squareicon.java

java tutorial.sun公司官方出品。java入门书籍。最新版

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */ 

package QandE;

import javax.swing.Icon;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;

/* 
 * XMarksTheSpot is used by the ButtonDemo version used by the  
 * answer to exercise 2 of the Performing Custom Painting lesson:
 * http://java.sun.com/docs/books/tutorial/uiswing/QandE/questions-ch6.html
 */
public class SquareIcon implements Icon {
    private static final int SIZE = 10;
        
    public void paintIcon(Component c, Graphics g,
                          int x, int y) {
        if (c.isEnabled()) {
            g.setColor(Color.RED);
        } else {
            g.setColor(Color.GRAY);
        }
        
        g.fillRect(x, y, SIZE, SIZE);
    }
    
    public int getIconWidth() {
        return SIZE;
    }
    
    public int getIconHeight() {
        return SIZE;
    }
}