/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.processeditor.results;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.geom.GeneralPath;

import javax.swing.border.Border;

/**
 * 
 * @author Simon Fischer
 */
public class RapidBorder implements Border {

	private static final Insets INSETS = new Insets(20, 5, 5, 5);
	private final Color color;
	private final int cornerSize;
	private final int headerHeight;
	
	protected RapidBorder(Color color, int cornerSize, int headerHeight) {
		super();
		this.color = color;
		this.cornerSize = cornerSize;
		this.headerHeight = headerHeight;
	}

	@Override
	public Insets getBorderInsets(Component c) {
		return INSETS;
	}

	@Override
	public boolean isBorderOpaque() {
		return true;
	}

	@Override
	public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
		
		width--;
		height--;
		
		GeneralPath border = new GeneralPath();
		border.moveTo(x+cornerSize, y); // top left
		border.lineTo(x+width-cornerSize, y);
		border.curveTo(x+width, y, y+width, y, x+width, y+cornerSize); // top right
		border.lineTo(x+width, y+height-cornerSize);
		border.curveTo(x+width, y+height, x+width, y+height, x+width-cornerSize, y+height); // bottom right
		border.lineTo(x+cornerSize, y+height);
		border.curveTo(x, y+height, x, y+height, x, y+height-cornerSize); // bottom left
		border.lineTo(x, y+cornerSize);
		border.curveTo(x, y, x, y, x+cornerSize, y); // top left again

		
		
		if (headerHeight > 0) {
			if (height <= headerHeight + cornerSize) {
				g.setColor(color);
				((Graphics2D)g).fill(border);
			} else {
				g.setColor(c.getBackground());
				((Graphics2D)g).fill(border);				
				
				GeneralPath header = new GeneralPath();
				header.moveTo(x+cornerSize, y); // top left
				header.lineTo(x+width-cornerSize, y);
				header.curveTo(x+width, y, y+width, y, x+width, y+cornerSize); // top right
				header.lineTo(x+width, y+headerHeight);
				header.lineTo(x, y+headerHeight);
				header.lineTo(x, y+cornerSize);
				header.curveTo(x, y, x, y, x+cornerSize, y); // top left again
				g.setColor(color);
				((Graphics2D)g).fill(header);				
			}
		}
		
		g.setColor(color);
		((Graphics2D)g).draw(border);
	}
}