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1   /*
2    * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.
8    *
9    * This code is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12   * version 2 for more details (a copy is included in the LICENSE file that
13   * accompanied this code).
14   *
15   * You should have received a copy of the GNU General Public License version
16   * 2 along with this work; if not, write to the Free Software Foundation,
17   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18   *
19   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20   * or visit www.oracle.com if you need additional information or have any
21   * questions.
22   *
23   */
24  
25  package sun.jvm.hotspot.ui.table;
26  
27  import java.awt.Component;
28  
29  import javax.swing.*;
30  import javax.swing.table.*;
31  
32  /**
33   * A cell renderer for the JTableHeader which understands the sorted
34   * column state and renders arrow buttons to indicated the sorted column
35   * and order
36   */
37  public class SortHeaderCellRenderer extends DefaultTableCellRenderer {
38  
39      private Icon descendingIcon;
40      private Icon ascendingIcon;
41  
42      private SortableTableModel model;
43  
44      public SortHeaderCellRenderer(JTableHeader header, SortableTableModel model) {
45          this.model = model;
46  
47          descendingIcon = getIcon("navigation/Down16.gif");
48          ascendingIcon = getIcon("navigation/Up16.gif");
49  
50          setForeground(header.getForeground());
51          setBackground(header.getBackground());
52          setFont(header.getFont());
53  
54          setBorder(UIManager.getBorder("TableHeader.cellBorder"));
55          setHorizontalAlignment(JLabel.CENTER);
56  
57      }
58  
59      /**
60       *  Retrieves an Image Icon from the JLF graphics repository.
61       */
62      public ImageIcon getIcon(String name) {
63          String imagePath = "/toolbarButtonGraphics/" + name;
64          java.net.URL url = this.getClass().getResource(imagePath);
65          if (url != null) {
66              return new ImageIcon(url);
67          }
68          return null;
69      }
70  
71      public Component getTableCellRendererComponent(JTable table, Object value,
72                                                     boolean isSelected, boolean hasFocus,
73                                                     int row, int column)  {
74          setText((value == null) ? "" : value.toString());
75  
76          Icon icon = null;
77          if (column == model.getColumn()) {
78              if (model.isAscending()) {
79                  icon = ascendingIcon;
80              } else {
81                  icon = descendingIcon;
82              }
83          }
84          setIcon(icon);
85  
86          return this;
87      }
88  }