1 /*
2 * Copyright (c) 1997, 2014, 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 com.sun.java.swing.plaf.motif;
27
28 import javax.swing.*;
29 import javax.swing.border.*;
30 import javax.swing.plaf.*;
31 import javax.swing.plaf.basic.BasicScrollPaneUI;
32
33 import java.beans.PropertyChangeEvent;
34 import java.beans.PropertyChangeListener;
35
36 /**
37 * A CDE/Motif {@code L&F} implementation of ScrollPaneUI.
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 appropriate
42 * for short term storage or RMI between applications running the same
43 * version of Swing. A future release of Swing will provide support for
44 * long term persistence.
45 *
46 * @author Hans Muller
47 */
48 public class MotifScrollPaneUI extends BasicScrollPaneUI
49 {
50 private final static Border vsbMarginBorderR = new EmptyBorder(0, 4, 0, 0);
51 private final static Border vsbMarginBorderL = new EmptyBorder(0, 0, 0, 4);
52 private final static Border hsbMarginBorder = new EmptyBorder(4, 0, 0, 0);
53
54 private CompoundBorder vsbBorder;
55 private CompoundBorder hsbBorder;
56
57 private PropertyChangeListener propertyChangeHandler;
58
59 @Override
60 protected void installListeners(JScrollPane scrollPane) {
61 super.installListeners(scrollPane);
62 propertyChangeHandler = createPropertyChangeHandler();
63 scrollPane.addPropertyChangeListener(propertyChangeHandler);
64 }
65
66 @Override
67 protected void uninstallListeners(JComponent scrollPane) {
68 super.uninstallListeners(scrollPane);
69 scrollPane.removePropertyChangeListener(propertyChangeHandler);
70 }
71
72 private PropertyChangeListener createPropertyChangeHandler() {
73 return new PropertyChangeListener() {
74 @Override
75 public void propertyChange(PropertyChangeEvent e) {
76 String propertyName = e.getPropertyName();
77
78 if (propertyName.equals("componentOrientation")) {
79 JScrollPane pane = (JScrollPane)e.getSource();
80 JScrollBar vsb = pane.getVerticalScrollBar();
81 if (vsb != null && vsbBorder != null &&
82 vsb.getBorder() == vsbBorder) {
83 // The Border on the verticall scrollbar matches
84 // what we installed, reset it.
85 if (MotifGraphicsUtils.isLeftToRight(pane)) {
86 vsbBorder = new CompoundBorder(vsbMarginBorderR,
87 vsbBorder.getInsideBorder());
88 } else {
89 vsbBorder = new CompoundBorder(vsbMarginBorderL,
90 vsbBorder.getInsideBorder());
91 }
92 vsb.setBorder(vsbBorder);
93 }
94 }
95 }};
96 }
97
98 @Override
99 protected void installDefaults(JScrollPane scrollpane) {
100 super.installDefaults(scrollpane);
101
102 JScrollBar vsb = scrollpane.getVerticalScrollBar();
103 if (vsb != null) {
104 if (MotifGraphicsUtils.isLeftToRight(scrollpane)) {
105 vsbBorder = new CompoundBorder(vsbMarginBorderR,
106 vsb.getBorder());
107 }
108 else {
109 vsbBorder = new CompoundBorder(vsbMarginBorderL,
110 vsb.getBorder());
111 }
112 vsb.setBorder(vsbBorder);
113 }
114
115 JScrollBar hsb = scrollpane.getHorizontalScrollBar();
116 if (hsb != null) {
117 hsbBorder = new CompoundBorder(hsbMarginBorder, hsb.getBorder());
118 hsb.setBorder(hsbBorder);
119 }
120 }
121
122 @Override
123 protected void uninstallDefaults(JScrollPane c) {
124 super.uninstallDefaults(c);
125
126 JScrollBar vsb = scrollpane.getVerticalScrollBar();
127 if (vsb != null) {
128 if (vsb.getBorder() == vsbBorder) {
129 vsb.setBorder(null);
130 }
131 vsbBorder = null;
132 }
133
134 JScrollBar hsb = scrollpane.getHorizontalScrollBar();
135 if (hsb != null) {
136 if (hsb.getBorder() == hsbBorder) {
137 hsb.setBorder(null);
138 }
139 hsbBorder = null;
140 }
141 }
142
143
144 public static ComponentUI createUI(JComponent x) {
145 return new MotifScrollPaneUI();
146 }
147 }