1 /*
2 * File: ITitleRenderer.java
3 * Copyright (c) 2004-2007 Peter Kliem (Peter.Kliem@jaret.de)
4 * A commercial license is available, see http://www.jaret.de.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20 package de.jaret.util.ui.timebars.swing.renderer;
21
22 import java.awt.Color;
23 import java.awt.GradientPaint;
24 import java.awt.Graphics;
25 import java.awt.Graphics2D;
26 import java.awt.geom.Rectangle2D;
27
28 import javax.swing.JComponent;
29
30 import de.jaret.util.swing.GraphicsHelper;
31 import de.jaret.util.ui.timebars.swing.TimeBarViewer;
32
33 /**
34 * A default title renderer rendering the name of the viewer as large as possible.
35 *
36 * @author kliem
37 * @version $Id: DefaultTitleRenderer.java 802 2008-12-28 12:30:41Z kliem $
38 */
39 public class DefaultTitleRenderer implements ITitleRenderer {
40 /** the cached component used for rendering. */
41 protected TitleRendererComponent _titleRendererComponent;
42
43 /**
44 * Default constructor.
45 */
46 public DefaultTitleRenderer() {
47 _titleRendererComponent = new TitleRendererComponent();
48 }
49
50 /**
51 * {@inheritDoc}
52 */
53 public JComponent getTitleRendererComponent(TimeBarViewer tbv) {
54 _titleRendererComponent.setDisplayName(tbv.getName());
55 return _titleRendererComponent;
56 }
57
58 /**
59 * Component used for rendering. This always tries to print out the name set at a maximum size.
60 *
61 * @author kliem
62 * @version $Id: DefaultTitleRenderer.java 802 2008-12-28 12:30:41Z kliem $
63 */
64 public static class TitleRendererComponent extends JComponent {
65 /** the text to display. */
66 private String _name;
67 /** the last width of painting. Used to determine whether the font size has to be determined. */
68 private int _lastWidth = -1;
69 /** margin in pixel to use. */
70 private static final int MARGIN = 3;
71 /** remebered size. */
72 private float _size = 8;
73
74 /**
75 * Default constructor.
76 */
77 public TitleRendererComponent() {
78 setLayout(null);
79 setOpaque(false);
80 }
81
82 /**
83 * Set the name to be displayed.
84 *
85 * @param name the name
86 */
87 public void setDisplayName(String name) {
88 _name = name;
89 }
90
91 /**
92 * {@inheritDoc}
93 */
94 public String getToolTipText() {
95 return "<html><b>" + _name + "</b></html>";
96 }
97
98 /**
99 * {@inheritDoc}
100 */
101 protected void paintComponent(Graphics graphics) {
102 super.paintComponent(graphics);
103 int height = getHeight();
104 int width = getWidth();
105
106 // draw a simple gradient fill
107 Graphics2D g2 = (Graphics2D) graphics.create();
108 GradientPaint gradientPaint = new GradientPaint(0, 0, Color.BLUE, width / 2, height / 2, Color.WHITE, false);
109 g2.setPaint(gradientPaint);
110 g2.fillRect(0, 0, width, height);
111
112 // determine the size of the font if the widht has changed
113 if (_lastWidth != width) {
114 _lastWidth = width;
115
116 for (float size = 6; size < 37; size += 1) {
117 graphics.setFont(graphics.getFont().deriveFont(size));
118 Rectangle2D rect = graphics.getFontMetrics().getStringBounds(_name, graphics);
119 if (rect.getWidth() > width - 2 * MARGIN) {
120 graphics.setFont(graphics.getFont().deriveFont(size - 1));
121 _size = size - 1;
122 break;
123 }
124 _size = size;
125 }
126
127 } else {
128 graphics.setFont(graphics.getFont().deriveFont(_size));
129 }
130
131 // draw the title String
132 graphics.setColor(Color.BLACK);
133 GraphicsHelper.drawStringCenteredVCenter(graphics, _name, 0, width, height / 2);
134 }
135
136 }
137
138 }