package rpi.goldsd.graph;

/**
 * The <tt>Drawable</tt> interface is used to identify graph-related
 * classes that may be displayed in a graphical application
 * (i.e. <b>Graph Draw</b>).  Currently, three methods are defined in
 * the Drawable interface: one to obtain the edges of the
 * graph-related object; one to obtain the vertices; and
 * another to obtain the name of the graph-related object.
 *
 * @see GraphBase
 * @see Path
 * @see Algorithms
 * @version 2.0, 4/19/98
 * @author David Goldschmidt
 */
public interface Drawable
{
  /**
   * Provides an enumeration of the edges of the graph-related object.
   * @return an enumeration of the edges of the graph-related object.
   */
  public java.util.Enumeration edges();


  /**
   * Returns the name of this graph-related object.
   * @return the name of this graph-related object.
   */
  public String name();


  /**
   * Provides an enumeration of the vertices of the graph-related object.
   * @return an enumeration of the vertices of the graph-related object.
   */
  public java.util.Enumeration vertices();
}