/*  * CVS identifier: *  * $Id: TitleUpdater.java,v 1.1.1.1 2002/07/22 09:26:45 grosbois Exp $ *  * Class:                   TitleUpdater *  * Description:             Thread to update display window title *  *  *  * COPYRIGHT: *  * This software module was originally developed by Rapha雔 Grosbois and * Diego Santa Cruz (Swiss Federal Institute of Technology-EPFL); Joel * Askel鰂 (Ericsson Radio Systems AB); and Bertrand Berthelot, David * Bouchard, F閘ix Henry, Gerard Mozelle and Patrice Onno (Canon Research * Centre France S.A) in the course of development of the JPEG2000 * standard as specified by ISO/IEC 15444 (JPEG 2000 Standard). This * software module is an implementation of a part of the JPEG 2000 * Standard. Swiss Federal Institute of Technology-EPFL, Ericsson Radio * Systems AB and Canon Research Centre France S.A (collectively JJ2000 * Partners) agree not to assert against ISO/IEC and users of the JPEG * 2000 Standard (Users) any of their rights under the copyright, not * including other intellectual property rights, for this software module * with respect to the usage by ISO/IEC and Users of this software module * or modifications thereof for use in hardware or software products * claiming conformance to the JPEG 2000 Standard. Those intending to use * this software module in hardware or software products are advised that * their use may infringe existing patents. The original developers of * this software module, JJ2000 Partners and ISO/IEC assume no liability * for use of this software module or modifications thereof. No license * or right to this software module is granted for non JPEG 2000 Standard * conforming products. JJ2000 Partners have full right to use this * software module for his/her own purpose, assign or donate this * software module to any third party and to inhibit third parties from * using this software module for non JPEG 2000 Standard conforming * products. This copyright notice must be included in all copies or * derivative works of this software module. *  * Copyright (c) 1999/2000 JJ2000 Partners. * */package jj2000.disp;import java.awt.*;/** * This class should run as an independent thread to update tha main * display window title with current image scroll position and * zoom. * */public class TitleUpdater implements Runnable {    /** The update perion, in milliseconds: 100 */    static final int UPDATE_T = 100;    /** The ImgScrollPane where the image is displayed */    ImgScrollPane isp;    /** The frame which title to update */    Frame win;    /** The base of the title */    String btitle;    /** The thread exits when this is true */    volatile public boolean done = false;    /**     * Instantiates the title updater. The title of 'win' will be     * regularly updated with the current zoom and scroll point. The     * current zoom and scroll point are added to the basic title     * given by 'btitle'.     *     * @param isp Where the image is displayed     *     * @param win The window which title to update     *     * @param btitle The base of the title.     * */    public TitleUpdater(ImgScrollPane isp, Frame win, String btitle) {        this.isp = isp;        this.win = win;        this.btitle = btitle;    }    /**     * The method that executes this thread. The method periodically     * updates the title, if necessary, and puts to sleep the thread     * for 100 msec. This method never returns. If the sleep of the     * thread is interrupted, the title will be updated earlier and     * the cycle will continue.     * */    public void run() {        // Periodically update the window title        Point lsp,sp;        float lzf,zf;        lsp = isp.getScrollPosition();        lzf = isp.getZoom();        while (!done) {            sp = isp.getScrollPosition();            zf = isp.getZoom();            // Update title only if necessary            if (zf != lzf || !sp.equals(lsp)) {                win.setTitle(btitle+                             " @ ("+(int)(sp.x/zf)+","+                             (int)(sp.y/zf)+") : "+isp.getZoom());            }            lsp = sp;            lzf = zf;            try {                Thread.currentThread().sleep(UPDATE_T);            }            catch (InterruptedException e) {            }        }    }}