import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;

/**
   A class node in a class diagram.
*/
public class ClassNode extends RectangularNode
{
   /**
      Construct a class node with a default size
   */
   public ClassNode()
   {
      name = new MultiLineString();
      name.setSize(MultiLineString.LARGE);
      attributes = new MultiLineString();
      attributes.setJustification(MultiLineString.LEFT);
      methods = new MultiLineString();
      methods.setJustification(MultiLineString.LEFT);
      setBounds(new Rectangle2D.Double(0, 0, DEFAULT_WIDTH, DEFAULT_HEIGHT));
      midHeight = DEFAULT_COMPARTMENT_HEIGHT;
      botHeight = DEFAULT_COMPARTMENT_HEIGHT;
   }

   public void draw(Graphics2D g2)
   {
      layout(g2);
      Rectangle2D top = new Rectangle2D.Double(getBounds().getX(),
         getBounds().getY(), getBounds().getWidth(), 
         getBounds().getHeight() - midHeight - botHeight);
      g2.draw(top);
      name.draw(g2, top);
      Rectangle2D mid = new Rectangle2D.Double(top.getX(),
         top.getMaxY(), top.getWidth(), midHeight);
      g2.draw(mid);
      attributes.draw(g2, mid);
      Rectangle2D bot = new Rectangle2D.Double(top.getX(),
         mid.getMaxY(), top.getWidth(), botHeight);
      g2.draw(bot);
      methods.draw(g2, bot);
   }

   /**
      Recomputes the layout of this node.
      @param g2 the graphics context
   */
   public void layout(Graphics2D g2)
   {
      Rectangle2D min = new Rectangle2D.Double(0, 0,
         DEFAULT_WIDTH, DEFAULT_COMPARTMENT_HEIGHT);
      Rectangle2D top = name.getBounds(g2); 
      top.add(min);
      Rectangle2D mid = attributes.getBounds(g2);
      Rectangle2D bot = methods.getBounds(g2);

      midHeight = mid.getHeight();
      botHeight = bot.getHeight();
      if (midHeight == 0 && botHeight == 0)
      {
         top.add(new Rectangle2D.Double(0, 0, 
                    DEFAULT_WIDTH, 
                    3 * DEFAULT_COMPARTMENT_HEIGHT));
      }
      else
      {
         mid.add(min);
         bot.add(min);
         midHeight = mid.getHeight();
         botHeight = bot.getHeight();
      }

      Rectangle2D b = new Rectangle2D.Double(
         getBounds().getX(), getBounds().getY(),
         Math.max(top.getWidth(), Math.max(mid.getWidth(),
            bot.getWidth())), 
         top.getHeight() + midHeight + botHeight);
      setBounds(b);
   }

   /**
      Sets the name property value.
      @param newValue the class name
   */
   public void setName(MultiLineString newValue)
   {
      name = newValue;
   }

   /**
      Gets the name property value.
      @return the class name
   */
   public MultiLineString getName()
   {
      return name;
   }

   /**
      Sets the attributes property value.
      @param newValue the attributes of this class
   */
   public void setAttributes(MultiLineString newValue)
   {
      attributes = newValue;
   }

   /**
      Gets the attributes property value.
      @return the attributes of this class
   */
   public MultiLineString getAttributes()
   {
      return attributes;
   }

   /**
      Sets the methods property value.
      @param newValue the methods of this class
   */
   public void setMethods(MultiLineString newValue)
   {
      methods = newValue;
   }

   /**
      Gets the methods property value.
      @return the methods of this class
   */
   public MultiLineString getMethods()
   {
      return methods;
   }

   public Object clone()
   {
      ClassNode cloned = (ClassNode) super.clone();
      cloned.name = (MultiLineString) name.clone();
      cloned.methods = (MultiLineString) methods.clone();
      cloned.attributes = (MultiLineString) attributes.clone();
      return cloned;
   }

   private double midHeight;
   private double botHeight;
   private MultiLineString name;
   private MultiLineString attributes;
   private MultiLineString methods;

   private static int DEFAULT_COMPARTMENT_HEIGHT = 20;
   private static int DEFAULT_WIDTH = 80;
   private static int DEFAULT_HEIGHT = 60;
}