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Java > Open Source Codes > org > jfree > demo > DrawStringPanel


1 /* ========================================================================
2  * JCommon : a free general purpose class library for the Java(tm) platform
3  * ========================================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jcommon/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * --------------------
28  * DrawStringPanel.java
29  * --------------------
30  * (C) Copyright 2003, 2004, by Object Refinery Limited.
31  *
32  * Original Author: David Gilbert (for Object Refinery Limited);
33  * Contributor(s): -;
34  *
35  * $Id: DrawStringPanel.java,v 1.5 2005/10/18 13:15:41 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 10-Jun-2003 : Version 1;
40  * 30-Sep-2004 : Moved drawRotatedString() from RefineryUtilities --> TextUtilities (DG);
41  *
42  */
43 package org.jfree.demo;
44
45 import java.awt.Color JavaDoc;
46 import java.awt.Dimension JavaDoc;
47 import java.awt.Font JavaDoc;
48 import java.awt.Graphics JavaDoc;
49 import java.awt.Graphics2D JavaDoc;
50 import java.awt.Insets JavaDoc;
51 import java.awt.geom.Line2D JavaDoc;
52 import java.awt.geom.Rectangle2D JavaDoc;
53
54 import javax.swing.JPanel JavaDoc;
55
56 import org.jfree.text.TextUtilities;
57 import org.jfree.ui.TextAnchor;
58
59 /**
60  * A panel used by the {@link DrawStringDemo} class.
61  *
62  * @author David Gilbert
63  */
64 public class DrawStringPanel extends JPanel JavaDoc {
65
66     /** The preferred size for the panel. */
67     private static final Dimension JavaDoc PREFERRED_SIZE = new Dimension JavaDoc(500, 300);
68
69     /** Is the text rotated. */
70     private boolean rotate;
71
72     /** The text to display. */
73     private String JavaDoc text = "Hello World";
74
75     /** The text anchor. */
76     private TextAnchor anchor = TextAnchor.TOP_LEFT;
77
78     /** The rotation anchor. */
79     private TextAnchor rotationAnchor = TextAnchor.TOP_LEFT;
80
81     /** The font. */
82     private Font JavaDoc font = new Font JavaDoc("Serif", Font.PLAIN, 12);
83
84     /** The rotation angle. */
85     private double angle;
86
87     /**
88      * Creates a new panel.
89      *
90      * @param text the text.
91      * @param rotate a flag that controls whether or not the text is rotated.
92      */
93     public DrawStringPanel(final String JavaDoc text, final boolean rotate) {
94         this.text = text;
95         this.rotate = rotate;
96     }
97
98     /**
99      * Returns the preferred size for the panel.
100      *
101      * @return The preferred size.
102      */
103     public Dimension JavaDoc getPreferredSize() {
104         return PREFERRED_SIZE;
105     }
106
107     /**
108      * Sets the text anchor.
109      *
110      * @param anchor the text anchor.
111      */
112     public void setAnchor(final TextAnchor anchor) {
113         this.anchor = anchor;
114     }
115
116     /**
117      * Sets the rotation anchor.
118      *
119      * @param anchor the rotation anchor.
120      */
121     public void setRotationAnchor(final TextAnchor anchor) {
122         this.rotationAnchor = anchor;
123     }
124
125     /**
126      * Sets the rotation angle.
127      *
128      * @param angle the rotation angle.
129      */
130     public void setAngle(final double angle) {
131         this.angle = angle;
132     }
133
134     /**
135      * Returns the font.
136      *
137      * @return The font.
138      */
139     public Font JavaDoc getFont() {
140         return this.font;
141     }
142
143     /**
144      * Sets the font.
145      *
146      * @param font the font.
147      */
148     public void setFont(final Font JavaDoc font) {
149         this.font = font;
150     }
151
152     /**
153      * Paints the panel.
154      *
155      * @param g the graphics device.
156      */
157     public void paintComponent(final Graphics JavaDoc g) {
158
159         super.paintComponent(g);
160         final Graphics2D JavaDoc g2 = (Graphics2D JavaDoc) g;
161
162         final Dimension JavaDoc size = getSize();
163         final Insets JavaDoc insets = getInsets();
164         final Rectangle2D JavaDoc available = new Rectangle2D.Double JavaDoc(
165             insets.left, insets.top,
166             size.getWidth() - insets.left - insets.right,
167             size.getHeight() - insets.top - insets.bottom
168         );
169
170         final double x = available.getCenterX();
171         final double y = available.getCenterY();
172
173         final Line2D JavaDoc line1 = new Line2D.Double JavaDoc(x - 2.0, y + 2.0, x + 2.0, y - 2.0);
174         final Line2D JavaDoc line2 = new Line2D.Double JavaDoc(x - 2.0, y - 2.0, x + 2.0, y + 2.0);
175         g2.setPaint(Color.red);
176         g2.draw(line1);
177         g2.draw(line2);
178
179         g2.setFont(this.font);
180         g2.setPaint(Color.black);
181         if (this.rotate) {
182             TextUtilities.drawRotatedString(
183                 this.text, g2, (float) x, (float) y,
184                 this.anchor, this.angle, this.rotationAnchor
185             );
186         }
187         else {
188             TextUtilities.drawAlignedString(this.text, g2, (float) x, (float) y, this.anchor);
189         }
190
191     }
192
193 }
194
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