01: /*
02: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03: *
04: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
05: *
06: * The contents of this file are subject to the terms of either the GNU
07: * General Public License Version 2 only ("GPL") or the Common
08: * Development and Distribution License("CDDL") (collectively, the
09: * "License"). You may not use this file except in compliance with the
10: * License. You can obtain a copy of the License at
11: * http://www.netbeans.org/cddl-gplv2.html
12: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
13: * specific language governing permissions and limitations under the
14: * License. When distributing the software, include this License Header
15: * Notice in each file and include the License file at
16: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
17: * particular file as subject to the "Classpath" exception as provided
18: * by Sun in the GPL Version 2 section of the License file that
19: * accompanied this code. If applicable, add the following below the
20: * License Header, with the fields enclosed by brackets [] replaced by
21: * your own identifying information:
22: * "Portions Copyrighted [year] [name of copyright owner]"
23: *
24: * Contributor(s):
25: *
26: * The Original Software is NetBeans. The Initial Developer of the Original
27: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
28: * Microsystems, Inc. All Rights Reserved.
29: *
30: * If you wish your version of this file to be governed by only the CDDL
31: * or only the GPL Version 2, indicate your decision by adding
32: * "[Contributor] elects to include this software in this distribution
33: * under the [CDDL or GPL Version 2] license." If you do not indicate a
34: * single choice of license, a recipient has the option to distribute
35: * your version of this file under either the CDDL, the GPL Version 2 or
36: * to extend the choice of license to its licensees as provided above.
37: * However, if you add GPL Version 2 code and therefore, elected the GPL
38: * Version 2 license, then the option applies only if the new code is
39: * made subject to such option by the copyright holder.
40: */
41:
42: package org.netbeans.modules.versioning.system.cvss.ui;
43:
44: import javax.swing.*;
45: import javax.swing.plaf.basic.BasicHTML;
46: import javax.swing.text.View;
47: import java.awt.*;
48:
49: /**
50: * Swing toolkit utility methods.
51: *
52: * @author Petr Kuzel
53: */
54: public class UIUtils {
55:
56: /**
57: * Computes and sets label preferred size based
58: * on <b>preferred width</b>. Compare to standard preferred
59: * size algorithm that takes width from longest line
60: * (it does not count with fact that HTML label wraps).
61: *
62: * <p>You can rollback by <code>label.setPreferredSize(null)</code>;
63: *
64: * @param label HTML enabled imageless label to be statically patched
65: * @param ex preferred width in number of <tt>x</tt> characters in current label font
66: */
67: public static void computePreferredSize(JLabel label, int ex) {
68: assert ex > 0;
69: FontMetrics fm = label.getFontMetrics(label.getFont());
70: StringBuffer sb = new StringBuffer(ex);
71: for (int i = 0; i < ex; i++) {
72: sb.append("x"); // NOI18N
73: }
74: int exWidth = SwingUtilities.computeStringWidth(fm, sb
75: .toString());
76: View v = BasicHTML.createHTMLView(label, label.getText());
77: v.setSize(exWidth, 0);
78: int width = (int) v.getPreferredSpan(View.X_AXIS);
79: int height = (int) v.getPreferredSpan(View.Y_AXIS);
80:
81: Insets insets = label.getInsets();
82: int dx = insets.left + insets.right;
83: int dy = insets.top + insets.bottom;
84:
85: label.setPreferredSize(new Dimension(width + dx, height + dy));
86: }
87: }
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