www.pudn.com > src.rar > BlueFishButtonCanvas.java

/* 
* Copyright (c) 1996, 1997 Bill Venners. All Rights Reserved. 
* 
* This Java source file is part of the Interactive Illustrations Web 
* Site, which is delivered in the applets directory of the CD-ROM 
* that accompanies the book "Inside the Java Virtual Machine" by Bill 
* Venners, published by McGraw-Hill, 1997,ISBN: 0-07-913248-0. This 
* source file is provided for evaluation purposes only, but you can 
* redistribute it under certain conditions, described in the full 
* copyright notice below. 
* 
* Full Copyright Notice: 
* 
* All the web pages and Java applets delivered in the applets 
* directory of the CD-ROM, consisting of ".html," ".gif," ".class," 
* and ".java" files, are copyrighted (c) 1996, 1997 by Bill 
* Venners, and all rights are reserved.  This material may be copied 
* and placed on any commercial or non-commercial web server on any 
* network (including the internet) provided that the following 
* guidelines are followed: 
* 
* a. All the web pages and Java Applets (".html," ".gif," ".class," 
* and ".java" files), including the source code, that are delivered 
* in the applets directory of the CD-ROM that 
* accompanies the book must be published together on the same web 
* site. 
* 
* b. All the web pages and Java Applets (".html," ".gif," ".class," 
* and ".java" files) must be published "as is" and may not be altered 
* in any way. 
* 
* c. All use and access to this web site must be free, and no fees 
* can be charged to view these materials, unless express written 
* permission is obtained from Bill Venners. 
* 
* d. The web pages and Java Applets may not be distributed on any 
* media, other than a web server on a network, and may not accompany 
* any book or publication. 
* 
* BILL VENNERS MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE 
* SUITABILITY OF THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING 
* BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, 
* FITNESS FOR PARTICULAR PURPOSE, OR NON-INFRINGEMENT.  BILL VENNERS 
* SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY A LICENSEE AS A 
* RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS 
* DERIVATIVES. 
*/ 
import java.awt.*; 
 
/** 
* This class is the canvas upon which a blue fish is drawn 
* that sits just above the "new BlueFish()" button on the 
* allocate fish panel. 
* 
* @author  Bill Venners 
*/ 
class BlueFishButtonCanvas extends Canvas { 
 
    private final int fishButtonInset = 5; 
    private MediumBlueFishIcon mediumBlueFishIcon = new MediumBlueFishIcon(false); 
 
    BlueFishButtonCanvas() { 
        //setBackground(Color.white); 
    } 
 
    public Dimension minimumSize() { 
        Dimension fishButtonDim = new Dimension(0, 0); 
        fishButtonDim.width = mediumBlueFishIcon.getFishWidth() + (2 * fishButtonInset); 
        fishButtonDim.height = mediumBlueFishIcon.getFishHeight() + (2 * fishButtonInset); 
        return fishButtonDim; 
    } 
 
    public Dimension preferredSize() { 
        return minimumSize(); 
    } 
 
    public void paint(Graphics g) { 
 
        // First calculate the positions of the goodies on the canvas based on the width 
        // and height of the canvas. 
        Dimension dim = size(); 
 
        int xFishStart = (dim.width - mediumBlueFishIcon.getFishWidth()) / 2; 
        if (xFishStart < 0) { 
            xFishStart = 0; 
        } 
 
        int yFishStart = (dim.height - mediumBlueFishIcon.getFishHeight()) / 2; 
        if (yFishStart < 0) { 
            yFishStart = 0; 
        } 
 
        mediumBlueFishIcon.moveFish(xFishStart, yFishStart); 
 
        mediumBlueFishIcon.paint(g); 
    } 
 
}