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628 adamjking 1
/*
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 * @(#)Blinker.java beta8   2006/04/23
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 *
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 * Copyright (C) 2008   Adam King (adamjking@optusnet.com.au)
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 *
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 * This application is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This application is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this application; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 */
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package org.midibox.utils.gui;
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import java.util.Observable;
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public class Blinker extends Observable implements Runnable {
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    private int delay;
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    private boolean pulse = false;
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    private transient Thread runner = null;
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    private boolean cancelled = false;
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    public Blinker(int frameRate) {
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        delay = 1000 / frameRate;
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        reset();
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    }
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    private void reset() {
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        runner = new Thread(this);
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        // runner.setDaemon(true);
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        runner.start();
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    }
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    public void run() {
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        long tm = System.currentTimeMillis();
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        while (!cancelled) {
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            try {
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                pulse = !pulse;
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                setChanged();
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                notifyObservers();
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                clearChanged();
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                Thread.sleep(Math.max(0, tm - System.currentTimeMillis()));
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                tm += delay;
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            } catch (InterruptedException e) {
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                break;
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            }
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        }
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        return;
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    }
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    public void cancel() {
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        cancelled = true;
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    }
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}