//  The ROMenu class
//  Creates a vertical URL menu that uses RollOver objects
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.net.*;

public class ROMenu extends Applet implements MouseListener
{
  RollOver[] choices;
  String[] urls;

  public void init()
  {
    Color Bg1 = getParameter("BG1") == null?  null :
                new Color(Integer.parseInt(getParameter("BG1"), 16));
    Color Fg1 = getParameter("FG1") == null? null :
                new Color(Integer.parseInt(getParameter("FG1"), 16));
    Color Bg2 = getParameter("BG2") == null?  null :
                new Color(Integer.parseInt(getParameter("BG2"), 16));
    Color Fg2 = getParameter("FG2") == null? null :
                new Color(Integer.parseInt(getParameter("FG2"), 16));

    // Count the number of items on the menu
    int items = 1;
    while ((getParameter("CAPTION"+items) != null) &&
           (getParameter("URL"+items) != null))
      items++;

    items --;
    // If no items on the menu, then leave
    if (items == 0)
    {
      add(new Label("No menu items"));
      return;
    }

    // Allocate the arrays
    choices = new RollOver[items];
    urls = new String[items];

    // Initialize the arrays
    setLayout(new GridLayout(items, 1));
    setFont(new Font("Helvetica", Font.BOLD, 24));
    for (int i = 0; i < items; i++ )
    {
      choices[i] = new RollOver(
        getParameter("CAPTION"+(i+1)), Label.CENTER, "", Fg1, Bg1, Fg2, Bg2);

      add(choices[i]);
      choices[i].addMouseListener(this);

      urls[i] = getParameter("URL"+(i+1));
    }
  }
  public void mouseClicked(MouseEvent e)
  {
    Label clicked = (Label) e.getSource();
    for (int i = 0; i < choices.length; i++)
      if (choices[i] == clicked)
      {
        try {
          URL u = null;
          if (urls[i].startsWith("http"))
            u = new URL(urls[i]);
          else
            u = new URL(getCodeBase(), urls[i]);
          getAppletContext().showDocument(u, "_blank");
        }
        catch (MalformedURLException ie)
        {
          showStatus("Sorry, don't recognize: " + urls[i]);
        }
      }
  }

  // -------------------------------------------------------
  //  Dummy methods for MouseListener interface
  // -------------------------------------------------------
  public void mousePressed(MouseEvent e)  { }
  public void mouseReleased(MouseEvent e) { }
  public void mouseEntered(MouseEvent e) { }
  public void mouseExited(MouseEvent e)  { }

}