SortArrowIcon.java

/*
 *  -------------------------------------------------------------------------
 *  Copyright 2014 
 *  Centre for Information Modeling - Austrian Centre for Digital Humanities
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License
 *  -------------------------------------------------------------------------
 */

package org.emile.cirilo.gui.jtable;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import javax.swing.Icon;


public class SortArrowIcon
        implements Icon {

    public static final int NONE = 0;

    public static final int DECENDING = 1;

    public static final int ASCENDING = 2;

    protected int direction;

    protected int width = 8;

    protected int height = 8;

    public SortArrowIcon(int direction) {
        this.direction = direction;
    }

    public int getIconWidth() {
        return width;
    }

    public int getIconHeight() {
        return height;
    }

    public void paintIcon(Component c, Graphics g, int x, int y) {
        Color bg = c.getBackground();
        Color light = bg.brighter();
        Color shade = bg.darker();

        int w = width;
        int h = height;
        int m = w / 2;
        if (direction == ASCENDING) {
            g.setColor(shade);
            g.drawLine(x, y, x + w, y);
            g.drawLine(x, y, x + m, y + h);
            g.setColor(light);
            g.drawLine(x + w, y, x + m, y + h);
        }
        if (direction == DECENDING) {
            g.setColor(shade);
            g.drawLine(x + m, y, x, y + h);
            g.setColor(light);
            g.drawLine(x, y + h, x + w, y + h);
            g.drawLine(x + m, y, x + w, y + h);
        }
    }
}