/**************************************************************************
* Copyright (c) 2001, 2002, 2003 by Punch Telematix. All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* 1. Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* 2. 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. *
* 3. Neither the name of Punch Telematix nor the names of *
* other contributors may be used to endorse or promote products *
* derived from this software without specific prior written permission.*
* *
* THIS SOFTWARE IS PROVIDED ``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 PUNCH TELEMATIX OR OTHER 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 LIABILITY, *
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE *
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN *
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
**************************************************************************/
package com.acunia.wonka.rudolph;
public final class Painter implements Runnable {
private static Painter thePainter;
private int priority = Thread.MAX_PRIORITY;
boolean keepOnGoing;
private Thread thread;
private Thread shutdown;
private Painter() {
}
public static synchronized Painter getInstance() {
if (thePainter == null) thePainter = new Painter();
return thePainter;
}
private native void paint();
public void run() {
while (keepOnGoing) {
try {
paint();
Thread.sleep(20);
}
catch (InterruptedException ie) {
}
catch (Exception exc) {
try {
exc.printStackTrace();
}
catch (Exception exc2) {
}
}
catch (Error err) {
try {
System.out.println("Painter thread threw " + err + "!");
err.printStackTrace();
}
finally {
System.exit(253);
}
}
}
}
public void start() {
if(!keepOnGoing) {
keepOnGoing = true;
shutdown = new Thread("Painter shutdown hook") {
public void run() {
keepOnGoing = false;
}
};
Runtime.getRuntime().addShutdownHook(shutdown);
thread = new Thread(this, "Picasso");
thread.setPriority(priority);
thread.setDaemon(false);
thread.start();
}
}
public void stop() {
Runtime.getRuntime().removeShutdownHook(shutdown);
keepOnGoing = false;
thread = null;
}
}