/*

 *

 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 *   - Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 *

 *   - 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.

 *

 *   - Neither the name of Oracle nor the names of its

 *     contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER OR

 * 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

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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

package java2d;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import javax.swing.JPanel;

import javax.swing.border.EtchedBorder;

/**

 * A convenience class for demos that use Custom Controls.  This class

 * sets up the thread for running the custom control.  A notifier thread

 * is started as well, a flashing 2x2 rect is drawn in the upper right corner

 * while the custom control thread continues to run.

 */

@SuppressWarnings("serial")

public abstract class CustomControls extends JPanel implements Runnable {

    protected Thread thread;

    protected boolean doNotifier;

    private CCNotifierThread ccnt;

    private String name = "foo.bar Demo";

    private static final Color blue = new Color(204, 204, 255);

    public CustomControls() {

        setBorder(new EtchedBorder());

        addMouseListener(new MouseAdapter() {

            @Override

            public void mouseClicked(MouseEvent e) {

                if (thread == null) { start(); } else { stop(); }

            }

        });

    }

    public CustomControls(String name) {

        this();

        this.name = name + " Demo";

    }

    @Override

    public void paintComponent(Graphics g) {

        super.paintComponent(g);

        g.setColor(doNotifier ? blue : Color.gray);

        g.fillRect(getSize().width-2, 0, 2, 2);

    }

    public void start() {

        if (thread == null) {

            thread = new Thread(this);

            thread.setPriority(Thread.MIN_PRIORITY);

            thread.setName(name + " ccthread");

            thread.start();

            (ccnt = new CCNotifierThread()).start();

            ccnt.setName(name + " ccthread notifier");

        }

    }

    public synchronized void stop() {

        if (thread != null) {

            thread.interrupt();

            if (ccnt != null) {

                ccnt.interrupt();

            }

        }

        thread = null;

    }

    // Custom Controls override the run method

    @Override

    public void run() {

    }

    /**

     * Notifier that the custom control thread is running.

     */

    class CCNotifierThread extends Thread {

        @Override

        @SuppressWarnings("SleepWhileHoldingLock")

        public void run() {

            while (thread != null) {

                doNotifier = !doNotifier;

                repaint();

                try {

                    Thread.sleep(444);

                } catch (Exception ex) {

                    break;

                }

            }

            doNotifier = false; repaint();

        }

    }

}