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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    * 
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.log4j.chainsaw;
19  
20  import java.awt.*;
21  
22  import javax.swing.*;
23  
24  
25  /**
26   * An Icon that is a Nice arrow to be used for displaying which
27   * Column is being used for sorting.
28   * @author Claude Duguay
29  */
30  public class SortArrowIcon implements Icon {
31    public static final int NONE = 0;
32    public static final int DECENDING = 1;
33    public static final int ASCENDING = 2;
34    protected int direction;
35    protected int width = 8;
36    protected int height = 8;
37  
38    public SortArrowIcon(int direction) {
39      this.direction = direction;
40    }
41  
42    public int getIconWidth() {
43      return width;
44    }
45  
46    public int getIconHeight() {
47      return height;
48    }
49  
50    public void paintIcon(Component c, Graphics g, int x, int y) {
51      Color bg = c.getBackground();
52      Color light = bg.brighter();
53      Color shade = bg.darker();
54  
55      int w = width;
56      int h = height;
57      int m = w / 2;
58  
59      if (direction == ASCENDING) {
60        g.setColor(shade);
61        g.drawLine(x, y, x + w, y);
62        g.drawLine(x, y, x + m, y + h);
63        g.setColor(light);
64        g.drawLine(x + w, y, x + m, y + h);
65      }
66  
67      if (direction == DECENDING) {
68        g.setColor(shade);
69        g.drawLine(x + m, y, x, y + h);
70        g.setColor(light);
71        g.drawLine(x, y + h, x + w, y + h);
72        g.drawLine(x + m, y, x + w, y + h);
73      }
74    }
75  }