1 /*
2 * Copyright (c) 2004, 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 sun.swing;
27
28 import java.awt.Color;
29 import javax.swing.plaf.ColorUIResource;
30
31 /**
32 * A subclass of ColorUIResource that wraps an alternate color
33 * for use during printing. Useful to replace color values that
34 * may look poor in printed output.
35 *
36 * @author Shannon Hickey
37 *
38 */
39 @SuppressWarnings("serial") // JDK-implementation class
40 public class PrintColorUIResource extends ColorUIResource {
41
42 /** The color to use during printing */
43 private Color printColor;
44
45 /**
46 * Construct an instance for the given RGB value and
47 * alternate color to use during printing.
48 *
49 * @param rgb the color rgb value
50 * @param printColor the alternate color for printing
51 */
52 public PrintColorUIResource(int rgb, Color printColor) {
53 super(rgb);
54 this.printColor = printColor;
55 }
56
57 /**
58 * Return the color to use during printing. If no alternate
59 * color was specified on construction, this method will
60 * return <code>this</code>.
61 *
62 * @return the color to use during printing
63 */
64 public Color getPrintColor() {
65 return ((printColor != null) ? printColor : this);
66 }
67
68 /**
69 * Replaces this object with a plain {@code ColorUIResource} during
70 * serialization. Since {@code PrintColorUIResource} resides in the
71 * sun.swing package, access can be disallowed to it by a security
72 * manager. When access is disallowed, deserialization of any object
73 * with reference to a {@code PrintColorUIResource} fails.
74 * <p>
75 * Since {@code PrintColorUIResource} is used only by Swing's look
76 * and feels, and we know that UI supplied colors are replaced after
77 * deserialization when the UI is re-installed, the only important
78 * aspect of the {@code PrintColorUIResource} that needs to be
79 * persisted is the fact that it is a {@code ColorUIResource}. As
80 * such, we can avoid the problem outlined above by replacing
81 * the problematic {@code PrintColorUIResource} with a plain
82 * {@code ColorUIResource}.
83 * <p>
84 * Note: As a result of this method, it is not possible to write
85 * a {@code PrintColorUIResource} to a stream and then read
86 * back a {@code PrintColorUIResource}. This is acceptable since we
87 * don't have a requirement for that in Swing.
88 */
89 private Object writeReplace() {
90 return new ColorUIResource(this);
91 }
92 }
--- EOF ---