graphicdisplaypanel.java

一个TSP问题的图形演示程序

/*
 *  This code is from the book:
 *
 *    Winder, R and Roberts, G (2000) Developing Java
 *    Software, second edition, John Wiley & Sons.
 *
 *  It is copyright (c) 2000 Russel Winder and Graham Roberts.
 */

import java.awt.* ;
import javax.swing.* ;
/**
 *  JPanel subclass used for displaying simulation images.  JPanel is
 *  subclassed to force its dimensions to be correct.
 *
 *  @version 2.0 19.2.1999
 *  @author Graham Roberts
 */
class GraphicDisplayPanel extends JPanel {
    /**
     *  Create a canvas with minimum dimensions.
     * 
     *  @param w widyh in pixels.
     *  @param h height in pixels.
     */
    public GraphicDisplayPanel(final int w, final int h) {
        size = new Dimension(w,h) ;
    }
    // Override these to do nothing.
    public void paint(Graphics g) {}
    public void update(Graphics g) {}
    /**
     *  @return preferred size of canvas.
     */
    public Dimension getPreferredSize() {
        return size ;
    }
    /**
     *  @return minimum size of canvas.
     */
    public Dimension getMinimumSize() {
        return size ;
    }
    private Dimension size ;
}