Dead
[official-gcc.git] / gomp-20050608-branch / libjava / classpath / javax / swing / plaf / basic / BasicComboBoxRenderer.java
blob8115605b77a1dc707cf288d64de0b3d8f9f65f23
1 /* BasicComboBoxRenderer.java --
2 Copyright (C) 2004, 2005 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
6 GNU Classpath 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, or (at your option)
9 any later version.
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING. If not, write to the
18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 02110-1301 USA.
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
24 combination.
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module. An independent module is a module which is not derived from
33 or based on this library. If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
39 package javax.swing.plaf.basic;
41 import java.awt.Component;
42 import java.awt.Dimension;
43 import java.awt.FontMetrics;
44 import java.io.Serializable;
46 import javax.swing.JComboBox;
47 import javax.swing.JLabel;
48 import javax.swing.JList;
49 import javax.swing.ListCellRenderer;
50 import javax.swing.SwingConstants;
51 import javax.swing.SwingUtilities;
52 import javax.swing.border.Border;
53 import javax.swing.border.EmptyBorder;
55 /**
56 * A renderer for a {@link JComboBox}.
58 * @author Olga Rodimina
60 public class BasicComboBoxRenderer
61 extends JLabel
62 implements ListCellRenderer, Serializable
64 /**
65 * A shared border instance for all renderers.
67 protected static Border noFocusBorder = new EmptyBorder(0, 0, 0, 0);
69 /**
70 * Creates a new <code>BasicComboBoxRenderer</code> object.
72 public BasicComboBoxRenderer()
74 setHorizontalAlignment(SwingConstants.LEFT);
75 setBorder(noFocusBorder);
78 /**
79 * Returns preferredSize of the renderer
81 * @return preferredSize of the renderer
83 public Dimension getPreferredSize()
85 return super.getPreferredSize();
88 /**
89 * Returns a component that has been configured to display the given
90 * <code>value</code>.
92 * @param list List of items for which to the background and foreground
93 * colors
94 * @param value object that should be rendered in the cell
95 * @param index index of the cell in the list of items.
96 * @param isSelected draw cell highlighted if isSelected is true
97 * @param cellHasFocus draw focus rectangle around cell if the cell has
98 * focus
100 * @return Component that will be used to draw the desired cell.
102 public Component getListCellRendererComponent(JList list, Object value,
103 int index, boolean isSelected,
104 boolean cellHasFocus)
106 String s = value.toString();
108 // String maybe larger than comboBox.
109 FontMetrics fm = getToolkit().getFontMetrics(list.getFont());
110 int strWidth = SwingUtilities.computeStringWidth(fm, s);
111 int cbWidth = getSize().width;
112 if (cbWidth != 0 && strWidth > cbWidth)
114 char[] str = s.toCharArray();
115 int currWidth = 0;
116 int i = 0;
117 String postStr = "... ";
118 cbWidth -= SwingUtilities.computeStringWidth(fm, postStr);
119 while (i < str.length && currWidth < cbWidth)
121 ++i;
122 currWidth = SwingUtilities.computeStringWidth(fm, new String(str, 0, i));
124 setText(new String(str, 0, i) + postStr);
126 else
127 setText(s);
129 setOpaque(true);
131 if (isSelected || cellHasFocus)
133 setBackground(list.getSelectionBackground());
134 setForeground(list.getSelectionForeground());
136 else
138 setBackground(list.getBackground());
139 setForeground(list.getForeground());
142 setEnabled(list.isEnabled());
143 setFont(list.getFont());
144 return this;
148 * A subclass of {@link BasicComboBoxRenderer} that implements the
149 * {@link javax.swing.plaf.UIResource} interface.
151 public static class UIResource extends BasicComboBoxRenderer
152 implements javax.swing.plaf.UIResource
155 * Creates a new <code>UIResource</code> object.
157 public UIResource()
159 // Nothing to do here.