package causation.lab.plaf.basic;

// packages
import javax.swing.*;
import javax.swing.plaf.*;
import java.awt.*;
import java.awt.geom.Ellipse2D;

// custom classes
import causation.lab.plaf.LatentUI;
import causation.lab.Latent;

/**
 * <p>
 * The basic L&F for Latents.
 * Copyright 1999 by David Danks. All rights reserved.
 * </p>
 *
 * @see		Latent
 * @version	0.9	June 23, 1999
 * @author	David Danks
 */

public class BasicLatentUI extends LatentUI {

/////////////////// Class Variables ///////////////////
	private static final Color BACKGROUND = new Color(153, 204, 153);
	private static final Color HIGHLIGHT_BACKGROUND = 
		new Color(255, 204, 102);
	private static final Color BORDER = new Color(102, 102, 102, 102);
	private static final Color TEXT = Color.black;
	private static final float BORDER_WIDTH = 3;

/////////////////// Constructor ///////////////////
/**
 * The basic constructor
 */
	public BasicLatentUI() { ; }

/////////////////// Class Methods ///////////////////
/**
 * @return	The BasicRandomizerUI for this object
 */
	public static ComponentUI createUI(JComponent c) {
		return new BasicLatentUI();
	}

/////////////////// Instance Methods ///////////////////
/**
 * Currently does not do anything
 */
	public void installUI(JComponent c) { ; }

/**
 * Currently does not do anything
 */
	public void uninstallUI(JComponent c) { ; }

/**
 * Paints the Latent into the given Graphics context.  Note: If we aren't
 * using Java 2, nothing will paint, since it tries to use Graphics2D.
 * @param	g	The Graphics context for the Latent
 * @param	c	The Latent to be drawn
 */
	public void paint(Graphics g, JComponent c) {
		if (!(g instanceof Graphics2D)) return;
		if (!(c instanceof Latent)) return;
		Graphics2D g2 = (Graphics2D)g;
		Latent l = (Latent)c;
		Ellipse2D e = l.getEllipse();
		
		// draw the ellipse, and its border
		if (l.isHighlight()) g2.setColor(HIGHLIGHT_BACKGROUND);
		else g2.setColor(BACKGROUND);
		g2.fill(e);
		g2.setColor(BORDER);
		g2.setStroke(new BasicStroke(BORDER_WIDTH));
		g2.draw(e);
		g2.setStroke(new BasicStroke());
		
		// now, draw the name
		Point origin = l.getTextOrigin();
		String name = l.getName();
		g2.setFont(l.getFont());
		g2.setColor(TEXT);
		g2.drawString(name, origin.x, origin.y);
	}
}