package KinematicSimulator;

import java.awt.Graphics;
import java.util.Iterator;
import java.util.Vector;
import javax.swing.JPanel;

/**
 * Viewer class listens to the data changed event and display the lastest
 * data on the window.
 *
 * @author Helena
 */

public class SimulatorViewer extends JPanel implements ViewerListener
{

    Vector m_ballList = null;

    public void paint(Graphics g)
    {

        g.clearRect(
            this.getX(),
            this.getY(),
            this.getWidth(),
            this.getHeight());

        if (m_ballList != null)
        {
            Iterator i = m_ballList.iterator();
            while (i.hasNext())
            {
                Ball b = (Ball) i.next();
                b.draw(g);
            }

        }
    }

    public void DataChanged(Vector data)
    {

        m_ballList = data;

        this.repaint();
    }

}