/**
    * Copyright (c) 2011, The University of Southampton and the individual contributors.
    * 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 the University of Southampton 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 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 org.openimaj.demos.image;
  
  import java.awt.event.MouseEvent;
  import java.awt.event.MouseMotionListener;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  import javax.swing.JFrame;
  
  import org.openimaj.demos.Demo;
  import org.openimaj.image.DisplayUtilities;
  import org.openimaj.image.ImageUtilities;
  import org.openimaj.image.MBFImage;
  import org.openimaj.image.pixel.Pixel;
  import org.openimaj.image.processing.transform.PiecewiseMeshWarp;
  import org.openimaj.math.geometry.shape.Shape;
  import org.openimaj.math.geometry.shape.Triangle;
  import org.openimaj.util.pair.Pair;
  
  /**
   * Demonstrate the {@link PiecewiseMeshWarp}.
   * 
   * @author Jonathon Hare (jsh2@ecs.soton.ac.uk)
   * 
   */
  @Demo(
  		author = "Jonathon Hare",
  		description = "Demonstrates the OpenIMAJ piecewise mesh image warp processor. " +
  				"On the displayed image, drag the mouse to move the warp point.",
  		keywords = { "image", "distortion", "warp", "non-linear" },
  		title = "Non-Linear Image Warp",
  		icon = "/org/openimaj/demos/icons/image/bird-icon.png")
  public class PiecewiseMeshWarpDemo implements MouseMotionListener {
  	private JFrame frame;
  	private MBFImage img;
  
  	/**
  	 * Construct the demo
  	 * 
  	 * @throws IOException
  	 */
  	public PiecewiseMeshWarpDemo() throws IOException {
  		img = ImageUtilities.readMBF(getClass().getResource("/org/openimaj/demos/image/bird.png"));
  		frame = DisplayUtilities.displaySimple(img);
  
  		frame.addMouseMotionListener(this);
  	}
  
  	protected void updateImage(Pixel newCentre) {
  		final Pixel p1 = new Pixel(0, 0);
  		final Pixel p2 = new Pixel(img.getWidth(), 0);
  		final Pixel p3 = new Pixel(img.getWidth(), img.getHeight());
  		final Pixel p4 = new Pixel(0, img.getHeight());
  		final Pixel p5 = new Pixel(img.getWidth() / 2, img.getHeight() / 2);
  
  		final Pixel np1 = new Pixel(0, 0);
  		final Pixel np2 = new Pixel(img.getWidth(), 0);
  		final Pixel np3 = new Pixel(img.getWidth(), img.getHeight());
  		final Pixel np4 = new Pixel(0, img.getHeight());
  		final Pixel np5 = newCentre;
  
  		final List<Pair<Shape>> matchingRegions = new ArrayList<Pair<Shape>>();
  		matchingRegions.add(new Pair<Shape>(new Triangle(p1, p2, p5), new Triangle(np1, np2, np5)));
  		matchingRegions.add(new Pair<Shape>(new Triangle(p2, p3, p5), new Triangle(np2, np3, np5)));
  		matchingRegions.add(new Pair<Shape>(new Triangle(p3, p4, p5), new Triangle(np3, np4, np5)));
  		matchingRegions.add(new Pair<Shape>(new Triangle(p4, p1, p5), new Triangle(np4, np1, np5)));
  
  		DisplayUtilities.display(img.process(new PiecewiseMeshWarp<Float[], MBFImage>(matchingRegions)), frame);
  	}
 
 	@Override
 	public void mouseDragged(MouseEvent e) {
 		final Pixel p = new Pixel(e.getX(), e.getY());
 		updateImage(p);
 	}
 
 	@Override
 	public void mouseMoved(MouseEvent e) {
 
 	}
 
 	/**
 	 * The main method
 	 * 
 	 * @param args
 	 *            ignored
 	 * @throws IOException
 	 */
 	public static void main(String[] args) throws IOException {
 		new PiecewiseMeshWarpDemo();
 	}
 }