Freq =" + myFMSpectrumCalculator.getModFreq() + "    ");
        modIndexLabel = new JLabel("Modulation Index                    ");

        Panel controlPanel = new Panel();
        controlPanel.setLayout(new GridLayout(0, 1));

        JPanel p = new JPanel();
        p.add(carrFreqScrollbar);
        p.add(carrFreqLabel);
        controlPanel.add(p);

        p = new JPanel();
        p.add(modAmpScrollbar);
        p.add(modAmpLabel);
        controlPanel.add(p);

        p = new JPanel();
        p.add(modFreqScrollbar);
        p.add(modFreqLabel);
        controlPanel.add(p);

        p = new JPanel();
        p.add(modIndexLabel);
        controlPanel.add(p);

        setLayout(new BorderLayout());
        add(BorderLayout.SOUTH, controlPanel);

        mySpectrumCanvas = new SpectrumCanvas();
        add(BorderLayout.NORTH, mySpectrumCanvas);
    }

    public void start() {
        newSpectrum();
    }

    public void stop() {

    }

    void recalculateSpectrum() {
        myFMSpectrumCalculator.setModAmp((double) modAmpScrollbar.getValue());
        myFMSpectrumCalculator.setModFreq((double) modFreqScrollbar.getValue());
        myFMSpectrumCalculator.setCarrierFreq((double) carrFreqScrollbar.getValue());
        myFMSpectrumCalculator.calculateSpectrum();
    }

    void handleModFreq() {
        modFreqLabel.setText("Mod Freq =" + modFreqScrollbar.getValue());
    }

    void handleModAmp() {
        modAmpLabel.setText("Mod Amp =" + modAmpScrollbar.getValue());
    }

    void handleCarrFreq() {
        carrFreqLabel.setText("Carrier Freq =" + carrFreqScrollbar.getValue());
    }

    void setModIndexLabel() {
        modIndexLabel.setText("Modulation Index = " + myFMSpectrumCalculator.getIndexOfModulation());
    }

    void newSpectrum() {
        recalculateSpectrum();
        setModIndexLabel();
        mySpectrumCanvas.setSpectrum(myFMSpectrumCalculator.getSpectrum());
        mySpectrumCanvas.repaint();
    }

    public void JMSLScrollbarValueChanged(JMSLScrollbar jsb) {
        if (jsb == modFreqScrollbar)
            handleModFreq();
        if (jsb == modAmpScrollbar)
            handleModAmp();
        if (jsb == carrFreqScrollbar)
            handleCarrFreq();
        newSpectrum();
    }

    public static void main(String[] args) {
        FMSpectrumApplet toot = new FMSpectrumApplet();
        toot.init();
        toot.start();
        toot.pack();
        toot.setVisible(true);
        toot.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}