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

public class GraphicEqualizer extends Frame
{
    int m_numBands;
    Panel []m_bandPanels;
    Scrollbar []m_bands;
    ChangeField []m_fields;
    
    
    GraphicEqualizer(int numOfBands) {
        m_numBands = numOfBands;
        
        // setup frame
        setSize(300, 300);
        setLayout(new GridLayout(1, numOfBands));
        
        m_bandPanels = new Panel[m_numBands];
        m_bands = new Scrollbar[m_numBands];
        m_fields = new ChangeField[m_numBands];
        
        // create band controls
        for (int i = 0; i < numOfBands; i++) {
            BorderLayout layout = new BorderLayout();
            m_bandPanels[i] = new Panel(layout);
            m_bands[i] = new Scrollbar(Scrollbar.VERTICAL, 100, -5, -200, 400);
            m_bandPanels[i].add("Center", m_bands[i]);
            m_fields[i] = new ChangeField();
            m_bands[i].addAdjustmentListener(m_fields[i]);
            m_bandPanels[i].add("North", m_fields[i]);
            add(m_bandPanels[i]);
            // int orientation, int value, int visible, int minimum, int maximum
        }
    }
    
    Vector getBands() {
        Vector returnVector = new Vector();
        
        for (int i = 0; i < m_numBands; i++) {
            float value = m_fields[i].getValue();
            returnVector.addElement(new Float(value));
        }
        
        return returnVector;
    }
}