package graph.rep;
import graph.*;
import java.awt.*;

/**
 * A data structure for storing and painting the graphical
 * representation of an Element.  This is stored in a separate
 * object which makes it easier to extend or remove.<p>
 *
 * There is also a "selected" representation which is useful
 * for most interactive programs.
 *
 * @see NodeRep
 * @see EdgeRep
 * @see LabelRep
 * @author Michael Shilman (michaels@eecs.berkeley.edu)
 * @version $Id$
 */
public abstract class BaseRep {
	//XXX do we need these?
	public static final int NO_WIDTH = -1;
	public static final int NO_HEIGHT = -1;
	
	/**
 	 * To allow for two representations: one when
 	 * the object is selected, one when it is not
 	 * selected.
 	 */
    public boolean selected = false;
	
	/**
 	 * If false, don't paint this.
 	 */
	public boolean show = true;
	
	/**
 	 * Paint this at the specified location (overridden by 
 	 * the "show" member variable).
 	 */	
	public abstract void paint(Graphics g, double x, double y);
	
	/**
 	 * Paint this in the specified bounding box (overridden by 
 	 * the "show" member variable).
 	 */	
	public abstract void paint(Graphics g, double x, double y, double w, double h);
	
	/**
	 * Select or deselect the element that this represents.
	 */
    public void select(boolean val) {
    	selected = val;
    }
}