1 /*
2 * Copyright 1997-2005 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25 package javax.swing.plaf.basic;
26
27 import javax.swing;
28 import javax.swing.event;
29 import javax.swing.border;
30
31 import java.awt;
32
33 import java.io.Serializable;
34
35
36 /**
37 * ComboBox renderer
38 * <p>
39 * <strong>Warning:</strong>
40 * Serialized objects of this class will not be compatible with
41 * future Swing releases. The current serialization support is
42 * appropriate for short term storage or RMI between applications running
43 * the same version of Swing. As of 1.4, support for long term storage
44 * of all JavaBeans<sup><font size="-2">TM</font></sup>
45 * has been added to the <code>java.beans</code> package.
46 * Please see {@link java.beans.XMLEncoder}.
47 *
48 * @author Arnaud Weber
49 */
50 public class BasicComboBoxRenderer extends JLabel
51 implements ListCellRenderer, Serializable {
52
53 /**
54 * An empty <code>Border</code>. This field might not be used. To change the
55 * <code>Border</code> used by this renderer directly set it using
56 * the <code>setBorder</code> method.
57 */
58 protected static Border noFocusBorder = new EmptyBorder(1, 1, 1, 1);
59 private final static Border SAFE_NO_FOCUS_BORDER = new EmptyBorder(1, 1, 1, 1);
60
61 public BasicComboBoxRenderer() {
62 super();
63 setOpaque(true);
64 setBorder(getNoFocusBorder());
65 }
66
67 private static Border getNoFocusBorder() {
68 if (System.getSecurityManager() != null) {
69 return SAFE_NO_FOCUS_BORDER;
70 } else {
71 return noFocusBorder;
72 }
73 }
74
75 public Dimension getPreferredSize() {
76 Dimension size;
77
78 if ((this.getText() == null) || (this.getText().equals( "" ))) {
79 setText( " " );
80 size = super.getPreferredSize();
81 setText( "" );
82 }
83 else {
84 size = super.getPreferredSize();
85 }
86
87 return size;
88 }
89
90 public Component getListCellRendererComponent(
91 JList list,
92 Object value,
93 int index,
94 boolean isSelected,
95 boolean cellHasFocus)
96 {
97
98 /**if (isSelected) {
99 setBackground(UIManager.getColor("ComboBox.selectionBackground"));
100 setForeground(UIManager.getColor("ComboBox.selectionForeground"));
101 } else {
102 setBackground(UIManager.getColor("ComboBox.background"));
103 setForeground(UIManager.getColor("ComboBox.foreground"));
104 }**/
105
106 if (isSelected) {
107 setBackground(list.getSelectionBackground());
108 setForeground(list.getSelectionForeground());
109 }
110 else {
111 setBackground(list.getBackground());
112 setForeground(list.getForeground());
113 }
114
115 setFont(list.getFont());
116
117 if (value instanceof Icon) {
118 setIcon((Icon)value);
119 }
120 else {
121 setText((value == null) ? "" : value.toString());
122 }
123 return this;
124 }
125
126
127 /**
128 * A subclass of BasicComboBoxRenderer that implements UIResource.
129 * BasicComboBoxRenderer doesn't implement UIResource
130 * directly so that applications can safely override the
131 * cellRenderer property with BasicListCellRenderer subclasses.
132 * <p>
133 * <strong>Warning:</strong>
134 * Serialized objects of this class will not be compatible with
135 * future Swing releases. The current serialization support is
136 * appropriate for short term storage or RMI between applications running
137 * the same version of Swing. As of 1.4, support for long term storage
138 * of all JavaBeans<sup><font size="-2">TM</font></sup>
139 * has been added to the <code>java.beans</code> package.
140 * Please see {@link java.beans.XMLEncoder}.
141 */
142 public static class UIResource extends BasicComboBoxRenderer implements javax.swing.plaf.UIResource {
143 }
144 }
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