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/*
 * @(#)Blinker.java beta8   2006/04/23
 *
 * Copyright (C) 2008   Adam King (adamjking@optusnet.com.au)
 *
 * This application is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This application 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this application; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */


package org.midibox.utils.gui;

import java.util.Observable;

public class Blinker extends Observable implements Runnable {

    private int delay;

    private boolean pulse = false;

    private transient Thread runner = null;

    private boolean cancelled = false;

    public Blinker(int frameRate) {
        delay = 1000 / frameRate;
        reset();
    }

    private void reset() {
        runner = new Thread(this);
        // runner.setDaemon(true);
        runner.start();
    }

    public void run() {

        long tm = System.currentTimeMillis();

        while (!cancelled) {
            try {

                pulse = !pulse;

                setChanged();
                notifyObservers();
                clearChanged();

                Thread.sleep(Math.max(0, tm - System.currentTimeMillis()));
                tm += delay;
            } catch (InterruptedException e) {
                break;
            }
        }
        return;
    }

    public void cancel() {
        cancelled = true;
    }
}