1 /*
2 * Copyright (c) 1998, 2004, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package javax.swing.plaf.metal;
27
28 import javax.swing.*;
29 import javax.swing.event.*;
30 import javax.swing.border.*;
31 import javax.swing.plaf.*;
32 import javax.swing.plaf.basic.*;
33
34 import java.awt.*;
35 import java.beans.*;
36 import java.awt.event.*;
37
38
39 /**
40 * A Metal L&F implementation of ScrollPaneUI.
41 * <p>
42 * <strong>Warning:</strong>
43 * Serialized objects of this class will not be compatible with
44 * future Swing releases. The current serialization support is
45 * appropriate for short term storage or RMI between applications running
46 * the same version of Swing. As of 1.4, support for long term storage
47 * of all JavaBeans<sup><font size="-2">TM</font></sup>
48 * has been added to the <code>java.beans</code> package.
49 * Please see {@link java.beans.XMLEncoder}.
50 *
51 * @author Steve Wilson
52 */
53 public class MetalScrollPaneUI extends BasicScrollPaneUI
54 {
55
56 private PropertyChangeListener scrollBarSwapListener;
57
58 public static ComponentUI createUI(JComponent x) {
59 return new MetalScrollPaneUI();
60 }
61
62 public void installUI(JComponent c) {
63
64 super.installUI(c);
65
66 JScrollPane sp = (JScrollPane)c;
67 updateScrollbarsFreeStanding();
68 }
69
70 public void uninstallUI(JComponent c) {
71 super.uninstallUI(c);
72
73 JScrollPane sp = (JScrollPane)c;
74 JScrollBar hsb = sp.getHorizontalScrollBar();
75 JScrollBar vsb = sp.getVerticalScrollBar();
76 if (hsb != null) {
77 hsb.putClientProperty( MetalScrollBarUI.FREE_STANDING_PROP, null);
78 }
79 if (vsb != null) {
80 vsb.putClientProperty( MetalScrollBarUI.FREE_STANDING_PROP, null);
81 }
82 }
83
84 public void installListeners(JScrollPane scrollPane) {
85 super.installListeners(scrollPane);
86 scrollBarSwapListener = createScrollBarSwapListener();
87 scrollPane.addPropertyChangeListener(scrollBarSwapListener);
88 }
89
90 /**
91 * {@inheritDoc}
92 */
93 protected void uninstallListeners(JComponent c) {
94 super.uninstallListeners(c);
95 c.removePropertyChangeListener(scrollBarSwapListener);
96 }
97
98 /**
99 * @deprecated - Replaced by {@link #uninstallListeners(JComponent)}
100 */
101 @Deprecated
102 public void uninstallListeners(JScrollPane scrollPane) {
103 super.uninstallListeners(scrollPane);
104 scrollPane.removePropertyChangeListener(scrollBarSwapListener);
105 }
106
107 /**
108 * If the border of the scrollpane is an instance of
109 * <code>MetalBorders.ScrollPaneBorder</code>, the client property
110 * <code>FREE_STANDING_PROP</code> of the scrollbars
111 * is set to false, otherwise it is set to true.
112 */
113 private void updateScrollbarsFreeStanding() {
114 if (scrollpane == null) {
115 return;
116 }
117 Border border = scrollpane.getBorder();
118 Object value;
119
120 if (border instanceof MetalBorders.ScrollPaneBorder) {
121 value = Boolean.FALSE;
122 }
123 else {
124 value = Boolean.TRUE;
125 }
126 JScrollBar sb = scrollpane.getHorizontalScrollBar();
127 if (sb != null) {
128 sb.putClientProperty
129 (MetalScrollBarUI.FREE_STANDING_PROP, value);
130 }
131 sb = scrollpane.getVerticalScrollBar();
132 if (sb != null) {
133 sb.putClientProperty
134 (MetalScrollBarUI.FREE_STANDING_PROP, value);
135 }
136 }
137
138 protected PropertyChangeListener createScrollBarSwapListener() {
139 return new PropertyChangeListener() {
140 public void propertyChange(PropertyChangeEvent e) {
141 String propertyName = e.getPropertyName();
142 if (propertyName.equals("verticalScrollBar") ||
143 propertyName.equals("horizontalScrollBar")) {
144 JScrollBar oldSB = (JScrollBar)e.getOldValue();
145 if (oldSB != null) {
146 oldSB.putClientProperty(
147 MetalScrollBarUI.FREE_STANDING_PROP, null);
148 }
149 JScrollBar newSB = (JScrollBar)e.getNewValue();
150 if (newSB != null) {
151 newSB.putClientProperty(
152 MetalScrollBarUI.FREE_STANDING_PROP,
153 Boolean.FALSE);
154 }
155 }
156 else if ("border".equals(propertyName)) {
157 updateScrollbarsFreeStanding();
158 }
159 }};
160 }
161
162 }