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+/* 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.
+ }
+ }
+}