/* * Copyright (c) 1996-1999 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 2 Virtual Machine" by Bill * Venners, published by McGraw-Hill, 1999, ISBN: 0-07-135093-4. 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) 1996-1999 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 panel that holds the entire allocate * fish user interface, including the buttons at the bottom * and the canvas on which the handle and object pools are * drawn. * * @author Bill Venners */ class AllocateFishPanel extends Panel { GCHeap gcHeap; HeapOfFishTextArea controlPanelTextArea; PoolsCanvas poolsCanvas; AllocateFishPanel(GCHeap heap, HeapOfFishTextArea ta) { gcHeap = heap; controlPanelTextArea = ta; setBackground(Color.blue); setLayout(new BorderLayout()); poolsCanvas = new PoolsCanvas(gcHeap); add("South", new AllocateFishButtonPanel()); add("Center", poolsCanvas); } public boolean action(Event evt, Object arg) { if (evt.target instanceof Button) { String bname = (String) arg; Dimension canvasDim = poolsCanvas.size(); if (bname.equals(HeapOfFishStrings.newRedFish)) { FishIcon fish = new BigRedFishIcon(false); int newFish = gcHeap.allocateObject(12, fish); if (newFish > 0) { ObjectHandle oh = gcHeap.getObjectHandle(newFish); gcHeap.setObjectPool(oh.objectPos, 0); gcHeap.setObjectPool(oh.objectPos + 1, 0); gcHeap.setObjectPool(oh.objectPos + 2, 0); controlPanelTextArea.setText(HeapOfFishStrings.newRedFishAllocated); } else { controlPanelTextArea.setText(HeapOfFishStrings.newRedFishNotAllocated); } poolsCanvas.repaint(); } else if (bname.equals(HeapOfFishStrings.newBlueFish)) { FishIcon fish = new MediumBlueFishIcon(false); int newFish = gcHeap.allocateObject(8, fish); if (newFish > 0) { ObjectHandle oh = gcHeap.getObjectHandle(newFish); gcHeap.setObjectPool(oh.objectPos, 0); gcHeap.setObjectPool(oh.objectPos + 1, 0); controlPanelTextArea.setText(HeapOfFishStrings.newBlueFishAllocated); } else { controlPanelTextArea.setText(HeapOfFishStrings.newBlueFishNotAllocated); } poolsCanvas.repaint(); } else if (bname.equals(HeapOfFishStrings.newYellowFish)) { FishIcon fish = new LittleYellowFishIcon(false); int newFish = gcHeap.allocateObject(4, fish); if (newFish > 0) { ObjectHandle oh = gcHeap.getObjectHandle(newFish); gcHeap.setObjectPool(oh.objectPos, 0); controlPanelTextArea.setText(HeapOfFishStrings.newYellowFishAllocated); } else { controlPanelTextArea.setText(HeapOfFishStrings.newYellowFishNotAllocated); } poolsCanvas.repaint(); } } return true; } }