/**
 * 
 */
package image.create;

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

import gui.elements.RGBControl;
import image.create.CreateImage;

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

	// name of illusion
	private final static String NAME = "Square Wave Grating";

	// the basic sinewave grating parameters
	private double rBal = 1.0;
	private double gBal = 1.0;
	private double bBal = 1.0;
	DecimalFormat balFmt = new DecimalFormat("0.00");
	
	private double angle = 0;  // angle in radians
	private double cycleWidth = 25;  // proportion of whole
	private double contrast = 1.0;

	
	// the image to be returned
	private Image grating;
	
	// image manipulation objects
	// angle
	private JPanel anglePanel = new JPanel();
	private JLabel angleLabel = new JLabel("Angle");
	private JSlider angleSlider = new JSlider(0,180,(int)angle);
	private JLabel angleValLabel = new JLabel(" = "+angle);
	// Size of sine wave cycle
	private JPanel cycleWPanel = new JPanel();
	private JLabel cycleWLabel =  new JLabel("Cycle Width");
	private JSlider cycleWSlider = new JSlider(3,2*width,
			(int)(cycleWidth));
	DecimalFormat cFMT = new DecimalFormat("000");
	private JLabel cycleWValLabel = new JLabel(" = "+
			cFMT.format(cycleWSlider.getValue())+"pixels"+
			" ("+(balFmt.format(
					(double)cycleWidth/(double)width))+
			"% of image)");
	// contrast of sinewave
	private JPanel contrastPanel = new JPanel();
	private JLabel contrastLabel = new JLabel("Contrast");
	private JSlider contrastSlider = new JSlider(0,200,200);
	private JLabel contrastValLabel = new JLabel(" = 1.00");
	// Color balance
	private RGBControl bal = new RGBControl();
	private JLabel balLabel = new JLabel("Color");
	
	// the control panel to be returned
	private JPanel control = new JPanel();
	
	// empty constructor
	public SquareGrat(){
		setSize(width,height);
		setupControl();
	}
	
	private void setupControl(){
		control.setLayout(new BorderLayout());
		JPanel top = new JPanel(new GridLayout(4,1));
		// cycle width control
		cycleWPanel.add(cycleWLabel);
		cycleWPanel.add(cycleWSlider);
		top.add(cycleWPanel);
		top.add(cycleWValLabel);
		// add the listener
		cycleWSlider.addChangeListener(new ChangeListener(){
			public void stateChanged(ChangeEvent e){
				cycleWidth = (double)cycleWSlider.getValue();
				cycleWValLabel.setText(" = "+
						cycleWSlider.getValue()+"pixels"+
						" ("+(balFmt.format(
								(double)cycleWidth/(double)width))+
						"% of image)");
				repaint();
			}
		});
		// the angle control
		anglePanel.add(angleLabel);
		anglePanel.add(angleSlider);
		anglePanel.add(angleValLabel);
		top.add(anglePanel);
		// add the listener
		angleSlider.addChangeListener(new ChangeListener(){
			public void stateChanged(ChangeEvent e){
				angle = (double)angleSlider.getValue()
				              *Math.PI/180.0;
				angleValLabel.setText(" = "+angleSlider.getValue());
				repaint();
			}
		});
		// the contrast control
		contrastPanel.add(contrastLabel);
		contrastPanel.add(contrastSlider);
		contrastPanel.add(contrastValLabel);
		top.add(contrastPanel);
		// add the listener
		contrastSlider.addChangeListener(new ChangeListener(){
			public void stateChanged(ChangeEvent e){
				contrast = (double)contrastSlider.getValue()/
				            (double)contrastSlider.getMaximum();
				contrastValLabel.setText(" = "+
						balFmt.format(contrast));
				repaint();
			}
		});
		control.add(top,BorderLayout.NORTH);
		bal.setShowLabels(true);
		JPanel balPanel = new JPanel();
		balPanel.add(balLabel);
		balPanel.add(bal);
		control.add(balPanel,BorderLayout.CENTER);
		// add the listeners
		bal.red.addChangeListener(new ChangeListener(){
			public void stateChanged(ChangeEvent e){
				rBal = bal.getRedDbl();
				repaint();
			}
		});
		bal.green.addChangeListener(new ChangeListener(){
			public void stateChanged(ChangeEvent e){
				gBal = bal.getGreenDbl();
				repaint();
			}
		});
		bal.blue.addChangeListener(new ChangeListener(){
			public void stateChanged(ChangeEvent e){
				bBal = bal.getBlueDbl();
				repaint();
			}
		});
	}
	
	public void paint(Graphics g){
		Graphics2D g2d = (Graphics2D)g;
		
		//get the images
		grating = new BufferedImage(width,height,
				BufferedImage.TYPE_INT_RGB);
		
		// get the images graphics handler
		Graphics2D gP = (Graphics2D)grating.getGraphics();
		gP.setPaint(Color.BLACK);
		gP.fill(new Rectangle(0,0,width,height));
		
		// the bright bar luminance
		float br = 0.5f+0.5f*(float)contrast;
		Color brColor = new Color((float)(rBal*br),
				(float)(gBal*br),(float)(bBal*br));
		// the dark bar luminance 
		float dk = 0.5f-0.5f*(float)contrast;
		Color dkColor = new Color((float)(rBal*dk),
				(float)(gBal*dk),(float)(bBal*dk));
        // rotate the image
        gP.rotate(angle,width/2,height/2);
        for (int i = -width/2; i <= width*3/2; i+= cycleWidth){
        	// bright bar
        	gP.setColor(brColor);
        	gP.fill(new Rectangle2D.Double(i,-height/2,
        			cycleWidth/2.0,
        			2.0*height));
        	// dark bar
        	gP.setColor(dkColor);
        	gP.fill(new Rectangle2D.Double(i+cycleWidth/2.0,
        			-height/2,
        			cycleWidth/2.0,
        			2.0*height));
      } // end the for block for drawing the sine wave grating
		// put the image onto the panel
		g2d.drawImage(grating, 0,0,this);
	}
	
	/* (non-Javadoc)
	 * @see image.create.CreateImage#getImage()
	 */
	@Override
	public Image getImage() {
		return grating;
	}
	public String getName(){
		return NAME;
	}
	public JPanel getControlPanel(){
		return control;
	}
	public int getHeight(){ return height; }
	public int getWidht() { return width; }

}