/**
 * Copyright (c) 2009 Mark S. Kolich
 * http://mark.koli.ch
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
*/

package com.kolich.swing;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.Timer;

import org.apache.commons.io.IOUtils;

public class SwingTimerDemo extends JFrame implements Runnable {
	
	private static final long serialVersionUID = 1074695564475467373L;
	
	private static final String FRAME_TITLE = "javax.swing.Timer Demo";
	private static final int TIMER_THREAD_INTERVAL = 200; // 200 ms

	private Timer timer_;
	
	public SwingTimerDemo() {
		super(FRAME_TITLE);
	}

	public void run() {
		
		final JPanel viewPort = new JPanel();
		viewPort.setLayout(new GridLayout(2,1));
		viewPort.setOpaque(true);
		viewPort.setBackground(Color.BLACK);
		viewPort.setPreferredSize(new Dimension(300, 500));
		
		getContentPane().add(viewPort);
		
		final JLabel ani = new JLabel();
		ani.setHorizontalAlignment(JLabel.CENTER);
		ani.setVerticalAlignment(JLabel.CENTER);
		ani.setIcon(AnimateLoop.getFirstFrame());
		viewPort.add(ani);
		
		final JButton control = new JButton("Start");
		viewPort.add(control);
		control.addActionListener(new ActionListener(){
			@Override
			public void actionPerformed(ActionEvent e) {
				if(timer_ == null) {
					timer_ = new Timer(TIMER_THREAD_INTERVAL,
									new AnimateLoop(ani));
					timer_.start();
					control.setText("Stop");
				} else {
					timer_.stop();
					timer_ = null;
					control.setText("Start");
				}
			}
		});
		
		/*
		final JButton exit = new JButton("Exit");
		viewPort.add(exit);
		exit.addActionListener(new ActionListener(){
			@Override
			public void actionPerformed(ActionEvent e) {
				System.exit(0);
			}
		});
		*/
		
		pack();
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setLocationRelativeTo(null);
		setResizable(false);
		setVisible(true);
		
	}
	
	public static void main(String[] args) {		
		SwingUtilities.invokeLater(new SwingTimerDemo());
	}
	
	/**
	 * This is the class that actually does the animation work.
	 * @author Mark Kolich
	 *
	 */
	public static class AnimateLoop implements ActionListener {
		
		private static final String FRAMES_DIR = "frames";	
		private static final String GIF_EXTENSION = ".gif";
		
		private static final File framesDir__;
		private static final List<ImageIcon> frames__;
		static {
			frames__ = new ArrayList<ImageIcon>();
			framesDir__ = new File(FRAMES_DIR);
			// Find all of the .gif files in our frames/ directory.
			// We only animated over .gif files; you can, of course,
			// animate over whatever image types you want as long
			// as they can be converted into an ImageIcon.
			final File[] frames = framesDir__.listFiles(new FileFilter() {
				public boolean accept ( File file ) {
					return !file.getName().startsWith(".") &&
								file.getName().endsWith(GIF_EXTENSION);
				}
			});
			for(File frame : frames) {
				frames__.add(getImageIcon(frame));
			}
		}

		private JLabel label_;
		private int index_;
		
		/**
		 * The JLabel is the label this animation
		 * loop will animate on.
		 * @param label
		 */
		public AnimateLoop(JLabel label) {
			label_ = label;
			index_ = 0;
		}
		
		/**
		 * Called every time the action event fires.
		 */
		@Override
		public void actionPerformed(ActionEvent e) {
			label_.setIcon(frames__.get(index_));
			index_ += 1;
			if(index_ > frames__.size() - 1) {
				index_ = 0;
			}
		}
		
		private static final ImageIcon getImageIcon(final File f) {
			FileInputStream fis = null;
			try {
				fis = new FileInputStream(f);
				return new ImageIcon(IOUtils.toByteArray(fis));
			} catch (Exception e) {
				return null;
			}
			finally {
				try {
					if(fis != null) {
						fis.close();
					}
				} catch (IOException e) { }
			}
		}
		
		public static final ImageIcon getFirstFrame() {
			return frames__.get(0);
		}
		
	}

}