1 /*
2 * Copyright (c) 2005, 2006, 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 package javax.swing.plaf.nimbus;
26
27 import javax.swing.UIManager;
28 import java.awt.Color;
29 import java.beans.PropertyChangeSupport;
30 import java.beans.PropertyChangeListener;
31
32 /**
33 * DerivedColor - A color implementation that is derived from a UIManager
34 * defaults table color and a set of offsets. It can be rederived at any point
35 * by calling rederiveColor(). For example when its parent color changes and it
36 * value will update to reflect the new derived color. Property change events
37 * are fired for the "rgb" property when the derived color changes.
38 *
39 * @author Jasper Potts
40 */
41 class DerivedColor extends Color {
42 private final String uiDefaultParentName;
43 private final float hOffset, sOffset, bOffset;
44 private final int aOffset;
45 private int argbValue;
46
47 DerivedColor(String uiDefaultParentName, float hOffset, float sOffset, float bOffset, int aOffset) {
48 super(0);
49 this.uiDefaultParentName = uiDefaultParentName;
50 this.hOffset = hOffset;
51 this.sOffset = sOffset;
52 this.bOffset = bOffset;
53 this.aOffset = aOffset;
54 }
55
56 public String getUiDefaultParentName() {
57 return uiDefaultParentName;
58 }
59
60 public float getHueOffset() {
61 return hOffset;
62 }
63
64 public float getSaturationOffset() {
65 return sOffset;
66 }
67
68 public float getBrightnessOffset() {
69 return bOffset;
70 }
71
72 public int getAlphaOffset() {
73 return aOffset;
74 }
75
76 /**
77 * Recalculate the derived color from the UIManager parent color and offsets
78 */
79 public void rederiveColor() {
80 Color src = UIManager.getColor(uiDefaultParentName);
81 if (src != null) {
82 float[] tmp = Color.RGBtoHSB(src.getRed(), src.getGreen(), src.getBlue(), null);
83 // apply offsets
84 tmp[0] = clamp(tmp[0] + hOffset);
85 tmp[1] = clamp(tmp[1] + sOffset);
86 tmp[2] = clamp(tmp[2] + bOffset);
87 int alpha = clamp(src.getAlpha() + aOffset);
88 argbValue = (Color.HSBtoRGB(tmp[0], tmp[1], tmp[2]) & 0xFFFFFF) | (alpha << 24);
89 } else {
90 float[] tmp = new float[3];
91 tmp[0] = clamp(hOffset);
92 tmp[1] = clamp(sOffset);
93 tmp[2] = clamp(bOffset);
94 int alpha = clamp(aOffset);
95 argbValue = (Color.HSBtoRGB(tmp[0], tmp[1], tmp[2]) & 0xFFFFFF) | (alpha << 24);
96 }
97 }
98
99 /**
100 * Returns the RGB value representing the color in the default sRGB {@link java.awt.image.ColorModel}. (Bits 24-31
101 * are alpha, 16-23 are red, 8-15 are green, 0-7 are blue).
102 *
103 * @return the RGB value of the color in the default sRGB <code>ColorModel</code>.
104 * @see java.awt.image.ColorModel#getRGBdefault
105 * @see #getRed
106 * @see #getGreen
107 * @see #getBlue
108 * @since JDK1.0
109 */
110 @Override public int getRGB() {
111 return argbValue;
112 }
113
114 @Override
115 public boolean equals(Object o) {
116 if (this == o) return true;
117 if (!(o instanceof DerivedColor)) return false;
118 DerivedColor that = (DerivedColor) o;
119 if (aOffset != that.aOffset) return false;
120 if (Float.compare(that.bOffset, bOffset) != 0) return false;
121 if (Float.compare(that.hOffset, hOffset) != 0) return false;
122 if (Float.compare(that.sOffset, sOffset) != 0) return false;
123 if (!uiDefaultParentName.equals(that.uiDefaultParentName)) return false;
124 return true;
125 }
126
127 @Override
128 public int hashCode() {
129 int result = uiDefaultParentName.hashCode();
130 result = 31 * result + hOffset != +0.0f ?
131 Float.floatToIntBits(hOffset) : 0;
132 result = 31 * result + sOffset != +0.0f ?
133 Float.floatToIntBits(sOffset) : 0;
134 result = 31 * result + bOffset != +0.0f ?
135 Float.floatToIntBits(bOffset) : 0;
136 result = 31 * result + aOffset;
137 return result;
138 }
139
140 private float clamp(float value) {
141 if (value < 0) {
142 value = 0;
143 } else if (value > 1) {
144 value = 1;
145 }
146 return value;
147 }
148
149 private int clamp(int value) {
150 if (value < 0) {
151 value = 0;
152 } else if (value > 255) {
153 value = 255;
154 }
155 return value;
156 }
157
158 /**
159 * Returns a string representation of this <code>Color</code>. This method
160 * is intended to be used only for debugging purposes. The content and
161 * format of the returned string might vary between implementations. The
162 * returned string might be empty but cannot be <code>null</code>.
163 *
164 * @return a String representation of this <code>Color</code>.
165 */
166 @Override
167 public String toString() {
168 Color src = UIManager.getColor(uiDefaultParentName);
169 String s = "DerivedColor(color=" + getRed() + "," + getGreen() + "," + getBlue() +
170 " parent=" + uiDefaultParentName +
171 " offsets=" + getHueOffset() + "," + getSaturationOffset() + ","
172 + getBrightnessOffset() + "," + getAlphaOffset();
173 return src == null ? s : s + " pColor=" + src.getRed() + "," + src.getGreen() + "," + src.getBlue();
174 }
175
176 static class UIResource extends DerivedColor implements javax.swing.plaf.UIResource {
177 UIResource(String uiDefaultParentName, float hOffset, float sOffset,
178 float bOffset, int aOffset) {
179 super(uiDefaultParentName, hOffset, sOffset, bOffset, aOffset);
180 }
181
182 @Override
183 public boolean equals(Object o) {
184 return (o instanceof UIResource) && super.equals(o);
185 }
186
187 @Override
188 public int hashCode() {
189 return super.hashCode() + 7;
190 }
191 }
192 }