ArrowIcon.java

/***
 * Copyright (c) 2008, Endless Loop Software, Inc.
 * 
 * This file is part of EgoNet.
 * 
 * EgoNet is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 * 
 * EgoNet 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.egonet.util;

import java.awt.*;
import javax.swing.*;

public class ArrowIcon implements Icon, SwingConstants
{
	private int width = 9;
	private int height = 18;

	private int[] xPoints = new int[4];
	private int[] yPoints = new int[4];

	public ArrowIcon(int direction)
	{
		if (direction == SwingConstants.LEFT)
		{
			xPoints[0] = width;
			yPoints[0] = -1;
			xPoints[1] = width;
			yPoints[1] = height;
			xPoints[2] = 0;
			yPoints[2] = height / 2;
			xPoints[3] = 0;
			yPoints[3] = height / 2 - 1;
		}
		else /* direction == TRAILING */ {
			xPoints[0] = 0;
			yPoints[0] = -1;
			xPoints[1] = 0;
			yPoints[1] = height;
			xPoints[2] = width;
			yPoints[2] = height / 2;
			xPoints[3] = width;
			yPoints[3] = height / 2 - 1;
		}
	}

	public int getIconHeight()
	{
		return height;
	}

	public int getIconWidth()
	{
		return width;
	}

	public void paintIcon(Component c, Graphics g, int x, int y)
	{
		int length = xPoints.length;
		int adjustedXPoints[] = new int[length];
		int adjustedYPoints[] = new int[length];

		for (int i = 0; i < length; i++)
		{
			adjustedXPoints[i] = xPoints[i] + x;
			adjustedYPoints[i] = yPoints[i] + y;
		}

		if (c.isEnabled())
		{
			g.setColor(c.getForeground());
		}
		else
		{
			g.setColor(Color.gray);
		}

		g.fillPolygon(adjustedXPoints, adjustedYPoints, length);
	}
}