/**
 * 
 */
package image.create;

import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;
import javax.swing.event.*;

import image.create.CreateImage;

/**
 * @author John
 *
 */
public class Poggendorf extends CreateImage {
	static final long serialVersionUID = 0;

	// name of illusion
	private final static String NAME = "Poggendorf Illusion";

	// the basic poggendorf color parameters
	private Color back = Color.LIGHT_GRAY;
	private Color bar = Color.DARK_GRAY;
	private Color line = Color.black;
	
	private double angle = 65;
	private double posRight = 0; // off set from intersection
	private double barWidth = 0.15;  // proportion of whole
	
	// the image to be returned
	private Image poggendorf;
	
	// image manipulation objects
	// angle
	private JPanel anglePanel = new JPanel();
	private JLabel angleLabel = new JLabel("Angle");
	private JSlider angleSlider = new JSlider(0,85,(int)angle);
	private JLabel angleValLabel = new JLabel(" = "+angle);
	// position of right line
	private JPanel posPanel = new JPanel();
	private JLabel posLabel = new JLabel("Move Right Line");
	private JButton plus10 = new JButton("+10");
	private JButton plus1 = new JButton("+1");
	private JButton minus1 = new JButton("-1");
	private JButton minus10 = new JButton("-10");
	private JPanel resetRightPanel = new JPanel();
	private JButton resetRight = new JButton("Reset");
	// width of bar
	private JPanel barWPanel = new JPanel();
	private JLabel barWLabel =  new JLabel("Bar Width");
	private JSlider barWSlider = new JSlider(0,100,
			(int)(barWidth*100.0));
	private JLabel barWValLabel = new JLabel(" = "+
			barWSlider.getValue()+"%");
	
	// the control panel to be returned
	private JPanel control = new JPanel();
	
	// empty constructor
	public Poggendorf(){
		setSize(width,height);
		setupControl();
	}
	
	private void setupControl(){
		control.setLayout(new GridLayout(4,1));
		// the position of the right line controls
		posPanel.add(posLabel);
		posPanel.add(plus10);
		posPanel.add(plus1);
		posPanel.add(minus1);
		posPanel.add(minus10);
		resetRightPanel.add(resetRight);
		control.add(posPanel);
		control.add(resetRightPanel);
		// add the listeners
		plus10.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				posRight -=10;
				repaint();
			}
		});
		plus1.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				posRight -=1;
				repaint();
			}
		});
		minus1.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				posRight +=1;
				repaint();
			}
		});
		minus10.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				posRight +=10;
				repaint();
			}
		});
		resetRight.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				posRight =0;
				repaint();
			}
		});
		plus10.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				posRight -=10;
				repaint();
			}
		});
		// the angle control
		anglePanel.add(angleLabel);
		anglePanel.add(angleSlider);
		anglePanel.add(angleValLabel);
		control.add(anglePanel);
		// add the listener
		angleSlider.addChangeListener(new ChangeListener(){
			public void stateChanged(ChangeEvent e){
				angle = angleSlider.getValue();
				angleValLabel.setText(" = "+angle);
				repaint();
			}
		});
		// bar width control
		barWPanel.add(barWLabel);
		barWPanel.add(barWSlider);
		barWPanel.add(barWValLabel);
		control.add(barWPanel);
		// add the listener
		barWSlider.addChangeListener(new ChangeListener(){
			public void stateChanged(ChangeEvent e){
				barWidth = (double)barWSlider.getValue()/
							(double)barWSlider.getMaximum();
				barWValLabel.setText(" = "+
						barWSlider.getValue()+"%");
				repaint();
			}
		});
	}
	
	public void paint(Graphics g){
		Graphics2D g2d = (Graphics2D)g;
		
		// find the center
		double cX = width/2.0;
		double cY = height/2.0;
		
		//get the images
		poggendorf = new BufferedImage(width,height,
				BufferedImage.TYPE_INT_RGB);
		
		// get the images graphics handler
		Graphics2D gP = (Graphics2D)poggendorf.getGraphics();
		gP.setPaint(back);
		gP.fill(new Rectangle(0,0,width,height));
		// default stroke width
		gP.setStroke(new BasicStroke(3.0f));
		
		// convert angle to rations
		double aRad = angle*Math.PI/180.0;
		gP.setPaint(line);
		// first the standard line on the left
		double xS = 0;
		double yS = findY(cY, xS-cX,aRad);
		gP.draw(new Line2D.Double(xS,yS,cX,cY));
		// now the right hand line that can be moved
		xS = width;
		yS = findY(cY,xS-cX,aRad);
		gP.draw(new Line2D.Double(xS,yS+posRight,
				cX,cY+posRight));
		
		// now draw the bar
		gP.setPaint(bar);
		gP.fill(new Rectangle2D.Double(cX-(double)width*barWidth/2.0,
				0.0,(double)width*barWidth,height));
		// put the image onto the panel
		g2d.drawImage(poggendorf, 0,0,this);
	}
	
	// find the y position of a line
	private double findY(double cY, double dX, double aRad){
		return dX*Math.tan(aRad) + cY;
	}
	
	/* (non-Javadoc)
	 * @see image.create.CreateImage#getImage()
	 */
	@Override
	public Image getImage() {
		return poggendorf;
	}
	public String getName(){
		return NAME;
	}
	public JPanel getControlPanel(){
		return control;
	}
	public int getHeight(){ return height; }
	public int getWidht() { return width; }

}