| /* BasicComboBoxRenderer.java -- |
| Copyright (C) 2004, 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.swing.plaf.basic; |
| |
| import java.awt.Component; |
| import java.awt.Dimension; |
| import java.io.Serializable; |
| |
| import javax.swing.Icon; |
| import javax.swing.JComboBox; |
| import javax.swing.JLabel; |
| import javax.swing.JList; |
| import javax.swing.ListCellRenderer; |
| import javax.swing.border.Border; |
| import javax.swing.border.EmptyBorder; |
| |
| /** |
| * A renderer for a {@link JComboBox}. |
| * |
| * @author Olga Rodimina |
| */ |
| public class BasicComboBoxRenderer |
| extends JLabel |
| implements ListCellRenderer, Serializable |
| { |
| /** |
| * A shared border instance for all renderers. |
| */ |
| protected static Border noFocusBorder = new EmptyBorder(1, 1, 1, 1); |
| |
| /** |
| * Creates a new <code>BasicComboBoxRenderer</code> object. |
| */ |
| public BasicComboBoxRenderer() |
| { |
| setOpaque(true); |
| setBorder(noFocusBorder); |
| } |
| |
| /** |
| * Returns preferredSize of the renderer |
| * |
| * @return preferredSize of the renderer |
| */ |
| public Dimension getPreferredSize() |
| { |
| if (this.getText() != null && ! this.getText().equals("")) |
| return super.getPreferredSize(); |
| else |
| { |
| // If the combo box option's text is empty or null, it won't size |
| // properly (ie, it'll be way too short)... so we throw in a dummy |
| // space to trick the superclass's sizing methods. |
| String oldText = this.getText(); |
| this.setText(" "); |
| Dimension d = super.getPreferredSize(); |
| this.setText(oldText); |
| return d; |
| } |
| } |
| |
| /** |
| * Returns a component that has been configured to display the given |
| * <code>value</code>. |
| * |
| * @param list List of items for which to the background and foreground |
| * colors |
| * @param value object that should be rendered in the cell |
| * @param index index of the cell in the list of items. |
| * @param isSelected draw cell highlighted if isSelected is true |
| * @param cellHasFocus draw focus rectangle around cell if the cell has |
| * focus |
| * |
| * @return Component that will be used to draw the desired cell. |
| */ |
| public Component getListCellRendererComponent(JList list, Object value, |
| int index, boolean isSelected, |
| boolean cellHasFocus) |
| { |
| if (isSelected) |
| { |
| setBackground(list.getSelectionBackground()); |
| setForeground(list.getSelectionForeground()); |
| } |
| else |
| { |
| setBackground(list.getBackground()); |
| setForeground(list.getForeground()); |
| } |
| setFont(list.getFont()); |
| |
| if (value instanceof Icon) |
| setIcon((Icon) value); |
| else |
| setText(value == null ? "" : value.toString()); |
| |
| return this; |
| } |
| |
| /** |
| * A subclass of {@link BasicComboBoxRenderer} that implements the |
| * {@link javax.swing.plaf.UIResource} interface. |
| */ |
| public static class UIResource extends BasicComboBoxRenderer |
| implements javax.swing.plaf.UIResource |
| { |
| /** |
| * Creates a new <code>UIResource</code> object. |
| */ |
| public UIResource() |
| { |
| // Nothing to do here. |
| } |
| } |
| } |