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 package org.apache.log4j.chainsaw;
18
19 import java.awt.Component;
20
21 import javax.swing.BorderFactory;
22 import javax.swing.JCheckBox;
23 import javax.swing.JList;
24 import javax.swing.ListCellRenderer;
25 import javax.swing.UIManager;
26 import javax.swing.border.Border;
27 import javax.swing.table.TableColumn;
28
29
30 /**
31 * A ListCellRenderer that display a check box if the value
32 * has been "checked".
33 *
34 * Borrowed heavily from the excellent book "Swing, 2nd Edition" by
35 * Matthew Robinson & Pavel Vorobiev.
36 *
37 * @author Paul Smith
38 *
39 */
40 public abstract class CheckListCellRenderer extends JCheckBox
41 implements ListCellRenderer {
42 private final Border noFocusBorder =
43 BorderFactory.createEmptyBorder(1, 1, 1, 1);
44
45 /**
46 *
47 */
48 public CheckListCellRenderer() {
49 super();
50 setOpaque(true);
51 setBorder(noFocusBorder);
52 }
53
54 /* (non-Javadoc)
55 * @see javax.swing.ListCellRenderer#getListCellRendererComponent(javax.swing.JList, java.lang.Object, int, boolean, boolean)
56 */
57 public Component getListCellRendererComponent(
58 JList list, Object value, int index, boolean isSelected,
59 boolean cellHasFocus) {
60 setText(((TableColumn)value).getHeaderValue().toString());
61 setBackground(
62 isSelected ? list.getSelectionBackground() : list.getBackground());
63 setForeground(
64 isSelected ? list.getSelectionForeground() : list.getForeground());
65 setFont(list.getFont());
66 setBorder(
67 cellHasFocus ? UIManager.getBorder("List.focusCellHighlightBorder")
68 : noFocusBorder);
69
70 setSelected(isSelected(value));
71 return this;
72 }
73
74 /**
75 * @param value
76 * @return selected flag
77 */
78 protected abstract boolean isSelected(Object value);
79 }