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/* * Copyright (c) 1997, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /** * An EventQueue subclass which adds selective tracing of events as they * are posted to an EventQueue.  Tracing is globally enabled and disabled * by the AWT.TraceEventPosting property in awt.properties.  <P> * * The optional AWT.NoTraceIDs property defines a list of AWTEvent IDs * which should not be traced, such as MouseEvent.MOUSE_MOVED or PaintEvents. * This list is declared by specifying the decimal value of each event's ID, * separated by commas. * * @author  Thomas Ball */ package sun.awt; import java.awt.EventQueue;import java.awt.AWTEvent;import java.awt.Toolkit;import java.util.StringTokenizer; public class TracedEventQueue extends EventQueue {     // Determines whether any event tracing is enabled.    static boolean trace = false;     // The list of event IDs to ignore when tracing.    static int suppressedIDs[] = null;     static {        String s = Toolkit.getProperty("AWT.IgnoreEventIDs", "");        if (s.length() > 0) {            StringTokenizer st = new StringTokenizer(s, ",");            int nIDs = st.countTokens();            suppressedIDs = new int[nIDs];            for (int i = 0; i < nIDs; i++) {                String idString = st.nextToken();                try {                    suppressedIDs[i] = Integer.parseInt(idString);                } catch (NumberFormatException e) {                    System.err.println("Bad ID listed in AWT.IgnoreEventIDs " +                                       "in awt.properties: \"" +                                       idString + "\" -- skipped");                    suppressedIDs[i] = 0;                }            }        } else {            suppressedIDs = new int[0];        }    }     public void postEvent(AWTEvent theEvent) {        boolean printEvent = true;        int id = theEvent.getID();        for (int i = 0; i < suppressedIDs.length; i++) {            if (id == suppressedIDs[i]) {                printEvent = false;                break;            }        }        if (printEvent) {            System.out.println(Thread.currentThread().getName() +                               ": " + theEvent);        }        super.postEvent(theEvent);    }}