1 /*
2 * Copyright (c) 1998, 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 javax.swing.colorchooser;
27
28 import javax.swing.*;
29 import javax.swing.border.*;
30 import javax.swing.event.*;
31 import javax.swing.text.*;
32 import java.awt.*;
33 import java.awt.image.*;
34 import java.awt.event.*;
35 import java.beans.PropertyChangeEvent;
36 import java.beans.PropertyChangeListener;
37 import java.io.Serializable;
38 import sun.swing.SwingUtilities2;
39
40
41 /**
42 * The standard preview panel for the color chooser.
43 * <p>
44 * <strong>Warning:</strong>
45 * Serialized objects of this class will not be compatible with
46 * future Swing releases. The current serialization support is
47 * appropriate for short term storage or RMI between applications running
48 * the same version of Swing. As of 1.4, support for long term storage
49 * of all JavaBeans™
50 * has been added to the <code>java.beans</code> package.
51 * Please see {@link java.beans.XMLEncoder}.
52 *
53 * @author Steve Wilson
54 * @see JColorChooser
55 */
56 @SuppressWarnings("serial") // Same-version serialization only
57 class DefaultPreviewPanel extends JPanel {
58
59 private int squareSize = 25;
60 private int squareGap = 5;
61 private int innerGap = 5;
62
63
64 private int textGap = 5;
65 private Font font = new Font(Font.DIALOG, Font.PLAIN, 12);
66 private String sampleText;
67
68 private int swatchWidth = 50;
69
70 private Color oldColor = null;
71
72 private JColorChooser getColorChooser() {
73 return (JColorChooser)SwingUtilities.getAncestorOfClass(
74 JColorChooser.class, this);
75 }
76
77 public Dimension getPreferredSize() {
78 JComponent host = getColorChooser();
79 if (host == null) {
80 host = this;
81 }
82 FontMetrics fm = host.getFontMetrics(getFont());
83
84 int ascent = fm.getAscent();
85 int height = fm.getHeight();
86 int width = SwingUtilities2.stringWidth(host, fm, getSampleText());
87
88 int y = height*3 + textGap*3;
89 int x = squareSize * 3 + squareGap*2 + swatchWidth + width + textGap*3;
90 return new Dimension( x,y );
91 }
92
93 public void paintComponent(Graphics g) {
94 if (oldColor == null)
95 oldColor = getForeground();
96
97 g.setColor(getBackground());
98 g.fillRect(0,0,getWidth(),getHeight());
99
100 if (this.getComponentOrientation().isLeftToRight()) {
101 int squareWidth = paintSquares(g, 0);
102 int textWidth = paintText(g, squareWidth);
103 paintSwatch(g, squareWidth + textWidth);
104 } else {
105 int swatchWidth = paintSwatch(g, 0);
106 int textWidth = paintText(g, swatchWidth);
107 paintSquares(g , swatchWidth + textWidth);
108
109 }
110 }
111
112 private int paintSwatch(Graphics g, int offsetX) {
113 int swatchX = offsetX;
114 g.setColor(oldColor);
115 g.fillRect(swatchX, 0, swatchWidth, (squareSize) + (squareGap/2));
116 g.setColor(getForeground());
117 g.fillRect(swatchX, (squareSize) + (squareGap/2), swatchWidth, (squareSize) + (squareGap/2) );
118 return (swatchX+swatchWidth);
119 }
120
121 private int paintText(Graphics g, int offsetX) {
122 g.setFont(getFont());
123 JComponent host = getColorChooser();
124 if (host == null) {
125 host = this;
126 }
127 FontMetrics fm = SwingUtilities2.getFontMetrics(host, g);
128
129 int ascent = fm.getAscent();
130 int height = fm.getHeight();
131 int width = SwingUtilities2.stringWidth(host, fm, getSampleText());
132
133 int textXOffset = offsetX + textGap;
134
135 Color color = getForeground();
136
137 g.setColor(color);
138
139 SwingUtilities2.drawString(host, g, getSampleText(),textXOffset+(textGap/2),
140 ascent+2);
141
142 g.fillRect(textXOffset,
143 ( height) + textGap,
144 width + (textGap),
145 height +2);
146
147 g.setColor(Color.black);
148 SwingUtilities2.drawString(host, g, getSampleText(),
149 textXOffset+(textGap/2),
150 height+ascent+textGap+2);
151
152
153 g.setColor(Color.white);
154
155 g.fillRect(textXOffset,
156 ( height + textGap) * 2,
157 width + (textGap),
158 height +2);
159
160 g.setColor(color);
161 SwingUtilities2.drawString(host, g, getSampleText(),
162 textXOffset+(textGap/2),
163 ((height+textGap) * 2)+ascent+2);
164
165 return width + textGap*3;
166
167 }
168
169 private int paintSquares(Graphics g, int offsetX) {
170
171 int squareXOffset = offsetX;
172 Color color = getForeground();
173
174 g.setColor(Color.white);
175 g.fillRect(squareXOffset,0,squareSize,squareSize);
176 g.setColor(color);
177 g.fillRect(squareXOffset+innerGap,
178 innerGap,
179 squareSize - (innerGap*2),
180 squareSize - (innerGap*2));
181 g.setColor(Color.white);
182 g.fillRect(squareXOffset+innerGap*2,
183 innerGap*2,
184 squareSize - (innerGap*4),
185 squareSize - (innerGap*4));
186
187 g.setColor(color);
188 g.fillRect(squareXOffset,squareSize+squareGap,squareSize,squareSize);
189
190 g.translate(squareSize+squareGap, 0);
191 g.setColor(Color.black);
192 g.fillRect(squareXOffset,0,squareSize,squareSize);
193 g.setColor(color);
194 g.fillRect(squareXOffset+innerGap,
195 innerGap,
196 squareSize - (innerGap*2),
197 squareSize - (innerGap*2));
198 g.setColor(Color.white);
199 g.fillRect(squareXOffset+innerGap*2,
200 innerGap*2,
201 squareSize - (innerGap*4),
202 squareSize - (innerGap*4));
203 g.translate(-(squareSize+squareGap), 0);
204
205 g.translate(squareSize+squareGap, squareSize+squareGap);
206 g.setColor(Color.white);
207 g.fillRect(squareXOffset,0,squareSize,squareSize);
208 g.setColor(color);
209 g.fillRect(squareXOffset+innerGap,
210 innerGap,
211 squareSize - (innerGap*2),
212 squareSize - (innerGap*2));
213 g.translate(-(squareSize+squareGap), -(squareSize+squareGap));
214
215
216
217 g.translate((squareSize+squareGap)*2, 0);
218 g.setColor(Color.white);
219 g.fillRect(squareXOffset,0,squareSize,squareSize);
220 g.setColor(color);
221 g.fillRect(squareXOffset+innerGap,
222 innerGap,
223 squareSize - (innerGap*2),
224 squareSize - (innerGap*2));
225 g.setColor(Color.black);
226 g.fillRect(squareXOffset+innerGap*2,
227 innerGap*2,
228 squareSize - (innerGap*4),
229 squareSize - (innerGap*4));
230 g.translate(-((squareSize+squareGap)*2), 0);
231
232 g.translate((squareSize+squareGap)*2, (squareSize+squareGap));
233 g.setColor(Color.black);
234 g.fillRect(squareXOffset,0,squareSize,squareSize);
235 g.setColor(color);
236 g.fillRect(squareXOffset+innerGap,
237 innerGap,
238 squareSize - (innerGap*2),
239 squareSize - (innerGap*2));
240 g.translate(-((squareSize+squareGap)*2), -(squareSize+squareGap));
241
242 return (squareSize*3+squareGap*2);
243
244 }
245
246 private String getSampleText() {
247 if (this.sampleText == null) {
248 this.sampleText = UIManager.getString("ColorChooser.sampleText", getLocale());
249 }
250 return this.sampleText;
251 }
252 }